2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1995 - 2000, 2001 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 * Copyright (C) 2001 MIPS Technologies, Inc.
9 * Copyright (C) 2004 Thiemo Seufer
11 * Hairy, the userspace application uses a different argument passing
12 * convention than the kernel, so we have to translate things from o32
13 * to ABI64 calling convention. 64-bit syscalls are also processed
16 #include <linux/errno.h>
18 #include <asm/asmmacro.h>
19 #include <asm/irqflags.h>
20 #include <asm/mipsregs.h>
21 #include <asm/regdef.h>
22 #include <asm/stackframe.h>
23 #include <asm/thread_info.h>
24 #include <asm/unistd.h>
25 #include <asm/sysmips.h>
28 NESTED(handle_sys, PT_SIZE, sp)
34 ld t1, PT_EPC(sp) # skip syscall on return
36 dsubu t0, v0, __NR_O32_Linux # check syscall number
37 sltiu t0, t0, __NR_O32_Linux_syscalls + 1
38 daddiu t1, 4 # skip to next instruction
40 beqz t0, not_o32_scall
48 /* We don't want to stumble over broken sign extensions from
49 userland. O32 does never use the upper half. */
55 dsll t0, v0, 3 # offset into table
56 ld t2, (sys32_call_table - (__NR_O32_Linux * 8))(t0)
58 sd a3, PT_R26(sp) # save a3 for syscall restarting
61 * More than four arguments. Try to deal with it by copying the
62 * stack arguments from the user stack to the kernel stack.
65 * We intentionally keep the kernel stack a little below the top of
66 * userspace so we don't have to do a slower byte accurate check here.
68 ld t0, PT_R29(sp) # get old user stack pointer
72 1: lw a4, 16(t0) # argument #5 from usp
73 2: lw a5, 20(t0) # argument #6 from usp
74 3: lw a6, 24(t0) # argument #7 from usp
75 4: lw a7, 28(t0) # argument #8 from usp (for indirect syscalls)
77 .section __ex_table,"a"
84 li t1, _TIF_WORK_SYSCALL_ENTRY
85 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
87 bnez t0, trace_a_syscall
89 jalr t2 # Do The Real Thing (TM)
91 li t0, -EMAXERRNO - 1 # error?
93 sd t0, PT_R7(sp) # set error flag
96 ld t1, PT_R2(sp) # syscall number
98 sd t1, PT_R0(sp) # save it for syscall restarting
99 1: sd v0, PT_R2(sp) # result
102 j syscall_exit_partial
104 /* ------------------------------------------------------------------------ */
108 sd a4, PT_R8(sp) # Save argument registers
111 sd a7, PT_R11(sp) # For indirect syscalls
113 move s0, t2 # Save syscall pointer
116 * absolute syscall number is in v0 unless we called syscall(__NR_###)
117 * where the real syscall number is in a0
118 * note: NR_syscall is the first O32 syscall but the macro is
119 * only defined when compiling with -mabi=32 (CONFIG_32BIT)
120 * therefore __NR_O32_Linux is used (4000)
124 subu t1, v0, __NR_O32_Linux
126 bnez t1, 1f /* __NR_syscall at offset 0 */
127 lw a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
130 1: jal syscall_trace_enter
132 bltz v0, 2f # seccomp failed? Skip syscall
136 ld a0, PT_R4(sp) # Restore argument registers
143 ld a7, PT_R11(sp) # For indirect syscalls
146 li t0, -EMAXERRNO - 1 # error?
148 sd t0, PT_R7(sp) # set error flag
151 ld t1, PT_R2(sp) # syscall number
153 sd t1, PT_R0(sp) # save it for syscall restarting
154 1: sd v0, PT_R2(sp) # result
158 /* ------------------------------------------------------------------------ */
161 * The stackpointer for a call with more than 4 arguments is bad.
166 li t0, 1 # set error flag
172 * This is not an o32 compatibility syscall, pass it on
173 * to the 64-bit syscall handlers.
