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1da177e4 LT |
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> | |
26 | ||
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 | |
34 | ||
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 | |
46 | ||
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 | |
53 | ||
54 | dsll t0, v0, 3 # offset into table | |
55 | ld t2, (sys_call_table - (__NR_O32_Linux * 8))(t0) | |
56 | ||
57 | sd a3, PT_R26(sp) # save a3 for syscall restarting | |
58 | ||
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 | |
70 | ||
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) | |
75 | ||
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 | |
82 | ||
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 | |
87 | ||
88 | jalr t2 # Do The Real Thing (TM) | |
89 | ||
90 | li t0, -EMAXERRNO - 1 # error? | |
91 | sltu t0, t0, v0 | |
92 | sd t0, PT_R7(sp) # set error flag | |
93 | beqz t0, 1f | |
94 | ||
95 | dnegu v0 # error | |
96 | sd v0, PT_R0(sp) # flag for syscall restarting | |
97 | 1: sd v0, PT_R2(sp) # result | |
98 | ||
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 | |
107 | ||
108 | j restore_partial | |
109 | ||
110 | o32_syscall_exit_work: | |
111 | j syscall_exit_work_partial | |
112 | ||
113 | /* ------------------------------------------------------------------------ */ | |
114 | ||
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 | |
121 | ||
122 | move s0, t2 # Save syscall pointer | |
123 | move a0, sp | |
124 | li a1, 0 | |
125 | jal do_syscall_trace | |
126 | ||
127 | ld a0, PT_R4(sp) # Restore argument registers | |
128 | ld a1, PT_R5(sp) | |
129 | ld a2, PT_R6(sp) | |
130 | ld a3, PT_R7(sp) | |
131 | ld a4, PT_R8(sp) | |
132 | ld a5, PT_R9(sp) | |
133 | ld a6, PT_R10(sp) | |
134 | ld a7, PT_R11(sp) # For indirect syscalls | |
135 | jalr s0 | |
136 | ||
137 | li t0, -EMAXERRNO - 1 # error? | |
138 | sltu t0, t0, v0 | |
139 | sd t0, PT_R7(sp) # set error flag | |
140 | beqz t0, 1f | |
141 | ||
142 | dnegu v0 # error | |
143 | sd v0, PT_R0(sp) # set flag for syscall restarting | |
144 | 1: sd v0, PT_R2(sp) # result | |
145 | ||
146 | j syscall_exit | |
147 | ||
148 | /* ------------------------------------------------------------------------ */ | |
149 | ||
150 | /* | |
151 | * The stackpointer for a call with more than 4 arguments is bad. | |
152 | */ | |
153 | bad_stack: | |
154 | dnegu v0 # error | |
155 | sd v0, PT_R0(sp) | |
156 | sd v0, PT_R2(sp) | |
157 | li t0, 1 # set error flag | |
158 | sd t0, PT_R7(sp) | |
159 | j o32_syscall_exit | |
160 | ||
161 | not_o32_scall: | |
162 | /* | |
163 | * This is not an o32 compatibility syscall, pass it on | |
164 | * to the 64-bit syscall handlers. | |
165 | */ | |
166 | #ifdef CONFIG_MIPS32_N32 | |
167 | j handle_sysn32 | |
168 | #else | |
169 | j handle_sys64 | |
170 | #endif | |
171 | END(handle_sys) | |
172 | ||
173 | LEAF(sys32_syscall) | |
174 | sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1 | |
175 | beqz v0, einval | |
176 | ||
177 | dsll v0, a0, 3 | |
178 | ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0) | |
179 | ||
180 | li v1, 4000 # indirect syscall number | |
181 | beq a0, v1, einval # do not recurse | |
182 | ||
183 | move a0, a1 # shift argument registers | |
