The patch titled
x86_64: unwinder fix
has been removed from the -mm tree. Its filename is
x86_64-unwinder-fix.patch
This patch was dropped because it is obsolete
------------------------------------------------------
Subject: x86_64: unwinder fix
From: "Jan Beulich" <jbeulich@xxxxxxxxxx>
Put back the backlink stack pointer for show_trace() to properly switch
from the interrupt stack, and adjust call_softirq to have proper unwind
information.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/x86_64/kernel/entry.S | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff -puN arch/x86_64/kernel/entry.S~x86_64-unwinder-fix arch/x86_64/kernel/entry.S
--- a/arch/x86_64/kernel/entry.S~x86_64-unwinder-fix
+++ a/arch/x86_64/kernel/entry.S
@@ -521,6 +521,7 @@ END(stub_rt_sigreturn)
swapgs
1: incl %gs:pda_irqcount # RED-PEN should check preempt count
cmoveq %gs:pda_irqstackptr,%rsp
+ pushq %rdi # for show_trace()
/*
* We entered an interrupt context - irqs are off:
*/
@@ -1147,16 +1148,18 @@ END(machine_check)
ENTRY(call_softirq)
CFI_STARTPROC
- movq %gs:pda_irqstackptr,%rax
- movq %rsp,%rdx
- CFI_DEF_CFA_REGISTER rdx
+ pushq %rbp
+ CFI_ADJUST_CFA_OFFSET 8
+ CFI_REL_OFFSET rbp, 0
+ movq %rsp,%rbp
+ CFI_DEF_CFA_REGISTER rbp
incl %gs:pda_irqcount
- cmove %rax,%rsp
- pushq %rdx
- /*todo CFI_DEF_CFA_EXPRESSION ...*/
+ cmoveq %gs:pda_irqstackptr,%rsp
+ pushq %rbp # for show_trace()
call __do_softirq
- popq %rsp
+ leaveq
CFI_DEF_CFA_REGISTER rsp
+ CFI_ADJUST_CFA_OFFSET -8
decl %gs:pda_irqcount
ret
CFI_ENDPROC
_
Patches currently in -mm which might be from jbeulich@xxxxxxxxxx are
origin.patch
x86_64-unwinder-fix.patch
i386-initialize-end-of-memory-variables-as-early-as.patch
-
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