aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-xtensa/unistd.h
blob: 6b39d6609d9c0c0fd2be7d05011e137ee73a631a (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
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
/*
 * include/asm-xtensa/unistd.h
 *
 * 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) 2001 - 2005 Tensilica Inc.
 */

#ifndef _XTENSA_UNISTD_H
#define _XTENSA_UNISTD_H

#include <linux/linkage.h>

#define __NR_spill		  0
#define __NR_exit		  1
#define __NR_read		  3
#define __NR_write		  4
#define __NR_open		  5
#define __NR_close		  6
#define __NR_creat		  8
#define __NR_link		  9
#define __NR_unlink		 10
#define __NR_execve		 11
#define __NR_chdir		 12
#define __NR_mknod		 14
#define __NR_chmod		 15
#define __NR_lchown		 16
#define __NR_break		 17
#define __NR_lseek		 19
#define __NR_getpid		 20
#define __NR_mount		 21
#define __NR_setuid		 23
#define __NR_getuid		 24
#define __NR_ptrace		 26
#define __NR_utime		 30
#define __NR_stty		 31
#define __NR_gtty		 32
#define __NR_access		 33
#define __NR_ftime		 35
#define __NR_sync		 36
#define __NR_kill		 37
#define __NR_rename		 38
#define __NR_mkdir		 39
#define __NR_rmdir		 40
#define __NR_dup		 41
#define __NR_pipe		 42
#define __NR_times		 43
#define __NR_prof		 44
#define __NR_brk		 45
#define __NR_setgid		 46
#define __NR_getgid		 47
#define __NR_signal		 48
#define __NR_geteuid		 49
#define __NR_getegid		 50
#define __NR_acct		 51
#define __NR_lock		 53
#define __NR_ioctl		 54
#define __NR_fcntl		 55
#define __NR_setpgid		 57
#define __NR_ulimit		 58
#define __NR_umask		 60
#define __NR_chroot		 61
#define __NR_ustat		 62
#define __NR_dup2		 63
#define __NR_getppid		 64
#define __NR_setsid		 66
#define __NR_sigaction		 67
#define __NR_setreuid		 70
#define __NR_setregid		 71
#define __NR_sigsuspend		 72
#define __NR_sigpending		 73
#define __NR_sethostname	 74
#define __NR_setrlimit		 75
#define __NR_getrlimit	 	 76	/* Back compatible 2Gig limited rlimit */
#define __NR_getrusage		 77
#define __NR_gettimeofday	 78
#define __NR_settimeofday	 79
#define __NR_getgroups		 80
#define __NR_setgroups		 81
#define __NR_select		 82
#define __NR_symlink		 83
#define __NR_readlink		 85
#define __NR_uselib		 86
#define __NR_swapon		 87
#define __NR_reboot		 88
#define __NR_munmap		 91
#define __NR_truncate		 92
#define __NR_ftruncate		 93
#define __NR_fchmod		 94
#define __NR_fchown		 95
#define __NR_getpriority	 96
#define __NR_setpriority	 97
#define __NR_profil		 98
#define __NR_statfs		 99
#define __NR_fstatfs		100
#define __NR_ioperm		101
#define __NR_syslog		103
#define __NR_setitimer		104
#define __NR_getitimer		105
#define __NR_stat		106
#define __NR_lstat		107
#define __NR_fstat		108
#define __NR_iopl		110
#define __NR_vhangup		111
#define __NR_idle		112
#define __NR_wait4		114
#define __NR_swapoff		115
#define __NR_sysinfo		116
#define __NR_fsync		118
#define __NR_sigreturn		119
#define __NR_clone		120
#define __NR_setdomainname	121
#define __NR_uname		122
#define __NR_modify_ldt		123
#define __NR_adjtimex		124
#define __NR_mprotect		125
#define __NR_create_module	127
#define __NR_init_module	128
#define __NR_delete_module	129
#define __NR_quotactl		131
#define __NR_getpgid		132
#define __NR_fchdir		133
#define __NR_bdflush		134
#define __NR_sysfs		135
#define __NR_personality	136
#define __NR_setfsuid		138
#define __NR_setfsgid		139
#define __NR__llseek		140
#define __NR_getdents		141
#define __NR__newselect		142
#define __NR_flock		143
#define __NR_msync		144
#define __NR_readv		145
#define __NR_writev		146
#define __NR_cacheflush         147
#define __NR_cachectl           148
#define __NR_sysxtensa          149
#define __NR_sysdummy           150
#define __NR_getsid		151
#define __NR_fdatasync		152
#define __NR__sysctl		153
#define __NR_mlock		154
#define __NR_munlock		155
#define __NR_mlockall		156
#define __NR_munlockall		157
#define __NR_sched_setparam		158
#define __NR_sched_getparam		159
#define __NR_sched_setscheduler		160
#define __NR_sched_getscheduler		161
#define __NR_sched_yield		162
#define __NR_sched_get_priority_max	163
#define __NR_sched_get_priority_min	164
#define __NR_sched_rr_get_interval	165
#define __NR_nanosleep		166
#define __NR_mremap		167
#define __NR_accept             168
#define __NR_bind               169
#define __NR_connect            170
#define __NR_getpeername        171
#define __NR_getsockname        172
#define __NR_getsockopt         173
#define __NR_listen             174
#define __NR_recv               175
#define __NR_recvfrom           176
#define __NR_recvmsg            177
#define __NR_send               178
#define __NR_sendmsg            179
#define __NR_sendto             180
#define __NR_setsockopt         181
#define __NR_shutdown           182
#define __NR_socket             183
#define __NR_socketpair         184
#define __NR_setresuid		185
#define __NR_getresuid		186
#define __NR_query_module	187
#define __NR_poll		188
#define __NR_nfsservctl		189
#define __NR_setresgid		190
#define __NR_getresgid		191
#define __NR_prctl              192
#define __NR_rt_sigreturn	193
#define __NR_rt_sigaction	194
#define __NR_rt_sigprocmask	195
#define __NR_rt_sigpending	196
#define __NR_rt_sigtimedwait	197
#define __NR_rt_sigqueueinfo	198
#define __NR_rt_sigsuspend	199
#define __NR_pread		200
#define __NR_pwrite		201
#define __NR_chown		202
#define __NR_getcwd		203
#define __NR_capget		204
#define __NR_capset		205
#define __NR_sigaltstack	206
#define __NR_sendfile		207
#define __NR_mmap2		210
#define __NR_truncate64		211
#define __NR_ftruncate64	212
#define __NR_stat64		213
#define __NR_lstat64		214
#define __NR_fstat64		215
#define __NR_pivot_root		216
#define __NR_mincore		217
#define __NR_madvise		218
#define __NR_getdents64		219

