1/* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific written prior permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 */ 12 13#if defined(SYSLIBC_SCCS) && !defined(lint) 14_sccsid:.asciz "@(#)sbrk.s 5.4 (Berkeley) 05/20/88" 15#endif /* SYSLIBC_SCCS and not lint */ 16 17#include "SYS.h" 18 19#define SYS_brk 17 20 21 .globl _end 22 .globl minbrk 23 .globl curbrk 24 25 .data 26minbrk: .long _end 27curbrk: .long _end 28 .text 29 30ENTRY(sbrk) 31 addl3 curbrk,4(ap),-(sp) 32 pushl $1 33 movl ap,r3 34 movl sp,ap 35 chmk $SYS_brk 36 jcs err 37 movl curbrk,r0 38 addl2 4(r3),curbrk 39 ret 40err: 41 jmp cerror 42