2 * linux/arch/i386/entry.S
4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * entry.S contains the system-call and fault low-level handling routines.
9 * This also contains the timer-interrupt handler, as well as all interrupts
10 * and faults that can result in a task-switch.
12 * NOTE: This code handles signal-recognition, which happens every time
13 * after a timer-interrupt and after each system call.
15 * I changed all the .align's to 4 (16 byte alignment), as that's faster
18 * Stack layout in 'ret_from_system_call':
19 * ptrace needs to have all regs on the stack.
20 * if the order here is changed, it needs to be
21 * updated in fork.c:copy_process, signal.c:do_signal,
22 * ptrace.c and ptrace.h
41 * "current" is in register %ebx during any slow entries.
44 #include <linux/linkage.h>
45 #include <asm/thread_info.h>
46 #include <asm/irqflags.h>
47 #include <asm/errno.h>
48 #include <asm/segment.h>
52 #include <asm/percpu.h>
53 #include <asm/dwarf2.h>
54 #include "irq_vectors.h"
57 * We use macros for low-level operations which need to be overridden
58 * for paravirtualization. The following will never clobber any registers:
59 * INTERRUPT_RETURN (aka. "iret")
60 * GET_CR0_INTO_EAX (aka. "movl %cr0, %eax")
61 * ENABLE_INTERRUPTS_SYSEXIT (aka "sti; sysexit").
63 * For DISABLE_INTERRUPTS/ENABLE_INTERRUPTS (aka "cli"/"sti"), you must
64 * specify what registers can be overwritten (CLBR_NONE, CLBR_EAX/EDX/ECX/ANY).
65 * Allowing a register to be clobbered can shrink the paravirt replacement
66 * enough to patch inline, increasing performance.
69 #define nr_syscalls ((syscall_table_size)/4)
79 #define preempt_stop(clobbers) DISABLE_INTERRUPTS(clobbers); TRACE_IRQS_OFF
81 #define preempt_stop(clobbers)
82 #define resume_kernel restore_nocheck
85 .macro TRACE_IRQS_IRET
86 #ifdef CONFIG_TRACE_IRQFLAGS
87 testl $IF_MASK,PT_EFLAGS(%esp) # interrupts off?
95 #define resume_userspace_sig check_userspace
97 #define resume_userspace_sig resume_userspace
103 CFI_ADJUST_CFA_OFFSET 4;\
104 /*CFI_REL_OFFSET fs, 0;*/\
106 CFI_ADJUST_CFA_OFFSET 4;\
107 /*CFI_REL_OFFSET es, 0;*/\
109 CFI_ADJUST_CFA_OFFSET 4;\
110 /*CFI_REL_OFFSET ds, 0;*/\
112 CFI_ADJUST_CFA_OFFSET 4;\
113 CFI_REL_OFFSET eax, 0;\
115 CFI_ADJUST_CFA_OFFSET 4;\
116 CFI_REL_OFFSET ebp, 0;\
118 CFI_ADJUST_CFA_OFFSET 4;\
119 CFI_REL_OFFSET edi, 0;\
121 CFI_ADJUST_CFA_OFFSET 4;\
122 CFI_REL_OFFSET esi, 0;\
124 CFI_ADJUST_CFA_OFFSET 4;\
125 CFI_REL_OFFSET edx, 0;\
127 CFI_ADJUST_CFA_OFFSET 4;\
128 CFI_REL_OFFSET ecx, 0;\
130 CFI_ADJUST_CFA_OFFSET 4;\
131 CFI_REL_OFFSET ebx, 0;\
132 movl $(__USER_DS), %edx; \
135 movl $(__KERNEL_PDA), %edx; \
138 #define RESTORE_INT_REGS \
140 CFI_ADJUST_CFA_OFFSET -4;\
143 CFI_ADJUST_CFA_OFFSET -4;\
146 CFI_ADJUST_CFA_OFFSET -4;\
149 CFI_ADJUST_CFA_OFFSET -4;\
152 CFI_ADJUST_CFA_OFFSET -4;\
155 CFI_ADJUST_CFA_OFFSET -4;\
158 CFI_ADJUST_CFA_OFFSET -4;\
161 #define RESTORE_REGS \
164 CFI_ADJUST_CFA_OFFSET -4;\
167 CFI_ADJUST_CFA_OFFSET -4;\
170 CFI_ADJUST_CFA_OFFSET -4;\