175 #ifdef CONFIG_MIPS32_N32
183 subu t0, a0, __NR_O32_Linux # check syscall number
184 sltiu v0, t0, __NR_O32_Linux_syscalls + 1
185 beqz t0, einval # do not recurse
188 ld t2, sys32_call_table(t1) # syscall routine
189 sd a0, PT_R2(sp) # call routine directly on restart
191 move a0, a1 # shift argument registers
198 sd a0, PT_R4(sp) # ... and push back a0 - a3, some
199 sd a1, PT_R5(sp) # syscalls expect them there
202 sd a3, PT_R26(sp) # update a3 for syscall restarting
206 einval: li v0, -ENOSYS
211 .type sys32_call_table,@object
212 EXPORT(sys32_call_table)
213 PTR sys32_syscall /* 4000 */
218 PTR compat_sys_open /* 4005 */
223 PTR sys_unlink /* 4010 */
224 PTR compat_sys_execve
228 PTR sys_chmod /* 4015 */
231 PTR sys_ni_syscall /* was sys_stat */
233 PTR sys_getpid /* 4020 */
238 PTR compat_sys_stime /* 4025 */
239 PTR compat_sys_ptrace
241 PTR sys_ni_syscall /* was sys_fstat */
243 PTR compat_sys_utime /* 4030 */
248 PTR sys_ni_syscall /* 4035 */
253 PTR sys_rmdir /* 4040 */
258 PTR sys_brk /* 4045 */
261 PTR sys_ni_syscall /* was signal 2 */
263 PTR sys_getegid /* 4050 */
268 PTR compat_sys_fcntl /* 4055 */
273 PTR sys_umask /* 4060 */
278 PTR sys_getpgrp /* 4065 */
283 PTR sys_setreuid /* 4070 */
286 PTR compat_sys_sigpending
288 PTR compat_sys_setrlimit /* 4075 */
289 PTR compat_sys_getrlimit
290 PTR compat_sys_getrusage
291 PTR compat_sys_gettimeofday
292 PTR compat_sys_settimeofday
293 PTR sys_getgroups /* 4080 */
295 PTR sys_ni_syscall /* old_select */
297 PTR sys_ni_syscall /* was sys_lstat */
298 PTR sys_readlink /* 4085 */
302 PTR compat_sys_old_readdir
303 PTR sys_mips_mmap /* 4090 */
305 PTR compat_sys_truncate
306 PTR compat_sys_ftruncate
308 PTR sys_fchown /* 4095 */
312 PTR compat_sys_statfs
313 PTR compat_sys_fstatfs /* 4100 */
314 PTR sys_ni_syscall /* sys_ioperm */
315 PTR compat_sys_socketcall
317 PTR compat_sys_setitimer
318 PTR compat_sys_getitimer /* 4105 */
319 PTR compat_sys_newstat
320 PTR compat_sys_newlstat
321 PTR compat_sys_newfstat
323 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
325 PTR sys_ni_syscall /* was sys_idle */
326 PTR sys_ni_syscall /* sys_vm86 */
328 PTR sys_swapoff /* 4115 */
329 PTR compat_sys_sysinfo
333 PTR __sys_clone /* 4120 */
334 PTR sys_setdomainname
336 PTR sys_ni_syscall /* sys_modify_ldt */
337 PTR compat_sys_adjtimex
338 PTR sys_mprotect /* 4125 */
339 PTR compat_sys_sigprocmask
340 PTR sys_ni_syscall /* was creat_module */
342 PTR sys_delete_module
343 PTR sys_ni_syscall /* 4130, get_kernel_syms */
348 PTR sys_sysfs /* 4135 */
349 PTR sys_32_personality
350 PTR sys_ni_syscall /* for afs_syscall */
353 PTR sys_32_llseek /* 4140 */
354 PTR compat_sys_getdents
355 PTR compat_sys_select
358 PTR compat_sys_readv /* 4145 */
359 PTR compat_sys_writev
363 PTR sys_ni_syscall /* 4150 */
366 PTR compat_sys_sysctl
368 PTR sys_munlock /* 4155 */
371 PTR sys_sched_setparam
372 PTR sys_sched_getparam
373 PTR sys_sched_setscheduler /* 4160 */
374 PTR sys_sched_getscheduler
376 PTR sys_sched_get_priority_max
377 PTR sys_sched_get_priority_min
378 PTR compat_sys_sched_rr_get_interval /* 4165 */
379 PTR compat_sys_nanosleep
383 PTR sys_connect /* 4170 */
388 PTR compat_sys_recv /* 4175 */
389 PTR compat_sys_recvfrom
390 PTR compat_sys_recvmsg
392 PTR compat_sys_sendmsg
393 PTR sys_sendto /* 4180 */
394 PTR compat_sys_setsockopt
398 PTR sys_setresuid /* 4185 */
400 PTR sys_ni_syscall /* was query_module */
