libpthread/linuxthreads.old/wrapsyscall.c

   1 /* Wrapper around system calls to provide cancellation points.
   2    Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    see <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fcntl.h>
  21 #include <sys/mman.h>
  22 #include <pthread.h>
  23 #include <unistd.h>
  24 #include <stdarg.h>
  25 #include <stddef.h>
  26 #include <stdlib.h>
  27 #include <termios.h>
  28 #include <sys/epoll.h>
  29 #include <sys/resource.h>
  30 #include <sys/wait.h>
  31 #include <sys/socket.h>
  32 #include <sys/syscall.h>
  33
  34
  35 #ifndef __PIC__
  36 /* We need a hook to force this file to be linked in when static
  37    libpthread is used.  */
  38 const char __pthread_provide_wrappers = 0;
  39 #endif
  40
  41 /* Using private interface to libc (__libc_foo) to implement
  42  * cancellable versions of some libc functions */
  43 #define CANCELABLE_SYSCALL(res_type, name, param_list, params)                  \
  44 res_type __libc_##name param_list;                                              \
  45 res_type                                                                        \
  46 __attribute__ ((weak))                                                          \
  47 name param_list                                                                 \
  48 {                                                                               \
  49   res_type result;                                                              \
  50   int oldtype;                                                                  \
  51   pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype);                \
  52   result = __libc_##name params;                                                \
  53   pthread_setcanceltype (oldtype, NULL);                                        \
  54   return result;                                                                \
  55 }
  56
  57 #define CANCELABLE_SYSCALL_VA(res_type, name, param_list, params, last_arg)     \
  58 res_type __libc_##name param_list;                                              \
  59 res_type                                                                        \
  60 __attribute__ ((weak))                                                          \
  61 name param_list                                                                 \
  62 {                                                                               \
  63   res_type result;                                                              \
  64   int oldtype;                                                                  \
  65   va_list ap;                                                                   \
  66   pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype);                \
  67   va_start (ap, last_arg);                                                      \
  68   result = __libc_##name params;                                                \
  69   va_end (ap);                                                                  \
  70   pthread_setcanceltype (oldtype, NULL);                                        \
  71   return result;                                                                \
  72 }
  73
  74
  75 /* close(2).  */
  76 CANCELABLE_SYSCALL (int, close, (int fd), (fd))
  77
  78
  79 /* fcntl(2).  */
  80 CANCELABLE_SYSCALL_VA (int, fcntl, (int fd, int cmd, ...),
  81                        (fd, cmd, va_arg (ap, long int)), cmd)
  82
  83 #if defined __UCLIBC_HAS_LFS__ && __WORDSIZE == 32
  84 /* fcntl64(2).  */
  85 CANCELABLE_SYSCALL_VA (int, fcntl64, (int fd, int cmd, ...),
  86                        (fd, cmd, va_arg (ap, long int)), cmd)
  87 #endif
  88
  89
  90 /* fsync(2).  */
  91 CANCELABLE_SYSCALL (int, fsync, (int fd), (fd))
  92
  93
  94 /* lseek(2).  */
  95 CANCELABLE_SYSCALL (off_t, lseek, (int fd, off_t offset, int whence),
  96                     (fd, offset, whence))
  97
  98 #ifdef __UCLIBC_HAS_LFS__
  99 /* lseek64(2).  */
 100 CANCELABLE_SYSCALL (off64_t, lseek64, (int fd, off64_t offset, int whence),
 101                     (fd, offset, whence))
 102 #endif
 103
 104 #if defined(__NR_msync) && defined(__ARCH_USE_MMU__)
 105
 106 /* msync(2).  */
 107 CANCELABLE_SYSCALL (int, msync, (void *addr, size_t length, int flags),
 108                     (addr, length, flags))
 109 #endif
 110
 111
 112 /* nanosleep(2).  */
 113 libpthread_hidden_proto(nanosleep)
 114 CANCELABLE_SYSCALL (int, nanosleep, (const struct timespec *requested_time,
 115                                      struct timespec *remaining),
 116                     (requested_time, remaining))
 117 libpthread_hidden_def(nanosleep)
 118
 119
 120 /* open(2).  */
 121 CANCELABLE_SYSCALL_VA (int, open, (const char *pathname, int flags, ...),
