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-rw-r--r--arch/i386/kernel/stack_trace.s31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/i386/kernel/stack_trace.s b/arch/i386/kernel/stack_trace.s
new file mode 100644
index 0000000..fbd77ed
--- /dev/null
+++ b/arch/i386/kernel/stack_trace.s
@@ -0,0 +1,31 @@
+.section .text
+
+.global walk_stack
+.type walk_stack, @function
+walk_stack:
+ pushl %ebp
+ movl %esp, %ebp
+
+ pushl %edi
+ movl -4(%ebp), %edi
+ pushl %ebx
+ movl -8(%ebp), %ebx
+
+ xorl %eax, %eax
+ movl 8(%esp), %ebx
+ movl 16(%esp), %edi
+ movl 20(%esp), %ecx
+walk:
+ testl %ebx, %ebx
+ jz done
+ movl 4(%ebx), %edx
+ movl 0(%ebx), %ebx
+ movl %edx, (%edi)
+ addl $4, %edi
+ inc %eax
+ loop walk
+done:
+ popl %ebx
+ popl %edi
+ popl %ebp
+ ret