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35f1e82763
* configure.in: Add --enable-stackguard-randomization option.
(ENABLE_STACKGUARD_RANDOMIZE): New define.
* config.h.in (ENABLE_STACKGUARD_RANDOMIZE): Add.
* sysdeps/unix/sysv/linux/dl-osinfo.h: Include stdint.h.
(_dl_setup_stack_chk_guard): New inline function.
* sysdeps/generic/dl-osinfo.h: Include stdint.h.
(_dl_setup_stack_chk_guard): New inline function.
* elf/rtld.c (__stack_chk_guard): New variable.
(dl_main): Remove all traces of TLS_INIT_TP_EXPENSIVE.
Set __stack_chk_guard to _dl_setup_stack_chk_guard (),
use THREAD_SET_STACK_GUARD if defined.
* elf/Versions (ld): Export __stack_chk_guard@@GLIBC_2.4.
* sysdeps/generic/libc-start.c (__stack_chk_guard): New variable.
(__libc_start_main): Set __stack_chk_guard to
_dl_setup_stack_chk_guard (), use THREAD_SET_STACK_GUARD if defined.
* sysdeps/generic/libc-tls.c (__libc_setup_tls): Remove all
traces of TLS_INIT_TP_EXPENSIVE.
* debug/Versions (libc): Export __stack_chk_fail@@GLIBC_2.4.
* debug/Makefile (routines): Add stack_chk_fail.
(static-only-routines): Add stack_chk_fail_local.
* debug/stack_chk_fail_local.c: New file.
* debug/stack_chk_fail.c: New file.
* elf/Makefile: Add rules to build and run tst-stackguard1{,-static}
tests.
* elf/tst-stackguard1.c: New file.
* elf/tst-stackguard1-static.c: New file.
* elf/stackguard-macros.h: New file.
31 lines
1.1 KiB
C
31 lines
1.1 KiB
C
#include <stdint.h>
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#ifdef __i386__
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("movl %%gs:0x14, %0" : "=r" (x)); x; })
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#elif defined __x86_64__
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("movq %%fs:0x28, %0" : "=r" (x)); x; })
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#elif defined __powerpc64__
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("ld %0,-28688(13)" : "=r" (x)); x; })
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#elif defined __powerpc__
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("lwz %0,-28680(2)" : "=r" (x)); x; })
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#elif defined __sparc__ && defined __arch64__
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("ldx [%%g7+0x28], %0" : "=r" (x)); x; })
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#elif defined __sparc__
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("ld [%%g7+0x14], %0" : "=r" (x)); x; })
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#elif defined __s390x__
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("ear %0,%a0; sllg %0,%0,32; ear %0,%a1; lg %0,0x28(%0)" : "=r" (x)); x; })
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#elif defined __s390__
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("ear %0,%%a0; l %0,0x14(%0)" : "=r" (x)); x; })
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#else
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extern uintptr_t __stack_chk_guard;
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# define STACK_CHK_GUARD __stack_chk_guard
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#endif
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