1/* $NetBSD: ptrace.S,v 1.8 2006/01/06 20:38:01 uwe Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)ptrace.s 5.1 (Berkeley) 4/23/90 35 */ 36 37#include <machine/asm.h> 38#if defined(SYSLIBC_SCCS) && !defined(lint) 39 RCSID("$NetBSD: ptrace.S,v 1.8 2006/01/06 20:38:01 uwe Exp $") 40#endif /* SYSLIBC_SCCS and not lint */ 41 42#include "SYS.h" 43 44/* 45 * int 46 * ptrace(int request, pid_t pid, caddr_t addr, int data); 47 */ 48ENTRY(ptrace) 49#ifdef _REENTRANT 50 51 mov.l .L___errno, r1 52 PIC_PROLOGUE(.L_GOT) 53 sts.l pr, @-sp 54 mov.l r7, @-sp 55 mov.l r6, @-sp 56 mov.l r5, @-sp 571: CALL r1 58 mov.l r4, @-sp 59 mov.l @sp+, r4 60 mov.l @sp+, r5 61 mov.l @sp+, r6 62 mov.l @sp+, r7 63 lds.l @sp+, pr 64 PIC_EPILOGUE 65 66#else /* ! _REENTRANT */ 67 68#ifdef PIC 69 mova .L_GOT, r0 70 mov.l .L_GOT, r1 71 add r0, r1 72 mov.l .L_errno, r0 73 mov.l @(r0, r1), r0 74#else 75 mov.l .L_errno, r0 76#endif 77 78#endif /* ! _REENTRANT */ 79 80 mov #0, r1 81 mov.l r1, @r0 /* errno = 0; */ 82 83 mov #SYS_ptrace, r0 84 trapa #0x80 85 bf err 86 rts 87 nop 88err: 89 JUMP_CERROR 90 91 .align 2 92.L_GOT: 93 PIC_GOT_DATUM 94 95#ifdef _REENTRANT 96 .global _C_LABEL(__errno) 97.L___errno: 98 CALL_DATUM(_C_LABEL(__errno), 1b) 99 100#else /* ! _REENTRANT */ 101 .global _C_LABEL(errno) 102.L_errno: 103#ifdef PIC 104 .long PIC_GOT(_C_LABEL(errno)) 105#else 106 .long _C_LABEL(errno) 107#endif 108 109#endif /* ! _REENTRANT */ 110 111 SET_ENTRY_SIZE(ptrace) 112