172 .pushsection .fixup,"ax"; \
179 .section __ex_table,"a";\
186 #define RING0_INT_FRAME \
187 CFI_STARTPROC simple;\
189 CFI_DEF_CFA esp, 3*4;\
190 /*CFI_OFFSET cs, -2*4;*/\
193 #define RING0_EC_FRAME \
194 CFI_STARTPROC simple;\
196 CFI_DEF_CFA esp, 4*4;\
197 /*CFI_OFFSET cs, -2*4;*/\
200 #define RING0_PTREGS_FRAME \
201 CFI_STARTPROC simple;\
203 CFI_DEF_CFA esp, PT_OLDESP-PT_EBX;\
204 /*CFI_OFFSET cs, PT_CS-PT_OLDESP;*/\
205 CFI_OFFSET eip, PT_EIP-PT_OLDESP;\
206 /*CFI_OFFSET es, PT_ES-PT_OLDESP;*/\
207 /*CFI_OFFSET ds, PT_DS-PT_OLDESP;*/\
208 CFI_OFFSET eax, PT_EAX-PT_OLDESP;\
209 CFI_OFFSET ebp, PT_EBP-PT_OLDESP;\
210 CFI_OFFSET edi, PT_EDI-PT_OLDESP;\
211 CFI_OFFSET esi, PT_ESI-PT_OLDESP;\
212 CFI_OFFSET edx, PT_EDX-PT_OLDESP;\
213 CFI_OFFSET ecx, PT_ECX-PT_OLDESP;\
214 CFI_OFFSET ebx, PT_EBX-PT_OLDESP
219 CFI_ADJUST_CFA_OFFSET 4
221 GET_THREAD_INFO(%ebp)
223 CFI_ADJUST_CFA_OFFSET -4
224 pushl $0x0202 # Reset kernel eflags
225 CFI_ADJUST_CFA_OFFSET 4
227 CFI_ADJUST_CFA_OFFSET -4
233 * Return to user mode is not as complex as all this looks,
234 * but we want the default path for a system call return to
235 * go as quickly as possible which is why some of this is
236 * less clear than it otherwise should be.
239 # userspace resumption stub bypassing syscall exit tracing
243 preempt_stop(CLBR_ANY)
245 GET_THREAD_INFO(%ebp)
247 movl PT_EFLAGS(%esp), %eax # mix EFLAGS and CS
248 movb PT_CS(%esp), %al
249 andl $(VM_MASK | SEGMENT_RPL_MASK), %eax
251 jb resume_kernel # not returning to v8086 or userspace
253 ENTRY(resume_userspace)
254 DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
255 # setting need_resched or sigpending
256 # between sampling and the iret
257 movl TI_flags(%ebp), %ecx
258 andl $_TIF_WORK_MASK, %ecx # is there any work to be done on
259 # int/exception return?
262 END(ret_from_exception)
264 #ifdef CONFIG_PREEMPT
266 DISABLE_INTERRUPTS(CLBR_ANY)
267 cmpl $0,TI_preempt_count(%ebp) # non-zero preempt_count ?
270 movl TI_flags(%ebp), %ecx # need_resched set ?
271 testb $_TIF_NEED_RESCHED, %cl
273 testl $IF_MASK,PT_EFLAGS(%esp) # interrupts off (exception path) ?
275 call preempt_schedule_irq
281 /* SYSENTER_RETURN points to after the "sysenter" instruction in
282 the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */
284 # sysenter call handler stub
285 ENTRY(sysenter_entry)
289 CFI_REGISTER esp, ebp
290 movl TSS_sysenter_esp0(%esp),%esp
293 * No need to follow this irqs on/off section: the syscall
294 * disabled irqs and here we enable it straight after entry:
296 ENABLE_INTERRUPTS(CLBR_NONE)
298 CFI_ADJUST_CFA_OFFSET 4
299 /*CFI_REL_OFFSET ss, 0*/
301 CFI_ADJUST_CFA_OFFSET 4
302 CFI_REL_OFFSET esp, 0
304 CFI_ADJUST_CFA_OFFSET 4
306 CFI_ADJUST_CFA_OFFSET 4
307 /*CFI_REL_OFFSET cs, 0*/
308 #ifndef CONFIG_COMPAT_VDSO
310 * Push current_thread_info()->sysenter_return to the stack.
311 * A tiny bit of offset fixup is necessary - 4*4 means the 4 words
312 * pushed above; +8 corresponds to copy_thread's esp0 setting.
