forked from Minki/linux
64ca9004b8
This adds an option to remove vm86 support under CONFIG_EMBEDDED. Saves about 5k. This version eliminates most of the #ifdefs of the previous version and instead uses function stubs in vm86.h. Also, release_vm86_irqs is moved from asm-i386/irq.h to a more appropriate home in vm86.h so that the stubs can live together. $ size vmlinux-baseline vmlinux-novm86 text data bss dec hex filename 2920821 523232 190652 3634705 377611 vmlinux-baseline 2916268 523100 190492 3629860 376324 vmlinux-novm86 Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
666 lines
15 KiB
ArmAsm
666 lines
15 KiB
ArmAsm
/*
|
|
* linux/arch/i386/entry.S
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
*/
|
|
|
|
/*
|
|
* entry.S contains the system-call and fault low-level handling routines.
|
|
* This also contains the timer-interrupt handler, as well as all interrupts
|
|
* and faults that can result in a task-switch.
|
|
*
|
|
* NOTE: This code handles signal-recognition, which happens every time
|
|
* after a timer-interrupt and after each system call.
|
|
*
|
|
* I changed all the .align's to 4 (16 byte alignment), as that's faster
|
|
* on a 486.
|
|
*
|
|
* Stack layout in 'ret_from_system_call':
|
|
* ptrace needs to have all regs on the stack.
|
|
* if the order here is changed, it needs to be
|
|
* updated in fork.c:copy_process, signal.c:do_signal,
|
|
* ptrace.c and ptrace.h
|
|
*
|
|
* 0(%esp) - %ebx
|
|
* 4(%esp) - %ecx
|
|
* 8(%esp) - %edx
|
|
* C(%esp) - %esi
|
|
* 10(%esp) - %edi
|
|
* 14(%esp) - %ebp
|
|
* 18(%esp) - %eax
|
|
* 1C(%esp) - %ds
|
|
* 20(%esp) - %es
|
|
* 24(%esp) - orig_eax
|
|
* 28(%esp) - %eip
|
|
* 2C(%esp) - %cs
|
|
* 30(%esp) - %eflags
|
|
* 34(%esp) - %oldesp
|
|
* 38(%esp) - %oldss
|
|
*
|
|
* "current" is in register %ebx during any slow entries.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/errno.h>
|
|
#include <asm/segment.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/page.h>
|
|
#include <asm/desc.h>
|
|
#include "irq_vectors.h"
|
|
|
|
#define nr_syscalls ((syscall_table_size)/4)
|
|
|
|
EBX = 0x00
|
|
ECX = 0x04
|
|
EDX = 0x08
|
|
ESI = 0x0C
|
|
EDI = 0x10
|
|
EBP = 0x14
|
|
EAX = 0x18
|
|
DS = 0x1C
|
|
ES = 0x20
|
|
ORIG_EAX = 0x24
|
|
EIP = 0x28
|
|
CS = 0x2C
|
|
EFLAGS = 0x30
|
|
OLDESP = 0x34
|
|
OLDSS = 0x38
|
|
|
|
CF_MASK = 0x00000001
|
|
TF_MASK = 0x00000100
|
|
IF_MASK = 0x00000200
|
|
DF_MASK = 0x00000400
|
|
NT_MASK = 0x00004000
|
|
VM_MASK = 0x00020000
|
|
|
|
#ifdef CONFIG_PREEMPT
|
|
#define preempt_stop cli
|
|
#else
|
|
#define preempt_stop
|
|
#define resume_kernel restore_nocheck
|
|
#endif
|
|
|
|
#define SAVE_ALL \
|
|
cld; \
|
|
pushl %es; \
|
|
pushl %ds; \
|
|
pushl %eax; \
|
|
pushl %ebp; \
|
|
pushl %edi; \
|
|
pushl %esi; \
|
|
pushl %edx; \
|
|
pushl %ecx; \
|
|
pushl %ebx; \
|
|
movl $(__USER_DS), %edx; \
|
|
movl %edx, %ds; \
|
|
movl %edx, %es;
|
|
|
|
#define RESTORE_INT_REGS \
|
|
popl %ebx; \
|
|
popl %ecx; \
|
|
popl %edx; \
|
|
popl %esi; \
|
|
popl %edi; \
|
|
popl %ebp; \
|
|
popl %eax
|
|
|
|
#define RESTORE_REGS \
|
|
RESTORE_INT_REGS; \
|
|
1: popl %ds; \
|
|
2: popl %es; \
|
|
.section .fixup,"ax"; \
|
|
3: movl $0,(%esp); \
|
|
jmp 1b; \
|
|
4: movl $0,(%esp); \
|
|
jmp 2b; \
|
|
.previous; \
|
|
.section __ex_table,"a";\
|
|
.align 4; \
|
|
.long 1b,3b; \
|
|
.long 2b,4b; \
|
|
.previous
|
|
|
|
|
|
ENTRY(ret_from_fork)
|
|
pushl %eax
|
|
call schedule_tail
|
|
GET_THREAD_INFO(%ebp)
|
|
popl %eax
|
|
jmp syscall_exit
|
|
|
|
/*
|
|
* Return to user mode is not as complex as all this looks,
|
|
* but we want the default path for a system call return to
|
|
* go as quickly as possible which is why some of this is
|
|
* less clear than it otherwise should be.
