entry.s

linux 内核源代码

ENTRY(_ex_table)
	/* entry for each EXCAUSE[5:0]
	 * This table must be in sync with the table in ./kernel/traps.c
	 * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined
	 */
	.long _ex_syscall       /* 0x00 - User Defined - Linux Syscall */
	.long _ex_soft_bp       /* 0x01 - User Defined - Software breakpoint */
	.long _ex_replaceable   /* 0x02 - User Defined */
	.long _ex_trap_c        /* 0x03 - User Defined - userspace stack overflow */
	.long _ex_trap_c        /* 0x04 - User Defined - dump trace buffer */
	.long _ex_replaceable   /* 0x05 - User Defined */
	.long _ex_replaceable   /* 0x06 - User Defined */
	.long _ex_replaceable   /* 0x07 - User Defined */
	.long _ex_replaceable   /* 0x08 - User Defined */
	.long _ex_replaceable   /* 0x09 - User Defined */
	.long _ex_replaceable   /* 0x0A - User Defined */
	.long _ex_replaceable   /* 0x0B - User Defined */
	.long _ex_replaceable   /* 0x0C - User Defined */
	.long _ex_replaceable   /* 0x0D - User Defined */
	.long _ex_replaceable   /* 0x0E - User Defined */
	.long _ex_replaceable   /* 0x0F - User Defined */
	.long _ex_single_step   /* 0x10 - HW Single step */
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
	.long _ex_trace_buff_full /* 0x11 - Trace Buffer Full */
#else
	.long _ex_trap_c        /* 0x11 - Trace Buffer Full */
#endif
	.long _ex_trap_c        /* 0x12 - Reserved */
	.long _ex_trap_c        /* 0x13 - Reserved */
	.long _ex_trap_c        /* 0x14 - Reserved */
	.long _ex_trap_c        /* 0x15 - Reserved */
	.long _ex_trap_c        /* 0x16 - Reserved */
	.long _ex_trap_c        /* 0x17 - Reserved */
	.long _ex_trap_c        /* 0x18 - Reserved */
	.long _ex_trap_c        /* 0x19 - Reserved */
	.long _ex_trap_c        /* 0x1A - Reserved */
	.long _ex_trap_c        /* 0x1B - Reserved */
	.long _ex_trap_c        /* 0x1C - Reserved */
	.long _ex_trap_c        /* 0x1D - Reserved */
	.long _ex_trap_c        /* 0x1E - Reserved */
	.long _ex_trap_c        /* 0x1F - Reserved */
	.long _ex_trap_c        /* 0x20 - Reserved */
	.long _ex_trap_c        /* 0x21 - Undefined Instruction */
	.long _ex_trap_c        /* 0x22 - Illegal Instruction Combination */
	.long _ex_dviol         /* 0x23 - Data CPLB Protection Violation */
	.long _ex_trap_c        /* 0x24 - Data access misaligned */
	.long _ex_trap_c        /* 0x25 - Unrecoverable Event */
	.long _ex_dmiss         /* 0x26 - Data CPLB Miss */
	.long _ex_dmult         /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero */
	.long _ex_trap_c        /* 0x28 - Emulation Watchpoint */
	.long _ex_trap_c        /* 0x29 - Instruction fetch access error (535 only) */
	.long _ex_trap_c        /* 0x2A - Instruction fetch misaligned */
	.long _ex_trap_c        /* 0x2B - Instruction CPLB protection Violation */
	.long _ex_icplb_miss    /* 0x2C - Instruction CPLB miss */
	.long _ex_trap_c        /* 0x2D - Instruction CPLB Multiple Hits */
	.long _ex_trap_c        /* 0x2E - Illegal use of Supervisor Resource */