314 pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp)
316 pushl $SYSENTER_RETURN
318 CFI_ADJUST_CFA_OFFSET 4
319 CFI_REL_OFFSET eip, 0
322 * Load the potential sixth argument from user stack.
323 * Careful about security.
325 cmpl $__PAGE_OFFSET-3,%ebp
328 .section __ex_table,"a"
330 .long 1b,syscall_fault
334 CFI_ADJUST_CFA_OFFSET 4
336 GET_THREAD_INFO(%ebp)
338 /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
339 testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
340 jnz syscall_trace_entry
341 cmpl $(nr_syscalls), %eax
343 call *sys_call_table(,%eax,4)
344 movl %eax,PT_EAX(%esp)
345 DISABLE_INTERRUPTS(CLBR_ECX|CLBR_EDX)
347 movl TI_flags(%ebp), %ecx
348 testw $_TIF_ALLWORK_MASK, %cx
349 jne syscall_exit_work
350 /* if something modifies registers it must also disable sysexit */
351 movl PT_EIP(%esp), %edx
352 movl PT_OLDESP(%esp), %ecx
355 1: mov PT_FS(%esp), %fs
356 ENABLE_INTERRUPTS_SYSEXIT
358 .pushsection .fixup,"ax"
359 2: movl $0,PT_FS(%esp)
361 .section __ex_table,"a"
365 ENDPROC(sysenter_entry)
367 # system call handler stub
369 RING0_INT_FRAME # can't unwind into user space anyway
370 pushl %eax # save orig_eax
371 CFI_ADJUST_CFA_OFFSET 4
373 GET_THREAD_INFO(%ebp)
374 testl $TF_MASK,PT_EFLAGS(%esp)
376 orl $_TIF_SINGLESTEP,TI_flags(%ebp)
378 # system call tracing in operation / emulation
379 /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
380 testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
381 jnz syscall_trace_entry
382 cmpl $(nr_syscalls), %eax
385 call *sys_call_table(,%eax,4)
386 movl %eax,PT_EAX(%esp) # store the return value
388 DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
389 # setting need_resched or sigpending
390 # between sampling and the iret
392 movl TI_flags(%ebp), %ecx
393 testw $_TIF_ALLWORK_MASK, %cx # current->work
394 jne syscall_exit_work
397 movl PT_EFLAGS(%esp), %eax # mix EFLAGS, SS and CS
398 # Warning: PT_OLDSS(%esp) contains the wrong/random values if we
399 # are returning to the kernel.
400 # See comments in process.c:copy_thread() for details.
401 movb PT_OLDSS(%esp), %ah
402 movb PT_CS(%esp), %al
403 andl $(VM_MASK | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax
404 cmpl $((SEGMENT_LDT << 8) | USER_RPL), %eax
406 je ldt_ss # returning to user-space with LDT SS
409 restore_nocheck_notrace:
411 addl $4, %esp # skip orig_eax/error_code
412 CFI_ADJUST_CFA_OFFSET -4
417 ENABLE_INTERRUPTS(CLBR_NONE)
418 pushl $0 # no error code
422 .section __ex_table,"a"
429 larl PT_OLDSS(%esp), %eax
431 testl $0x00400000, %eax # returning to 32bit stack?
432 jnz restore_nocheck # allright, normal return
434 #ifdef CONFIG_PARAVIRT
436 * The kernel can't run on a non-flat stack if paravirt mode
437 * is active. Rather than try to fixup the high bits of
438 * ESP, bypass this code entirely. This may break DOSemu
439 * and/or Wine support in a paravirt VM, although the option
440 * is still available to implement the setting of the high
441 * 16-bits in the INTERRUPT_RETURN paravirt-op.
443 cmpl $0, paravirt_ops+PARAVIRT_enabled
447 /* If returning to userspace with 16bit stack,
448 * try to fix the higher word of ESP, as the CPU
450 * This is an "official" bug of all the x86-compatible
451 * CPUs, which we can try to work around to make
452 * dosemu and wine happy. */
453 movl PT_OLDESP(%esp), %eax
455 call patch_espfix_desc
457 CFI_ADJUST_CFA_OFFSET 4
459 CFI_ADJUST_CFA_OFFSET 4
460 DISABLE_INTERRUPTS(CLBR_EAX)
463 CFI_ADJUST_CFA_OFFSET -8
468 # perform work that needs to be done immediately before resumption
470 RING0_PTREGS_FRAME # can't unwind into user space anyway
472 testb $_TIF_NEED_RESCHED, %cl
476 DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
477 # setting need_resched or sigpending
478 # between sampling and the iret
480 movl TI_flags(%ebp), %ecx
481 andl $_TIF_WORK_MASK, %ecx # is there any work to be done other
482 # than syscall tracing?
