1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ralph Campbell. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11#include "SYS.h" 12 13#if defined(LIBC_SCCS) && !defined(lint) 14 ASMSTR("@(#)sbrk.s 8.1 (Berkeley) 06/04/93") 15#endif /* LIBC_SCCS and not lint */ 16 17#define SYS_brk 17 18 19 .data 20 .globl minbrk 21minbrk: 22 .word end 23 .globl curbrk 24curbrk: 25 .word end 26 .text 27 28LEAF(sbrk) 29 lw v1, curbrk 30 li v0, SYS_brk 31 addu a0, a0, v1 # compute current break 32 syscall 33 bne a3, zero, 1f 34 move v0, v1 # return old val of _curbrk from above 35 sw a0, curbrk # save current val of _curbrk from above 36 j ra 371: 38 j _cerror 39END(sbrk) 40