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tools/nolibc: loongarch: 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 18:01:35 +02:00 committed by Paul E. McKenney
parent ed6c0d89bb
commit ca2d043714
2 changed files with 7 additions and 1 deletions
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7
tools/include/nolibc/arch-loongarch.h
View file

@ -149,6 +149,8 @@
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
#define __ARCH_SUPPORTS_STACK_PROTECTOR
#if __loongarch_grlen == 32
#define LONGLOG "2"
#define SZREG "4"
@ -170,9 +172,12 @@ const unsigned long *_auxv __attribute__((weak));
#endif
/* 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
REG_L " $a0, $sp, 0\n" /* argc (a0) was in the stack */
LONG_ADDI " $a1, $sp, "SZREG"\n" /* argv (a1) = sp + SZREG */
LONG_SLL " $a2, $a0, "LONGLOG"\n" /* envp (a2) = SZREG*argc ... */

1
tools/testing/selftests/nolibc/Makefile
View file

@ -84,6 +84,7 @@ CFLAGS_STKP_x86_64 = $(CFLAGS_STACKPROTECTOR)
CFLAGS_STKP_x86 = $(CFLAGS_STACKPROTECTOR)
CFLAGS_STKP_arm64 = $(CFLAGS_STACKPROTECTOR)
CFLAGS_STKP_arm = $(CFLAGS_STACKPROTECTOR)
CFLAGS_STKP_loongarch = $(CFLAGS_STACKPROTECTOR)
CFLAGS_s390 = -m64
CFLAGS ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 \
$(call cc-option,-fno-stack-protector) \