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author | Alexander van Heukelum <heukelum@mailshack.com> | 2008-11-21 15:44:28 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-11-21 18:02:56 (GMT) |
commit | b8b1d08bf6fe7c09e6cb2294bc0e5e964b361241 (patch) | |
tree | ac7b5eb8d0ddd7e2b1a8c5dcc34683c070e33470 /arch/x86/kernel/entry_64.S | |
parent | e2f6bc25b98dbb10d809ee50262b43fcae67840a (diff) | |
download | linux-fsl-qoriq-b8b1d08bf6fe7c09e6cb2294bc0e5e964b361241.tar.xz |
x86: entry_64.S: split out some macro's and move common code to paranoid_exit
Impact: cleanup
DISABLE_INTERRUPTS(CLBR_NONE)/TRACE_IRQS_OFF is now always
executed just before paranoid_exit. Move it there.
Split out paranoidzeroentry, paranoiderrorentry, and
paranoidzeroentry_ist to get more readable macro's.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/entry_64.S')
-rw-r--r-- | arch/x86/kernel/entry_64.S | 102 |
1 files changed, 51 insertions, 51 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index fad777b..692c1da 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -1026,6 +1026,39 @@ END(spurious_interrupt) CFI_ENDPROC .endm + .macro paranoidzeroentry sym + INTR_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME + pushq $-1 /* ORIG_RAX: no syscall to restart */ + CFI_ADJUST_CFA_OFFSET 8 + subq $15*8, %rsp + call save_paranoid + TRACE_IRQS_OFF + movq %rsp,%rdi /* pt_regs pointer */ + xorl %esi,%esi /* no error code */ + call \sym + jmp paranoid_exit /* %ebx: no swapgs flag */ + CFI_ENDPROC + .endm + + .macro paranoidzeroentry_ist sym ist + INTR_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME + pushq $-1 /* ORIG_RAX: no syscall to restart */ + CFI_ADJUST_CFA_OFFSET 8 + subq $15*8, %rsp + call save_paranoid + TRACE_IRQS_OFF + movq %rsp,%rdi /* pt_regs pointer */ + xorl %esi,%esi /* no error code */ + movq %gs:pda_data_offset, %rbp + subq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp) + call \sym + addq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp) + jmp paranoid_exit /* %ebx: no swapgs flag */ + CFI_ENDPROC + .endm + .macro errorentry sym XCPT_FRAME PARAVIRT_ADJUST_EXCEPTION_FRAME @@ -1042,27 +1075,20 @@ END(spurious_interrupt) .endm /* error code is on the stack already */ - .macro paranoidentry sym ist=0 - subq $15*8, %rsp + .macro paranoiderrorentry sym + XCPT_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME + subq $15*8,%rsp CFI_ADJUST_CFA_OFFSET 15*8 call save_paranoid DEFAULT_FRAME 0 - .if \ist - movq %gs:pda_data_offset, %rbp - .endif TRACE_IRQS_OFF - movq %rsp,%rdi - movq ORIG_RAX(%rsp),%rsi - movq $-1,ORIG_RAX(%rsp) - .if \ist - subq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp) - .endif + movq %rsp,%rdi /* pt_regs pointer */ + movq ORIG_RAX(%rsp),%rsi /* get error code */ + movq $-1,ORIG_RAX(%rsp) /* no syscall to restart */ call \sym - .if \ist - addq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp) - .endif - DISABLE_INTERRUPTS(CLBR_NONE) - TRACE_IRQS_OFF + jmp paranoid_exit /* %ebx: no swapgs flag */ + CFI_ENDPROC .endm /* @@ -1081,6 +1107,8 @@ END(spurious_interrupt) /* ebx: no swapgs flag */ KPROBE_ENTRY(paranoid_exit) INTR_FRAME + DISABLE_INTERRUPTS(CLBR_NONE) + TRACE_IRQS_OFF testl %ebx,%ebx /* swapgs needed? */ jnz paranoid_restore testl $3,CS(%rsp) @@ -1331,13 +1359,7 @@ END(device_not_available) /* runs on exception stack */ KPROBE_ENTRY(debug) - INTR_FRAME - PARAVIRT_ADJUST_EXCEPTION_FRAME - pushq $0 - CFI_ADJUST_CFA_OFFSET 8 - paranoidentry do_debug, DEBUG_STACK - jmp paranoid_exit - CFI_ENDPROC + paranoidzeroentry_ist do_debug, DEBUG_STACK KPROBE_END(debug) /* runs on exception stack */ @@ -1351,14 +1373,12 @@ KPROBE_ENTRY(nmi) DEFAULT_FRAME 0 /* paranoidentry do_nmi, 0; without TRACE_IRQS_OFF */ movq %rsp,%rdi - movq ORIG_RAX(%rsp),%rsi - movq $-1,ORIG_RAX(%rsp) + movq $-1,%rsi call do_nmi - DISABLE_INTERRUPTS(CLBR_NONE) #ifdef CONFIG_TRACE_IRQFLAGS /* paranoidexit; without TRACE_IRQS_OFF */ /* ebx: no swapgs flag */ -nmi_exit: + DISABLE_INTERRUPTS(CLBR_NONE) testl %ebx,%ebx /* swapgs needed? */ jnz nmi_restore testl $3,CS(%rsp) @@ -1398,13 +1418,7 @@ nmi_schedule: KPROBE_END(nmi) KPROBE_ENTRY(int3) - INTR_FRAME - PARAVIRT_ADJUST_EXCEPTION_FRAME - pushq $0 - CFI_ADJUST_CFA_OFFSET 8 - paranoidentry do_int3, DEBUG_STACK - jmp paranoid_exit - CFI_ENDPROC + paranoidzeroentry_ist do_int3, DEBUG_STACK KPROBE_END(int3) ENTRY(overflow) @@ -1425,11 +1439,7 @@ END(coprocessor_segment_overrun) /* runs on exception stack */ ENTRY(double_fault) - XCPT_FRAME - PARAVIRT_ADJUST_EXCEPTION_FRAME - paranoidentry do_double_fault - jmp paranoid_exit - CFI_ENDPROC + paranoiderrorentry do_double_fault END(double_fault) ENTRY(invalid_TSS) @@ -1442,11 +1452,7 @@ END(segment_not_present) /* runs on exception stack */ ENTRY(stack_segment) - XCPT_FRAME - PARAVIRT_ADJUST_EXCEPTION_FRAME - paranoidentry do_stack_segment - jmp paranoid_exit - CFI_ENDPROC + paranoiderrorentry do_stack_segment END(stack_segment) KPROBE_ENTRY(general_protection) @@ -1468,13 +1474,7 @@ END(spurious_interrupt_bug) #ifdef CONFIG_X86_MCE /* runs on exception stack */ ENTRY(machine_check) - INTR_FRAME - PARAVIRT_ADJUST_EXCEPTION_FRAME - pushq $0 - CFI_ADJUST_CFA_OFFSET 8 - paranoidentry do_machine_check - jmp paranoid_exit - CFI_ENDPROC + paranoidzeroentry do_machine_check END(machine_check) #endif |