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-rw-r--r--arch/i386/kernel/entry.S29
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S
index cfc683f153b..e802f3cac7e 100644
--- a/arch/i386/kernel/entry.S
+++ b/arch/i386/kernel/entry.S
@@ -663,6 +663,35 @@ ENTRY(spurious_interrupt_bug)
pushl $do_spurious_interrupt_bug
jmp error_code
+#ifdef CONFIG_STACK_UNWIND
+ENTRY(arch_unwind_init_running)
+ movl 4(%esp), %edx
+ movl (%esp), %ecx
+ leal 4(%esp), %eax
+ movl %ebx, EBX(%edx)
+ xorl %ebx, %ebx
+ movl %ebx, ECX(%edx)
+ movl %ebx, EDX(%edx)
+ movl %esi, ESI(%edx)
+ movl %edi, EDI(%edx)
+ movl %ebp, EBP(%edx)
+ movl %ebx, EAX(%edx)
+ movl $__USER_DS, DS(%edx)
+ movl $__USER_DS, ES(%edx)
+ movl %ebx, ORIG_EAX(%edx)
+ movl %ecx, EIP(%edx)
+ movl 12(%esp), %ecx
+ movl $__KERNEL_CS, CS(%edx)
+ movl %ebx, EFLAGS(%edx)
+ movl %eax, OLDESP(%edx)
+ movl 8(%esp), %eax
+ movl %ecx, 8(%esp)
+ movl EBX(%edx), %ebx
+ movl $__KERNEL_DS, OLDSS(%edx)
+ jmpl *%eax
+ENDPROC(arch_unwind_init_running)
+#endif
+
.section .rodata,"a"
#include "syscall_table.S"