summaryrefslogtreecommitdiffstats
path: root/arch/mips/kernel/scall64-n32.S
blob: 44337ba03717a573119659fcc94fec11c9564b61 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01 by Ralf Baechle
 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
 * Copyright (C) 2001 MIPS Technologies, Inc.
 */
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/thread_info.h>
#include <asm/unistd.h>

/* This duplicates the definition from <linux/sched.h> */
#define PT_TRACESYS	0x00000002	/* tracing system calls */

/* This duplicates the definition from <asm/signal.h> */
#define SIGILL		4		/* Illegal instruction (ANSI).  */

#ifndef CONFIG_MIPS32_O32
/* No O32, so define handle_sys here */
#define handle_sysn32 handle_sys
#endif

	.align  5
NESTED(handle_sysn32, PT_SIZE, sp)
#ifndef CONFIG_MIPS32_O32
	.set	noat
	SAVE_SOME
	TRACE_IRQS_ON_RELOAD
	STI
	.set	at
#endif

	dsubu	t0, v0, __NR_N32_Linux	# check syscall number
	sltiu	t0, t0,	__NR_N32_Linux_syscalls + 1

#ifndef CONFIG_MIPS32_O32
	ld	t1, PT_EPC(sp)		# skip syscall on return
	daddiu	t1, 4			# skip to next instruction
	sd	t1, PT_EPC(sp)
#endif
	beqz	t0, not_n32_scall

	dsll	t0, v0, 3		# offset into table
	ld	t2, (sysn32_call_table - (__NR_N32_Linux * 8))(t0)

	sd	a3, PT_R26(sp)		# save a3 for syscall restarting

	li	t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
	LONG_L	t0, TI_FLAGS($28)	# syscall tracing enabled?
	and	t0, t1, t0
	bnez	t0, n32_syscall_trace_entry

	jalr	t2			# Do The Real Thing (TM)

	li	t0, -EMAXERRNO - 1	# error?
	sltu	t0, t0, v0
	sd	t0, PT_R7(sp)		# set error flag
	beqz	t0, 1f

	dnegu	v0			# error
	sd	v0, PT_R0(sp)		# set flag for syscall restarting
1:	sd	v0, PT_R2(sp)		# result

	local_irq_disable		# make sure need_resched and
					# signals dont change between
					# sampling and return
	LONG_L  a2, TI_FLAGS($28)	# current->work
	li	t0, _TIF_ALLWORK_MASK
	and	t0, a2, t0
	bnez	t0, n32_syscall_exit_work

	j	restore_partial

n32_syscall_exit_work:
	j	syscall_exit_work_partial

/* ------------------------------------------------------------------------ */

n32_syscall_trace_entry:
	SAVE_STATIC
	move	s0, t2
	move	a0, sp
	li	a1, 0
	jal	do_syscall_trace

	move	t0, s0
	RESTORE_STATIC
	ld	a0, PT_R4(sp)		# Restore argument registers
	ld	a1, PT_R5(sp)
	ld	a2, PT_R6(sp)
	ld	a3, PT_R7(sp)
	ld	a4, PT_R8(sp)
	ld	a5, PT_R9(sp)
	jalr	t0

	li	t0, -EMAXERRNO - 1	# error?
	sltu	t0, t0, v0
	sd	t0, PT_R7(sp)		# set error flag
	beqz	t0, 1f

	dnegu	v0			# error
	sd	v0, PT_R0(sp)		# set flag for syscall restarting
1:	sd	v0, PT_R2(sp)		# result

	j	syscall_exit

not_n32_scall:
	/* This is not an n32 compatibility syscall, pass it on to
	   the n64 syscall handlers.  */
	j	handle_sys64

	END(handle_sysn32)

