| blob | 91b43eea2d5a073026ef8f4928d74e41ca0bfb07 |
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 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
60 /*
61 * More than four arguments. Try to deal with it by copying the
62 * stack arguments from the user stack to the kernel stack.
63 * This Sucks (TM).
64 *
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.
67 */
68 ld t0, PT_R29(sp) # get old user stack pointer
69 daddu t1, t0, 32
70 bltz t1, bad_stack
72 load_a4: lw a4, 16(t0) # argument #5 from usp
73 load_a5: lw a5, 20(t0) # argument #6 from usp
74 load_a6: lw a6, 24(t0) # argument #7 from usp
75 load_a7: lw a7, 28(t0) # argument #8 from usp
76 loads_done:
78 .section __ex_table,"a"
79 PTR load_a4, bad_stack_a4
80 PTR load_a5, bad_stack_a5
81 PTR load_a6, bad_stack_a6
82 PTR load_a7, bad_stack_a7
83 .previous
85 li t1, _TIF_WORK_SYSCALL_ENTRY
86 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
87 and t0, t1, t0
88 bnez t0, trace_a_syscall
90 syscall_common:
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 s0, t2 # Save syscall pointer
116 move a0, sp
117 /*
118 * absolute syscall number is in v0 unless we called syscall(__NR_###)
119 * where the real syscall number is in a0
120 * note: NR_syscall is the first O32 syscall but the macro is
121 * only defined when compiling with -mabi=32 (CONFIG_32BIT)
122 * therefore __NR_O32_Linux is used (4000)
123 */
124 .set push
125 .set reorder
126 subu t1, v0, __NR_O32_Linux
127 move a1, v0
128 bnez t1, 1f /* __NR_syscall at offset 0 */
129 lw a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
130 .set pop
132 1: jal syscall_trace_enter
134 bltz v0, 1f # seccomp failed? Skip syscall
136 move t2, s0
137 RESTORE_STATIC
138 ld a0, PT_R4(sp) # Restore argument registers
139 ld a1, PT_R5(sp)
140 ld a2, PT_R6(sp)
141 ld a3, PT_R7(sp)
142 ld a4, PT_R8(sp)
143 ld a5, PT_R9(sp)
144 ld a6, PT_R10(sp)
145 ld a7, PT_R11(sp) # For indirect syscalls
146 j syscall_common
148 1: j syscall_exit
150 /* ------------------------------------------------------------------------ */
152 /*
153 * The stackpointer for a call with more than 4 arguments is bad.
154 */
155 bad_stack:
156 li v0, EFAULT
157 sd v0, PT_R2(sp)
158 li t0, 1 # set error flag
159 sd t0, PT_R7(sp)
160 j o32_syscall_exit
162 bad_stack_a4:
163 li a4, 0
164 b load_a5
166 bad_stack_a5:
167 li a5, 0
168 b load_a6
170 bad_stack_a6:
171 li a6, 0
172 b load_a7
174 bad_stack_a7:
175 li a7, 0
176 b loads_done
178 not_o32_scall:
179 /*
180 * This is not an o32 compatibility syscall, pass it on
181 * to the 64-bit syscall handlers.
