[PATCH] x86-64: Annotate interrupt frame backlink in interrupt handlers

Add correct CFI annotation to the backlink on top of the interrupt stack.

Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
index ab9b2c4..38a7b2d 100644 (file)
--- a/arch/x86_64/kernel/entry.S
+++ b/arch/x86_64/kernel/entry.S
@@ -535,6 +535,8 @@ END(stub_rt_sigreturn)
 1:     incl    %gs:pda_irqcount
        cmoveq %gs:pda_irqstackptr,%rsp
        push    %rbp                    # backlink for old unwinder
+       CFI_ADJUST_CFA_OFFSET 8
+       CFI_REL_OFFSET rbp,0
        /*
         * We entered an interrupt context - irqs are off:
         */
@@ -1174,6 +1176,7 @@ ENTRY(call_softirq)
        incl %gs:pda_irqcount
        cmove %gs:pda_irqstackptr,%rsp
        push  %rbp                      # backlink for old unwinder
+       CFI_ADJUST_CFA_OFFSET    8
        call __do_softirq
        leaveq
        CFI_DEF_CFA_REGISTER    rsp