| blob | 6efa7136748f6d72f1f5ea47e43e28eae87e59ea |
1 /*
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
4 * for more details.
5 *
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
10 *
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
14 * here for now.
15 */
16 #include <linux/errno.h>
17 #include <asm/asm.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>
27 .align 5
28 NESTED(handle_sys, PT_SIZE, sp)
29 .set noat
30 SAVE_SOME
31 TRACE_IRQS_ON_RELOAD
32 STI
33 .set at
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
39 sd t1, PT_EPC(sp)
40 beqz t0, not_o32_scall
41 #if 0
42 SAVE_ALL
43 move a1, v0
44 PRINT("Scall %ld\n")
45 RESTORE_ALL
46 #endif
48 /* We don't want to stumble over broken sign extensions from
49 userland. O32 does never use the upper half. */
50 sll a0, a0, 0
51 sll a1, a1, 0
52 sll a2, a2, 0
53 sll a3, a3, 0
55 sd a3, PT_R26(sp) # save a3 for syscall restarting
57 /*
58 * More than four arguments. Try to deal with it by copying the
59 * stack arguments from the user stack to the kernel stack.
60 * This Sucks (TM).
61 *
62 * We intentionally keep the kernel stack a little below the top of
63 * userspace so we don't have to do a slower byte accurate check here.
64 */
65 ld t0, PT_R29(sp) # get old user stack pointer
66 daddu t1, t0, 32
67 bltz t1, bad_stack
69 load_a4: lw a4, 16(t0) # argument #5 from usp
70 load_a5: lw a5, 20(t0) # argument #6 from usp
71 load_a6: lw a6, 24(t0) # argument #7 from usp
72 load_a7: lw a7, 28(t0) # argument #8 from usp
73 loads_done:
75 .section __ex_table,"a"
76 PTR load_a4, bad_stack_a4
77 PTR load_a5, bad_stack_a5
78 PTR load_a6, bad_stack_a6
79 PTR load_a7, bad_stack_a7
80 .previous
82 li t1, _TIF_WORK_SYSCALL_ENTRY
83 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
84 and t0, t1, t0
85 bnez t0, trace_a_syscall
87 syscall_common:
88 dsll t0, v0, 3 # offset into table
89 ld t2, (sys32_call_table - (__NR_O32_Linux * 8))(t0)
91 jalr t2 # Do The Real Thing (TM)
93 li t0, -EMAXERRNO - 1 # error?
94 sltu t0, t0, v0
95 sd t0, PT_R7(sp) # set error flag
96 beqz t0, 1f
98 ld t1, PT_R2(sp) # syscall number
99 dnegu v0 # error
100 sd t1, PT_R0(sp) # save it for syscall restarting
101 1: sd v0, PT_R2(sp) # result
103 o32_syscall_exit:
104 j syscall_exit_partial
106 /* ------------------------------------------------------------------------ */
108 trace_a_syscall:
109 SAVE_STATIC
110 sd a4, PT_R8(sp) # Save argument registers
111 sd a5, PT_R9(sp)
112 sd a6, PT_R10(sp)
113 sd a7, PT_R11(sp) # For indirect syscalls
115 move a0, sp
116 /*
117 * absolute syscall number is in v0 unless we called syscall(__NR_###)
118 * where the real syscall number is in a0
119 * note: NR_syscall is the first O32 syscall but the macro is
120 * only defined when compiling with -mabi=32 (CONFIG_32BIT)
121 * therefore __NR_O32_Linux is used (4000)
122 */
123 .set push
124 .set reorder
125 subu t1, v0, __NR_O32_Linux
126 move a1, v0
127 bnez t1, 1f /* __NR_syscall at offset 0 */
128 lw a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
129 .set pop
131 1: jal syscall_trace_enter
133 bltz v0, 1f # seccomp failed? Skip syscall
135 RESTORE_STATIC
136 ld v0, PT_R2(sp) # Restore syscall (maybe modified)
137 ld a0, PT_R4(sp) # Restore argument registers
138 ld a1, PT_R5(sp)
139 ld a2, PT_R6(sp)
140 ld a3, PT_R7(sp)
141 ld a4, PT_R8(sp)
142 ld a5, PT_R9(sp)
143 ld a6, PT_R10(sp)
144 ld a7, PT_R11(sp) # For indirect syscalls
146 dsubu t0, v0, __NR_O32_Linux # check (new) syscall number
147 sltiu t0, t0, __NR_O32_Linux_syscalls + 1
148 beqz t0, not_o32_scall
150 j syscall_common
152 1: j syscall_exit
154 /* ------------------------------------------------------------------------ */
156 /*
157 * The stackpointer for a call with more than 4 arguments is bad.