184 | move a1, a2 | |
185 | move a2, a3 | |
186 | move a3, a4 | |
187 | move a4, a5 | |
188 | move a5, a6 | |
189 | move a6, a7 | |
190 | sd a0, PT_R4(sp) # ... and push back a0 - a3, some | |
191 | sd a1, PT_R5(sp) # syscalls expect them there | |
192 | sd a2, PT_R6(sp) | |
193 | sd a3, PT_R7(sp) | |
194 | sd a3, PT_R26(sp) # update a3 for syscall restarting | |
195 | jr t2 | |
196 | /* Unreached */ | |
197 | ||
198 | einval: li v0, -EINVAL | |
199 | jr ra | |
200 | END(sys32_syscall) | |
201 | ||
202 | .align 3 | |
203 | .type sys_call_table,@object | |
204 | sys_call_table: | |
205 | PTR sys32_syscall /* 4000 */ | |
206 | PTR sys_exit | |
207 | PTR sys_fork | |
208 | PTR sys_read | |
209 | PTR sys_write | |
210 | PTR sys_open /* 4005 */ | |
211 | PTR sys_close | |
212 | PTR sys_waitpid | |
213 | PTR sys_creat | |
214 | PTR sys_link | |
215 | PTR sys_unlink /* 4010 */ | |
216 | PTR sys32_execve | |
217 | PTR sys_chdir | |
218 | PTR compat_sys_time | |
219 | PTR sys_mknod | |
220 | PTR sys_chmod /* 4015 */ | |
221 | PTR sys_lchown | |
222 | PTR sys_ni_syscall | |
223 | PTR sys_ni_syscall /* was sys_stat */ | |
224 | PTR sys_lseek | |
225 | PTR sys_getpid /* 4020 */ | |
226 | PTR sys_mount | |
227 | PTR sys_oldumount | |
228 | PTR sys_setuid | |
229 | PTR sys_getuid | |
230 | PTR compat_sys_stime /* 4025 */ | |
231 | PTR sys32_ptrace | |
232 | PTR sys_alarm | |
233 | PTR sys_ni_syscall /* was sys_fstat */ | |
234 | PTR sys_pause | |
235 | PTR compat_sys_utime /* 4030 */ | |
236 | PTR sys_ni_syscall | |
237 | PTR sys_ni_syscall | |
238 | PTR sys_access | |
239 | PTR sys_nice | |
240 | PTR sys_ni_syscall /* 4035 */ | |
241 | PTR sys_sync | |
242 | PTR sys_kill | |
243 | PTR sys_rename | |
244 | PTR sys_mkdir | |
245 | PTR sys_rmdir /* 4040 */ | |
246 | PTR sys_dup | |
247 | PTR sys_pipe | |
248 | PTR compat_sys_times | |
249 | PTR sys_ni_syscall | |
250 | PTR sys_brk /* 4045 */ | |
251 | PTR sys_setgid | |
252 | PTR sys_getgid | |
253 | PTR sys_ni_syscall /* was signal 2 */ | |
254 | PTR sys_geteuid | |
255 | PTR sys_getegid /* 4050 */ | |
256 | PTR sys_acct | |
257 | PTR sys_umount | |
258 | PTR sys_ni_syscall | |
259 | PTR compat_sys_ioctl | |
260 | PTR compat_sys_fcntl /* 4055 */ | |
261 | PTR sys_ni_syscall | |
262 | PTR sys_setpgid | |
263 | PTR sys_ni_syscall | |
264 | PTR sys_olduname | |
265 | PTR sys_umask /* 4060 */ | |
266 | PTR sys_chroot | |
267 | PTR sys32_ustat | |
268 | PTR sys_dup2 | |
269 | PTR sys_getppid | |
270 | PTR sys_getpgrp /* 4065 */ | |
271 | PTR sys_setsid | |
272 | PTR sys32_sigaction | |
273 | PTR sys_sgetmask | |
274 | PTR sys_ssetmask | |
275 | PTR sys_setreuid /* 4070 */ | |
276 | PTR sys_setregid | |
277 | PTR sys32_sigsuspend | |
278 | PTR compat_sys_sigpending | |
279 | PTR sys_sethostname | |
280 | PTR compat_sys_setrlimit /* 4075 */ | |
281 | PTR compat_sys_getrlimit | |
282 | PTR compat_sys_getrusage | |
283 | PTR sys32_gettimeofday | |
284 | PTR sys32_settimeofday | |
285 | PTR sys_getgroups /* 4080 */ | |
286 | PTR sys_setgroups | |
287 | PTR sys_ni_syscall /* old_select */ | |
288 | PTR sys_symlink | |
289 | PTR sys_ni_syscall /* was sys_lstat */ | |
290 | PTR sys_readlink /* 4085 */ | |
291 | PTR sys_uselib | |
292 | PTR sys_swapon | |
293 | PTR sys_reboot | |
294 | PTR sys32_readdir | |