182 */
183 #ifdef CONFIG_MIPS32_N32
184 j handle_sysn32
185 #else
186 j handle_sys64
187 #endif
188 END(handle_sys)
190 LEAF(sys32_syscall)
191 subu t0, a0, __NR_O32_Linux # check syscall number
192 sltiu v0, t0, __NR_O32_Linux_syscalls + 1
193 beqz t0, einval # do not recurse
194 dsll t1, t0, 3
195 beqz v0, einval
196 ld t2, sys32_call_table(t1) # syscall routine
197 sd a0, PT_R2(sp) # call routine directly on restart
199 move a0, a1 # shift argument registers
200 move a1, a2
201 move a2, a3
202 move a3, a4
203 move a4, a5
204 move a5, a6
205 move a6, a7
206 sd a0, PT_R4(sp) # ... and push back a0 - a3, some
207 sd a1, PT_R5(sp) # syscalls expect them there
208 sd a2, PT_R6(sp)
209 sd a3, PT_R7(sp)
210 sd a3, PT_R26(sp) # update a3 for syscall restarting
211 jr t2
212 /* Unreached */
214 einval: li v0, -ENOSYS
215 jr ra
216 END(sys32_syscall)
218 .align 3
219 .type sys32_call_table,@object
220 EXPORT(sys32_call_table)
221 PTR sys32_syscall /* 4000 */
222 PTR sys_exit
223 PTR __sys_fork
224 PTR sys_read
225 PTR sys_write
226 PTR compat_sys_open /* 4005 */
227 PTR sys_close
228 PTR sys_waitpid
229 PTR sys_creat
230 PTR sys_link
231 PTR sys_unlink /* 4010 */
232 PTR compat_sys_execve
233 PTR sys_chdir
234 PTR compat_sys_time
235 PTR sys_mknod
236 PTR sys_chmod /* 4015 */
237 PTR sys_lchown
238 PTR sys_ni_syscall
239 PTR sys_ni_syscall /* was sys_stat */
240 PTR sys_lseek
241 PTR sys_getpid /* 4020 */
242 PTR compat_sys_mount
243 PTR sys_oldumount
244 PTR sys_setuid
245 PTR sys_getuid
246 PTR compat_sys_stime /* 4025 */
247 PTR compat_sys_ptrace
248 PTR sys_alarm
249 PTR sys_ni_syscall /* was sys_fstat */
250 PTR sys_pause
251 PTR compat_sys_utime /* 4030 */
252 PTR sys_ni_syscall
253 PTR sys_ni_syscall
254 PTR sys_access
255 PTR sys_nice
256 PTR sys_ni_syscall /* 4035 */
257 PTR sys_sync
258 PTR sys_kill
259 PTR sys_rename
260 PTR sys_mkdir
261 PTR sys_rmdir /* 4040 */
262 PTR sys_dup
263 PTR sysm_pipe
264 PTR compat_sys_times
265 PTR sys_ni_syscall
266 PTR sys_brk /* 4045 */
267 PTR sys_setgid
268 PTR sys_getgid
269 PTR sys_ni_syscall /* was signal 2 */
270 PTR sys_geteuid
271 PTR sys_getegid /* 4050 */
272 PTR sys_acct
273 PTR sys_umount
274 PTR sys_ni_syscall
275 PTR compat_sys_ioctl
276 PTR compat_sys_fcntl /* 4055 */
277 PTR sys_ni_syscall
278 PTR sys_setpgid
279 PTR sys_ni_syscall
280 PTR sys_olduname
281 PTR sys_umask /* 4060 */
282 PTR sys_chroot
283 PTR compat_sys_ustat
284 PTR sys_dup2
285 PTR sys_getppid
286 PTR sys_getpgrp /* 4065 */
287 PTR sys_setsid
288 PTR sys_32_sigaction
289 PTR sys_sgetmask
290 PTR sys_ssetmask
291 PTR sys_setreuid /* 4070 */
292 PTR sys_setregid
293 PTR sys32_sigsuspend
294 PTR compat_sys_sigpending
295 PTR sys_sethostname
