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Commit 60cf637a authored by Jan Beulich's avatar Jan Beulich Committed by Ingo Molnar
Browse files

x86: Use {push,pop}_cfi in more places 



Cleaning up and shortening code...

Signed-off-by: default avatarJan Beulich <jbeulich@novell.com>
Cc: Alexander van Heukelum <heukelum@fastmail.fm>
LKML-Reference: <4D6BD35002000078000341DA@vpn.id2.novell.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 39f2205e

arch/x86/ia32/ia32entry.S

+9 −18
Original line number Diff line number Diff line
@@ -126,26 +126,20 @@ ENTRY(ia32_sysenter_target) 
	 */

	ENABLE_INTERRUPTS(CLBR_NONE)

 	movl	%ebp,%ebp		/* zero extension */

	pushq	$__USER32_DS

	CFI_ADJUST_CFA_OFFSET 8

	pushq_cfi $__USER32_DS

	/*CFI_REL_OFFSET ss,0*/

	pushq	%rbp

	CFI_ADJUST_CFA_OFFSET 8

	pushq_cfi %rbp

	CFI_REL_OFFSET rsp,0

	pushfq

	CFI_ADJUST_CFA_OFFSET 8

	pushfq_cfi

	/*CFI_REL_OFFSET rflags,0*/

	movl	8*3-THREAD_SIZE+TI_sysenter_return(%rsp), %r10d

	CFI_REGISTER rip,r10

	pushq	$__USER32_CS

	CFI_ADJUST_CFA_OFFSET 8

	pushq_cfi $__USER32_CS

	/*CFI_REL_OFFSET cs,0*/

	movl	%eax, %eax

	pushq	%r10

	CFI_ADJUST_CFA_OFFSET 8

	pushq_cfi %r10

	CFI_REL_OFFSET rip,0

	pushq	%rax

	CFI_ADJUST_CFA_OFFSET 8

	pushq_cfi %rax

	cld

	SAVE_ARGS 0,0,1

 	/* no need to do an access_ok check here because rbp has been
@@ -182,11 +176,9 @@ sysexit_from_sys_call: 
	xorq	%r9,%r9

	xorq	%r10,%r10

	xorq	%r11,%r11

	popfq

	CFI_ADJUST_CFA_OFFSET -8

	popfq_cfi

	/*CFI_RESTORE rflags*/

	popq	%rcx				/* User %esp */

	CFI_ADJUST_CFA_OFFSET -8

	popq_cfi %rcx				/* User %esp */

	CFI_REGISTER rsp,rcx

	TRACE_IRQS_ON

	ENABLE_INTERRUPTS_SYSEXIT32
@@ -421,8 +413,7 @@ ENTRY(ia32_syscall) 
	 */

	ENABLE_INTERRUPTS(CLBR_NONE)

	movl %eax,%eax

	pushq %rax

	CFI_ADJUST_CFA_OFFSET 8

	pushq_cfi %rax

	cld

	/* note the registers are not zero extended to the sf.

	   this could be a problem. */

arch/x86/include/asm/frame.h

+2 −4
Original line number Diff line number Diff line
@@ -7,14 +7,12 @@ 
   frame pointer later */

#ifdef CONFIG_FRAME_POINTER

	.macro FRAME

	pushl %ebp

	CFI_ADJUST_CFA_OFFSET 4

	pushl_cfi %ebp

	CFI_REL_OFFSET ebp,0

	movl %esp,%ebp

	.endm

	.macro ENDFRAME

	popl %ebp

	CFI_ADJUST_CFA_OFFSET -4

	popl_cfi %ebp

	CFI_RESTORE ebp

	.endm

#else

arch/x86/kernel/entry_32.S

+1 −2
Original line number Diff line number Diff line
@@ -1409,8 +1409,7 @@ END(general_protection) 
#ifdef CONFIG_KVM_GUEST

ENTRY(async_page_fault)

	RING0_EC_FRAME

	pushl $do_async_page_fault

	CFI_ADJUST_CFA_OFFSET 4

	pushl_cfi $do_async_page_fault

	jmp error_code

	CFI_ENDPROC

END(apf_page_fault)

arch/x86/lib/atomic64_386_32.S

+2 −4
Original line number Diff line number Diff line
@@ -15,14 +15,12 @@ 


/* if you want SMP support, implement these with real spinlocks */

.macro LOCK reg

	pushfl

	CFI_ADJUST_CFA_OFFSET 4

	pushfl_cfi

	cli

.endm



.macro UNLOCK reg

	popfl

	CFI_ADJUST_CFA_OFFSET -4

	popfl_cfi

.endm



#define BEGIN(op) \

arch/x86/lib/atomic64_cx8_32.S

+2 −4
Original line number Diff line number Diff line
@@ -14,14 +14,12 @@ 
#include <asm/dwarf2.h>



.macro SAVE reg

	pushl %\reg

	CFI_ADJUST_CFA_OFFSET 4

	pushl_cfi %\reg

	CFI_REL_OFFSET \reg, 0

.endm



.macro RESTORE reg

	popl %\reg

	CFI_ADJUST_CFA_OFFSET -4

	popl_cfi %\reg

	CFI_RESTORE \reg

.endm