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