158 */
159 bad_stack:
160 li v0, EFAULT
161 sd v0, PT_R2(sp)
162 li t0, 1 # set error flag
163 sd t0, PT_R7(sp)
164 j o32_syscall_exit
166 bad_stack_a4:
167 li a4, 0
168 b load_a5
170 bad_stack_a5:
171 li a5, 0
172 b load_a6
174 bad_stack_a6:
175 li a6, 0
176 b load_a7
178 bad_stack_a7:
179 li a7, 0
180 b loads_done
182 not_o32_scall:
183 /*
184 * This is not an o32 compatibility syscall, pass it on
185 * to the 64-bit syscall handlers.
186 */
187 #ifdef CONFIG_MIPS32_N32
188 j handle_sysn32
189 #else
190 j handle_sys64
191 #endif
192 END(handle_sys)
194 LEAF(sys32_syscall)
195 subu t0, a0, __NR_O32_Linux # check syscall number
196 sltiu v0, t0, __NR_O32_Linux_syscalls + 1
197 beqz t0, einval # do not recurse
198 dsll t1, t0, 3
199 beqz v0, einval
200 ld t2, sys32_call_table(t1) # syscall routine
201 sd a0, PT_R2(sp) # call routine directly on restart
203 move a0, a1 # shift argument registers
204 move a1, a2
205 move a2, a3
206 move a3, a4
207 move a4, a5
208 move a5, a6
209 move a6, a7
210 sd a0, PT_R4(sp) # ... and push back a0 - a3, some
211 sd a1, PT_R5(sp) # syscalls expect them there
212 sd a2, PT_R6(sp)
213 sd a3, PT_R7(sp)
214 sd a3, PT_R26(sp) # update a3 for syscall restarting
215 jr t2
216 /* Unreached */
218 einval: li v0, -ENOSYS
219 jr ra
220 END(sys32_syscall)
222 .align 3
223 .type sys32_call_table,@object
224 EXPORT(sys32_call_table)
225 PTR sys32_syscall /* 4000 */
226 PTR sys_exit
227 PTR __sys_fork
228 PTR sys_read
229 PTR sys_write
230 PTR compat_sys_open /* 4005 */
231 PTR sys_close
232 PTR sys_waitpid
233 PTR sys_creat
234 PTR sys_link
235 PTR sys_unlink /* 4010 */
236 PTR compat_sys_execve
237 PTR sys_chdir
238 PTR compat_sys_time
239 PTR sys_mknod
240 PTR sys_chmod /* 4015 */
241 PTR sys_lchown
242 PTR sys_ni_syscall
243 PTR sys_ni_syscall /* was sys_stat */
244 PTR sys_lseek
245 PTR sys_getpid /* 4020 */
246 PTR compat_sys_mount
247 PTR sys_oldumount
248 PTR sys_setuid
249 PTR sys_getuid
250 PTR compat_sys_stime /* 4025 */
251 PTR compat_sys_ptrace
252 PTR sys_alarm
253 PTR sys_ni_syscall /* was sys_fstat */
254 PTR sys_pause
255 PTR compat_sys_utime /* 4030 */
256 PTR sys_ni_syscall
257 PTR sys_ni_syscall
258 PTR sys_access
259 PTR sys_nice
260 PTR sys_ni_syscall /* 4035 */
261 PTR sys_sync
262 PTR sys_kill
263 PTR sys_rename
264 PTR sys_mkdir
265 PTR sys_rmdir /* 4040 */
266 PTR sys_dup
267 PTR sysm_pipe
268 PTR compat_sys_times
269 PTR sys_ni_syscall
270 PTR sys_brk /* 4045 */
271 PTR sys_setgid
272 PTR sys_getgid
273 PTR sys_ni_syscall /* was signal 2 */
274 PTR sys_geteuid
275 PTR sys_getegid /* 4050 */
276 PTR sys_acct
277 PTR sys_umount
278 PTR sys_ni_syscall
279 PTR compat_sys_ioctl
280 PTR compat_sys_fcntl /* 4055 */
281 PTR sys_ni_syscall
282 PTR sys_setpgid
283 PTR sys_ni_syscall
284 PTR sys_olduname
285 PTR sys_umask /* 4060 */
286 PTR sys_chroot