/* Keep this last; should always equal the last valid call number. */
#define __NR_Linux_syscalls     220

/* user-visible error numbers are in the range -1 - -125: see
 * <asm-xtensa/errno.h> */

#define SYSXTENSA_RESERVED	   0	/* don't use this */
#define SYSXTENSA_ATOMIC_SET	   1	/* set variable */
#define SYSXTENSA_ATOMIC_EXG_ADD   2	/* exchange memory and add */
#define SYSXTENSA_ATOMIC_ADD	   3	/* add to memory */
#define SYSXTENSA_ATOMIC_CMP_SWP   4	/* compare and swap */

#define SYSXTENSA_COUNT		   5	/* count of syscall0 functions*/

#ifdef __KERNEL__
#define __syscall_return(type, res) return ((type)(res))
#else
#define __syscall_return(type, res) \
do { \
	if ((unsigned long)(res) >= (unsigned long)(-125)) { \
	/* Avoid using "res" which is declared to be in register r2; \
	 * errno might expand to a function call and clobber it.  */ \
		int __err = -(res); \
		errno = __err; \
		res = -1; \
	} \
	return (type) (res); \
} while (0)
#endif


/* Tensilica's xt-xcc compiler is much more agressive at code
 * optimization than gcc.  Multiple __asm__ statements are
 * insufficient for xt-xcc because subsequent optimization passes
 * (beyond the front-end that knows of __asm__ statements and other
 * such GNU Extensions to C) can modify the register selection for
 * containment of C variables.
 *
 * xt-xcc cannot modify the contents of a single __asm__ statement, so
 * we create single-asm versions of the syscall macros that are
 * suitable and optimal for both xt-xcc and gcc.
 *
 * Linux takes system-call arguments in registers.  The following
 * design is optimized for user-land apps (e.g., glibc) which
 * typically have a function wrapper around the "syscall" assembly
 * instruction.  It satisfies the Xtensa ABI while minizing argument
 * shifting.
 *
 * The Xtensa ABI and software conventions require the system-call
 * number in a2.  If an argument exists in a2, we move it to the next
 * available register.  Note that for improved efficiency, we do NOT
 * shift all parameters down one register to maintain the original
 * order.
 *
 * At best case (zero arguments), we just write the syscall number to
 * a2.  At worst case (1 to 6 arguments), we move the argument in a2
 * to the next available register, then write the syscall number to
 * a2.
 *
 * For clarity, the following truth table enumerates all possibilities.
 *
 * arguments	syscall number	arg0, arg1, arg2, arg3, arg4, arg5
 * ---------	--------------	----------------------------------
 *	0	      a2
 *	1	      a2	a3
 *	2	      a2	a4,   a3
 *	3	      a2	a5,   a3,   a4
 *	4	      a2	a6,   a3,   a4,   a5
 *	5	      a2	a7,   a3,   a4,   a5,   a6
 *	6	      a2	a8,   a3,   a4,   a5,   a6,   a7
 */

