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Fix long lines and replace macros with functions.

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Change-Id: I4e1cab488d5b2c8e4289da617350a86e72a4ba12
This commit is contained in:
Dmitriy Ivanov 2015-03-30 18:43:38 -07:00
parent 16c7721279
commit 20d89cb5b0
7 changed files with 153 additions and 93 deletions
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2
linker/debugger.cpp
View File

@ -221,7 +221,7 @@ static void send_debuggerd_packet(siginfo_t* info) {
if (ret != 0) {
if (ret == EBUSY) {
__libc_format_log(ANDROID_LOG_INFO, "libc",
"Another thread has contacted debuggerd first, stop and wait for process to die.");
"Another thread contacted debuggerd first; not contacting debuggerd.");
// This will never complete since the lock is never released.
pthread_mutex_lock(&crash_mutex);
} else {

140
linker/linker.cpp
View File

@ -140,10 +140,13 @@ size_t linker_get_error_buffer_size() {
// This function is an empty stub where GDB locates a breakpoint to get notified
// about linker activity.
extern "C" void __attribute__((noinline)) __attribute__((visibility("default"))) rtld_db_dlactivity();
extern "C"
void __attribute__((noinline)) __attribute__((visibility("default"))) rtld_db_dlactivity();
static pthread_mutex_t g__r_debug_mutex = PTHREAD_MUTEX_INITIALIZER;
static r_debug _r_debug = {1, nullptr, reinterpret_cast<uintptr_t>(&rtld_db_dlactivity), r_debug::RT_CONSISTENT, 0};
static r_debug _r_debug =
{1, nullptr, reinterpret_cast<uintptr_t>(&rtld_db_dlactivity), r_debug::RT_CONSISTENT, 0};
static link_map* r_debug_tail = 0;
static void insert_soinfo_into_debug_map(soinfo* info) {
@ -233,7 +236,8 @@ void SoinfoListAllocator::free(LinkedListEntry<soinfo>* entry) {
g_soinfo_links_allocator.free(entry);
}
static soinfo* soinfo_alloc(const char* name, struct stat* file_stat, off64_t file_offset, uint32_t rtld_flags) {
static soinfo* soinfo_alloc(const char* name, struct stat* file_stat,
off64_t file_offset, uint32_t rtld_flags) {
if (strlen(name) >= SOINFO_NAME_LEN) {
DL_ERR("library name \"%s\" too long", name);
return nullptr;
@ -434,7 +438,8 @@ ElfW(Sym)* soinfo::elf_lookup(SymbolName& symbol_name) {
for (uint32_t n = bucket_[hash % nbucket_]; n != 0; n = chain_[n]) {
ElfW(Sym)* s = symtab_ + n;
if (strcmp(get_string(s->st_name), symbol_name.get_name()) == 0 && is_symbol_global_and_defined(this, s)) {
if (strcmp(get_string(s->st_name), symbol_name.get_name()) == 0 &&
is_symbol_global_and_defined(this, s)) {
TRACE_TYPE(LOOKUP, "FOUND %s in %s (%p) %zd",
symbol_name.get_name(), name, reinterpret_cast<void*>(s->st_value),
static_cast<size_t>(s->st_size));
@ -448,7 +453,8 @@ ElfW(Sym)* soinfo::elf_lookup(SymbolName& symbol_name) {
return nullptr;
}
soinfo::soinfo(const char* name, const struct stat* file_stat, off64_t file_offset, int rtld_flags) {
soinfo::soinfo(const char* name, const struct stat* file_stat,
off64_t file_offset, int rtld_flags) {
memset(this, 0, sizeof(*this));
strlcpy(this->name, name, sizeof(this->name));
@ -1002,7 +1008,8 @@ static soinfo* load_library(LoadTaskList& load_tasks,
return nullptr;
}
if (file_offset >= file_stat.st_size) {
DL_ERR("file offset for the library \"%s\" >= file size: %" PRId64 " >= %" PRId64, name, file_offset, file_stat.st_size);
DL_ERR("file offset for the library \"%s\" >= file size: %" PRId64 " >= %" PRId64,
name, file_offset, file_stat.st_size);
return nullptr;
}
@ -1014,7 +1021,8 @@ static soinfo* load_library(LoadTaskList& load_tasks,
si->get_st_dev() == file_stat.st_dev &&
