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tools/nolibc: stackprotector.h: make __stack_chk_init static

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This allows to generate smaller text/data/dec size.

As the _start_c() function added by crt.h, __stack_chk_init() is called
from _start_c() instead of the assembly _start. So, it is able to mark
it with static now.

Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Zhangjin Wu 2023-08-05 14:12:06 +08:00 committed by Willy Tarreau
parent ce1bb82b1c
commit dcb677c3d3
2 changed files with 3 additions and 4 deletions
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2
tools/include/nolibc/crt.h
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@ -10,7 +10,7 @@
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
void __stack_chk_init(void);
static void __stack_chk_init(void);
static void exit(int);
void _start_c(long *sp)

5
tools/include/nolibc/stackprotector.h
View file

@ -37,8 +37,7 @@ void __stack_chk_fail_local(void)
__attribute__((weak,section(".data.nolibc_stack_chk")))
uintptr_t __stack_chk_guard;
__attribute__((weak,section(".text.nolibc_stack_chk"))) __no_stack_protector
void __stack_chk_init(void)
static __no_stack_protector void __stack_chk_init(void)
{
my_syscall3(__NR_getrandom, &__stack_chk_guard, sizeof(__stack_chk_guard), 0);
/* a bit more randomness in case getrandom() fails, ensure the guard is never 0 */
@ -46,7 +45,7 @@ void __stack_chk_init(void)
__stack_chk_guard ^= (uintptr_t) &__stack_chk_guard;
}
#else /* !defined(_NOLIBC_STACKPROTECTOR) */
__inline__ void __stack_chk_init(void) {}
static void __stack_chk_init(void) {}
#endif /* defined(_NOLIBC_STACKPROTECTOR) */
#endif /* _NOLIBC_STACKPROTECTOR_H */