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tools/nolibc: aarch64: add stackprotector support

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Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Thomas Weißschuh
2023-04-17 18:01:33 +02:00
committed by Paul E. McKenney
parent 443de90314
commit c1e30f7d38
2 changed files with 7 additions and 1 deletions
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7
tools/include/nolibc/arch-aarch64.h
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@@ -172,10 +172,15 @@ struct sys_stat_struct {
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
#define __ARCH_SUPPORTS_STACK_PROTECTOR
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void)
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)
{
__asm__ volatile (
#ifdef NOLIBC_STACKPROTECTOR
"bl __stack_chk_init\n" /* initialize stack protector */
#endif
"ldr x0, [sp]\n" /* argc (x0) was in the stack */
"add x1, sp, 8\n" /* argv (x1) = sp */
"lsl x2, x0, 3\n" /* envp (x2) = 8*argc ... */