| blob | 797e0d87488930fc4c453066a41eb3b4cf67a5f9 |
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/config.h>
17 #include <linux/errno.h>
18 #include <asm/asm.h>
19 #include <asm/asmmacro.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 STI
32 .set at
33 ld t1, PT_EPC(sp) # skip syscall on return
35 dsubu t0, v0, __NR_O32_Linux # check syscall number
36 sltiu t0, t0, __NR_O32_Linux_syscalls + 1
37 daddiu t1, 4 # skip to next instruction
38 sd t1, PT_EPC(sp)
39 beqz t0, not_o32_scall
40 #if 0
41 SAVE_ALL
42 move a1, v0
43 PRINT("Scall %ld\n")
44 RESTORE_ALL
45 #endif
47 /* We don't want to stumble over broken sign extensions from
48 userland. O32 does never use the upper half. */
49 sll a0, a0, 0
50 sll a1, a1, 0
51 sll a2, a2, 0
52 sll a3, a3, 0
54 dsll t0, v0, 3 # offset into table
55 ld t2, (sys_call_table - (__NR_O32_Linux * 8))(t0)
57 sd a3, PT_R26(sp) # save a3 for syscall restarting
59 /*
60 * More than four arguments. Try to deal with it by copying the
61 * stack arguments from the user stack to the kernel stack.
62 * This Sucks (TM).
63 *
64 * We intentionally keep the kernel stack a little below the top of
65 * userspace so we don't have to do a slower byte accurate check here.
66 */
67 ld t0, PT_R29(sp) # get old user stack pointer
68 daddu t1, t0, 32
69 bltz t1, bad_stack
71 1: lw a4, 16(t0) # argument #5 from usp
72 2: lw a5, 20(t0) # argument #6 from usp
73 3: lw a6, 24(t0) # argument #7 from usp
74 4: lw a7, 28(t0) # argument #8 from usp (for indirect syscalls)
76 .section __ex_table,"a"
77 PTR 1b, bad_stack
78 PTR 2b, bad_stack
79 PTR 3b, bad_stack
80 PTR 4b, bad_stack
81 .previous
83 li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
84 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
85 and t0, t1, t0
86 bnez t0, trace_a_syscall
88 jalr t2 # Do The Real Thing (TM)
90 li t0, -EMAXERRNO - 1 # error?
91 sltu t0, t0, v0
92 sd t0, PT_R7(sp) # set error flag
93 beqz t0, 1f
95 dnegu v0 # error
96 sd v0, PT_R0(sp) # flag for syscall restarting
97 1: sd v0, PT_R2(sp) # result
99 o32_syscall_exit:
100 local_irq_disable # make need_resched and
101 # signals dont change between
102 # sampling and return
103 LONG_L a2, TI_FLAGS($28)
104 li t0, _TIF_ALLWORK_MASK
105 and t0, a2, t0
106 bnez t0, o32_syscall_exit_work
108 j restore_partial
110 o32_syscall_exit_work:
111 j syscall_exit_work_partial
113 /* ------------------------------------------------------------------------ */
115 trace_a_syscall:
116 SAVE_STATIC
117 sd a4, PT_R8(sp) # Save argument registers
118 sd a5, PT_R9(sp)
119 sd a6, PT_R10(sp)
120 sd a7, PT_R11(sp) # For indirect syscalls
122 move s0, t2 # Save syscall pointer
123 move a0, sp
124 li a1, 0
125 jal do_syscall_trace
127 move t0, s0
128 RESTORE_STATIC
129 ld a0, PT_R4(sp) # Restore argument registers
130 ld a1, PT_R5(sp)
131 ld a2, PT_R6(sp)
132 ld a3, PT_R7(sp)
133 ld a4, PT_R8(sp)
134 ld a5, PT_R9(sp)
135 ld a6, PT_R10(sp)
136 ld a7, PT_R11(sp) # For indirect syscalls
137 jalr t0
139 li t0, -EMAXERRNO - 1 # error?
140 sltu t0, t0, v0
141 sd t0, PT_R7(sp) # set error flag
142 beqz t0, 1f
144 dnegu v0 # error
145 sd v0, PT_R0(sp) # set flag for syscall restarting
146 1: sd v0, PT_R2(sp) # result
148 j syscall_exit
150 /* ------------------------------------------------------------------------ */
152 /*
153 * The stackpointer for a call with more than 4 arguments is bad.