si->get_st_ino() == file_stat.st_ino &&
si->get_file_offset() == file_offset) {
TRACE("library \"%s\" is already loaded under different name/path \"%s\" - will return existing soinfo", name, si->name);
TRACE("library \"%s\" is already loaded under different name/path \"%s\" - "
"will return existing soinfo", name, si->name);
return si;
}
}
@ -1067,7 +1075,8 @@ static soinfo *find_loaded_library_by_soname(const char* name) {
return nullptr;
}
static soinfo* find_library_internal(LoadTaskList& load_tasks, const char* name, int rtld_flags, const android_dlextinfo* extinfo) {
static soinfo* find_library_internal(LoadTaskList& load_tasks, const char* name,
int rtld_flags, const android_dlextinfo* extinfo) {
soinfo* si = find_loaded_library_by_soname(name);
// Library might still be loaded, the accurate detection
@ -1141,7 +1150,8 @@ static bool find_libraries(soinfo* start_with, const char* const library_names[]
});
// Step 1: load and pre-link all DT_NEEDED libraries in breadth first order.
for (LoadTask::unique_ptr task(load_tasks.pop_front()); task.get() != nullptr; task.reset(load_tasks.pop_front())) {
for (LoadTask::unique_ptr task(load_tasks.pop_front());
task.get() != nullptr; task.reset(load_tasks.pop_front())) {
soinfo* si = find_library_internal(load_tasks, task->get_name(), rtld_flags, extinfo);
if (si == nullptr) {
return false;
@ -1320,8 +1330,8 @@ void do_android_get_LD_LIBRARY_PATH(char* buffer, size_t buffer_size) {
// snprintf again.
size_t required_len = strlen(kDefaultLdPaths[0]) + strlen(kDefaultLdPaths[1]) + 2;
if (buffer_size < required_len) {
__libc_fatal("android_get_LD_LIBRARY_PATH failed, buffer too small: buffer len %zu, required len %zu",
buffer_size, required_len);
__libc_fatal("android_get_LD_LIBRARY_PATH failed, buffer too small: "
"buffer len %zu, required len %zu", buffer_size, required_len);
}
char* end = stpcpy(buffer, kDefaultLdPaths[0]);
*end = ':';
@ -1344,7 +1354,8 @@ soinfo* do_dlopen(const char* name, int flags, const android_dlextinfo* extinfo)
}
if ((extinfo->flags & ANDROID_DLEXT_USE_LIBRARY_FD) == 0 &&
(extinfo->flags & ANDROID_DLEXT_USE_LIBRARY_FD_OFFSET) != 0) {
DL_ERR("invalid extended flag combination (ANDROID_DLEXT_USE_LIBRARY_FD_OFFSET without ANDROID_DLEXT_USE_LIBRARY_FD): 0x%" PRIx64, extinfo->flags);
DL_ERR("invalid extended flag combination (ANDROID_DLEXT_USE_LIBRARY_FD_OFFSET without "
"ANDROID_DLEXT_USE_LIBRARY_FD): 0x%" PRIx64, extinfo->flags);
return nullptr;
}
}
@ -1366,7 +1377,8 @@ static ElfW(Addr) call_ifunc_resolver(ElfW(Addr) resolver_addr) {
typedef ElfW(Addr) (*ifunc_resolver_t)(void);
ifunc_resolver_t ifunc_resolver = reinterpret_cast<ifunc_resolver_t>(resolver_addr);
ElfW(Addr) ifunc_addr = ifunc_resolver();
TRACE_TYPE(RELO, "Called ifunc_resolver@%p. The result is %p", ifunc_resolver, reinterpret_cast<void*>(ifunc_addr));
TRACE_TYPE(RELO, "Called ifunc_resolver@%p. The result is %p",
ifunc_resolver, reinterpret_cast<void*>(ifunc_addr));
return ifunc_addr;
}
@ -1378,7 +1390,8 @@ static ElfW(Addr) get_addend(ElfW(Rela)* rela, ElfW(Addr) reloc_addr __unused) {
}
#else
static ElfW(Addr) get_addend(ElfW(Rel)* rel, ElfW(Addr) reloc_addr) {
if (ELFW(R_TYPE)(rel->r_info) == R_GENERIC_RELATIVE || ELFW(R_TYPE)(rel->r_info) == R_GENERIC_IRELATIVE) {
if (ELFW(R_TYPE)(rel->r_info) == R_GENERIC_RELATIVE ||
ELFW(R_TYPE)(rel->r_info) == R_GENERIC_IRELATIVE) {
return *reinterpret_cast<ElfW(Addr)*>(reloc_addr);
}
return 0;
@ -1386,7 +1399,8 @@ static ElfW(Addr) get_addend(ElfW(Rel)* rel, ElfW(Addr) reloc_addr) {
#endif
