From: "Andi Kleen" <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
25-akpm/arch/x86_64/kernel/head.S | 8 ++++++++
1 files changed, 8 insertions(+)
diff -puN arch/x86_64/kernel/head.S~x86_64-dump-stack-and-prevent-recursion-on-early-fault arch/x86_64/kernel/head.S
--- 25/arch/x86_64/kernel/head.S~x86_64-dump-stack-and-prevent-recursion-on-early-fault 2005-04-12 03:21:22.009790904 -0700
+++ 25-akpm/arch/x86_64/kernel/head.S 2005-04-12 03:21:22.012790448 -0700
@@ -200,14 +200,22 @@ init_rsp:
.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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