EXPORT(sysn32_call_table)
	PTR	sys_read			/* 6000 */
	PTR	sys_write
	PTR	sys_open
	PTR	sys_close
	PTR	sys_newstat
	PTR	sys_newfstat			/* 6005 */
	PTR	sys_newlstat
	PTR	sys_poll
	PTR	sys_lseek
	PTR	sys_mips_mmap
	PTR	sys_mprotect			/* 6010 */
	PTR	sys_munmap
	PTR	sys_brk
	PTR	sys_32_rt_sigaction
	PTR	sys_32_rt_sigprocmask
	PTR	compat_sys_ioctl		/* 6015 */
	PTR	sys_pread64
	PTR	sys_pwrite64
	PTR	compat_sys_readv
	PTR	compat_sys_writev
	PTR	sys_access			/* 6020 */
	PTR	sysm_pipe
	PTR	compat_sys_select
	PTR	sys_sched_yield
	PTR	sys_mremap
	PTR	sys_msync			/* 6025 */
	PTR	sys_mincore
	PTR	sys_madvise
	PTR	sys_shmget
	PTR	sys_shmat
	PTR	compat_sys_shmctl			/* 6030 */
	PTR	sys_dup
	PTR	sys_dup2
	PTR	sys_pause
	PTR	compat_sys_nanosleep
	PTR	compat_sys_getitimer		/* 6035 */
	PTR	compat_sys_setitimer
	PTR	sys_alarm
	PTR	sys_getpid
	PTR	sys_32_sendfile
	PTR	sys_socket			/* 6040 */
	PTR	sys_connect
	PTR	sys_accept
	PTR	sys_sendto
	PTR	compat_sys_recvfrom
	PTR	compat_sys_sendmsg		/* 6045 */
	PTR	compat_sys_recvmsg
	PTR	sys_shutdown
	PTR	sys_bind
	PTR	sys_listen
	PTR	sys_getsockname			/* 6050 */
	PTR	sys_getpeername
	PTR	sys_socketpair
	PTR	compat_sys_setsockopt
	PTR	sys_getsockopt
	PTR	sys_clone			/* 6055 */
	PTR	sys_fork
	PTR	sys32_execve
	PTR	sys_exit
	PTR	compat_sys_wait4
	PTR	sys_kill			/* 6060 */
	PTR	sys_newuname
	PTR	sys_semget
	PTR	sys_semop
	PTR	sys_n32_semctl
	PTR	sys_shmdt			/* 6065 */
	PTR	sys_msgget
	PTR	sys_n32_msgsnd
	PTR	sys_n32_msgrcv
	PTR	compat_sys_msgctl
	PTR	compat_sys_fcntl		/* 6070 */
	PTR	sys_flock
	PTR	sys_fsync
	PTR	sys_fdatasync
	PTR	sys_truncate
	PTR	sys_ftruncate			/* 6075 */
	PTR	compat_sys_getdents
	PTR	sys_getcwd
	PTR	sys_chdir
	PTR	sys_fchdir
	PTR	sys_rename			/* 6080 */
	PTR	sys_mkdir
	PTR	sys_rmdir
	PTR	sys_creat
	PTR	sys_link
	PTR	sys_unlink			/* 6085 */
	PTR	sys_symlink
	PTR	sys_readlink
	PTR	sys_chmod
	PTR	sys_fchmod
	PTR	sys_chown			/* 6090 */
	PTR	sys_fchown
	PTR	sys_lchown
	PTR	sys_umask
	PTR	compat_sys_gettimeofday
	PTR	compat_sys_getrlimit		/* 6095 */
	PTR	compat_sys_getrusage
	PTR	compat_sys_sysinfo
	PTR	compat_sys_times
	PTR	compat_sys_ptrace
	PTR	sys_getuid			/* 6100 */
	PTR	sys_syslog
	PTR	sys_getgid
	PTR	sys_setuid
	PTR	sys_setgid
	PTR	sys_geteuid			/* 6105 */
	PTR	sys_getegid
	PTR	sys_setpgid
	PTR	sys_getppid
	PTR	sys_getpgrp
	PTR	sys_setsid			/* 6110 */
	PTR	sys_setreuid
	PTR	sys_setregid
	PTR	sys_getgroups
	PTR	sys_setgroups