template<typename ElfRelIteratorT>
bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& global_group, const soinfo_list_t& local_group) {
bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& global_group,
const soinfo_list_t& local_group) {
for (size_t idx = 0; rel_iterator.has_next(); ++idx) {
const auto rel = rel_iterator.next();
if (rel == nullptr) {
@ -1523,15 +1537,18 @@ bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& globa
MARK(rel->r_offset);
TRACE_TYPE(RELO, "RELO ABS32 %16llx <- %16llx %s\n",
reloc, (sym_addr + addend), sym_name);
if ((static_cast<ElfW(Addr)>(INT32_MIN) <= (*reinterpret_cast<ElfW(Addr)*>(reloc) + (sym_addr + addend))) &&
((*reinterpret_cast<ElfW(Addr)*>(reloc) + (sym_addr + addend)) <= static_cast<ElfW(Addr)>(UINT32_MAX))) {
*reinterpret_cast<ElfW(Addr)*>(reloc) += (sym_addr + addend);
} else {
DL_ERR("0x%016llx out of range 0x%016llx to 0x%016llx",
(*reinterpret_cast<ElfW(Addr)*>(reloc) + (sym_addr + addend)),
static_cast<ElfW(Addr)>(INT32_MIN),
static_cast<ElfW(Addr)>(UINT32_MAX));
return false;
{
const ElfW(Addr) reloc_value = *reinterpret_cast<ElfW(Addr)*>(reloc);
const ElfW(Addr) min_value = static_cast<ElfW(Addr)>(INT32_MIN);
const ElfW(Addr) max_value = static_cast<ElfW(Addr)>(UINT32_MAX);
if ((min_value <= (reloc_value + (sym_addr + addend))) &&
((reloc_value + (sym_addr + addend)) <= max_value)) {
*reinterpret_cast<ElfW(Addr)*>(reloc) += (sym_addr + addend);
} else {
DL_ERR("0x%016llx out of range 0x%016llx to 0x%016llx",
(reloc_value + (sym_addr + addend)), min_value, max_value);
return false;
}
}
break;
case R_AARCH64_ABS16:
@ -1539,15 +1556,18 @@ bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& globa
MARK(rel->r_offset);
TRACE_TYPE(RELO, "RELO ABS16 %16llx <- %16llx %s\n",
reloc, (sym_addr + addend), sym_name);
if ((static_cast<ElfW(Addr)>(INT16_MIN) <= (*reinterpret_cast<ElfW(Addr)*>(reloc) + (sym_addr + addend))) &&
((*reinterpret_cast<ElfW(Addr)*>(reloc) + (sym_addr + addend)) <= static_cast<ElfW(Addr)>(UINT16_MAX))) {
*reinterpret_cast<ElfW(Addr)*>(reloc) += (sym_addr + addend);
} else {
DL_ERR("0x%016llx out of range 0x%016llx to 0x%016llx",
(*reinterpret_cast<ElfW(Addr)*>(reloc) + (sym_addr + addend)),
static_cast<ElfW(Addr)>(INT16_MIN),
static_cast<ElfW(Addr)>(UINT16_MAX));
return false;
{
const ElfW(Addr) reloc_value = *reinterpret_cast<ElfW(Addr)*>(reloc);
const ElfW(Addr) min_value = static_cast<ElfW(Addr)>(INT16_MIN);
const ElfW(Addr) max_value = static_cast<ElfW(Addr)>(UINT16_MAX);
if ((min_value <= (reloc_value + (sym_addr + addend))) &&
((reloc_value + (sym_addr + addend)) <= max_value)) {
*reinterpret_cast<ElfW(Addr)*>(reloc) += (sym_addr + addend);
} else {
DL_ERR("0x%016llx out of range 0x%016llx to 0x%016llx",
reloc_value + (sym_addr + addend), min_value, max_value);
return false;
}
}
break;
case R_AARCH64_PREL64:
@ -1562,15 +1582,18 @@ bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& globa
MARK(rel->r_offset);
TRACE_TYPE(RELO, "RELO REL32 %16llx <- %16llx - %16llx %s\n",
reloc, (sym_addr + addend), rel->r_offset, sym_name);
if ((static_cast<ElfW(Addr)>(INT32_MIN) <= (*reinterpret_cast<ElfW(Addr)*>(reloc) + ((sym_addr + addend) - rel->r_offset))) &&
((*reinterpret_cast<ElfW(Addr)*>(reloc) + ((sym_addr + addend) - rel->r_offset)) <= static_cast<ElfW(Addr)>(UINT32_MAX))) {
*reinterpret_cast<ElfW(Addr)*>(reloc) += ((sym_addr + addend) - rel->r_offset);
} else {
DL_ERR("0x%016llx out of range 0x%016llx to 0x%016llx",
(*reinterpret_cast<ElfW(Addr)*>(reloc) + ((sym_addr + addend) - rel->r_offset)),
static_cast<ElfW(Addr)>(INT32_MIN),