|
|
*/
|
|
|
|
# userspace resumption stub bypassing syscall exit tracing
|
|
ALIGN
|
|
ret_from_exception:
|
|
preempt_stop
|
|
ret_from_intr:
|
|
GET_THREAD_INFO(%ebp)
|
|
movl EFLAGS(%esp), %eax # mix EFLAGS and CS
|
|
movb CS(%esp), %al
|
|
testl $(VM_MASK | 3), %eax
|
|
jz resume_kernel
|
|
ENTRY(resume_userspace)
|
|
cli # make sure we don't miss an interrupt
|
|
# setting need_resched or sigpending
|
|
# between sampling and the iret
|
|
movl TI_flags(%ebp), %ecx
|
|
andl $_TIF_WORK_MASK, %ecx # is there any work to be done on
|
|
# int/exception return?
|
|
jne work_pending
|
|
jmp restore_all
|
|
|
|
#ifdef CONFIG_PREEMPT
|
|
ENTRY(resume_kernel)
|
|
cli
|
|
cmpl $0,TI_preempt_count(%ebp) # non-zero preempt_count ?
|
|
jnz restore_nocheck
|
|
need_resched:
|
|
movl TI_flags(%ebp), %ecx # need_resched set ?
|
|
testb $_TIF_NEED_RESCHED, %cl
|
|
jz restore_all
|
|
testl $IF_MASK,EFLAGS(%esp) # interrupts off (exception path) ?
|
|
jz restore_all
|
|
call preempt_schedule_irq
|
|
jmp need_resched
|
|
#endif
|
|
|
|
/* SYSENTER_RETURN points to after the "sysenter" instruction in
|
|
the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */
|
|
|
|
# sysenter call handler stub
|
|
ENTRY(sysenter_entry)
|
|
movl TSS_sysenter_esp0(%esp),%esp
|
|
sysenter_past_esp:
|
|
sti
|
|
pushl $(__USER_DS)
|
|
pushl %ebp
|
|
pushfl
|
|
pushl $(__USER_CS)
|
|
pushl $SYSENTER_RETURN
|
|
|
|
/*
|
|
* Load the potential sixth argument from user stack.
|
|
* Careful about security.
