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 57b7a6110e7e8b446fc23cce4765ff625ee0a105) Change-Id: I87e679ee1c0db8092f2d1221c8e7c1461545c5a4
62 lines
1.8 KiB
Makefile
62 lines
1.8 KiB
Makefile
# x86 specific configs
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# These are shared by all the 32-bit targets, but not the 64-bit ones.
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libc_common_src_files_x86 := \
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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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# Fortify implementations of libc functions.
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libc_common_src_files_x86 += \
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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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upstream-freebsd/lib/libc/string/wmemmove.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_x86 := \
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bionic/mmap.cpp
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##########################################
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### CPU specific source files
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libc_bionic_src_files_x86 += \
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arch-x86/bionic/__bionic_clone.S \
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arch-x86/bionic/_exit_with_stack_teardown.S \
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arch-x86/bionic/_setjmp.S \
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arch-x86/bionic/setjmp.S \
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arch-x86/bionic/__set_tls.c \
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arch-x86/bionic/sigsetjmp.S \
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arch-x86/bionic/syscall.S \
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arch-x86/bionic/vfork.S \
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## ARCH variant specific source files
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arch_variant_mk := $(LOCAL_PATH)/arch-x86/$(TARGET_ARCH_VARIANT)/$(TARGET_ARCH_VARIANT).mk
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ifeq ($(wildcard $(arch_variant_mk)),)
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arch_variant_mk := $(LOCAL_PATH)/arch-x86/generic/generic.mk
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endif
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include $(arch_variant_mk)
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libc_common_additional_dependencies += $(arch_variant_mk)
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libc_netbsd_src_files_x86 := \
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upstream-netbsd/common/lib/libc/hash/sha1/sha1.c \
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arch_variant_mk :=
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libc_crt_target_cflags_x86 := \
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-m32 \
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-I$(LOCAL_PATH)/arch-x86/include
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libc_crt_target_ldflags_x86 := -melf_i386
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libc_crt_target_crtbegin_file_x86 := \
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$(LOCAL_PATH)/arch-common/bionic/crtbegin.c
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libc_crt_target_crtbegin_so_file_x86 := \
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$(LOCAL_PATH)/arch-common/bionic/crtbegin_so.c
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libc_crt_target_so_cflags_x86 := \
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-fPIC
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