static_cast<ElfW(Addr)>(UINT32_MAX));
return false;
{
const ElfW(Addr) reloc_value = *reinterpret_cast<ElfW(Addr)*>(reloc);
const ElfW(Addr) min_value = static_cast<ElfW(Addr)>(INT32_MIN);
const ElfW(Addr) max_value = static_cast<ElfW(Addr)>(UINT32_MAX);
if ((min_value <= (reloc_value + ((sym_addr + addend) - rel->r_offset))) &&
((reloc_value + ((sym_addr + addend) - rel->r_offset)) <= max_value)) {
*reinterpret_cast<ElfW(Addr)*>(reloc) += ((sym_addr + addend) - rel->r_offset);
} else {
DL_ERR("0x%016llx out of range 0x%016llx to 0x%016llx",
reloc_value + ((sym_addr + addend) - rel->r_offset), min_value, max_value);
return false;
}
}
break;
case R_AARCH64_PREL16:
@ -1578,15 +1601,18 @@ bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& globa
MARK(rel->r_offset);
TRACE_TYPE(RELO, "RELO REL16 %16llx <- %16llx - %16llx %s\n",
reloc, (sym_addr + addend), rel->r_offset, sym_name);
if ((static_cast<ElfW(Addr)>(INT16_MIN) <= (*reinterpret_cast<ElfW(Addr)*>(reloc) + ((sym_addr + addend) - rel->r_offset))) &&
((*reinterpret_cast<ElfW(Addr)*>(reloc) + ((sym_addr + addend) - rel->r_offset)) <= static_cast<ElfW(Addr)>(UINT16_MAX))) {
*reinterpret_cast<ElfW(Addr)*>(reloc) += ((sym_addr + addend) - rel->r_offset);
} else {
DL_ERR("0x%016llx out of range 0x%016llx to 0x%016llx",
(*reinterpret_cast<ElfW(Addr)*>(reloc) + ((sym_addr + addend) - rel->r_offset)),
static_cast<ElfW(Addr)>(INT16_MIN),
static_cast<ElfW(Addr)>(UINT16_MAX));
return false;
{
const ElfW(Addr) reloc_value = *reinterpret_cast<ElfW(Addr)*>(reloc);
const ElfW(Addr) min_value = static_cast<ElfW(Addr)>(INT16_MIN);
const ElfW(Addr) max_value = static_cast<ElfW(Addr)>(UINT16_MAX);
if ((min_value <= (reloc_value + ((sym_addr + addend) - rel->r_offset))) &&
((reloc_value + ((sym_addr + addend) - rel->r_offset)) <= max_value)) {
*reinterpret_cast<ElfW(Addr)*>(reloc) += ((sym_addr + addend) - rel->r_offset);
} else {
DL_ERR("0x%016llx out of range 0x%016llx to 0x%016llx",
reloc_value + ((sym_addr + addend) - rel->r_offset), min_value, max_value);
return false;
}
}
break;
@ -1683,7 +1709,8 @@ bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& globa
}
#endif // !defined(__mips__)
void soinfo::call_array(const char* array_name __unused, linker_function_t* functions, size_t count, bool reverse) {
void soinfo::call_array(const char* array_name __unused, linker_function_t* functions,
size_t count, bool reverse) {
if (functions == nullptr) {
return;
}
@ -2056,10 +2083,12 @@ bool soinfo::prelink_image() {
gnu_bloom_filter_ = reinterpret_cast<ElfW(Addr)*>(load_bias + d->d_un.d_ptr + 16);
gnu_bucket_ = reinterpret_cast<uint32_t*>(gnu_bloom_filter_ + gnu_maskwords_);
// amend chain for symndx = header[1]
gnu_chain_ = gnu_bucket_ + gnu_nbucket_ - reinterpret_cast<uint32_t*>(load_bias + d->d_un.d_ptr)[1];
gnu_chain_ = gnu_bucket_ + gnu_nbucket_ -
reinterpret_cast<uint32_t*>(load_bias + d->d_un.d_ptr)[1];
if (!powerof2(gnu_maskwords_)) {
DL_ERR("invalid maskwords for gnu_hash = 0x%x, in \"%s\" expecting power to two", gnu_maskwords_, name);
DL_ERR("invalid maskwords for gnu_hash = 0x%x, in \"%s\" expecting power to two",
gnu_maskwords_, name);
return false;
}
--gnu_maskwords_;
@ -2316,7 +2345,8 @@ bool soinfo::prelink_image() {
case DT_MIPS_RLD_MAP2:
// Set the DT_MIPS_RLD_MAP2 entry to the address of _r_debug for GDB.
{
r_debug** dp = reinterpret_cast<r_debug**>(reinterpret_cast<ElfW(Addr)>(d) + d->d_un.d_val);
r_debug** dp = reinterpret_cast<r_debug**>(
reinterpret_cast<ElfW(Addr)>(d) + d->d_un.d_val);
*dp = &_r_debug;
}
break;

