/*
* 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 - 2000, 2001 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
* Copyright (C) 2004 Thiemo Seufer
*
* Hairy, the userspace application uses a different argument passing
* convention than the kernel, so we have to translate things from o32
* to ABI64 calling convention. 64-bit syscalls are also processed
* here for now.
*/
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/thread_info.h>
#include <asm/unistd.h>
#include <asm/sysmips.h>
.align 5
NESTED(handle_sys, PT_SIZE, sp)
.set noat
SAVE_SOME
TRACE_IRQS_ON_RELOAD
STI
.set at
ld t1, PT_EPC(sp) # skip syscall on return
dsubu t0, v0, __NR_O32_Linux # check syscall number
sltiu t0, t0, __NR_O32_Linux_syscalls + 1
daddiu t1, 4 # skip to next instruction
sd t1, PT_EPC(sp)
beqz t0, not_o32_scall
#if 0
SAVE_ALL
move a1, v0
PRINT("Scall %ld\n")
RESTORE_ALL
#endif
/* We don't want to stumble over broken sign extensions from
userland. O32 does never use the upper half. */
sll a0, a0, 0
sll a1, a1, 0
sll a2, a2, 0
sll a3, a3, 0
dsll t0, v0, 3 # offset into table
ld t2, (sys32_call_table - (__NR_O32_Linux * 8))(t0)
sd a3, PT_R26(sp) # save a3 for syscall restarting
/*
* More than four arguments. Try to deal with it by copying the
* stack arguments from the user stack to the kernel stack.
* This Sucks (TM).
*
* We intentionally keep the kernel stack a little below the top of
* userspace so we don't have to do a slower byte accurate check here.
*/
ld t0, PT_R29(sp) # get old user stack pointer
daddu t1, t0, 32
bltz t1, bad_stack
load_a4: lw a4, 16(t0) # argument #5 from usp
load_a5: lw a5, 20(t0) # argument #6 from usp
load_a6: lw a6, 24(t0) # argument #7 from usp
load_a7: lw a7, 28(t0) # argument #8 from usp
loads_done:
.section __ex_table,"a"
PTR load_a4, bad_stack_a4
PTR load_a5, bad_stack_a5
PTR load_a6, bad_stack_a6
PTR load_a7, bad_stack_a7
.previous
li t1, _TIF_WORK_SYSCALL_ENTRY
LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
and t0, t1, t0
bnez t0, trace_a_syscall
syscall_common:
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
ld t1, PT_R2(sp) # syscall number
dnegu v0 # error
sd t1, PT_R0(sp) # save it for syscall restarting
1: sd v0, PT_R2(sp) # result
o32_syscall_exit:
j syscall_exit_partial
/* ------------------------------------------------------------------------ */
trace_a_syscall:
SAVE_STATIC
sd a4, PT_R8(sp) # Save argument registers
sd a5, PT_R9(sp)
sd a6, PT_R10(sp)
sd a7, PT_R11(sp) # For indirect syscalls
move s0, t2 # Save syscall pointer
move a0, sp
/*
* absolute syscall number is in v0 unless we called syscall(__NR_###)
* where the real syscall number is in a0
* note: NR_syscall is the first O32 syscall but the macro is
* only defined when compiling with -mabi=32 (CONFIG_32BIT)
* therefore __NR_O32_Linux is used (4000)
*/
.set push
.set reorder
subu t1, v0, __NR_O32_Linux
move a1, v0
bnez t1, 1f /* __NR_syscall at offset 0 */
lw a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
.set pop
1: jal syscall_trace_enter
bltz v0, 1f # seccomp failed? Skip syscall
move t2, s0
RESTORE_STATIC
ld a0, PT_R4(sp) # Restore argument registers
ld a1, PT_R5(sp)
ld a2, PT_R6(sp)
ld a3, PT_R7(sp)
ld a4, PT_R8(sp)
ld a5, PT_R9(sp)
ld a6, PT_R10(sp)
ld a7, PT_R11(sp) # For indirect syscalls
j syscall_common
1: j syscall_exit
/* ------------------------------------------------------------------------ */
/*
* The stackpointer for a call with more than 4 arguments is bad.
*/
bad_stack:
li v0, EFAULT
sd v0, PT_R2(sp)
li t0, 1 # set error flag
sd t0, PT_R7(sp)
j o32_syscall_exit
bad_stack_a4:
li a4, 0
b load_a5
bad_stack_a5:
li a5, 0
b load_a6
bad_stack_a6:
li a6, 0
b load_a7
bad_stack_a7:
li a7, 0
b loads_done
not_o32_scall:
/*
* This is not an o32 compatibility syscall, pass it on
* to the 64-bit syscall handlers.
