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x86/asm/head*.S: Change global labels to local 

Make the disassembly look less confusing:

  -- head_64.o.before.asm
  ++ head_64.o.after.asm
   0000000000000120 <early_idt_handler>:
    120:	fc                   	cld
    121:	83 3c 24 02          	cmpl   $0x2,(%rsp)
  - 125:	0f 84 9d 00 00 00    	je     1c8 <is_nmi>
  + 125:	0f 84 9d 00 00 00    	je     1c8 <early_idt_handler+0xa8>
    12b:	83 3d 00 00 00 00 02 	cmpl   $0x2,0x0(%rip)        # 132 <early_idt_handler+0x12>
    132:	74 7e                	je     1b2 <early_idt_handler+0x92>
    134:	ff 05 00 00 00 00    	incl   0x0(%rip)        # 13a <early_idt_handler+0x1a>
  @@ -1198,9 +1198,7 @@ Disassembly of section .init.text:
    1bf:	5a                   	pop    %rdx
    1c0:	59                   	pop    %rcx
    1c1:	58                   	pop    %rax
  - 1c2:	ff 0d 00 00 00 00    	decl   0x0(%rip)        # 1c8 <is_nmi>
  -
  -00000000000001c8 <is_nmi>:
  + 1c2:	ff 0d 00 00 00 00    	decl   0x0(%rip)        # 1c8 <early_idt_handler+0xa8>
    1c8:	48 83 c4 10          	add    $0x10,%rsp
    1cc:	48 cf                	iretq

  -- head_32.o.before.asm
  ++ head_32.o.after.asm
   0000016c <early_idt_handler>:
    16c:  fc                      cld
    16d:  83 3c 24 02             cmpl   $0x2,(%esp)
  - 171:  74 73                   je     1e6 <is_nmi>
  + 171:  74 73                   je     1e6 <ex_entry+0xc>
    173:  36 83 3d 00 00 00 00    cmpl   $0x2,%ss:0x0
    17a:  02
    17b:  74 5a                   je     1d7 <hlt_loop>
  @@ -483,8 +483,6 @@ Disassembly of section .init.text:
    1dd:  59                      pop    %ecx
    1de:  58                      pop    %eax
    1df:  36 ff 0d 00 00 00 00    decl   %ss:0x0
  -
  -000001e6 <is_nmi>:
    1e6:  83 c4 08                add    $0x8,%esp
    1e9:  cf                      iret
    1ea:  66 90                   xchg   %ax,%ax

No functionality change.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1431793079-11153-1-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov 2015-05-16 18:17:59 +02:00 committed by Ingo Molnar
parent 75d95d8488
commit e839004b49
2 changed files with 4 additions and 4 deletions
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4
arch/x86/kernel/head_32.S
View File

@ -547,7 +547,7 @@ ENTRY(early_idt_handler)
cld cld
cmpl $2,(%esp) # X86_TRAP_NMI cmpl $2,(%esp) # X86_TRAP_NMI
je is_nmi # Ignore NMI je .Lis_nmi # Ignore NMI
cmpl $2,%ss:early_recursion_flag cmpl $2,%ss:early_recursion_flag
je hlt_loop je hlt_loop
@ -600,7 +600,7 @@ ex_entry:
pop %ecx pop %ecx
pop %eax pop %eax
decl %ss:early_recursion_flag decl %ss:early_recursion_flag
is_nmi: .Lis_nmi:
addl $8,%esp /* drop vector number and error code */ addl $8,%esp /* drop vector number and error code */
iret iret
ENDPROC(early_idt_handler) ENDPROC(early_idt_handler)

4
arch/x86/kernel/head_64.S
View File

@ -344,7 +344,7 @@ ENTRY(early_idt_handler)
cld cld
cmpl $2,(%rsp) # X86_TRAP_NMI cmpl $2,(%rsp) # X86_TRAP_NMI
je is_nmi # Ignore NMI je .Lis_nmi # Ignore NMI
cmpl $2,early_recursion_flag(%rip) cmpl $2,early_recursion_flag(%rip)
jz 1f jz 1f
@ -409,7 +409,7 @@ ENTRY(early_idt_handler)
popq %rcx popq %rcx
popq %rax popq %rax
decl early_recursion_flag(%rip) decl early_recursion_flag(%rip)
is_nmi: .Lis_nmi:
addq $16,%rsp # drop vector number and error code addq $16,%rsp # drop vector number and error code
INTERRUPT_RETURN INTERRUPT_RETURN
ENDPROC(early_idt_handler) ENDPROC(early_idt_handler)