|
|
*/
|
|
cmpl $__PAGE_OFFSET-3,%ebp
|
|
jae syscall_fault
|
|
1: movl (%ebp),%ebp
|
|
.section __ex_table,"a"
|
|
.align 4
|
|
.long 1b,syscall_fault
|
|
.previous
|
|
|
|
pushl %eax
|
|
SAVE_ALL
|
|
GET_THREAD_INFO(%ebp)
|
|
|
|
/* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
|
|
testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
|
|
jnz syscall_trace_entry
|
|
cmpl $(nr_syscalls), %eax
|
|
jae syscall_badsys
|
|
call *sys_call_table(,%eax,4)
|
|
movl %eax,EAX(%esp)
|
|
cli
|
|
movl TI_flags(%ebp), %ecx
|
|
testw $_TIF_ALLWORK_MASK, %cx
|
|
jne syscall_exit_work
|
|
/* if something modifies registers it must also disable sysexit */
|
|
movl EIP(%esp), %edx
|
|
movl OLDESP(%esp), %ecx
|
|
xorl %ebp,%ebp
|
|
sti
|
|
sysexit
|
|
|
|
|
|
# system call handler stub
|
|
ENTRY(system_call)
|
|
pushl %eax # save orig_eax
|
|
SAVE_ALL
|
|
GET_THREAD_INFO(%ebp)
|
|
# system call tracing in operation / emulation
|
|
/* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
|
|
testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
|
|
jnz syscall_trace_entry
|
|
cmpl $(nr_syscalls), %eax
|
|
jae syscall_badsys
|
|
syscall_call:
|
|
call *sys_call_table(,%eax,4)
|
|
movl %eax,EAX(%esp) # store the return value
|
|
syscall_exit:
|
|
cli # make sure we don't miss an interrupt
|
|
# setting need_resched or sigpending
|
|
# between sampling and the iret
|
|
movl TI_flags(%ebp), %ecx
|
|
testw $_TIF_ALLWORK_MASK, %cx # current->work
|
|
jne syscall_exit_work
|
|
|
|
restore_all:
|
|
movl EFLAGS(%esp), %eax # mix EFLAGS, SS and CS
|
|
# Warning: OLDSS(%esp) contains the wrong/random values if we
|
|
# are returning to the kernel.
|
|
# See comments in process.c:copy_thread() for details.
|
|
movb OLDSS(%esp), %ah
|
|
movb CS(%esp), %al
|
|
andl $(VM_MASK | (4 << 8) | 3), %eax
|
|
cmpl $((4 << 8) | 3), %eax
|
|
je ldt_ss # returning to user-space with LDT SS
|
|
restore_nocheck:
|
|
RESTORE_REGS
|
|
addl $4, %esp
|
|
1: iret
|
|
.section .fixup,"ax"
|
|
iret_exc:
|
|
sti
|
|
pushl $0 # no error code
|
|
pushl $do_iret_error
|
|
jmp error_code
|
|
.previous
|
|
.section __ex_table,"a"
|
|
.align 4
|
|
.long 1b,iret_exc
|
|
.previous
|
|
|
|
ldt_ss:
|
|
larl OLDSS(%esp), %eax
|
|
jnz restore_nocheck
|
|
testl $0x00400000, %eax # returning to 32bit stack?
|
|
jnz restore_nocheck # allright, normal return
|
|
/* If returning to userspace with 16bit stack,
|
|
* try to fix the higher word of ESP, as the CPU
|
|
* won't restore it.
|
|
* This is an "official" bug of all the x86-compatible
|
|
* CPUs, which we can try to work around to make
|
|
* dosemu and wine happy. */
|
|
subl $8, %esp # reserve space for switch16 pointer
|
|
cli
|
|
movl %esp, %eax
|
|
/* Set up the 16bit stack frame with switch32 pointer on top,
|
|
* and a switch16 pointer on top of the current frame. */
|
|
call setup_x86_bogus_stack
|
|
RESTORE_REGS
|
|
lss 20+4(%esp), %esp # switch to 16bit stack
|
|
1: iret
|
|
.section __ex_table,"a"
|
|
.align 4
|
|
.long 1b,iret_exc
|
|
.previous
|
|
|
|
# perform work that needs to be done immediately before resumption
|
|
ALIGN
|
|
work_pending:
|
|
testb $_TIF_NEED_RESCHED, %cl
|
|
jz work_notifysig
|
|
work_resched:
