| blob | 411f810a55c604e0e5e5e77eede58f69dab8ddd8 |
1 /*
2 * include/asm-xtensa/unistd.h
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
9 */
11 #ifndef _XTENSA_UNISTD_H
12 #define _XTENSA_UNISTD_H
14 #define __NR_spill 0
15 #define __NR_exit 1
16 #define __NR_read 3
17 #define __NR_write 4
18 #define __NR_open 5
19 #define __NR_close 6
20 #define __NR_creat 8
21 #define __NR_link 9
22 #define __NR_unlink 10
23 #define __NR_execve 11
24 #define __NR_chdir 12
25 #define __NR_mknod 14
26 #define __NR_chmod 15
27 #define __NR_lchown 16
28 #define __NR_break 17
29 #define __NR_lseek 19
30 #define __NR_getpid 20
31 #define __NR_mount 21
32 #define __NR_setuid 23
33 #define __NR_getuid 24
34 #define __NR_ptrace 26
35 #define __NR_utime 30
36 #define __NR_stty 31
37 #define __NR_gtty 32
38 #define __NR_access 33
39 #define __NR_ftime 35
40 #define __NR_sync 36
41 #define __NR_kill 37
42 #define __NR_rename 38
43 #define __NR_mkdir 39
44 #define __NR_rmdir 40
45 #define __NR_dup 41
46 #define __NR_pipe 42
47 #define __NR_times 43
48 #define __NR_prof 44
49 #define __NR_brk 45
50 #define __NR_setgid 46
51 #define __NR_getgid 47
52 #define __NR_signal 48
53 #define __NR_geteuid 49
54 #define __NR_getegid 50
55 #define __NR_acct 51
56 #define __NR_lock 53
57 #define __NR_ioctl 54
58 #define __NR_fcntl 55
59 #define __NR_setpgid 57
60 #define __NR_ulimit 58
61 #define __NR_umask 60
62 #define __NR_chroot 61
63 #define __NR_ustat 62
64 #define __NR_dup2 63
65 #define __NR_getppid 64
66 #define __NR_setsid 66
67 #define __NR_sigaction 67
68 #define __NR_setreuid 70
69 #define __NR_setregid 71
70 #define __NR_sigsuspend 72
71 #define __NR_sigpending 73
72 #define __NR_sethostname 74
73 #define __NR_setrlimit 75
75 #define __NR_getrusage 77
76 #define __NR_gettimeofday 78
77 #define __NR_settimeofday 79
78 #define __NR_getgroups 80
79 #define __NR_setgroups 81
80 #define __NR_select 82
81 #define __NR_symlink 83
82 #define __NR_readlink 85
83 #define __NR_uselib 86
84 #define __NR_swapon 87
85 #define __NR_reboot 88
86 #define __NR_munmap 91
87 #define __NR_truncate 92
88 #define __NR_ftruncate 93
89 #define __NR_fchmod 94
90 #define __NR_fchown 95
91 #define __NR_getpriority 96
92 #define __NR_setpriority 97
93 #define __NR_profil 98
94 #define __NR_statfs 99
95 #define __NR_fstatfs 100
96 #define __NR_ioperm 101
97 #define __NR_syslog 103
98 #define __NR_setitimer 104
99 #define __NR_getitimer 105
100 #define __NR_stat 106
101 #define __NR_lstat 107
102 #define __NR_fstat 108
103 #define __NR_iopl 110
104 #define __NR_vhangup 111
105 #define __NR_idle 112
106 #define __NR_wait4 114
107 #define __NR_swapoff 115
108 #define __NR_sysinfo 116
109 #define __NR_fsync 118
110 #define __NR_sigreturn 119
111 #define __NR_clone 120
112 #define __NR_setdomainname 121
113 #define __NR_uname 122
114 #define __NR_modify_ldt 123
115 #define __NR_adjtimex 124
116 #define __NR_mprotect 125
117 #define __NR_create_module 127
118 #define __NR_init_module 128
119 #define __NR_delete_module 129
120 #define __NR_quotactl 131
121 #define __NR_getpgid 132
122 #define __NR_fchdir 133
123 #define __NR_bdflush 134
124 #define __NR_sysfs 135
125 #define __NR_personality 136
