entry.s

来自「Linux Kernel 2.6.9 for OMAP1710」· S 代码 · 共 906 行 · 第 1/2 页

	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

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
	movl %esp,%edx
  	pushl $0
	pushl %edx
	call do_debug
	addl $8,%esp
	testl %eax,%eax
	jnz restore_all
	jmp ret_from_exception

/*
 * 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)
	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
	movl %esp, %edx
	pushl $0
	pushl %edx
	call do_nmi
	addl $8, %esp
	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 - 1,(%esp)
	jle nmi_stack_correct
	cmpl $debug_esp_fix_insn,(%esp)
	jle nmi_debug_stack_fixup
nmi_debug_stack_fixup:
	FIX_STACK(24,nmi_stack_correct, 1)
	jmp nmi_stack_correct

ENTRY(int3)
	pushl $-1			# mark this as an int
	SAVE_ALL
	movl %esp,%edx
	pushl $0
	pushl %edx
	call do_int3
	addl $8,%esp
	testl %eax,%eax
	jnz restore_all
	jmp ret_from_exception

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

ENTRY(general_protection)
	pushl $do_general_protection
	jmp error_code

ENTRY(alignment_check)
	pushl $do_alignment_check
	jmp error_code

ENTRY(page_fault)
	pushl $do_page_fault
	jmp error_code

#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

.data
ENTRY(sys_call_table)
	.long sys_restart_syscall	/* 0 - old "setup()" system call, used for restarting */
	.long sys_exit
	.long sys_fork
	.long sys_read
	.long sys_write
	.long sys_open		/* 5 */
	.long sys_close
	.long sys_waitpid
	.long sys_creat
	.long sys_link
	.long sys_unlink	/* 10 */
	.long sys_execve
	.long sys_chdir
	.long sys_time
	.long sys_mknod
	.long sys_chmod		/* 15 */
	.long sys_lchown16
	.long sys_ni_syscall	/* old break syscall holder */
	.long sys_stat
	.long sys_lseek
	.long sys_getpid	/* 20 */
	.long sys_mount
	.long sys_oldumount
	.long sys_setuid16
	.long sys_getuid16
	.long sys_stime		/* 25 */
	.long sys_ptrace
	.long sys_alarm
	.long sys_fstat
	.long sys_pause
	.long sys_utime		/* 30 */
	.long sys_ni_syscall	/* old stty syscall holder */
	.long sys_ni_syscall	/* old gtty syscall holder */
	.long sys_access
	.long sys_nice
	.long sys_ni_syscall	/* 35 - old ftime syscall holder */
	.long sys_sync
	.long sys_kill
	.long sys_rename
	.long sys_mkdir
	.long sys_rmdir		/* 40 */
	.long sys_dup
	.long sys_pipe
	.long sys_times
	.long sys_ni_syscall	/* old prof syscall holder */
	.long sys_brk		/* 45 */
	.long sys_setgid16
	.long sys_getgid16
	.long sys_signal
	.long sys_geteuid16
	.long sys_getegid16	/* 50 */
	.long sys_acct
	.long sys_umount	/* recycled never used phys() */
	.long sys_ni_syscall	/* old lock syscall holder */
	.long sys_ioctl
	.long sys_fcntl		/* 55 */
	.long sys_ni_syscall	/* old mpx syscall holder */
	.long sys_setpgid
	.long sys_ni_syscall	/* old ulimit syscall holder */
	.long sys_olduname
	.long sys_umask		/* 60 */
	.long sys_chroot
	.long sys_ustat
	.long sys_dup2
	.long sys_getppid
	.long sys_getpgrp	/* 65 */
	.long sys_setsid
	.long sys_sigaction
	.long sys_sgetmask
	.long sys_ssetmask
	.long sys_setreuid16	/* 70 */
	.long sys_setregid16
	.long sys_sigsuspend
	.long sys_sigpending
	.long sys_sethostname
	.long sys_setrlimit	/* 75 */
	.long sys_old_getrlimit
	.long sys_getrusage
	.long sys_gettimeofday
	.long sys_settimeofday
	.long sys_getgroups16	/* 80 */
	.long sys_setgroups16
	.long old_select
	.long sys_symlink
	.long sys_lstat
	.long sys_readlink	/* 85 */
	.long sys_uselib
	.long sys_swapon
	.long sys_reboot
	.long old_readdir
	.long old_mmap		/* 90 */
	.long sys_munmap
	.long sys_truncate
	.long sys_ftruncate
	.long sys_fchmod
	.long sys_fchown16	/* 95 */
	.long sys_getpriority
	.long sys_setpriority
	.long sys_ni_syscall	/* old profil syscall holder */
	.long sys_statfs
	.long sys_fstatfs	/* 100 */
	.long sys_ioperm
	.long sys_socketcall
	.long sys_syslog
	.long sys_setitimer
	.long sys_getitimer	/* 105 */
	.long sys_newstat
	.long sys_newlstat
	.long sys_newfstat
	.long sys_uname
	.long sys_iopl		/* 110 */
	.long sys_vhangup
	.long sys_ni_syscall	/* old "idle" system call */
	.long sys_vm86old
	.long sys_wait4
	.long sys_swapoff	/* 115 */
	.long sys_sysinfo
	.long sys_ipc
	.long sys_fsync
	.long sys_sigreturn
	.long sys_clone		/* 120 */
