1252190Srpaulo/* $NetBSD: ptrace.S,v 1.7 2016/03/19 21:27:38 christos Exp $ */ 2252190Srpaulo 3252190Srpaulo/*- 4252190Srpaulo * Copyright (c) 1990 The Regents of the University of California. 5252190Srpaulo * All rights reserved. 6252190Srpaulo * 7252190Srpaulo * This code is derived from software contributed to Berkeley by 8252190Srpaulo * William Jolitz. 9252190Srpaulo * 10252190Srpaulo * Redistribution and use in source and binary forms, with or without 11252190Srpaulo * modification, are permitted provided that the following conditions 12252190Srpaulo * are met: 13252190Srpaulo * 1. Redistributions of source code must retain the above copyright 14252190Srpaulo * notice, this list of conditions and the following disclaimer. 15252190Srpaulo * 2. Redistributions in binary form must reproduce the above copyright 16252190Srpaulo * notice, this list of conditions and the following disclaimer in the 17252190Srpaulo * documentation and/or other materials provided with the distribution. 18252190Srpaulo * 3. Neither the name of the University nor the names of its contributors 19252190Srpaulo * may be used to endorse or promote products derived from this software 20252190Srpaulo * without specific prior written permission. 21252190Srpaulo * 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 1.7 2016/03/19 21:27:38 christos Exp $") 40#endif /* SYSLIBC_SCCS and not lint */ 41 42#include "SYS.h" 43 44 .globl _C_LABEL(__errno) 45 46ENTRY(ptrace) 47 /* 48 * The following code calls __errno() to set it to 0 before 49 * calling ptrace(2). Preserve and restore all the parameters 50 */ 51 pushq %rdi 52 pushq %rsi 53 pushq %rdx 54 pushq %rcx 55#ifdef __PIC__ 56 call PIC_PLT(_C_LABEL(__errno)) 57#else 58 call _C_LABEL(__errno) 59#endif /* __PIC__ */ 60 popq %rcx 61 popq %rdx 62 popq %rsi 63 popq %rdi 64 SYSTRAP(ptrace) 65 jc err 66 ret 67err: 68 jmp CERROR 69END(ptrace) 70