Merge "Correct way to specify additional dependencies"

Previous one was not covering all the targets

Bug: 17548097
Change-Id: I425e0f8d6e5a43feabd29dcb327049b82754d249

CleanSpec.mk

@@ -44,6 +44,10 @@
 #$(call add-clean-step, find $(OUT_DIR) -type f -name "IGTalkSession*" -print0 | xargs -0 rm -f)
 #$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
 
+# Switching to jemalloc requires deleting these files.
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libc_*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libc_*)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************

README.md

@@ -4,40 +4,52 @@ Working on bionic
 What are the big pieces of bionic?
 ----------------------------------
 
-libc/ --- libc.so, libc.a
-  The C library. Stuff like fopen(3) and kill(2).
-libm/ --- libm.so, libm.a
-  The math library. Traditionally Unix systems kept stuff like sin(3) and
-  cos(3) in a separate library to save space in the days before shared
-  libraries.
-libdl/ --- libdl.so
-  The dynamic linker interface library. This is actually just a bunch of
-  stubs that the dynamic linker replaces with pointers to its own
-  implementation at runtime. This is where stuff like dlopen(3) lives.
-libstdc++/ --- libstdc++.so
-  The C++ ABI support functions. The C++ compiler doesn't know how to
-  implement thread-safe static initialization and the like, so it just calls
-  functions that are supplied by the system. Stuff like __cxa_guard_acquire
-  and __cxa_pure_virtual live here.
+#### libc/ --- libc.so, libc.a
 
-linker/ --- /system/bin/linker and /system/bin/linker64
-  The dynamic linker. When you run a dynamically-linked executable, its ELF
-  file has a DT_INTERP entry that says "use the following program to start me".
-  On Android, that's either linker or linker64 (depending on whether it's a
-  32-bit or 64-bit executable). It's responsible for loading the ELF executable
-  into memory and resolving references to symbols (so that when your code tries
-  to jump to fopen(3), say, it lands in the right place).
+The C library. Stuff like `fopen(3)` and `kill(2)`.
 
-tests/ --- unit tests
-  The tests/ directory contains unit tests. Roughly arranged as one file per
-  publicly-exported header file.
-benchmarks/ --- benchmarks
-  The benchmarks/ directory contains benchmarks.
+#### libm/ --- libm.so, libm.a
+
+The math library. Traditionally Unix systems kept stuff like `sin(3)` and
+`cos(3)` in a separate library to save space in the days before shared
+libraries.
+
+#### libdl/ --- libdl.so
+
+The dynamic linker interface library. This is actually just a bunch of stubs
+that the dynamic linker replaces with pointers to its own implementation at
+runtime. This is where stuff like `dlopen(3)` lives.
+
+#### libstdc++/ --- libstdc++.so
+
+The C++ ABI support functions. The C++ compiler doesn't know how to implement
+thread-safe static initialization and the like, so it just calls functions that
+are supplied by the system. Stuff like `__cxa_guard_acquire` and
+`__cxa_pure_virtual` live here.
+
+#### linker/ --- /system/bin/linker and /system/bin/linker64
+
+The dynamic linker. When you run a dynamically-linked executable, its ELF file
+has a `DT_INTERP` entry that says "use the following program to start me".  On
+Android, that's either `linker` or `linker64` (depending on whether it's a
+32-bit or 64-bit executable). It's responsible for loading the ELF executable
+into memory and resolving references to symbols (so that when your code tries to
+jump to `fopen(3)`, say, it lands in the right place).
+
+#### tests/ --- unit tests
+
+The `tests/` directory contains unit tests. Roughly arranged as one file per
+publicly-exported header file.
+
+#### benchmarks/ --- benchmarks
+
+The `benchmarks/` directory contains benchmarks.
 
 
 What's in libc/?
 ----------------
 
+<pre>
 libc/
   arch-arm/
   arch-arm64/
@@ -81,13 +93,6 @@ libc/
   private/
     # These are private header files meant for use within bionic itself.
 
-  stdio/
-  stdlib/
-  unistd/
-    # These are legacy files of unknown provenance. In the past, bionic was a
-    # mess of random versions of random files from all three of FreeBSD, NetBSD,
-    # and OpenBSD! We've been working to clean that up, but these directories
-    # are basically where all the stuff we haven't got to yet lives.
   dns/
     # Contains the DNS resolver (originates from NetBSD code).
 
@@ -114,6 +119,10 @@ libc/
     # current upstream source in one of the upstream directories or by
     # switching the file to C++ and cleaning it up.
 
+  stdio/
+    # These are legacy files of dubious provenance. We're working to clean
+    # this mess up, and this directory should disappear.
+
   tools/
     # Various tools used to maintain bionic.
 
@@ -124,6 +133,7 @@ libc/
   zoneinfo/
     # Android-format time zone data.
     # See 'Updating tzdata' later.
+</pre>
 
 
 Adding system calls
@@ -163,3 +173,74 @@ This is fully automated:
 
   1. Run update-tzdata.py.
 
+
+Running the tests
+-----------------
+
+The tests are all built from the tests/ directory.
+
+### Device tests
+
+    $ mma
+    $ adb sync
+    $ adb shell /data/nativetest/bionic-unit-tests/bionic-unit-tests32
+    $ adb shell \
+        /data/nativetest/bionic-unit-tests-static/bionic-unit-tests-static32
+    # Only for 64-bit targets
+    $ adb shell /data/nativetest/bionic-unit-tests/bionic-unit-tests64
+    $ adb shell \
+        /data/nativetest/bionic-unit-tests-static/bionic-unit-tests-static64
+
+### Host tests
+
+The host tests require that you have `lunch`ed either an x86 or x86_64 target.
+
+    $ mma
+    # 64-bit tests for 64-bit targets, 32-bit otherwise.
+    $ mm bionic-unit-tests-run-on-host
+    # Only exists for 64-bit targets.
+    $ mm bionic-unit-tests-run-on-host32
+
+### Against glibc
+
+As a way to check that our tests do in fact test the correct behavior (and not
+just the behavior we think is correct), it is possible to run the tests against
+the host's glibc.
+
+    $ mma
+    $ bionic-unit-tests-glibc32 # already in your path
+    $ bionic-unit-tests-glibc64
+
+
+Gathering test coverage
+-----------------------
+
+For either host or target coverage, you must first:
+
+ * `$ export NATIVE_COVERAGE=true`
+     * Note that the build system is ignorant to this flag being toggled, i.e. if
+       you change this flag, you will have to manually rebuild bionic.
+ * Set `bionic_coverage=true` in `libc/Android.mk` and `libm/Android.mk`.
+
+### Coverage from device tests
+
+    $ mma
+    $ adb sync
+    $ adb shell \
+        GCOV_PREFIX=/data/local/tmp/gcov \
+        GCOV_PREFIX_STRIP=`echo $ANDROID_BUILD_TOP | grep -o / | wc -l` \
+        /data/nativetest/bionic-unit-tests/bionic-unit-tests32
+    $ acov
+
+`acov` will pull all coverage information from the device, push it to the right
+directories, run `lcov`, and open the coverage report in your browser.
+
+### Coverage from host tests
+
+First, build and run the host tests as usual (see above).
+
+    $ croot
+    $ lcov -c -d $ANDROID_PRODUCT_OUT -o coverage.info
+    $ genhtml -o covreport coverage.info # or lcov --list coverage.info
+
+The coverage report is now available at `covreport/index.html`.

benchmarks/Android.mk

@@ -24,7 +24,7 @@ LOCAL_PATH := $(call my-dir)
 
 benchmark_c_flags = \
     -O2 \
-    -Wall -Wextra \
+    -Wall -Wextra -Wunused \
     -Werror \
     -fno-builtin \
     -std=gnu++11 \
@@ -49,12 +49,11 @@ LOCAL_MODULE_STEM_64 := bionic-benchmarks64
 LOCAL_MULTILIB := both
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 LOCAL_CFLAGS += $(benchmark_c_flags)
-LOCAL_C_INCLUDES += external/stlport/stlport bionic/ bionic/libstdc++/include
-LOCAL_SHARED_LIBRARIES += libstlport
 LOCAL_SRC_FILES := $(benchmark_src_files)
+LOCAL_CXX_STL := libc++
 include $(BUILD_EXECUTABLE)
 
-ifeq ($(HOST_OS)-$(HOST_ARCH),linux-x86)
+ifeq ($(HOST_OS)-$(HOST_ARCH),$(filter $(HOST_OS)-$(HOST_ARCH),linux-x86 linux-x86_64))
 ifeq ($(TARGET_ARCH),x86)
 LINKER = linker
 NATIVE_SUFFIX=32

benchmarks/benchmark_main.cpp

@@ -25,13 +25,14 @@
 
 #include <inttypes.h>
 
-static int64_t gBytesProcessed;
-static int64_t gBenchmarkTotalTimeNs;
-static int64_t gBenchmarkStartTimeNs;
+static int64_t g_bytes_processed;
+static int64_t g_benchmark_total_time_ns;
+static int64_t g_benchmark_start_time_ns;
 
 typedef std::map<std::string, ::testing::Benchmark*> BenchmarkMap;
 typedef BenchmarkMap::iterator BenchmarkMapIt;
-static BenchmarkMap gBenchmarks;
+static BenchmarkMap g_benchmarks;
+static int g_name_column_width = 20;
 
 static int Round(int n) {
   int base = 1;
@@ -96,7 +97,7 @@ void Benchmark::Register(const char* name, void (*fn)(int), void (*fn_range)(int
     exit(EXIT_FAILURE);
   }
 
-  gBenchmarks.insert(std::make_pair(name, this));
+  g_benchmarks.insert(std::make_pair(name, this));
 }
 
 void Benchmark::Run() {
@@ -114,16 +115,16 @@ void Benchmark::Run() {
 }
 
 void Benchmark::RunRepeatedlyWithArg(int iterations, int arg) {
-  gBytesProcessed = 0;
-  gBenchmarkTotalTimeNs = 0;
-  gBenchmarkStartTimeNs = NanoTime();
+  g_bytes_processed = 0;
+  g_benchmark_total_time_ns = 0;
+  g_benchmark_start_time_ns = NanoTime();
   if (fn_ != NULL) {
     fn_(iterations);
   } else {
     fn_range_(iterations, arg);
   }
-  if (gBenchmarkStartTimeNs != 0) {
-    gBenchmarkTotalTimeNs += NanoTime() - gBenchmarkStartTimeNs;
+  if (g_benchmark_start_time_ns != 0) {
+    g_benchmark_total_time_ns += NanoTime() - g_benchmark_start_time_ns;
   }
 }
 
@@ -131,12 +132,12 @@ void Benchmark::RunWithArg(int arg) {
   // run once in case it's expensive
   int iterations = 1;
   RunRepeatedlyWithArg(iterations, arg);
-  while (gBenchmarkTotalTimeNs < 1e9 && iterations < 1e9) {
+  while (g_benchmark_total_time_ns < 1e9 && iterations < 1e9) {
     int last = iterations;
-    if (gBenchmarkTotalTimeNs/iterations == 0) {
+    if (g_benchmark_total_time_ns/iterations == 0) {
       iterations = 1e9;
     } else {
-      iterations = 1e9 / (gBenchmarkTotalTimeNs/iterations);
+      iterations = 1e9 / (g_benchmark_total_time_ns/iterations);
     }
     iterations = std::max(last + 1, std::min(iterations + iterations/2, 100*last));
     iterations = Round(iterations);
@@ -145,9 +146,9 @@ void Benchmark::RunWithArg(int arg) {
 
   char throughput[100];
   throughput[0] = '\0';
-  if (gBenchmarkTotalTimeNs > 0 && gBytesProcessed > 0) {
-    double mib_processed = static_cast<double>(gBytesProcessed)/1e6;
-    double seconds = static_cast<double>(gBenchmarkTotalTimeNs)/1e9;
+  if (g_benchmark_total_time_ns > 0 && g_bytes_processed > 0) {
+    double mib_processed = static_cast<double>(g_bytes_processed)/1e6;
+    double seconds = static_cast<double>(g_benchmark_total_time_ns)/1e9;
     snprintf(throughput, sizeof(throughput), " %8.2f MiB/s", mib_processed/seconds);
   }
 
@@ -164,42 +165,47 @@ void Benchmark::RunWithArg(int arg) {
     snprintf(full_name, sizeof(full_name), "%s", name_);
   }
 
-  printf("%-20s %10d %10" PRId64 "%s\n", full_name,
-         iterations, gBenchmarkTotalTimeNs/iterations, throughput);
+  printf("%-*s %10d %10" PRId64 "%s\n", g_name_column_width, full_name,
+         iterations, g_benchmark_total_time_ns/iterations, throughput);
   fflush(stdout);
 }
 
 }  // namespace testing
 
 void SetBenchmarkBytesProcessed(int64_t x) {
-  gBytesProcessed = x;
+  g_bytes_processed = x;
 }
 
 void StopBenchmarkTiming() {
-  if (gBenchmarkStartTimeNs != 0) {
-    gBenchmarkTotalTimeNs += NanoTime() - gBenchmarkStartTimeNs;
+  if (g_benchmark_start_time_ns != 0) {
+    g_benchmark_total_time_ns += NanoTime() - g_benchmark_start_time_ns;
   }
-  gBenchmarkStartTimeNs = 0;
+  g_benchmark_start_time_ns = 0;
 }
 
 void StartBenchmarkTiming() {
-  if (gBenchmarkStartTimeNs == 0) {
-    gBenchmarkStartTimeNs = NanoTime();
+  if (g_benchmark_start_time_ns == 0) {
+    g_benchmark_start_time_ns = NanoTime();
   }
 }
 
 int main(int argc, char* argv[]) {
-  if (gBenchmarks.empty()) {
+  if (g_benchmarks.empty()) {
     fprintf(stderr, "No benchmarks registered!\n");
     exit(EXIT_FAILURE);
   }
 
+  for (BenchmarkMapIt it = g_benchmarks.begin(); it != g_benchmarks.end(); ++it) {
+    int name_width = static_cast<int>(strlen(it->second->Name()));
+    g_name_column_width = std::max(g_name_column_width, name_width);
+  }
+
   bool need_header = true;
-  for (BenchmarkMapIt it = gBenchmarks.begin(); it != gBenchmarks.end(); ++it) {
+  for (BenchmarkMapIt it = g_benchmarks.begin(); it != g_benchmarks.end(); ++it) {
     ::testing::Benchmark* b = it->second;
     if (b->ShouldRun(argc, argv)) {
       if (need_header) {
-        printf("%-20s %10s %10s\n", "", "iterations", "ns/op");
+        printf("%-*s %10s %10s\n", g_name_column_width, "", "iterations", "ns/op");
         fflush(stdout);
         need_header = false;
       }
@@ -210,7 +216,7 @@ int main(int argc, char* argv[]) {
   if (need_header) {
     fprintf(stderr, "No matching benchmarks!\n");
     fprintf(stderr, "Available benchmarks:\n");
-    for (BenchmarkMapIt it = gBenchmarks.begin(); it != gBenchmarks.end(); ++it) {
+    for (BenchmarkMapIt it = g_benchmarks.begin(); it != g_benchmarks.end(); ++it) {
       fprintf(stderr, "  %s\n", it->second->Name());
     }
     exit(EXIT_FAILURE);

benchmarks/math_benchmark.cpp

@@ -16,11 +16,12 @@
 
 #include "benchmark.h"
 
+#include <fenv.h>
 #include <math.h>
 
 // Avoid optimization.
-double d;
-double v;
+volatile double d;
+volatile double v;
 
 static void BM_math_sqrt(int iters) {
   StartBenchmarkTiming();
@@ -113,10 +114,49 @@ static void BM_math_isinf_ZERO(int iters) {
 }
 BENCHMARK(BM_math_isinf_ZERO);
 
+static void BM_math_sin_fast(int iters) {
+  StartBenchmarkTiming();
 
+  d = 1.0;
+  for (int i = 0; i < iters; ++i) {
+    d += sin(d);
+  }
 
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_math_sin_fast);
 
+static void BM_math_sin_feupdateenv(int iters) {
+  StartBenchmarkTiming();
 
+  d = 1.0;
+  for (int i = 0; i < iters; ++i) {
+    fenv_t __libc_save_rm;
+    feholdexcept(&__libc_save_rm);
+    fesetround(FE_TONEAREST);
+    d += sin(d);
+    feupdateenv(&__libc_save_rm);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_math_sin_feupdateenv);
+
+static void BM_math_sin_fesetenv(int iters) {
+  StartBenchmarkTiming();
+
+  d = 1.0;
+  for (int i = 0; i < iters; ++i) {
+    fenv_t __libc_save_rm;
+    feholdexcept(&__libc_save_rm);
+    fesetround(FE_TONEAREST);
+    d += sin(d);
+    fesetenv(&__libc_save_rm);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_math_sin_fesetenv);
 
 static void BM_math_fpclassify_NORMAL(int iters) {
   StartBenchmarkTiming();

benchmarks/property_benchmark.cpp

@@ -28,12 +28,14 @@
 
 extern void *__system_property_area__;
 
+// Do not exceed 512, that is about the largest number of properties
+// that can be created with the current property area size.
 #define TEST_NUM_PROPS \
-    Arg(1)->Arg(4)->Arg(16)->Arg(64)->Arg(128)->Arg(256)->Arg(512)->Arg(1024)
+    Arg(1)->Arg(4)->Arg(16)->Arg(64)->Arg(128)->Arg(256)->Arg(512)
 
 struct LocalPropertyTestState {
     LocalPropertyTestState(int nprops) : nprops(nprops), valid(false) {
-        static const char prop_name_chars[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_";
+        static const char prop_name_chars[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_.";
 
         const char* android_data = getenv("ANDROID_DATA");
         if (android_data == NULL) {
@@ -66,18 +68,38 @@ struct LocalPropertyTestState {
         srandom(nprops);
 
         for (int i = 0; i < nprops; i++) {
-            name_lens[i] = random() % PROP_NAME_MAX;
+            // Make sure the name has at least 10 characters to make
+            // it very unlikely to generate the same random name.
+            name_lens[i] = (random() % (PROP_NAME_MAX - 10)) + 10;
             names[i] = new char[PROP_NAME_MAX + 1];
+            size_t prop_name_len = sizeof(prop_name_chars) - 1;
             for (int j = 0; j < name_lens[i]; j++) {
-                names[i][j] = prop_name_chars[random() % (sizeof(prop_name_chars) - 1)];
+                if (j == 0 || names[i][j-1] == '.' || j == name_lens[i] - 1) {
+                    // Certain values are not allowed:
+                    // - Don't start name with '.'
+                    // - Don't allow '.' to appear twice in a row
+                    // - Don't allow the name to end with '.'
+                    // This assumes that '.' is the last character in the
+                    // array so that decrementing the length by one removes
+                    // the value from the possible values.
+                    prop_name_len--;
+                }
+                names[i][j] = prop_name_chars[random() % prop_name_len];
             }
             names[i][name_lens[i]] = 0;
-            value_lens[i] = random() % PROP_VALUE_MAX;
+
+            // Make sure the value contains at least 1 character.
+            value_lens[i] = (random() % (PROP_VALUE_MAX - 1)) + 1;
             values[i] = new char[PROP_VALUE_MAX];
             for (int j = 0; j < value_lens[i]; j++) {
                 values[i][j] = prop_name_chars[random() % (sizeof(prop_name_chars) - 1)];
             }
-            __system_property_add(names[i], name_lens[i], values[i], value_lens[i]);
+
+            if (__system_property_add(names[i], name_lens[i], values[i], value_lens[i]) < 0) {
+                printf("Failed to add a property, terminating...\n");
+                printf("%s = %.*s\n", names[i], value_lens[i], values[i]);
+                exit(1);
+            }
         }
 
         valid = true;
@@ -156,3 +178,56 @@ static void BM_property_find(int iters, int nprops)
     StopBenchmarkTiming();
 }
 BENCHMARK(BM_property_find)->TEST_NUM_PROPS;
+
+static void BM_property_read(int iters, int nprops)
+{
+    StopBenchmarkTiming();
+
+    LocalPropertyTestState pa(nprops);
+
+    if (!pa.valid)
+        return;
+
+    srandom(iters * nprops);
+    const prop_info** pinfo = new const prop_info*[iters];
+    char propvalue[PROP_VALUE_MAX];
+
+    for (int i = 0; i < iters; i++) {
+        pinfo[i] = __system_property_find(pa.names[random() % nprops]);
+    }
+
+    StartBenchmarkTiming();
+    for (int i = 0; i < iters; i++) {
+        __system_property_read(pinfo[i], 0, propvalue);
+    }
+    StopBenchmarkTiming();
+
+    delete[] pinfo;
+}
+BENCHMARK(BM_property_read)->TEST_NUM_PROPS;
+
+static void BM_property_serial(int iters, int nprops)
+{
+    StopBenchmarkTiming();
+
+    LocalPropertyTestState pa(nprops);
+
+    if (!pa.valid)
+        return;
+
+    srandom(iters * nprops);
+    const prop_info** pinfo = new const prop_info*[iters];
+
+    for (int i = 0; i < iters; i++) {
+        pinfo[i] = __system_property_find(pa.names[random() % nprops]);
+    }
+
+    StartBenchmarkTiming();
+    for (int i = 0; i < iters; i++) {
+        __system_property_serial(pinfo[i]);
+    }
+    StopBenchmarkTiming();
+
+    delete[] pinfo;
+}
+BENCHMARK(BM_property_serial)->TEST_NUM_PROPS;

benchmarks/pthread_benchmark.cpp

@@ -18,11 +18,14 @@
 
 #include <pthread.h>
 
+// Stop GCC optimizing out our pure function.
+/* Must not be static! */ pthread_t (*pthread_self_fp)() = pthread_self;
+
 static void BM_pthread_self(int iters) {
   StartBenchmarkTiming();
 
   for (int i = 0; i < iters; ++i) {
-    pthread_self();
+    pthread_self_fp();
   }
 
   StopBenchmarkTiming();
@@ -102,3 +105,35 @@ static void BM_pthread_mutex_lock_RECURSIVE(int iters) {
   StopBenchmarkTiming();
 }
 BENCHMARK(BM_pthread_mutex_lock_RECURSIVE);
+
+static void BM_pthread_rw_lock_read(int iters) {
+  StopBenchmarkTiming();
+  pthread_rwlock_t lock;
+  pthread_rwlock_init(&lock, NULL);
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    pthread_rwlock_rdlock(&lock);
+    pthread_rwlock_unlock(&lock);
+  }
+
+  StopBenchmarkTiming();
+  pthread_rwlock_destroy(&lock);
+}
+BENCHMARK(BM_pthread_rw_lock_read);
+
+static void BM_pthread_rw_lock_write(int iters) {
+  StopBenchmarkTiming();
+  pthread_rwlock_t lock;
+  pthread_rwlock_init(&lock, NULL);
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    pthread_rwlock_wrlock(&lock);
+    pthread_rwlock_unlock(&lock);
+  }
+
+  StopBenchmarkTiming();
+  pthread_rwlock_destroy(&lock);
+}
+BENCHMARK(BM_pthread_rw_lock_write);

benchmarks/time_benchmark.cpp

@@ -16,23 +16,64 @@
 
 #include "benchmark.h"
 
