1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22 #include "linux-syscalls.h"
23 #include <unistd.h>
24 #include <signal.h>
25 #include <sys/syscall.h>
26 #include <sys/types.h>
27 #include <errno.h>
28
29 #if defined(__arm__)
30 # if defined(__thumb__) || defined(__ARM_EABI__)
31 # define UV_SYSCALL_BASE 0
32 # else
33 # define UV_SYSCALL_BASE 0x900000
34 # endif
35 #endif /* __arm__ */
36
37 #ifndef __NR_recvmmsg
38 # if defined(__x86_64__)
39 # define __NR_recvmmsg 299
40 # elif defined(__arm__)
41 # define __NR_recvmmsg (UV_SYSCALL_BASE + 365)
42 # endif
43 #endif /* __NR_recvmsg */
44
45 #ifndef __NR_sendmmsg
46 # if defined(__x86_64__)
47 # define __NR_sendmmsg 307
48 # elif defined(__arm__)
49 # define __NR_sendmmsg (UV_SYSCALL_BASE + 374)
50 # endif
51 #endif /* __NR_sendmmsg */
52
53 #ifndef __NR_utimensat
54 # if defined(__x86_64__)
55 # define __NR_utimensat 280
56 # elif defined(__i386__)
57 # define __NR_utimensat 320
58 # elif defined(__arm__)
59 # define __NR_utimensat (UV_SYSCALL_BASE + 348)
60 # endif
61 #endif /* __NR_utimensat */
62
63 #ifndef __NR_preadv
64 # if defined(__x86_64__)
65 # define __NR_preadv 295
66 # elif defined(__i386__)
67 # define __NR_preadv 333
68 # elif defined(__arm__)
69 # define __NR_preadv (UV_SYSCALL_BASE + 361)
70 # endif
71 #endif /* __NR_preadv */
72
73 #ifndef __NR_pwritev
74 # if defined(__x86_64__)
75 # define __NR_pwritev 296
76 # elif defined(__i386__)
77 # define __NR_pwritev 334
78 # elif defined(__arm__)
79 # define __NR_pwritev (UV_SYSCALL_BASE + 362)
80 # endif
81 #endif /* __NR_pwritev */
82
83 #ifndef __NR_dup3
84 # if defined(__x86_64__)
85 # define __NR_dup3 292
86 # elif defined(__i386__)
87 # define __NR_dup3 330
88 # elif defined(__arm__)
89 # define __NR_dup3 (UV_SYSCALL_BASE + 358)
90 # endif
91 #endif /* __NR_pwritev */
92
93 #ifndef __NR_copy_file_range
94 # if defined(__x86_64__)
95 # define __NR_copy_file_range 326
96 # elif defined(__i386__)
97 # define __NR_copy_file_range 377
98 # elif defined(__s390__)
99 # define __NR_copy_file_range 375
100 # elif defined(__arm__)
101 # define __NR_copy_file_range (UV_SYSCALL_BASE + 391)
102 # elif defined(__aarch64__)
103 # define __NR_copy_file_range 285
104 # elif defined(__powerpc__)
105 # define __NR_copy_file_range 379
106 # elif defined(__arc__)
107 # define __NR_copy_file_range 285
108 # endif
109 #endif /* __NR_copy_file_range */
110
111 #ifndef __NR_statx
112 # if defined(__x86_64__)
113 # define __NR_statx 332
114 # elif defined(__i386__)
115 # define __NR_statx 383
116 # elif defined(__aarch64__)
117 # define __NR_statx 397
118 # elif defined(__arm__)
119 # define __NR_statx (UV_SYSCALL_BASE + 397)
120 # elif defined(__ppc__)
121 # define __NR_statx 383
122 # elif defined(__s390__)
123 # define __NR_statx 379
124 # endif
125 #endif /* __NR_statx */
126
127 #ifndef __NR_getrandom
128 # if defined(__x86_64__)
129 # define __NR_getrandom 318
130 # elif defined(__i386__)
131 # define __NR_getrandom 355
132 # elif defined(__aarch64__)
133 # define __NR_getrandom 384
134 # elif defined(__arm__)
135 # define __NR_getrandom (UV_SYSCALL_BASE + 384)
136 # elif defined(__ppc__)
137 # define __NR_getrandom 359
138 # elif defined(__s390__)
139 # define __NR_getrandom 349
140 # endif
141 #endif /* __NR_getrandom */
142
143 struct uv__mmsghdr;
144
uv__sendmmsg(int fd,struct uv__mmsghdr * mmsg,unsigned int vlen)145 int uv__sendmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen) {
146 #if defined(__i386__)
147 unsigned long args[4];
148 int rc;
149
150 args[0] = (unsigned long) fd;