	PTR	sys_setresuid			/* 6115 */
	PTR	sys_getresuid
	PTR	sys_setresgid
	PTR	sys_getresgid
	PTR	sys_getpgid
	PTR	sys_setfsuid			/* 6120 */
	PTR	sys_setfsgid
	PTR	sys_getsid
	PTR	sys_capget
	PTR	sys_capset
	PTR	sys_32_rt_sigpending		/* 6125 */
	PTR	compat_sys_rt_sigtimedwait
	PTR	sys_32_rt_sigqueueinfo
	PTR	sysn32_rt_sigsuspend
	PTR	sys32_sigaltstack
	PTR	compat_sys_utime		/* 6130 */
	PTR	sys_mknod
	PTR	sys_32_personality
	PTR	compat_sys_ustat
	PTR	compat_sys_statfs
	PTR	compat_sys_fstatfs		/* 6135 */
	PTR	sys_sysfs
	PTR	sys_getpriority
	PTR	sys_setpriority
	PTR	sys_sched_setparam
	PTR	sys_sched_getparam		/* 6140 */
	PTR	sys_sched_setscheduler
	PTR	sys_sched_getscheduler
	PTR	sys_sched_get_priority_max
	PTR	sys_sched_get_priority_min
	PTR	sys_32_sched_rr_get_interval	/* 6145 */
	PTR	sys_mlock
	PTR	sys_munlock
	PTR	sys_mlockall
	PTR	sys_munlockall
	PTR	sys_vhangup			/* 6150 */
	PTR	sys_pivot_root
	PTR	compat_sys_sysctl
	PTR	sys_prctl
	PTR	compat_sys_adjtimex
	PTR	compat_sys_setrlimit		/* 6155 */
	PTR	sys_chroot
	PTR	sys_sync
	PTR	sys_acct
	PTR	compat_sys_settimeofday
	PTR	compat_sys_mount		/* 6160 */
	PTR	sys_umount
	PTR	sys_swapon
	PTR	sys_swapoff
	PTR	sys_reboot
	PTR	sys_sethostname			/* 6165 */
	PTR	sys_setdomainname
	PTR	sys_ni_syscall			/* was create_module */
	PTR	sys_init_module
	PTR	sys_delete_module
	PTR	sys_ni_syscall			/* 6170, was get_kernel_syms */
	PTR	sys_ni_syscall			/* was query_module */
	PTR	sys_quotactl
	PTR	compat_sys_nfsservctl
	PTR	sys_ni_syscall			/* res. for getpmsg */
	PTR	sys_ni_syscall			/* 6175  for putpmsg */
	PTR	sys_ni_syscall			/* res. for afs_syscall */
	PTR	sys_ni_syscall			/* res. for security */
	PTR	sys_gettid
	PTR	sys_readahead
	PTR	sys_setxattr			/* 6180 */
	PTR	sys_lsetxattr
	PTR	sys_fsetxattr
	PTR	sys_getxattr
	PTR	sys_lgetxattr
	PTR	sys_fgetxattr			/* 6185 */
	PTR	sys_listxattr
	PTR	sys_llistxattr
	PTR	sys_flistxattr
	PTR	sys_removexattr
	PTR	sys_lremovexattr		/* 6190 */
	PTR	sys_fremovexattr
	PTR	sys_tkill
	PTR	sys_ni_syscall
	PTR	compat_sys_futex
	PTR	compat_sys_sched_setaffinity	/* 6195 */
	PTR	compat_sys_sched_getaffinity
	PTR	sys_cacheflush
	PTR	sys_cachectl
	PTR	sys_sysmips
	PTR	sys_io_setup			/* 6200 */
	PTR	sys_io_destroy
	PTR	sys_io_getevents
	PTR	sys_io_submit
	PTR	sys_io_cancel
	PTR	sys_exit_group			/* 6205 */
	PTR	sys_lookup_dcookie
	PTR	sys_epoll_create
	PTR	sys_epoll_ctl
	PTR	sys_epoll_wait
