/* $NetBSD: brk.S,v 1.11 2013/09/12 15:36:16 joerg Exp $ */ /*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)brk.s 5.2 (Berkeley) 12/17/90 */ #include <machine/asm.h> #if defined(SYSLIBC_SCCS) && !defined(lint) RCSID("$NetBSD: brk.S,v 1.11 2013/09/12 15:36:16 joerg Exp $") #endif /* SYSLIBC_SCCS and not lint */ #include "SYS.h" #ifdef WEAK_ALIAS WEAK_ALIAS(brk,_brk) #endif .data .globl _C_LABEL(__minbrk) .align 2 _C_LABEL(__minbrk): .long _end .text ENTRY(_brk) #ifdef __PIC__ mova L_GOT, r0 mov.l L_GOT, r2 add r0, r2 mov.l Lminbrk, r0 mov.l @(r0, r2), r0 mov.l @r0, r0 #else mov.l Lminbrk, r0 mov.l @r0, r0 #endif cmp/hs r4, r0 bf 1f mov r0, r4 1: mov.l LSYS_break, r0 trapa #0x80 bf err #ifdef __PIC__ mov.l Lcurbrk, r0 mov.l @(r0, r2), r1 xor r0, r0 #else xor r0, r0 mov.l Lcurbrk, r1 #endif rts mov.l r4, @r1 err: JUMP_CERROR .align 2 LSYS_break: .long SYS_break #ifdef __PIC__ L_GOT: .long _GLOBAL_OFFSET_TABLE_ Lminbrk: .long _C_LABEL(__minbrk)@GOT Lcurbrk: .long curbrk@GOT #else Lminbrk: .long _C_LABEL(__minbrk) Lcurbrk: .long curbrk #endif SET_ENTRY_SIZE(_brk) |