[PATCH 4/9] sandbox: setjmp: mark C version as __weak

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

In a later commit, we will start allowing overriding
setjmp/longjmp/initjmp by arch-specific implementations.

Prepare this by marking the existing implementation __weak.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 arch/sandbox/os/setjmp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/sandbox/os/setjmp.c b/arch/sandbox/os/setjmp.c
index 7f686b0fc6e9..cbf1182ed591 100644
--- a/arch/sandbox/os/setjmp.c
+++ b/arch/sandbox/os/setjmp.c
@@ -78,7 +78,7 @@ static void coroutine_trampoline(int signal)
 	coroutine_bootstrap(tr_state.entry);
 }
 
-int initjmp(_jmp_buf jmp, void (*func)(void), void *stack_top)
+int __attribute__((weak)) initjmp(_jmp_buf jmp, void (*func)(void), void *stack_top)
 {
 	struct sigaction sa;
 	struct sigaction osa;
@@ -169,12 +169,12 @@ int initjmp(_jmp_buf jmp, void (*func)(void), void *stack_top)
 	return 0;
 }
 
-int  __attribute__((returns_twice)) barebox_setjmp(_jmp_buf jmp)
+int __attribute__((weak,returns_twice)) barebox_setjmp(_jmp_buf jmp)
 {
 	return sigsetjmp(jmp, 0);
 }
 
-void __attribute((noreturn)) barebox_longjmp(_jmp_buf jmp, int ret)
+void __attribute__((weak,noreturn)) barebox_longjmp(_jmp_buf jmp, int ret)
 {
 	siglongjmp(jmp, ret);
 }
-- 
2.39.5