|
|
call schedule
|
|
cli # make sure we don't miss an interrupt
|
|
# setting need_resched or sigpending
|
|
# between sampling and the iret
|
|
movl TI_flags(%ebp), %ecx
|
|
andl $_TIF_WORK_MASK, %ecx # is there any work to be done other
|
|
# than syscall tracing?
|
|
jz restore_all
|
|
testb $_TIF_NEED_RESCHED, %cl
|
|
jnz work_resched
|
|
|
|
work_notifysig: # deal with pending signals and
|
|
# notify-resume requests
|
|
testl $VM_MASK, EFLAGS(%esp)
|
|
movl %esp, %eax
|
|
jne work_notifysig_v86 # returning to kernel-space or
|
|
# vm86-space
|
|
xorl %edx, %edx
|
|
call do_notify_resume
|
|
jmp resume_userspace
|
|
|
|
ALIGN
|
|
work_notifysig_v86:
|
|
#ifdef CONFIG_VM86
|
|
pushl %ecx # save ti_flags for do_notify_resume
|
|
call save_v86_state # %eax contains pt_regs pointer
|
|
popl %ecx
|
|
movl %eax, %esp
|
|
xorl %edx, %edx
|
|
call do_notify_resume
|
|
jmp resume_userspace
|
|
#endif
|
|
|
|
# perform syscall exit tracing
|
|
ALIGN
|
|
syscall_trace_entry:
|
|
movl $-ENOSYS,EAX(%esp)
|
|
movl %esp, %eax
|
|
xorl %edx,%edx
|
|
call do_syscall_trace
|
|
cmpl $0, %eax
|
|
jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU,
|
|
# so must skip actual syscall
|
|
movl ORIG_EAX(%esp), %eax
|
|
cmpl $(nr_syscalls), %eax
|
|
jnae syscall_call
|
|
jmp syscall_exit
|
|
|
|
# perform syscall exit tracing
|
|
ALIGN
|
|
syscall_exit_work:
|
|
testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl
|
|
jz work_pending
|
|
sti # could let do_syscall_trace() call
|
|
# schedule() instead
|
|
movl %esp, %eax
|
|
movl $1, %edx
|
|
call do_syscall_trace
|
|
jmp resume_userspace
|
|
|
|
ALIGN
|
|
syscall_fault:
|
|
pushl %eax # save orig_eax
|
|
SAVE_ALL
|
|
GET_THREAD_INFO(%ebp)
|
|
movl $-EFAULT,EAX(%esp)
|
|
jmp resume_userspace
|
|
|
|
ALIGN
|
|
syscall_badsys:
|
|
movl $-ENOSYS,EAX(%esp)
|
|
jmp resume_userspace
|
|
|
|
#define FIXUP_ESPFIX_STACK \
|
|
movl %esp, %eax; \
|
|
/* switch to 32bit stack using the pointer on top of 16bit stack */ \
|
|
lss %ss:CPU_16BIT_STACK_SIZE-8, %esp; \
|
|
/* copy data from 16bit stack to 32bit stack */ \
|
|
call fixup_x86_bogus_stack; \
|
|
/* put ESP to the proper location */ \
|
|
movl %eax, %esp;
|
|
#define UNWIND_ESPFIX_STACK \
|
|
pushl %eax; \
|
|
movl %ss, %eax; \
|
|
/* see if on 16bit stack */ \
|
|
cmpw $__ESPFIX_SS, %ax; \
|
|
jne 28f; \
|
|
movl $__KERNEL_DS, %edx; \
|
|
movl %edx, %ds; \
|
|
movl %edx, %es; \
|
|
/* switch to 32bit stack */ \
|
|
FIXUP_ESPFIX_STACK \
|
|
28: popl %eax;
|
|
|
|
/*
|
|
* Build the entry stubs and pointer table with
|
|
* some assembler magic.
