x86: fix longjmp() implementation
If longjmp(jmp_buf env, int val) is called with val = 0, the setjmp()
macro must return 1.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/i386/setjmp.S b/arch/x86/cpu/i386/setjmp.S
index 40b10dc..eceeafa 100644
--- a/arch/x86/cpu/i386/setjmp.S
+++ b/arch/x86/cpu/i386/setjmp.S
@@ -49,12 +49,17 @@
xchgl %eax, %edx
#else
movl 4(%esp), %edx /* jmp_ptr address */
+ movl 8(%esp), %eax /* Return value */
#endif
movl (%edx), %ebx
movl 4(%edx), %esp
movl 8(%edx), %ebp
movl 12(%edx), %esi
movl 16(%edx), %edi
+ test %eax, %eax
+ jnz nz
+ inc %eax
+nz:
jmp *20(%edx)
.size longjmp, .-longjmp