ptrace.S revision 1.11 
11.11Schristos/*	$NetBSD: ptrace.S,v 1.11 1999/02/08 18:56:48 christos Exp $	*/
21.7Schristos
31.1Scgd/*-
41.1Scgd * Copyright (c) 1990 The Regents of the University of California.
51.1Scgd * All rights reserved.
61.1Scgd *
71.1Scgd * This code is derived from software contributed to Berkeley by
81.1Scgd * William Jolitz.
91.1Scgd *
101.1Scgd * Redistribution and use in source and binary forms, with or without
111.1Scgd * modification, are permitted provided that the following conditions
121.1Scgd * are met:
131.1Scgd * 1. Redistributions of source code must retain the above copyright
141.1Scgd *    notice, this list of conditions and the following disclaimer.
151.1Scgd * 2. Redistributions in binary form must reproduce the above copyright
161.1Scgd *    notice, this list of conditions and the following disclaimer in the
171.1Scgd *    documentation and/or other materials provided with the distribution.
181.1Scgd * 3. All advertising materials mentioning features or use of this software
191.1Scgd *    must display the following acknowledgement:
201.1Scgd *	This product includes software developed by the University of
211.1Scgd *	California, Berkeley and its contributors.
221.1Scgd * 4. Neither the name of the University nor the names of its contributors
231.1Scgd *    may be used to endorse or promote products derived from this software
241.1Scgd *    without specific prior written permission.
251.1Scgd *
261.1Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
271.1Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
281.1Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
291.1Scgd * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
301.1Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
311.1Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
321.1Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
331.1Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
341.1Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
351.1Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
361.1Scgd * SUCH DAMAGE.
371.2Sjtc *
381.2Sjtc *	from: @(#)ptrace.s	5.1 (Berkeley) 4/23/90
391.1Scgd */
401.1Scgd
411.7Schristos#include <machine/asm.h>
421.1Scgd#if defined(SYSLIBC_SCCS) && !defined(lint)
431.11Schristos	RCSID("$NetBSD: ptrace.S,v 1.11 1999/02/08 18:56:48 christos Exp $")
441.1Scgd#endif /* SYSLIBC_SCCS and not lint */
451.1Scgd
461.1Scgd#include "SYS.h"
471.1Scgd
481.9Skleink#ifdef _REENTRANT
491.9Skleink	.globl	_C_LABEL(__errno)
501.9Skleink#else
511.9Skleink	.globl	_C_LABEL(errno)
521.9Skleink#endif
531.9Skleink
541.1ScgdENTRY(ptrace)
551.9Skleink#ifdef _REENTRANT
561.9Skleink#ifdef PIC
571.9Skleink	PIC_PROLOGUE
581.9Skleink	call	PIC_PLT(_C_LABEL(__errno))
591.9Skleink	PIC_EPILOGUE
601.9Skleink#else
611.9Skleink	call	_C_LABEL(__errno)
621.9Skleink#endif /* PIC */
631.9Skleink	xorl	%ecx,%ecx
641.9Skleink	movl	%ecx,(%eax)
651.9Skleink#else
661.5Smycroft#ifdef PIC
671.1Scgd	xorl	%eax,%eax
681.1Scgd	PIC_PROLOGUE
691.8Sthorpej	movl	PIC_GOT(_C_LABEL(errno)),%edx
701.5Smycroft	PIC_EPILOGUE
711.1Scgd	movl	%eax,(%edx)
721.1Scgd#else
731.8Sthorpej	movl	$0,_C_LABEL(errno)
741.9Skleink#endif /* PIC */
751.9Skleink#endif /* _REENTRANT */
761.4Smycroft	movl	$(SYS_ptrace),%eax
771.6Smycroft	int	$0x80
781.5Smycroft	jc	err
791.1Scgd	ret
801.1Scgderr:
811.5Smycroft#ifdef PIC
821.11Schristos	PIC_PROLOGUE
831.10Skleink	jmp	PIC_PLT(CERROR)
841.5Smycroft#else
851.10Skleink	jmp	CERROR
861.5Smycroft#endif
87