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/*
* 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
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