11849Swollman/*- 21849Swollman * Copyright (c) 1990 The Regents of the University of California. 31849Swollman * All rights reserved. 41849Swollman * 51849Swollman * This code is derived from software contributed to Berkeley by 61849Swollman * William Jolitz. 71849Swollman * 81849Swollman * Redistribution and use in source and binary forms, with or without 91849Swollman * modification, are permitted provided that the following conditions 101849Swollman * are met: 111849Swollman * 1. Redistributions of source code must retain the above copyright 121849Swollman * notice, this list of conditions and the following disclaimer. 131849Swollman * 2. Redistributions in binary form must reproduce the above copyright 141849Swollman * notice, this list of conditions and the following disclaimer in the 151849Swollman * documentation and/or other materials provided with the distribution. 161849Swollman * 4. Neither the name of the University nor the names of its contributors 171849Swollman * may be used to endorse or promote products derived from this software 181849Swollman * without specific prior written permission. 191849Swollman * 201849Swollman * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211849Swollman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221849Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231849Swollman * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241849Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251849Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261849Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271849Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281849Swollman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291849Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301849Swollman * SUCH DAMAGE. 311849Swollman */ 321849Swollman 3392999Sobrien#if defined(SYSLIBC_SCCS) && !defined(lint) 3492999Sobrien .asciz "@(#)brk.s 5.2 (Berkeley) 12/17/90" 3592999Sobrien#endif /* SYSLIBC_SCCS and not lint */ 3692999Sobrien#include <machine/asm.h> 3792999Sobrien__FBSDID("$FreeBSD$"); 381849Swollman 391849Swollman#include "SYS.h" 401849Swollman 4115634Speter .globl HIDENAME(curbrk) 4215634Speter .globl HIDENAME(minbrk) 431849SwollmanENTRY(_brk) 441849Swollman jmp ok 45184548SpeterEND(_brk) 461849Swollman 471849SwollmanENTRY(brk) 481849Swollman#ifdef PIC 491849Swollman movl 4(%esp),%eax 501849Swollman PIC_PROLOGUE 5115634Speter movl PIC_GOT(HIDENAME(curbrk)),%edx # set up GOT addressing 5215634Speter movl PIC_GOT(HIDENAME(minbrk)),%ecx # 5316719Sbde PIC_EPILOGUE 541849Swollman cmpl %eax,(%ecx) 5516719Sbde jbe ok 561849Swollman movl (%ecx),%eax 571849Swollman movl %eax,4(%esp) 581849Swollmanok: 5987006Sjhb mov $SYS_break,%eax 6015634Speter KERNCALL 61240152Sjilles jb HIDENAME(cerror) 621849Swollman movl 4(%esp),%eax 631849Swollman movl %eax,(%edx) 641849Swollman movl $0,%eax 651849Swollman ret 661849Swollman 671849Swollman#else 681849Swollman 691849Swollman movl 4(%esp),%eax 7015634Speter cmpl %eax,HIDENAME(minbrk) 7116719Sbde jbe ok 7215634Speter movl HIDENAME(minbrk),%eax 731849Swollman movl %eax,4(%esp) 741849Swollmanok: 7587006Sjhb mov $SYS_break,%eax 7615634Speter KERNCALL 77240152Sjilles jb HIDENAME(cerror) 781849Swollman movl 4(%esp),%eax 7915634Speter movl %eax,HIDENAME(curbrk) 801849Swollman movl $0,%eax 811849Swollman ret 821849Swollman#endif 83184548SpeterEND(brk) 84217106Skib 85217106Skib .section .note.GNU-stack,"",%progbits 86