sbrk.c

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

/*************************************************************
 * File: imon/sbrk.c
 * Purpose: Part of the Ice Monitor
 * Author: Phil Bunce ([e-mail])
 * Revision History:
 *	970304	Start of revision history
 */

#include <imon.h>

extern char BSS_END;
char *allocp1 = &BSS_END;

char *sbrk(n)
int n;
{
char *heaptop,*t;

t = getMonEnv("heaptop");
if (t == 0) heaptop = (char *)CLIENTPC;
else {
	if (!atob(&heaptop,t,16)) {
		heaptop = (char *)CLIENTPC;
		}
	}
if (allocp1 + n <= heaptop) {
	allocp1 += n;
	return(allocp1 - n);
	} 
else return(0);
}