*/
#ifdef CONFIG_MIPS32_N32
j handle_sysn32
#else
j handle_sys64
#endif
END(handle_sys)
LEAF(sys32_syscall)
subu t0, a0, __NR_O32_Linux # check syscall number
sltiu v0, t0, __NR_O32_Linux_syscalls + 1
beqz t0, einval # do not recurse
dsll t1, t0, 3
beqz v0, einval
ld t2, sys32_call_table(t1) # syscall routine
sd a0, PT_R2(sp) # call routine directly on restart
move a0, a1 # shift argument registers
move a1, a2
move a2, a3
move a3, a4
move a4, a5
move a5, a6
move a6, a7
sd a0, PT_R4(sp) # ... and push back a0 - a3, some
sd a1, PT_R5(sp) # syscalls expect them there
sd a2, PT_R6(sp)
sd a3, PT_R7(sp)
sd a3, PT_R26(sp) # update a3 for syscall restarting
jr t2
/* Unreached */
einval: li v0, -ENOSYS
jr ra
END(sys32_syscall)
.align 3
.type sys32_call_table,@object
EXPORT(sys32_call_table)
PTR sys32_syscall /* 4000 */
PTR sys_exit
PTR __sys_fork
PTR sys_read
PTR sys_write
PTR compat_sys_open /* 4005 */
PTR sys_close
PTR sys_waitpid
PTR sys_creat
PTR sys_link
PTR sys_unlink /* 4010 */
PTR compat_sys_execve
PTR sys_chdir
PTR compat_sys_time
PTR sys_mknod
PTR sys_chmod /* 4015 */
PTR sys_lchown
PTR sys_ni_syscall
PTR sys_ni_syscall /* was sys_stat */
PTR sys_lseek
PTR sys_getpid /* 4020 */
PTR compat_sys_mount
PTR sys_oldumount
PTR sys_setuid
PTR sys_getuid
PTR compat_sys_stime /* 4025 */
PTR compat_sys_ptrace
PTR sys_alarm
PTR sys_ni_syscall /* was sys_fstat */
PTR sys_pause
PTR compat_sys_utime /* 4030 */
PTR sys_ni_syscall
PTR sys_ni_syscall
PTR sys_access
PTR sys_nice
PTR sys_ni_syscall /* 4035 */
PTR sys_sync
PTR sys_kill
PTR sys_rename
PTR sys_mkdir
PTR sys_rmdir /* 4040 */
PTR sys_dup
PTR sysm_pipe
PTR compat_sys_times
PTR sys_ni_syscall
PTR sys_brk /* 4045 */
PTR sys_setgid
PTR sys_getgid
PTR sys_ni_syscall /* was signal 2 */
PTR sys_geteuid
PTR sys_getegid /* 4050 */
PTR sys_acct
PTR sys_umount
PTR sys_ni_syscall
PTR compat_sys_ioctl
PTR compat_sys_fcntl /* 4055 */
PTR sys_ni_syscall
PTR sys_setpgid
PTR sys_ni_syscall
PTR sys_olduname
PTR sys_umask /* 4060 */
PTR sys_chroot
PTR compat_sys_ustat
PTR sys_dup2
PTR sys_getppid
PTR sys_getpgrp /* 4065 */
PTR sys_setsid
PTR sys_32_sigaction
PTR sys_sgetmask
PTR sys_ssetmask
PTR sys_setreuid /* 4070 */
PTR sys_setregid
PTR sys32_sigsuspend
PTR compat_sys_sigpending
PTR sys_sethostname
PTR compat_sys_setrlimit /* 4075 */
PTR compat_sys_getrlimit
PTR compat_sys_getrusage
PTR compat_sys_gettimeofday
PTR compat_sys_settimeofday
PTR sys_getgroups /* 4080 */
PTR sys_setgroups
PTR sys_ni_syscall /* old_select */
PTR sys_symlink
PTR sys_ni_syscall /* was sys_lstat */
PTR sys_readlink /* 4085 */
PTR sys_uselib
PTR sys_swapon
PTR sys_reboot
PTR compat_sys_old_readdir
PTR sys_mips_mmap /* 4090 */
PTR sys_munmap
PTR compat_sys_truncate
PTR compat_sys_ftruncate
PTR sys_fchmod
PTR sys_fchown /* 4095 */
PTR sys_getpriority
PTR sys_setpriority
PTR sys_ni_syscall
PTR compat_sys_statfs
PTR compat_sys_fstatfs /* 4100 */
PTR sys_ni_syscall /* sys_ioperm */
PTR compat_sys_socketcall
PTR sys_syslog
PTR compat_sys_setitimer
PTR compat_sys_getitimer /* 4105 */
PTR compat_sys_newstat
PTR compat_sys_newlstat
