2 * include/asm-xtensa/unistd.h
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
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
11 #ifndef _XTENSA_UNISTD_H
12 #define _XTENSA_UNISTD_H
14 #include <linux/linkage.h>
24 #define __NR_unlink 10
25 #define __NR_execve 11
29 #define __NR_lchown 16
32 #define __NR_getpid 20
34 #define __NR_setuid 23
35 #define __NR_getuid 24
36 #define __NR_ptrace 26
40 #define __NR_access 33
44 #define __NR_rename 38
52 #define __NR_setgid 46
53 #define __NR_getgid 47
54 #define __NR_signal 48
55 #define __NR_geteuid 49
56 #define __NR_getegid 50
61 #define __NR_setpgid 57
62 #define __NR_ulimit 58
64 #define __NR_chroot 61
67 #define __NR_getppid 64
68 #define __NR_setsid 66
69 #define __NR_sigaction 67
70 #define __NR_setreuid 70
71 #define __NR_setregid 71
72 #define __NR_sigsuspend 72
73 #define __NR_sigpending 73
74 #define __NR_sethostname 74
75 #define __NR_setrlimit 75
76 #define __NR_getrlimit 76 /* Back compatible 2Gig limited rlimit */
77 #define __NR_getrusage 77
78 #define __NR_gettimeofday 78
79 #define __NR_settimeofday 79
80 #define __NR_getgroups 80
81 #define __NR_setgroups 81
82 #define __NR_select 82
83 #define __NR_symlink 83
84 #define __NR_readlink 85
85 #define __NR_uselib 86
86 #define __NR_swapon 87
87 #define __NR_reboot 88
88 #define __NR_munmap 91
89 #define __NR_truncate 92
90 #define __NR_ftruncate 93
91 #define __NR_fchmod 94
92 #define __NR_fchown 95
93 #define __NR_getpriority 96
94 #define __NR_setpriority 97
95 #define __NR_profil 98
96 #define __NR_statfs 99
97 #define __NR_fstatfs 100
98 #define __NR_ioperm 101
99 #define __NR_syslog 103
100 #define __NR_setitimer 104
101 #define __NR_getitimer 105
102 #define __NR_stat 106
103 #define __NR_lstat 107
104 #define __NR_fstat 108
105 #define __NR_iopl 110
106 #define __NR_vhangup 111
107 #define __NR_idle 112
108 #define __NR_wait4 114
109 #define __NR_swapoff 115
110 #define __NR_sysinfo 116
111 #define __NR_fsync 118
112 #define __NR_sigreturn 119
113 #define __NR_clone 120
114 #define __NR_setdomainname 121
115 #define __NR_uname 122
116 #define __NR_modify_ldt 123
117 #define __NR_adjtimex 124
118 #define __NR_mprotect 125
119 #define __NR_create_module 127
120 #define __NR_init_module 128
121 #define __NR_delete_module 129
122 #define __NR_quotactl 131
123 #define __NR_getpgid 132
124 #define __NR_fchdir 133
125 #define __NR_bdflush 134
126 #define __NR_sysfs 135
127 #define __NR_personality 136
128 #define __NR_setfsuid 138
129 #define __NR_setfsgid 139
130 #define __NR__llseek 140
131 #define __NR_getdents 141
132 #define __NR__newselect 142
133 #define __NR_flock 143
134 #define __NR_msync 144
135 #define __NR_readv 145
136 #define __NR_writev 146
137 #define __NR_cacheflush 147
138 #define __NR_cachectl 148
139 #define __NR_sysxtensa 149
140 #define __NR_sysdummy 150
141 #define __NR_getsid 151
142 #define __NR_fdatasync 152
143 #define __NR__sysctl 153
144 #define __NR_mlock 154
145 #define __NR_munlock 155
146 #define __NR_mlockall 156
147 #define __NR_munlockall 157
148 #define __NR_sched_setparam 158
149 #define __NR_sched_getparam 159
