Commit 56d294a5 authored by Thomas Weißschuh's avatar Thomas Weißschuh Committed by Paul E. McKenney
Browse files

tools/nolibc: riscv: add stackprotector support 



Signed-off-by: default avatarThomas Weißschuh <linux@weissschuh.net>
Acked-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 3da0de37

tools/include/nolibc/arch-riscv.h

+6 −1
Original line number Diff line number Diff line
@@ -177,14 +177,19 @@ 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 (

		".option push\n"

		".option norelax\n"

		"lla   gp, __global_pointer$\n"

		".option pop\n"

#ifdef NOLIBC_STACKPROTECTOR

		"call __stack_chk_init\n"    /* initialize stack protector                          */

#endif

		REG_L" a0, 0(sp)\n"          /* argc (a0) was in the stack                          */

		"add   a1, sp, "SZREG"\n"    /* argv (a1) = sp                                      */

		"slli  a2, a0, "PTRLOG"\n"   /* envp (a2) = SZREG*argc ...                          */

tools/testing/selftests/nolibc/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ CFLAGS_STKP_x86 = $(CFLAGS_STACKPROTECTOR) 
CFLAGS_STKP_arm64 = $(CFLAGS_STACKPROTECTOR)

CFLAGS_STKP_arm = $(CFLAGS_STACKPROTECTOR)

CFLAGS_STKP_mips = $(CFLAGS_STACKPROTECTOR)

CFLAGS_STKP_riscv = $(CFLAGS_STACKPROTECTOR)

CFLAGS_STKP_loongarch = $(CFLAGS_STACKPROTECTOR)

CFLAGS_s390 = -m64

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