PTR compat_sys_newfstat
PTR sys_uname
PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
PTR sys_vhangup
PTR sys_ni_syscall /* was sys_idle */
PTR sys_ni_syscall /* sys_vm86 */
PTR compat_sys_wait4
PTR sys_swapoff /* 4115 */
PTR compat_sys_sysinfo
PTR compat_sys_ipc
PTR sys_fsync
PTR sys32_sigreturn
PTR __sys_clone /* 4120 */
PTR sys_setdomainname
PTR sys_newuname
PTR sys_ni_syscall /* sys_modify_ldt */
PTR compat_sys_adjtimex
PTR sys_mprotect /* 4125 */
PTR compat_sys_sigprocmask
PTR sys_ni_syscall /* was creat_module */
PTR sys_init_module
PTR sys_delete_module
PTR sys_ni_syscall /* 4130, get_kernel_syms */
PTR sys_quotactl
PTR sys_getpgid
PTR sys_fchdir
PTR sys_bdflush
PTR sys_sysfs /* 4135 */
PTR sys_32_personality
PTR sys_ni_syscall /* for afs_syscall */
PTR sys_setfsuid
PTR sys_setfsgid
PTR sys_32_llseek /* 4140 */
PTR compat_sys_getdents
PTR compat_sys_select
PTR sys_flock
PTR sys_msync
PTR compat_sys_readv /* 4145 */
PTR compat_sys_writev
PTR sys_cacheflush
PTR sys_cachectl
PTR sys_sysmips
PTR sys_ni_syscall /* 4150 */
PTR sys_getsid
PTR sys_fdatasync
PTR compat_sys_sysctl
PTR sys_mlock
PTR sys_munlock /* 4155 */
PTR sys_mlockall
PTR sys_munlockall
PTR sys_sched_setparam
PTR sys_sched_getparam
PTR sys_sched_setscheduler /* 4160 */
PTR sys_sched_getscheduler
PTR sys_sched_yield
PTR sys_sched_get_priority_max
PTR sys_sched_get_priority_min
PTR compat_sys_sched_rr_get_interval /* 4165 */
PTR compat_sys_nanosleep
PTR sys_mremap
PTR sys_accept
PTR sys_bind
PTR sys_connect /* 4170 */
PTR sys_getpeername
PTR sys_getsockname
PTR compat_sys_getsockopt
PTR sys_listen
PTR compat_sys_recv /* 4175 */
PTR compat_sys_recvfrom
PTR compat_sys_recvmsg
PTR sys_send
PTR compat_sys_sendmsg
PTR sys_sendto /* 4180 */
PTR compat_sys_setsockopt
PTR sys_shutdown
PTR sys_socket
PTR sys_socketpair
PTR sys_setresuid /* 4185 */
PTR sys_getresuid
PTR sys_ni_syscall /* was query_module */
PTR sys_poll
PTR sys_ni_syscall /* was nfsservctl */
PTR sys_setresgid /* 4190 */
PTR sys_getresgid
PTR sys_prctl
PTR sys32_rt_sigreturn
PTR compat_sys_rt_sigaction
PTR compat_sys_rt_sigprocmask /* 4195 */
PTR compat_sys_rt_sigpending
PTR compat_sys_rt_sigtimedwait
PTR compat_sys_rt_sigqueueinfo
PTR compat_sys_rt_sigsuspend
PTR sys_32_pread /* 4200 */
PTR sys_32_pwrite
PTR sys_chown
PTR sys_getcwd
PTR sys_capget
PTR sys_capset /* 4205 */
PTR compat_sys_sigaltstack
PTR compat_sys_sendfile
PTR sys_ni_syscall
PTR sys_ni_syscall
PTR sys_mips_mmap2 /* 4210 */
PTR sys_32_truncate64
PTR sys_32_ftruncate64
PTR sys_newstat
PTR sys_newlstat
PTR sys_newfstat /* 4215 */
PTR sys_pivot_root
PTR sys_mincore
PTR sys_madvise
PTR sys_getdents64
PTR compat_sys_fcntl64 /* 4220 */
PTR sys_ni_syscall
PTR sys_gettid
PTR sys32_readahead
PTR sys_setxattr
PTR sys_lsetxattr /* 4225 */
PTR sys_fsetxattr
PTR sys_getxattr
PTR sys_lgetxattr
PTR sys_fgetxattr
PTR sys_listxattr /* 4230 */
PTR sys_llistxattr
PTR sys_flistxattr
PTR sys_removexattr
PTR sys_lremovexattr
PTR sys_fremovexattr /* 4235 */
PTR sys_tkill
PTR sys_sendfile64
PTR compat_sys_futex
PTR compat_sys_sched_setaffinity