|
|
*/
|
|
.data
|
|
ENTRY(interrupt)
|
|
.text
|
|
|
|
vector=0
|
|
ENTRY(irq_entries_start)
|
|
.rept NR_IRQS
|
|
ALIGN
|
|
1: pushl $vector-256
|
|
jmp common_interrupt
|
|
.data
|
|
.long 1b
|
|
.text
|
|
vector=vector+1
|
|
.endr
|
|
|
|
ALIGN
|
|
common_interrupt:
|
|
SAVE_ALL
|
|
movl %esp,%eax
|
|
call do_IRQ
|
|
jmp ret_from_intr
|
|
|
|
#define BUILD_INTERRUPT(name, nr) \
|
|
ENTRY(name) \
|
|
pushl $nr-256; \
|
|
SAVE_ALL \
|
|
movl %esp,%eax; \
|
|
call smp_/**/name; \
|
|
jmp ret_from_intr;
|
|
|
|
/* The include is where all of the SMP etc. interrupts come from */
|
|
#include "entry_arch.h"
|
|
|
|
ENTRY(divide_error)
|
|
pushl $0 # no error code
|
|
pushl $do_divide_error
|
|
ALIGN
|
|
error_code:
|
|
pushl %ds
|
|
pushl %eax
|
|
xorl %eax, %eax
|
|
pushl %ebp
|
|
pushl %edi
|
|
pushl %esi
|
|
pushl %edx
|
|
decl %eax # eax = -1
|
|
pushl %ecx
|
|
pushl %ebx
|
|
cld
|
|
pushl %es
|
|
UNWIND_ESPFIX_STACK
|
|
popl %ecx
|
|
movl ES(%esp), %edi # get the function address
|
|
movl ORIG_EAX(%esp), %edx # get the error code
|
|
movl %eax, ORIG_EAX(%esp)
|
|
movl %ecx, ES(%esp)
|
|
movl $(__USER_DS), %ecx
|
|
movl %ecx, %ds
|
|
movl %ecx, %es
|
|
movl %esp,%eax # pt_regs pointer
|
|
call *%edi
|
|
jmp ret_from_exception
|
|
|
|
ENTRY(coprocessor_error)
|
|
pushl $0
|
|
pushl $do_coprocessor_error
|
|
jmp error_code
|
|
|
|
ENTRY(simd_coprocessor_error)
|
|
pushl $0
|
|
pushl $do_simd_coprocessor_error
|
|
jmp error_code
|
|
|
|
ENTRY(device_not_available)
|
|
pushl $-1 # mark this as an int
|
|
SAVE_ALL
|
|
movl %cr0, %eax
|
|
testl $0x4, %eax # EM (math emulation bit)
|
|
jne device_not_available_emulate
|
|
preempt_stop
|
|
call math_state_restore
|
|
jmp ret_from_exception
|
|
device_not_available_emulate:
|
|
pushl $0 # temporary storage for ORIG_EIP
|
|
call math_emulate
|
|
addl $4, %esp
|
|
jmp ret_from_exception
|
|
|
|
/*
|
|
* Debug traps and NMI can happen at the one SYSENTER instruction
|
|
* that sets up the real kernel stack. Check here, since we can't
|
|
* allow the wrong stack to be used.
|
|
*
|
|
* "TSS_sysenter_esp0+12" is because the NMI/debug handler will have
|
|
* already pushed 3 words if it hits on the sysenter instruction:
|
|
* eflags, cs and eip.
|
|
*
|
|
* We just load the right stack, and push the three (known) values
|
|
* by hand onto the new stack - while updating the return eip past
|
|
* the instruction that would have done it for sysenter.
|
|
*/
|
|
#define FIX_STACK(offset, ok, label) \
|
|
cmpw $__KERNEL_CS,4(%esp); \
|
|
jne ok; \
|
|
label: \
|
|
movl TSS_sysenter_esp0+offset(%esp),%esp; \
|
|
pushfl; \
|
|
pushl $__KERNEL_CS; \
|
|
pushl $sysenter_past_esp
|
|
|
|
KPROBE_ENTRY(debug)
|
|
cmpl $sysenter_entry,(%esp)
|
|
jne debug_stack_correct
|
|
FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn)
|
|
debug_stack_correct:
|
|
pushl $-1 # mark this as an int
|
|
SAVE_ALL
|
|
xorl %edx,%edx # error code 0
|
|
movl %esp,%eax # pt_regs pointer
|
|
call do_debug
|
|
jmp ret_from_exception
|
|
.previous .text
|
|
/*
|
|
* NMI is doubly nasty. It can happen _while_ we're handling
|
|
* a debug fault, and the debug fault hasn't yet been able to
|
|
* clear up the stack. So we first check whether we got an
|
|
* NMI on the sysenter entry path, but after that we need to
|
|
* check whether we got an NMI on the debug path where the debug
|
|
* fault happened on the sysenter path.
|
|
*/
|
|
ENTRY(nmi)
|
|
pushl %eax
|
|
movl %ss, %eax
|
|
cmpw $__ESPFIX_SS, %ax
|
|
popl %eax
|
|
je nmi_16bit_stack
|
|
cmpl $sysenter_entry,(%esp)
|
|
je nmi_stack_fixup
|
|
pushl %eax
|
|
movl %esp,%eax
|
|
/* Do not access memory above the end of our stack page,
|
|
* it might not exist.
