hi,
In IA32 application function parameter is passed on stack but not register,
on grub_setjmp funciton, env is pushed on stack, but not eax register.Caller is
responsible to push parameter on the stack and after function call pop the
stack.
Here is the patch for setjmp.S in IA32 EFI, any suggestion is welcome.
Thanks
bibo,mao
--- grub-1.94.org/normal/i386/setjmp.S 2004-04-04 21:46:03.000000000 +0800
+++ grub-1.94/normal/i386/setjmp.S 2006-08-03 11:00:02.000000000 +0800
@@ -27,11 +27,13 @@
* int grub_setjmp (grub_jmp_buf env)
*/
FUNCTION(grub_setjmp)
+ popl %ecx
+ popl %eax
+ pushl %eax
movl %ebx, 0(%eax) /* EBX */
movl %esi, 4(%eax) /* ESI */
movl %edi, 8(%eax) /* EDI */
movl %ebp, 12(%eax) /* EBP */
- popl %ecx
movl %esp, 16(%eax) /* ESP */
movl %ecx, 20(%eax) /* EIP */
xorl %eax, %eax
@@ -42,6 +44,11 @@ FUNCTION(grub_setjmp)
* int grub_longjmp (grub_jmp_buf env, int val)
*/
FUNCTION(grub_longjmp)
+ popl %eax /* skip return address */
+ popl %edx
+ popl %eax
+ pushl %eax
+ pushl %edx
movl 0(%eax), %ebx
movl 4(%eax), %esi
movl 8(%eax), %edi
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
