| blob | 73913f072e3916f36c23bda86870f83002a725c0 |
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
202 move a0, a1 # shift argument registers
203 move a1, a2
204 move a2, a3
205 move a3, a4
206 move a4, a5
207 move a5, a6
208 move a6, a7
209 jr t2
210 /* Unreached */
212 einval: li v0, -ENOSYS
213 jr ra
214 END(sys32_syscall)
216 .align 3
217 .type sys32_call_table,@object
218 EXPORT(sys32_call_table)
219 PTR sys32_syscall /* 4000 */
220 PTR sys_exit
221 PTR __sys_fork
222 PTR sys_read
223 PTR sys_write
224 PTR compat_sys_open /* 4005 */
225 PTR sys_close
226 PTR sys_waitpid
227 PTR sys_creat
228 PTR sys_link
229 PTR sys_unlink /* 4010 */
230 PTR compat_sys_execve
231 PTR sys_chdir
232 PTR compat_sys_time
233 PTR sys_mknod
234 PTR sys_chmod /* 4015 */
235 PTR sys_lchown
236 PTR sys_ni_syscall
237 PTR sys_ni_syscall /* was sys_stat */
238 PTR sys_lseek
239 PTR sys_getpid /* 4020 */
240 PTR compat_sys_mount
241 PTR sys_oldumount
242 PTR sys_setuid
243 PTR sys_getuid
244 PTR compat_sys_stime /* 4025 */
245 PTR compat_sys_ptrace
246 PTR sys_alarm
247 PTR sys_ni_syscall /* was sys_fstat */
248 PTR sys_pause
249 PTR compat_sys_utime /* 4030 */
250 PTR sys_ni_syscall
251 PTR sys_ni_syscall
252 PTR sys_access
253 PTR sys_nice
254 PTR sys_ni_syscall /* 4035 */
255 PTR sys_sync
256 PTR sys_kill
257 PTR sys_rename
258 PTR sys_mkdir
259 PTR sys_rmdir /* 4040 */
260 PTR sys_dup
261 PTR sysm_pipe
262 PTR compat_sys_times
263 PTR sys_ni_syscall
264 PTR sys_brk /* 4045 */
265 PTR sys_setgid
266 PTR sys_getgid
267 PTR sys_ni_syscall /* was signal 2 */
268 PTR sys_geteuid
269 PTR sys_getegid /* 4050 */
270 PTR sys_acct
271 PTR sys_umount
272 PTR sys_ni_syscall
273 PTR compat_sys_ioctl
274 PTR compat_sys_fcntl /* 4055 */
275 PTR sys_ni_syscall
276 PTR sys_setpgid
277 PTR sys_ni_syscall
278 PTR sys_olduname
279 PTR sys_umask /* 4060 */
280 PTR sys_chroot
281 PTR compat_sys_ustat
282 PTR sys_dup2
283 PTR sys_getppid
284 PTR sys_getpgrp /* 4065 */
285 PTR sys_setsid
286 PTR sys_32_sigaction
287 PTR sys_sgetmask
288 PTR sys_ssetmask
289 PTR sys_setreuid /* 4070 */
290 PTR sys_setregid
291 PTR sys32_sigsuspend
292 PTR compat_sys_sigpending
293 PTR sys_sethostname
294 PTR compat_sys_setrlimit /* 4075 */
295 PTR compat_sys_getrlimit
296 PTR compat_sys_getrusage
297 PTR compat_sys_gettimeofday
298 PTR compat_sys_settimeofday
299 PTR sys_getgroups /* 4080 */
300 PTR sys_setgroups
301 PTR sys_ni_syscall /* old_select */
302 PTR sys_symlink
303 PTR sys_ni_syscall /* was sys_lstat */
304 PTR sys_readlink /* 4085 */
305 PTR sys_uselib
306 PTR sys_swapon
307 PTR sys_reboot
308 PTR compat_sys_old_readdir
