1/* $NetBSD: ptrace.S,v 1.5 2002/08/17 19:54:32 thorpej 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: @(#)ptrace.s 5.1 (Berkeley) 4/23/90 36 */ 37 38#include "SYS.h" 39 40ENTRY(ptrace) 41#ifdef _REENTRANT 42 stmfd sp!, {r0-r3, lr} 43 sub sp, sp, #4 /* align stack */ 44 bl PIC_SYM(_C_LABEL(__errno), PLT) 45 add sp, sp, #4 /* unalign stack */ 46 mov r1, #0x00000000 47 str r1, [r0] 48 ldmfd sp!, {r0-r3, lr} 49#else 50 stmfd sp!, {r0, r1} 51#ifdef PIC 52 /* Setup the GOT */ 53 ldr r0, .Lgot 54 add r0, pc, r0 55.L1: 56 ldr r1, .Lerrno 57 ldr r1, [r0, r1] 58#else 59 ldr r1, .Lerrno 60#endif /* PIC */ 61 mov r0, #0x00000000 62 str r0, [r1] 63 ldmfd sp!, {r0, r1} 64#endif /* _REENTRANT */ 65 66 SYSTRAP(ptrace) 67 bcs PIC_SYM(CERROR, PLT) 68#ifdef __APCS_26__ 69 movs pc, lr 70#else 71 mov pc, lr 72#endif 73 74#ifndef _REENTRANT 75#ifdef PIC 76 .align 0 77.Lgot: 78 .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (.L1+4)) 79#endif /* PIC */ 80 81.Lerrno: 82 .word PIC_SYM(_C_LABEL(errno), GOT) 83#endif /* !_REENTRANT */ 84