+#include <sys/syscall.h>
 #include <time.h>
 
-#if defined(__BIONIC__)
-
-// Used by the horrible android.text.format.Time class, which is used by Calendar. http://b/8270865.
-extern "C" void localtime_tz(const time_t* const timep, struct tm* tmp, const char* tz);
-
-static void BM_time_localtime_tz(int iters) {
+static void BM_time_clock_gettime(int iters) {
   StartBenchmarkTiming();
 
-  time_t now(time(NULL));
-  tm broken_down_time;
+  timespec t;
   for (int i = 0; i < iters; ++i) {
-    localtime_tz(&now, &broken_down_time, "Europe/Berlin");
+    clock_gettime(CLOCK_MONOTONIC, &t);
   }
 
   StopBenchmarkTiming();
 }
-BENCHMARK(BM_time_localtime_tz);
-#endif
+BENCHMARK(BM_time_clock_gettime);
+
+static void BM_time_clock_gettime_syscall(int iters) {
+  StartBenchmarkTiming();
+
+  timespec t;
+  for (int i = 0; i < iters; ++i) {
+    syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_time_clock_gettime_syscall);
+
+static void BM_time_gettimeofday(int iters) {
+  StartBenchmarkTiming();
+
+  timeval tv;
+  for (int i = 0; i < iters; ++i) {
+    gettimeofday(&tv, NULL);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_time_gettimeofday);
+
+static void BM_time_gettimeofday_syscall(int iters) {
+  StartBenchmarkTiming();
+
+  timeval tv;
+  for (int i = 0; i < iters; ++i) {
+    syscall(__NR_gettimeofday, &tv, NULL);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_time_gettimeofday_syscall);
+
+static void BM_time_time(int iters) {
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    time(NULL);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_time_time);

benchmarks/unistd_benchmark.cpp

@@ -16,6 +16,7 @@
 
 #include "benchmark.h"
 
+#include <sys/syscall.h>
 #include <unistd.h>
 
 static void BM_unistd_getpid(int iters) {
@@ -28,3 +29,39 @@ static void BM_unistd_getpid(int iters) {
   StopBenchmarkTiming();
 }
 BENCHMARK(BM_unistd_getpid);
+
+static void BM_unistd_getpid_syscall(int iters) {
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    syscall(__NR_getpid);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_unistd_getpid_syscall);
+
+// Stop GCC optimizing out our pure function.
+/* Must not be static! */ pid_t (*gettid_fp)() = gettid;
+
+static void BM_unistd_gettid(int iters) {
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    gettid_fp();
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_unistd_gettid);
+
+static void BM_unistd_gettid_syscall(int iters) {
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    syscall(__NR_gettid);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_unistd_gettid_syscall);

libc/Android.mk

@@ -1,5 +1,7 @@
 LOCAL_PATH := $(call my-dir)
 
+bionic_coverage := false
+
 # Make everything depend on any changes to included makefiles.
 libc_common_additional_dependencies := $(LOCAL_PATH)/Android.mk
 
@@ -37,44 +39,28 @@ endif
 # Define the common source files for all the libc instances
 # =========================================================
 libc_common_src_files := \
-    bionic/arc4random.c \
     bionic/bindresvport.c \
-    bionic/daemon.c \
-    bionic/err.c \
     bionic/ether_aton.c \
     bionic/ether_ntoa.c \
-    bionic/fdprintf.c \
-    bionic/ftime.c \
     bionic/fts.c \
-    bionic/getdtablesize.c \
     bionic/gethostname.c \
     bionic/getpriority.c \
-    bionic/getpt.c \
     bionic/if_indextoname.c \
     bionic/if_nametoindex.c \
     bionic/initgroups.c \
     bionic/ioctl.c \
     bionic/isatty.c \
-    bionic/issetugid.c \
-    bionic/md5.c \
     bionic/memmem.c \
-    bionic/pathconf.c \
-    bionic/ptsname.c \
-    bionic/ptsname_r.c \
     bionic/pututline.c \
     bionic/sched_cpualloc.c \
     bionic/sched_cpucount.c \
-    bionic/semaphore.c \
     bionic/sigblock.c \
     bionic/siginterrupt.c \
     bionic/sigsetmask.c \
     bionic/system_properties_compat.c \
-    bionic/unlockpt.c \
-    stdio/findfp.c \
     stdio/snprintf.c\
     stdio/sprintf.c \
-    stdlib/atexit.c \
-    unistd/syslog.c \
+    stdio/stdio_ext.cpp \
 
 # Fortify implementations of libc functions.
 libc_common_src_files += \
@@ -98,18 +84,25 @@ libc_common_src_files += \
 
 libc_bionic_src_files := \
     bionic/abort.cpp \
+    bionic/accept.cpp \
+    bionic/accept4.cpp \
     bionic/access.cpp \
     bionic/assert.cpp \
     bionic/atof.cpp \
-    bionic/__bionic_name_mem.cpp \
+    bionic/bionic_systrace.cpp \
     bionic/bionic_time_conversions.cpp \
     bionic/brk.cpp \
+    bionic/c16rtomb.cpp \
+    bionic/c32rtomb.cpp \
     bionic/chmod.cpp \
     bionic/chown.cpp \
     bionic/clearenv.cpp \
     bionic/clock.cpp \
+    bionic/clock_nanosleep.cpp \
     bionic/clone.cpp \
-    bionic/cmsg_nxthdr.cpp \
+    bionic/__cmsg_nxthdr.cpp \
+    bionic/connect.cpp \
+    bionic/ctype.cpp \
     bionic/dirent.cpp \
     bionic/dup2.cpp \
     bionic/epoll_create.cpp \
@@ -125,7 +118,11 @@ libc_bionic_src_files := \
     bionic/futimens.cpp \
     bionic/getauxval.cpp \
     bionic/getcwd.cpp \
+    bionic/getentropy_linux.c \
     bionic/getpgrp.cpp \
+    bionic/getpid.cpp \
+    bionic/gettid.cpp \
+    bionic/__gnu_basename.cpp \
     bionic/inotify_init.cpp \
     bionic/lchown.cpp \
     bionic/lfs64_support.cpp \
@@ -137,13 +134,21 @@ libc_bionic_src_files := \
     bionic/link.cpp \
     bionic/locale.cpp \
     bionic/lstat.cpp \
+    bionic/malloc_info.cpp \
+    bionic/mbrtoc16.cpp \
+    bionic/mbrtoc32.cpp \
+    bionic/mbstate.cpp \
     bionic/mkdir.cpp \
     bionic/mkfifo.cpp \
     bionic/mknod.cpp \
+    bionic/mntent.cpp \
+    bionic/NetdClientDispatch.cpp \
     bionic/open.cpp \
+    bionic/pathconf.cpp \
     bionic/pause.cpp \
     bionic/pipe.cpp \
     bionic/poll.cpp \
+    bionic/posix_fadvise.cpp \
     bionic/posix_fallocate.cpp \
     bionic/posix_timers.cpp \
     bionic/pthread_atfork.cpp \
@@ -155,6 +160,7 @@ libc_bionic_src_files := \
     bionic/pthread_exit.cpp \
     bionic/pthread_getcpuclockid.cpp \
     bionic/pthread_getschedparam.cpp \
+    bionic/pthread_gettid_np.cpp \
     bionic/pthread_internals.cpp \
     bionic/pthread_join.cpp \
     bionic/pthread_key.cpp \
@@ -167,7 +173,9 @@ libc_bionic_src_files := \
     bionic/pthread_setschedparam.cpp \
     bionic/pthread_sigmask.cpp \
     bionic/ptrace.cpp \
+    bionic/pty.cpp \
     bionic/raise.cpp \
+    bionic/rand.cpp \
     bionic/readlink.cpp \
     bionic/reboot.cpp \
     bionic/recv.cpp \
@@ -176,6 +184,7 @@ libc_bionic_src_files := \
     bionic/scandir.cpp \
     bionic/sched_getaffinity.cpp \
     bionic/sched_getcpu.cpp \
+    bionic/semaphore.cpp \
     bionic/send.cpp \
     bionic/setegid.cpp \
     bionic/__set_errno.cpp \
@@ -193,39 +202,47 @@ libc_bionic_src_files := \
     bionic/sigprocmask.cpp \
     bionic/sigsuspend.cpp \
     bionic/sigwait.cpp \
+    bionic/socket.cpp \
     bionic/stat.cpp \
     bionic/statvfs.cpp \
+    bionic/strcoll_l.cpp \
     bionic/strerror.cpp \
     bionic/strerror_r.cpp \
+    bionic/strftime_l.cpp \
     bionic/strsignal.cpp \
     bionic/strtold.cpp \
+    bionic/strtold_l.cpp \
+    bionic/strtoll_l.cpp \
+    bionic/strtoull_l.cpp \
+    bionic/strxfrm_l.cpp \
     bionic/stubs.cpp \
     bionic/symlink.cpp \
     bionic/sysconf.cpp \
+    bionic/syslog.cpp \
     bionic/sys_siglist.c \
     bionic/sys_signame.c \
     bionic/system_properties.cpp \
     bionic/tdestroy.cpp \
     bionic/termios.cpp \
-    bionic/thread_atexit.cpp \
+    bionic/thread_private.cpp \
     bionic/tmpfile.cpp \
     bionic/umount.cpp \
     bionic/unlink.cpp \
     bionic/utimes.cpp \
+    bionic/vdso.cpp \
     bionic/wait.cpp \
     bionic/wchar.cpp \
     bionic/wctype.cpp \
 
+libc_cxa_src_files := \
+    bionic/__cxa_guard.cpp \
+    bionic/__cxa_pure_virtual.cpp \
+    bionic/new.cpp \
+
 libc_upstream_freebsd_src_files := \
     upstream-freebsd/lib/libc/gen/ldexp.c \
     upstream-freebsd/lib/libc/gen/sleep.c \
     upstream-freebsd/lib/libc/gen/usleep.c \
-    upstream-freebsd/lib/libc/stdio/fclose.c \
-    upstream-freebsd/lib/libc/stdio/flags.c \
-    upstream-freebsd/lib/libc/stdio/fopen.c \
-    upstream-freebsd/lib/libc/stdio/makebuf.c \
-    upstream-freebsd/lib/libc/stdio/mktemp.c \
-    upstream-freebsd/lib/libc/stdio/setvbuf.c \
     upstream-freebsd/lib/libc/stdlib/abs.c \
     upstream-freebsd/lib/libc/stdlib/getopt_long.c \
     upstream-freebsd/lib/libc/stdlib/imaxabs.c \
@@ -251,25 +268,18 @@ libc_upstream_freebsd_src_files := \
     upstream-freebsd/lib/libc/string/wcstok.c \
     upstream-freebsd/lib/libc/string/wmemchr.c \
     upstream-freebsd/lib/libc/string/wmemcpy.c \
-    upstream-freebsd/lib/libc/string/wmemmove.c \
     upstream-freebsd/lib/libc/string/wmemset.c \
 
 libc_upstream_netbsd_src_files := \
-    upstream-netbsd/common/lib/libc/hash/sha1/sha1.c \
-    upstream-netbsd/common/lib/libc/inet/inet_addr.c \
+    upstream-netbsd/common/lib/libc/stdlib/random.c \
     upstream-netbsd/lib/libc/gen/ftw.c \
     upstream-netbsd/lib/libc/gen/nftw.c \
     upstream-netbsd/lib/libc/gen/nice.c \
     upstream-netbsd/lib/libc/gen/popen.c \
     upstream-netbsd/lib/libc/gen/psignal.c \
-    upstream-netbsd/lib/libc/gen/setjmperr.c \
     upstream-netbsd/lib/libc/gen/utime.c \
     upstream-netbsd/lib/libc/gen/utmp.c \
-    upstream-netbsd/lib/libc/inet/inet_ntoa.c \
-    upstream-netbsd/lib/libc/inet/inet_ntop.c \
-    upstream-netbsd/lib/libc/inet/inet_pton.c \
-    upstream-netbsd/lib/libc/isc/ev_streams.c \
-    upstream-netbsd/lib/libc/isc/ev_timers.c \
+    upstream-netbsd/lib/libc/inet/nsap_addr.c \
     upstream-netbsd/lib/libc/regex/regcomp.c \
     upstream-netbsd/lib/libc/regex/regerror.c \
     upstream-netbsd/lib/libc/regex/regexec.c \
@@ -278,26 +288,20 @@ libc_upstream_netbsd_src_files := \
     upstream-netbsd/lib/libc/stdlib/div.c \
     upstream-netbsd/lib/libc/stdlib/drand48.c \
     upstream-netbsd/lib/libc/stdlib/erand48.c \
-    upstream-netbsd/lib/libc/stdlib/exit.c \
     upstream-netbsd/lib/libc/stdlib/jrand48.c \
     upstream-netbsd/lib/libc/stdlib/ldiv.c \
     upstream-netbsd/lib/libc/stdlib/lldiv.c \
     upstream-netbsd/lib/libc/stdlib/lrand48.c \
-    upstream-netbsd/lib/libc/stdlib/lsearch.c \
     upstream-netbsd/lib/libc/stdlib/mrand48.c \
     upstream-netbsd/lib/libc/stdlib/nrand48.c \
     upstream-netbsd/lib/libc/stdlib/_rand48.c \
+    upstream-netbsd/lib/libc/stdlib/rand_r.c \
     upstream-netbsd/lib/libc/stdlib/seed48.c \
     upstream-netbsd/lib/libc/stdlib/srand48.c \
-    upstream-netbsd/lib/libc/stdlib/tdelete.c \
-    upstream-netbsd/lib/libc/stdlib/tfind.c \
-    upstream-netbsd/lib/libc/stdlib/tsearch.c \
     upstream-netbsd/lib/libc/string/memccpy.c \
     upstream-netbsd/lib/libc/string/strcasestr.c \
     upstream-netbsd/lib/libc/string/strcoll.c \
     upstream-netbsd/lib/libc/string/strxfrm.c \
-    upstream-netbsd/lib/libc/thread-stub/__isthreaded.c \
-    upstream-netbsd/lib/libc/unistd/killpg.c \
 
 libc_upstream_openbsd_gdtoa_src_files := \
     upstream-openbsd/android/gdtoa_support.cpp \
@@ -327,8 +331,14 @@ libc_upstream_openbsd_gdtoa_src_files_64 := \
     upstream-openbsd/lib/libc/gdtoa/strtorQ.c \
 
 libc_upstream_openbsd_src_files := \
+    upstream-openbsd/lib/libc/compat-43/killpg.c \
+    upstream-openbsd/lib/libc/crypt/arc4random.c \
+    upstream-openbsd/lib/libc/crypt/arc4random_uniform.c \
     upstream-openbsd/lib/libc/gen/alarm.c \
     upstream-openbsd/lib/libc/gen/ctype_.c \
+    upstream-openbsd/lib/libc/gen/daemon.c \
+    upstream-openbsd/lib/libc/gen/err.c \
+    upstream-openbsd/lib/libc/gen/errx.c \
     upstream-openbsd/lib/libc/gen/exec.c \
     upstream-openbsd/lib/libc/gen/fnmatch.c \
     upstream-openbsd/lib/libc/gen/ftok.c \
@@ -338,6 +348,12 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/gen/time.c \
     upstream-openbsd/lib/libc/gen/tolower_.c \
     upstream-openbsd/lib/libc/gen/toupper_.c \
+    upstream-openbsd/lib/libc/gen/verr.c \
+    upstream-openbsd/lib/libc/gen/verrx.c \
+    upstream-openbsd/lib/libc/gen/vwarn.c \
+    upstream-openbsd/lib/libc/gen/vwarnx.c \
+    upstream-openbsd/lib/libc/gen/warn.c \
+    upstream-openbsd/lib/libc/gen/warnx.c \
     upstream-openbsd/lib/libc/locale/btowc.c \
     upstream-openbsd/lib/libc/locale/mbrlen.c \
     upstream-openbsd/lib/libc/locale/mbstowcs.c \
@@ -356,8 +372,22 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/locale/wcsxfrm.c \
     upstream-openbsd/lib/libc/locale/wctob.c \
     upstream-openbsd/lib/libc/locale/wctomb.c \
+    upstream-openbsd/lib/libc/net/htonl.c \
+    upstream-openbsd/lib/libc/net/htons.c \
+    upstream-openbsd/lib/libc/net/inet_addr.c \
+    upstream-openbsd/lib/libc/net/inet_lnaof.c \
+    upstream-openbsd/lib/libc/net/inet_makeaddr.c \
+    upstream-openbsd/lib/libc/net/inet_netof.c \
+    upstream-openbsd/lib/libc/net/inet_network.c \
+    upstream-openbsd/lib/libc/net/inet_ntoa.c \
+    upstream-openbsd/lib/libc/net/inet_ntop.c \
+    upstream-openbsd/lib/libc/net/inet_pton.c \
+    upstream-openbsd/lib/libc/net/ntohl.c \
+    upstream-openbsd/lib/libc/net/ntohs.c \
     upstream-openbsd/lib/libc/stdio/asprintf.c \
     upstream-openbsd/lib/libc/stdio/clrerr.c \
+    upstream-openbsd/lib/libc/stdio/dprintf.c \
+    upstream-openbsd/lib/libc/stdio/fclose.c \
     upstream-openbsd/lib/libc/stdio/fdopen.c \
     upstream-openbsd/lib/libc/stdio/feof.c \
     upstream-openbsd/lib/libc/stdio/ferror.c \
@@ -369,6 +399,10 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/stdio/fgetwc.c \
     upstream-openbsd/lib/libc/stdio/fgetws.c \
     upstream-openbsd/lib/libc/stdio/fileno.c \
+    upstream-openbsd/lib/libc/stdio/findfp.c \
+    upstream-openbsd/lib/libc/stdio/flags.c \
+    upstream-openbsd/lib/libc/stdio/fmemopen.c \
+    upstream-openbsd/lib/libc/stdio/fopen.c \
     upstream-openbsd/lib/libc/stdio/fprintf.c \
     upstream-openbsd/lib/libc/stdio/fpurge.c \
     upstream-openbsd/lib/libc/stdio/fputc.c \
@@ -395,12 +429,15 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/stdio/gets.c \
     upstream-openbsd/lib/libc/stdio/getwc.c \
     upstream-openbsd/lib/libc/stdio/getwchar.c \
+    upstream-openbsd/lib/libc/stdio/makebuf.c \
+    upstream-openbsd/lib/libc/stdio/mktemp.c \
+    upstream-openbsd/lib/libc/stdio/open_memstream.c \
+    upstream-openbsd/lib/libc/stdio/open_wmemstream.c \
     upstream-openbsd/lib/libc/stdio/perror.c \
     upstream-openbsd/lib/libc/stdio/printf.c \
     upstream-openbsd/lib/libc/stdio/putc.c \
     upstream-openbsd/lib/libc/stdio/putchar.c \
     upstream-openbsd/lib/libc/stdio/puts.c \
-    upstream-openbsd/lib/libc/stdio/putw.c \
     upstream-openbsd/lib/libc/stdio/putwc.c \
     upstream-openbsd/lib/libc/stdio/putwchar.c \
     upstream-openbsd/lib/libc/stdio/refill.c \
@@ -410,6 +447,7 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/stdio/scanf.c \
     upstream-openbsd/lib/libc/stdio/setbuf.c \
     upstream-openbsd/lib/libc/stdio/setbuffer.c \
+    upstream-openbsd/lib/libc/stdio/setvbuf.c \
     upstream-openbsd/lib/libc/stdio/sscanf.c \
     upstream-openbsd/lib/libc/stdio/stdio.c \
     upstream-openbsd/lib/libc/stdio/swprintf.c \
@@ -419,6 +457,7 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/stdio/ungetc.c \
     upstream-openbsd/lib/libc/stdio/ungetwc.c \
     upstream-openbsd/lib/libc/stdio/vasprintf.c \
+    upstream-openbsd/lib/libc/stdio/vdprintf.c \
     upstream-openbsd/lib/libc/stdio/vfprintf.c \
     upstream-openbsd/lib/libc/stdio/vfscanf.c \
     upstream-openbsd/lib/libc/stdio/vfwprintf.c \
@@ -436,10 +475,15 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/stdio/wprintf.c \
     upstream-openbsd/lib/libc/stdio/wscanf.c \
     upstream-openbsd/lib/libc/stdio/wsetup.c \
+    upstream-openbsd/lib/libc/stdlib/atexit.c \
     upstream-openbsd/lib/libc/stdlib/atoi.c \
     upstream-openbsd/lib/libc/stdlib/atol.c \
     upstream-openbsd/lib/libc/stdlib/atoll.c \
+    upstream-openbsd/lib/libc/stdlib/exit.c \
     upstream-openbsd/lib/libc/stdlib/getenv.c \
+    upstream-openbsd/lib/libc/stdlib/insque.c \
+    upstream-openbsd/lib/libc/stdlib/lsearch.c \
+    upstream-openbsd/lib/libc/stdlib/remque.c \
     upstream-openbsd/lib/libc/stdlib/setenv.c \
     upstream-openbsd/lib/libc/stdlib/strtoimax.c \
     upstream-openbsd/lib/libc/stdlib/strtol.c \
@@ -448,8 +492,8 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/stdlib/strtoull.c \
     upstream-openbsd/lib/libc/stdlib/strtoumax.c \
     upstream-openbsd/lib/libc/stdlib/system.c \
-    upstream-openbsd/lib/libc/string/stpcpy.c \
-    upstream-openbsd/lib/libc/string/stpncpy.c \
+    upstream-openbsd/lib/libc/stdlib/tfind.c \
+    upstream-openbsd/lib/libc/stdlib/tsearch.c \
     upstream-openbsd/lib/libc/string/strcasecmp.c \
     upstream-openbsd/lib/libc/string/strcspn.c \
     upstream-openbsd/lib/libc/string/strdup.c \
@@ -461,7 +505,6 @@ libc_upstream_openbsd_src_files := \
     upstream-openbsd/lib/libc/string/strtok.c \
     upstream-openbsd/lib/libc/string/wcslcpy.c \
     upstream-openbsd/lib/libc/string/wcsstr.c \
-    upstream-openbsd/lib/libc/string/wcswcs.c \
     upstream-openbsd/lib/libc/string/wcswidth.c \
 
 libc_arch_static_src_files := \
@@ -471,18 +514,37 @@ libc_arch_static_src_files := \
 # ========================================================
 libc_common_cflags := \
     -D_LIBC=1 \
-    -Wall -Wextra \
+    -Wall -Wextra -Wunused \
+
+ifneq ($(TARGET_USES_LOGD),false)
+libc_common_cflags += -DTARGET_USES_LOGD
+endif
+
+use_clang := $(USE_CLANG_PLATFORM_BUILD)
+ifeq ($(use_clang),)
+  use_clang := false
+endif
 
