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Commit 7d0b0e8d authored by Andi Kleen's avatar Andi Kleen Committed by Andi Kleen
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[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: default avatarAndi Kleen <ak@suse.de>
parent 0a5ace2a

arch/x86_64/kernel/entry.S

+3 −0
Original line number Diff line number Diff line
@@ -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