1*41013Swilliam/*- 2*41013Swilliam * Copyright (c) 1990 The Regents of the University of California. 3*41013Swilliam * All rights reserved. 4*41013Swilliam * 5*41013Swilliam * This code is derived from software contributed to Berkeley by 6*41013Swilliam * William Jolitz. 7*41013Swilliam * 8*41013Swilliam * %sccs.include.redist.c% 9*41013Swilliam */ 10*41013Swilliam 11*41013Swilliam#if defined(SYSLIBC_SCCS) && !defined(lint) 12*41013Swilliam .asciz "@(#)brk.s 5.1 (Berkeley) 04/23/90" 13*41013Swilliam#endif /* SYSLIBC_SCCS and not lint */ 14*41013Swilliam 15*41013Swilliam#include "SYS.h" 16*41013Swilliam 17*41013Swilliam#define SYS_brk 17 18*41013Swilliam 19*41013Swilliam .globl curbrk 20*41013Swilliam .globl minbrk 21*41013SwilliamENTRY(_brk) 22*41013Swilliam jmp ok 23*41013Swilliam 24*41013SwilliamENTRY(brk) 25*41013Swilliam movl 4(%esp),%eax 26*41013Swilliam cmpl %eax,minbrk 27*41013Swilliam jge ok 28*41013Swilliam movl minbrk,%eax 29*41013Swilliam movl %eax,4(%esp) 30*41013Swilliamok: 31*41013Swilliam lea SYS_brk,%eax 32*41013Swilliam LCALL(7,0) 33*41013Swilliam jb err 34*41013Swilliam movl 4(%esp),%eax 35*41013Swilliam movl %eax,curbrk 36*41013Swilliam movl $0,%eax 37*41013Swilliam ret 38*41013Swilliamerr: 39*41013Swilliam jmp cerror 40