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ptrace.S revision 1.4 
      1 /*	$NetBSD: ptrace.S,v 1.4 1998/07/01 02:16:28 tv Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  *
     39  * from: Header: ptrace.s,v 1.2 91/12/20 01:59:00 leres Exp
     40  */
     41 
     42 #include <machine/asm.h>
     43 #if defined(SYSLIBC_SCCS) && !defined(lint)
     44 #if 0
     45 	.asciz "@(#)ptrace.s	8.1 (Berkeley) 6/4/93"
     46 #else
     47 	RCSID("$NetBSD: ptrace.S,v 1.4 1998/07/01 02:16:28 tv Exp $")
     48 #endif
     49 #endif /* SYSLIBC_SCCS and not lint */
     50 
     51 #include "SYS.h"
     52 
     53 ENTRY(ptrace)
     54 #ifdef PIC
     55 	PIC_PROLOGUE(%g1,%g2)
     56 	ld	[%g1 + _C_LABEL(errno)], %g1
     57 	st	%g0, [%g1]
     58 #else
     59 	sethi	%hi(_C_LABEL(errno)), %g1
     60 	st	%g0, [%g1 + %lo(_C_LABEL(errno))]
     61 #endif
     62 	mov	SYS_ptrace, %g1
     63 	t	ST_SYSCALL
     64 	bcc	1f
     65 	nop
     66 	ERROR()
     67 1:
     68 	retl
     69 	nop
     70