 122                        (pathname, flags, va_arg (ap, mode_t)), flags)
 123
 124
 125 #ifdef __UCLIBC_HAS_LFS__
 126 /* open64(3).  */
 127 CANCELABLE_SYSCALL_VA (int, open64, (const char *pathname, int flags, ...),
 128                        (pathname, flags, va_arg (ap, mode_t)), flags)
 129 #endif
 130
 131 /* pause(2).  */
 132 CANCELABLE_SYSCALL (int, pause, (void), ())
 133
 134
 135 /* Enable this if enabling these in syscalls.c */
 136 /* pread(3).  */
 137 CANCELABLE_SYSCALL (ssize_t, pread, (int fd, void *buf, size_t count,
 138                                      off_t offset),
 139                     (fd, buf, count, offset))
 140
 141
 142 #if defined __UCLIBC_HAS_LFS__ && defined __NR_pread64
 143 /* pread64(3).  */
 144 CANCELABLE_SYSCALL (ssize_t, pread64, (int fd, void *buf, size_t count,
 145                                        off64_t offset),
 146                     (fd, buf, count, offset))
 147 #endif
 148
 149 /* pwrite(3).  */
 150 CANCELABLE_SYSCALL (ssize_t, pwrite, (int fd, const void *buf, size_t n,
 151                                       off_t offset),
 152                     (fd, buf, n, offset))
 153
 154
 155 #if defined __UCLIBC_HAS_LFS__ && defined __NR_pwrited64
 156 /* pwrite64(3).  */
 157 CANCELABLE_SYSCALL (ssize_t, pwrite64, (int fd, const void *buf, size_t n,
 158                                         off64_t offset),
 159                     (fd, buf, n, offset))
 160 #endif
 161
 162 /* read(2).  */
 163 CANCELABLE_SYSCALL (ssize_t, read, (int fd, void *buf, size_t count),
 164                     (fd, buf, count))
 165
 166
 167 /* system(3).  */
 168 CANCELABLE_SYSCALL (int, system, (const char *line), (line))
 169
 170
 171 /* tcdrain(2).  */
 172 CANCELABLE_SYSCALL (int, tcdrain, (int fd), (fd))
 173
 174
 175 /* wait(2).  */
 176 CANCELABLE_SYSCALL (__pid_t, wait, (__WAIT_STATUS_DEFN stat_loc), (stat_loc))
 177
 178
 179 /* waitpid(2).  */
 180 libpthread_hidden_proto(waitpid)
 181 CANCELABLE_SYSCALL (__pid_t, waitpid, (__pid_t pid, int *stat_loc,
 182                                        int options),
 183                     (pid, stat_loc, options))
 184 libpthread_hidden_def(waitpid)
 185
 186
 187 /* write(2).  */
 188 CANCELABLE_SYSCALL (ssize_t, write, (int fd, const void *buf, size_t n),
 189                     (fd, buf, n))
 190
 191 #if defined __UCLIBC_HAS_SOCKET__
 192 /* The following system calls are thread cancellation points specified
 193    in XNS.  */
 194
 195 /* accept(2).  */
 196 CANCELABLE_SYSCALL (int, accept, (int fd, __SOCKADDR_ARG addr,
 197                                   socklen_t *addr_len),
 198                     (fd, addr, addr_len))
 199
 200 /* connect(2).  */
 201 CANCELABLE_SYSCALL (int, connect, (int fd, __CONST_SOCKADDR_ARG addr,
 202                                      socklen_t len),
 203                     (fd, addr, len))
 204
 205 /* recv(2).  */
 206 CANCELABLE_SYSCALL (ssize_t, recv, (int fd, __ptr_t buf, size_t n, int flags),
 207                     (fd, buf, n, flags))
 208
 209 /* recvfrom(2).  */
 210 CANCELABLE_SYSCALL (ssize_t, recvfrom, (int fd, __ptr_t buf, size_t n, int flags,
 211                                         __SOCKADDR_ARG addr, socklen_t *addr_len),
 212                     (fd, buf, n, flags, addr, addr_len))
 213
 214 /* recvmsg(2).  */
 215 CANCELABLE_SYSCALL (ssize_t, recvmsg, (int fd, struct msghdr *message, int flags),
 216                     (fd, message, flags))
 217
 218 /* send(2).  */
 219 CANCELABLE_SYSCALL (ssize_t, send, (int fd, const __ptr_t buf, size_t n,
 220                                     int flags),
 221                     (fd, buf, n, flags))
 222
 223 /* sendmsg(2).  */
 224 CANCELABLE_SYSCALL (ssize_t, sendmsg, (int fd, const struct msghdr *message,
 225                                        int flags),
 226                     (fd, message, flags))
 227
 228 /* sendto(2).  */
 229 CANCELABLE_SYSCALL (ssize_t, sendto, (int fd, const __ptr_t buf, size_t n,
 230                                       int flags, __CONST_SOCKADDR_ARG addr,
 231                                       socklen_t addr_len),
 232                     (fd, buf, n, flags, addr, addr_len))
 233 #endif /* __UCLIBC_HAS_SOCKET__ */
 234
 235 #ifdef  __UCLIBC_HAS_EPOLL__
 236 # include <sys/epoll.h>
 237 # ifdef __NR_epoll_wait
 238 CANCELABLE_SYSCALL (int, epoll_wait, (int epfd, struct epoll_event *events, int maxevents, int timeout),
 239                     (epfd, events, maxevents, timeout))
 240 # endif
 241 # ifdef __NR_epoll_pwait
 242 CANCELABLE_SYSCALL (int, epoll_pwait, (int epfd, struct epoll_event *events, int maxevents, int timeout,
 243                                        const sigset_t *set),
 244                     (epfd, events, maxevents, timeout, set))
 245 # endif
 246 #endif