1/*- 2 * Copyright (c) 1990, 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 * William Jolitz. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11#if defined(SYSLIBC_SCCS) && !defined(lint) 12 .asciz "@(#)brk.s 8.1 (Berkeley) 06/04/93" 13#endif /* SYSLIBC_SCCS and not lint */ 14 15#include "SYS.h" 16 17#define SYS_brk 17 18 19 .globl curbrk 20 .globl minbrk 21ENTRY(_brk) 22 jmp ok 23 24ENTRY(brk) 25 movl 4(%esp),%eax 26 cmpl %eax,minbrk 27 jl ok 28 movl minbrk,%eax 29 movl %eax,4(%esp) 30ok: 31 lea SYS_brk,%eax 32 LCALL(7,0) 33 jb err 34 movl 4(%esp),%eax 35 movl %eax,curbrk 36 movl $0,%eax 37 ret 38err: 39 jmp cerror 40