154 */
155 bad_stack:
156 dnegu v0 # error
157 sd v0, PT_R0(sp)
158 sd v0, PT_R2(sp)
159 li t0, 1 # set error flag
160 sd t0, PT_R7(sp)
161 j o32_syscall_exit
163 not_o32_scall:
164 /*
165 * This is not an o32 compatibility syscall, pass it on
166 * to the 64-bit syscall handlers.
167 */
168 #ifdef CONFIG_MIPS32_N32
169 j handle_sysn32
170 #else
171 j handle_sys64
172 #endif
173 END(handle_sys)
175 LEAF(sys32_syscall)
176 sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1
177 beqz v0, einval
179 dsll v0, a0, 3
180 ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)
182 li v1, 4000 # indirect syscall number
183 beq a0, v1, einval # do not recurse
185 move a0, a1 # shift argument registers
186 move a1, a2
187 move a2, a3
188 move a3, a4
189 move a4, a5
190 move a5, a6
191 move a6, a7
192 sd a0, PT_R4(sp) # ... and push back a0 - a3, some
193 sd a1, PT_R5(sp) # syscalls expect them there
194 sd a2, PT_R6(sp)
195 sd a3, PT_R7(sp)
196 sd a3, PT_R26(sp) # update a3 for syscall restarting
197 jr t2
198 /* Unreached */
200 einval: li v0, -EINVAL
201 jr ra
202 END(sys32_syscall)
204 .align 3
205 .type sys_call_table,@object
206 sys_call_table:
207 PTR sys32_syscall /* 4000 */
208 PTR sys_exit
209 PTR sys_fork
210 PTR sys_read
211 PTR sys_write
212 PTR sys_open /* 4005 */
213 PTR sys_close
214 PTR sys_waitpid
215 PTR sys_creat
216 PTR sys_link
217 PTR sys_unlink /* 4010 */
218 PTR sys32_execve
219 PTR sys_chdir
220 PTR compat_sys_time
221 PTR sys_mknod
222 PTR sys_chmod /* 4015 */
223 PTR sys_lchown
224 PTR sys_ni_syscall
225 PTR sys_ni_syscall /* was sys_stat */
226 PTR sys_lseek
227 PTR sys_getpid /* 4020 */
228 PTR sys_mount
229 PTR sys_oldumount
230 PTR sys_setuid
231 PTR sys_getuid
232 PTR compat_sys_stime /* 4025 */
233 PTR sys32_ptrace
234 PTR sys_alarm
235 PTR sys_ni_syscall /* was sys_fstat */
236 PTR sys_pause
237 PTR compat_sys_utime /* 4030 */
238 PTR sys_ni_syscall
239 PTR sys_ni_syscall
240 PTR sys_access
241 PTR sys_nice
242 PTR sys_ni_syscall /* 4035 */
243 PTR sys_sync
244 PTR sys_kill
245 PTR sys_rename
246 PTR sys_mkdir
247 PTR sys_rmdir /* 4040 */
248 PTR sys_dup
249 PTR sys_pipe
250 PTR compat_sys_times
251 PTR sys_ni_syscall
252 PTR sys_brk /* 4045 */
253 PTR sys_setgid
254 PTR sys_getgid
255 PTR sys_ni_syscall /* was signal 2 */
256 PTR sys_geteuid
257 PTR sys_getegid /* 4050 */
258 PTR sys_acct
259 PTR sys_umount
260 PTR sys_ni_syscall
261 PTR compat_sys_ioctl
262 PTR compat_sys_fcntl /* 4055 */
263 PTR sys_ni_syscall
264 PTR sys_setpgid
265 PTR sys_ni_syscall
266 PTR sys_olduname
267 PTR sys_umask /* 4060 */
268 PTR sys_chroot
269 PTR sys32_ustat
270 PTR sys_dup2
271 PTR sys_getppid
272 PTR sys_getpgrp /* 4065 */
273 PTR sys_setsid
274 PTR sys32_sigaction
275 PTR sys_sgetmask
276 PTR sys_ssetmask
277 PTR sys_setreuid /* 4070 */
278 PTR sys_setregid
279 PTR sys32_sigsuspend
280 PTR compat_sys_sigpending
281 PTR sys_sethostname
282 PTR compat_sys_setrlimit /* 4075 */
283 PTR compat_sys_getrlimit
284 PTR compat_sys_getrusage
285 PTR sys32_gettimeofday
286 PTR sys32_settimeofday
287 PTR sys_getgroups /* 4080 */