PTR compat_sys_sched_getaffinity /* 4240 */
PTR compat_sys_io_setup
PTR sys_io_destroy
PTR compat_sys_io_getevents
PTR compat_sys_io_submit
PTR sys_io_cancel /* 4245 */
PTR sys_exit_group
PTR compat_sys_lookup_dcookie
PTR sys_epoll_create
PTR sys_epoll_ctl
PTR sys_epoll_wait /* 4250 */
PTR sys_remap_file_pages
PTR sys_set_tid_address
PTR sys_restart_syscall
PTR sys32_fadvise64_64
PTR compat_sys_statfs64 /* 4255 */
PTR compat_sys_fstatfs64
PTR compat_sys_timer_create
PTR compat_sys_timer_settime
PTR compat_sys_timer_gettime
PTR sys_timer_getoverrun /* 4260 */
PTR sys_timer_delete
PTR compat_sys_clock_settime
PTR compat_sys_clock_gettime
PTR compat_sys_clock_getres
PTR compat_sys_clock_nanosleep /* 4265 */
PTR sys_tgkill
PTR compat_sys_utimes
PTR compat_sys_mbind
PTR compat_sys_get_mempolicy
PTR compat_sys_set_mempolicy /* 4270 */
PTR compat_sys_mq_open
PTR sys_mq_unlink
PTR compat_sys_mq_timedsend
PTR compat_sys_mq_timedreceive
PTR compat_sys_mq_notify /* 4275 */
PTR compat_sys_mq_getsetattr
PTR sys_ni_syscall /* sys_vserver */
PTR compat_sys_waitid
PTR sys_ni_syscall /* available, was setaltroot */
PTR sys_add_key /* 4280 */
PTR sys_request_key
PTR sys_keyctl
PTR sys_set_thread_area
PTR sys_inotify_init
PTR sys_inotify_add_watch /* 4285 */
PTR sys_inotify_rm_watch
PTR compat_sys_migrate_pages
PTR compat_sys_openat
PTR sys_mkdirat
PTR sys_mknodat /* 4290 */
PTR sys_fchownat
PTR compat_sys_futimesat
PTR sys_newfstatat
PTR sys_unlinkat
PTR sys_renameat /* 4295 */
PTR sys_linkat
PTR sys_symlinkat
PTR sys_readlinkat
PTR sys_fchmodat
PTR sys_faccessat /* 4300 */
PTR compat_sys_pselect6
PTR compat_sys_ppoll
PTR sys_unshare
PTR sys_splice
PTR sys32_sync_file_range /* 4305 */
PTR sys_tee
PTR compat_sys_vmsplice
PTR compat_sys_move_pages
PTR compat_sys_set_robust_list
PTR compat_sys_get_robust_list /* 4310 */
PTR compat_sys_kexec_load
PTR sys_getcpu
PTR compat_sys_epoll_pwait
PTR sys_ioprio_set
PTR sys_ioprio_get /* 4315 */
PTR compat_sys_utimensat
PTR compat_sys_signalfd
PTR sys_ni_syscall /* was timerfd */
PTR sys_eventfd
PTR sys32_fallocate /* 4320 */
PTR sys_timerfd_create
PTR compat_sys_timerfd_gettime
PTR compat_sys_timerfd_settime
PTR compat_sys_signalfd4
PTR sys_eventfd2 /* 4325 */
PTR sys_epoll_create1
PTR sys_dup3
PTR sys_pipe2
PTR sys_inotify_init1
PTR compat_sys_preadv /* 4330 */
PTR compat_sys_pwritev
PTR compat_sys_rt_tgsigqueueinfo
PTR sys_perf_event_open
PTR sys_accept4
PTR compat_sys_recvmmsg /* 4335 */
PTR sys_fanotify_init
PTR compat_sys_fanotify_mark
PTR sys_prlimit64
PTR sys_name_to_handle_at
PTR compat_sys_open_by_handle_at /* 4340 */
PTR compat_sys_clock_adjtime
PTR sys_syncfs
PTR compat_sys_sendmmsg
PTR sys_setns
PTR compat_sys_process_vm_readv /* 4345 */
PTR compat_sys_process_vm_writev
PTR sys_kcmp
PTR sys_finit_module
PTR sys_sched_setattr
PTR sys_sched_getattr /* 4350 */
PTR sys_renameat2
PTR sys_seccomp
PTR sys_getrandom
PTR sys_memfd_create
PTR sys_bpf /* 4355 */
PTR compat_sys_execveat
PTR sys_userfaultfd
PTR sys_membarrier
PTR sys_mlock2
.size sys32_call_table,.-sys32_call_table