141013Swilliam/*- 241013Swilliam * Copyright (c) 1990 The Regents of the University of California. 341013Swilliam * All rights reserved. 441013Swilliam * 541013Swilliam * This code is derived from software contributed to Berkeley by 641013Swilliam * William Jolitz. 741013Swilliam * 841013Swilliam * %sccs.include.redist.c% 941013Swilliam */ 1041013Swilliam 1141013Swilliam#if defined(SYSLIBC_SCCS) && !defined(lint) 12*45828Swilliam .asciz "@(#)brk.s 5.2 (Berkeley) 12/17/90" 1341013Swilliam#endif /* SYSLIBC_SCCS and not lint */ 1441013Swilliam 1541013Swilliam#include "SYS.h" 1641013Swilliam 1741013Swilliam#define SYS_brk 17 1841013Swilliam 1941013Swilliam .globl curbrk 2041013Swilliam .globl minbrk 2141013SwilliamENTRY(_brk) 2241013Swilliam jmp ok 2341013Swilliam 2441013SwilliamENTRY(brk) 2541013Swilliam movl 4(%esp),%eax 2641013Swilliam cmpl %eax,minbrk 27*45828Swilliam jl ok 2841013Swilliam movl minbrk,%eax 2941013Swilliam movl %eax,4(%esp) 3041013Swilliamok: 3141013Swilliam lea SYS_brk,%eax 3241013Swilliam LCALL(7,0) 3341013Swilliam jb err 3441013Swilliam movl 4(%esp),%eax 3541013Swilliam movl %eax,curbrk 3641013Swilliam movl $0,%eax 3741013Swilliam ret 3841013Swilliamerr: 3941013Swilliam jmp cerror 40