295 | PTR old_mmap /* 4090 */ | |
296 | PTR sys_munmap | |
297 | PTR sys_truncate | |
298 | PTR sys_ftruncate | |
299 | PTR sys_fchmod | |
300 | PTR sys_fchown /* 4095 */ | |
301 | PTR sys_getpriority | |
302 | PTR sys_setpriority | |
303 | PTR sys_ni_syscall | |
304 | PTR compat_sys_statfs | |
305 | PTR compat_sys_fstatfs /* 4100 */ | |
306 | PTR sys_ni_syscall /* sys_ioperm */ | |
307 | PTR sys32_socketcall | |
308 | PTR sys_syslog | |
309 | PTR compat_sys_setitimer | |
310 | PTR compat_sys_getitimer /* 4105 */ | |
311 | PTR compat_sys_newstat | |
312 | PTR compat_sys_newlstat | |
313 | PTR compat_sys_newfstat | |
314 | PTR sys_uname | |
315 | PTR sys_ni_syscall /* sys_ioperm *//* 4110 */ | |
316 | PTR sys_vhangup | |
317 | PTR sys_ni_syscall /* was sys_idle */ | |
318 | PTR sys_ni_syscall /* sys_vm86 */ | |
b6e203d8 | 319 | PTR compat_sys_wait4 |
1da177e4 LT |
320 | PTR sys_swapoff /* 4115 */ |
321 | PTR sys32_sysinfo | |
322 | PTR sys32_ipc | |
323 | PTR sys_fsync | |
324 | PTR sys32_sigreturn | |
325 | PTR sys_clone /* 4120 */ | |
326 | PTR sys_setdomainname | |
327 | PTR sys32_newuname | |
328 | PTR sys_ni_syscall /* sys_modify_ldt */ | |
329 | PTR sys32_adjtimex | |
330 | PTR sys_mprotect /* 4125 */ | |
331 | PTR compat_sys_sigprocmask | |
332 | PTR sys_ni_syscall /* was creat_module */ | |
333 | PTR sys_init_module | |
334 | PTR sys_delete_module | |
335 | PTR sys_ni_syscall /* 4130, get_kernel_syms */ | |
336 | PTR sys_quotactl | |
337 | PTR sys_getpgid | |
338 | PTR sys_fchdir | |
339 | PTR sys_bdflush | |
340 | PTR sys_sysfs /* 4135 */ | |
341 | PTR sys32_personality | |
342 | PTR sys_ni_syscall /* for afs_syscall */ | |
343 | PTR sys_setfsuid | |
344 | PTR sys_setfsgid | |
345 | PTR sys32_llseek /* 4140 */ | |
346 | PTR sys32_getdents | |
347 | PTR compat_sys_select | |
348 | PTR sys_flock | |
349 | PTR sys_msync | |
350 | PTR compat_sys_readv /* 4145 */ | |
351 | PTR compat_sys_writev | |
352 | PTR sys_cacheflush | |
353 | PTR sys_cachectl | |
354 | PTR sys_sysmips | |
355 | PTR sys_ni_syscall /* 4150 */ | |
356 | PTR sys_getsid | |
357 | PTR sys_fdatasync | |
358 | PTR sys32_sysctl | |
359 | PTR sys_mlock | |
360 | PTR sys_munlock /* 4155 */ | |
361 | PTR sys_mlockall | |
362 | PTR sys_munlockall | |
363 | PTR sys_sched_setparam | |
364 | PTR sys_sched_getparam | |
365 | PTR sys_sched_setscheduler /* 4160 */ | |
366 | PTR sys_sched_getscheduler | |
367 | PTR sys_sched_yield | |
368 | PTR sys_sched_get_priority_max | |
369 | PTR sys_sched_get_priority_min | |
370 | PTR sys32_sched_rr_get_interval /* 4165 */ | |
371 | PTR compat_sys_nanosleep | |
372 | PTR sys_mremap | |
373 | PTR sys_accept | |
374 | PTR sys_bind | |
375 | PTR sys_connect /* 4170 */ | |
376 | PTR sys_getpeername | |
377 | PTR sys_getsockname | |
378 | PTR sys_getsockopt | |
379 | PTR sys_listen | |
380 | PTR sys_recv /* 4175 */ | |
381 | PTR sys_recvfrom | |
382 | PTR compat_sys_recvmsg | |
383 | PTR sys_send | |
384 | PTR compat_sys_sendmsg | |
385 | PTR sys_sendto /* 4180 */ | |
386 | PTR compat_sys_setsockopt | |
387 | PTR sys_shutdown | |
388 | PTR sys_socket | |
389 | PTR sys_socketpair | |
390 | PTR sys_setresuid /* 4185 */ | |
391 | PTR sys_getresuid | |
392 | PTR sys_ni_syscall /* was query_module */ | |
393 | PTR sys_poll | |
