Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / hypervisor / src / sample / lib / sbrk.c

/*
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*
* Hypervisor Software File: sbrk.c
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/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident	"@(#)sbrk.c	1.2	03/11/10 SMI"

#include <unistd.h>

extern char _end;
static char *sbrkp = &_end;
void *
sbrk(intptr_t incr)
{
	void *p = sbrkp;
	if (sbrkp + incr >= &_end) {
		sbrkp += incr;
		return p;
	}
	return (void *)-1;
}

int
brk(void *endds)
{
	if ((endds >= (void *)&_end) && (sbrk((char *)endds - sbrkp) != (void *)-1))
		return 0;
	return -1;

}