 # Try to catch typical 32-bit assumptions that break with 64-bit pointers.
 libc_common_cflags += \
     -Werror=pointer-to-int-cast \
     -Werror=int-to-pointer-cast \
     -Werror=type-limits \
+    -Werror \
 
 ifeq ($(strip $(DEBUG_BIONIC_LIBC)),true)
   libc_common_cflags += -DDEBUG
 endif
 
+ifeq ($(MALLOC_IMPL),dlmalloc)
+  libc_common_cflags += -DUSE_DLMALLOC
+  libc_malloc_src := bionic/dlmalloc.c
+else
+  libc_common_cflags += -DUSE_JEMALLOC
+  libc_malloc_src := bionic/jemalloc_wrapper.cpp
+  libc_common_c_includes += external/jemalloc/include
+endif
+
 # To customize dlmalloc's alignment, set BOARD_MALLOC_ALIGNMENT in
 # the appropriate BoardConfig.mk file.
 #
@@ -507,8 +569,7 @@ libc_common_cppflags := \
 
 # Define some common includes
 # ========================================================
-libc_common_c_includes := \
-    $(LOCAL_PATH)/stdlib  \
+libc_common_c_includes += \
     $(LOCAL_PATH)/stdio   \
 
 # ========================================================
@@ -535,13 +596,16 @@ endef
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := bionic/__stack_chk_fail.cpp
-LOCAL_CFLAGS := $(libc_common_cflags) -fno-stack-protector -Werror
+LOCAL_CFLAGS := $(libc_common_cflags) -fno-stack-protector
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_MODULE := libc_stack_protector
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 include $(BUILD_STATIC_LIBRARY)
@@ -557,7 +621,9 @@ LOCAL_SRC_FILES := $(call all-c-files-under,tzcode)
 # tzcode doesn't include wcsftime, so we use the OpenBSD one.
 LOCAL_SRC_FILES += upstream-openbsd/lib/libc/time/wcsftime.c
 
-LOCAL_CFLAGS := $(libc_common_cflags)
+LOCAL_CFLAGS := $(libc_common_cflags) \
+    -fvisibility=hidden \
+
 # Don't use ridiculous amounts of stack.
 LOCAL_CFLAGS += -DALL_STATE
 # Include tzsetwall, timelocal, timegm, time2posix, and posix2time.
@@ -568,13 +634,18 @@ LOCAL_CFLAGS += -DTM_GMTOFF=tm_gmtoff
 LOCAL_CFLAGS += -DTZDIR=\"/system/usr/share/zoneinfo\"
 # Include timezone and daylight globals.
 LOCAL_CFLAGS += -DUSG_COMPAT=1
+LOCAL_CFLAGS += -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU
+LOCAL_CFLAGS += -Dlint
 
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes) $(LOCAL_PATH)/tzcode/
 LOCAL_MODULE := libc_tzcode
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 include $(BUILD_STATIC_LIBRARY)
@@ -586,21 +657,39 @@ include $(BUILD_STATIC_LIBRARY)
 
 include $(CLEAR_VARS)
 
-LOCAL_SRC_FILES := $(call all-c-files-under,dns)
-LOCAL_CFLAGS := \
+LOCAL_SRC_FILES := \
+    $(call all-c-files-under,dns) \
+    upstream-netbsd/lib/libc/isc/ev_streams.c \
+    upstream-netbsd/lib/libc/isc/ev_timers.c \
+    upstream-netbsd/lib/libc/resolv/mtctxres.c \
+
+# We use the OpenBSD res_random.
+LOCAL_CFLAGS += \
+    -Dres_randomid=__res_randomid
+LOCAL_SRC_FILES += \
+    upstream-openbsd/lib/libc/net/res_random.c \
+
+LOCAL_CFLAGS += \
     $(libc_common_cflags) \
     -DANDROID_CHANGES \
     -DINET6 \
+    -fvisibility=hidden \
+    -Wno-unused-parameter \
     -I$(LOCAL_PATH)/dns/include \
     -I$(LOCAL_PATH)/private \
     -I$(LOCAL_PATH)/upstream-netbsd/lib/libc/include \
-    -include upstream-netbsd/android/include/netbsd-compat.h
+    -I$(LOCAL_PATH)/upstream-netbsd/android/include \
+    -include netbsd-compat.h \
+
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_MODULE := libc_dns
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 include $(BUILD_STATIC_LIBRARY)
@@ -618,17 +707,23 @@ include $(CLEAR_VARS)
 LOCAL_SRC_FILES := $(libc_upstream_freebsd_src_files)
 LOCAL_CFLAGS := \
     $(libc_common_cflags) \
+    -Wno-sign-compare -Wno-uninitialized \
     -I$(LOCAL_PATH)/upstream-freebsd/android/include \
     -I$(LOCAL_PATH)/upstream-freebsd/lib/libc/include \
-    -include freebsd-compat.h
+    -include freebsd-compat.h \
+
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_MODULE := libc_freebsd
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
+$(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_freebsd_src_files))
 include $(BUILD_STATIC_LIBRARY)
 
 
@@ -644,18 +739,24 @@ include $(CLEAR_VARS)
 LOCAL_SRC_FILES := $(libc_upstream_netbsd_src_files)
 LOCAL_CFLAGS := \
     $(libc_common_cflags) \
+    -Wno-sign-compare -Wno-uninitialized \
     -DPOSIX_MISTAKE \
     -I$(LOCAL_PATH)/upstream-netbsd/android/include \
     -I$(LOCAL_PATH)/upstream-netbsd/lib/libc/include \
-    -include netbsd-compat.h
+    -include netbsd-compat.h \
+
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_MODULE := libc_netbsd
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
+$(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_netbsd_src_files))
 include $(BUILD_STATIC_LIBRARY)
 
 
@@ -669,20 +770,36 @@ include $(BUILD_STATIC_LIBRARY)
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := $(libc_upstream_openbsd_src_files)
+ifneq (,$(filter $(TARGET_ARCH),x86 x86_64))
+  # Clang has wrong long double size or LDBL_MANT_DIG, http://b/17163651.
+  LOCAL_CLANG := false
+else
+  LOCAL_CLANG := $(use_clang)
+endif
+
 LOCAL_CFLAGS := \
     $(libc_common_cflags) \
+    -Wno-missing-field-initializers \
+    -Wno-sign-compare \
+    -Wno-uninitialized \
+    -Wno-unused-parameter \
+    -I$(LOCAL_PATH)/private \
     -I$(LOCAL_PATH)/upstream-openbsd/android/include \
     -I$(LOCAL_PATH)/upstream-openbsd/lib/libc/include \
     -I$(LOCAL_PATH)/upstream-openbsd/lib/libc/gdtoa/ \
-    -include openbsd-compat.h
+    -include openbsd-compat.h \
+
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_MODULE := libc_openbsd
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
+$(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_openbsd_src_files))
 include $(BUILD_STATIC_LIBRARY)
 
 
@@ -697,9 +814,18 @@ include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES_32 := $(libc_upstream_openbsd_gdtoa_src_files_32)
 LOCAL_SRC_FILES_64 := $(libc_upstream_openbsd_gdtoa_src_files_64)
+ifneq (,$(filter $(TARGET_ARCH),x86 x86_64))
+  # Clang has wrong long double size or LDBL_MANT_DIG, http://b/17163651.
+  LOCAL_CLANG := false
+else
+  LOCAL_CLANG := $(use_clang)
+endif
+
 LOCAL_CFLAGS := \
     $(libc_common_cflags) \
+    -Wno-sign-compare -Wno-uninitialized \
     -fvisibility=hidden \
+    -I$(LOCAL_PATH)/private \
     -I$(LOCAL_PATH)/upstream-openbsd/android/include \
     -I$(LOCAL_PATH)/upstream-openbsd/lib/libc/include \
     -include openbsd-compat.h \
@@ -709,7 +835,9 @@ LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_MODULE := libc_gdtoa
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 include $(BUILD_STATIC_LIBRARY)
@@ -722,27 +850,52 @@ include $(BUILD_STATIC_LIBRARY)
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := $(libc_bionic_src_files)
-LOCAL_CFLAGS := $(libc_common_cflags) -Werror
+LOCAL_CFLAGS := $(libc_common_cflags) \
+    -Wframe-larger-than=2048 \
+
+ifeq ($(TARGET_ARCH),x86_64)
+  # Clang assembler has problem with ssse3-strcmp-slm.S, http://b/17302991
+  LOCAL_CLANG_ASFLAGS += -no-integrated-as
+endif
+
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
-LOCAL_C_INCLUDES := $(libc_common_c_includes)
+LOCAL_C_INCLUDES := $(libc_common_c_includes) bionic/libstdc++/include
 LOCAL_MODULE := libc_bionic
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
-
-# Set -DPTHREAD_DEBUG_ENABLED=true to enable support for pthread deadlock prediction.
-# Since this code is experimental it is disabled by default.
-LOCAL_CFLAGS += -DPTHREAD_DEBUG_ENABLED=false
-
-ifneq ($(TARGET_USES_LOGD),false)
-LOCAL_CFLAGS += -DTARGET_USES_LOGD
-endif
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 $(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_bionic_src_files))
 include $(BUILD_STATIC_LIBRARY)
 
 
+# ========================================================
+# libc_cxa.a - Things traditionally in libstdc++
+# ========================================================
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(libc_cxa_src_files)
+LOCAL_CFLAGS := $(libc_common_cflags) \
+    -fvisibility=hidden \
+
+LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
+LOCAL_CPPFLAGS := $(libc_common_cppflags)
+LOCAL_C_INCLUDES := $(libc_common_c_includes) bionic/libstdc++/include
+LOCAL_MODULE := libc_cxa
+LOCAL_CLANG := true # GCC refuses to hide new/delete
+LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
+LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
+
+include $(BUILD_STATIC_LIBRARY)
+
+
 # ========================================================
 # libc_syscalls.a
 # ========================================================
@@ -754,12 +907,35 @@ ifdef TARGET_2ND_ARCH
 LOCAL_SRC_FILES_$(TARGET_2ND_ARCH) := $(call all-S-files-under,arch-$(TARGET_2ND_ARCH)/syscalls)
 endif
 LOCAL_MODULE := libc_syscalls
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 include $(BUILD_STATIC_LIBRARY)
 
 
+# ========================================================
+# libc_aeabi.a
+# This is an LP32 ARM-only library that needs to be built with -fno-builtin
+# to avoid infinite recursion. For the other architectures we just build an
+# empty library to keep this makefile simple.
+# ========================================================
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES_arm := arch-arm/bionic/__aeabi.c
+LOCAL_MODULE := libc_aeabi
+LOCAL_CLANG := $(use_clang)
+LOCAL_CFLAGS := $(libc_common_cflags) -fno-builtin
+LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+LOCAL_CXX_STL := none
+LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
+
+include $(BUILD_STATIC_LIBRARY)
+
 # ========================================================
 # libc_common.a
 # ========================================================
@@ -772,22 +948,33 @@ LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_MODULE := libc_common
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
 LOCAL_WHOLE_STATIC_LIBRARIES := \
     libc_bionic \
+    libc_cxa \
     libc_dns \
     libc_freebsd \
     libc_gdtoa \
+    libc_malloc \
     libc_netbsd \
     libc_openbsd \
     libc_stack_protector \
     libc_syscalls \
     libc_tzcode \
 
+LOCAL_WHOLE_STATIC_LIBRARIES_arm := libc_aeabi
+
+ifneq ($(MALLOC_IMPL),dlmalloc)
+LOCAL_WHOLE_STATIC_LIBRARIES += libjemalloc
+endif
+
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
 
 # TODO: split out the asflags.
 LOCAL_ASFLAGS := $(LOCAL_CFLAGS)
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 $(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_common_src_files))
@@ -802,8 +989,8 @@ include $(BUILD_STATIC_LIBRARY)
 # This is a version of the static C library that does not
 # include malloc. It's useful in situations when the user wants
 # to provide their own malloc implementation, or wants to
-# explicitly disallow the use of the use of malloc,
-# such as in the dynamic loader.
+# explicitly disallow the use of malloc, such as in the
+# dynamic linker.
 
 include $(CLEAR_VARS)
 
@@ -814,20 +1001,44 @@ LOCAL_SRC_FILES := \
 
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_CFLAGS := $(libc_common_cflags) \
-                -DLIBC_STATIC
+    -DLIBC_STATIC \
+
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 
 LOCAL_MODULE := libc_nomalloc
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
 LOCAL_WHOLE_STATIC_LIBRARIES := libc_common
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 $(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_arch_static_src_files))
 include $(BUILD_STATIC_LIBRARY)
 
 
+# ========================================================
+# libc_malloc.a: the _prefixed_ malloc functions (like dlcalloc).
+# ========================================================
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := $(libc_malloc_src)
+LOCAL_CFLAGS := $(libc_common_cflags) \
+    -fvisibility=hidden \
+
+LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
+LOCAL_CPPFLAGS := $(libc_common_cppflags)
+LOCAL_C_INCLUDES := $(libc_common_c_includes)
+LOCAL_MODULE := libc_malloc
+LOCAL_CLANG := $(use_clang)
+LOCAL_CXX_STL := none
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
+LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
+include $(BUILD_STATIC_LIBRARY)
+
+
 # ========================================================
 # libc.a
 # ========================================================
@@ -836,19 +1047,22 @@ include $(CLEAR_VARS)
 LOCAL_SRC_FILES := \
     $(libc_arch_static_src_files) \
     $(libc_static_common_src_files) \
-    bionic/dlmalloc.c \
     bionic/malloc_debug_common.cpp \
     bionic/libc_init_static.cpp \
 
 LOCAL_CFLAGS := $(libc_common_cflags) \
-                -DLIBC_STATIC
+    -DLIBC_STATIC \
+
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 LOCAL_MODULE := libc
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
 LOCAL_WHOLE_STATIC_LIBRARIES := libc_common
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 $(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_arch_static_src_files))
@@ -864,18 +1078,15 @@ LOCAL_CFLAGS := $(libc_common_cflags)
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
-
 LOCAL_SRC_FILES := \
     $(libc_arch_dynamic_src_files) \
     $(libc_static_common_src_files) \
-    bionic/dlmalloc.c \
     bionic/malloc_debug_common.cpp \
-    bionic/debug_mapinfo.cpp \
-    bionic/debug_stacktrace.cpp \
-    bionic/pthread_debug.cpp \
     bionic/libc_init_dynamic.cpp \
+    bionic/NetdClient.cpp \
 
 LOCAL_MODULE := libc
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
 LOCAL_REQUIRED_MODULES := tzdata
 
@@ -893,8 +1104,16 @@ LOCAL_STRIP_MODULE := keep_symbols
 
 LOCAL_SHARED_LIBRARIES := libdl
 LOCAL_WHOLE_STATIC_LIBRARIES := libc_common
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
 
+# We'd really like to do this for all architectures, but since this wasn't done
+# before, these symbols must continue to be exported on LP32 for binary
+# compatibility.
+LOCAL_LDFLAGS_arm64 := -Wl,--exclude-libs,libgcc.a
+LOCAL_LDFLAGS_mips64 := -Wl,--exclude-libs,libgcc.a
+LOCAL_LDFLAGS_x86_64 := -Wl,--exclude-libs,libgcc.a
+
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 $(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_arch_dynamic_src_files))
 $(eval $(call patch-up-arch-specific-flags,LOCAL_SRC_FILES,libc_static_common_src_files))
@@ -905,6 +1124,7 @@ LOCAL_SRC_FILES_arm += \
     arch-common/bionic/crtbegin_so.c \
     arch-arm/bionic/atexit_legacy.c \
     arch-common/bionic/crtend_so.S
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 include $(BUILD_SHARED_LIBRARY)
 
@@ -922,30 +1142,36 @@ ifneq ($(TARGET_BUILD_VARIANT),user)
 # ========================================================
 include $(CLEAR_VARS)
 
-LOCAL_CFLAGS := \
-    $(libc_common_cflags) \
-    -DMALLOC_LEAK_CHECK
+LOCAL_CFLAGS := $(libc_common_cflags)
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 
-LOCAL_C_INCLUDES := $(libc_common_c_includes)
+# Make sure that unwind.h comes from libunwind.
+LOCAL_C_INCLUDES := \
+    $(libc_common_c_includes) \
 
 LOCAL_SRC_FILES := \
     bionic/debug_mapinfo.cpp \
     bionic/debug_stacktrace.cpp \
+    bionic/libc_logging.cpp \
     bionic/malloc_debug_leak.cpp \
     bionic/malloc_debug_check.cpp \
 
 LOCAL_MODULE := libc_malloc_debug_leak
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
 
 LOCAL_SHARED_LIBRARIES := libc libdl
-LOCAL_WHOLE_STATIC_LIBRARIES := libc_common
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
+# Only need this for arm since libc++ uses its own unwind code that
+# doesn't mix with the other default unwind code.
+LOCAL_STATIC_LIBRARIES_arm := libunwind_llvm
 LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
 
 # Don't install on release build
 LOCAL_MODULE_TAGS := eng debug
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 include $(BUILD_SHARED_LIBRARY)
@@ -958,30 +1184,70 @@ include $(CLEAR_VARS)
 
 LOCAL_CFLAGS := \
     $(libc_common_cflags) \
-    -DMALLOC_QEMU_INSTRUMENT
+    -DMALLOC_QEMU_INSTRUMENT \
+
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
 
 LOCAL_C_INCLUDES := $(libc_common_c_includes)
 
 LOCAL_SRC_FILES := \
-    bionic/malloc_debug_qemu.cpp
+    bionic/libc_logging.cpp \
+    bionic/malloc_debug_qemu.cpp \
 
 LOCAL_MODULE := libc_malloc_debug_qemu
+LOCAL_CLANG := $(use_clang)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(libc_common_additional_dependencies)
 
 LOCAL_SHARED_LIBRARIES := libc libdl
-LOCAL_WHOLE_STATIC_LIBRARIES := libc_common
+LOCAL_CXX_STL := none
 LOCAL_SYSTEM_SHARED_LIBRARIES :=
 
 # Don't install on release build
 LOCAL_MODULE_TAGS := eng debug
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
 
 $(eval $(call patch-up-arch-specific-flags,LOCAL_CFLAGS,libc_common_cflags))
 include $(BUILD_SHARED_LIBRARY)
 
 endif  #!user
 
+# ========================================================
+# libstdc++.so
+# ========================================================
+libstdcxx_common_src_files := \
+    bionic/__cxa_guard.cpp \
+    bionic/__cxa_pure_virtual.cpp \
+    bionic/new.cpp \
+    bionic/libc_logging.cpp \
+
+include $(CLEAR_VARS)
+LOCAL_C_INCLUDES := $(libc_common_c_includes) bionic/libstdc++/include
+LOCAL_CFLAGS := $(libc_common_cflags)
+LOCAL_CPPFLAGS := $(libc_common_cppflags)
+LOCAL_SRC_FILES := $(libstdcxx_common_src_files)
+LOCAL_MODULE:= libstdc++
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+LOCAL_CXX_STL := none
+LOCAL_SYSTEM_SHARED_LIBRARIES := libc
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
+include $(BUILD_SHARED_LIBRARY)
+
+# ========================================================
+# libstdc++.a
+# ========================================================
+include $(CLEAR_VARS)
+LOCAL_C_INCLUDES := $(libc_common_c_includes) bionic/libstdc++/include
+LOCAL_CFLAGS := $(libc_common_cflags)
+LOCAL_CPPFLAGS := $(libc_common_cppflags)
+LOCAL_SRC_FILES := $(libstdcxx_common_src_files)
+LOCAL_MODULE:= libstdc++
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+LOCAL_CXX_STL := none
+LOCAL_SYSTEM_SHARED_LIBRARIES := libc
+LOCAL_NATIVE_COVERAGE := $(bionic_coverage)
+include $(BUILD_STATIC_LIBRARY)
+
 
 # ========================================================
 include $(call all-makefiles-under,$(LOCAL_PATH))

libc/SYSCALLS.TXT

@@ -38,7 +38,6 @@ uid_t   getresuid:getresuid32(uid_t* ruid, uid_t* euid, uid_t* suid)   arm,x86
 uid_t   getresuid:getresuid(uid_t* ruid, uid_t* euid, uid_t* suid)     arm64,mips,mips64,x86_64
 gid_t   getresgid:getresgid32(gid_t* rgid, gid_t* egid, gid_t* sgid)   arm,x86
 gid_t   getresgid:getresgid(gid_t* rgid, gid_t* egid, gid_t* sgid)     arm64,mips,mips64,x86_64
-pid_t   gettid()                   all
 ssize_t readahead(int, off64_t, size_t)     all
 int     getgroups:getgroups32(int, gid_t*)    arm,x86
 int     getgroups:getgroups(int, gid_t*)      arm64,mips,mips64,x86_64
@@ -58,10 +57,8 @@ int     setresgid:setresgid32(gid_t, gid_t, gid_t)   arm,x86
 int     setresgid:setresgid(gid_t, gid_t, gid_t)     arm64,mips,mips64,x86_64
 void*   __brk:brk(void*)           all
 int     kill(pid_t, int)           all
-int     tkill(pid_t tid, int sig)  all
 int     tgkill(pid_t tgid, pid_t tid, int sig)  all
 int     __ptrace:ptrace(int request, int pid, void* addr, void* data)  all
-int     __set_thread_area:set_thread_area(void*  user_desc)  mips,mips64,x86
 
 # <sys/resource.h>
 int getrusage(int, struct rusage*)  all
@@ -84,9 +81,7 @@ pid_t   vfork(void)  arm
 int     setregid:setregid32(gid_t, gid_t)  arm,x86
 int     setregid:setregid(gid_t, gid_t)    arm64,mips,mips64,x86_64
 int     chroot(const char*)  all
-# IMPORTANT: Even though <sys/prctl.h> declares prctl(int, ...), the syscall stub must take 6 arguments
-#            to match the kernel implementation.
-int     prctl(int option, unsigned int arg2, unsigned int arg3, unsigned int arg4, unsigned int arg5) all
+int     prctl(int, unsigned long, unsigned long, unsigned long, unsigned long) all
 long    __arch_prctl:arch_prctl(int, unsigned long) x86_64
 int     capget(cap_user_header_t header, cap_user_data_t data) all
 int     capset(cap_user_header_t header, const cap_user_data_t data) all
@@ -101,7 +96,7 @@ ssize_t     pread64|pread(int, void*, size_t, off_t) arm64,mips64,x86_64
 ssize_t     pwrite64(int, void*, size_t, off64_t) arm,mips,x86
 ssize_t     pwrite64|pwrite(int, void*, size_t, off_t) arm64,mips64,x86_64
 int         close(int)                      all
-pid_t       getpid()    all
+pid_t       __getpid:getpid()  all
 int         munmap(void*, size_t)  all
 void*       mremap(void*, size_t, size_t, unsigned long)  all
 int         msync(const void*, size_t, int)    all
@@ -132,12 +127,7 @@ ssize_t     fgetxattr(int, const char*, void*, size_t) all
 ssize_t     flistxattr(int, char*, size_t) all
 int         fremovexattr(int, const char*) all
 