309 PTR sys_mips_mmap /* 4090 */
310 PTR sys_munmap
311 PTR compat_sys_truncate
312 PTR compat_sys_ftruncate
313 PTR sys_fchmod
314 PTR sys_fchown /* 4095 */
315 PTR sys_getpriority
316 PTR sys_setpriority
317 PTR sys_ni_syscall
318 PTR compat_sys_statfs
319 PTR compat_sys_fstatfs /* 4100 */
320 PTR sys_ni_syscall /* sys_ioperm */
321 PTR compat_sys_socketcall
322 PTR sys_syslog
323 PTR compat_sys_setitimer
324 PTR compat_sys_getitimer /* 4105 */
325 PTR compat_sys_newstat
326 PTR compat_sys_newlstat
327 PTR compat_sys_newfstat
328 PTR sys_uname
329 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
330 PTR sys_vhangup
331 PTR sys_ni_syscall /* was sys_idle */
332 PTR sys_ni_syscall /* sys_vm86 */
333 PTR compat_sys_wait4
334 PTR sys_swapoff /* 4115 */
335 PTR compat_sys_sysinfo
336 PTR compat_sys_ipc
337 PTR sys_fsync
338 PTR sys32_sigreturn
339 PTR __sys_clone /* 4120 */
340 PTR sys_setdomainname
341 PTR sys_newuname
342 PTR sys_ni_syscall /* sys_modify_ldt */
343 PTR compat_sys_adjtimex
344 PTR sys_mprotect /* 4125 */
345 PTR compat_sys_sigprocmask
346 PTR sys_ni_syscall /* was creat_module */
347 PTR sys_init_module
348 PTR sys_delete_module
349 PTR sys_ni_syscall /* 4130, get_kernel_syms */
350 PTR sys_quotactl
351 PTR sys_getpgid
352 PTR sys_fchdir
353 PTR sys_bdflush
354 PTR sys_sysfs /* 4135 */
355 PTR sys_32_personality
356 PTR sys_ni_syscall /* for afs_syscall */
357 PTR sys_setfsuid
358 PTR sys_setfsgid
359 PTR sys_32_llseek /* 4140 */
360 PTR compat_sys_getdents
361 PTR compat_sys_select
362 PTR sys_flock
363 PTR sys_msync
364 PTR compat_sys_readv /* 4145 */
365 PTR compat_sys_writev
366 PTR sys_cacheflush
367 PTR sys_cachectl
368 PTR __sys_sysmips
369 PTR sys_ni_syscall /* 4150 */
370 PTR sys_getsid
371 PTR sys_fdatasync
372 PTR compat_sys_sysctl
373 PTR sys_mlock
374 PTR sys_munlock /* 4155 */
375 PTR sys_mlockall
376 PTR sys_munlockall
377 PTR sys_sched_setparam
378 PTR sys_sched_getparam
379 PTR sys_sched_setscheduler /* 4160 */
380 PTR sys_sched_getscheduler
381 PTR sys_sched_yield
382 PTR sys_sched_get_priority_max
383 PTR sys_sched_get_priority_min
384 PTR compat_sys_sched_rr_get_interval /* 4165 */
385 PTR compat_sys_nanosleep
386 PTR sys_mremap
387 PTR sys_accept
388 PTR sys_bind
389 PTR sys_connect /* 4170 */
390 PTR sys_getpeername
391 PTR sys_getsockname
392 PTR compat_sys_getsockopt
393 PTR sys_listen
394 PTR compat_sys_recv /* 4175 */
395 PTR compat_sys_recvfrom
396 PTR compat_sys_recvmsg
397 PTR sys_send
398 PTR compat_sys_sendmsg
399 PTR sys_sendto /* 4180 */
400 PTR compat_sys_setsockopt
401 PTR sys_shutdown
402 PTR sys_socket
403 PTR sys_socketpair
