On 09/25/2007 07:38 PM, William Cattey wrote:
>
> I'd feel a lot more confident we were on the right track if I could just
> correctly patch Fitzhardinge's cleanup into the test setup I have now.
>
I think you need to zero both registers if you're using 2.6.16, and force
%eax as the source so it doesn't choose %ebp?
--- a/arch/i386/kernel/vm86.c
+++ b/arch/i386/kernel/vm86.c
@@ -306,19 +334,19 @@ static void do_sys_vm86(struct kernel_vm86_struct *info,
struct task_struct *tsk
tsk->thread.screen_bitmap = info->screen_bitmap;
if (info->flags & VM86_SCREEN_BITMAP)
mark_screen_rdonly(tsk->mm);
- __asm__ __volatile__("xorl %eax,%eax; movl %eax,%fs; movl
%eax,%gs\n\t");
- __asm__ __volatile__("movl %%eax, %0\n" :"=r"(eax));
/*call audit_syscall_exit since we do not exit via the normal paths */
if (unlikely(current->audit_context))
- audit_syscall_exit(AUDITSC_RESULT(eax), eax);
+ audit_syscall_exit(AUDITSC_RESULT(0), 0);
__asm__ __volatile__(
"movl %0,%%esp\n\t"
"movl %1,%%ebp\n\t"
+ "mov %2, %%fs\n\t"
+ "mov %2, %%gs\n\t"
"jmp resume_userspace"
: /* no outputs */
- :"r" (&info->regs), "r" (task_thread_info(tsk)));
+ :"r" (&info->regs), "r" (task_thread_info(tsk)), "a" (0));
/* we never return here */
}
-
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