151 args[1] = (unsigned long) mmsg;
152 args[2] = (unsigned long) vlen;
153 args[3] = /* flags */ 0;
154
155 /* socketcall() raises EINVAL when SYS_SENDMMSG is not supported. */
156 rc = syscall(/* __NR_socketcall */ 102, 20 /* SYS_SENDMMSG */, args);
157 if (rc == -1)
158 if (errno == EINVAL)
159 errno = ENOSYS;
160
161 return rc;
162 #elif defined(__NR_sendmmsg)
163 return syscall(__NR_sendmmsg, fd, mmsg, vlen, /* flags */ 0);
164 #else
165 return errno = ENOSYS, -1;
166 #endif
167 }
168
169
uv__recvmmsg(int fd,struct uv__mmsghdr * mmsg,unsigned int vlen)170 int uv__recvmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen) {
171 #if defined(__i386__)
172 unsigned long args[5];
173 int rc;
174
175 args[0] = (unsigned long) fd;
176 args[1] = (unsigned long) mmsg;
177 args[2] = (unsigned long) vlen;
178 args[3] = /* flags */ 0;
179 args[4] = /* timeout */ 0;
180
181 /* socketcall() raises EINVAL when SYS_RECVMMSG is not supported. */
182 rc = syscall(/* __NR_socketcall */ 102, 19 /* SYS_RECVMMSG */, args);
183 if (rc == -1)
184 if (errno == EINVAL)
185 errno = ENOSYS;
186
187 return rc;
188 #elif defined(__NR_recvmmsg)
189 return syscall(__NR_recvmmsg, fd, mmsg, vlen, /* flags */ 0, /* timeout */ 0);
190 #else
191 return errno = ENOSYS, -1;
192 #endif
193 }
194
195
uv__preadv(int fd,const struct iovec * iov,int iovcnt,int64_t offset)196 ssize_t uv__preadv(int fd, const struct iovec *iov, int iovcnt, int64_t offset) {
197 #if !defined(__NR_preadv) || defined(__ANDROID_API__) && __ANDROID_API__ < 24
198 return errno = ENOSYS, -1;
199 #else
200 return syscall(__NR_preadv, fd, iov, iovcnt, (long)offset, (long)(offset >> 32));
201 #endif
202 }
203
204
uv__pwritev(int fd,const struct iovec * iov,int iovcnt,int64_t offset)205 ssize_t uv__pwritev(int fd, const struct iovec *iov, int iovcnt, int64_t offset) {
206 #if !defined(__NR_pwritev) || defined(__ANDROID_API__) && __ANDROID_API__ < 24
207 return errno = ENOSYS, -1;
208 #else
209 return syscall(__NR_pwritev, fd, iov, iovcnt, (long)offset, (long)(offset >> 32));
210 #endif
211 }
212
213
uv__dup3(int oldfd,int newfd,int flags)214 int uv__dup3(int oldfd, int newfd, int flags) {
215 #if !defined(__NR_dup3) || defined(__ANDROID_API__) && __ANDROID_API__ < 21
216 return errno = ENOSYS, -1;
217 #else
218 return syscall(__NR_dup3, oldfd, newfd, flags);
219 #endif
220 }
221
222
223 ssize_t
uv__fs_copy_file_range(int fd_in,off_t * off_in,int fd_out,off_t * off_out,size_t len,unsigned int flags)224 uv__fs_copy_file_range(int fd_in,
225 off_t* off_in,
226 int fd_out,
227 off_t* off_out,
228 size_t len,
229 unsigned int flags)
230 {
231 #ifdef __NR_copy_file_range
232 return syscall(__NR_copy_file_range,
233 fd_in,
234 off_in,
235 fd_out,
236 off_out,
237 len,
238 flags);
239 #else
240 return errno = ENOSYS, -1;
241 #endif
242 }
243
244
uv__statx(int dirfd,const char * path,int flags,unsigned int mask,struct uv__statx * statxbuf)245 int uv__statx(int dirfd,
246 const char* path,
247 int flags,
248 unsigned int mask,
249 struct uv__statx* statxbuf) {
250 #if !defined(__NR_statx) || defined(__ANDROID_API__) && __ANDROID_API__ < 30
251 return errno = ENOSYS, -1;
252 #else
253 return syscall(__NR_statx, dirfd, path, flags, mask, statxbuf);
254 #endif
255 }
256
257
uv__getrandom(void * buf,size_t buflen,unsigned flags)258 ssize_t uv__getrandom(void* buf, size_t buflen, unsigned flags) {
259 #if !defined(__NR_getrandom) || defined(__ANDROID_API__) && __ANDROID_API__ < 28
260 return errno = ENOSYS, -1;
261 #else
262 return syscall(__NR_getrandom, buf, buflen, flags);
263 #endif
264 }
265