Commit cb5dd2c5 authored by Andy Lutomirski's avatar Andy Lutomirski Committed by H. Peter Anvin
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x86_64, entry: Merge most 64-bit asm entry macros 



I haven't touched the device interrupt code, which is different
enough that it's probably not worth merging, and I haven't done
anything about paranoidzeroentry_ist yet.

This appears to produce an entry_64.o file that differs only in the
debug info line numbers.

Signed-off-by: default avatarAndy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/e7a6acfb130471700370e77af9e4b4b6ed46f5ef.1400709717.git.luto@amacapital.net


Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent 1bd24efc

arch/x86/kernel/entry_64.S

+64 −88
Original line number Diff line number Diff line
@@ -36,7 +36,7 @@ 
 * - FIXUP_TOP_OF_STACK/RESTORE_TOP_OF_STACK - Fix up the hardware stack

 * frame that is otherwise undefined after a SYSCALL

 * - TRACE_IRQ_* - Trace hard interrupt state for lock debugging.

 * - errorentry/paranoidentry/zeroentry - Define exception entry points.

 * - idtentry - Define exception entry points.

 */



#include <linux/linkage.h>
@@ -1203,39 +1203,53 @@ apicinterrupt IRQ_WORK_VECTOR \ 
/*

 * Exception entry points.

 */

.macro zeroentry sym do_sym

.macro idtentry sym do_sym has_error_code:req paranoid=0

ENTRY(\sym)

	.if \has_error_code

	XCPT_FRAME

	.else

	INTR_FRAME

	ASM_CLAC

	PARAVIRT_ADJUST_EXCEPTION_FRAME

	pushq_cfi $-1		/* ORIG_RAX: no syscall to restart */

	subq $ORIG_RAX-R15, %rsp

	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15

	call error_entry

	DEFAULT_FRAME 0

	movq %rsp,%rdi		/* pt_regs pointer */

	xorl %esi,%esi		/* no error code */

	call \do_sym

	jmp error_exit		/* %ebx: no swapgs flag */

	CFI_ENDPROC

END(\sym)

.endm

	.endif



.macro paranoidzeroentry sym do_sym

ENTRY(\sym)

	INTR_FRAME

	ASM_CLAC

	PARAVIRT_ADJUST_EXCEPTION_FRAME



	.ifeq \has_error_code

	pushq_cfi $-1			/* ORIG_RAX: no syscall to restart */

	.endif



	subq $ORIG_RAX-R15, %rsp

	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15



	.if \paranoid

	call save_paranoid

	.else

	call error_entry

	.endif



	DEFAULT_FRAME 0



	.if \paranoid

	TRACE_IRQS_OFF

	.endif



	movq %rsp,%rdi			/* pt_regs pointer */



	.if \has_error_code

	movq ORIG_RAX(%rsp),%rsi	/* get error code */

	movq $-1,ORIG_RAX(%rsp)		/* no syscall to restart */

	.else

	xorl %esi,%esi			/* no error code */

	.endif



	call \do_sym



	.if \paranoid

	jmp paranoid_exit		/* %ebx: no swapgs flag */

	.else

	jmp error_exit			/* %ebx: no swapgs flag */

	.endif



	CFI_ENDPROC

END(\sym)

.endm
@@ -1262,68 +1276,30 @@ ENTRY(\sym) 
END(\sym)

.endm



.macro errorentry sym do_sym

ENTRY(\sym)

	XCPT_FRAME

	ASM_CLAC

	PARAVIRT_ADJUST_EXCEPTION_FRAME

	subq $ORIG_RAX-R15, %rsp

	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15

	call error_entry

	DEFAULT_FRAME 0

	movq %rsp,%rdi			/* pt_regs pointer */

	movq ORIG_RAX(%rsp),%rsi	/* get error code */

	movq $-1,ORIG_RAX(%rsp)		/* no syscall to restart */

	call \do_sym

	jmp error_exit			/* %ebx: no swapgs flag */

	CFI_ENDPROC

END(\sym)

