mirror of https://github.com/dzavalishin/oskit/
72 lines
1.9 KiB
C
Executable File
72 lines
1.9 KiB
C
Executable File
/*
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* Copyright (c) 1996, 1998, 1999 University of Utah and the Flux Group.
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* All rights reserved.
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*
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* This file is part of the Flux OSKit. The OSKit is free software, also known
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* as "open source;" you can redistribute it and/or modify it under the terms
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* of the GNU General Public License (GPL), version 2, as published by the Free
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* Software Foundation (FSF). To explore alternate licensing terms, contact
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* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
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*
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* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
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* received a copy of the GPL along with the OSKit; see the file COPYING. If
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* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
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*/
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/*
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* Stack Guards. This file is overridden by the unix mode library.
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*/
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#include <threads/pthread_internal.h>
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#ifdef STACKGUARD
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#include <oskit/c/sys/mman.h>
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#include <oskit/io/absio.h>
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#include <oskit/svm.h>
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/*
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* Init the VM code.
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*/
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void
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pthread_init_guard(void)
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{
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svm_init((oskit_absio_t *) 0);
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}
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/*
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* Set the memory protection for a region by calling mprotect.
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*/
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int
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pthread_mprotect(oskit_addr_t addr, size_t length, int prot)
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{
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int rcode;
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if (addr & (PAGE_SIZE - 1)) {
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printf("pthread_mprotect: addr 0x%x not aligned\n", addr);
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return EINVAL;
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}
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if (length & (PAGE_SIZE - 1)) {
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printf("pthread_mprotect: length %d not aligned\n", length);
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return EINVAL;
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}
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switch (prot) {
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case PROT_READ|PROT_WRITE:
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case PROT_READ:
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break;
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default:
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panic("pthread_mprotect: Bad prot: 0x%x", prot);
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break;
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}
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if ((rcode = mprotect((void *) addr, length, prot)) < 0)
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printf("pthread_mprotect: mprotect failed for: "
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"addr:0x%x len:%d prot:0x%x\n", addr, length, prot);
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return rcode;
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}
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#endif
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