-# mips64 doesn't have getdents64 until 3.10 kernels.
-# We need this special-case hack as long as we need to support mips64 on older kernels.
-# The currently-available Debian qemu image is on a 3.2 kernel.
-int getdents:getdents64(unsigned int, struct dirent*, unsigned int)   arm,arm64,mips,x86,x86_64
-int __getdents64:getdents64(unsigned int, struct dirent*, unsigned int)   mips64
-int __getdents:getdents(unsigned int, void*, unsigned int)   mips64
+int __getdents64:getdents64(unsigned int, struct dirent*, unsigned int)   arm,arm64,mips,mips64,x86,x86_64
 
 int __openat:openat(int, const char*, int, mode_t) all
 int faccessat(int, const char*, int, int)  all
@@ -177,6 +167,12 @@ void* mmap|mmap64(void*, size_t, int, int, int, off_t)  arm64,mips64,x86_64
 int fallocate64:fallocate(int, int, off64_t, off64_t) arm,mips,x86
 int fallocate|fallocate64(int, int, off_t, off_t) arm64,mips64,x86_64
 
+# posix_fadvise64 is awkward: arm has shuffled arguments,
+# the POSIX functions don't set errno, and no architecture has posix_fadvise.
+int __arm_fadvise64_64:arm_fadvise64_64(int, int, off64_t, off64_t) arm
+int __fadvise64:fadvise64_64(int, off64_t, off64_t, int) x86
+int __fadvise64:fadvise64(int, off64_t, off64_t, int) arm64,mips,mips64,x86_64
+
 int __fstatfs64:fstatfs64(int, size_t, struct statfs*)  arm,mips,x86
 int fstatfs64|fstatfs:fstatfs(int, struct statfs*)  arm64,mips64,x86_64
 int __statfs64:statfs64(const char*, size_t, struct statfs*)  arm,mips,x86
@@ -203,14 +199,12 @@ int     swapon(const char*, int) all
 int     swapoff(const char*) all
 
 # time
-int           gettimeofday(struct timeval*, struct timezone*)       all
 int           settimeofday(const struct timeval*, const struct timezone*)   all
 clock_t       times(struct tms*)       all
 int           nanosleep(const struct timespec*, struct timespec*)   all
-int           clock_gettime(clockid_t clk_id, struct timespec* tp)    all
-int           clock_settime(clockid_t clk_id, const struct timespec* tp)  all
-int           clock_getres(clockid_t clk_id, struct timespec* res)   all
-int           clock_nanosleep(clockid_t clock_id, int flags, const struct timespec* req, struct timespec* rem)  all
+int           clock_settime(clockid_t, const struct timespec*)  all
+int           clock_getres(clockid_t, struct timespec*)   all
+int           __clock_nanosleep:clock_nanosleep(clockid_t, int, const struct timespec*, struct timespec*)  all
 int           getitimer(int, const struct itimerval*)   all
 int           setitimer(int, const struct itimerval*, struct itimerval*)  all
 int           __timer_create:timer_create(clockid_t clockid, struct sigevent* evp, __kernel_timer_t* timerid)    all
@@ -229,16 +223,15 @@ int     __rt_sigpending:rt_sigpending(sigset_t*, size_t)  all
 int     __rt_sigprocmask:rt_sigprocmask(int, const sigset_t*, sigset_t*, size_t)  all
 int     __rt_sigsuspend:rt_sigsuspend(const sigset_t*, size_t)  all
 int     __rt_sigtimedwait:rt_sigtimedwait(const sigset_t*, struct siginfo_t*, struct timespec_t*, size_t)  all
-int     signalfd4(int, const sigset_t*, size_t, int)  all
+int     __signalfd4:signalfd4(int, const sigset_t*, size_t, int)  all
 
 # sockets
-int           socket(int, int, int)              arm,arm64,mips,mips64,x86_64
+int           __socket:socket(int, int, int)              arm,arm64,mips,mips64,x86_64
 int           socketpair(int, int, int, int*)    arm,arm64,mips,mips64,x86_64
 int           bind(int, struct sockaddr*, int)  arm,arm64,mips,mips64,x86_64
-int           connect(int, struct sockaddr*, socklen_t)   arm,arm64,mips,mips64,x86_64
+int           __connect:connect(int, struct sockaddr*, socklen_t)   arm,arm64,mips,mips64,x86_64
 int           listen(int, int)                   arm,arm64,mips,mips64,x86_64
-int           accept(int, struct sockaddr*, socklen_t*)  arm,arm64,mips,mips64,x86_64
-int           accept4(int, struct sockaddr*, socklen_t*, int)  arm,arm64,mips,mips64,x86_64
+int           __accept4:accept4(int, struct sockaddr*, socklen_t*, int)  arm,arm64,mips,mips64,x86_64
 int           getsockname(int, struct sockaddr*, socklen_t*)  arm,arm64,mips,mips64,x86_64
 int           getpeername(int, struct sockaddr*, socklen_t*)  arm,arm64,mips,mips64,x86_64
 int           sendto(int, const void*, size_t, int, const struct sockaddr*, socklen_t)  arm,arm64,mips,mips64,x86_64
@@ -252,11 +245,10 @@ int           recvmmsg(int, struct mmsghdr*, unsigned int, int, const struct tim
 int           sendmmsg(int, struct mmsghdr*, unsigned int, int)   arm,arm64,mips,mips64,x86_64
 
 # sockets for x86. These are done as an "indexed" call to socketcall syscall.
-int           socket:socketcall:1(int, int, int) x86
+int           __socket:socketcall:1(int, int, int) x86
 int           bind:socketcall:2(int, struct sockaddr*, int)  x86
-int           connect:socketcall:3(int, struct sockaddr*, socklen_t)   x86
+int           __connect:socketcall:3(int, struct sockaddr*, socklen_t)   x86
 int           listen:socketcall:4(int, int)                   x86
-int           accept:socketcall:5(int, struct sockaddr*, socklen_t*)  x86
 int           getsockname:socketcall:6(int, struct sockaddr*, socklen_t*)  x86
 int           getpeername:socketcall:7(int, struct sockaddr*, socklen_t*)  x86
 int           socketpair:socketcall:8(int, int, int, int*)    x86
@@ -267,7 +259,7 @@ int           setsockopt:socketcall:14(int, int, int, const void*, socklen_t)  x
 int           getsockopt:socketcall:15(int, int, int, void*, socklen_t*)    x86
 int           sendmsg:socketcall:16(int, const struct msghdr*, unsigned int)  x86
 int           recvmsg:socketcall:17(int, struct msghdr*, unsigned int)   x86
-int           accept4:socketcall:18(int, struct sockaddr*, socklen_t*, int)  x86
+int           __accept4:socketcall:18(int, struct sockaddr*, socklen_t*, int)  x86
 int           recvmmsg:socketcall:19(int, struct mmsghdr*, unsigned int, int, const struct timespec*)   x86
 int           sendmmsg:socketcall:20(int, struct mmsghdr*, unsigned int, int)   x86
 
@@ -286,21 +278,19 @@ int unshare(int) all
 int __sched_getaffinity:sched_getaffinity(pid_t pid, size_t setsize, cpu_set_t* set)  all
 int __getcpu:getcpu(unsigned*, unsigned*, void*) all
 
-# io priorities
-int ioprio_set(int which, int who, int ioprio) all
-int ioprio_get(int which, int who) all
-
 # other
 int     uname(struct utsname*)  all
 mode_t  umask(mode_t)  all
 int     __reboot:reboot(int, int, int, void*)  all
-int     __syslog:syslog(int, char*, int)  all
 int     init_module(void*, unsigned long, const char*)  all
 int     delete_module(const char*, unsigned int)   all
 int     klogctl:syslog(int, char*, int)   all
 int     sysinfo(struct sysinfo*)  all
 int     personality(unsigned long)  all
-long    perf_event_open(struct perf_event_attr* attr_uptr, pid_t pid, int cpu, int group_fd, unsigned long flags) all
+
+ssize_t tee(int, int, size_t, unsigned int)  all
+ssize_t splice(int, off64_t*, int, off64_t*, size_t, unsigned int)  all
+ssize_t vmsplice(int, const struct iovec*, size_t, unsigned int)  all
 
 int epoll_create1(int)  all
 int epoll_ctl(int, int op, int, struct epoll_event*)  all
@@ -311,8 +301,6 @@ int eventfd:eventfd2(unsigned int, int)  all
 void _exit|_Exit:exit_group(int)  all
 void __exit:exit(int)  all
 
-int futex(void*, int, int, void*, void*, int)  all
-
 int inotify_init1(int)  all
 int inotify_add_watch(int, const char*, unsigned int)  all
 int inotify_rm_watch(int, unsigned int)  all
@@ -322,6 +310,9 @@ int __ppoll:ppoll(pollfd*, unsigned int, timespec*, const sigset_t*, size_t)  al
 
 int __set_tid_address:set_tid_address(int*)  all
 
+int setfsgid(gid_t)  all
+int setfsuid(uid_t)  all
+
 pid_t wait4(pid_t, int*, int, struct rusage*)  all
 int __waitid:waitid(int, pid_t, struct siginfo_t*, int, void*)  all
 
@@ -330,4 +321,14 @@ int     __set_tls:__ARM_NR_set_tls(void*)                                 arm
 int     cacheflush:__ARM_NR_cacheflush(long start, long end, long flags)  arm
 
 # MIPS-specific
-int     _flush_cache:cacheflush(char* addr, const int nbytes, const int op) mips,mips64
+int     _flush_cache:cacheflush(char* addr, const int nbytes, const int op) mips
+int     __set_tls:set_thread_area(void*) mips,mips64
+
+# x86-specific
+int     __set_thread_area:set_thread_area(void*) x86
+
+# vdso stuff.
+int clock_gettime(clockid_t, timespec*)                 arm,mips,mips64,x86
+int __clock_gettime:clock_gettime(clockid_t, timespec*) arm64,x86_64
+int gettimeofday(timeval*, timezone*)                   arm,mips,mips64,x86
+int __gettimeofday:gettimeofday(timeval*, timezone*)    arm64,x86_64

libc/arch-arm/arm.mk

@@ -1,23 +1,35 @@
-# arm specific configs
+# 32-bit arm.
 
-# These are used by the 32-bit targets, but not the 64-bit ones.
-libc_common_src_files_arm := \
+#
+# Various kinds of LP32 cruft.
+#
+
+libc_bionic_src_files_arm += \
+    bionic/mmap.cpp \
+
+libc_common_src_files_arm += \
     bionic/legacy_32_bit_support.cpp \
     bionic/ndk_cruft.cpp \
     bionic/time64.c \
 
-# These are shared by all the 32-bit targets, but not the 64-bit ones.
-libc_bionic_src_files_arm := \
-    bionic/mmap.cpp
+libc_netbsd_src_files_arm += \
+    upstream-netbsd/common/lib/libc/hash/sha1/sha1.c \
 
-libc_common_src_files_arm += \
-    bionic/index.cpp \
+libc_openbsd_src_files_arm += \
+    upstream-openbsd/lib/libc/stdio/putw.c \
+
+#
+# Default implementations of functions that are commonly optimized.
+#
+
+libc_bionic_src_files_arm += \
     bionic/memchr.c \
-    bionic/memmove.c.arm \
     bionic/memrchr.c \
     bionic/strchr.cpp \
     bionic/strnlen.c \
     bionic/strrchr.cpp \
+
+libc_freebsd_src_files_arm += \
     upstream-freebsd/lib/libc/string/wcscat.c \
     upstream-freebsd/lib/libc/string/wcschr.c \
     upstream-freebsd/lib/libc/string/wcscmp.c \
@@ -25,38 +37,29 @@ libc_common_src_files_arm += \
     upstream-freebsd/lib/libc/string/wcslen.c \
     upstream-freebsd/lib/libc/string/wcsrchr.c \
     upstream-freebsd/lib/libc/string/wmemcmp.c \
+    upstream-freebsd/lib/libc/string/wmemmove.c \
+
+libc_openbsd_src_files_arm += \
     upstream-openbsd/lib/libc/string/bcopy.c \
+    upstream-openbsd/lib/libc/string/stpncpy.c \
     upstream-openbsd/lib/libc/string/strlcat.c \
     upstream-openbsd/lib/libc/string/strlcpy.c \
     upstream-openbsd/lib/libc/string/strncat.c \
     upstream-openbsd/lib/libc/string/strncmp.c \
     upstream-openbsd/lib/libc/string/strncpy.c \
 
-# The C++ fortify function implementations for which there is an
-# arm assembler version.
 #
-# Fortify implementations of libc functions.
-# libc_common_src_files_arm +=
-#    bionic/__memcpy_chk.cpp \
-#    bionic/__memset_chk.cpp \
-#    bionic/__strcpy_chk.cpp \
-#    bionic/__strcat_chk.cpp \
+# Inherently architecture-specific code.
+#
 
-libc_common_cflags_arm := -DSOFTFLOAT
-
-##########################################
-### CPU specific source files
 libc_bionic_src_files_arm += \
     arch-arm/bionic/abort_arm.S \
     arch-arm/bionic/atomics_arm.c \
     arch-arm/bionic/__bionic_clone.S \
-    arch-arm/bionic/eabi.c \
     arch-arm/bionic/_exit_with_stack_teardown.S \
-    arch-arm/bionic/futex_arm.S \
-    arch-arm/bionic/__get_sp.S \
     arch-arm/bionic/libgcc_compat.c \
-    arch-arm/bionic/memcmp16.S \
     arch-arm/bionic/memcmp.S \
+    arch-arm/bionic/__restore.S \
     arch-arm/bionic/_setjmp.S \
     arch-arm/bionic/setjmp.S \
     arch-arm/bionic/sigsetjmp.S \

libc/arch-arm/bionic/__aeabi.c

@@ -25,10 +25,22 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
+
+#if defined(__clang__)
+// clang interprets -fno-builtin more loosely than you might expect,
+// and thinks it's okay to still substitute builtins as long as they're
+// named __aeabi_* rather than __builtin_*, which causes infinite
+// recursion if we have the fortified memcpy visible in this file.
+#undef _FORTIFY_SOURCE
+#endif
+
 #include <stddef.h>
 #include <string.h>
 
-extern int  __cxa_atexit(void (*)(void*), void*, void* );
+extern int __cxa_atexit(void (*)(void*), void*, void*);
+
+// All of these are weak symbols to avoid multiple definition errors when
+// linking with libstdc++-v3 or compiler-rt.
 
 /* The "C++ ABI for ARM" document states that static C++ constructors,
  * which are called from the .init_array, should manually call
@@ -38,66 +50,64 @@ extern int  __cxa_atexit(void (*)(void*), void*, void* );
  * variable from the shared object that contains the constructor/destructor
  */
 
-/* Make this a weak symbol to avoid a multiple definition error when linking
- * with libstdc++-v3.  */
 int __attribute__((weak))
-__aeabi_atexit (void *object, void (*destructor) (void *), void *dso_handle)
-{
+__aeabi_atexit(void *object, void (*destructor) (void *), void *dso_handle) {
     return __cxa_atexit(destructor, object, dso_handle);
 }
 
 
-void __aeabi_memcpy8(void *dest, const void *src, size_t n) {
+void __attribute__((weak))
+__aeabi_memcpy8(void *dest, const void *src, size_t n) {
     memcpy(dest, src, n);
 }
 
-void __aeabi_memcpy4(void *dest, const void *src, size_t n) {
+void __attribute__((weak)) __aeabi_memcpy4(void *dest, const void *src, size_t n) {
     memcpy(dest, src, n);
 }
 
-void __aeabi_memcpy(void *dest, const void *src, size_t n) {
+void __attribute__((weak)) __aeabi_memcpy(void *dest, const void *src, size_t n) {
     memcpy(dest, src, n);
 }
 
 
-void __aeabi_memmove8(void *dest, const void *src, size_t n) {
+void __attribute__((weak)) __aeabi_memmove8(void *dest, const void *src, size_t n) {
     memmove(dest, src, n);
 }
 
-void __aeabi_memmove4(void *dest, const void *src, size_t n) {
+void __attribute__((weak)) __aeabi_memmove4(void *dest, const void *src, size_t n) {
     memmove(dest, src, n);
 }
 
-void __aeabi_memmove(void *dest, const void *src, size_t n) {
+void __attribute__((weak)) __aeabi_memmove(void *dest, const void *src, size_t n) {
     memmove(dest, src, n);
 }
 
 /*
- * __aeabi_memset has the order of its second and third arguments reversed. 
+ * __aeabi_memset has the order of its second and third arguments reversed.
  *  This allows __aeabi_memclr to tail-call __aeabi_memset
  */
- 
-void __aeabi_memset8(void *dest, size_t n, int c) {
+
+void __attribute__((weak)) __aeabi_memset8(void *dest, size_t n, int c) {
     memset(dest, c, n);
 }
 
-void __aeabi_memset4(void *dest, size_t n, int c) {
+void __attribute__((weak)) __aeabi_memset4(void *dest, size_t n, int c) {
     memset(dest, c, n);
 }
 
-void __aeabi_memset(void *dest, size_t n, int c) {
+void __attribute__((weak)) __aeabi_memset(void *dest, size_t n, int c) {
     memset(dest, c, n);
 }
 
 
-void __aeabi_memclr8(void *dest, size_t n) {
+void __attribute__((weak)) __aeabi_memclr8(void *dest, size_t n) {
     __aeabi_memset8(dest, n, 0);
 }
 
-void __aeabi_memclr4(void *dest, size_t n) {
+void __attribute__((weak)) __aeabi_memclr4(void *dest, size_t n) {
     __aeabi_memset4(dest, n, 0);
 }
 
-void __aeabi_memclr(void *dest, size_t n) {
+void __attribute__((weak)) __aeabi_memclr(void *dest, size_t n) {
     __aeabi_memset(dest, n, 0);
 }

libc/arch-arm/bionic/__bionic_clone.S

@@ -54,20 +54,16 @@ ENTRY(__bionic_clone)
 
     # In the parent, reload saved registers then either return or set errno.
     ldmfd   sp!, {r4, r5, r6, r7}
-    .cfi_def_cfa_offset 0
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 
 1:  # The child.
-    # Re-add the unwind directives that were reset from above.
-    .cfi_def_cfa_offset 16
-    .cfi_rel_offset r4, 0
-    .cfi_rel_offset r5, 4
-    .cfi_rel_offset r6, 8
-    .cfi_rel_offset r7, 12
+    # Setting lr to 0 will make the unwinder stop at __start_thread
+    mov    lr, #0
     ldr    r0, [sp, #-4]
     ldr    r1, [sp, #-8]
-    b      __bionic_clone_entry
+    b      __start_thread
 END(__bionic_clone)
+.hidden __bionic_clone

libc/arch-arm/bionic/__restore.S

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 The Android Open Source Project
+ * Copyright (C) 2014 The Android Open Source Project
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -28,59 +28,34 @@
 
 #include <private/bionic_asm.h>
 
-#define FUTEX_WAIT 0
-#define FUTEX_WAKE 1
+// gdb is smart enough to unwind through signal frames with just the regular
+// CFI information but libgcc and libunwind both need extra help. We do this
+// by using .fnstart/.fnend and inserting a nop before both __restore and
+// __restore_rt (but covered by the .fnstart/.fnend) so that although they're
+// not inside the functions from objdump's point of view, an unwinder that
+// blindly looks at the previous instruction (but is then smart enough to check
+// the DWARF information to find out where it landed) gets the right answer.
 