150 #define __NR_sched_setscheduler 160
151 #define __NR_sched_getscheduler 161
152 #define __NR_sched_yield 162
153 #define __NR_sched_get_priority_max 163
154 #define __NR_sched_get_priority_min 164
155 #define __NR_sched_rr_get_interval 165
156 #define __NR_nanosleep 166
157 #define __NR_mremap 167
158 #define __NR_accept 168
159 #define __NR_bind 169
160 #define __NR_connect 170
161 #define __NR_getpeername 171
162 #define __NR_getsockname 172
163 #define __NR_getsockopt 173
164 #define __NR_listen 174
165 #define __NR_recv 175
166 #define __NR_recvfrom 176
167 #define __NR_recvmsg 177
168 #define __NR_send 178
169 #define __NR_sendmsg 179
170 #define __NR_sendto 180
171 #define __NR_setsockopt 181
172 #define __NR_shutdown 182
173 #define __NR_socket 183
174 #define __NR_socketpair 184
175 #define __NR_setresuid 185
176 #define __NR_getresuid 186
177 #define __NR_query_module 187
178 #define __NR_poll 188
179 #define __NR_nfsservctl 189
180 #define __NR_setresgid 190
181 #define __NR_getresgid 191
182 #define __NR_prctl 192
183 #define __NR_rt_sigreturn 193
184 #define __NR_rt_sigaction 194
185 #define __NR_rt_sigprocmask 195
186 #define __NR_rt_sigpending 196
187 #define __NR_rt_sigtimedwait 197
188 #define __NR_rt_sigqueueinfo 198
189 #define __NR_rt_sigsuspend 199
190 #define __NR_pread 200
191 #define __NR_pwrite 201
192 #define __NR_chown 202
193 #define __NR_getcwd 203
194 #define __NR_capget 204
195 #define __NR_capset 205
196 #define __NR_sigaltstack 206
197 #define __NR_sendfile 207
198 #define __NR_mmap2 210
199 #define __NR_truncate64 211
200 #define __NR_ftruncate64 212
201 #define __NR_stat64 213
202 #define __NR_lstat64 214
203 #define __NR_fstat64 215
204 #define __NR_pivot_root 216
205 #define __NR_mincore 217
206 #define __NR_madvise 218
207 #define __NR_getdents64 219
209 /* Keep this last; should always equal the last valid call number. */
210 #define __NR_Linux_syscalls 220
212 /* user-visible error numbers are in the range -1 - -125: see
213 * <asm-xtensa/errno.h> */
215 #define SYSXTENSA_RESERVED 0 /* don't use this */
216 #define SYSXTENSA_ATOMIC_SET 1 /* set variable */
217 #define SYSXTENSA_ATOMIC_EXG_ADD 2 /* exchange memory and add */
218 #define SYSXTENSA_ATOMIC_ADD 3 /* add to memory */
219 #define SYSXTENSA_ATOMIC_CMP_SWP 4 /* compare and swap */
221 #define SYSXTENSA_COUNT 5 /* count of syscall0 functions*/
224 #define __syscall_return(type, res) return ((type)(res))
226 #define __syscall_return(type, res) \
228 if ((unsigned long)(res) >= (unsigned long)(-125)) { \
229 /* Avoid using "res" which is declared to be in register r2; \
230 * errno might expand to a function call and clobber it. */ \
231 int __err = -(res); \
235 return (type) (res); \
240 /* Tensilica's xt-xcc compiler is much more agressive at code
241 * optimization than gcc. Multiple __asm__ statements are
242 * insufficient for xt-xcc because subsequent optimization passes
243 * (beyond the front-end that knows of __asm__ statements and other
244 * such GNU Extensions to C) can modify the register selection for
245 * containment of C variables.