126 #define __NR_setfsuid 138
127 #define __NR_setfsgid 139
128 #define __NR__llseek 140
129 #define __NR_getdents 141
130 #define __NR__newselect 142
131 #define __NR_flock 143
132 #define __NR_msync 144
133 #define __NR_readv 145
134 #define __NR_writev 146
135 #define __NR_cacheflush 147
136 #define __NR_cachectl 148
137 #define __NR_sysxtensa 149
138 #define __NR_sysdummy 150
139 #define __NR_getsid 151
140 #define __NR_fdatasync 152
141 #define __NR__sysctl 153
142 #define __NR_mlock 154
143 #define __NR_munlock 155
144 #define __NR_mlockall 156
145 #define __NR_munlockall 157
146 #define __NR_sched_setparam 158
147 #define __NR_sched_getparam 159
148 #define __NR_sched_setscheduler 160
149 #define __NR_sched_getscheduler 161
150 #define __NR_sched_yield 162
151 #define __NR_sched_get_priority_max 163
152 #define __NR_sched_get_priority_min 164
153 #define __NR_sched_rr_get_interval 165
154 #define __NR_nanosleep 166
155 #define __NR_mremap 167
156 #define __NR_accept 168
157 #define __NR_bind 169
158 #define __NR_connect 170
159 #define __NR_getpeername 171
160 #define __NR_getsockname 172
161 #define __NR_getsockopt 173
162 #define __NR_listen 174
163 #define __NR_recv 175
164 #define __NR_recvfrom 176
165 #define __NR_recvmsg 177
166 #define __NR_send 178
167 #define __NR_sendmsg 179
168 #define __NR_sendto 180
169 #define __NR_setsockopt 181
170 #define __NR_shutdown 182
171 #define __NR_socket 183
172 #define __NR_socketpair 184
173 #define __NR_setresuid 185
174 #define __NR_getresuid 186
175 #define __NR_query_module 187
176 #define __NR_poll 188
177 #define __NR_nfsservctl 189
178 #define __NR_setresgid 190
179 #define __NR_getresgid 191
180 #define __NR_prctl 192
181 #define __NR_rt_sigreturn 193
182 #define __NR_rt_sigaction 194
183 #define __NR_rt_sigprocmask 195
184 #define __NR_rt_sigpending 196
185 #define __NR_rt_sigtimedwait 197
186 #define __NR_rt_sigqueueinfo 198
187 #define __NR_rt_sigsuspend 199
188 #define __NR_pread 200
189 #define __NR_pwrite 201
190 #define __NR_chown 202
191 #define __NR_getcwd 203
192 #define __NR_capget 204
193 #define __NR_capset 205
194 #define __NR_sigaltstack 206
195 #define __NR_sendfile 207
196 #define __NR_mmap2 210
197 #define __NR_truncate64 211
198 #define __NR_ftruncate64 212
199 #define __NR_stat64 213
200 #define __NR_lstat64 214
201 #define __NR_fstat64 215
202 #define __NR_pivot_root 216
203 #define __NR_mincore 217
204 #define __NR_madvise 218
205 #define __NR_getdents64 219
207 /* Keep this last; should always equal the last valid call number. */
208 #define __NR_Linux_syscalls 220
210 /* user-visible error numbers are in the range -1 - -125: see
211 * <asm-xtensa/errno.h> */
221 #ifdef __KERNEL__
222 #include <linux/linkage.h>
224 #define __syscall_return(type, res) return ((type)(res))
226 /* Tensilica's xt-xcc compiler is much more agressive at code
227 * optimization than gcc. Multiple __asm__ statements are
228 * insufficient for xt-xcc because subsequent optimization passes
229 * (beyond the front-end that knows of __asm__ statements and other
230 * such GNU Extensions to C) can modify the register selection for
231 * containment of C variables.