484 testb $_TIF_NEED_RESCHED, %cl
487 work_notifysig: # deal with pending signals and
488 # notify-resume requests
490 testl $VM_MASK, PT_EFLAGS(%esp)
492 jne work_notifysig_v86 # returning to kernel-space or
495 call do_notify_resume
496 jmp resume_userspace_sig
500 pushl %ecx # save ti_flags for do_notify_resume
501 CFI_ADJUST_CFA_OFFSET 4
502 call save_v86_state # %eax contains pt_regs pointer
504 CFI_ADJUST_CFA_OFFSET -4
510 call do_notify_resume
511 jmp resume_userspace_sig
514 # perform syscall exit tracing
517 movl $-ENOSYS,PT_EAX(%esp)
520 call do_syscall_trace
522 jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU,
523 # so must skip actual syscall
524 movl PT_ORIG_EAX(%esp), %eax
525 cmpl $(nr_syscalls), %eax
528 END(syscall_trace_entry)
530 # perform syscall exit tracing
533 testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl
536 ENABLE_INTERRUPTS(CLBR_ANY) # could let do_syscall_trace() call
540 call do_syscall_trace
542 END(syscall_exit_work)
545 RING0_INT_FRAME # can't unwind into user space anyway
547 pushl %eax # save orig_eax
548 CFI_ADJUST_CFA_OFFSET 4
550 GET_THREAD_INFO(%ebp)
551 movl $-EFAULT,PT_EAX(%esp)
556 movl $-ENOSYS,PT_EAX(%esp)
561 #define FIXUP_ESPFIX_STACK \
562 /* since we are on a wrong stack, we cant make it a C code :( */ \
563 movl %fs:PDA_cpu, %ebx; \
564 PER_CPU(cpu_gdt, %ebx); \
565 GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah); \
567 pushl $__KERNEL_DS; \
568 CFI_ADJUST_CFA_OFFSET 4; \
570 CFI_ADJUST_CFA_OFFSET 4; \
572 CFI_ADJUST_CFA_OFFSET -8;
573 #define UNWIND_ESPFIX_STACK \
575 /* see if on espfix stack */ \
576 cmpw $__ESPFIX_SS, %ax; \
578 movl $__KERNEL_DS, %eax; \
581 /* switch to normal stack */ \
582 FIXUP_ESPFIX_STACK; \
586 * Build the entry stubs and pointer table with
587 * some assembler magic.
593 ENTRY(irq_entries_start)
599 CFI_ADJUST_CFA_OFFSET -4
602 CFI_ADJUST_CFA_OFFSET 4
609 END(irq_entries_start)
616 * the CPU automatically disables interrupts when executing an IRQ vector,
617 * so IRQ-flags tracing has to follow that:
626 ENDPROC(common_interrupt)
629 #define BUILD_INTERRUPT(name, nr) \
633 CFI_ADJUST_CFA_OFFSET 4; \
642 /* The include is where all of the SMP etc. interrupts come from */
643 #include "entry_arch.h"
645 /* This alternate entry is needed because we hijack the apic LVTT */
646 #if defined(CONFIG_VMI) && defined(CONFIG_X86_LOCAL_APIC)
647 BUILD_INTERRUPT(apic_vmi_timer_interrupt,LOCAL_TIMER_VECTOR)
650 KPROBE_ENTRY(page_fault)
653 CFI_ADJUST_CFA_OFFSET 4
656 /* the function address is in %fs's slot on the stack */
658 CFI_ADJUST_CFA_OFFSET 4
659 /*CFI_REL_OFFSET es, 0*/
661 CFI_ADJUST_CFA_OFFSET 4
662 /*CFI_REL_OFFSET ds, 0*/
664 CFI_ADJUST_CFA_OFFSET 4
665 CFI_REL_OFFSET eax, 0
667 CFI_ADJUST_CFA_OFFSET 4
668 CFI_REL_OFFSET ebp, 0
670 CFI_ADJUST_CFA_OFFSET 4
671 CFI_REL_OFFSET edi, 0
673 CFI_ADJUST_CFA_OFFSET 4
674 CFI_REL_OFFSET esi, 0
676 CFI_ADJUST_CFA_OFFSET 4
677 CFI_REL_OFFSET edx, 0
679 CFI_ADJUST_CFA_OFFSET 4
680 CFI_REL_OFFSET ecx, 0
682 CFI_ADJUST_CFA_OFFSET 4
