scall_64.S
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:7k
- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01 by Ralf Baechle
- * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
- * Copyright (C) 2001 MIPS Technologies, Inc.
- */
- #include <linux/config.h>
- #include <asm/asm.h>
- #include <linux/errno.h>
- #include <asm/current.h>
- #include <asm/mipsregs.h>
- #include <asm/regdef.h>
- #include <asm/stackframe.h>
- #include <asm/unistd.h>
- /* This duplicates the definition from <linux/sched.h> */
- #define PT_TRACESYS 0x00000002 /* tracing system calls */
- /* This duplicates the definition from <asm/signal.h> */
- #define SIGILL 4 /* Illegal instruction (ANSI). */
- #ifndef CONFIG_MIPS32_COMPAT
- #define handle_sys64 handle_sys
- #endif
- .align 5
- NESTED(handle_sys64, PT_SIZE, sp)
- /* When 32-bit compatibility is configured scall_o32.S already did this. */
- #ifndef CONFIG_MIPS32_COMPAT
- .set noat
- SAVE_SOME
- STI
- .set at
- #endif
- ld t1, PT_EPC(sp) # skip syscall on return
- subu t0, v0, __NR_Linux # check syscall number
- sltiu t0, t0, __NR_Linux_syscalls + 1
- daddiu t1, 4 # skip to next instruction
- beqz t0, illegal_syscall
- sd t1, PT_EPC(sp)
- dsll t0, v0, 3 # offset into table
- ld t2, (sys_call_table - (__NR_Linux * 8))(t0) # syscall routine
- sd a3, PT_R26(sp) # save a3 for syscall restarting
- ld t0, TASK_PTRACE($28) # syscall tracing enabled?
- andi t0, PT_TRACESYS
- bnez t0, trace_a_syscall
- jalr t2 # Do The Real Thing (TM)
- li t0, -EMAXERRNO - 1 # error?
- sltu t0, t0, v0
- sd t0, PT_R7(sp) # set error flag
- beqz t0, 1f
- negu v0 # error
- sd v0, PT_R0(sp) # set flag for syscall restarting
- 1: sd v0, PT_R2(sp) # result
- ret_from_sys_call:
- mfc0 t0, CP0_STATUS
- xori t0, t0, 1
- ori t0, t0, 1
- mtc0 t0, CP0_STATUS
- ld t2, TASK_NEED_RESCHED($28)
- bnez t2, reschedule
- lw v0, TASK_SIGPENDING($28)
- bnez v0, signal_return
- restore_all:
- RESTORE_SOME
- RESTORE_SP
- eret
- /* Put this behind restore_all for the sake of the branch prediction. */
- signal_return:
- .type signal_return, @function
- mfc0 t0, CP0_STATUS
- ori t0, t0, 1
- mtc0 t0, CP0_STATUS
- move a0, zero
- move a1, sp
- jal do_signal
- b restore_all
- reschedule:
- SAVE_STATIC
- jal schedule
- b ret_from_sys_call
- /* ------------------------------------------------------------------------ */
- trace_a_syscall:
- SAVE_STATIC
- sd t2,PT_R1(sp)
- jal syscall_trace
- ld t2,PT_R1(sp)
- ld a0, PT_R4(sp) # Restore argument registers
- ld a1, PT_R5(sp)
- ld a2, PT_R6(sp)
- ld a3, PT_R7(sp)
- jalr t2
- li t0, -EMAXERRNO - 1 # error?
- sltu t0, t0, v0
- sd t0, PT_R7(sp) # set error flag
- beqz t0, 1f
- negu v0 # error
- sd v0, PT_R0(sp) # set flag for syscall restarting
- 1: sd v0, PT_R2(sp) # result
- jal syscall_trace
- j ret_from_sys_call
- illegal_syscall:
- /* This also isn't a 64-bit syscall, throw an error. */
- li v0, ENOSYS # error
- sd v0, PT_R2(sp)
- li t0, 1 # set error flag
- sd t0, PT_R7(sp)
- j ret_from_sys_call
- END(handle_sys64)
- sys_call_table:
- PTR sys_syscall /* 5000 */
- PTR sys_exit
- PTR sys_fork
- PTR sys_read
- PTR sys_write
- PTR sys_open /* 5005 */
- PTR sys_close
- PTR sys_waitpid
- PTR sys_creat
- PTR sys_link
- PTR sys_unlink /* 5010 */
- PTR sys_execve
- PTR sys_chdir
- PTR sys_time
- PTR sys_mknod
- PTR sys_chmod /* 5015 */
- PTR sys_lchown
- PTR sys_ni_syscall
- PTR sys_stat
- PTR sys_lseek
- PTR sys_getpid /* 5020 */
- PTR sys_mount
- PTR sys_oldumount
- PTR sys_setuid
- PTR sys_getuid
- PTR sys_stime /* 5025 */
- PTR sys_ni_syscall /* ptrace */
- PTR sys_alarm
- PTR sys_fstat
- PTR sys_pause
- PTR sys_utime /* 5030 */
- PTR sys_ni_syscall
- PTR sys_ni_syscall
- PTR sys_access
- PTR sys_nice
- PTR sys_ni_syscall /* 5035 */
- PTR sys_sync
- PTR sys_kill
- PTR sys_rename
- PTR sys_mkdir
- PTR sys_rmdir /* 5040 */
- PTR sys_dup
- PTR sys_pipe
- PTR sys_times
