1/* $NetBSD: ptrace.S,v 1.8 2004/08/21 11:30:17 rearnsha Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * from: @(#)ptrace.s 5.1 (Berkeley) 4/23/90 32 */ 33 34#include "SYS.h" 35 36ENTRY(ptrace) 37#ifdef _REENTRANT 38 stmfd sp!, {r0-r3, lr} 39 sub sp, sp, #4 /* align stack */ 40 bl PIC_SYM(_C_LABEL(__errno), PLT) 41 add sp, sp, #4 /* unalign stack */ 42 mov r1, #0x00000000 43 str r1, [r0] 44 ldmfd sp!, {r0-r3, lr} 45#else 46 stmfd sp!, {r0, r1} 47#ifdef PIC 48 /* Setup the GOT */ 49 ldr r0, .Lgot 50 add r0, pc, r0 51.L1: 52 ldr r1, .Lerrno 53 ldr r1, [r0, r1] 54#else 55 ldr r1, .Lerrno 56#endif /* PIC */ 57 mov r0, #0x00000000 58 str r0, [r1] 59 ldmfd sp!, {r0, r1} 60#endif /* _REENTRANT */ 61 62 SYSTRAP(ptrace) 63 bcs PIC_SYM(CERROR, PLT) 64 RET 65 66#ifndef _REENTRANT 67#ifdef PIC 68 .align 0 69.Lgot: 70 .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (.L1+4)) 71#endif /* PIC */ 72 73.Lerrno: 74 .word PIC_SYM(_C_LABEL(errno), GOT) 75#endif /* !_REENTRANT */ 76