-// int __futex_syscall4(volatile void* ftx, int op, int val, const struct timespec* timeout)
-ENTRY(__futex_syscall4)
-  stp x29, x30, [sp, #-16]!
-  mov x29, sp
+// We need to place .fnstart ourselves (but we may as well keep the free .fnend).
+#undef __bionic_asm_custom_entry
+#define __bionic_asm_custom_entry(f)
 
-  str x8, [sp, #-16]!
-  mov x8, __NR_futex
-  svc #0
-  ldr x8, [sp], #16
+  .fnstart
+  .save {r0-r15}
+  .pad #32
+  nop
+ENTRY_PRIVATE(__restore)
+  // This function must have exactly this instruction sequence.
+  mov r7, #__NR_sigreturn
+  swi #0
+END(__restore)
 
-  ldp x29, x30, [sp], #16
-  ret
-END(__futex_syscall4)
-
-// int __futex_syscall3(volatile void* ftx, int op, int count)
-ENTRY(__futex_syscall3)
-  b __futex_syscall4
-END(__futex_syscall3)
-
-// int __futex_wait(volatile void* ftx, int val, const struct timespec* timeout)
-ENTRY(__futex_wait)
-  stp x29, x30, [sp, #-16]!
-  mov x29, sp
-
-  mov x3, x2
-  mov x2, x1
-  mov x1, #FUTEX_WAIT
-
-  str x8, [sp, #-16]!
-  mov x8, __NR_futex
-  svc #0
-  ldr x8, [sp], #16
-
-  ldp x29, x30, [sp], #16
-  ret
-END(__futex_wait)
-
-// int __futex_wake(volatile void* ftx, int count)
-ENTRY(__futex_wake)
-  stp x29, x30, [sp, #-16]!
-  mov x29, sp
-
-  mov x2, x1
-  mov x1, #FUTEX_WAKE
-
-  str x8, [sp, #-16]!
-  mov x8, __NR_futex
-  svc #0
-  ldr x8, [sp], #16
-
-  ldp x29, x30, [sp], #16
-  ret
-END(__futex_wake)
+  .fnstart
+  .save {r0-r15}
+  .pad #160
+  nop
+ENTRY_PRIVATE(__restore_rt)
+  // This function must have exactly this instruction sequence.
+  mov r7, #__NR_rt_sigreturn
+  swi #0
+END(__restore_rt)

libc/arch-arm/bionic/_exit_with_stack_teardown.S

@@ -29,7 +29,7 @@
 #include <private/bionic_asm.h>
 
 // void _exit_with_stack_teardown(void* stackBase, size_t stackSize)
-ENTRY(_exit_with_stack_teardown)
+ENTRY_PRIVATE(_exit_with_stack_teardown)
   ldr r7, =__NR_munmap
   swi #0
   // If munmap failed, we ignore the failure and exit anyway.

libc/arch-arm/bionic/_setjmp.S

@@ -107,7 +107,7 @@ ENTRY(_longjmp)
 
 	/* validation failed, die die die. */
 botch:
-	bl	PIC_SYM(longjmperror, PLT)
-	bl	PIC_SYM(abort, PLT)
+	bl	longjmperror
+	bl	abort
 	b	. - 8		/* Cannot get here */
 END(_longjmp)

libc/arch-arm/bionic/abort_arm.S

@@ -40,5 +40,5 @@ ENTRY(abort)
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r3, 0
     .cfi_rel_offset r14, 4
-    bl      PIC_SYM(__libc_android_abort, PLT)
+    bl      __libc_android_abort
 END(abort)

libc/arch-arm/bionic/futex_arm.S

@@ -1,69 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <private/bionic_asm.h>
-
-#define FUTEX_WAIT 0
-#define FUTEX_WAKE 1
-
-// int __futex_syscall3(volatile void* ftx, int op, int count)
-ENTRY(__futex_syscall3)
-    mov     ip, r7
-    ldr     r7, =__NR_futex
-    swi     #0
-    mov     r7, ip
-    bx      lr
-END(__futex_syscall3)
-
-// int __futex_syscall4(volatile void* ftx, int op, int val, const struct timespec* timeout)
-ENTRY(__futex_syscall4)
-    b __futex_syscall3
-END(__futex_syscall4)
-
-// int __futex_wait(volatile void* ftx, int val, const struct timespec* timeout)
-ENTRY(__futex_wait)
-    mov     ip, r7
-    mov     r3, r2
-    mov     r2, r1
-    mov     r1, #FUTEX_WAIT
-    ldr     r7, =__NR_futex
-    swi     #0
-    mov     r7, ip
-    bx      lr
-END(__futex_wait)
-
-// int __futex_wake(volatile void* ftx, int count)
-ENTRY(__futex_wake)
-    mov     ip, r7
-    mov     r2, r1
-    mov     r1, #FUTEX_WAKE
-    ldr     r7, =__NR_futex
-    swi     #0
-    mov     r7, ip
-    bx      lr
-END(__futex_wake)

libc/arch-arm/bionic/memcmp16.S

@@ -1,234 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <machine/cpu-features.h>
-#include <private/bionic_asm.h>
-
-/*
- * Optimized memcmp16() for ARM9.
- * This would not be optimal on XScale or ARM11, where more prefetching
- * and use of pld will be needed.
- * The 2 major optimzations here are
- * (1) The main loop compares 16 bytes at a time
- * (2) The loads are scheduled in a way they won't stall
- */
-
-ENTRY(__memcmp16)
-        pld         [r0, #0]
-        pld         [r1, #0]
-
-        /* take of the case where length is nul or the buffers are the same */
-        cmp         r0, r1
-        cmpne       r2, #0
-        moveq       r0, #0
-        bxeq        lr
-
-        /* since r0 hold the result, move the first source
-         * pointer somewhere else
-         */
-
-        mov         r3, r0
-
-         /* make sure we have at least 12 words, this simplify things below
-          * and avoid some overhead for small blocks
-          */
-
-        cmp         r2, #12
-        bpl         0f
-
-        /* small blocks (less then 12 words) */
-        pld         [r0, #32]
-        pld         [r1, #32]
-
-1:      ldrh        r0, [r3], #2
-        ldrh        ip, [r1], #2
-        subs        r0, r0, ip
-        bxne        lr
-        subs        r2, r2, #1
-        bne         1b
-        bx          lr
-
-
-        /* save registers */
-0:      stmfd       sp!, {r4, lr}
-        .cfi_def_cfa_offset 8
-        .cfi_rel_offset r4, 0
-        .cfi_rel_offset lr, 4
-
-        /* align first pointer to word boundary */
-        tst         r3, #2
-        beq         0f
-
-        ldrh        r0, [r3], #2
-        ldrh        ip, [r1], #2
-        sub         r2, r2, #1
-        subs        r0, r0, ip
-        /* restore registers and return */
-        ldmnefd     sp!, {r4, lr}
-        bxne        lr
-
-
-0:      /* here the first pointer is aligned, and we have at least 3 words
-         * to process.
-         */
-
-        /* see if the pointers are congruent */
-        eor         r0, r3, r1
-        ands        r0, r0, #2
-        bne         5f
-
-        /* congruent case, 16 half-words per iteration
-         * We need to make sure there are at least 16+2 words left
-         * because we effectively read ahead one long word, and we could
-         * read past the buffer (and segfault) if we're not careful.
-         */
-
-        ldr         ip, [r1]
-        subs        r2, r2, #(16 + 2)
-        bmi         1f
-
-0:
-        pld         [r3, #64]
-        pld         [r1, #64]
-        ldr         r0, [r3], #4
-        ldr         lr, [r1, #4]!
-        eors        r0, r0, ip
-        ldreq       r0, [r3], #4
-        ldreq       ip, [r1, #4]!
-        eoreqs      r0, r0, lr
-        ldreq       r0, [r3], #4
-        ldreq       lr, [r1, #4]!
-        eoreqs      r0, r0, ip
-        ldreq       r0, [r3], #4
-        ldreq       ip, [r1, #4]!
-        eoreqs      r0, r0, lr
-        ldreq       r0, [r3], #4
-        ldreq       lr, [r1, #4]!
-        eoreqs      r0, r0, ip
-        ldreq       r0, [r3], #4
-        ldreq       ip, [r1, #4]!
-        eoreqs      r0, r0, lr
-        ldreq       r0, [r3], #4
-        ldreq       lr, [r1, #4]!
-        eoreqs      r0, r0, ip
-        ldreq       r0, [r3], #4
-        ldreq       ip, [r1, #4]!
-        eoreqs      r0, r0, lr
-        bne         2f
-        subs        r2, r2, #16
-        bhs         0b
-
-        /* do we have at least 2 words left? */
-1:      adds        r2, r2, #(16 - 2 + 2)
-        bmi         4f
-
-        /* finish off 2 words at a time */
-3:      ldr         r0, [r3], #4
-        ldr         ip, [r1], #4
-        eors        r0, r0, ip
-        bne         2f
-        subs        r2, r2, #2
-        bhs         3b
-
-        /* are we done? */
-4:      adds        r2, r2, #2
-        bne         8f
-        /* restore registers and return */
-        mov         r0, #0
-        ldmfd       sp!, {r4, lr}
-        bx          lr
-
-2:      /* the last 2 words are different, restart them */
-        ldrh        r0, [r3, #-4]
-        ldrh        ip, [r1, #-4]
-        subs        r0, r0, ip
-        ldreqh      r0, [r3, #-2]
-        ldreqh      ip, [r1, #-2]
-        subeqs      r0, r0, ip
-        /* restore registers and return */
-        ldmfd       sp!, {r4, lr}
-        bx          lr
-
-        /* process the last few words */
-8:      ldrh        r0, [r3], #2
-        ldrh        ip, [r1], #2
-        subs        r0, r0, ip
-        bne         9f
-        subs        r2, r2, #1
-        bne         8b
-
-9:      /* restore registers and return */
-        ldmfd       sp!, {r4, lr}
-        bx          lr
-
-
-5:      /*************** non-congruent case ***************/
-
-        /* align the unaligned pointer */
-        bic         r1, r1, #3
-        ldr         lr, [r1], #4
-        sub         r2, r2, #8
-
-6:
-        pld         [r3, #64]
-        pld         [r1, #64]
-        mov         ip, lr, lsr #16
-        ldr         lr, [r1], #4
-        ldr         r0, [r3], #4
-        orr         ip, ip, lr, lsl #16
-        eors        r0, r0, ip
-        moveq       ip, lr, lsr #16
-        ldreq       lr, [r1], #4
-        ldreq       r0, [r3], #4
-        orreq       ip, ip, lr, lsl #16
-        eoreqs      r0, r0, ip
-        moveq       ip, lr, lsr #16
-        ldreq       lr, [r1], #4
-        ldreq       r0, [r3], #4
-        orreq       ip, ip, lr, lsl #16
-        eoreqs      r0, r0, ip
-        moveq       ip, lr, lsr #16
-        ldreq       lr, [r1], #4
-        ldreq       r0, [r3], #4
-        orreq       ip, ip, lr, lsl #16
-        eoreqs      r0, r0, ip
-        bne         7f
-        subs        r2, r2, #8
-        bhs         6b
-        sub         r1, r1, #2
-        /* are we done? */
-        adds        r2, r2, #8
-        moveq       r0, #0
-        beq         9b
-        /* finish off the remaining bytes */
-        b           8b
-
-7:      /* fix up the 2 pointers and fallthrough... */
-        sub         r1, r1, #2
-        b           2b
-END(__memcmp16)

libc/arch-arm/bionic/setjmp.S

@@ -56,7 +56,7 @@ ENTRY(setjmp)
 	.cfi_rel_offset r14, 4
 	mov	r0, #0x00000000
 
-	bl	PIC_SYM(sigblock, PLT)
+	bl	sigblock
 	mov	r1, r0
 
 	ldmfd	sp!, {r0, r14}
@@ -108,7 +108,7 @@ ENTRY(longjmp)
 	.cfi_adjust_cfa_offset 4
 
 	mov	r0, r2
-	bl	PIC_SYM(sigsetmask, PLT)
+	bl	sigsetmask
 
 	add	sp, sp, #4	/* unalign the stack */
 	.cfi_adjust_cfa_offset -4
@@ -147,7 +147,7 @@ ENTRY(longjmp)
 
 	/* validation failed, die die die. */
 botch:
-	bl	PIC_SYM(longjmperror, PLT)
-	bl	PIC_SYM(abort, PLT)
+	bl	longjmperror
+	bl	abort
 	b	. - 8		/* Cannot get here */
 END(longjmp)

libc/arch-arm/bionic/sigsetjmp.S

@@ -33,8 +33,6 @@
  * SUCH DAMAGE.
  */
 
-#define _ALIGN_TEXT .align 0
-
 #include <private/bionic_asm.h>
 #include <machine/setjmp.h>
 
@@ -50,8 +48,8 @@
 
 ENTRY(sigsetjmp)
 	teq	r1, #0
-	beq	PIC_SYM(_setjmp, PLT)
-	b	PIC_SYM(setjmp, PLT)
+	beq	_setjmp
+	b	setjmp
 END(sigsetjmp)
 
 .L_setjmp_magic:
@@ -61,6 +59,6 @@ ENTRY(siglongjmp)
 	ldr	r2, .L_setjmp_magic
 	ldr	r3, [r0]
 	teq	r2, r3
-	beq	PIC_SYM(_longjmp, PLT)
-	b	PIC_SYM(longjmp, PLT)
+	beq	_longjmp
+	b	longjmp
 END(siglongjmp)

libc/arch-arm/bionic/syscall.S

@@ -47,5 +47,5 @@ ENTRY(syscall)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(syscall)

libc/arch-arm/cortex-a15/bionic/__strcat_chk.S

@@ -40,12 +40,10 @@
 ENTRY(__strcat_chk)
     pld     [r0, #0]
     push    {r0, lr}
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4
     push    {r4, r5}
-    .save   {r4, r5}
     .cfi_adjust_cfa_offset 8
     .cfi_rel_offset r4, 0
     .cfi_rel_offset r5, 4
@@ -195,9 +193,6 @@ END(__strcat_chk)
 #include "memcpy_base.S"
 
 ENTRY_PRIVATE(__strcat_chk_failed)
-    .save   {r0, lr}
-    .save   {r4, r5}
-
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4

libc/arch-arm/cortex-a15/bionic/__strcpy_chk.S

@@ -39,7 +39,6 @@
 ENTRY(__strcpy_chk)
     pld     [r0, #0]
     push    {r0, lr}
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4
@@ -161,7 +160,6 @@ END(__strcpy_chk)
 #include "memcpy_base.S"
 
 ENTRY_PRIVATE(__strcpy_chk_failed)
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4

libc/arch-arm/cortex-a15/bionic/memcpy.S

@@ -72,7 +72,6 @@ END(__memcpy_chk)
 ENTRY(memcpy)
         pld     [r1, #64]
         push    {r0, lr}
-        .save   {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4
@@ -85,7 +84,6 @@ END(memcpy)
 ENTRY_PRIVATE(__memcpy_chk_fail)
         // Preserve lr for backtrace.
         push    {lr}
-        .save   {lr}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset lr, 0
 

libc/arch-arm/cortex-a15/bionic/memcpy_base.S

@@ -54,7 +54,6 @@
  */
 
 ENTRY_PRIVATE(MEMCPY_BASE)
-        .save   {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4
@@ -172,7 +171,6 @@ ENTRY_PRIVATE(MEMCPY_BASE)
 END(MEMCPY_BASE)
 
 ENTRY_PRIVATE(MEMCPY_BASE_ALIGNED)
-        .save   {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4
@@ -181,17 +179,14 @@ ENTRY_PRIVATE(MEMCPY_BASE_ALIGNED)
         // i.e., not keeping the stack looking like users expect
         // (highest numbered register at highest address).
         strd    r4, r5, [sp, #-8]!
-        .save   {r4, r5}
         .cfi_adjust_cfa_offset 8
         .cfi_rel_offset r4, 0
         .cfi_rel_offset r5, 4
         strd    r6, r7, [sp, #-8]!
-        .save   {r6, r7}
         .cfi_adjust_cfa_offset 8
         .cfi_rel_offset r6, 0
         .cfi_rel_offset r7, 0
         strd    r8, r9, [sp, #-8]!
-        .save   {r8, r9}
         .cfi_adjust_cfa_offset 8
         .cfi_rel_offset r8, 0
         .cfi_rel_offset r9, 4

libc/arch-arm/cortex-a15/bionic/memset.S

@@ -44,7 +44,6 @@ ENTRY(__memset_chk)
         bls         .L_done
 
         // Preserve lr for backtrace.
-        .save       {lr}
         push        {lr}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset lr, 0
@@ -68,7 +67,6 @@ ENTRY(bzero)
 END(bzero)
 
 ENTRY(memset)
-        .save       {r0}
         stmfd       sp!, {r0}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset r0, 0

libc/arch-arm/cortex-a15/bionic/stpcpy.S

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 The Android Open Source Project
+ * Copyright (C) 2014 The Android Open Source Project
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,8 +26,5 @@
  * SUCH DAMAGE.
  */
 
-#include <string.h>
-
-void bzero(void* s, size_t n) {
-  memset(s, '\0', n);
-}
+#define STPCPY
+#include "string_copy.S"

libc/arch-arm/cortex-a15/bionic/strcmp.S

@@ -168,7 +168,6 @@ ENTRY(strcmp)
         bne     .L_do_align
 
         /* Fast path.  */
-        .save   {r4-r7}
         init
 
 .L_doubleword_aligned:

libc/arch-arm/cortex-a15/bionic/strcpy.S

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 The Android Open Source Project
+ * Copyright (C) 2014 The Android Open Source Project
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -25,427 +25,6 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
-/*
- * Copyright (c) 2013 ARM Ltd
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the company may not be used to endorse or promote
- *    products derived from this software without specific prior written
- *    permission.
- *
- * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
 
-#include <private/bionic_asm.h>
-
-    .syntax unified
-
-    .thumb
-    .thumb_func
-
-    .macro m_push
-    push    {r0, r4, r5, lr}
-    .endm // m_push
-
-    .macro m_pop
-    pop     {r0, r4, r5, pc}
-    .endm // m_pop
-
-    .macro m_copy_byte reg, cmd, label
-    ldrb    \reg, [r1], #1
-    strb    \reg, [r0], #1
-    \cmd    \reg, \label
-    .endm // m_copy_byte
-
-ENTRY(strcpy)
-    // For short copies, hard-code checking the first 8 bytes since this
-    // new code doesn't win until after about 8 bytes.
-    m_push
-    m_copy_byte reg=r2, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r3, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r4, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r5, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r2, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r3, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r4, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r5, cmd=cbnz, label=strcpy_continue
-
-strcpy_finish:
-    m_pop
-
-strcpy_continue:
-    pld     [r1, #0]
-    ands    r3, r0, #7
-    beq     strcpy_check_src_align
-
-    // Align to a double word (64 bits).
-    rsb     r3, r3, #8
-    lsls    ip, r3, #31
-    beq     strcpy_align_to_32
-
-    ldrb    r2, [r1], #1
-    strb    r2, [r0], #1
-    cbz     r2, strcpy_complete
-
-strcpy_align_to_32:
-    bcc     strcpy_align_to_64
-
-    ldrb    r2, [r1], #1
-    strb    r2, [r0], #1
-    cbz     r2, strcpy_complete
-    ldrb    r2, [r1], #1
-    strb    r2, [r0], #1
-    cbz     r2, strcpy_complete
-
-strcpy_align_to_64:
-    tst     r3, #4
-    beq     strcpy_check_src_align
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-    str     r2, [r0], #4
-
-strcpy_check_src_align:
-    // At this point dst is aligned to a double word, check if src
-    // is also aligned to a double word.
-    ands    r3, r1, #7
-    bne     strcpy_unaligned_copy
-
-    .p2align 2
-strcpy_mainloop:
-    ldrd    r2, r3, [r1], #8
-
-    pld     [r1, #64]
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    strd    r2, r3, [r0], #8
-    b       strcpy_mainloop
-
-strcpy_complete:
-    m_pop
-
-strcpy_zero_in_first_register:
-    lsls    lr, ip, #17
-    bne     strcpy_copy1byte
-    bcs     strcpy_copy2bytes
-    lsls    ip, ip, #1
-    bne     strcpy_copy3bytes
-
-strcpy_copy4bytes:
-    // Copy 4 bytes to the destiniation.
-    str     r2, [r0]
-    m_pop
-
-strcpy_copy1byte:
-    strb    r2, [r0]
-    m_pop
-
-strcpy_copy2bytes:
-    strh    r2, [r0]
-    m_pop
-
-strcpy_copy3bytes:
-    strh    r2, [r0], #2
-    lsr     r2, #16
-    strb    r2, [r0]
-    m_pop
-
-strcpy_zero_in_second_register:
-    lsls    lr, ip, #17
-    bne     strcpy_copy5bytes
-    bcs     strcpy_copy6bytes
-    lsls    ip, ip, #1
-    bne     strcpy_copy7bytes
-
-    // Copy 8 bytes to the destination.
-    strd    r2, r3, [r0]
-    m_pop
-
-strcpy_copy5bytes:
-    str     r2, [r0], #4
-    strb    r3, [r0]
-    m_pop
-
-strcpy_copy6bytes:
-    str     r2, [r0], #4
-    strh    r3, [r0]
-    m_pop
-
-strcpy_copy7bytes:
-    str     r2, [r0], #4
-    strh    r3, [r0], #2
-    lsr     r3, #16
-    strb    r3, [r0]
-    m_pop
-
-strcpy_unaligned_copy:
-    // Dst is aligned to a double word, while src is at an unknown alignment.
-    // There are 7 different versions of the unaligned copy code
-    // to prevent overreading the src. The mainloop of every single version
-    // will store 64 bits per loop. The difference is how much of src can
-    // be read without potentially crossing a page boundary.
-    tbb     [pc, r3]
-strcpy_unaligned_branchtable:
-    .byte 0
-    .byte ((strcpy_unalign7 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign6 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign5 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign4 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign3 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign2 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign1 - strcpy_unaligned_branchtable)/2)
-
-    .p2align 2
-    // Can read 7 bytes before possibly crossing a page.
-strcpy_unalign7:
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    ldrb    r3, [r1]
-    cbz     r3, strcpy_unalign7_copy5bytes
-    ldrb    r4, [r1, #1]
-    cbz     r4, strcpy_unalign7_copy6bytes
-    ldrb    r5, [r1, #2]
-    cbz     r5, strcpy_unalign7_copy7bytes
-
-    ldr     r3, [r1], #4
-    pld     [r1, #64]
-
-    lsrs    ip, r3, #24
-    strd    r2, r3, [r0], #8
-    beq     strcpy_unalign_return
-    b       strcpy_unalign7
-
-strcpy_unalign7_copy5bytes:
-    str     r2, [r0], #4
-    strb    r3, [r0]
-strcpy_unalign_return:
-    m_pop
-
-strcpy_unalign7_copy6bytes:
-    str     r2, [r0], #4
-    strb    r3, [r0], #1
-    strb    r4, [r0], #1
-    m_pop
-
-strcpy_unalign7_copy7bytes:
-    str     r2, [r0], #4
-    strb    r3, [r0], #1
-    strb    r4, [r0], #1
-    strb    r5, [r0], #1
-    m_pop
-
-    .p2align 2
-    // Can read 6 bytes before possibly crossing a page.
-strcpy_unalign6:
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    ldrb    r4, [r1]
-    cbz     r4, strcpy_unalign_copy5bytes
-    ldrb    r5, [r1, #1]
-    cbz     r5, strcpy_unalign_copy6bytes
-
-    ldr     r3, [r1], #4
-    pld     [r1, #64]
-
-    tst     r3, #0xff0000
-    beq     strcpy_copy7bytes
-    lsrs    ip, r3, #24
-    strd    r2, r3, [r0], #8
-    beq     strcpy_unalign_return
-    b       strcpy_unalign6
-
-    .p2align 2
-    // Can read 5 bytes before possibly crossing a page.
-strcpy_unalign5:
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    ldrb    r4, [r1]
-    cbz     r4, strcpy_unalign_copy5bytes
-
-    ldr     r3, [r1], #4
-
-    pld     [r1, #64]
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    strd    r2, r3, [r0], #8
-    b       strcpy_unalign5
-
-strcpy_unalign_copy5bytes:
-    str     r2, [r0], #4
-    strb    r4, [r0]
-    m_pop
-
-strcpy_unalign_copy6bytes:
-    str     r2, [r0], #4
-    strb    r4, [r0], #1
-    strb    r5, [r0]
-    m_pop
-
-    .p2align 2
-    // Can read 4 bytes before possibly crossing a page.
-strcpy_unalign4:
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    ldr     r3, [r1], #4
-    pld     [r1, #64]
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    strd    r2, r3, [r0], #8
-    b       strcpy_unalign4
-
-    .p2align 2
-    // Can read 3 bytes before possibly crossing a page.
-strcpy_unalign3:
-    ldrb    r2, [r1]
-    cbz     r2, strcpy_unalign3_copy1byte
-    ldrb    r3, [r1, #1]
-    cbz     r3, strcpy_unalign3_copy2bytes
-    ldrb    r4, [r1, #2]
-    cbz     r4, strcpy_unalign3_copy3bytes
-
-    ldr     r2, [r1], #4
-    ldr     r3, [r1], #4
-
-    pld     [r1, #64]
-
-    lsrs    lr, r2, #24
-    beq     strcpy_copy4bytes
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    strd    r2, r3, [r0], #8
-    b       strcpy_unalign3
-
-strcpy_unalign3_copy1byte:
-    strb    r2, [r0]
-    m_pop
-
-strcpy_unalign3_copy2bytes:
-    strb    r2, [r0], #1
-    strb    r3, [r0]
-    m_pop
-
-strcpy_unalign3_copy3bytes:
-    strb    r2, [r0], #1
-    strb    r3, [r0], #1
-    strb    r4, [r0]
-    m_pop
-
-    .p2align 2
-    // Can read 2 bytes before possibly crossing a page.
-strcpy_unalign2:
-    ldrb    r2, [r1]
-    cbz     r2, strcpy_unalign_copy1byte
-    ldrb    r4, [r1, #1]
-    cbz     r4, strcpy_unalign_copy2bytes
-
-    ldr     r2, [r1], #4
-    ldr     r3, [r1], #4
-    pld     [r1, #64]
-
-    tst     r2, #0xff0000
-    beq     strcpy_copy3bytes
-    lsrs    ip, r2, #24
-    beq     strcpy_copy4bytes
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    strd    r2, r3, [r0], #8
-    b       strcpy_unalign2
-
-    .p2align 2
-    // Can read 1 byte before possibly crossing a page.
-strcpy_unalign1:
-    ldrb    r2, [r1]
-    cbz     r2, strcpy_unalign_copy1byte
-
-    ldr     r2, [r1], #4
-    ldr     r3, [r1], #4
-
-    pld     [r1, #64]
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    strd    r2, r3, [r0], #8
-    b       strcpy_unalign1
-
-strcpy_unalign_copy1byte:
-    strb    r2, [r0]
-    m_pop
-
-strcpy_unalign_copy2bytes:
-    strb    r2, [r0], #1
-    strb    r4, [r0]
-    m_pop
-END(strcpy)
+#define STRCPY
+#include "string_copy.S"