683 CFI_REL_OFFSET ebx, 0
686 CFI_ADJUST_CFA_OFFSET 4
687 /*CFI_REL_OFFSET fs, 0*/
688 movl $(__KERNEL_PDA), %ecx
692 CFI_ADJUST_CFA_OFFSET -4
693 /*CFI_REGISTER es, ecx*/
694 movl PT_FS(%esp), %edi # get the function address
695 movl PT_ORIG_EAX(%esp), %edx # get the error code
696 movl $-1, PT_ORIG_EAX(%esp) # no syscall to restart
697 mov %ecx, PT_FS(%esp)
698 /*CFI_REL_OFFSET fs, ES*/
699 movl $(__USER_DS), %ecx
702 movl %esp,%eax # pt_regs pointer
704 jmp ret_from_exception
706 KPROBE_END(page_fault)
708 ENTRY(coprocessor_error)
711 CFI_ADJUST_CFA_OFFSET 4
712 pushl $do_coprocessor_error
713 CFI_ADJUST_CFA_OFFSET 4
716 END(coprocessor_error)
718 ENTRY(simd_coprocessor_error)
721 CFI_ADJUST_CFA_OFFSET 4
722 pushl $do_simd_coprocessor_error
723 CFI_ADJUST_CFA_OFFSET 4
726 END(simd_coprocessor_error)
728 ENTRY(device_not_available)
730 pushl $-1 # mark this as an int
731 CFI_ADJUST_CFA_OFFSET 4
734 testl $0x4, %eax # EM (math emulation bit)
735 jne device_not_available_emulate
736 preempt_stop(CLBR_ANY)
737 call math_state_restore
738 jmp ret_from_exception
739 device_not_available_emulate:
740 pushl $0 # temporary storage for ORIG_EIP
741 CFI_ADJUST_CFA_OFFSET 4
744 CFI_ADJUST_CFA_OFFSET -4
745 jmp ret_from_exception
747 END(device_not_available)
750 * Debug traps and NMI can happen at the one SYSENTER instruction
751 * that sets up the real kernel stack. Check here, since we can't
752 * allow the wrong stack to be used.
754 * "TSS_sysenter_esp0+12" is because the NMI/debug handler will have
755 * already pushed 3 words if it hits on the sysenter instruction:
756 * eflags, cs and eip.
758 * We just load the right stack, and push the three (known) values
759 * by hand onto the new stack - while updating the return eip past
760 * the instruction that would have done it for sysenter.
762 #define FIX_STACK(offset, ok, label) \
763 cmpw $__KERNEL_CS,4(%esp); \
766 movl TSS_sysenter_esp0+offset(%esp),%esp; \
767 CFI_DEF_CFA esp, 0; \
770 CFI_ADJUST_CFA_OFFSET 4; \
771 pushl $__KERNEL_CS; \
772 CFI_ADJUST_CFA_OFFSET 4; \
773 pushl $sysenter_past_esp; \
774 CFI_ADJUST_CFA_OFFSET 4; \
775 CFI_REL_OFFSET eip, 0
779 cmpl $sysenter_entry,(%esp)
780 jne debug_stack_correct
781 FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn)
783 pushl $-1 # mark this as an int
784 CFI_ADJUST_CFA_OFFSET 4
786 xorl %edx,%edx # error code 0
787 movl %esp,%eax # pt_regs pointer
789 jmp ret_from_exception
794 * NMI is doubly nasty. It can happen _while_ we're handling
795 * a debug fault, and the debug fault hasn't yet been able to
796 * clear up the stack. So we first check whether we got an
797 * NMI on the sysenter entry path, but after that we need to
798 * check whether we got an NMI on the debug path where the debug
799 * fault happened on the sysenter path.
804 CFI_ADJUST_CFA_OFFSET 4
806 cmpw $__ESPFIX_SS, %ax
808 CFI_ADJUST_CFA_OFFSET -4
810 cmpl $sysenter_entry,(%esp)
813 CFI_ADJUST_CFA_OFFSET 4
815 /* Do not access memory above the end of our stack page,
816 * it might not exist.