- PTR sys_ni_syscall
- PTR sys_brk /* 5045 */
- PTR sys_setgid
- PTR sys_getgid
- PTR sys_ni_syscall /* was signal 2 */
- PTR sys_geteuid
- PTR sys_getegid /* 5050 */
- PTR sys_acct
- PTR sys_umount
- PTR sys_ni_syscall
- PTR sys_ioctl
- PTR sys_fcntl /* 5055 */
- PTR sys_ni_syscall
- PTR sys_setpgid
- PTR sys_ni_syscall
- PTR sys_ni_syscall
- PTR sys_umask /* 5060 */
- PTR sys_chroot
- PTR sys_ustat
- PTR sys_dup2
- PTR sys_getppid
- PTR sys_getpgrp /* 5065 */
- PTR sys_setsid
- PTR sys_sigaction
- PTR sys_sgetmask
- PTR sys_ssetmask
- PTR sys_setreuid /* 5070 */
- PTR sys_setregid
- PTR sys_sigsuspend
- PTR sys_sigpending
- PTR sys_sethostname
- PTR sys_setrlimit /* 5075 */
- PTR sys_getrlimit
- PTR sys_getrusage
- PTR sys_gettimeofday
- PTR sys_settimeofday
- PTR sys_getgroups /* 5080 */
- PTR sys_setgroups
- PTR sys_ni_syscall /* old_select */
- PTR sys_symlink
- PTR sys_lstat
- PTR sys_readlink /* 5085 */
- PTR sys_uselib
- PTR sys_swapon
- PTR sys_reboot
- PTR sys_ni_syscall /* old_readdir */
- PTR sys_mmap /* 5090 */
- PTR sys_munmap
- PTR sys_truncate
- PTR sys_ftruncate
- PTR sys_fchmod
- PTR sys_fchown /* 5095 */
- PTR sys_getpriority
- PTR sys_setpriority
- PTR sys_ni_syscall
- PTR sys_statfs
- PTR sys_fstatfs /* 5100 */
- PTR sys_ni_syscall /* sys_ioperm */
- PTR sys_socketcall
- PTR sys_syslog
- PTR sys_setitimer
- PTR sys_getitimer /* 5105 */
- PTR sys_newstat
- PTR sys_newlstat
- PTR sys_newfstat
- PTR sys_ni_syscall
- PTR sys_ni_syscall /* sys_ioperm *//* 5110 */
- PTR sys_vhangup
- PTR sys_ni_syscall /* was sys_idle */
- PTR sys_ni_syscall /* sys_vm86 */
- PTR sys_wait4
- PTR sys_swapoff /* 5115 */
- PTR sys_sysinfo
- PTR sys_ipc
- PTR sys_fsync
- PTR sys_sigreturn
- PTR sys_clone /* 5120 */
- PTR sys_setdomainname
- PTR sys_newuname
- PTR sys_ni_syscall /* sys_modify_ldt */
- PTR sys_adjtimex
- PTR sys_mprotect /* 5125 */
- PTR sys_sigprocmask
- PTR sys_create_module
- PTR sys_init_module
- PTR sys_delete_module
- PTR sys_get_kernel_syms /* 5130 */
- PTR sys_quotactl
- PTR sys_getpgid
- PTR sys_fchdir
- PTR sys_bdflush
- PTR sys_sysfs /* 5135 */
- PTR sys_personality
- PTR sys_ni_syscall /* for afs_syscall */
- PTR sys_setfsuid
- PTR sys_setfsgid
- PTR sys_llseek /* 5140 */
- PTR sys_getdents
- PTR sys_select
- PTR sys_flock
- PTR sys_msync
- PTR sys_readv /* 5145 */
- PTR sys_writev
- PTR sys_cacheflush
- PTR sys_cachectl
- PTR sys_sysmips
- PTR sys_ni_syscall /* 5150 */
- PTR sys_getsid
- PTR sys_fdatasync
- PTR sys_sysctl
- PTR sys_mlock
- PTR sys_munlock /* 5155 */
- PTR sys_mlockall
- PTR sys_munlockall
- PTR sys_sched_setparam
- PTR sys_sched_getparam
- PTR sys_sched_setscheduler /* 5160 */
- PTR sys_sched_getscheduler
- PTR sys_sched_yield
- PTR sys_sched_get_priority_max
- PTR sys_sched_get_priority_min
- PTR sys_sched_rr_get_interval /* 5165 */
- PTR sys_nanosleep
- PTR sys_mremap
- PTR sys_accept
- PTR sys_bind
- PTR sys_connect /* 5170 */
- PTR sys_getpeername
- PTR sys_getsockname
- PTR sys_getsockopt
- PTR sys_listen
- PTR sys_recv /* 5175 */
- PTR sys_recvfrom
- PTR sys_recvmsg
- PTR sys_send
- PTR sys_sendmsg
- PTR sys_sendto /* 5180 */
- PTR sys_setsockopt
- PTR sys_shutdown
- PTR sys_socket
- PTR sys_socketpair
- PTR sys_setresuid /* 5185 */
- PTR sys_getresuid
- PTR sys_query_module
- PTR sys_poll
- PTR sys_nfsservctl
- PTR sys_setresgid /* 5190 */
- PTR sys_getresgid
- PTR sys_prctl
- PTR sys_rt_sigreturn
- PTR sys_rt_sigaction
- PTR sys_rt_sigprocmask /* 5195 */
- PTR sys_rt_sigpending
- PTR sys_rt_sigtimedwait
- PTR sys_rt_sigqueueinfo
- PTR sys_rt_sigsuspend
- PTR sys_pread /* 5200 */
- PTR sys_pwrite
- PTR sys_chown
- PTR sys_getcwd
- PTR sys_capget
- PTR sys_capset /* 5205 */
- PTR sys_sigaltstack
- PTR sys_sendfile
- PTR sys_ni_syscall
- PTR sys_ni_syscall
- PTR sys_pivot_root /* 5210 */
- PTR sys_mincore
- PTR sys_madvise
- PTR sys_getdents64