	.long sys_setdomainname
	.long sys_newuname
	.long sys_modify_ldt
	.long sys_adjtimex
	.long sys_mprotect	/* 125 */
	.long sys_sigprocmask
	.long sys_ni_syscall	/* old "create_module" */ 
	.long sys_init_module
	.long sys_delete_module
	.long sys_ni_syscall	/* 130:	old "get_kernel_syms" */
	.long sys_quotactl
	.long sys_getpgid
	.long sys_fchdir
	.long sys_bdflush
	.long sys_sysfs		/* 135 */
	.long sys_personality
	.long sys_ni_syscall	/* reserved for afs_syscall */
	.long sys_setfsuid16
	.long sys_setfsgid16
	.long sys_llseek	/* 140 */
	.long sys_getdents
	.long sys_select
	.long sys_flock
	.long sys_msync
	.long sys_readv		/* 145 */
	.long sys_writev
	.long sys_getsid
	.long sys_fdatasync
	.long sys_sysctl
	.long sys_mlock		/* 150 */
	.long sys_munlock
	.long sys_mlockall
	.long sys_munlockall
	.long sys_sched_setparam
	.long sys_sched_getparam   /* 155 */
	.long sys_sched_setscheduler
	.long sys_sched_getscheduler
	.long sys_sched_yield
	.long sys_sched_get_priority_max
	.long sys_sched_get_priority_min  /* 160 */
	.long sys_sched_rr_get_interval
	.long sys_nanosleep
	.long sys_mremap
	.long sys_setresuid16
	.long sys_getresuid16	/* 165 */
	.long sys_vm86
	.long sys_ni_syscall	/* Old sys_query_module */
	.long sys_poll
	.long sys_nfsservctl
	.long sys_setresgid16	/* 170 */
	.long sys_getresgid16
	.long sys_prctl
	.long sys_rt_sigreturn
	.long sys_rt_sigaction
	.long sys_rt_sigprocmask	/* 175 */
	.long sys_rt_sigpending
	.long sys_rt_sigtimedwait
	.long sys_rt_sigqueueinfo
	.long sys_rt_sigsuspend
	.long sys_pread64	/* 180 */
	.long sys_pwrite64
	.long sys_chown16
	.long sys_getcwd
	.long sys_capget
	.long sys_capset	/* 185 */
	.long sys_sigaltstack
	.long sys_sendfile
	.long sys_ni_syscall	/* reserved for streams1 */
	.long sys_ni_syscall	/* reserved for streams2 */
	.long sys_vfork		/* 190 */
	.long sys_getrlimit
	.long sys_mmap2
	.long sys_truncate64
	.long sys_ftruncate64
	.long sys_stat64	/* 195 */
	.long sys_lstat64
	.long sys_fstat64
	.long sys_lchown
	.long sys_getuid
	.long sys_getgid	/* 200 */
	.long sys_geteuid
	.long sys_getegid
	.long sys_setreuid
	.long sys_setregid
	.long sys_getgroups	/* 205 */
	.long sys_setgroups
	.long sys_fchown
	.long sys_setresuid
	.long sys_getresuid
	.long sys_setresgid	/* 210 */
	.long sys_getresgid
	.long sys_chown
	.long sys_setuid
	.long sys_setgid
	.long sys_setfsuid	/* 215 */
	.long sys_setfsgid
	.long sys_pivot_root
	.long sys_mincore
	.long sys_madvise
	.long sys_getdents64	/* 220 */
	.long sys_fcntl64
	.long sys_ni_syscall	/* reserved for TUX */
	.long sys_ni_syscall
	.long sys_gettid
	.long sys_readahead	/* 225 */
	.long sys_setxattr
	.long sys_lsetxattr
	.long sys_fsetxattr
	.long sys_getxattr
	.long sys_lgetxattr	/* 230 */
	.long sys_fgetxattr
	.long sys_listxattr
	.long sys_llistxattr
	.long sys_flistxattr
	.long sys_removexattr	/* 235 */
	.long sys_lremovexattr
	.long sys_fremovexattr
	.long sys_tkill
	.long sys_sendfile64
	.long sys_futex		/* 240 */
	.long sys_sched_setaffinity
	.long sys_sched_getaffinity
	.long sys_set_thread_area
	.long sys_get_thread_area
	.long sys_io_setup	/* 245 */
	.long sys_io_destroy
	.long sys_io_getevents
	.long sys_io_submit
	.long sys_io_cancel
	.long sys_fadvise64	/* 250 */
	.long sys_ni_syscall
	.long sys_exit_group
	.long sys_lookup_dcookie
	.long sys_epoll_create
	.long sys_epoll_ctl	/* 255 */
	.long sys_epoll_wait
 	.long sys_remap_file_pages
 	.long sys_set_tid_address
 	.long sys_timer_create
 	.long sys_timer_settime		/* 260 */
 	.long sys_timer_gettime
 	.long sys_timer_getoverrun
 	.long sys_timer_delete
 	.long sys_clock_settime
 	.long sys_clock_gettime		/* 265 */
 	.long sys_clock_getres
 	.long sys_clock_nanosleep
	.long sys_statfs64
	.long sys_fstatfs64	
	.long sys_tgkill	/* 270 */
	.long sys_utimes
 	.long sys_fadvise64_64
	.long sys_ni_syscall	/* sys_vserver */
	.long sys_mbind
	.long sys_get_mempolicy
	.long sys_set_mempolicy
	.long sys_mq_open
	.long sys_mq_unlink
	.long sys_mq_timedsend
	.long sys_mq_timedreceive	/* 280 */
	.long sys_mq_notify
	.long sys_mq_getsetattr
	.long sys_ni_syscall		/* reserved for kexec */
	.long sys_waitid

syscall_table_size=(.-sys_call_table)