818 andl $(THREAD_SIZE-1),%eax
819 cmpl $(THREAD_SIZE-20),%eax
821 CFI_ADJUST_CFA_OFFSET -4
822 jae nmi_stack_correct
823 cmpl $sysenter_entry,12(%esp)
824 je nmi_debug_stack_check
826 /* We have a RING0_INT_FRAME here */
828 CFI_ADJUST_CFA_OFFSET 4
830 xorl %edx,%edx # zero error code
831 movl %esp,%eax # pt_regs pointer
833 jmp restore_nocheck_notrace
838 FIX_STACK(12,nmi_stack_correct, 1)
839 jmp nmi_stack_correct
841 nmi_debug_stack_check:
842 /* We have a RING0_INT_FRAME here */
843 cmpw $__KERNEL_CS,16(%esp)
844 jne nmi_stack_correct
847 cmpl $debug_esp_fix_insn,(%esp)
849 FIX_STACK(24,nmi_stack_correct, 1)
850 jmp nmi_stack_correct
853 /* We have a RING0_INT_FRAME here.
855 * create the pointer to lss back
858 CFI_ADJUST_CFA_OFFSET 4
860 CFI_ADJUST_CFA_OFFSET 4
862 /* copy the iret frame of 12 bytes */
865 CFI_ADJUST_CFA_OFFSET 4
868 CFI_ADJUST_CFA_OFFSET 4
870 FIXUP_ESPFIX_STACK # %eax == %esp
871 xorl %edx,%edx # zero error code
874 lss 12+4(%esp), %esp # back to espfix stack
875 CFI_ADJUST_CFA_OFFSET -24
878 .section __ex_table,"a"
884 #ifdef CONFIG_PARAVIRT
887 .section __ex_table,"a"
893 ENTRY(native_irq_enable_sysexit)
896 END(native_irq_enable_sysexit)
901 pushl $-1 # mark this as an int
902 CFI_ADJUST_CFA_OFFSET 4
904 xorl %edx,%edx # zero error code
905 movl %esp,%eax # pt_regs pointer
907 jmp ret_from_exception
914 CFI_ADJUST_CFA_OFFSET 4
916 CFI_ADJUST_CFA_OFFSET 4
924 CFI_ADJUST_CFA_OFFSET 4
926 CFI_ADJUST_CFA_OFFSET 4
934 CFI_ADJUST_CFA_OFFSET 4
936 CFI_ADJUST_CFA_OFFSET 4
941 ENTRY(coprocessor_segment_overrun)
944 CFI_ADJUST_CFA_OFFSET 4
945 pushl $do_coprocessor_segment_overrun
946 CFI_ADJUST_CFA_OFFSET 4
949 END(coprocessor_segment_overrun)
953 pushl $do_invalid_TSS
954 CFI_ADJUST_CFA_OFFSET 4
959 ENTRY(segment_not_present)
961 pushl $do_segment_not_present
962 CFI_ADJUST_CFA_OFFSET 4
965 END(segment_not_present)
969 pushl $do_stack_segment
970 CFI_ADJUST_CFA_OFFSET 4
975 KPROBE_ENTRY(general_protection)
977 pushl $do_general_protection
978 CFI_ADJUST_CFA_OFFSET 4
981 KPROBE_END(general_protection)
983 ENTRY(alignment_check)
985 pushl $do_alignment_check
986 CFI_ADJUST_CFA_OFFSET 4
993 pushl $0 # no error code
994 CFI_ADJUST_CFA_OFFSET 4
995 pushl $do_divide_error
996 CFI_ADJUST_CFA_OFFSET 4
1001 #ifdef CONFIG_X86_MCE
1002 ENTRY(machine_check)
1005 CFI_ADJUST_CFA_OFFSET 4
1006 pushl machine_check_vector
1007 CFI_ADJUST_CFA_OFFSET 4
1013 ENTRY(spurious_interrupt_bug)
1016 CFI_ADJUST_CFA_OFFSET 4
1017 pushl $do_spurious_interrupt_bug
1018 CFI_ADJUST_CFA_OFFSET 4
1021 END(spurious_interrupt_bug)
1023 ENTRY(kernel_thread_helper)
1024 pushl $0 # fake return address for unwinder
1028 CFI_ADJUST_CFA_OFFSET 4
1031 CFI_ADJUST_CFA_OFFSET 4
1034 ENDPROC(kernel_thread_helper)
1036 .section .rodata,"a"
1037 #include "syscall_table.S"
1039 syscall_table_size=(.-sys_call_table)