libc/arch-arm/cortex-a15/bionic/string_copy.S

@@ -0,0 +1,513 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/*
+ * Copyright (c) 2013 ARM Ltd
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the company may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if !defined(STPCPY) && !defined(STRCPY)
+#error "Either STPCPY or STRCPY must be defined."
+#endif
+
+#include <private/bionic_asm.h>
+
+    .syntax unified
+
+    .thumb
+    .thumb_func
+
+#if defined(STPCPY)
+    .macro m_push
+    push    {r4, r5, lr}
+    .cfi_def_cfa_offset 12
+    .cfi_rel_offset r4, 0
+    .cfi_rel_offset r5, 4
+    .cfi_rel_offset lr, 8
+    .endm // m_push
+#else
+    .macro m_push
+    push    {r0, r4, r5, lr}
+    .cfi_def_cfa_offset 16
+    .cfi_rel_offset r0, 0
+    .cfi_rel_offset r4, 4
+    .cfi_rel_offset r5, 8
+    .cfi_rel_offset lr, 12
+    .endm // m_push
+#endif
+
+#if defined(STPCPY)
+    .macro m_pop
+    pop     {r4, r5, pc}
+    .endm // m_pop
+#else
+    .macro m_pop
+    pop     {r0, r4, r5, pc}
+    .endm // m_pop
+#endif
+
+    .macro m_copy_byte reg, cmd, label
+    ldrb    \reg, [r1], #1
+    strb    \reg, [r0], #1
+    \cmd    \reg, \label
+    .endm // m_copy_byte
+
+#if defined(STPCPY)
+ENTRY(stpcpy)
+#else
+ENTRY(strcpy)
+#endif
+    // For short copies, hard-code checking the first 8 bytes since this
+    // new code doesn't win until after about 8 bytes.
+    m_push
+    m_copy_byte reg=r2, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r3, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r4, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r5, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r2, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r3, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r4, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r5, cmd=cbnz, label=.Lstringcopy_continue
+
+.Lstringcopy_finish:
+#if defined(STPCPY)
+    sub     r0, r0, #1
+#endif
+    m_pop
+
+.Lstringcopy_continue:
+    pld     [r1, #0]
+    ands    r3, r0, #7
+    beq     .Lstringcopy_check_src_align
+
+    // Align to a double word (64 bits).
+    rsb     r3, r3, #8
+    lsls    ip, r3, #31
+    beq     .Lstringcopy_align_to_32
+
+    ldrb    r2, [r1], #1
+    strb    r2, [r0], #1
+    cbz     r2, .Lstringcopy_complete
+
+.Lstringcopy_align_to_32:
+    bcc     .Lstringcopy_align_to_64
+
+    ldrb    r2, [r1], #1
+    strb    r2, [r0], #1
+    cbz     r2, .Lstringcopy_complete
+    ldrb    r2, [r1], #1
+    strb    r2, [r0], #1
+    cbz     r2, .Lstringcopy_complete
+
+.Lstringcopy_align_to_64:
+    tst     r3, #4
+    beq     .Lstringcopy_check_src_align
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+    str     r2, [r0], #4
+
+.Lstringcopy_check_src_align:
+    // At this point dst is aligned to a double word, check if src
+    // is also aligned to a double word.
+    ands    r3, r1, #7
+    bne     .Lstringcopy_unaligned_copy
+
+    .p2align 2
+.Lstringcopy_mainloop:
+    ldrd    r2, r3, [r1], #8
+
+    pld     [r1, #64]
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    strd    r2, r3, [r0], #8
+    b       .Lstringcopy_mainloop
+
+.Lstringcopy_complete:
+#if defined(STPCPY)
+    sub     r0, r0, #1
+#endif
+    m_pop
+
+.Lstringcopy_zero_in_first_register:
+    lsls    lr, ip, #17
+    bne     .Lstringcopy_copy1byte
+    bcs     .Lstringcopy_copy2bytes
+    lsls    ip, ip, #1
+    bne     .Lstringcopy_copy3bytes
+
+.Lstringcopy_copy4bytes:
+    // Copy 4 bytes to the destiniation.
+#if defined(STPCPY)
+    str     r2, [r0], #3
+#else
+    str     r2, [r0]
+#endif
+    m_pop
+
+.Lstringcopy_copy1byte:
+    strb    r2, [r0]
+    m_pop
+
+.Lstringcopy_copy2bytes:
+#if defined(STPCPY)
+    strh    r2, [r0], #1
+#else
+    strh    r2, [r0]
+#endif
+    m_pop
+
+.Lstringcopy_copy3bytes:
+    strh    r2, [r0], #2
+    lsr     r2, #16
+    strb    r2, [r0]
+    m_pop
+
+.Lstringcopy_zero_in_second_register:
+    lsls    lr, ip, #17
+    bne     .Lstringcopy_copy5bytes
+    bcs     .Lstringcopy_copy6bytes
+    lsls    ip, ip, #1
+    bne     .Lstringcopy_copy7bytes
+
+    // Copy 8 bytes to the destination.
+    strd    r2, r3, [r0]
+#if defined(STPCPY)
+    add     r0, r0, #7
+#endif
+    m_pop
+
+.Lstringcopy_copy5bytes:
+    str     r2, [r0], #4
+    strb    r3, [r0]
+    m_pop
+
+.Lstringcopy_copy6bytes:
+    str     r2, [r0], #4
+#if defined(STPCPY)
+    strh    r3, [r0], #1
+#else
+    strh    r3, [r0]
+#endif
+    m_pop
+
+.Lstringcopy_copy7bytes:
+    str     r2, [r0], #4
+    strh    r3, [r0], #2
+    lsr     r3, #16
+    strb    r3, [r0]
+    m_pop
+
+.Lstringcopy_unaligned_copy:
+    // Dst is aligned to a double word, while src is at an unknown alignment.
+    // There are 7 different versions of the unaligned copy code
+    // to prevent overreading the src. The mainloop of every single version
+    // will store 64 bits per loop. The difference is how much of src can
+    // be read without potentially crossing a page boundary.
+    tbb     [pc, r3]
+.Lstringcopy_unaligned_branchtable:
+    .byte 0
+    .byte ((.Lstringcopy_unalign7 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign6 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign5 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign4 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign3 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign2 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign1 - .Lstringcopy_unaligned_branchtable)/2)
+
+    .p2align 2
+    // Can read 7 bytes before possibly crossing a page.
+.Lstringcopy_unalign7:
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    ldrb    r3, [r1]
+    cbz     r3, .Lstringcopy_unalign7_copy5bytes
+    ldrb    r4, [r1, #1]
+    cbz     r4, .Lstringcopy_unalign7_copy6bytes
+    ldrb    r5, [r1, #2]
+    cbz     r5, .Lstringcopy_unalign7_copy7bytes
+
+    ldr     r3, [r1], #4
+    pld     [r1, #64]
+
+    lsrs    ip, r3, #24
+    strd    r2, r3, [r0], #8
+#if defined(STPCPY)
+    beq     .Lstringcopy_finish
+#else
+    beq     .Lstringcopy_unalign_return
+#endif
+    b       .Lstringcopy_unalign7
+
+.Lstringcopy_unalign7_copy5bytes:
+    str     r2, [r0], #4
+    strb    r3, [r0]
+.Lstringcopy_unalign_return:
+    m_pop
+
+.Lstringcopy_unalign7_copy6bytes:
+    str     r2, [r0], #4
+    strb    r3, [r0], #1
+    strb    r4, [r0]
+    m_pop
+
+.Lstringcopy_unalign7_copy7bytes:
+    str     r2, [r0], #4
+    strb    r3, [r0], #1
+    strb    r4, [r0], #1
+    strb    r5, [r0]
+    m_pop
+
+    .p2align 2
+    // Can read 6 bytes before possibly crossing a page.
+.Lstringcopy_unalign6:
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    ldrb    r4, [r1]
+    cbz     r4, .Lstringcopy_unalign_copy5bytes
+    ldrb    r5, [r1, #1]
+    cbz     r5, .Lstringcopy_unalign_copy6bytes
+
+    ldr     r3, [r1], #4
+    pld     [r1, #64]
+
+    tst     r3, #0xff0000
+    beq     .Lstringcopy_copy7bytes
+    lsrs    ip, r3, #24
+    strd    r2, r3, [r0], #8
+#if defined(STPCPY)
+    beq     .Lstringcopy_finish
+#else
+    beq     .Lstringcopy_unalign_return
+#endif
+    b       .Lstringcopy_unalign6
+
+    .p2align 2
+    // Can read 5 bytes before possibly crossing a page.
+.Lstringcopy_unalign5:
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    ldrb    r4, [r1]
+    cbz     r4, .Lstringcopy_unalign_copy5bytes
+
+    ldr     r3, [r1], #4
+
+    pld     [r1, #64]
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    strd    r2, r3, [r0], #8
+    b       .Lstringcopy_unalign5
+
+.Lstringcopy_unalign_copy5bytes:
+    str     r2, [r0], #4
+    strb    r4, [r0]
+    m_pop
+
+.Lstringcopy_unalign_copy6bytes:
+    str     r2, [r0], #4
+    strb    r4, [r0], #1
+    strb    r5, [r0]
+    m_pop
+
+    .p2align 2
+    // Can read 4 bytes before possibly crossing a page.
+.Lstringcopy_unalign4:
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    ldr     r3, [r1], #4
+    pld     [r1, #64]
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    strd    r2, r3, [r0], #8
+    b       .Lstringcopy_unalign4
+
+    .p2align 2
+    // Can read 3 bytes before possibly crossing a page.
+.Lstringcopy_unalign3:
+    ldrb    r2, [r1]
+    cbz     r2, .Lstringcopy_unalign3_copy1byte
+    ldrb    r3, [r1, #1]
+    cbz     r3, .Lstringcopy_unalign3_copy2bytes
+    ldrb    r4, [r1, #2]
+    cbz     r4, .Lstringcopy_unalign3_copy3bytes
+
+    ldr     r2, [r1], #4
+    ldr     r3, [r1], #4
+
+    pld     [r1, #64]
+
+    lsrs    lr, r2, #24
+    beq     .Lstringcopy_copy4bytes
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    strd    r2, r3, [r0], #8
+    b       .Lstringcopy_unalign3
+
+.Lstringcopy_unalign3_copy1byte:
+    strb    r2, [r0]
+    m_pop
+
+.Lstringcopy_unalign3_copy2bytes:
+    strb    r2, [r0], #1
+    strb    r3, [r0]
+    m_pop
+
+.Lstringcopy_unalign3_copy3bytes:
+    strb    r2, [r0], #1
+    strb    r3, [r0], #1
+    strb    r4, [r0]
+    m_pop
+
+    .p2align 2
+    // Can read 2 bytes before possibly crossing a page.
+.Lstringcopy_unalign2:
+    ldrb    r2, [r1]
+    cbz     r2, .Lstringcopy_unalign_copy1byte
+    ldrb    r4, [r1, #1]
+    cbz     r4, .Lstringcopy_unalign_copy2bytes
+
+    ldr     r2, [r1], #4
+    ldr     r3, [r1], #4
+    pld     [r1, #64]
+
+    tst     r2, #0xff0000
+    beq     .Lstringcopy_copy3bytes
+    lsrs    ip, r2, #24
+    beq     .Lstringcopy_copy4bytes
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    strd    r2, r3, [r0], #8
+    b       .Lstringcopy_unalign2
+
+    .p2align 2
+    // Can read 1 byte before possibly crossing a page.
+.Lstringcopy_unalign1:
+    ldrb    r2, [r1]
+    cbz     r2, .Lstringcopy_unalign_copy1byte
+
+    ldr     r2, [r1], #4
+    ldr     r3, [r1], #4
+
+    pld     [r1, #64]
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    strd    r2, r3, [r0], #8
+    b       .Lstringcopy_unalign1
+
+.Lstringcopy_unalign_copy1byte:
+    strb    r2, [r0]
+    m_pop
+
+.Lstringcopy_unalign_copy2bytes:
+    strb    r2, [r0], #1
+    strb    r4, [r0]
+    m_pop
+#if defined(STPCPY)
+END(stpcpy)
+#else
+END(strcpy)
+#endif

libc/arch-arm/cortex-a15/cortex-a15.mk

@@ -1,9 +1,11 @@
 libc_bionic_src_files_arm += \
     arch-arm/cortex-a15/bionic/memcpy.S \
     arch-arm/cortex-a15/bionic/memset.S \
+    arch-arm/cortex-a15/bionic/stpcpy.S \
     arch-arm/cortex-a15/bionic/strcat.S \
+    arch-arm/cortex-a15/bionic/__strcat_chk.S \
     arch-arm/cortex-a15/bionic/strcmp.S \
     arch-arm/cortex-a15/bionic/strcpy.S \
-    arch-arm/cortex-a15/bionic/strlen.S \
-    arch-arm/cortex-a15/bionic/__strcat_chk.S \
     arch-arm/cortex-a15/bionic/__strcpy_chk.S \
+    arch-arm/cortex-a15/bionic/strlen.S \
+    bionic/memmove.c \

libc/arch-arm/cortex-a9/bionic/__strcat_chk.S

@@ -40,12 +40,10 @@
 ENTRY(__strcat_chk)
     pld     [r0, #0]
     push    {r0, lr}
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4
     push    {r4, r5}
-    .save   {r4, r5}
     .cfi_adjust_cfa_offset 8
     .cfi_rel_offset r4, 0
     .cfi_rel_offset r5, 4
@@ -199,8 +197,6 @@ END(__strcat_chk)
 #include "memcpy_base.S"
 
 ENTRY_PRIVATE(__strcat_chk_fail)
-    .save   {r0, lr}
-    .save   {r4, r5}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4

libc/arch-arm/cortex-a9/bionic/__strcpy_chk.S

@@ -39,7 +39,6 @@
 ENTRY(__strcpy_chk)
     pld     [r0, #0]
     push    {r0, lr}
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4
@@ -165,7 +164,6 @@ END(__strcpy_chk)
 #include "memcpy_base.S"
 
 ENTRY_PRIVATE(__strcpy_chk_fail)
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4

libc/arch-arm/cortex-a9/bionic/memcpy.S

@@ -50,7 +50,6 @@ END(__memcpy_chk)
 ENTRY(memcpy)
         pld     [r1, #0]
         stmfd   sp!, {r0, lr}
-        .save   {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4
@@ -64,7 +63,6 @@ END(memcpy)
 ENTRY_PRIVATE(__memcpy_chk_fail)
         // Preserve lr for backtrace.
         push    {lr}
-        .save   {lr}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset lr, 0
 

libc/arch-arm/cortex-a9/bionic/memcpy_base.S

@@ -33,7 +33,6 @@
  */
 
 ENTRY_PRIVATE(MEMCPY_BASE)
-        .save       {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4
@@ -139,14 +138,12 @@ ENTRY_PRIVATE(MEMCPY_BASE)
 END(MEMCPY_BASE)
 
 ENTRY_PRIVATE(MEMCPY_BASE_ALIGNED)
-        .save       {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4
 
         /* Simple arm-only copy loop to handle aligned copy operations */
         stmfd       sp!, {r4-r8}
-        .save       {r4-r8}
         .cfi_adjust_cfa_offset 20
         .cfi_rel_offset r4, 0
         .cfi_rel_offset r5, 4

libc/arch-arm/cortex-a9/bionic/memset.S

@@ -42,7 +42,6 @@ ENTRY(__memset_chk)
 
         // Preserve lr for backtrace.
         push        {lr}
-        .save       {lr}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset lr, 0
 
@@ -72,7 +71,6 @@ ENTRY(memset)
         bhi         __memset_large_copy
 
         stmfd       sp!, {r0}
-        .save       {r0}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset r0, 0
 
@@ -114,7 +112,6 @@ ENTRY_PRIVATE(__memset_large_copy)
          * offset = (4-(src&3))&3 = -src & 3
          */
         stmfd       sp!, {r0, r4-r7, lr}
-        .save       {r0, r4-r7, lr}
         .cfi_def_cfa_offset 24
         .cfi_rel_offset r0, 0
         .cfi_rel_offset r4, 4

libc/arch-arm/cortex-a9/bionic/stpcpy.S

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008 The Android Open Source Project
+ * Copyright (C) 2014 The Android Open Source Project
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,9 +26,5 @@
  * SUCH DAMAGE.
  */
 
-#include <private/bionic_asm.h>
-
-ENTRY(__get_sp)
-  mov r0, sp
-  bx lr
-END(__get_sp)
+#define STPCPY
+#include "string_copy.S"

libc/arch-arm/cortex-a9/bionic/strcmp.S

@@ -168,7 +168,6 @@ ENTRY(strcmp)
         bne     .L_do_align
 
         /* Fast path.  */
-        .save   {r4-r7}
         init
 
 .L_doubleword_aligned:

libc/arch-arm/cortex-a9/bionic/strcpy.S

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 The Android Open Source Project
+ * Copyright (C) 2014 The Android Open Source Project
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -25,432 +25,6 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
-/*
- * Copyright (c) 2013 ARM Ltd
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the company may not be used to endorse or promote
- *    products derived from this software without specific prior written
- *    permission.
- *
- * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
 
