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x86-64: Add CFI annotations to lib/rwsem_64.S

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Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Alexander van Heukelum <heukelum@fastmail.fm>
LKML-Reference: <4D6BCDFF02000078000341B0@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jan Beulich 2011-02-28 15:31:59 +00:00 committed by Ingo Molnar
parent 7bf04be8f4
commit 39f2205e1a
1 changed files with 34 additions and 22 deletions
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56
arch/x86/lib/rwsem_64.S
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@ -23,43 +23,50 @@
#include <asm/dwarf2.h>
#define save_common_regs \
pushq %rdi; \
pushq %rsi; \
pushq %rcx; \
pushq %r8; \
pushq %r9; \
pushq %r10; \
pushq %r11
pushq_cfi %rdi; CFI_REL_OFFSET rdi, 0; \
pushq_cfi %rsi; CFI_REL_OFFSET rsi, 0; \
pushq_cfi %rcx; CFI_REL_OFFSET rcx, 0; \
pushq_cfi %r8; CFI_REL_OFFSET r8, 0; \
pushq_cfi %r9; CFI_REL_OFFSET r9, 0; \
pushq_cfi %r10; CFI_REL_OFFSET r10, 0; \
pushq_cfi %r11; CFI_REL_OFFSET r11, 0
#define restore_common_regs \
popq %r11; \
popq %r10; \
popq %r9; \
popq %r8; \
popq %rcx; \
popq %rsi; \
popq %rdi
popq_cfi %r11; CFI_RESTORE r11; \
popq_cfi %r10; CFI_RESTORE r10; \
popq_cfi %r9; CFI_RESTORE r9; \
popq_cfi %r8; CFI_RESTORE r8; \
popq_cfi %rcx; CFI_RESTORE rcx; \
popq_cfi %rsi; CFI_RESTORE rsi; \
popq_cfi %rdi; CFI_RESTORE rdi
/* Fix up special calling conventions */
ENTRY(call_rwsem_down_read_failed)
CFI_STARTPROC
save_common_regs
pushq %rdx
pushq_cfi %rdx
CFI_REL_OFFSET rdx, 0
movq %rax,%rdi
call rwsem_down_read_failed
popq %rdx
popq_cfi %rdx
CFI_RESTORE rdx
restore_common_regs
ret
ENDPROC(call_rwsem_down_read_failed)
CFI_ENDPROC
ENDPROC(call_rwsem_down_read_failed)
ENTRY(call_rwsem_down_write_failed)
CFI_STARTPROC
save_common_regs
movq %rax,%rdi
call rwsem_down_write_failed
restore_common_regs
ret
ENDPROC(call_rwsem_down_write_failed)
CFI_ENDPROC
ENDPROC(call_rwsem_down_write_failed)
ENTRY(call_rwsem_wake)
CFI_STARTPROC
decl %edx /* do nothing if still outstanding active readers */
jnz 1f
save_common_regs
@ -67,15 +74,20 @@ ENTRY(call_rwsem_wake)
call rwsem_wake
restore_common_regs
1: ret
ENDPROC(call_rwsem_wake)
CFI_ENDPROC
ENDPROC(call_rwsem_wake)
/* Fix up special calling conventions */
ENTRY(call_rwsem_downgrade_wake)
CFI_STARTPROC
save_common_regs
pushq %rdx
pushq_cfi %rdx
CFI_REL_OFFSET rdx, 0
movq %rax,%rdi
call rwsem_downgrade_wake
popq %rdx
popq_cfi %rdx
CFI_RESTORE rdx
restore_common_regs
ret
ENDPROC(call_rwsem_downgrade_wake)
CFI_ENDPROC
ENDPROC(call_rwsem_downgrade_wake)