402 PTR sys_ni_syscall /* was nfsservctl */
403 PTR sys_setresgid /* 4190 */
406 PTR sys32_rt_sigreturn
407 PTR compat_sys_rt_sigaction
408 PTR compat_sys_rt_sigprocmask /* 4195 */
409 PTR compat_sys_rt_sigpending
410 PTR compat_sys_rt_sigtimedwait
411 PTR compat_sys_rt_sigqueueinfo
412 PTR compat_sys_rt_sigsuspend
413 PTR sys_32_pread /* 4200 */
418 PTR sys_capset /* 4205 */
419 PTR compat_sys_sigaltstack
420 PTR compat_sys_sendfile
423 PTR sys_mips_mmap2 /* 4210 */
424 PTR sys_32_truncate64
425 PTR sys_32_ftruncate64
428 PTR sys_newfstat /* 4215 */
433 PTR compat_sys_fcntl64 /* 4220 */
438 PTR sys_lsetxattr /* 4225 */
443 PTR sys_listxattr /* 4230 */
448 PTR sys_fremovexattr /* 4235 */
452 PTR compat_sys_sched_setaffinity
453 PTR compat_sys_sched_getaffinity /* 4240 */
454 PTR compat_sys_io_setup
456 PTR compat_sys_io_getevents
457 PTR compat_sys_io_submit
458 PTR sys_io_cancel /* 4245 */
460 PTR compat_sys_lookup_dcookie
463 PTR sys_epoll_wait /* 4250 */
464 PTR sys_remap_file_pages
465 PTR sys_set_tid_address
466 PTR sys_restart_syscall
467 PTR sys32_fadvise64_64
468 PTR compat_sys_statfs64 /* 4255 */
469 PTR compat_sys_fstatfs64
470 PTR compat_sys_timer_create
471 PTR compat_sys_timer_settime
472 PTR compat_sys_timer_gettime
473 PTR sys_timer_getoverrun /* 4260 */
475 PTR compat_sys_clock_settime
476 PTR compat_sys_clock_gettime
477 PTR compat_sys_clock_getres
478 PTR compat_sys_clock_nanosleep /* 4265 */
480 PTR compat_sys_utimes
482 PTR compat_sys_get_mempolicy
483 PTR compat_sys_set_mempolicy /* 4270 */
484 PTR compat_sys_mq_open
486 PTR compat_sys_mq_timedsend
487 PTR compat_sys_mq_timedreceive
488 PTR compat_sys_mq_notify /* 4275 */
489 PTR compat_sys_mq_getsetattr
490 PTR sys_ni_syscall /* sys_vserver */
491 PTR compat_sys_waitid
492 PTR sys_ni_syscall /* available, was setaltroot */
493 PTR sys_add_key /* 4280 */
496 PTR sys_set_thread_area
498 PTR sys_inotify_add_watch /* 4285 */
499 PTR sys_inotify_rm_watch
500 PTR compat_sys_migrate_pages
501 PTR compat_sys_openat
503 PTR sys_mknodat /* 4290 */
505 PTR compat_sys_futimesat
508 PTR sys_renameat /* 4295 */
513 PTR sys_faccessat /* 4300 */
514 PTR compat_sys_pselect6
518 PTR sys32_sync_file_range /* 4305 */
520 PTR compat_sys_vmsplice
521 PTR compat_sys_move_pages
522 PTR compat_sys_set_robust_list
523 PTR compat_sys_get_robust_list /* 4310 */
524 PTR compat_sys_kexec_load
526 PTR compat_sys_epoll_pwait
528 PTR sys_ioprio_get /* 4315 */
529 PTR compat_sys_utimensat
530 PTR compat_sys_signalfd
531 PTR sys_ni_syscall /* was timerfd */
533 PTR sys32_fallocate /* 4320 */
534 PTR sys_timerfd_create
535 PTR compat_sys_timerfd_gettime
536 PTR compat_sys_timerfd_settime
537 PTR compat_sys_signalfd4
538 PTR sys_eventfd2 /* 4325 */
539 PTR sys_epoll_create1
542 PTR sys_inotify_init1
543 PTR compat_sys_preadv /* 4330 */
544 PTR compat_sys_pwritev
545 PTR compat_sys_rt_tgsigqueueinfo
546 PTR sys_perf_event_open
548 PTR compat_sys_recvmmsg /* 4335 */
549 PTR sys_fanotify_init
550 PTR compat_sys_fanotify_mark
552 PTR sys_name_to_handle_at
553 PTR compat_sys_open_by_handle_at /* 4340 */
554 PTR compat_sys_clock_adjtime
556 PTR compat_sys_sendmmsg
558 PTR compat_sys_process_vm_readv /* 4345 */
559 PTR compat_sys_process_vm_writev
562 PTR sys_sched_setattr
563 PTR sys_sched_getattr /* 4350 */
568 PTR sys_bpf /* 4355 */
569 PTR compat_sys_execveat
570 .size sys32_call_table,.-sys32_call_table