Commit c1e30f7d authored by Thomas Weißschuh's avatar Thomas Weißschuh Committed by Paul E. McKenney
Browse files

tools/nolibc: aarch64: add stackprotector support 



Signed-off-by: default avatarThomas Weißschuh <linux@weissschuh.net>
Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 443de903

tools/include/nolibc/arch-aarch64.h

+6 −1
Original line number Diff line number Diff line
@@ -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 ...                              */

tools/testing/selftests/nolibc/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -82,6 +82,7 @@ CFLAGS_STACKPROTECTOR = -DNOLIBC_STACKPROTECTOR \ 
CFLAGS_STKP_i386 = $(CFLAGS_STACKPROTECTOR)

CFLAGS_STKP_x86_64 = $(CFLAGS_STACKPROTECTOR)

CFLAGS_STKP_x86 = $(CFLAGS_STACKPROTECTOR)

CFLAGS_STKP_arm64 = $(CFLAGS_STACKPROTECTOR)

CFLAGS_s390 = -m64

CFLAGS  ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 \

		$(call cc-option,-fno-stack-protector) \