247 * xt-xcc cannot modify the contents of a single __asm__ statement, so
248 * we create single-asm versions of the syscall macros that are
249 * suitable and optimal for both xt-xcc and gcc.
251 * Linux takes system-call arguments in registers. The following
252 * design is optimized for user-land apps (e.g., glibc) which
253 * typically have a function wrapper around the "syscall" assembly
254 * instruction. It satisfies the Xtensa ABI while minizing argument
257 * The Xtensa ABI and software conventions require the system-call
258 * number in a2. If an argument exists in a2, we move it to the next
259 * available register. Note that for improved efficiency, we do NOT
260 * shift all parameters down one register to maintain the original
263 * At best case (zero arguments), we just write the syscall number to
264 * a2. At worst case (1 to 6 arguments), we move the argument in a2
265 * to the next available register, then write the syscall number to
268 * For clarity, the following truth table enumerates all possibilities.
270 * arguments syscall number arg0, arg1, arg2, arg3, arg4, arg5
271 * --------- -------------- ----------------------------------
276 * 4 a2 a6, a3, a4, a5
277 * 5 a2 a7, a3, a4, a5, a6
278 * 6 a2 a8, a3, a4, a5, a6, a7
281 #define _syscall0(type,name) \
285 __asm__ __volatile__ ( \
290 : "i" (__NR_##name) \
293 __syscall_return(type,__res); \
296 #define _syscall1(type,name,type0,arg0) \
297 type name(type0 arg0) \
300 __asm__ __volatile__ ( \
306 : "i" (__NR_##name), "a" (arg0) \
309 __syscall_return(type,__res); \
312 #define _syscall2(type,name,type0,arg0,type1,arg1) \
313 type name(type0 arg0,type1 arg1) \
316 __asm__ __volatile__ ( \
323 : "i" (__NR_##name), "a" (arg0), "a" (arg1) \
326 __syscall_return(type,__res); \
329 #define _syscall3(type,name,type0,arg0,type1,arg1,type2,arg2) \
330 type name(type0 arg0,type1 arg1,type2 arg2) \
333 __asm__ __volatile__ ( \
341 : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2) \
342 : "a2", "a3", "a4", "a5" \
344 __syscall_return(type,__res); \
347 #define _syscall4(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3) \
348 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3) \
351 __asm__ __volatile__ ( \
360 : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), "a" (arg3) \
361 : "a2", "a3", "a4", "a5", "a6" \
363 __syscall_return(type,__res); \
366 /* Note that we save and restore the a7 frame pointer.
367 * Including a7 in the clobber list doesn't do what you'd expect.
369 #define _syscall5(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
370 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
373 __asm__ __volatile__ ( \
385 : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
386 "a" (arg3), "a" (arg4) \
387 : "a2", "a3", "a4", "a5", "a6", "a9" \
389 __syscall_return(type,__res); \
392 /* Note that we save and restore the a7 frame pointer.
393 * Including a7 in the clobber list doesn't do what you'd expect.
395 #define _syscall6(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
396 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
399 __asm__ __volatile__ ( \
412 : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
413 "a" (arg3), "a" (arg4), "a" (arg5) \
414 : "a2", "a3", "a4", "a5", "a6", "a8", "a9" \
416 __syscall_return(type,__res); \
420 #ifdef __KERNEL_SYSCALLS__
421 static __inline__ _syscall3(int,execve,const char*,file,char**,argv,char**,envp)
425 * "Conditional" syscalls
427 * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
428 * but it doesn't work on all toolchains, so we just do it by hand
430 #define cond_syscall(x) asm(".weak\t" #x "\n\t.set\t" #x ",sys_ni_syscall");
433 #define __ARCH_WANT_STAT64
434 #define __ARCH_WANT_SYS_UTIME
435 #define __ARCH_WANT_SYS_LLSEEK
436 #define __ARCH_WANT_SYS_RT_SIGACTION
439 #endif /* _XTENSA_UNISTD_H */