296 PTR compat_sys_setrlimit /* 4075 */
297 PTR compat_sys_getrlimit
298 PTR compat_sys_getrusage
299 PTR compat_sys_gettimeofday
300 PTR compat_sys_settimeofday
301 PTR sys_getgroups /* 4080 */
302 PTR sys_setgroups
303 PTR sys_ni_syscall /* old_select */
304 PTR sys_symlink
305 PTR sys_ni_syscall /* was sys_lstat */
306 PTR sys_readlink /* 4085 */
307 PTR sys_uselib
308 PTR sys_swapon
309 PTR sys_reboot
310 PTR compat_sys_old_readdir
311 PTR sys_mips_mmap /* 4090 */
312 PTR sys_munmap
313 PTR compat_sys_truncate
314 PTR compat_sys_ftruncate
315 PTR sys_fchmod
316 PTR sys_fchown /* 4095 */
317 PTR sys_getpriority
318 PTR sys_setpriority
319 PTR sys_ni_syscall
320 PTR compat_sys_statfs
321 PTR compat_sys_fstatfs /* 4100 */
322 PTR sys_ni_syscall /* sys_ioperm */
323 PTR compat_sys_socketcall
324 PTR sys_syslog
325 PTR compat_sys_setitimer
326 PTR compat_sys_getitimer /* 4105 */
327 PTR compat_sys_newstat
328 PTR compat_sys_newlstat
329 PTR compat_sys_newfstat
330 PTR sys_uname
331 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
332 PTR sys_vhangup
333 PTR sys_ni_syscall /* was sys_idle */
334 PTR sys_ni_syscall /* sys_vm86 */
335 PTR compat_sys_wait4
336 PTR sys_swapoff /* 4115 */
337 PTR compat_sys_sysinfo
338 PTR compat_sys_ipc
339 PTR sys_fsync
340 PTR sys32_sigreturn
341 PTR __sys_clone /* 4120 */
342 PTR sys_setdomainname
343 PTR sys_newuname
344 PTR sys_ni_syscall /* sys_modify_ldt */
345 PTR compat_sys_adjtimex
346 PTR sys_mprotect /* 4125 */
347 PTR compat_sys_sigprocmask
348 PTR sys_ni_syscall /* was creat_module */
349 PTR sys_init_module
350 PTR sys_delete_module
351 PTR sys_ni_syscall /* 4130, get_kernel_syms */
352 PTR sys_quotactl
353 PTR sys_getpgid
354 PTR sys_fchdir
355 PTR sys_bdflush
356 PTR sys_sysfs /* 4135 */
357 PTR sys_32_personality
358 PTR sys_ni_syscall /* for afs_syscall */
359 PTR sys_setfsuid
360 PTR sys_setfsgid
361 PTR sys_32_llseek /* 4140 */
362 PTR compat_sys_getdents
363 PTR compat_sys_select
364 PTR sys_flock
365 PTR sys_msync
366 PTR compat_sys_readv /* 4145 */
367 PTR compat_sys_writev
368 PTR sys_cacheflush
369 PTR sys_cachectl
370 PTR sys_sysmips
371 PTR sys_ni_syscall /* 4150 */
372 PTR sys_getsid
373 PTR sys_fdatasync
374 PTR compat_sys_sysctl
375 PTR sys_mlock
376 PTR sys_munlock /* 4155 */
377 PTR sys_mlockall
378 PTR sys_munlockall
379 PTR sys_sched_setparam
380 PTR sys_sched_getparam
381 PTR sys_sched_setscheduler /* 4160 */
382 PTR sys_sched_getscheduler
383 PTR sys_sched_yield
384 PTR sys_sched_get_priority_max
385 PTR sys_sched_get_priority_min
386 PTR compat_sys_sched_rr_get_interval /* 4165 */
387 PTR compat_sys_nanosleep
388 PTR sys_mremap
389 PTR sys_accept
390 PTR sys_bind
391 PTR sys_connect /* 4170 */
392 PTR sys_getpeername