	.long _ex_trap_c        /* 0x2E - Illegal use of Supervisor Resource */
	.long _ex_trap_c        /* 0x2F - Reserved */
	.long _ex_trap_c        /* 0x30 - Reserved */
	.long _ex_trap_c        /* 0x31 - Reserved */
	.long _ex_trap_c        /* 0x32 - Reserved */
	.long _ex_trap_c        /* 0x33 - Reserved */
	.long _ex_trap_c        /* 0x34 - Reserved */
	.long _ex_trap_c        /* 0x35 - Reserved */
	.long _ex_trap_c        /* 0x36 - Reserved */
	.long _ex_trap_c        /* 0x37 - Reserved */
	.long _ex_trap_c        /* 0x38 - Reserved */
	.long _ex_trap_c        /* 0x39 - Reserved */
	.long _ex_trap_c        /* 0x3A - Reserved */
	.long _ex_trap_c        /* 0x3B - Reserved */
	.long _ex_trap_c        /* 0x3C - Reserved */
	.long _ex_trap_c        /* 0x3D - Reserved */
	.long _ex_trap_c        /* 0x3E - Reserved */
	.long _ex_trap_c        /* 0x3F - Reserved */
END(_ex_table)

ENTRY(_sys_call_table)
	.long _sys_restart_syscall	/* 0 */
	.long _sys_exit
	.long _sys_fork
	.long _sys_read
	.long _sys_write
	.long _sys_open		/* 5 */
	.long _sys_close
	.long _sys_ni_syscall	/* old 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_chown	/* chown16 */
	.long _sys_ni_syscall	/* old break syscall holder */
	.long _sys_ni_syscall	/* old stat */
	.long _sys_lseek
	.long _sys_getpid	/* 20 */
	.long _sys_mount
	.long _sys_ni_syscall	/* old umount */
	.long _sys_setuid
	.long _sys_getuid
	.long _sys_stime		/* 25 */
	.long _sys_ptrace
	.long _sys_alarm
	.long _sys_ni_syscall	/* old fstat */
	.long _sys_pause
	.long _sys_ni_syscall	/* old 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_setgid
	.long _sys_getgid
	.long _sys_ni_syscall	/* old sys_signal */
	.long _sys_geteuid	/* geteuid16 */
	.long _sys_getegid	/* 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_ni_syscall	/* old old uname */
	.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_ni_syscall	/* old sys_sigaction */
	.long _sys_sgetmask
	.long _sys_ssetmask
	.long _sys_setreuid	/* setreuid16 */	/* 70 */
	.long _sys_setregid	/* setregid16 */
	.long _sys_ni_syscall	/* old sys_sigsuspend */
	.long _sys_ni_syscall	/* old sys_sigpending */
	.long _sys_sethostname
	.long _sys_setrlimit	/* 75 */
	.long _sys_ni_syscall	/* old getrlimit */
	.long _sys_getrusage
	.long _sys_gettimeofday
	.long _sys_settimeofday
	.long _sys_getgroups	/* getgroups16 */	/* 80 */
	.long _sys_setgroups	/* setgroups16 */
	.long _sys_ni_syscall	/* old_select */
	.long _sys_symlink
	.long _sys_ni_syscall	/* old lstat */
	.long _sys_readlink	/* 85 */
	.long _sys_uselib
	.long _sys_ni_syscall	/* sys_swapon */
	.long _sys_reboot
	.long _sys_ni_syscall	/* old_readdir */
	.long _sys_ni_syscall	/* sys_mmap */	/* 90 */
	.long _sys_munmap
	.long _sys_truncate
	.long _sys_ftruncate
	.long _sys_fchmod
	.long _sys_fchown	/* 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_ni_syscall
	.long _sys_ni_syscall	/* old sys_socketcall */