394 | PTR sys_nfsservctl | |
395 | PTR sys_setresgid /* 4190 */ | |
396 | PTR sys_getresgid | |
397 | PTR sys_prctl | |
398 | PTR sys32_rt_sigreturn | |
399 | PTR sys32_rt_sigaction | |
400 | PTR sys32_rt_sigprocmask /* 4195 */ | |
401 | PTR sys32_rt_sigpending | |
402 | PTR compat_sys_rt_sigtimedwait | |
403 | PTR sys32_rt_sigqueueinfo | |
404 | PTR sys32_rt_sigsuspend | |
405 | PTR sys32_pread /* 4200 */ | |
406 | PTR sys32_pwrite | |
407 | PTR sys_chown | |
408 | PTR sys_getcwd | |
409 | PTR sys_capget | |
410 | PTR sys_capset /* 4205 */ | |
411 | PTR sys32_sigaltstack | |
412 | PTR sys32_sendfile | |
413 | PTR sys_ni_syscall | |
414 | PTR sys_ni_syscall | |
415 | PTR sys32_mmap2 /* 4210 */ | |
416 | PTR sys32_truncate64 | |
417 | PTR sys32_ftruncate64 | |
418 | PTR sys_newstat | |
419 | PTR sys_newlstat | |
420 | PTR sys_newfstat /* 4215 */ | |
421 | PTR sys_pivot_root | |
422 | PTR sys_mincore | |
423 | PTR sys_madvise | |
424 | PTR sys_getdents64 | |
425 | PTR compat_sys_fcntl64 /* 4220 */ | |
426 | PTR sys_ni_syscall | |
427 | PTR sys_gettid | |
428 | PTR sys32_readahead | |
429 | PTR sys_setxattr | |
430 | PTR sys_lsetxattr /* 4225 */ | |
431 | PTR sys_fsetxattr | |
432 | PTR sys_getxattr | |
433 | PTR sys_lgetxattr | |
434 | PTR sys_fgetxattr | |
435 | PTR sys_listxattr /* 4230 */ | |
436 | PTR sys_llistxattr | |
437 | PTR sys_flistxattr | |
438 | PTR sys_removexattr | |
439 | PTR sys_lremovexattr | |
440 | PTR sys_fremovexattr /* 4235 */ | |
441 | PTR sys_tkill | |
442 | PTR sys_sendfile64 | |
443 | PTR compat_sys_futex | |
444 | PTR compat_sys_sched_setaffinity | |
445 | PTR compat_sys_sched_getaffinity /* 4240 */ | |
446 | PTR sys_io_setup | |
447 | PTR sys_io_destroy | |
448 | PTR sys_io_getevents | |
449 | PTR sys_io_submit | |
450 | PTR sys_io_cancel /* 4245 */ | |
451 | PTR sys_exit_group | |
452 | PTR sys_lookup_dcookie | |
453 | PTR sys_epoll_create | |
454 | PTR sys_epoll_ctl | |
455 | PTR sys_epoll_wait /* 4250 */ | |
456 | PTR sys_remap_file_pages | |
457 | PTR sys_set_tid_address | |
458 | PTR sys_restart_syscall | |
459 | PTR sys_fadvise64_64 | |
460 | PTR compat_sys_statfs64 /* 4255 */ | |
461 | PTR compat_sys_fstatfs64 | |
d1abb6a2 | 462 | PTR sys32_timer_create |
1da177e4 LT |
463 | PTR compat_sys_timer_settime |
464 | PTR compat_sys_timer_gettime | |
465 | PTR sys_timer_getoverrun /* 4260 */ | |
466 | PTR sys_timer_delete | |
467 | PTR compat_sys_clock_settime | |
468 | PTR compat_sys_clock_gettime | |
469 | PTR compat_sys_clock_getres | |
470 | PTR compat_sys_clock_nanosleep /* 4265 */ | |
471 | PTR sys_tgkill | |
472 | PTR compat_sys_utimes | |
473 | PTR sys_ni_syscall /* sys_mbind */ | |
474 | PTR sys_ni_syscall /* sys_get_mempolicy */ | |
475 | PTR sys_ni_syscall /* 4270 sys_set_mempolicy */ | |
476 | PTR compat_sys_mq_open | |
477 | PTR sys_mq_unlink | |
478 | PTR compat_sys_mq_timedsend | |
479 | PTR compat_sys_mq_timedreceive | |
480 | PTR compat_sys_mq_notify /* 4275 */ | |
481 | PTR compat_sys_mq_getsetattr | |
482 | PTR sys_ni_syscall /* sys_vserver */ | |
54f2da75 | 483 | PTR sys32_waitid |
1da177e4 LT |
484 | PTR sys_ni_syscall /* available, was setaltroot */ |
485 | PTR sys_add_key /* 4280 */ | |
486 | PTR sys_request_key | |
487 | PTR sys_keyctl | |
488 | .size sys_call_table,.-sys_call_table |