|
|
*/
|
|
andl $(THREAD_SIZE-1),%eax
|
|
cmpl $(THREAD_SIZE-20),%eax
|
|
popl %eax
|
|
jae nmi_stack_correct
|
|
cmpl $sysenter_entry,12(%esp)
|
|
je nmi_debug_stack_check
|
|
nmi_stack_correct:
|
|
pushl %eax
|
|
SAVE_ALL
|
|
xorl %edx,%edx # zero error code
|
|
movl %esp,%eax # pt_regs pointer
|
|
call do_nmi
|
|
jmp restore_all
|
|
|
|
nmi_stack_fixup:
|
|
FIX_STACK(12,nmi_stack_correct, 1)
|
|
jmp nmi_stack_correct
|
|
nmi_debug_stack_check:
|
|
cmpw $__KERNEL_CS,16(%esp)
|
|
jne nmi_stack_correct
|
|
cmpl $debug,(%esp)
|
|
jb nmi_stack_correct
|
|
cmpl $debug_esp_fix_insn,(%esp)
|
|
ja nmi_stack_correct
|
|
FIX_STACK(24,nmi_stack_correct, 1)
|
|
jmp nmi_stack_correct
|
|
|
|
nmi_16bit_stack:
|
|
/* create the pointer to lss back */
|
|
pushl %ss
|
|
pushl %esp
|
|
movzwl %sp, %esp
|
|
addw $4, (%esp)
|
|
/* copy the iret frame of 12 bytes */
|
|
.rept 3
|
|
pushl 16(%esp)
|
|
.endr
|
|
pushl %eax
|
|
SAVE_ALL
|
|
FIXUP_ESPFIX_STACK # %eax == %esp
|
|
xorl %edx,%edx # zero error code
|
|
call do_nmi
|
|
RESTORE_REGS
|
|
lss 12+4(%esp), %esp # back to 16bit stack
|
|
1: iret
|
|
.section __ex_table,"a"
|
|
.align 4
|
|
.long 1b,iret_exc
|
|
.previous
|
|
|
|
KPROBE_ENTRY(int3)
|
|
pushl $-1 # mark this as an int
|
|
SAVE_ALL
|
|
xorl %edx,%edx # zero error code
|
|
movl %esp,%eax # pt_regs pointer
|
|
call do_int3
|
|
jmp ret_from_exception
|
|
.previous .text
|
|
|
|
ENTRY(overflow)
|
|
pushl $0
|
|
pushl $do_overflow
|
|
jmp error_code
|
|
|
|
ENTRY(bounds)
|
|
pushl $0
|
|
pushl $do_bounds
|
|
jmp error_code
|
|
|
|
ENTRY(invalid_op)
|
|
pushl $0
|
|
pushl $do_invalid_op
|
|
jmp error_code
|
|
|
|
ENTRY(coprocessor_segment_overrun)
|
|
pushl $0
|
|
pushl $do_coprocessor_segment_overrun
|
|
jmp error_code
|
|
|
|
ENTRY(invalid_TSS)
|
|
pushl $do_invalid_TSS
|
|
jmp error_code
|
|
|
|
ENTRY(segment_not_present)
|
|
pushl $do_segment_not_present
|
|
jmp error_code
|
|
|
|
ENTRY(stack_segment)
|
|
pushl $do_stack_segment
|
|
jmp error_code
|
|
|
|
KPROBE_ENTRY(general_protection)
|
|
pushl $do_general_protection
|
|
jmp error_code
|
|
.previous .text
|
|
|
|
ENTRY(alignment_check)
|
|
pushl $do_alignment_check
|
|
jmp error_code
|
|
|
|
KPROBE_ENTRY(page_fault)
|
|
pushl $do_page_fault
|
|
jmp error_code
|
|
.previous .text
|
|
|
|
#ifdef CONFIG_X86_MCE
|
|
ENTRY(machine_check)
|
|
pushl $0
|
|
pushl machine_check_vector
|
|
jmp error_code
|
|
#endif
|
|
|
|
ENTRY(spurious_interrupt_bug)
|
|
pushl $0
|
|
pushl $do_spurious_interrupt_bug
|
|
jmp error_code
|
|
|
|
.section .rodata,"a"
|
|
#include "syscall_table.S"
|
|
|
|
syscall_table_size=(.-sys_call_table)
|