393 PTR sys_getsockname
394 PTR compat_sys_getsockopt
395 PTR sys_listen
396 PTR compat_sys_recv /* 4175 */
397 PTR compat_sys_recvfrom
398 PTR compat_sys_recvmsg
399 PTR sys_send
400 PTR compat_sys_sendmsg
401 PTR sys_sendto /* 4180 */
402 PTR compat_sys_setsockopt
403 PTR sys_shutdown
404 PTR sys_socket
405 PTR sys_socketpair
406 PTR sys_setresuid /* 4185 */
407 PTR sys_getresuid
408 PTR sys_ni_syscall /* was query_module */
409 PTR sys_poll
410 PTR sys_ni_syscall /* was nfsservctl */
411 PTR sys_setresgid /* 4190 */
412 PTR sys_getresgid
413 PTR sys_prctl
414 PTR sys32_rt_sigreturn
415 PTR compat_sys_rt_sigaction
416 PTR compat_sys_rt_sigprocmask /* 4195 */
417 PTR compat_sys_rt_sigpending
418 PTR compat_sys_rt_sigtimedwait
419 PTR compat_sys_rt_sigqueueinfo
420 PTR compat_sys_rt_sigsuspend
421 PTR sys_32_pread /* 4200 */
422 PTR sys_32_pwrite
423 PTR sys_chown
424 PTR sys_getcwd
425 PTR sys_capget
426 PTR sys_capset /* 4205 */
427 PTR compat_sys_sigaltstack
428 PTR compat_sys_sendfile
429 PTR sys_ni_syscall
430 PTR sys_ni_syscall
431 PTR sys_mips_mmap2 /* 4210 */
432 PTR sys_32_truncate64
433 PTR sys_32_ftruncate64
434 PTR sys_newstat
435 PTR sys_newlstat
436 PTR sys_newfstat /* 4215 */
437 PTR sys_pivot_root
438 PTR sys_mincore
439 PTR sys_madvise
440 PTR sys_getdents64
441 PTR compat_sys_fcntl64 /* 4220 */
442 PTR sys_ni_syscall
443 PTR sys_gettid
444 PTR sys32_readahead
445 PTR sys_setxattr
446 PTR sys_lsetxattr /* 4225 */
447 PTR sys_fsetxattr
448 PTR sys_getxattr
449 PTR sys_lgetxattr
450 PTR sys_fgetxattr
451 PTR sys_listxattr /* 4230 */
452 PTR sys_llistxattr
453 PTR sys_flistxattr
454 PTR sys_removexattr
455 PTR sys_lremovexattr
456 PTR sys_fremovexattr /* 4235 */
457 PTR sys_tkill
458 PTR sys_sendfile64
459 PTR compat_sys_futex
460 PTR compat_sys_sched_setaffinity
461 PTR compat_sys_sched_getaffinity /* 4240 */
462 PTR compat_sys_io_setup
463 PTR sys_io_destroy
464 PTR compat_sys_io_getevents
465 PTR compat_sys_io_submit
466 PTR sys_io_cancel /* 4245 */
467 PTR sys_exit_group
468 PTR compat_sys_lookup_dcookie
469 PTR sys_epoll_create
470 PTR sys_epoll_ctl
471 PTR sys_epoll_wait /* 4250 */
472 PTR sys_remap_file_pages
473 PTR sys_set_tid_address
474 PTR sys_restart_syscall
475 PTR sys32_fadvise64_64
476 PTR compat_sys_statfs64 /* 4255 */
477 PTR compat_sys_fstatfs64
478 PTR compat_sys_timer_create
479 PTR compat_sys_timer_settime
480 PTR compat_sys_timer_gettime
481 PTR sys_timer_getoverrun /* 4260 */
482 PTR sys_timer_delete
483 PTR compat_sys_clock_settime
484 PTR compat_sys_clock_gettime
485 PTR compat_sys_clock_getres
486 PTR compat_sys_clock_nanosleep /* 4265 */
487 PTR sys_tgkill
488 PTR compat_sys_utimes
489 PTR compat_sys_mbind
490 PTR compat_sys_get_mempolicy