287 PTR compat_sys_ustat
288 PTR sys_dup2
289 PTR sys_getppid
290 PTR sys_getpgrp /* 4065 */
291 PTR sys_setsid
292 PTR sys_32_sigaction
293 PTR sys_sgetmask
294 PTR sys_ssetmask
295 PTR sys_setreuid /* 4070 */
296 PTR sys_setregid
297 PTR sys32_sigsuspend
298 PTR compat_sys_sigpending
299 PTR sys_sethostname
300 PTR compat_sys_setrlimit /* 4075 */
301 PTR compat_sys_getrlimit
302 PTR compat_sys_getrusage
303 PTR compat_sys_gettimeofday
304 PTR compat_sys_settimeofday
305 PTR sys_getgroups /* 4080 */
306 PTR sys_setgroups
307 PTR sys_ni_syscall /* old_select */
308 PTR sys_symlink
309 PTR sys_ni_syscall /* was sys_lstat */
310 PTR sys_readlink /* 4085 */
311 PTR sys_uselib
312 PTR sys_swapon
313 PTR sys_reboot
314 PTR compat_sys_old_readdir
315 PTR sys_mips_mmap /* 4090 */
316 PTR sys_munmap
317 PTR compat_sys_truncate
318 PTR compat_sys_ftruncate
319 PTR sys_fchmod
320 PTR sys_fchown /* 4095 */
321 PTR sys_getpriority
322 PTR sys_setpriority
323 PTR sys_ni_syscall
324 PTR compat_sys_statfs
325 PTR compat_sys_fstatfs /* 4100 */
326 PTR sys_ni_syscall /* sys_ioperm */
327 PTR compat_sys_socketcall
328 PTR sys_syslog
329 PTR compat_sys_setitimer
330 PTR compat_sys_getitimer /* 4105 */
331 PTR compat_sys_newstat
332 PTR compat_sys_newlstat
333 PTR compat_sys_newfstat
334 PTR sys_uname
335 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
336 PTR sys_vhangup
337 PTR sys_ni_syscall /* was sys_idle */
338 PTR sys_ni_syscall /* sys_vm86 */
339 PTR compat_sys_wait4
340 PTR sys_swapoff /* 4115 */
341 PTR compat_sys_sysinfo
342 PTR compat_sys_ipc
343 PTR sys_fsync
344 PTR sys32_sigreturn
345 PTR __sys_clone /* 4120 */
346 PTR sys_setdomainname
347 PTR sys_newuname
348 PTR sys_ni_syscall /* sys_modify_ldt */
349 PTR compat_sys_adjtimex
350 PTR sys_mprotect /* 4125 */
351 PTR compat_sys_sigprocmask
352 PTR sys_ni_syscall /* was creat_module */
353 PTR sys_init_module
354 PTR sys_delete_module
355 PTR sys_ni_syscall /* 4130, get_kernel_syms */
356 PTR sys_quotactl
357 PTR sys_getpgid
358 PTR sys_fchdir
359 PTR sys_bdflush
360 PTR sys_sysfs /* 4135 */
361 PTR sys_32_personality
362 PTR sys_ni_syscall /* for afs_syscall */
363 PTR sys_setfsuid
364 PTR sys_setfsgid
365 PTR sys_32_llseek /* 4140 */
366 PTR compat_sys_getdents
367 PTR compat_sys_select
368 PTR sys_flock
369 PTR sys_msync
370 PTR compat_sys_readv /* 4145 */
371 PTR compat_sys_writev
372 PTR sys_cacheflush
373 PTR sys_cachectl
374 PTR sys_sysmips
375 PTR sys_ni_syscall /* 4150 */
376 PTR sys_getsid
377 PTR sys_fdatasync
378 PTR compat_sys_sysctl
379 PTR sys_mlock
380 PTR sys_munlock /* 4155 */
381 PTR sys_mlockall
382 PTR sys_munlockall
383 PTR sys_sched_setparam
384 PTR sys_sched_getparam
385 PTR sys_sched_setscheduler /* 4160 */
386 PTR sys_sched_getscheduler
387 PTR sys_sched_yield
388 PTR sys_sched_get_priority_max