6
linker/linker.h
View File

@ -238,7 +238,8 @@ struct soinfo {
void call_destructors();
void call_pre_init_constructors();
bool prelink_image();
bool link_image(const soinfo_list_t& global_group, const soinfo_list_t& local_group, const android_dlextinfo* extinfo);
bool link_image(const soinfo_list_t& global_group, const soinfo_list_t& local_group,
const android_dlextinfo* extinfo);
void add_child(soinfo* child);
void remove_all_links();
@ -289,7 +290,8 @@ struct soinfo {
void call_array(const char* array_name, linker_function_t* functions, size_t count, bool reverse);
void call_function(const char* function_name, linker_function_t function);
template<typename ElfRelIteratorT>
bool relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& global_group, const soinfo_list_t& local_group);
bool relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& global_group,
const soinfo_list_t& local_group);
private:
// This part of the structure is only available

7
linker/linker_mips.cpp
View File

@ -47,7 +47,9 @@ template bool soinfo::relocate<packed_reloc_iterator<leb128_decoder>>(
const soinfo_list_t& local_group);
template <typename ElfRelIteratorT>
bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& global_group, const soinfo_list_t& local_group) {
bool soinfo::relocate(ElfRelIteratorT&& rel_iterator,
const soinfo_list_t& global_group,
const soinfo_list_t& local_group) {
for (size_t idx = 0; rel_iterator.has_next(); ++idx) {
const auto rel = rel_iterator.next();
@ -115,7 +117,8 @@ bool soinfo::relocate(ElfRelIteratorT&& rel_iterator, const soinfo_list_t& globa
return true;
}
bool soinfo::mips_relocate_got(const soinfo_list_t& global_group, const soinfo_list_t& local_group) {
bool soinfo::mips_relocate_got(const soinfo_list_t& global_group,
const soinfo_list_t& local_group) {
ElfW(Addr)** got = plt_got_;
if (got == nullptr) {
return true;