.endm



#ifdef CONFIG_TRACING

.macro trace_errorentry sym do_sym

errorentry trace(\sym) trace(\do_sym)

errorentry \sym \do_sym

.macro trace_idtentry sym do_sym has_error_code:req

idtentry trace(\sym) trace(\do_sym) has_error_code=\has_error_code

idtentry \sym \do_sym has_error_code=\has_error_code

.endm

#else

.macro trace_errorentry sym do_sym

errorentry \sym \do_sym

.macro trace_idtentry sym do_sym has_error_code:req

idtentry \sym \do_sym has_error_code=\has_error_code

.endm

#endif



	/* error code is on the stack already */

.macro paranoiderrorentry sym do_sym

ENTRY(\sym)

	XCPT_FRAME

	ASM_CLAC

	PARAVIRT_ADJUST_EXCEPTION_FRAME

	subq $ORIG_RAX-R15, %rsp

	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15

	call save_paranoid

	DEFAULT_FRAME 0

	TRACE_IRQS_OFF

	movq %rsp,%rdi			/* pt_regs pointer */

	movq ORIG_RAX(%rsp),%rsi	/* get error code */

	movq $-1,ORIG_RAX(%rsp)		/* no syscall to restart */

	call \do_sym

	jmp paranoid_exit		/* %ebx: no swapgs flag */

	CFI_ENDPROC

END(\sym)

.endm



zeroentry divide_error do_divide_error

zeroentry overflow do_overflow

zeroentry bounds do_bounds

zeroentry invalid_op do_invalid_op

zeroentry device_not_available do_device_not_available

paranoiderrorentry double_fault do_double_fault

zeroentry coprocessor_segment_overrun do_coprocessor_segment_overrun

errorentry invalid_TSS do_invalid_TSS

errorentry segment_not_present do_segment_not_present

zeroentry spurious_interrupt_bug do_spurious_interrupt_bug

zeroentry coprocessor_error do_coprocessor_error

errorentry alignment_check do_alignment_check

zeroentry simd_coprocessor_error do_simd_coprocessor_error

idtentry divide_error do_divide_error has_error_code=0

idtentry overflow do_overflow has_error_code=0

idtentry bounds do_bounds has_error_code=0

idtentry invalid_op do_invalid_op has_error_code=0

idtentry device_not_available do_device_not_available has_error_code=0

idtentry double_fault do_double_fault has_error_code=1 paranoid=1

idtentry coprocessor_segment_overrun do_coprocessor_segment_overrun has_error_code=0

idtentry invalid_TSS do_invalid_TSS has_error_code=1

idtentry segment_not_present do_segment_not_present has_error_code=1

idtentry spurious_interrupt_bug do_spurious_interrupt_bug has_error_code=0

idtentry coprocessor_error do_coprocessor_error has_error_code=0

idtentry alignment_check do_alignment_check has_error_code=1

idtentry simd_coprocessor_error do_simd_coprocessor_error has_error_code=0





	/* Reload gs selector with exception handling */
@@ -1373,7 +1349,7 @@ ENTRY(do_softirq_own_stack) 
END(do_softirq_own_stack)



#ifdef CONFIG_XEN

zeroentry xen_hypervisor_callback xen_do_hypervisor_callback

idtentry xen_hypervisor_callback xen_do_hypervisor_callback has_error_code=0



/*

 * A note on the "critical region" in our callback handler.
@@ -1486,19 +1462,19 @@ apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \ 


paranoidzeroentry_ist debug do_debug DEBUG_STACK

paranoidzeroentry_ist int3 do_int3 DEBUG_STACK

paranoiderrorentry stack_segment do_stack_segment

idtentry stack_segment do_stack_segment has_error_code=1 paranoid=1

#ifdef CONFIG_XEN

zeroentry xen_debug do_debug

zeroentry xen_int3 do_int3

errorentry xen_stack_segment do_stack_segment

idtentry xen_debug do_debug has_error_code=0

idtentry xen_int3 do_int3 has_error_code=0

idtentry xen_stack_segment do_stack_segment has_error_code=1

#endif

errorentry general_protection do_general_protection

trace_errorentry page_fault do_page_fault

idtentry general_protection do_general_protection has_error_code=1

trace_idtentry page_fault do_page_fault has_error_code=1

#ifdef CONFIG_KVM_GUEST

errorentry async_page_fault do_async_page_fault

idtentry async_page_fault do_async_page_fault has_error_code=1

#endif

#ifdef CONFIG_X86_MCE

paranoidzeroentry machine_check *machine_check_vector(%rip)

idtentry machine_check has_error_code=0 paranoid=1 do_sym=*machine_check_vector(%rip)

#endif



	/*

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