	PTR	sys_remap_file_pages		/* 6210 */
	PTR	sysn32_rt_sigreturn
	PTR	compat_sys_fcntl64
	PTR	sys_set_tid_address
	PTR	sys_restart_syscall
	PTR	compat_sys_semtimedop			/* 6215 */
	PTR	sys_fadvise64_64
	PTR	compat_sys_statfs64
	PTR	compat_sys_fstatfs64
	PTR	sys_sendfile64
	PTR	compat_sys_timer_create		/* 6220 */
	PTR	compat_sys_timer_settime
	PTR	compat_sys_timer_gettime
	PTR	sys_timer_getoverrun
	PTR	sys_timer_delete
	PTR	compat_sys_clock_settime		/* 6225 */
	PTR	compat_sys_clock_gettime
	PTR	compat_sys_clock_getres
	PTR	compat_sys_clock_nanosleep
	PTR	sys_tgkill
	PTR	compat_sys_utimes		/* 6230 */
	PTR	sys_ni_syscall			/* sys_mbind */
	PTR	sys_ni_syscall			/* sys_get_mempolicy */
	PTR	sys_ni_syscall			/* sys_set_mempolicy */
	PTR	compat_sys_mq_open
	PTR	sys_mq_unlink			/* 6235 */
	PTR	compat_sys_mq_timedsend
	PTR	compat_sys_mq_timedreceive
	PTR	compat_sys_mq_notify
	PTR	compat_sys_mq_getsetattr
	PTR	sys_ni_syscall			/* 6240, sys_vserver */
	PTR	compat_sys_waitid
	PTR	sys_ni_syscall			/* available, was setaltroot */
	PTR	sys_add_key
	PTR	sys_request_key
	PTR	sys_keyctl			/* 6245 */
	PTR	sys_set_thread_area
	PTR	sys_inotify_init
	PTR	sys_inotify_add_watch
	PTR	sys_inotify_rm_watch
	PTR	sys_migrate_pages		/* 6250 */
	PTR	sys_openat
	PTR	sys_mkdirat
	PTR	sys_mknodat
	PTR	sys_fchownat
	PTR	compat_sys_futimesat		/* 6255 */
	PTR	sys_newfstatat
	PTR	sys_unlinkat
	PTR	sys_renameat
	PTR	sys_linkat
	PTR	sys_symlinkat			/* 6260 */
	PTR	sys_readlinkat
	PTR	sys_fchmodat
	PTR	sys_faccessat
	PTR	compat_sys_pselect6
	PTR	sys_ppoll			/* 6265 */
	PTR	sys_unshare
	PTR	sys_splice
	PTR	sys_sync_file_range
	PTR	sys_tee
	PTR	compat_sys_vmsplice		/* 6270 */
	PTR	sys_move_pages
	PTR	compat_sys_set_robust_list
	PTR	compat_sys_get_robust_list
	PTR	compat_sys_kexec_load
	PTR	sys_getcpu			/* 6275 */
	PTR	compat_sys_epoll_pwait
	PTR	sys_ioprio_set
	PTR	sys_ioprio_get
	PTR	compat_sys_utimensat
	PTR	compat_sys_signalfd		/* 5280 */
	PTR	sys_ni_syscall
	PTR	sys_eventfd
	PTR	sys_fallocate
	PTR	sys_timerfd_create
	PTR	compat_sys_timerfd_gettime	/* 5285 */
	PTR	compat_sys_timerfd_settime
	PTR	sys_signalfd4
	PTR	sys_eventfd2
	PTR	sys_epoll_create1
	PTR	sys_dup3			/* 5290 */
	PTR	sys_pipe2
	PTR	sys_inotify_init1
	PTR	sys_preadv
	PTR	sys_pwritev
	PTR	compat_sys_rt_tgsigqueueinfo	/* 5295 */
	PTR	sys_perf_event_open
	PTR	sys_accept4
	PTR     compat_sys_recvmmsg
	.size	sysn32_call_table,.-sysn32_call_table