232 *
233 * xt-xcc cannot modify the contents of a single __asm__ statement, so
234 * we create single-asm versions of the syscall macros that are
235 * suitable and optimal for both xt-xcc and gcc.
236 *
237 * Linux takes system-call arguments in registers. The following
238 * design is optimized for user-land apps (e.g., glibc) which
239 * typically have a function wrapper around the "syscall" assembly
240 * instruction. It satisfies the Xtensa ABI while minizing argument
241 * shifting.
242 *
243 * The Xtensa ABI and software conventions require the system-call
244 * number in a2. If an argument exists in a2, we move it to the next
245 * available register. Note that for improved efficiency, we do NOT
246 * shift all parameters down one register to maintain the original
247 * order.
248 *
249 * At best case (zero arguments), we just write the syscall number to
250 * a2. At worst case (1 to 6 arguments), we move the argument in a2
251 * to the next available register, then write the syscall number to
252 * a2.
253 *
254 * For clarity, the following truth table enumerates all possibilities.
255 *
256 * arguments syscall number arg0, arg1, arg2, arg3, arg4, arg5
257 * --------- -------------- ----------------------------------
258 * 0 a2
259 * 1 a2 a3
260 * 2 a2 a4, a3
261 * 3 a2 a5, a3, a4
262 * 4 a2 a6, a3, a4, a5
263 * 5 a2 a7, a3, a4, a5, a6
264 * 6 a2 a8, a3, a4, a5, a6, a7
265 */
267 #define _syscall0(type,name) \
268 type name(void) \
269 { \
270 long __res; \
271 __asm__ __volatile__ ( \
278 ); \
279 __syscall_return(type,__res); \
280 }
282 #define _syscall1(type,name,type0,arg0) \
283 type name(type0 arg0) \
284 { \
285 long __res; \
286 __asm__ __volatile__ ( \
294 ); \
295 __syscall_return(type,__res); \
296 }
298 #define _syscall2(type,name,type0,arg0,type1,arg1) \
299 type name(type0 arg0,type1 arg1) \
300 { \
301 long __res; \
302 __asm__ __volatile__ ( \
311 ); \
312 __syscall_return(type,__res); \
313 }
315 #define _syscall3(type,name,type0,arg0,type1,arg1,type2,arg2) \
316 type name(type0 arg0,type1 arg1,type2 arg2) \
317 { \
318 long __res; \
319 __asm__ __volatile__ ( \
329 ); \
330 __syscall_return(type,__res); \
331 }
333 #define _syscall4(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3) \
334 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3) \
335 { \
336 long __res; \
337 __asm__ __volatile__ ( \
348 ); \
349 __syscall_return(type,__res); \
350 }
352 /* Note that we save and restore the a7 frame pointer.
353 * Including a7 in the clobber list doesn't do what you'd expect.
354 */
355 #define _syscall5(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
356 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
357 { \
358 long __res; \
359 __asm__ __volatile__ ( \
374 ); \
375 __syscall_return(type,__res); \
376 }
378 /* Note that we save and restore the a7 frame pointer.
379 * Including a7 in the clobber list doesn't do what you'd expect.
380 */
381 #define _syscall6(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
382 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
383 { \
384 long __res; \
385 __asm__ __volatile__ ( \
401 ); \
402 __syscall_return(type,__res); \
403 }
405 /*
406 * "Conditional" syscalls
407 *
408 * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
409 * but it doesn't work on all toolchains, so we just do it by hand
410 */
413 #define __ARCH_WANT_STAT64
414 #define __ARCH_WANT_SYS_UTIME
415 #define __ARCH_WANT_SYS_LLSEEK
416 #define __ARCH_WANT_SYS_RT_SIGACTION