389 PTR sys_sched_get_priority_min
390 PTR compat_sys_sched_rr_get_interval /* 4165 */
391 PTR compat_sys_nanosleep
392 PTR sys_mremap
393 PTR sys_accept
394 PTR sys_bind
395 PTR sys_connect /* 4170 */
396 PTR sys_getpeername
397 PTR sys_getsockname
398 PTR compat_sys_getsockopt
399 PTR sys_listen
400 PTR compat_sys_recv /* 4175 */
401 PTR compat_sys_recvfrom
402 PTR compat_sys_recvmsg
403 PTR sys_send
404 PTR compat_sys_sendmsg
405 PTR sys_sendto /* 4180 */
406 PTR compat_sys_setsockopt
407 PTR sys_shutdown
408 PTR sys_socket
409 PTR sys_socketpair
410 PTR sys_setresuid /* 4185 */
411 PTR sys_getresuid
412 PTR sys_ni_syscall /* was query_module */
413 PTR sys_poll
414 PTR sys_ni_syscall /* was nfsservctl */
415 PTR sys_setresgid /* 4190 */
416 PTR sys_getresgid
417 PTR sys_prctl
418 PTR sys32_rt_sigreturn
419 PTR compat_sys_rt_sigaction
420 PTR compat_sys_rt_sigprocmask /* 4195 */
421 PTR compat_sys_rt_sigpending
422 PTR compat_sys_rt_sigtimedwait
423 PTR compat_sys_rt_sigqueueinfo
424 PTR compat_sys_rt_sigsuspend
425 PTR sys_32_pread /* 4200 */
426 PTR sys_32_pwrite
427 PTR sys_chown
428 PTR sys_getcwd
429 PTR sys_capget
430 PTR sys_capset /* 4205 */
431 PTR compat_sys_sigaltstack
432 PTR compat_sys_sendfile
433 PTR sys_ni_syscall
434 PTR sys_ni_syscall
435 PTR sys_mips_mmap2 /* 4210 */
436 PTR sys_32_truncate64
437 PTR sys_32_ftruncate64
438 PTR sys_newstat
439 PTR sys_newlstat
440 PTR sys_newfstat /* 4215 */
441 PTR sys_pivot_root
442 PTR sys_mincore
443 PTR sys_madvise
444 PTR sys_getdents64
445 PTR compat_sys_fcntl64 /* 4220 */
446 PTR sys_ni_syscall
447 PTR sys_gettid
448 PTR sys32_readahead
449 PTR sys_setxattr
450 PTR sys_lsetxattr /* 4225 */
451 PTR sys_fsetxattr
452 PTR sys_getxattr
453 PTR sys_lgetxattr
454 PTR sys_fgetxattr
455 PTR sys_listxattr /* 4230 */
456 PTR sys_llistxattr
457 PTR sys_flistxattr
458 PTR sys_removexattr
459 PTR sys_lremovexattr
460 PTR sys_fremovexattr /* 4235 */
461 PTR sys_tkill
462 PTR sys_sendfile64
463 PTR compat_sys_futex
464 PTR compat_sys_sched_setaffinity
465 PTR compat_sys_sched_getaffinity /* 4240 */
466 PTR compat_sys_io_setup
467 PTR sys_io_destroy
468 PTR compat_sys_io_getevents
469 PTR compat_sys_io_submit
470 PTR sys_io_cancel /* 4245 */
471 PTR sys_exit_group
472 PTR compat_sys_lookup_dcookie
473 PTR sys_epoll_create
474 PTR sys_epoll_ctl
475 PTR sys_epoll_wait /* 4250 */
476 PTR sys_remap_file_pages
477 PTR sys_set_tid_address
478 PTR sys_restart_syscall
479 PTR sys32_fadvise64_64
480 PTR compat_sys_statfs64 /* 4255 */
481 PTR compat_sys_fstatfs64
482 PTR compat_sys_timer_create
483 PTR compat_sys_timer_settime
484 PTR compat_sys_timer_gettime
485 PTR sys_timer_getoverrun /* 4260 */
486 PTR sys_timer_delete
487 PTR compat_sys_clock_settime
488 PTR compat_sys_clock_gettime
489 PTR compat_sys_clock_getres
490 PTR compat_sys_clock_nanosleep /* 4265 */
