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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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/* Copyright (C) 1994 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <mach.h>
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/* Change the memory protection of the region starting at ADDR and
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extending LEN bytes to PROT. Returns 0 if successful, -1 for errors
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(and sets errno). */
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int
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mprotect (caddr_t addr, size_t len, int prot)
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{
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kern_return_t err;
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vm_prot_t vmprot;
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vmprot = VM_PROT_NONE;
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if (prot & PROT_READ)
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vmprot |= VM_PROT_READ;
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if (prot & PROT_WRITE)
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vmprot |= VM_PROT_WRITE;
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if (prot & PROT_EXEC)
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vmprot |= VM_PROT_EXECUTE;
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if (err = __vm_protect (__mach_task_self (),
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(vm_address_t) addr, (vm_size_t) len,
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0, vmprot))
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{
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errno = err;
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return -1;
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}
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return 0;
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}
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