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 the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18#if defined(SYSLIBC_SCCS) && !defined(lint) 19 .asciz "@(#)sbrk.s 5.5 (Berkeley) 06/27/88" 20#endif /* SYSLIBC_SCCS and not lint */ 21 22#include "SYS.h" 23 24#define SYS_brk 17 25 26 .globl _end 27 .globl minbrk 28 .globl curbrk 29 30 .data 31minbrk: .long _end 32curbrk: .long _end 33 .text 34 35ENTRY(sbrk) 36 addl3 curbrk,4(ap),-(sp) 37 pushl $1 38 movl ap,r3 39 movl sp,ap 40 chmk $SYS_brk 41 jcs err 42 movl curbrk,r0 43 addl2 4(r3),curbrk 44 ret 45err: 46 jmp cerror 47