29
linker/linker_phdr.cpp
View File

@ -240,7 +240,8 @@ bool ElfReader::ReadProgramHeader() {
phdr_size_ = page_max - page_min;
void* mmap_result = mmap64(nullptr, phdr_size_, PROT_READ, MAP_PRIVATE, fd_, file_offset_ + page_min);
void* mmap_result =
mmap64(nullptr, phdr_size_, PROT_READ, MAP_PRIVATE, fd_, file_offset_ + page_min);
if (mmap_result == MAP_FAILED) {
DL_ERR("\"%s\" phdr mmap failed: %s", name_, strerror(errno));
return false;
@ -449,7 +450,8 @@ static int _phdr_table_set_load_prot(const ElfW(Phdr)* phdr_table, size_t phdr_c
* Return:
* 0 on error, -1 on failure (error code in errno).
*/
int phdr_table_protect_segments(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias) {
int phdr_table_protect_segments(const ElfW(Phdr)* phdr_table,
size_t phdr_count, ElfW(Addr) load_bias) {
return _phdr_table_set_load_prot(phdr_table, phdr_count, load_bias, 0);
}
@ -469,7 +471,8 @@ int phdr_table_protect_segments(const ElfW(Phdr)* phdr_table, size_t phdr_count,
* Return:
* 0 on error, -1 on failure (error code in errno).
*/
int phdr_table_unprotect_segments(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias) {
int phdr_table_unprotect_segments(const ElfW(Phdr)* phdr_table,
size_t phdr_count, ElfW(Addr) load_bias) {
return _phdr_table_set_load_prot(phdr_table, phdr_count, load_bias, PROT_WRITE);
}
@ -531,7 +534,8 @@ static int _phdr_table_set_gnu_relro_prot(const ElfW(Phdr)* phdr_table, size_t p
* Return:
* 0 on error, -1 on failure (error code in errno).
*/
int phdr_table_protect_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias) {
int phdr_table_protect_gnu_relro(const ElfW(Phdr)* phdr_table,
size_t phdr_count, ElfW(Addr) load_bias) {
return _phdr_table_set_gnu_relro_prot(phdr_table, phdr_count, load_bias, PROT_READ);
}
@ -547,7 +551,9 @@ int phdr_table_protect_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count
* Return:
* 0 on error, -1 on failure (error code in errno).
*/
int phdr_table_serialize_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias,
int phdr_table_serialize_gnu_relro(const ElfW(Phdr)* phdr_table,
size_t phdr_count,
ElfW(Addr) load_bias,
int fd) {
const ElfW(Phdr)* phdr = phdr_table;
const ElfW(Phdr)* phdr_limit = phdr + phdr_count;
@ -592,7 +598,9 @@ int phdr_table_serialize_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_cou
* Return:
* 0 on error, -1 on failure (error code in errno).
*/
int phdr_table_map_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias,
int phdr_table_map_gnu_relro(const ElfW(Phdr)* phdr_table,
size_t phdr_count,
ElfW(Addr) load_bias,
int fd) {
// Map the file at a temporary location so we can compare its contents.
struct stat file_stat;
@ -725,11 +733,12 @@ void phdr_table_get_dynamic_section(const ElfW(Phdr)* phdr_table, size_t phdr_co
ElfW(Addr) load_bias, ElfW(Dyn)** dynamic,
ElfW(Word)* dynamic_flags) {
*dynamic = nullptr;
for (const ElfW(Phdr)* phdr = phdr_table, *phdr_limit = phdr + phdr_count; phdr < phdr_limit; phdr++) {
if (phdr->p_type == PT_DYNAMIC) {
*dynamic = reinterpret_cast<ElfW(Dyn)*>(load_bias + phdr->p_vaddr);
for (size_t i = 0; i<phdr_count; ++i) {
const ElfW(Phdr)& phdr = phdr_table[i];
if (phdr.p_type == PT_DYNAMIC) {
*dynamic = reinterpret_cast<ElfW(Dyn)*>(load_bias + phdr.p_vaddr);
if (dynamic_flags) {
*dynamic_flags = phdr->p_flags;
*dynamic_flags = phdr.p_flags;
}
return;
}

17
linker/linker_phdr.h
View File

@ -84,17 +84,20 @@ class ElfReader {
size_t phdr_table_get_load_size(const ElfW(Phdr)* phdr_table, size_t phdr_count,
ElfW(Addr)* min_vaddr = nullptr, ElfW(Addr)* max_vaddr = nullptr);
int phdr_table_protect_segments(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias);
int phdr_table_protect_segments(const ElfW(Phdr)* phdr_table,
size_t phdr_count, ElfW(Addr) load_bias);
int phdr_table_unprotect_segments(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias);
int phdr_table_unprotect_segments(const ElfW(Phdr)* phdr_table, size_t phdr_count,
ElfW(Addr) load_bias);
int phdr_table_protect_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias);
int phdr_table_protect_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count,
ElfW(Addr) load_bias);
int phdr_table_serialize_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias,
int fd);
int phdr_table_serialize_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count,
ElfW(Addr) load_bias, int fd);
int phdr_table_map_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias,
int fd);
int phdr_table_map_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count,
ElfW(Addr) load_bias, int fd);
#if defined(__arm__)
int phdr_table_get_arm_exidx(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias,