#define _syscall0(type,name) \
type name(void) \
{ \
long __res; \
__asm__ __volatile__ ( \
	"  movi  a2, %1 \n" \
	"  syscall      \n" \
	"  mov   %0, a2 \n" \
	: "=a" (__res) \
	: "i" (__NR_##name) \
	: "a2" \
	); \
__syscall_return(type,__res); \
}

#define _syscall1(type,name,type0,arg0) \
type name(type0 arg0) \
{ \
long __res; \
__asm__ __volatile__ ( \
	"  mov   a3, %2 \n" \
	"  movi  a2, %1 \n" \
	"  syscall      \n" \
	"  mov   %0, a2 \n" \
	: "=a" (__res) \
	: "i" (__NR_##name), "a" (arg0) \
	: "a2", "a3" \
	); \
__syscall_return(type,__res); \
}

#define _syscall2(type,name,type0,arg0,type1,arg1) \
type name(type0 arg0,type1 arg1) \
{ \
long __res; \
__asm__ __volatile__ ( \
	"  mov   a4, %2 \n" \
	"  mov   a3, %3 \n" \
	"  movi  a2, %1 \n" \
	"  syscall      \n" \
	"  mov   %0, a2 \n" \
	: "=a" (__res) \
	: "i" (__NR_##name), "a" (arg0), "a" (arg1) \
	: "a2", "a3", "a4" \
	); \
__syscall_return(type,__res); \
}

#define _syscall3(type,name,type0,arg0,type1,arg1,type2,arg2) \
type name(type0 arg0,type1 arg1,type2 arg2) \
{ \
long __res; \
__asm__ __volatile__ ( \
	"  mov   a5, %2 \n" \
	"  mov   a4, %4 \n" \
	"  mov   a3, %3 \n" \
	"  movi  a2, %1 \n" \
	"  syscall      \n" \
	"  mov   %0, a2 \n" \
	: "=a" (__res) \
	: "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2) \
	: "a2", "a3", "a4", "a5" \
	); \
__syscall_return(type,__res); \
}

#define _syscall4(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3) \
type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3) \
{ \
long __res; \
__asm__ __volatile__ ( \
	"  mov   a6, %2 \n" \
	"  mov   a5, %5 \n" \
	"  mov   a4, %4 \n" \
	"  mov   a3, %3 \n" \
	"  movi  a2, %1 \n" \
	"  syscall      \n" \
	"  mov   %0, a2 \n" \
	: "=a" (__res) \
	: "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), "a" (arg3) \
	: "a2", "a3", "a4", "a5", "a6" \
	); \
__syscall_return(type,__res); \
}

/* Note that we save and restore the a7 frame pointer.
 * Including a7 in the clobber list doesn't do what you'd expect.
 */
#define _syscall5(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
{ \
long __res; \
__asm__ __volatile__ ( \
	"  mov   a9, a7 \n" \
	"  mov   a7, %2 \n" \
	"  mov   a6, %6 \n" \
	"  mov   a5, %5 \n" \
	"  mov   a4, %4 \n" \
	"  mov   a3, %3 \n" \
	"  movi  a2, %1 \n" \
	"  syscall      \n" \
	"  mov   a7, a9 \n" \
	"  mov   %0, a2 \n" \
	: "=a" (__res) \
	: "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
                             "a" (arg3), "a" (arg4) \
	: "a2", "a3", "a4", "a5", "a6", "a9" \
	); \
__syscall_return(type,__res); \
}

/* Note that we save and restore the a7 frame pointer.
 * Including a7 in the clobber list doesn't do what you'd expect.
 */
#define _syscall6(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
{ \
long __res; \
__asm__ __volatile__ ( \
	"  mov   a9, a7 \n" \
	"  mov   a8, %2 \n" \
	"  mov   a7, %7 \n" \
	"  mov   a6, %6 \n" \
	"  mov   a5, %5 \n" \
	"  mov   a4, %4 \n" \
	"  mov   a3, %3 \n" \
	"  movi  a2, %1 \n" \
	"  syscall      \n" \
	"  mov   a7, a9 \n" \
	"  mov   %0, a2 \n" \
	: "=a" (__res) \
	: "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
                             "a" (arg3), "a" (arg4), "a" (arg5)  \
	: "a2", "a3", "a4", "a5", "a6", "a8", "a9" \
	); \
__syscall_return(type,__res); \
}


#ifdef __KERNEL_SYSCALLS__
static __inline__ _syscall3(int,execve,const char*,file,char**,argv,char**,envp)
#endif

/*
 * "Conditional" syscalls
 *
 * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
 * but it doesn't work on all toolchains, so we just do it by hand
 */
#define cond_syscall(x) asm(".weak\t" #x "\n\t.set\t" #x ",sys_ni_syscall");

#ifdef __KERNEL__
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_SYS_UTIME
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_RT_SIGACTION
#endif

#endif	/* _XTENSA_UNISTD_H */