6421823410
On most architectures the kernel subtracts a random offset to the stack
pointer in create_elf_tables by calling arch_align_stack before writing
the auxval table and so on. On all but x86 this doesn't cause a problem
because the random offset is less than a page, but on x86 it's up to two
pages. This means that our old technique of rounding the stack pointer
doesn't work. (Our old implementation of that technique was wrong too.)
It's also incorrect to assume that the main thread's stack base and size
are constant. Likewise to assume that the main thread has a guard page.
The main thread is not like other threads.
This patch switches to reading /proc/self/maps (and checking RLIMIT_STACK)
whenever we're asked.
Bug: 17111575
Signed-off-by: Fengwei Yin <fengwei.yin@intel.com>
(cherry picked from commit 57b7a6110e)
Change-Id: I87e679ee1c0db8092f2d1221c8e7c1461545c5a4
94 lines
3.3 KiB
Makefile
94 lines
3.3 KiB
Makefile
# arm specific configs
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# These are used by the 32-bit targets, but not the 64-bit ones.
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libc_common_src_files_arm := \
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bionic/legacy_32_bit_support.cpp \
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bionic/ndk_cruft.cpp \
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bionic/time64.c \
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upstream-openbsd/lib/libc/stdio/putw.c \
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# These are shared by all the 32-bit targets, but not the 64-bit ones.
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libc_bionic_src_files_arm := \
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bionic/mmap.cpp
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libc_common_src_files_arm += \
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bionic/memchr.c \
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bionic/memrchr.c \
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bionic/strchr.cpp \
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bionic/strnlen.c \
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bionic/strrchr.cpp \
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upstream-freebsd/lib/libc/string/wcscat.c \
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upstream-freebsd/lib/libc/string/wcschr.c \
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upstream-freebsd/lib/libc/string/wcscmp.c \
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upstream-freebsd/lib/libc/string/wcscpy.c \
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upstream-freebsd/lib/libc/string/wcslen.c \
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upstream-freebsd/lib/libc/string/wcsrchr.c \
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upstream-freebsd/lib/libc/string/wmemcmp.c \
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upstream-freebsd/lib/libc/string/wmemmove.c \
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upstream-openbsd/lib/libc/string/bcopy.c \
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upstream-openbsd/lib/libc/string/stpcpy.c \
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upstream-openbsd/lib/libc/string/stpncpy.c \
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upstream-openbsd/lib/libc/string/strlcat.c \
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upstream-openbsd/lib/libc/string/strlcpy.c \
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upstream-openbsd/lib/libc/string/strncat.c \
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upstream-openbsd/lib/libc/string/strncmp.c \
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upstream-openbsd/lib/libc/string/strncpy.c \
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# The C++ fortify function implementations for which there is an
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# arm assembler version.
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#
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# Fortify implementations of libc functions.
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# libc_common_src_files_arm +=
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# bionic/__memcpy_chk.cpp \
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# bionic/__memset_chk.cpp \
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# bionic/__strcpy_chk.cpp \
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# bionic/__strcat_chk.cpp \
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libc_common_cflags_arm := -DSOFTFLOAT
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##########################################
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### CPU specific source files
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libc_bionic_src_files_arm += \
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arch-arm/bionic/abort_arm.S \
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arch-arm/bionic/atomics_arm.c \
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arch-arm/bionic/__bionic_clone.S \
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arch-arm/bionic/_exit_with_stack_teardown.S \
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arch-arm/bionic/libgcc_compat.c \
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arch-arm/bionic/memcmp.S \
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arch-arm/bionic/_setjmp.S \
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arch-arm/bionic/setjmp.S \
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arch-arm/bionic/sigsetjmp.S \
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arch-arm/bionic/syscall.S \
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libc_arch_static_src_files_arm := arch-arm/bionic/exidx_static.c
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libc_arch_dynamic_src_files_arm := arch-arm/bionic/exidx_dynamic.c
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libc_netbsd_src_files_arm := \
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upstream-netbsd/common/lib/libc/hash/sha1/sha1.c \
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## CPU variant specific source files
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ifeq ($(strip $(TARGET_$(my_2nd_arch_prefix)CPU_VARIANT)),)
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$(warning TARGET_$(my_2nd_arch_prefix)ARCH is arm, but TARGET_$(my_2nd_arch_prefix)CPU_VARIANT is not defined)
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endif
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cpu_variant_mk := $(LOCAL_PATH)/arch-arm/$(TARGET_$(my_2nd_arch_prefix)CPU_VARIANT)/$(TARGET_$(my_2nd_arch_prefix)CPU_VARIANT).mk
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ifeq ($(wildcard $(cpu_variant_mk)),)
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$(error "TARGET_$(my_2nd_arch_prefix)CPU_VARIANT not set or set to an unknown value. Possible values are cortex-a7, cortex-a8, cortex-a9, cortex-a15, krait, denver. Use generic for devices that do not have a CPU similar to any of the supported cpu variants.")
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endif
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include $(cpu_variant_mk)
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libc_common_additional_dependencies += $(cpu_variant_mk)
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cpu_variant_mk :=
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libc_crt_target_cflags_arm := \
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-I$(LOCAL_PATH)/arch-arm/include \
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-mthumb-interwork
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libc_crt_target_so_cflags_arm :=
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libc_crt_target_crtbegin_file_arm := \
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$(LOCAL_PATH)/arch-common/bionic/crtbegin.c
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libc_crt_target_crtbegin_so_file_arm := \
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$(LOCAL_PATH)/arch-common/bionic/crtbegin_so.c
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