	.long _sys_syslog
	.long _sys_setitimer
	.long _sys_getitimer	/* 105 */
	.long _sys_newstat
	.long _sys_newlstat
	.long _sys_newfstat
	.long _sys_ni_syscall	/* old uname */
	.long _sys_ni_syscall	/* iopl for i386 */ /* 110 */
	.long _sys_vhangup
	.long _sys_ni_syscall	/* obsolete idle() syscall */
	.long _sys_ni_syscall	/* vm86old for i386 */
	.long _sys_wait4
	.long _sys_ni_syscall	/* 115 */ /* sys_swapoff */
	.long _sys_sysinfo
	.long _sys_ni_syscall	/* old sys_ipc */
	.long _sys_fsync
	.long _sys_ni_syscall	/* old sys_sigreturn */
	.long _sys_clone		/* 120 */
	.long _sys_setdomainname
	.long _sys_newuname
	.long _sys_ni_syscall	/* old sys_modify_ldt */
	.long _sys_adjtimex
	.long _sys_ni_syscall	/* 125 */ /* sys_mprotect */
	.long _sys_ni_syscall	/* old sys_sigprocmask */
	.long _sys_ni_syscall	/* old "creat_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_ni_syscall	/* 135 */ /* sys_sysfs */
	.long _sys_personality
	.long _sys_ni_syscall	/* for afs_syscall */
	.long _sys_setfsuid	/* setfsuid16 */
	.long _sys_setfsgid	/* setfsgid16 */
	.long _sys_llseek	/* 140 */
	.long _sys_getdents
	.long _sys_ni_syscall	/* sys_select */
	.long _sys_flock
	.long _sys_ni_syscall	/* sys_msync */
	.long _sys_readv		/* 145 */
	.long _sys_writev
	.long _sys_getsid
	.long _sys_fdatasync
	.long _sys_sysctl
	.long _sys_ni_syscall	/* 150 */ /* sys_mlock */
	.long _sys_ni_syscall	/* sys_munlock */
	.long _sys_ni_syscall	/* sys_mlockall */
	.long _sys_ni_syscall	/* 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_setresuid	/* setresuid16 */
	.long _sys_getresuid	/* getresuid16 */	/* 165 */
	.long _sys_ni_syscall	/* for vm86 */
	.long _sys_ni_syscall	/* old "query_module" */
	.long _sys_ni_syscall	/* sys_poll */
	.long _sys_nfsservctl
	.long _sys_setresgid	/* setresgid16 */	/* 170 */
	.long _sys_getresgid	/* 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_lchown	/* lchown16 */
	.long _sys_getcwd
	.long _sys_capget
	.long _sys_capset	/* 185 */
	.long _sys_sigaltstack
	.long _sys_sendfile
	.long _sys_ni_syscall	/* streams1 */
	.long _sys_ni_syscall	/* 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_chown
	.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_lchown
	.long _sys_setuid
	.long _sys_setgid
	.long _sys_setfsuid	/* 215 */
	.long _sys_setfsgid
	.long _sys_pivot_root
	.long _sys_ni_syscall	/* sys_mincore */
	.long _sys_ni_syscall	/* 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_ni_syscall	/* sys_set_thread_area */
	.long _sys_ni_syscall	/* 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_ni_syscall	/* 250 */ /* sys_alloc_hugepages */
	.long _sys_ni_syscall	/* sys_freec_hugepages */
	.long _sys_exit_group
	.long _sys_lookup_dcookie
	.long _sys_bfin_spinlock
	.long _sys_epoll_create	/* 255 */
	.long _sys_epoll_ctl
	.long _sys_epoll_wait
	.long _sys_ni_syscall /* remap_file_pages */
	.long _sys_set_tid_address
	.long _sys_timer_create	/* 260 */
	.long _sys_timer_settime
	.long _sys_timer_gettime
