tree 495fa8e9c1ddaba3c354ed6064114b75ffe95c86
parent 02b5ff1bbf278c7e5121916bb11470939e0ece72
author Andi Kleen <[EMAIL PROTECTED]> Tue Apr 12 08:25:31 2005
committer Linus Torvalds <[EMAIL PROTECTED]> Tue Apr 12 08:25:31 2005
[PATCH] x86_64: Dump stack and prevent recursion on early fault
Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
head.S | 8 ++++++++
1 files changed, 8 insertions(+)
Index: arch/x86_64/kernel/head.S
===================================================================
--- 7a0a0711242531e3b8f1b3a8d01af54645c5387f/arch/x86_64/kernel/head.S
(mode:100644 sha1:56a3946974e5333d216913e549d03052768a4e9b)
+++ 495fa8e9c1ddaba3c354ed6064114b75ffe95c86/arch/x86_64/kernel/head.S
(mode:100644 sha1:077738e66556842258456894f9f009dfaa662711)
@@ -200,14 +200,22 @@
.quad init_thread_union+THREAD_SIZE-8
ENTRY(early_idt_handler)
+ cmpl $2,early_recursion_flag(%rip)
+ jz 1f
+ incl early_recursion_flag(%rip)
xorl %eax,%eax
movq 8(%rsp),%rsi # get rip
movq (%rsp),%rdx
movq %cr2,%rcx
leaq early_idt_msg(%rip),%rdi
call early_printk
+ cmpl $2,early_recursion_flag(%rip)
+ jz 1f
+ call dump_stack
1: hlt
jmp 1b
+early_recursion_flag:
+ .long 0
early_idt_msg:
.asciz "PANIC: early exception rip %lx error %lx cr2 %lx\n"
-
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