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0482576e | 1 | /* Copyright (C) 1995, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
3e5f5557 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. | |
28f540f4 | 4 | |
3e5f5557 UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
28f540f4 | 9 | |
3e5f5557 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
28f540f4 | 14 | |
3e5f5557 UD |
15 | You should have received a copy of the GNU Library General Public |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
28f540f4 | 19 | |
e9dcb080 | 20 | #include <errno.h> |
bbed653c | 21 | #include <sys/shm.h> |
973209d8 | 22 | #include <ipc_priv.h> |
28f540f4 | 23 | |
e9dcb080 UD |
24 | #include <sysdep.h> |
25 | #include <sys/syscall.h> | |
d25c879d | 26 | #include <bp-checks.h> |
e9dcb080 | 27 | |
d2f5be2a UD |
28 | /* Attach the shared memory segment associated with SHMID to the data |
29 | segment of the calling process. SHMADDR and SHMFLG determine how | |
30 | and where the segment is attached. */ | |
28f540f4 | 31 | |
3e5f5557 | 32 | void * |
d2f5be2a UD |
33 | shmat (shmid, shmaddr, shmflg) |
34 | int shmid; | |
3e5f5557 | 35 | const void *shmaddr; |
d2f5be2a UD |
36 | int shmflg; |
37 | { | |
d25c879d GM |
38 | void *__unbounded result; |
39 | void *__unbounded raddr; | |
40 | ||
41 | #if __BOUNDED_POINTERS__ | |
42 | size_t length = ~0; | |
43 | struct shmid_ds shmds; | |
44 | /* It's unfortunate that we need to make another system call to get | |
45 | the shared memory segment length... */ | |
da8f38c5 | 46 | if (shmctl (shmid, IPC_STAT, &shmds) == 0) |
d25c879d GM |
47 | length = shmds.shm_segsz; |
48 | #endif | |
49 | ||
50 | result = (void *__unbounded) INLINE_SYSCALL (ipc, 5, IPCOP_shmat, shmid, shmflg, | |
21e41c58 | 51 | (long int) __ptrvalue (&raddr), |
d25c879d GM |
52 | __ptrvalue (shmaddr)); |
53 | if ((unsigned long) result <= -(unsigned long) SHMLBA) | |
54 | result = raddr; | |
55 | ||
56 | return BOUNDED_N (result, length); | |
d2f5be2a | 57 | } |