491 PTR compat_sys_set_mempolicy /* 4270 */
492 PTR compat_sys_mq_open
493 PTR sys_mq_unlink
494 PTR compat_sys_mq_timedsend
495 PTR compat_sys_mq_timedreceive
496 PTR compat_sys_mq_notify /* 4275 */
497 PTR compat_sys_mq_getsetattr
498 PTR sys_ni_syscall /* sys_vserver */
499 PTR compat_sys_waitid
500 PTR sys_ni_syscall /* available, was setaltroot */
501 PTR sys_add_key /* 4280 */
502 PTR sys_request_key
503 PTR sys_keyctl
504 PTR sys_set_thread_area
505 PTR sys_inotify_init
506 PTR sys_inotify_add_watch /* 4285 */
507 PTR sys_inotify_rm_watch
508 PTR compat_sys_migrate_pages
509 PTR compat_sys_openat
510 PTR sys_mkdirat
511 PTR sys_mknodat /* 4290 */
512 PTR sys_fchownat
513 PTR compat_sys_futimesat
514 PTR sys_newfstatat
515 PTR sys_unlinkat
516 PTR sys_renameat /* 4295 */
517 PTR sys_linkat
518 PTR sys_symlinkat
519 PTR sys_readlinkat
520 PTR sys_fchmodat
521 PTR sys_faccessat /* 4300 */
522 PTR compat_sys_pselect6
523 PTR compat_sys_ppoll
524 PTR sys_unshare
525 PTR sys_splice
526 PTR sys32_sync_file_range /* 4305 */
527 PTR sys_tee
528 PTR compat_sys_vmsplice
529 PTR compat_sys_move_pages
530 PTR compat_sys_set_robust_list
531 PTR compat_sys_get_robust_list /* 4310 */
532 PTR compat_sys_kexec_load
533 PTR sys_getcpu
534 PTR compat_sys_epoll_pwait
535 PTR sys_ioprio_set
536 PTR sys_ioprio_get /* 4315 */
537 PTR compat_sys_utimensat
538 PTR compat_sys_signalfd
539 PTR sys_ni_syscall /* was timerfd */
540 PTR sys_eventfd
541 PTR sys32_fallocate /* 4320 */
542 PTR sys_timerfd_create
543 PTR compat_sys_timerfd_gettime
544 PTR compat_sys_timerfd_settime
545 PTR compat_sys_signalfd4
546 PTR sys_eventfd2 /* 4325 */
547 PTR sys_epoll_create1
548 PTR sys_dup3
549 PTR sys_pipe2
550 PTR sys_inotify_init1
551 PTR compat_sys_preadv /* 4330 */
552 PTR compat_sys_pwritev
553 PTR compat_sys_rt_tgsigqueueinfo
554 PTR sys_perf_event_open
555 PTR sys_accept4
556 PTR compat_sys_recvmmsg /* 4335 */
557 PTR sys_fanotify_init
558 PTR compat_sys_fanotify_mark
559 PTR sys_prlimit64
560 PTR sys_name_to_handle_at
561 PTR compat_sys_open_by_handle_at /* 4340 */
562 PTR compat_sys_clock_adjtime
563 PTR sys_syncfs
564 PTR compat_sys_sendmmsg
565 PTR sys_setns
566 PTR compat_sys_process_vm_readv /* 4345 */
567 PTR compat_sys_process_vm_writev
568 PTR sys_kcmp
569 PTR sys_finit_module
570 PTR sys_sched_setattr
571 PTR sys_sched_getattr /* 4350 */
572 PTR sys_renameat2
573 PTR sys_seccomp
574 PTR sys_getrandom
575 PTR sys_memfd_create
576 PTR sys_bpf /* 4355 */
577 PTR compat_sys_execveat
578 PTR sys_userfaultfd
579 PTR sys_membarrier
580 PTR sys_mlock2
581 PTR sys_copy_file_range /* 4360 */
582 PTR compat_sys_preadv2
583 PTR compat_sys_pwritev2
584 .size sys32_call_table,.-sys32_call_table