-#include <private/bionic_asm.h>
-
-    .syntax unified
-
-    .thumb
-    .thumb_func
-
-    .macro m_push
-    push    {r0, r4, r5, lr}
-    .endm // m_push
-
-    .macro m_ret inst
-    \inst   {r0, r4, r5, pc}
-    .endm // m_ret
-
-    .macro m_copy_byte reg, cmd, label
-    ldrb    \reg, [r1], #1
-    strb    \reg, [r0], #1
-    \cmd    \reg, \label
-    .endm // m_copy_byte
-
-ENTRY(strcpy)
-    // Unroll the first 8 bytes that will be copied.
-    m_push
-    m_copy_byte reg=r2, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r3, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r4, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r5, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r2, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r3, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r4, cmd=cbz, label=strcpy_finish
-    m_copy_byte reg=r5, cmd=cbnz, label=strcpy_continue
-
-strcpy_finish:
-    m_ret   inst=pop
-
-strcpy_continue:
-    pld     [r1, #0]
-    ands    r3, r0, #7
-    bne     strcpy_align_dst
-
-strcpy_check_src_align:
-    // At this point dst is aligned to a double word, check if src
-    // is also aligned to a double word.
-    ands    r3, r1, #7
-    bne     strcpy_unaligned_copy
-
-    .p2align 2
-strcpy_mainloop:
-    ldmia   r1!, {r2, r3}
-
-    pld     [r1, #64]
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    stmia   r0!, {r2, r3}
-    b       strcpy_mainloop
-
-strcpy_zero_in_first_register:
-    lsls    lr, ip, #17
-    itt     ne
-    strbne  r2, [r0]
-    m_ret   inst=popne
-    itt     cs
-    strhcs  r2, [r0]
-    m_ret   inst=popcs
-    lsls    ip, ip, #1
-    itt     eq
-    streq   r2, [r0]
-    m_ret   inst=popeq
-    strh    r2, [r0], #2
-    lsr     r3, r2, #16
-    strb    r3, [r0]
-    m_ret   inst=pop
-
-strcpy_zero_in_second_register:
-    lsls    lr, ip, #17
-    ittt    ne
-    stmiane r0!, {r2}
-    strbne  r3, [r0]
-    m_ret   inst=popne
-    ittt    cs
-    strcs   r2, [r0], #4
-    strhcs  r3, [r0]
-    m_ret   inst=popcs
-    lsls    ip, ip, #1
-    itt     eq
-    stmiaeq r0, {r2, r3}
-    m_ret   inst=popeq
-    stmia   r0!, {r2}
-    strh    r3, [r0], #2
-    lsr     r4, r3, #16
-    strb    r4, [r0]
-    m_ret   inst=pop
-
-strcpy_align_dst:
-    // Align to a double word (64 bits).
-    rsb     r3, r3, #8
-    lsls    ip, r3, #31
-    beq     strcpy_align_to_32
-
-    ldrb    r2, [r1], #1
-    strb    r2, [r0], #1
-    cbz     r2, strcpy_complete
-
-strcpy_align_to_32:
-    bcc     strcpy_align_to_64
-
-    ldrb    r4, [r1], #1
-    strb    r4, [r0], #1
-    cmp     r4, #0
-    it      eq
-    m_ret   inst=popeq
-    ldrb    r5, [r1], #1
-    strb    r5, [r0], #1
-    cmp     r5, #0
-    it      eq
-    m_ret   inst=popeq
-
-strcpy_align_to_64:
-    tst     r3, #4
-    beq     strcpy_check_src_align
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-    stmia   r0!, {r2}
-    b       strcpy_check_src_align
-
-strcpy_complete:
-    m_ret   inst=pop
-
-strcpy_unaligned_copy:
-    // Dst is aligned to a double word, while src is at an unknown alignment.
-    // There are 7 different versions of the unaligned copy code
-    // to prevent overreading the src. The mainloop of every single version
-    // will store 64 bits per loop. The difference is how much of src can
-    // be read without potentially crossing a page boundary.
-    tbb     [pc, r3]
-strcpy_unaligned_branchtable:
-    .byte 0
-    .byte ((strcpy_unalign7 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign6 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign5 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign4 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign3 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign2 - strcpy_unaligned_branchtable)/2)
-    .byte ((strcpy_unalign1 - strcpy_unaligned_branchtable)/2)
-
-    .p2align 2
-    // Can read 7 bytes before possibly crossing a page.
-strcpy_unalign7:
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    ldrb    r3, [r1]
-    cbz     r3, strcpy_unalign7_copy5bytes
-    ldrb    r4, [r1, #1]
-    cbz     r4, strcpy_unalign7_copy6bytes
-    ldrb    r5, [r1, #2]
-    cbz     r5, strcpy_unalign7_copy7bytes
-
-    ldr     r3, [r1], #4
-    pld     [r1, #64]
-
-    lsrs    ip, r3, #24
-    stmia   r0!, {r2, r3}
-    beq     strcpy_unalign_return
-    b       strcpy_unalign7
-
-strcpy_unalign7_copy5bytes:
-    stmia   r0!, {r2}
-    strb    r3, [r0]
-strcpy_unalign_return:
-    m_ret   inst=pop
-
-strcpy_unalign7_copy6bytes:
-    stmia   r0!, {r2}
-    strb    r3, [r0], #1
-    strb    r4, [r0], #1
-    m_ret   inst=pop
-
-strcpy_unalign7_copy7bytes:
-    stmia   r0!, {r2}
-    strb    r3, [r0], #1
-    strb    r4, [r0], #1
-    strb    r5, [r0], #1
-    m_ret   inst=pop
-
-    .p2align 2
-    // Can read 6 bytes before possibly crossing a page.
-strcpy_unalign6:
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    ldrb    r4, [r1]
-    cbz     r4, strcpy_unalign_copy5bytes
-    ldrb    r5, [r1, #1]
-    cbz     r5, strcpy_unalign_copy6bytes
-
-    ldr     r3, [r1], #4
-    pld     [r1, #64]
-
-    tst     r3, #0xff0000
-    beq     strcpy_unalign6_copy7bytes
-    lsrs    ip, r3, #24
-    stmia   r0!, {r2, r3}
-    beq     strcpy_unalign_return
-    b       strcpy_unalign6
-
-strcpy_unalign6_copy7bytes:
-    stmia   r0!, {r2}
-    strh    r3, [r0], #2
-    lsr     r3, #16
-    strb    r3, [r0]
-    m_ret   inst=pop
-
-    .p2align 2
-    // Can read 5 bytes before possibly crossing a page.
-strcpy_unalign5:
-    ldr     r2, [r1], #4
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    ldrb    r4, [r1]
-    cbz     r4, strcpy_unalign_copy5bytes
-
-    ldr     r3, [r1], #4
-
-    pld     [r1, #64]
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    stmia   r0!, {r2, r3}
-    b       strcpy_unalign5
-
-strcpy_unalign_copy5bytes:
-    stmia   r0!, {r2}
-    strb    r4, [r0]
-    m_ret   inst=pop
-
-strcpy_unalign_copy6bytes:
-    stmia   r0!, {r2}
-    strb    r4, [r0], #1
-    strb    r5, [r0]
-    m_ret   inst=pop
-
-    .p2align 2
-    // Can read 4 bytes before possibly crossing a page.
-strcpy_unalign4:
-    ldmia   r1!, {r2}
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    ldmia   r1!, {r3}
-    pld     [r1, #64]
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    stmia   r0!, {r2, r3}
-    b       strcpy_unalign4
-
-    .p2align 2
-    // Can read 3 bytes before possibly crossing a page.
-strcpy_unalign3:
-    ldrb    r2, [r1]
-    cbz     r2, strcpy_unalign3_copy1byte
-    ldrb    r3, [r1, #1]
-    cbz     r3, strcpy_unalign3_copy2bytes
-    ldrb    r4, [r1, #2]
-    cbz     r4, strcpy_unalign3_copy3bytes
-
-    ldr     r2, [r1], #4
-    ldr     r3, [r1], #4
-
-    pld     [r1, #64]
-
-    lsrs    lr, r2, #24
-    beq     strcpy_unalign_copy4bytes
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    stmia   r0!, {r2, r3}
-    b       strcpy_unalign3
-
-strcpy_unalign3_copy1byte:
-    strb    r2, [r0]
-    m_ret   inst=pop
-
-strcpy_unalign3_copy2bytes:
-    strb    r2, [r0], #1
-    strb    r3, [r0]
-    m_ret   inst=pop
-
-strcpy_unalign3_copy3bytes:
-    strb    r2, [r0], #1
-    strb    r3, [r0], #1
-    strb    r4, [r0]
-    m_ret   inst=pop
-
-    .p2align 2
-    // Can read 2 bytes before possibly crossing a page.
-strcpy_unalign2:
-    ldrb    r2, [r1]
-    cbz     r2, strcpy_unalign_copy1byte
-    ldrb    r3, [r1, #1]
-    cbz     r3, strcpy_unalign_copy2bytes
-
-    ldr     r2, [r1], #4
-    ldr     r3, [r1], #4
-    pld     [r1, #64]
-
-    tst     r2, #0xff0000
-    beq     strcpy_unalign_copy3bytes
-    lsrs    ip, r2, #24
-    beq     strcpy_unalign_copy4bytes
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    stmia   r0!, {r2, r3}
-    b       strcpy_unalign2
-
-    .p2align 2
-    // Can read 1 byte before possibly crossing a page.
-strcpy_unalign1:
-    ldrb    r2, [r1]
-    cbz     r2, strcpy_unalign_copy1byte
-
-    ldr     r2, [r1], #4
-    ldr     r3, [r1], #4
-
-    pld     [r1, #64]
-
-    sub     ip, r2, #0x01010101
-    bic     ip, ip, r2
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_first_register
-
-    sub     ip, r3, #0x01010101
-    bic     ip, ip, r3
-    ands    ip, ip, #0x80808080
-    bne     strcpy_zero_in_second_register
-
-    stmia   r0!, {r2, r3}
-    b       strcpy_unalign1
-
-strcpy_unalign_copy1byte:
-    strb    r2, [r0]
-    m_ret   inst=pop
-
-strcpy_unalign_copy2bytes:
-    strb    r2, [r0], #1
-    strb    r3, [r0]
-    m_ret   inst=pop
-
-strcpy_unalign_copy3bytes:
-    strh    r2, [r0], #2
-    lsr     r2, #16
-    strb    r2, [r0]
-    m_ret   inst=pop
-
-strcpy_unalign_copy4bytes:
-    stmia   r0, {r2}
-    m_ret   inst=pop
-END(strcpy)
+#define STRCPY
+#include "string_copy.S"

libc/arch-arm/cortex-a9/bionic/string_copy.S

@@ -0,0 +1,535 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/*
+ * Copyright (c) 2013 ARM Ltd
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the company may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if !defined(STPCPY) && !defined(STRCPY)
+#error "Either STPCPY or STRCPY must be defined."
+#endif
+
+#include <private/bionic_asm.h>
+
+    .syntax unified
+
+    .thumb
+    .thumb_func
+
+#if defined(STPCPY)
+    .macro m_push
+    push    {r4, r5, lr}
+    .cfi_def_cfa_offset 12
+    .cfi_rel_offset r4, 0
+    .cfi_rel_offset r5, 4
+    .cfi_rel_offset lr, 8
+    .endm // m_push
+#else
+    .macro m_push
+    push    {r0, r4, r5, lr}
+    .cfi_def_cfa_offset 16
+    .cfi_rel_offset r0, 0
+    .cfi_rel_offset r4, 4
+    .cfi_rel_offset r5, 8
+    .cfi_rel_offset lr, 12
+    .endm // m_push
+#endif
+
+#if defined(STPCPY)
+    .macro m_ret inst
+    \inst   {r4, r5, pc}
+    .endm // m_ret
+#else
+    .macro m_ret inst
+    \inst   {r0, r4, r5, pc}
+    .endm // m_ret
+#endif
+
+    .macro m_copy_byte reg, cmd, label
+    ldrb    \reg, [r1], #1
+    strb    \reg, [r0], #1
+    \cmd    \reg, \label
+    .endm // m_copy_byte
+
+#if defined(STPCPY)
+ENTRY(stpcpy)
+#else
+ENTRY(strcpy)
+#endif
+    // Unroll the first 8 bytes that will be copied.
+    m_push
+    m_copy_byte reg=r2, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r3, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r4, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r5, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r2, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r3, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r4, cmd=cbz, label=.Lstringcopy_finish
+    m_copy_byte reg=r5, cmd=cbnz, label=.Lstringcopy_continue
+
+.Lstringcopy_finish:
+#if defined(STPCPY)
+    sub     r0, r0, #1
+#endif
+    m_ret   inst=pop
+
+.Lstringcopy_continue:
+    pld     [r1, #0]
+    ands    r3, r0, #7
+    bne     .Lstringcopy_align_dst
+
+.Lstringcopy_check_src_align:
+    // At this point dst is aligned to a double word, check if src
+    // is also aligned to a double word.
+    ands    r3, r1, #7
+    bne     .Lstringcopy_unaligned_copy
+
+    .p2align 2
+.Lstringcopy_mainloop:
+    ldmia   r1!, {r2, r3}
+
+    pld     [r1, #64]
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    stmia   r0!, {r2, r3}
+    b       .Lstringcopy_mainloop
+
+.Lstringcopy_zero_in_first_register:
+    lsls    lr, ip, #17
+    itt     ne
+    strbne  r2, [r0]
+    m_ret   inst=popne
+    itt     cs
+#if defined(STPCPY)
+    strhcs  r2, [r0], #1
+#else
+    strhcs  r2, [r0]
+#endif
+    m_ret   inst=popcs
+    lsls    ip, ip, #1
+    itt     eq
+#if defined(STPCPY)
+    streq   r2, [r0], #3
+#else
+    streq   r2, [r0]
+#endif
+    m_ret   inst=popeq
+    strh    r2, [r0], #2
+    lsr     r3, r2, #16
+    strb    r3, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_zero_in_second_register:
+    lsls    lr, ip, #17
+    ittt    ne
+    stmiane r0!, {r2}
+    strbne  r3, [r0]
+    m_ret   inst=popne
+    ittt    cs
+    strcs   r2, [r0], #4
+#if defined(STPCPY)
+    strhcs  r3, [r0], #1
+#else
+    strhcs  r3, [r0]
+#endif
+    m_ret   inst=popcs
+    lsls    ip, ip, #1
+#if defined(STPCPY)
+    ittt    eq
+#else
+    itt     eq
+#endif
+    stmiaeq r0, {r2, r3}
+#if defined(STPCPY)
+    addeq   r0, r0, #7
+#endif
+    m_ret   inst=popeq
+    stmia   r0!, {r2}
+    strh    r3, [r0], #2
+    lsr     r4, r3, #16
+    strb    r4, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_align_dst:
+    // Align to a double word (64 bits).
+    rsb     r3, r3, #8
+    lsls    ip, r3, #31
+    beq     .Lstringcopy_align_to_32
+
+    ldrb    r2, [r1], #1
+    strb    r2, [r0], #1
+    cbz     r2, .Lstringcopy_complete
+
+.Lstringcopy_align_to_32:
+    bcc     .Lstringcopy_align_to_64
+
+    ldrb    r4, [r1], #1
+    strb    r4, [r0], #1
+    cmp     r4, #0
+#if defined(STPCPY)
+    itt     eq
+    subeq   r0, r0, #1
+#else
+    it      eq
+#endif
+    m_ret   inst=popeq
+    ldrb    r5, [r1], #1
+    strb    r5, [r0], #1
+    cmp     r5, #0
+#if defined(STPCPY)
+    itt     eq
+    subeq   r0, r0, #1
+#else
+    it      eq
+#endif
+    m_ret   inst=popeq
+
+.Lstringcopy_align_to_64:
+    tst     r3, #4
+    beq     .Lstringcopy_check_src_align
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+    stmia   r0!, {r2}
+    b       .Lstringcopy_check_src_align
+
+.Lstringcopy_complete:
+#if defined(STPCPY)
+    sub     r0, r0, #1
+#endif
+    m_ret   inst=pop
+
+.Lstringcopy_unaligned_copy:
+    // Dst is aligned to a double word, while src is at an unknown alignment.
+    // There are 7 different versions of the unaligned copy code
+    // to prevent overreading the src. The mainloop of every single version
+    // will store 64 bits per loop. The difference is how much of src can
+    // be read without potentially crossing a page boundary.
+    tbb     [pc, r3]
+.Lstringcopy_unaligned_branchtable:
+    .byte 0
+    .byte ((.Lstringcopy_unalign7 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign6 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign5 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign4 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign3 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign2 - .Lstringcopy_unaligned_branchtable)/2)
+    .byte ((.Lstringcopy_unalign1 - .Lstringcopy_unaligned_branchtable)/2)
+
+    .p2align 2
+    // Can read 7 bytes before possibly crossing a page.
+.Lstringcopy_unalign7:
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    ldrb    r3, [r1]
+    cbz     r3, .Lstringcopy_unalign7_copy5bytes
+    ldrb    r4, [r1, #1]
+    cbz     r4, .Lstringcopy_unalign7_copy6bytes
+    ldrb    r5, [r1, #2]
+    cbz     r5, .Lstringcopy_unalign7_copy7bytes
+
+    ldr     r3, [r1], #4
+    pld     [r1, #64]
+
+    lsrs    ip, r3, #24
+    stmia   r0!, {r2, r3}
+#if defined(STPCPY)
+    beq     .Lstringcopy_finish
+#else
+    beq     .Lstringcopy_unalign_return
+#endif
+    b       .Lstringcopy_unalign7
+
+.Lstringcopy_unalign7_copy5bytes:
+    stmia   r0!, {r2}
+    strb    r3, [r0]
+.Lstringcopy_unalign_return:
+    m_ret   inst=pop
+
+.Lstringcopy_unalign7_copy6bytes:
+    stmia   r0!, {r2}
+    strb    r3, [r0], #1
+    strb    r4, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_unalign7_copy7bytes:
+    stmia   r0!, {r2}
+    strb    r3, [r0], #1
+    strb    r4, [r0], #1
+    strb    r5, [r0]
+    m_ret   inst=pop
+
+    .p2align 2
+    // Can read 6 bytes before possibly crossing a page.
+.Lstringcopy_unalign6:
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    ldrb    r4, [r1]
+    cbz     r4, .Lstringcopy_unalign_copy5bytes
+    ldrb    r5, [r1, #1]
+    cbz     r5, .Lstringcopy_unalign_copy6bytes
+
+    ldr     r3, [r1], #4
+    pld     [r1, #64]
+
+    tst     r3, #0xff0000
+    beq     .Lstringcopy_unalign6_copy7bytes
+    lsrs    ip, r3, #24
+    stmia   r0!, {r2, r3}
+#if defined(STPCPY)
+    beq     .Lstringcopy_finish
+#else
+    beq     .Lstringcopy_unalign_return
+#endif
+    b       .Lstringcopy_unalign6
+
+.Lstringcopy_unalign6_copy7bytes:
+    stmia   r0!, {r2}
+    strh    r3, [r0], #2
+    lsr     r3, #16
+    strb    r3, [r0]
+    m_ret   inst=pop
+
+    .p2align 2
+    // Can read 5 bytes before possibly crossing a page.
+.Lstringcopy_unalign5:
+    ldr     r2, [r1], #4
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    ldrb    r4, [r1]
+    cbz     r4, .Lstringcopy_unalign_copy5bytes
+
+    ldr     r3, [r1], #4
+
+    pld     [r1, #64]
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    stmia   r0!, {r2, r3}
+    b       .Lstringcopy_unalign5
+
+.Lstringcopy_unalign_copy5bytes:
+    stmia   r0!, {r2}
+    strb    r4, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_unalign_copy6bytes:
+    stmia   r0!, {r2}
+    strb    r4, [r0], #1
+    strb    r5, [r0]
+    m_ret   inst=pop
+
+    .p2align 2
+    // Can read 4 bytes before possibly crossing a page.
+.Lstringcopy_unalign4:
+    ldmia   r1!, {r2}
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    ldmia   r1!, {r3}
+    pld     [r1, #64]
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    stmia   r0!, {r2, r3}
+    b       .Lstringcopy_unalign4
+
+    .p2align 2
+    // Can read 3 bytes before possibly crossing a page.
+.Lstringcopy_unalign3:
+    ldrb    r2, [r1]
+    cbz     r2, .Lstringcopy_unalign3_copy1byte
+    ldrb    r3, [r1, #1]
+    cbz     r3, .Lstringcopy_unalign3_copy2bytes
+    ldrb    r4, [r1, #2]
+    cbz     r4, .Lstringcopy_unalign3_copy3bytes
+
+    ldr     r2, [r1], #4
+    ldr     r3, [r1], #4
+
+    pld     [r1, #64]
+
+    lsrs    lr, r2, #24
+    beq     .Lstringcopy_unalign_copy4bytes
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    stmia   r0!, {r2, r3}
+    b       .Lstringcopy_unalign3
+
+.Lstringcopy_unalign3_copy1byte:
+    strb    r2, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_unalign3_copy2bytes:
+    strb    r2, [r0], #1
+    strb    r3, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_unalign3_copy3bytes:
+    strb    r2, [r0], #1
+    strb    r3, [r0], #1
+    strb    r4, [r0]
+    m_ret   inst=pop
+
+    .p2align 2
+    // Can read 2 bytes before possibly crossing a page.
+.Lstringcopy_unalign2:
+    ldrb    r2, [r1]
+    cbz     r2, .Lstringcopy_unalign_copy1byte
+    ldrb    r3, [r1, #1]
+    cbz     r3, .Lstringcopy_unalign_copy2bytes
+
+    ldr     r2, [r1], #4
+    ldr     r3, [r1], #4
+    pld     [r1, #64]
+
+    tst     r2, #0xff0000
+    beq     .Lstringcopy_unalign_copy3bytes
+    lsrs    ip, r2, #24
+    beq     .Lstringcopy_unalign_copy4bytes
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    stmia   r0!, {r2, r3}
+    b       .Lstringcopy_unalign2
+
+    .p2align 2
+    // Can read 1 byte before possibly crossing a page.
+.Lstringcopy_unalign1:
+    ldrb    r2, [r1]
+    cbz     r2, .Lstringcopy_unalign_copy1byte
+
+    ldr     r2, [r1], #4
+    ldr     r3, [r1], #4
+
+    pld     [r1, #64]
+
+    sub     ip, r2, #0x01010101
+    bic     ip, ip, r2
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_first_register
+
+    sub     ip, r3, #0x01010101
+    bic     ip, ip, r3
+    ands    ip, ip, #0x80808080
+    bne     .Lstringcopy_zero_in_second_register
+
+    stmia   r0!, {r2, r3}
+    b       .Lstringcopy_unalign1
+
+.Lstringcopy_unalign_copy1byte:
+    strb    r2, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_unalign_copy2bytes:
+    strb    r2, [r0], #1
+    strb    r3, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_unalign_copy3bytes:
+    strh    r2, [r0], #2
+    lsr     r2, #16
+    strb    r2, [r0]
+    m_ret   inst=pop
+
+.Lstringcopy_unalign_copy4bytes:
+    stmia   r0, {r2}
+#if defined(STPCPY)
+    add     r0, r0, #3
+#endif
+    m_ret   inst=pop
+#if defined(STPCPY)
+END(stpcpy)
+#else
+END(strcpy)
+#endif

libc/arch-arm/cortex-a9/cortex-a9.mk

@@ -1,9 +1,11 @@
 libc_bionic_src_files_arm += \
     arch-arm/cortex-a9/bionic/memcpy.S \
     arch-arm/cortex-a9/bionic/memset.S \
+    arch-arm/cortex-a9/bionic/stpcpy.S \
     arch-arm/cortex-a9/bionic/strcat.S \
+    arch-arm/cortex-a9/bionic/__strcat_chk.S \
     arch-arm/cortex-a9/bionic/strcmp.S \
     arch-arm/cortex-a9/bionic/strcpy.S \
-    arch-arm/cortex-a9/bionic/strlen.S \
-    arch-arm/cortex-a9/bionic/__strcat_chk.S \
     arch-arm/cortex-a9/bionic/__strcpy_chk.S \
+    arch-arm/cortex-a9/bionic/strlen.S \
+    bionic/memmove.c \

libc/arch-arm/denver/bionic/__strcat_chk.S

@@ -40,12 +40,10 @@
 ENTRY(__strcat_chk)
     pld     [r0, #0]
     push    {r0, lr}
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4
     push    {r4, r5}
-    .save   {r4, r5}
     .cfi_adjust_cfa_offset 8
     .cfi_rel_offset r4, 0
     .cfi_rel_offset r5, 4
@@ -195,9 +193,6 @@ END(__strcat_chk)
 #include "memcpy_base.S"
 
 ENTRY_PRIVATE(__strcat_chk_failed)
-    .save   {r0, lr}
-    .save   {r4, r5}
-
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4

libc/arch-arm/denver/bionic/__strcpy_chk.S

@@ -39,7 +39,6 @@
 ENTRY(__strcpy_chk)
     pld     [r0, #0]
     push    {r0, lr}
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4
@@ -161,7 +160,6 @@ END(__strcpy_chk)
 #include "memcpy_base.S"
 
