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/* $NetBSD: ptrace.S,v 1.9 2003/08/07 16:42:17 agc Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD: src/lib/libc/mips/sys/ptrace.S,v 1.3.2.2.2.1 2010/12/21 17:09:25 kensmith Exp $");
#include "SYS.h"
#if defined(LIBC_SCCS) && !defined(lint)
ASMSTR("from: @(#)ptrace.s 8.1 (Berkeley) 6/4/93")
ASMSTR("$NetBSD: ptrace.S,v 1.9 2003/08/07 16:42:17 agc Exp $")
#endif /* LIBC_SCCS and not lint */
NESTED_NOPROFILE(ptrace, CALLFRAME_SIZ, ra)
.mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
SETUP_GP
PTR_SUBU sp, sp, CALLFRAME_SIZ
SETUP_GP64(CALLFRAME_GP, ptrace)
SAVE_GP(CALLFRAME_GP)
PTR_S ra, CALLFRAME_RA(sp)
PTR_LA t9, _C_LABEL(__error) # locate address of errno
jalr t9
PTR_L ra, CALLFRAME_RA(sp)
INT_S zero, 0(v0) # update errno value
li v0, SYS_ptrace
syscall
# Load __cerror's address using our gp, then restore it.
PTR_LA t9, __cerror
RESTORE_GP64
PTR_ADDU sp, sp, CALLFRAME_SIZ
bne a3, zero, 1f
j ra
1: j t9
END(ptrace)
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