Commit e76b70de authored by Thomas Weißschuh's avatar Thomas Weißschuh Committed by Paul E. McKenney
Browse files

tools/nolibc: fix segfaults on compilers without attribute no_stack_protector 



Not all compilers, notably GCC < 10, have support for
__attribute__((no_stack_protector)).
Fall back to a mechanism that also works there.

Tested with GCC 9.5.0 from kernel.org crosstools.

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 0093c2da

tools/include/nolibc/arch-aarch64.h

+1 −1
Original line number Diff line number Diff line
@@ -175,7 +175,7 @@ char **environ __attribute__((weak)); 
const unsigned long *_auxv __attribute__((weak));



/* startup code */

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)

{

	__asm__ volatile (

#ifdef _NOLIBC_STACKPROTECTOR

tools/include/nolibc/arch-arm.h

+1 −1
Original line number Diff line number Diff line
@@ -202,7 +202,7 @@ char **environ __attribute__((weak)); 
const unsigned long *_auxv __attribute__((weak));



/* startup code */

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)

{

	__asm__ volatile (

#ifdef _NOLIBC_STACKPROTECTOR

tools/include/nolibc/arch-i386.h

+1 −1
Original line number Diff line number Diff line
@@ -190,7 +190,7 @@ const unsigned long *_auxv __attribute__((weak)); 
 * 2) The deepest stack frame should be set to zero

 *

 */

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)

{

	__asm__ volatile (

#ifdef _NOLIBC_STACKPROTECTOR

tools/include/nolibc/arch-loongarch.h

+1 −1
Original line number Diff line number Diff line
@@ -172,7 +172,7 @@ const unsigned long *_auxv __attribute__((weak)); 
#endif



/* startup code */

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void)

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)

{

	__asm__ volatile (

#ifdef _NOLIBC_STACKPROTECTOR

tools/include/nolibc/arch-mips.h

+1 −1
Original line number Diff line number Diff line
@@ -182,7 +182,7 @@ char **environ __attribute__((weak)); 
const unsigned long *_auxv __attribute__((weak));



/* startup code, note that it's called __start on MIPS */

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) __start(void)

void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector __start(void)

{

	__asm__ volatile (

		/*".set nomips16\n"*/