404 PTR sys_setresuid /* 4185 */
405 PTR sys_getresuid
406 PTR sys_ni_syscall /* was query_module */
407 PTR sys_poll
408 PTR sys_ni_syscall /* was nfsservctl */
409 PTR sys_setresgid /* 4190 */
410 PTR sys_getresgid
411 PTR sys_prctl
412 PTR sys32_rt_sigreturn
413 PTR compat_sys_rt_sigaction
414 PTR compat_sys_rt_sigprocmask /* 4195 */
415 PTR compat_sys_rt_sigpending
416 PTR compat_sys_rt_sigtimedwait
417 PTR compat_sys_rt_sigqueueinfo
418 PTR compat_sys_rt_sigsuspend
419 PTR sys_32_pread /* 4200 */
420 PTR sys_32_pwrite
421 PTR sys_chown
422 PTR sys_getcwd
423 PTR sys_capget
424 PTR sys_capset /* 4205 */
425 PTR compat_sys_sigaltstack
426 PTR compat_sys_sendfile
427 PTR sys_ni_syscall
428 PTR sys_ni_syscall
429 PTR sys_mips_mmap2 /* 4210 */
430 PTR sys_32_truncate64
431 PTR sys_32_ftruncate64
432 PTR sys_newstat
433 PTR sys_newlstat
434 PTR sys_newfstat /* 4215 */
435 PTR sys_pivot_root
436 PTR sys_mincore
437 PTR sys_madvise
438 PTR sys_getdents64
439 PTR compat_sys_fcntl64 /* 4220 */
440 PTR sys_ni_syscall
441 PTR sys_gettid
442 PTR sys32_readahead
443 PTR sys_setxattr
444 PTR sys_lsetxattr /* 4225 */
445 PTR sys_fsetxattr
446 PTR sys_getxattr
447 PTR sys_lgetxattr
448 PTR sys_fgetxattr
449 PTR sys_listxattr /* 4230 */
450 PTR sys_llistxattr
451 PTR sys_flistxattr
452 PTR sys_removexattr
453 PTR sys_lremovexattr
454 PTR sys_fremovexattr /* 4235 */
455 PTR sys_tkill
456 PTR sys_sendfile64
457 PTR compat_sys_futex
458 PTR compat_sys_sched_setaffinity
459 PTR compat_sys_sched_getaffinity /* 4240 */
460 PTR compat_sys_io_setup
461 PTR sys_io_destroy
462 PTR compat_sys_io_getevents
463 PTR compat_sys_io_submit
464 PTR sys_io_cancel /* 4245 */
465 PTR sys_exit_group
466 PTR compat_sys_lookup_dcookie
467 PTR sys_epoll_create
468 PTR sys_epoll_ctl
469 PTR sys_epoll_wait /* 4250 */
470 PTR sys_remap_file_pages
471 PTR sys_set_tid_address
472 PTR sys_restart_syscall
473 PTR sys32_fadvise64_64
474 PTR compat_sys_statfs64 /* 4255 */
475 PTR compat_sys_fstatfs64
476 PTR compat_sys_timer_create
477 PTR compat_sys_timer_settime
478 PTR compat_sys_timer_gettime
479 PTR sys_timer_getoverrun /* 4260 */
480 PTR sys_timer_delete
481 PTR compat_sys_clock_settime
482 PTR compat_sys_clock_gettime
483 PTR compat_sys_clock_getres
484 PTR compat_sys_clock_nanosleep /* 4265 */
485 PTR sys_tgkill
486 PTR compat_sys_utimes
487 PTR compat_sys_mbind
488 PTR compat_sys_get_mempolicy
489 PTR compat_sys_set_mempolicy /* 4270 */
490 PTR compat_sys_mq_open
491 PTR sys_mq_unlink
492 PTR compat_sys_mq_timedsend
493 PTR compat_sys_mq_timedreceive
494 PTR compat_sys_mq_notify /* 4275 */
495 PTR compat_sys_mq_getsetattr