 ENTRY_PRIVATE(__strcpy_chk_failed)
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4

libc/arch-arm/denver/bionic/memcpy.S

@@ -72,7 +72,6 @@ END(__memcpy_chk)
 ENTRY(memcpy)
         pld     [r1, #64]
         push    {r0, lr}
-        .save   {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4
@@ -85,7 +84,6 @@ END(memcpy)
 ENTRY_PRIVATE(__memcpy_chk_fail)
         // Preserve lr for backtrace.
         push    {lr}
-        .save   {lr}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset lr, 0
 

libc/arch-arm/denver/bionic/memmove.S

@@ -0,0 +1,281 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ * All rights reserved.
+ * Copyright (c) 2013-2014 NVIDIA Corporation.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <private/bionic_asm.h>
+#include <private/libc_events.h>
+
+        .text
+        .syntax unified
+        .fpu    neon
+
+#define CACHE_LINE_SIZE         (64)
+#define MEMCPY_BLOCK_SIZE_SMALL (32768)
+#define MEMCPY_BLOCK_SIZE_MID   (1048576)
+#define PREFETCH_DISTANCE_NEAR  (CACHE_LINE_SIZE*4)
+#define PREFETCH_DISTANCE_MID   (CACHE_LINE_SIZE*4)
+#define PREFETCH_DISTANCE_FAR   (CACHE_LINE_SIZE*16)
+
+ENTRY(memmove)
+        cmp         r2, #0
+        cmpne       r0, r1
+        bxeq        lr
+        subs        r3, r0, r1
+        bls         .L_jump_to_memcpy
+        cmp         r2, r3
+        bhi         .L_reversed_memcpy
+
+.L_jump_to_memcpy:
+        b           memcpy
+
+.L_reversed_memcpy:
+        push        {r0, lr}
+        .cfi_def_cfa_offset 8
+        .cfi_rel_offset r0, 0
+        .cfi_rel_offset lr, 4
+
+        add         r0, r0, r2
+        add         r1, r1, r2
+
+        /* preload next cache line */
+        pld         [r1, #-CACHE_LINE_SIZE]
+        pld         [r1, #-CACHE_LINE_SIZE*2]
+
+.L_reversed_memcpy_align_dest:
+        /* Deal with very small blocks (< 32bytes) asap */
+        cmp         r2, #32
+        blo         .L_reversed_memcpy_lt_32bytes
+        /* no need to align if len < 128 bytes */
+        cmp         r2, #128
+        blo         .L_reversed_memcpy_lt_128bytes
+        /* align destination to 64 bytes (1 cache line) */
+        ands        r3, r0, #0x3f
+        beq         .L_reversed_memcpy_dispatch
+        sub         r2, r2, r3
+0:      /* copy 1 byte */
+        movs        ip, r3, lsl #31
+        ldrbmi      ip, [r1, #-1]!
+        strbmi      ip, [r0, #-1]!
+1:      /* copy 2 bytes */
+        ldrbcs      ip, [r1, #-1]!
+        strbcs      ip, [r0, #-1]!
+        ldrbcs      ip, [r1, #-1]!
+        strbcs      ip, [r0, #-1]!
+2:      /* copy 4 bytes */
+        movs        ip, r3, lsl #29
+        bpl         3f
+        sub         r1, r1, #4
+        sub         r0, r0, #4
+        vld4.8      {d0[0], d1[0], d2[0], d3[0]}, [r1]
+        vst4.8      {d0[0], d1[0], d2[0], d3[0]}, [r0, :32]
+3:      /* copy 8 bytes */
+        bcc         4f
+        sub         r1, r1, #8
+        sub         r0, r0, #8
+        vld1.8      {d0}, [r1]
+        vst1.8      {d0}, [r0, :64]
+4:      /* copy 16 bytes */
+        movs        ip, r3, lsl #27
+        bpl         5f
+        sub         r1, r1, #16
+        sub         r0, r0, #16
+        vld1.8      {q0}, [r1]
+        vst1.8      {q0}, [r0, :128]
+5:      /* copy 32 bytes */
+        bcc         .L_reversed_memcpy_dispatch
+        sub         r1, r1, #32
+        sub         r0, r0, #32
+        vld1.8      {q0, q1}, [r1]
+        vst1.8      {q0, q1}, [r0, :256]
+
+.L_reversed_memcpy_dispatch:
+        /* preload more cache lines */
+        pld         [r1, #-CACHE_LINE_SIZE*3]
+        pld         [r1, #-CACHE_LINE_SIZE*4]
+
+        cmp         r2, #MEMCPY_BLOCK_SIZE_SMALL
+        blo         .L_reversed_memcpy_neon_pld_near
+        cmp         r2, #MEMCPY_BLOCK_SIZE_MID
+        blo         .L_reversed_memcpy_neon_pld_mid
+        b           .L_reversed_memcpy_neon_pld_far
+
+.L_reversed_memcpy_neon_pld_near:
+        /* less than 128 bytes? */
+        subs        r2, r2, #128
+        blo         1f
+        sub         r1, r1, #32
+        sub         r0, r0, #32
+        mov         r3, #-32
+        .align      4
+0:
+        /* copy 128 bytes in each loop */
+        subs        r2, r2, #128
+
+        /* preload to cache */
+        pld         [r1, #-(PREFETCH_DISTANCE_NEAR+CACHE_LINE_SIZE*2)+32]
+        /* copy a cache line */
+        vld1.8      {q0, q1}, [r1], r3
+        vst1.8      {q0, q1}, [r0, :256], r3
+        vld1.8      {q0, q1}, [r1], r3
+        vst1.8      {q0, q1}, [r0, :256], r3
+
+        /* preload to cache */
+        pld         [r1, #-(PREFETCH_DISTANCE_NEAR+CACHE_LINE_SIZE*2)+32]
+        /* copy a cache line */
+        vld1.8      {q0, q1}, [r1], r3
+        vst1.8      {q0, q1}, [r0, :256], r3
+        vld1.8      {q0, q1}, [r1], r3
+        vst1.8      {q0, q1}, [r0, :256], r3
+
+        bhs         0b
+        add         r1, r1, #32
+        add         r0, r0, #32
+1:
+        adds        r2, r2, #128
+        bne         .L_reversed_memcpy_lt_128bytes
+        pop         {r0, pc}
+
+.L_reversed_memcpy_neon_pld_mid:
+        subs        r2, r2, #128
+        sub         r1, r1, #32
+        sub         r0, r0, #32
+        mov         r3, #-32
+        .align      4
+0:
+        /* copy 128 bytes in each loop */
+        subs        r2, r2, #128
+
+        /* preload to cache */
+        pld         [r1, #-(PREFETCH_DISTANCE_MID+CACHE_LINE_SIZE)+32]
+        /* copy a cache line */
+        vld1.8      {q0, q1}, [r1], r3
+        vst1.8      {q0, q1}, [r0, :256], r3
+        vld1.8      {q0, q1}, [r1], r3
+        vst1.8      {q0, q1}, [r0, :256], r3
+
+        /* preload to cache */
+        pld         [r1, #-(PREFETCH_DISTANCE_MID+CACHE_LINE_SIZE)+32]
+        /* copy a cache line */
+        vld1.8      {q0, q1}, [r1], r3
+        vst1.8      {q0, q1}, [r0, :256], r3
+        vld1.8      {q0, q1}, [r1], r3
+        vst1.8      {q0, q1}, [r0, :256], r3
+
+        bhs         0b
+        add         r1, r1, #32
+        add         r0, r0, #32
+1:
+        adds        r2, r2, #128
+        bne         .L_reversed_memcpy_lt_128bytes
+        pop         {r0, pc}
+
+.L_reversed_memcpy_neon_pld_far:
+        sub         r2, r2, #128
+        sub         r0, r0, #128
+        sub         r1, r1, #128
+        .align      4
+0:
+        /* copy 128 bytes in each loop */
+        subs        r2, r2, #128
+
+        /* preload to cache */
+        pld         [r1, #-(PREFETCH_DISTANCE_FAR+CACHE_LINE_SIZE*2)+128]
+        pld         [r1, #-(PREFETCH_DISTANCE_FAR+CACHE_LINE_SIZE)+128]
+        /* read */
+        vld1.8      {q0, q1}, [r1]!
+        vld1.8      {q2, q3}, [r1]!
+        vld1.8      {q8, q9}, [r1]!
+        vld1.8      {q10, q11}, [r1]!
+        /* write */
+        vst1.8      {q0, q1}, [r0, :256]!
+        vst1.8      {q2, q3}, [r0, :256]!
+        vst1.8      {q8, q9}, [r0, :256]!
+        vst1.8      {q10, q11}, [r0, :256]!
+
+        sub         r0, r0, #256
+        sub         r1, r1, #256
+        bhs         0b
+        add         r0, r0, #128
+        add         r1, r1, #128
+1:
+        adds        r2, r2, #128
+        bne         .L_reversed_memcpy_lt_128bytes
+        pop         {r0, pc}
+
+.L_reversed_memcpy_lt_128bytes:
+6:      /* copy 64 bytes */
+        movs        ip, r2, lsl #26
+        bcc         5f
+        sub         r1, r1, #32
+        sub         r0, r0, #32
+        vld1.8      {q0, q1}, [r1]
+        vst1.8      {q0, q1}, [r0]
+        sub         r1, r1, #32
+        sub         r0, r0, #32
+        vld1.8      {q0, q1}, [r1]
+        vst1.8      {q0, q1}, [r0]
+5:      /* copy 32 bytes */
+        bpl         4f
+        sub         r1, r1, #32
+        sub         r0, r0, #32
+        vld1.8      {q0, q1}, [r1]
+        vst1.8      {q0, q1}, [r0]
+.L_reversed_memcpy_lt_32bytes:
+4:      /* copy 16 bytes */
+        movs        ip, r2, lsl #28
+        bcc         3f
+        sub         r1, r1, #16
+        sub         r0, r0, #16
+        vld1.8      {q0}, [r1]
+        vst1.8      {q0}, [r0]
+3:      /* copy 8 bytes */
+        bpl         2f
+        sub         r1, r1, #8
+        sub         r0, r0, #8
+        vld1.8      {d0}, [r1]
+        vst1.8      {d0}, [r0]
+2:      /* copy 4 bytes */
+        ands        ip, r2, #0x4
+        beq         1f
+        sub         r1, r1, #4
+        sub         r0, r0, #4
+        vld4.8      {d0[0], d1[0], d2[0], d3[0]}, [r1]
+        vst4.8      {d0[0], d1[0], d2[0], d3[0]}, [r0]
+1:      /* copy 2 bytes */
+        movs        ip, r2, lsl #31
+        ldrbcs      ip, [r1, #-1]!
+        strbcs      ip, [r0, #-1]!
+        ldrbcs      ip, [r1, #-1]!
+        strbcs      ip, [r0, #-1]!
+0:      /* copy 1 byte */
+        ldrbmi      ip, [r1, #-1]!
+        strbmi      ip, [r0, #-1]!
+
+        pop         {r0, pc}
+
+END(memmove)

libc/arch-arm/denver/denver.mk

@@ -1,12 +1,14 @@
 libc_bionic_src_files_arm += \
     arch-arm/denver/bionic/memcpy.S \
+    arch-arm/denver/bionic/memmove.S \
     arch-arm/denver/bionic/memset.S \
     arch-arm/denver/bionic/__strcat_chk.S \
-    arch-arm/denver/bionic/__strcpy_chk.S
+    arch-arm/denver/bionic/__strcpy_chk.S \
 
 # Use cortex-a15 versions of strcat/strcpy/strlen.
 libc_bionic_src_files_arm += \
+    arch-arm/cortex-a15/bionic/stpcpy.S \
     arch-arm/cortex-a15/bionic/strcat.S \
+    arch-arm/cortex-a15/bionic/strcmp.S \
     arch-arm/cortex-a15/bionic/strcpy.S \
     arch-arm/cortex-a15/bionic/strlen.S \
-    arch-arm/cortex-a15/bionic/strcmp.S

libc/arch-arm/generic/generic.mk

@@ -4,6 +4,8 @@ libc_bionic_src_files_arm += \
     arch-arm/generic/bionic/strcmp.S \
     arch-arm/generic/bionic/strcpy.S \
     arch-arm/generic/bionic/strlen.c \
+    bionic/memmove.c \
     bionic/__strcat_chk.cpp \
     bionic/__strcpy_chk.cpp \
+    upstream-openbsd/lib/libc/string/stpcpy.c \
     upstream-openbsd/lib/libc/string/strcat.c \

libc/arch-arm/include/machine/asm.h

@@ -38,9 +38,7 @@
 #ifndef _ARM32_ASM_H_
 #define _ARM32_ASM_H_
 
-#ifndef _ALIGN_TEXT
-# define _ALIGN_TEXT .align 0
-#endif
+#define __bionic_asm_align 0
 
 #undef __bionic_asm_custom_entry
 #undef __bionic_asm_custom_end
@@ -50,10 +48,4 @@
 #undef __bionic_asm_function_type
 #define __bionic_asm_function_type #function
 
-#if defined(__ELF__) && defined(PIC)
-#define PIC_SYM(x,y) x ## ( ## y ## )
-#else
-#define PIC_SYM(x,y) x
-#endif
-
 #endif /* !_ARM_ASM_H_ */

libc/arch-arm/krait/bionic/__strcat_chk.S

@@ -40,12 +40,10 @@
 ENTRY(__strcat_chk)
     pld     [r0, #0]
     push    {r0, lr}
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4
     push    {r4, r5}
-    .save   {r4, r5}
     .cfi_adjust_cfa_offset 8
     .cfi_rel_offset r4, 0
     .cfi_rel_offset r5, 4
@@ -194,8 +192,6 @@ END(__strcat_chk)
 #include "memcpy_base.S"
 
 ENTRY_PRIVATE(__strcat_chk_failed)
-    .save   {r0, lr}
-    .save   {r4, r5}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4

libc/arch-arm/krait/bionic/__strcpy_chk.S

@@ -39,7 +39,6 @@
 ENTRY(__strcpy_chk)
     pld     [r0, #0]
     push    {r0, lr}
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4
@@ -161,7 +160,6 @@ END(__strcpy_chk)
 #include "memcpy_base.S"
 
 ENTRY_PRIVATE(__strcpy_chk_failed)
-    .save   {r0, lr}
     .cfi_def_cfa_offset 8
     .cfi_rel_offset r0, 0
     .cfi_rel_offset lr, 4

libc/arch-arm/krait/bionic/memcpy.S

@@ -53,7 +53,6 @@ END(__memcpy_chk)
 ENTRY(memcpy)
         pld     [r1, #64]
         stmfd   sp!, {r0, lr}
-        .save   {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4
@@ -66,7 +65,6 @@ END(memcpy)
 ENTRY_PRIVATE(__memcpy_chk_fail)
         // Preserve lr for backtrace.
         push    {lr}
-        .save   {lr}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset lr, 0
 

libc/arch-arm/krait/bionic/memcpy_base.S

@@ -36,7 +36,6 @@
 // Assumes neon instructions and a cache line size of 32 bytes.
 
 ENTRY_PRIVATE(MEMCPY_BASE)
-        .save {r0, lr}
         .cfi_def_cfa_offset 8
         .cfi_rel_offset r0, 0
         .cfi_rel_offset lr, 4

libc/arch-arm/krait/bionic/memset.S

@@ -43,7 +43,6 @@ ENTRY(__memset_chk)
         bls         .L_done
 
         // Preserve lr for backtrace.
-        .save       {lr}
         push        {lr}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset lr, 0
@@ -69,7 +68,6 @@ END(bzero)
 
 /* memset() returns its first argument.  */
 ENTRY(memset)
-        .save       {r0}
         stmfd       sp!, {r0}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset r0, 0

libc/arch-arm/krait/bionic/strcmp.S

@@ -168,7 +168,6 @@ ENTRY(strcmp)
         bne     .L_do_align
 
         /* Fast path.  */
-        .save   {r4-r7}
         init
 
 .L_doubleword_aligned:

libc/arch-arm/krait/krait.mk

@@ -5,8 +5,10 @@ libc_bionic_src_files_arm += \
     arch-arm/krait/bionic/__strcat_chk.S \
     arch-arm/krait/bionic/__strcpy_chk.S \
 
-# Use cortex-a15 versions of strcat/strcpy/strlen.
+# Use cortex-a15 versions of strcat/strcpy/strlen and standard memmove
 libc_bionic_src_files_arm += \
+    arch-arm/cortex-a15/bionic/stpcpy.S \
     arch-arm/cortex-a15/bionic/strcat.S \
     arch-arm/cortex-a15/bionic/strcpy.S \
     arch-arm/cortex-a15/bionic/strlen.S \
+    bionic/memmove.c \

libc/arch-arm/syscalls/__accept4.S

@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(accept4)
+ENTRY(__accept4)
     mov     ip, r7
     ldr     r7, =__NR_accept4
     swi     #0
@@ -10,5 +10,5 @@ ENTRY(accept4)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
-END(accept4)
+    b       __set_errno_internal
+END(__accept4)

libc/arch-arm/syscalls/__arm_fadvise64_64.S

@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(perf_event_open)
+ENTRY(__arm_fadvise64_64)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
     .cfi_def_cfa_offset 16
@@ -11,12 +11,12 @@ ENTRY(perf_event_open)
     .cfi_rel_offset r6, 8
     .cfi_rel_offset r7, 12
     ldmfd   ip, {r4, r5, r6}
-    ldr     r7, =__NR_perf_event_open
+    ldr     r7, =__NR_arm_fadvise64_64
     swi     #0
     ldmfd   sp!, {r4, r5, r6, r7}
     .cfi_def_cfa_offset 0
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
-END(perf_event_open)
+    b       __set_errno_internal
+END(__arm_fadvise64_64)

libc/arch-arm/syscalls/__brk.S

@@ -10,5 +10,5 @@ ENTRY(__brk)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__brk)

libc/arch-arm/syscalls/__clock_nanosleep.S

@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(clock_nanosleep)
+ENTRY(__clock_nanosleep)
     mov     ip, r7
     ldr     r7, =__NR_clock_nanosleep
     swi     #0
@@ -10,5 +10,5 @@ ENTRY(clock_nanosleep)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
-END(clock_nanosleep)
+    b       __set_errno_internal
+END(__clock_nanosleep)

libc/arch-arm/syscalls/__connect.S

@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(connect)
+ENTRY(__connect)
     mov     ip, r7
     ldr     r7, =__NR_connect
     swi     #0
@@ -10,5 +10,5 @@ ENTRY(connect)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
-END(connect)
+    b       __set_errno_internal
+END(__connect)

libc/arch-arm/syscalls/__epoll_pwait.S

@@ -18,5 +18,5 @@ ENTRY(__epoll_pwait)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__epoll_pwait)

libc/arch-arm/syscalls/__exit.S

@@ -10,5 +10,5 @@ ENTRY(__exit)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__exit)

libc/arch-arm/syscalls/__fcntl64.S

@@ -10,5 +10,5 @@ ENTRY(__fcntl64)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__fcntl64)

libc/arch-arm/syscalls/__fstatfs64.S

@@ -10,5 +10,5 @@ ENTRY(__fstatfs64)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__fstatfs64)

libc/arch-arm/syscalls/__getcpu.S

@@ -10,5 +10,5 @@ ENTRY(__getcpu)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__getcpu)

libc/arch-arm/syscalls/__getcwd.S

@@ -10,5 +10,5 @@ ENTRY(__getcwd)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__getcwd)

libc/arch-arm/syscalls/__getdents64.S

@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(getdents)
+ENTRY(__getdents64)
     mov     ip, r7
     ldr     r7, =__NR_getdents64
     swi     #0
@@ -10,5 +10,5 @@ ENTRY(getdents)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
-END(getdents)
+    b       __set_errno_internal
+END(__getdents64)

libc/arch-arm/syscalls/__getpid.S

@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(getpid)
+ENTRY(__getpid)
     mov     ip, r7
     ldr     r7, =__NR_getpid
     swi     #0
@@ -10,5 +10,5 @@ ENTRY(getpid)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
-END(getpid)
+    b       __set_errno_internal
+END(__getpid)

libc/arch-arm/syscalls/__getpriority.S

@@ -10,5 +10,5 @@ ENTRY(__getpriority)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__getpriority)

libc/arch-arm/syscalls/__ioctl.S

@@ -10,5 +10,5 @@ ENTRY(__ioctl)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__ioctl)

libc/arch-arm/syscalls/__llseek.S

@@ -18,5 +18,5 @@ ENTRY(__llseek)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__llseek)

libc/arch-arm/syscalls/__mmap2.S

@@ -18,5 +18,5 @@ ENTRY(__mmap2)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__mmap2)

libc/arch-arm/syscalls/__openat.S

@@ -10,5 +10,5 @@ ENTRY(__openat)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__openat)

libc/arch-arm/syscalls/__ppoll.S

@@ -18,5 +18,5 @@ ENTRY(__ppoll)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__ppoll)

libc/arch-arm/syscalls/__pselect6.S

@@ -18,5 +18,5 @@ ENTRY(__pselect6)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__pselect6)

libc/arch-arm/syscalls/__ptrace.S

@@ -10,5 +10,5 @@ ENTRY(__ptrace)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__ptrace)

libc/arch-arm/syscalls/__reboot.S

@@ -10,5 +10,5 @@ ENTRY(__reboot)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__reboot)

libc/arch-arm/syscalls/__rt_sigaction.S

@@ -10,5 +10,5 @@ ENTRY(__rt_sigaction)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__rt_sigaction)

libc/arch-arm/syscalls/__rt_sigpending.S

@@ -10,5 +10,5 @@ ENTRY(__rt_sigpending)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__rt_sigpending)

libc/arch-arm/syscalls/__rt_sigprocmask.S

@@ -10,5 +10,5 @@ ENTRY(__rt_sigprocmask)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__rt_sigprocmask)

libc/arch-arm/syscalls/__rt_sigsuspend.S

@@ -10,5 +10,5 @@ ENTRY(__rt_sigsuspend)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__rt_sigsuspend)

libc/arch-arm/syscalls/__rt_sigtimedwait.S

@@ -10,5 +10,5 @@ ENTRY(__rt_sigtimedwait)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__rt_sigtimedwait)

libc/arch-arm/syscalls/__sched_getaffinity.S

@@ -10,5 +10,5 @@ ENTRY(__sched_getaffinity)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__sched_getaffinity)

libc/arch-arm/syscalls/__set_tid_address.S

@@ -10,5 +10,5 @@ ENTRY(__set_tid_address)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__set_tid_address)

libc/arch-arm/syscalls/__set_tls.S

@@ -10,5 +10,5 @@ ENTRY(__set_tls)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__set_tls)

libc/arch-arm/syscalls/__sigaction.S

@@ -10,5 +10,5 @@ ENTRY(__sigaction)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__sigaction)

libc/arch-arm/syscalls/__signalfd4.S

@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(signalfd4)
+ENTRY(__signalfd4)
     mov     ip, r7
     ldr     r7, =__NR_signalfd4
     swi     #0
@@ -10,5 +10,5 @@ ENTRY(signalfd4)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
-END(signalfd4)
+    b       __set_errno_internal
+END(__signalfd4)

libc/arch-arm/syscalls/__socket.S

@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(socket)
+ENTRY(__socket)
     mov     ip, r7
     ldr     r7, =__NR_socket
     swi     #0
@@ -10,5 +10,5 @@ ENTRY(socket)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
-END(socket)
+    b       __set_errno_internal
+END(__socket)

libc/arch-arm/syscalls/__statfs64.S

@@ -10,5 +10,5 @@ ENTRY(__statfs64)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__statfs64)

libc/arch-arm/syscalls/__timer_create.S

@@ -10,5 +10,5 @@ ENTRY(__timer_create)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__timer_create)

libc/arch-arm/syscalls/__timer_delete.S

@@ -10,5 +10,5 @@ ENTRY(__timer_delete)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__timer_delete)

libc/arch-arm/syscalls/__timer_getoverrun.S

@@ -10,5 +10,5 @@ ENTRY(__timer_getoverrun)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__timer_getoverrun)

libc/arch-arm/syscalls/__timer_gettime.S

@@ -10,5 +10,5 @@ ENTRY(__timer_gettime)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__timer_gettime)

libc/arch-arm/syscalls/__timer_settime.S

@@ -10,5 +10,5 @@ ENTRY(__timer_settime)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__timer_settime)

libc/arch-arm/syscalls/__waitid.S

@@ -18,5 +18,5 @@ ENTRY(__waitid)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(__waitid)

libc/arch-arm/syscalls/_exit.S

@@ -10,7 +10,7 @@ ENTRY(_exit)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(_exit)
 
     .globl _Exit

libc/arch-arm/syscalls/acct.S

@@ -10,5 +10,5 @@ ENTRY(acct)
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
-    b       __set_errno
+    b       __set_errno_internal
 END(acct)