288 PTR sys_setgroups
289 PTR sys_ni_syscall /* old_select */
290 PTR sys_symlink
291 PTR sys_ni_syscall /* was sys_lstat */
292 PTR sys_readlink /* 4085 */
293 PTR sys_uselib
294 PTR sys_swapon
295 PTR sys_reboot
296 PTR compat_sys_old_readdir
297 PTR old_mmap /* 4090 */
298 PTR sys_munmap
299 PTR sys_truncate
300 PTR sys_ftruncate
301 PTR sys_fchmod
302 PTR sys_fchown /* 4095 */
303 PTR sys_getpriority
304 PTR sys_setpriority
305 PTR sys_ni_syscall
306 PTR compat_sys_statfs
307 PTR compat_sys_fstatfs /* 4100 */
308 PTR sys_ni_syscall /* sys_ioperm */
309 PTR sys32_socketcall
310 PTR sys_syslog
311 PTR compat_sys_setitimer
312 PTR compat_sys_getitimer /* 4105 */
313 PTR compat_sys_newstat
314 PTR compat_sys_newlstat
315 PTR compat_sys_newfstat
316 PTR sys_uname
317 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
318 PTR sys_vhangup
319 PTR sys_ni_syscall /* was sys_idle */
320 PTR sys_ni_syscall /* sys_vm86 */
321 PTR compat_sys_wait4
322 PTR sys_swapoff /* 4115 */
323 PTR sys32_sysinfo
324 PTR sys32_ipc
325 PTR sys_fsync
326 PTR sys32_sigreturn
327 PTR sys32_clone /* 4120 */
328 PTR sys_setdomainname
329 PTR sys32_newuname
330 PTR sys_ni_syscall /* sys_modify_ldt */
331 PTR sys32_adjtimex
332 PTR sys_mprotect /* 4125 */
333 PTR compat_sys_sigprocmask
334 PTR sys_ni_syscall /* was creat_module */
335 PTR sys_init_module
336 PTR sys_delete_module
337 PTR sys_ni_syscall /* 4130, get_kernel_syms */
338 PTR sys_quotactl
339 PTR sys_getpgid
340 PTR sys_fchdir
341 PTR sys_bdflush
342 PTR sys_sysfs /* 4135 */
343 PTR sys32_personality
344 PTR sys_ni_syscall /* for afs_syscall */
345 PTR sys_setfsuid
346 PTR sys_setfsgid
347 PTR sys32_llseek /* 4140 */
348 PTR compat_sys_getdents
349 PTR compat_sys_select
350 PTR sys_flock
351 PTR sys_msync
352 PTR compat_sys_readv /* 4145 */
353 PTR compat_sys_writev
354 PTR sys_cacheflush
355 PTR sys_cachectl
356 PTR sys_sysmips
357 PTR sys_ni_syscall /* 4150 */
358 PTR sys_getsid
359 PTR sys_fdatasync
360 PTR sys32_sysctl
361 PTR sys_mlock
362 PTR sys_munlock /* 4155 */
363 PTR sys_mlockall
364 PTR sys_munlockall
365 PTR sys_sched_setparam
366 PTR sys_sched_getparam
367 PTR sys_sched_setscheduler /* 4160 */
368 PTR sys_sched_getscheduler
369 PTR sys_sched_yield
370 PTR sys_sched_get_priority_max
371 PTR sys_sched_get_priority_min
372 PTR sys32_sched_rr_get_interval /* 4165 */
373 PTR compat_sys_nanosleep
374 PTR sys_mremap
375 PTR sys_accept
376 PTR sys_bind
377 PTR sys_connect /* 4170 */
378 PTR sys_getpeername
379 PTR sys_getsockname
380 PTR sys_getsockopt
381 PTR sys_listen
382 PTR sys_recv /* 4175 */
383 PTR sys_recvfrom
384 PTR compat_sys_recvmsg
385 PTR sys_send
386 PTR compat_sys_sendmsg
387 PTR sys_sendto /* 4180 */
388 PTR compat_sys_setsockopt
389 PTR sys_shutdown
390 PTR sys_socket
391 PTR sys_socketpair
392 PTR sys_setresuid /* 4185 */
393 PTR sys_getresuid
394 PTR sys_ni_syscall /* was query_module */
395 PTR sys_poll
396 PTR compat_sys_nfsservctl
397 PTR sys_setresgid /* 4190 */
398 PTR sys_getresgid
399 PTR sys_prctl
400 PTR sys32_rt_sigreturn
401 PTR sys32_rt_sigaction
