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Diffstat (limited to 'sysdeps/i386/setjmp.S')
-rw-r--r--sysdeps/i386/setjmp.S29
1 files changed, 21 insertions, 8 deletions
diff --git a/sysdeps/i386/setjmp.S b/sysdeps/i386/setjmp.S
index a07d6f1137..ccb7147606 100644
--- a/sysdeps/i386/setjmp.S
+++ b/sysdeps/i386/setjmp.S
@@ -24,13 +24,26 @@ Cambridge, MA 02139, USA. */
ENTRY (__sigsetjmp)
movl 4(%esp), %eax /* User's jmp_buf in %eax. */
/* Save registers. */
- movl %ebx, JB_BX(%eax)
- movl %esi, JB_SI(%eax)
- movl %edi, JB_DI(%eax)
- movl %ebp, JB_BP(%eax)
+ movl %ebx, (JB_BX*4)(%eax)
+ movl %esi, (JB_SI*4)(%eax)
+ movl %edi, (JB_DI*4)(%eax)
+ movl %ebp, (JB_BP*4)(%eax)
leal 4(%esp), %ecx /* Save SP as it will be after we return. */
- movl %ecx, JB_SP(%eax)
+ movl %ecx, (JB_SP*4)(%eax)
movl 0(%esp), %ecx /* Save PC we are returning to now. */
- movl %ecx, JB_PC(%eax)
- xorl %eax, %eax /* Return zero. */
- ret
+ movl %ecx, (JB_PC*4)(%eax)
+
+ /* Make a tail call to __sigjmp_save; it takes the same args. */
+#ifdef PIC
+ /* We cannot use the PLT, because it requires that %ebx be set, but
+ we can't save and restore our caller's value. Instead, we do an
+ indirect jump through the GOT, using for the temporary register
+ %ecx, which is call-clobbered. */
+ call here
+here: popl %ecx
+ addl $_GLOBAL_OFFSET_TABLE_+[.-here], %ecx
+ movl C_SYMBOL_NAME(__sigjmp_save@GOT)(%ecx), %ecx
+ jmp *%ecx
+#else
+ jmp __sigjmp_save
+#endif