491 PTR sys_tgkill
492 PTR compat_sys_utimes
493 PTR compat_sys_mbind
494 PTR compat_sys_get_mempolicy
495 PTR compat_sys_set_mempolicy /* 4270 */
496 PTR compat_sys_mq_open
497 PTR sys_mq_unlink
498 PTR compat_sys_mq_timedsend
499 PTR compat_sys_mq_timedreceive
500 PTR compat_sys_mq_notify /* 4275 */
501 PTR compat_sys_mq_getsetattr
502 PTR sys_ni_syscall /* sys_vserver */
503 PTR compat_sys_waitid
504 PTR sys_ni_syscall /* available, was setaltroot */
505 PTR sys_add_key /* 4280 */
506 PTR sys_request_key
507 PTR compat_sys_keyctl
508 PTR sys_set_thread_area
509 PTR sys_inotify_init
510 PTR sys_inotify_add_watch /* 4285 */
511 PTR sys_inotify_rm_watch
512 PTR compat_sys_migrate_pages
513 PTR compat_sys_openat
514 PTR sys_mkdirat
515 PTR sys_mknodat /* 4290 */
516 PTR sys_fchownat
517 PTR compat_sys_futimesat
518 PTR sys_newfstatat
519 PTR sys_unlinkat
520 PTR sys_renameat /* 4295 */
521 PTR sys_linkat
522 PTR sys_symlinkat
523 PTR sys_readlinkat
524 PTR sys_fchmodat
525 PTR sys_faccessat /* 4300 */
526 PTR compat_sys_pselect6
527 PTR compat_sys_ppoll
528 PTR sys_unshare
529 PTR sys_splice
530 PTR sys32_sync_file_range /* 4305 */
531 PTR sys_tee
532 PTR compat_sys_vmsplice
533 PTR compat_sys_move_pages
534 PTR compat_sys_set_robust_list
535 PTR compat_sys_get_robust_list /* 4310 */
536 PTR compat_sys_kexec_load
537 PTR sys_getcpu
538 PTR compat_sys_epoll_pwait
539 PTR sys_ioprio_set
540 PTR sys_ioprio_get /* 4315 */
541 PTR compat_sys_utimensat
542 PTR compat_sys_signalfd
543 PTR sys_ni_syscall /* was timerfd */
544 PTR sys_eventfd
545 PTR sys32_fallocate /* 4320 */
546 PTR sys_timerfd_create
547 PTR compat_sys_timerfd_gettime
548 PTR compat_sys_timerfd_settime
549 PTR compat_sys_signalfd4
550 PTR sys_eventfd2 /* 4325 */
551 PTR sys_epoll_create1
552 PTR sys_dup3
553 PTR sys_pipe2
554 PTR sys_inotify_init1
555 PTR compat_sys_preadv /* 4330 */
556 PTR compat_sys_pwritev
557 PTR compat_sys_rt_tgsigqueueinfo
558 PTR sys_perf_event_open
559 PTR sys_accept4
560 PTR compat_sys_recvmmsg /* 4335 */
561 PTR sys_fanotify_init
562 PTR compat_sys_fanotify_mark
563 PTR sys_prlimit64
564 PTR sys_name_to_handle_at
565 PTR compat_sys_open_by_handle_at /* 4340 */
566 PTR compat_sys_clock_adjtime
567 PTR sys_syncfs
568 PTR compat_sys_sendmmsg
569 PTR sys_setns
570 PTR compat_sys_process_vm_readv /* 4345 */
571 PTR compat_sys_process_vm_writev
572 PTR sys_kcmp
573 PTR sys_finit_module
574 PTR sys_sched_setattr
575 PTR sys_sched_getattr /* 4350 */
576 PTR sys_renameat2
577 PTR sys_seccomp
578 PTR sys_getrandom
579 PTR sys_memfd_create
580 PTR sys_bpf /* 4355 */
581 PTR compat_sys_execveat
582 PTR sys_userfaultfd
583 PTR sys_membarrier
584 PTR sys_mlock2
585 PTR sys_copy_file_range /* 4360 */
586 PTR compat_sys_preadv2
587 PTR compat_sys_pwritev2
588 .size sys32_call_table,.-sys32_call_table