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| author | Jan Beulich <jbeulich@novell.com> | 2006-06-26 13:57:35 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 10:48:17 -0700 |
| commit | 1de9c3f67ec6fddfb85325bab551f4094f55f410 (patch) | |
| tree | c3d469e9ea995a12e4ae299b27c9e747d3eaa3ac /arch/x86_64/kernel/entry.S | |
| parent | b538ed278b80641ee6d7b75497d5e14de1bb1137 (diff) | |
| download | blackbird-op-linux-1de9c3f67ec6fddfb85325bab551f4094f55f410.tar.gz blackbird-op-linux-1de9c3f67ec6fddfb85325bab551f4094f55f410.zip | |
[PATCH] x86_64: reliable stack trace support (x86-64 IRQ stack
Change the switching to/from the IRQ stack so that unwind annotations can
be added for it without requiring CFA expressions.
AK: I cleaned it up a bit, making it unconditional and removing the
obsolete DEBUG_INFO full frame code.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/entry.S')
| -rw-r--r-- | arch/x86_64/kernel/entry.S | 33 |
1 files changed, 8 insertions, 25 deletions
diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S index 6c68beec51b3..4f407ef6b865 100644 --- a/arch/x86_64/kernel/entry.S +++ b/arch/x86_64/kernel/entry.S @@ -473,29 +473,18 @@ END(stub_rt_sigreturn) /* 0(%rsp): interrupt number */ .macro interrupt func cld -#ifdef CONFIG_DEBUG_INFO - SAVE_ALL - movq %rsp,%rdi - /* - * Setup a stack frame pointer. This allows gdb to trace - * back to the original stack. - */ - movq %rsp,%rbp - CFI_DEF_CFA_REGISTER rbp -#else SAVE_ARGS leaq -ARGOFFSET(%rsp),%rdi # arg1 for handler -#endif + pushq %rbp + CFI_ADJUST_CFA_OFFSET 8 + CFI_REL_OFFSET rbp, 0 + movq %rsp,%rbp + CFI_DEF_CFA_REGISTER rbp testl $3,CS(%rdi) je 1f swapgs 1: incl %gs:pda_irqcount # RED-PEN should check preempt count - movq %gs:pda_irqstackptr,%rax - cmoveq %rax,%rsp /*todo This needs CFI annotation! */ - pushq %rdi # save old stack -#ifndef CONFIG_DEBUG_INFO - CFI_ADJUST_CFA_OFFSET 8 -#endif + cmoveq %gs:pda_irqstackptr,%rsp call \func .endm @@ -504,17 +493,11 @@ ENTRY(common_interrupt) interrupt do_IRQ /* 0(%rsp): oldrsp-ARGOFFSET */ ret_from_intr: - popq %rdi -#ifndef CONFIG_DEBUG_INFO - CFI_ADJUST_CFA_OFFSET -8 -#endif cli decl %gs:pda_irqcount -#ifdef CONFIG_DEBUG_INFO - movq RBP(%rdi),%rbp + leaveq CFI_DEF_CFA_REGISTER rsp -#endif - leaq ARGOFFSET(%rdi),%rsp /*todo This needs CFI annotation! */ + CFI_ADJUST_CFA_OFFSET -8 exit_intr: GET_THREAD_INFO(%rcx) testl $3,CS-ARGOFFSET(%rsp) |