402 PTR sys32_rt_sigprocmask /* 4195 */
403 PTR sys32_rt_sigpending
404 PTR compat_sys_rt_sigtimedwait
405 PTR sys32_rt_sigqueueinfo
406 PTR sys32_rt_sigsuspend
407 PTR sys32_pread /* 4200 */
408 PTR sys32_pwrite
409 PTR sys_chown
410 PTR sys_getcwd
411 PTR sys_capget
412 PTR sys_capset /* 4205 */
413 PTR sys32_sigaltstack
414 PTR sys32_sendfile
415 PTR sys_ni_syscall
416 PTR sys_ni_syscall
417 PTR sys32_mmap2 /* 4210 */
418 PTR sys32_truncate64
419 PTR sys32_ftruncate64
420 PTR sys_newstat
421 PTR sys_newlstat
422 PTR sys_newfstat /* 4215 */
423 PTR sys_pivot_root
424 PTR sys_mincore
425 PTR sys_madvise
426 PTR sys_getdents64
427 PTR compat_sys_fcntl64 /* 4220 */
428 PTR sys_ni_syscall
429 PTR sys_gettid
430 PTR sys32_readahead
431 PTR sys_setxattr
432 PTR sys_lsetxattr /* 4225 */
433 PTR sys_fsetxattr
434 PTR sys_getxattr
435 PTR sys_lgetxattr
436 PTR sys_fgetxattr
437 PTR sys_listxattr /* 4230 */
438 PTR sys_llistxattr
439 PTR sys_flistxattr
440 PTR sys_removexattr
441 PTR sys_lremovexattr
442 PTR sys_fremovexattr /* 4235 */
443 PTR sys_tkill
444 PTR sys_sendfile64
445 PTR compat_sys_futex
446 PTR compat_sys_sched_setaffinity
447 PTR compat_sys_sched_getaffinity /* 4240 */
448 PTR sys_io_setup
449 PTR sys_io_destroy
450 PTR sys_io_getevents
451 PTR sys_io_submit
452 PTR sys_io_cancel /* 4245 */
453 PTR sys_exit_group
454 PTR sys_lookup_dcookie
455 PTR sys_epoll_create
456 PTR sys_epoll_ctl
457 PTR sys_epoll_wait /* 4250 */
458 PTR sys_remap_file_pages
459 PTR sys_set_tid_address
460 PTR sys_restart_syscall
461 PTR sys_fadvise64_64
462 PTR compat_sys_statfs64 /* 4255 */
463 PTR compat_sys_fstatfs64
464 PTR sys32_timer_create
465 PTR compat_sys_timer_settime
466 PTR compat_sys_timer_gettime
467 PTR sys_timer_getoverrun /* 4260 */
468 PTR sys_timer_delete
469 PTR compat_sys_clock_settime
470 PTR compat_sys_clock_gettime
471 PTR compat_sys_clock_getres
472 PTR compat_sys_clock_nanosleep /* 4265 */
473 PTR sys_tgkill
474 PTR compat_sys_utimes
475 PTR sys_ni_syscall /* sys_mbind */
476 PTR sys_ni_syscall /* sys_get_mempolicy */
477 PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
478 PTR compat_sys_mq_open
479 PTR sys_mq_unlink
480 PTR compat_sys_mq_timedsend
481 PTR compat_sys_mq_timedreceive
482 PTR compat_sys_mq_notify /* 4275 */
483 PTR compat_sys_mq_getsetattr
484 PTR sys_ni_syscall /* sys_vserver */
485 PTR sys32_waitid
486 PTR sys_ni_syscall /* available, was setaltroot */
487 PTR sys_add_key /* 4280 */
488 PTR sys_request_key
489 PTR sys_keyctl
490 PTR sys_set_thread_area
491 PTR sys_inotify_init
492 PTR sys_inotify_add_watch /* 4285 */
493 PTR sys_inotify_rm_watch
494 PTR sys_migrate_pages
495 PTR compat_sys_openat
496 PTR sys_mkdirat
497 PTR sys_mknodat /* 4290 */
498 PTR sys_fchownat
499 PTR compat_sys_futimesat
500 PTR compat_sys_newfstatat
501 PTR sys_unlinkat
502 PTR sys_renameat /* 4295 */
503 PTR sys_linkat
504 PTR sys_symlinkat
505 PTR sys_readlinkat
506 PTR sys_fchmodat
507 PTR sys_faccessat /* 4300 */
508 PTR sys_pselect6
509 PTR sys_ppoll
510 PTR sys_unshare
511 .size sys_call_table,.-sys_call_table