496 PTR sys_ni_syscall /* sys_vserver */
497 PTR compat_sys_waitid
498 PTR sys_ni_syscall /* available, was setaltroot */
499 PTR sys_add_key /* 4280 */
500 PTR sys_request_key
501 PTR compat_sys_keyctl
502 PTR sys_set_thread_area
503 PTR sys_inotify_init
504 PTR sys_inotify_add_watch /* 4285 */
505 PTR sys_inotify_rm_watch
506 PTR compat_sys_migrate_pages
507 PTR compat_sys_openat
508 PTR sys_mkdirat
509 PTR sys_mknodat /* 4290 */
510 PTR sys_fchownat
511 PTR compat_sys_futimesat
512 PTR sys_newfstatat
513 PTR sys_unlinkat
514 PTR sys_renameat /* 4295 */
515 PTR sys_linkat
516 PTR sys_symlinkat
517 PTR sys_readlinkat
518 PTR sys_fchmodat
519 PTR sys_faccessat /* 4300 */
520 PTR compat_sys_pselect6
521 PTR compat_sys_ppoll
522 PTR sys_unshare
523 PTR sys_splice
524 PTR sys32_sync_file_range /* 4305 */
525 PTR sys_tee
526 PTR compat_sys_vmsplice
527 PTR compat_sys_move_pages
528 PTR compat_sys_set_robust_list
529 PTR compat_sys_get_robust_list /* 4310 */
530 PTR compat_sys_kexec_load
531 PTR sys_getcpu
532 PTR compat_sys_epoll_pwait
533 PTR sys_ioprio_set
534 PTR sys_ioprio_get /* 4315 */
535 PTR compat_sys_utimensat
536 PTR compat_sys_signalfd
537 PTR sys_ni_syscall /* was timerfd */
538 PTR sys_eventfd
539 PTR sys32_fallocate /* 4320 */
540 PTR sys_timerfd_create
541 PTR compat_sys_timerfd_gettime
542 PTR compat_sys_timerfd_settime
543 PTR compat_sys_signalfd4
544 PTR sys_eventfd2 /* 4325 */
545 PTR sys_epoll_create1
546 PTR sys_dup3
547 PTR sys_pipe2
548 PTR sys_inotify_init1
549 PTR compat_sys_preadv /* 4330 */
550 PTR compat_sys_pwritev
551 PTR compat_sys_rt_tgsigqueueinfo
552 PTR sys_perf_event_open
553 PTR sys_accept4
554 PTR compat_sys_recvmmsg /* 4335 */
555 PTR sys_fanotify_init
556 PTR compat_sys_fanotify_mark
557 PTR sys_prlimit64
558 PTR sys_name_to_handle_at
559 PTR compat_sys_open_by_handle_at /* 4340 */
560 PTR compat_sys_clock_adjtime
561 PTR sys_syncfs
562 PTR compat_sys_sendmmsg
563 PTR sys_setns
564 PTR compat_sys_process_vm_readv /* 4345 */
565 PTR compat_sys_process_vm_writev
566 PTR sys_kcmp
567 PTR sys_finit_module
568 PTR sys_sched_setattr
569 PTR sys_sched_getattr /* 4350 */
570 PTR sys_renameat2
571 PTR sys_seccomp
572 PTR sys_getrandom
573 PTR sys_memfd_create
574 PTR sys_bpf /* 4355 */
575 PTR compat_sys_execveat
576 PTR sys_userfaultfd
577 PTR sys_membarrier
578 PTR sys_mlock2
579 PTR sys_copy_file_range /* 4360 */
580 PTR compat_sys_preadv2
581 PTR compat_sys_pwritev2
582 PTR sys_pkey_mprotect
583 PTR sys_pkey_alloc
584 PTR sys_pkey_free /* 4365 */
585 PTR sys_statx
586 PTR sys_rseq
587 PTR compat_sys_io_pgetevents
588 .size sys32_call_table,.-sys32_call_table