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67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/* Bounded-pointer checking macros for C.
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Copyright (C) 2000-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Greg McGary <greg@mcgary.org>
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _bp_semctl_h_
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#define _bp_semctl_h_ 1
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#if __BOUNDED_POINTERS__
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# define CHECK_SEMCTL(ARGP, SEMID, CMD) check_semctl (ARGP, SEMID, CMD)
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union semun *__unbounded
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check_semctl (union semun *arg, int semid, int cmd)
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{
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int ipc64 = (cmd & __IPC_64);
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switch (cmd & ~__IPC_64)
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{
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case IPC_STAT:
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case IPC_SET:
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(void) CHECK_1 (arg->buf);
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break;
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case GETALL:
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case SETALL:
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{
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struct semid_ds ds;
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union semun un = { .buf = &ds };
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unsigned int length = ~0;
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/* It's unfortunate that we need to make a recursive
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system call to get the size of the semaphore set... */
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if (semctl (semid, 0, IPC_STAT | ipc64, un) == 0)
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length = ds.sem_nsems;
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(void) CHECK_N (arg->array, length);
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break;
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}
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case IPC_INFO:
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(void) CHECK_1 (arg->__buf);
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break;
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}
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return __ptrvalue (arg);
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}
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#else
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# define CHECK_SEMCTL(ARGP, SEMID, CMD) (ARGP)
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#endif
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#endif /* _bp_semctl_h_ */
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