45
linker/linker_reloc_iterators.h
View File

@ -21,15 +21,10 @@
#include <string.h>
#define RELOCATION_GROUPED_BY_INFO_FLAG 1
#define RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG 2
#define RELOCATION_GROUPED_BY_ADDEND_FLAG 4
#define RELOCATION_GROUP_HAS_ADDEND_FLAG 8
#define RELOCATION_GROUPED_BY_INFO(flags) (((flags) & RELOCATION_GROUPED_BY_INFO_FLAG) != 0)
#define RELOCATION_GROUPED_BY_OFFSET_DELTA(flags) (((flags) & RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG) != 0)
#define RELOCATION_GROUPED_BY_ADDEND(flags) (((flags) & RELOCATION_GROUPED_BY_ADDEND_FLAG) != 0)
#define RELOCATION_GROUP_HAS_ADDEND(flags) (((flags) & RELOCATION_GROUP_HAS_ADDEND_FLAG) != 0)
const size_t RELOCATION_GROUPED_BY_INFO_FLAG = 1;
const size_t RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2;
const size_t RELOCATION_GROUPED_BY_ADDEND_FLAG = 4;
const size_t RELOCATION_GROUP_HAS_ADDEND_FLAG = 8;
class plain_reloc_iterator {
#if defined(USE_RELA)
@ -89,18 +84,19 @@ class packed_reloc_iterator {
}
}
if (RELOCATION_GROUPED_BY_OFFSET_DELTA(group_flags_)) {
if (is_relocation_grouped_by_offset_delta()) {
reloc_.r_offset += group_r_offset_delta_;
} else {
reloc_.r_offset += decoder_.pop_front();
}
if (!RELOCATION_GROUPED_BY_INFO(group_flags_)) {
if (!is_relocation_grouped_by_info()) {
reloc_.r_info = decoder_.pop_front();
}
#if defined(USE_RELA)
if (RELOCATION_GROUP_HAS_ADDEND(group_flags_) && !RELOCATION_GROUPED_BY_ADDEND(group_flags_)) {
if (is_relocation_group_has_addend() &&
!is_relocation_grouped_by_addend()) {
reloc_.r_addend += decoder_.pop_front();
}
#endif
@ -115,22 +111,23 @@ class packed_reloc_iterator {
group_size_ = decoder_.pop_front();
group_flags_ = decoder_.pop_front();
if (RELOCATION_GROUPED_BY_OFFSET_DELTA(group_flags_)) {
if (is_relocation_grouped_by_offset_delta()) {
group_r_offset_delta_ = decoder_.pop_front();
}
if (RELOCATION_GROUPED_BY_INFO(group_flags_)) {
if (is_relocation_grouped_by_info()) {
reloc_.r_info = decoder_.pop_front();
}
if (RELOCATION_GROUP_HAS_ADDEND(group_flags_) && RELOCATION_GROUPED_BY_ADDEND(group_flags_)) {
if (is_relocation_group_has_addend() &&
is_relocation_grouped_by_addend()) {
#if !defined(USE_RELA)
// This platform does not support rela, and yet we have it encoded in android_rel section.
DL_ERR("unexpected r_addend in android.rel section");
return false;
#else
reloc_.r_addend += decoder_.pop_front();
} else if (!RELOCATION_GROUP_HAS_ADDEND(group_flags_)) {
} else if (!is_relocation_group_has_addend()) {
reloc_.r_addend = 0;
#endif
}
@ -139,6 +136,22 @@ class packed_reloc_iterator {
return true;
}
bool is_relocation_grouped_by_info() {
return (group_flags_ & RELOCATION_GROUPED_BY_INFO_FLAG) != 0;
}
bool is_relocation_grouped_by_offset_delta() {
return (group_flags_ & RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG) != 0;
}
bool is_relocation_grouped_by_addend() {
return (group_flags_ & RELOCATION_GROUPED_BY_ADDEND_FLAG) != 0;
}
bool is_relocation_group_has_addend() {
return (group_flags_ & RELOCATION_GROUP_HAS_ADDEND_FLAG) != 0;
}
decoder_t decoder_;
size_t relocation_count_;
size_t group_size_;