1*84d9c625SLionel Sambuc/* $NetBSD: ptrace.S,v 1.12 2013/11/30 20:20:42 joerg Exp $ */ 22fe8fb19SBen Gras 32fe8fb19SBen Gras/*- 42fe8fb19SBen Gras * Copyright (c) 1990 The Regents of the University of California. 52fe8fb19SBen Gras * All rights reserved. 62fe8fb19SBen Gras * 72fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 82fe8fb19SBen Gras * modification, are permitted provided that the following conditions 92fe8fb19SBen Gras * are met: 102fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 112fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 122fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 132fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 142fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 152fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors 162fe8fb19SBen Gras * may be used to endorse or promote products derived from this software 172fe8fb19SBen Gras * without specific prior written permission. 182fe8fb19SBen Gras * 192fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 202fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 212fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 222fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 232fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 242fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 252fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 262fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 272fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 282fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 292fe8fb19SBen Gras * SUCH DAMAGE. 302fe8fb19SBen Gras * 312fe8fb19SBen Gras * from: @(#)ptrace.s 5.1 (Berkeley) 4/23/90 322fe8fb19SBen Gras */ 332fe8fb19SBen Gras 342fe8fb19SBen Gras#include "SYS.h" 352fe8fb19SBen Gras 362fe8fb19SBen GrasENTRY(ptrace) 372fe8fb19SBen Gras#ifdef _REENTRANT 38*84d9c625SLionel Sambuc#if !defined(__thumb__) || defined(_ARM_ARCH_T2) 39*84d9c625SLionel Sambuc push {r0-r3, lr} 402fe8fb19SBen Gras#else 41*84d9c625SLionel Sambuc push {r0-r4} 42*84d9c625SLionel Sambuc mov r4, lr 43*84d9c625SLionel Sambuc#endif 44*84d9c625SLionel Sambuc sub sp, sp, #4 /* align stack */ 45*84d9c625SLionel Sambuc bl PLT_SYM(_C_LABEL(__errno)) 46*84d9c625SLionel Sambuc add sp, sp, #4 /* unalign stack */ 47*84d9c625SLionel Sambuc movs r1, #0 48*84d9c625SLionel Sambuc str r1, [r0] 49*84d9c625SLionel Sambuc#if !defined(__thumb__) || defined(_ARM_ARCH_T2) 50*84d9c625SLionel Sambuc pop {r0-r3, lr} 51*84d9c625SLionel Sambuc#else 52*84d9c625SLionel Sambuc mov lr, r4 53*84d9c625SLionel Sambuc pop {r0-r4} 54*84d9c625SLionel Sambuc#endif 55*84d9c625SLionel Sambuc#else 56*84d9c625SLionel Sambuc push {r0, r1} 57*84d9c625SLionel Sambuc#ifdef __PIC__ 582fe8fb19SBen Gras /* Setup the GOT */ 592fe8fb19SBen Gras ldr r0, .Lgot 60*84d9c625SLionel Sambuc adr r1, .Lgot 61*84d9c625SLionel Sambuc add r0, r0, r1 622fe8fb19SBen Gras ldr r1, .Lerrno 632fe8fb19SBen Gras ldr r1, [r0, r1] 642fe8fb19SBen Gras#else 652fe8fb19SBen Gras ldr r1, .Lerrno 66*84d9c625SLionel Sambuc#endif /* __PIC__ */ 67*84d9c625SLionel Sambuc movs r0, #0 682fe8fb19SBen Gras str r0, [r1] 69*84d9c625SLionel Sambuc pop {r0, r1} 702fe8fb19SBen Gras#endif /* _REENTRANT */ 712fe8fb19SBen Gras 722fe8fb19SBen Gras SYSTRAP(ptrace) 73*84d9c625SLionel Sambuc _INVOKE_CERROR() 742fe8fb19SBen Gras RET 752fe8fb19SBen Gras 762fe8fb19SBen Gras#ifndef _REENTRANT 77*84d9c625SLionel Sambuc#ifdef __PIC__ 782fe8fb19SBen Gras .align 0 792fe8fb19SBen Gras.Lgot: 80*84d9c625SLionel Sambuc .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - .Lgot 81*84d9c625SLionel Sambuc#endif /* __PIC__ */ 822fe8fb19SBen Gras 832fe8fb19SBen Gras.Lerrno: 842fe8fb19SBen Gras .word PIC_SYM(_C_LABEL(errno), GOT) 852fe8fb19SBen Gras#endif /* !_REENTRANT */ 86*84d9c625SLionel SambucEND(ptrace) 87