	.long _sys_timer_getoverrun
	.long _sys_timer_delete
	.long _sys_clock_settime /* 265 */
	.long _sys_clock_gettime
	.long _sys_clock_getres
	.long _sys_clock_nanosleep
	.long _sys_statfs64
	.long _sys_fstatfs64	/* 270 */
	.long _sys_tgkill
	.long _sys_utimes
	.long _sys_fadvise64_64
	.long _sys_ni_syscall /* vserver */
	.long _sys_ni_syscall /* 275, mbind */
	.long _sys_ni_syscall /* get_mempolicy */
	.long _sys_ni_syscall /* set_mempolicy */
	.long _sys_mq_open
	.long _sys_mq_unlink
	.long _sys_mq_timedsend	/* 280 */
	.long _sys_mq_timedreceive
	.long _sys_mq_notify
	.long _sys_mq_getsetattr
	.long _sys_ni_syscall /* kexec_load */
	.long _sys_waitid	/* 285 */
	.long _sys_add_key
	.long _sys_request_key
	.long _sys_keyctl
	.long _sys_ioprio_set
	.long _sys_ioprio_get	/* 290 */
	.long _sys_inotify_init
	.long _sys_inotify_add_watch
	.long _sys_inotify_rm_watch
	.long _sys_ni_syscall /* migrate_pages */
	.long _sys_openat	/* 295 */
	.long _sys_mkdirat
	.long _sys_mknodat
	.long _sys_fchownat
	.long _sys_futimesat
	.long _sys_fstatat64	/* 300 */
	.long _sys_unlinkat
	.long _sys_renameat
	.long _sys_linkat
	.long _sys_symlinkat
	.long _sys_readlinkat	/* 305 */
	.long _sys_fchmodat
	.long _sys_faccessat
	.long _sys_pselect6
	.long _sys_ppoll
	.long _sys_unshare	/* 310 */
	.long _sys_sram_alloc
	.long _sys_sram_free
	.long _sys_dma_memcpy
	.long _sys_accept
	.long _sys_bind		/* 315 */
	.long _sys_connect
	.long _sys_getpeername
	.long _sys_getsockname
	.long _sys_getsockopt
	.long _sys_listen	/* 320 */
	.long _sys_recv
	.long _sys_recvfrom
	.long _sys_recvmsg
	.long _sys_send
	.long _sys_sendmsg	/* 325 */
	.long _sys_sendto
	.long _sys_setsockopt
	.long _sys_shutdown
	.long _sys_socket
	.long _sys_socketpair	/* 330 */
	.long _sys_semctl
	.long _sys_semget
	.long _sys_semop
	.long _sys_msgctl
	.long _sys_msgget	/* 335 */
	.long _sys_msgrcv
	.long _sys_msgsnd
	.long _sys_shmat
	.long _sys_shmctl
	.long _sys_shmdt	/* 340 */
	.long _sys_shmget
	.long _sys_splice
	.long _sys_sync_file_range
	.long _sys_tee
	.long _sys_vmsplice	/* 345 */
	.long _sys_epoll_pwait
	.long _sys_utimensat
	.long _sys_signalfd
	.long _sys_timerfd
	.long _sys_eventfd	/* 350 */
	.long _sys_pread64
	.long _sys_pwrite64
	.long _sys_fadvise64
	.long _sys_set_robust_list
	.long _sys_get_robust_list	/* 355 */
	.long _sys_fallocate
	.rept NR_syscalls-(.-_sys_call_table)/4
	.long _sys_ni_syscall
	.endr
_excpt_saved_imask:
	.long 0;

_exception_stack:
	.rept 1024
	.long 0;
	.endr
_exception_stack_top:

#if ANOMALY_05000261
/* Used by the assembly entry point to work around an anomaly.  */
_last_cplb_fault_retx:
	.long 0;
#endif
/*
 * Single instructions can have multiple faults, which need to be
 * handled by traps.c, in irq5. We store the exception cause to ensure
 * we don't miss a double fault condition
 */
ENTRY(_in_ptr_excause)
	.long 0;
ENTRY(_out_ptr_excause)
	.long 0;
ALIGN
ENTRY(_excause_circ_buf)
	.rept 4
	.long 0
	.endr