152730Sbostic/*- 252730Sbostic * Copyright (c) 1991 The Regents of the University of California. 352730Sbostic * All rights reserved. 452730Sbostic * 552730Sbostic * This code is derived from software contributed to Berkeley by 652730Sbostic * Ralph Campbell. 752730Sbostic * 852730Sbostic * %sccs.include.redist.c% 952730Sbostic */ 1052730Sbostic 1152730Sbostic#include "SYS.h" 1252730Sbostic 1352730Sbostic#if defined(LIBC_SCCS) && !defined(lint) 14*57859Sralph ASMSTR("@(#)sbrk.s 5.2 (Berkeley) 02/04/93") 1552730Sbostic#endif /* LIBC_SCCS and not lint */ 1652730Sbostic 1752730Sbostic#define SYS_brk 17 1852730Sbostic 19*57859Sralph .data 2052730Sbostic .globl _minbrk 2152730Sbostic_minbrk: 2252730Sbostic .word end 2352730Sbostic .globl _curbrk 2452730Sbostic_curbrk: 2552730Sbostic .word end 2652730Sbostic .text 2752730Sbostic 2852730SbosticLEAF(sbrk) 2952730Sbostic lw v1, _curbrk 3052730Sbostic li v0, SYS_brk 3152730Sbostic addu a0, a0, v1 # compute current break 3252730Sbostic syscall 3352730Sbostic bne a3, zero, 1f 3452730Sbostic move v0, v1 # return old val of _curbrk from above 3552730Sbostic sw a0, _curbrk # save current val of _curbrk from above 3652730Sbostic j ra 3752730Sbostic1: 3852730Sbostic j _cerror 3952730SbosticEND(sbrk) 40