sbrk.S revision 1.13
11.1Sragge/* 21.1Sragge * Copyright (c) 1983, 1993 31.1Sragge * The Regents of the University of California. All rights reserved. 41.1Sragge * 51.1Sragge * Redistribution and use in source and binary forms, with or without 61.1Sragge * modification, are permitted provided that the following conditions 71.1Sragge * are met: 81.1Sragge * 1. Redistributions of source code must retain the above copyright 91.1Sragge * notice, this list of conditions and the following disclaimer. 101.1Sragge * 2. Redistributions in binary form must reproduce the above copyright 111.1Sragge * notice, this list of conditions and the following disclaimer in the 121.1Sragge * documentation and/or other materials provided with the distribution. 131.10Sagc * 3. Neither the name of the University nor the names of its contributors 141.1Sragge * may be used to endorse or promote products derived from this software 151.1Sragge * without specific prior written permission. 161.1Sragge * 171.1Sragge * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181.1Sragge * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191.1Sragge * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201.1Sragge * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211.1Sragge * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221.1Sragge * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231.1Sragge * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241.1Sragge * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251.1Sragge * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261.1Sragge * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271.1Sragge * SUCH DAMAGE. 281.1Sragge */ 291.1Sragge 301.11Smatt#include "SYS.h" 311.11Smatt 321.1Sragge#if defined(SYSLIBC_SCCS) && !defined(lint) 331.1Sragge /* .asciz "@(#)sbrk.s 8.1 (Berkeley) 6/4/93" */ 341.13SriastradRCSID("$NetBSD: sbrk.S,v 1.13 2014/03/18 18:20:37 riastradh Exp $") 351.1Sragge#endif /* SYSLIBC_SCCS and not lint */ 361.1Sragge 371.8Skleink .globl _end 381.6Smatt .globl _C_LABEL(__minbrk) 391.12Smatt .globl _C_LABEL(__curbrk) 401.12Smatt .hidden _C_LABEL(__minbrk) 411.12Smatt .hidden _C_LABEL(__curbrk) 421.1Sragge 431.4Skleink#ifdef WEAK_ALIAS 441.4SkleinkWEAK_ALIAS(sbrk, _sbrk) 451.4Skleink#endif 461.4Skleink 471.1Sragge .data 481.6Smatt_C_LABEL(__minbrk): 491.8Skleink .long _end 501.12Smatt_C_LABEL(__curbrk): 511.8Skleink .long _end 521.1Sragge .text 531.1Sragge 541.4SkleinkENTRY(_sbrk, 0) 551.12Smatt moval _C_LABEL(__curbrk),%r5 561.12Smatt addl3 (%r5),4(%ap),-(%sp) 571.1Sragge pushl $1 581.9Smatt movl %ap,%r3 591.9Smatt movl %sp,%ap 601.1Sragge chmk $ SYS_break 611.1Sragge jcs err 621.12Smatt movl (%r5),%r0 631.12Smatt addl2 4(%r3),(%r5) 641.1Sragge ret 651.1Sraggeerr: 661.7Smatt jmp CERROR+2 671.11SmattEND(_sbrk) 68