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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / b6e203d84da8298b903a0ebcad1a8170f3959b4f / . / arch / mips / kernel / scall64-o32.S
blob: 271b2cb14da0a0114ef2c3f375dd4b4cb817cc6a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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
28NESTED(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
711: lw a4, 16(t0) # argument #5 from usp
722: lw a5, 20(t0) # argument #6 from usp
733: lw a6, 24(t0) # argument #7 from usp
744: 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
971: sd v0, PT_R2(sp) # result
98
99o32_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
110o32_syscall_exit_work:
111 j syscall_exit_work_partial
112
113/* ------------------------------------------------------------------------ */
114
115trace_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
1441: 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 */
153bad_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
161not_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
173LEAF(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
198einval: li v0, -EINVAL
199 jr ra
200 END(sys32_syscall)
201
202 .align 3
203 .type sys_call_table,@object
204sys_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 */
Ralf Baechleb6e203d2005-02-16 21:18:52 +0000[diff] [blame^]319 PTR compat_sys_wait4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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
462 PTR sys_timer_create
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 */
483 PTR sys_waitid
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