1134287Smarcel/*
2134287Smarcel * Copyright (c) 2004 Marcel Moolenaar
3134287Smarcel * All rights reserved.
4134287Smarcel *
5134287Smarcel * Redistribution and use in source and binary forms, with or without
6134287Smarcel * modification, are permitted provided that the following conditions
7134287Smarcel * are met:
8134287Smarcel *
9134287Smarcel * 1. Redistributions of source code must retain the above copyright
10134287Smarcel *    notice, this list of conditions and the following disclaimer.
11134287Smarcel * 2. Redistributions in binary form must reproduce the above copyright
12134287Smarcel *    notice, this list of conditions and the following disclaimer in the
13134287Smarcel *    documentation and/or other materials provided with the distribution.
14134287Smarcel *
15134287Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16134287Smarcel * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17134287Smarcel * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18134287Smarcel * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19134287Smarcel * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20134287Smarcel * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21134287Smarcel * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22134287Smarcel * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23134287Smarcel * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24134287Smarcel * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25134287Smarcel */
26134287Smarcel
27134287Smarcel#include <machine/asm.h>
28134287Smarcel__FBSDID("$FreeBSD$");
29134287Smarcel
30134287Smarcel	.text
31134287Smarcel
32134287Smarcel/*
33134287Smarcel * Important registers:
34134287Smarcel *	r8	structure return address
35134287Smarcel *	r15	static link (nested routines)
36134287Smarcel *	rp	our return address
37134287Smarcel *	in0	caller's ar.pfs
38134287Smarcel *	in1	caller's gp
39134287Smarcel *	in2	caller's rp
40134287Smarcel *	in3	GOT entry
41134287Smarcel *	ar.pfs	our pfs
42134287Smarcel */
43134287SmarcelENTRY_NOPROFILE(_mcount, 4)
44134287Smarcel	alloc		loc0 = ar.pfs, 4, 4, 2, 0
45134287Smarcel	mov		loc1 = r8
46134287Smarcel	mov		loc2 = rp
47134287Smarcel	mov		loc3 = r15
48134287Smarcel	;;
49134287Smarcel	mov		out0 = in2
50134287Smarcel	mov		out1 = rp
51134287Smarcel	br.call.sptk	rp = __mcount
52134287Smarcel	;;
53134287Smarcel1:
54134287Smarcel	mov		gp = in1
55134287Smarcel	mov		r14 = ip
56134287Smarcel	mov		b7 = loc2
57134287Smarcel	;;
58134287Smarcel	add		r14 = 2f - 1b, r14
59134287Smarcel	mov		ar.pfs = loc0
60134287Smarcel	mov		rp = in2
61134287Smarcel	;;
62134287Smarcel	mov		r15 = loc3
63134287Smarcel	mov		b7 = r14
64134287Smarcel	mov		b6 = loc2
65134287Smarcel	mov		r8 = loc1
66134287Smarcel	mov		r14 = in0
67134287Smarcel	br.ret.sptk	b7
68134287Smarcel	;;
69134287Smarcel2:
70134287Smarcel	mov		ar.pfs = r14
71134287Smarcel	br.sptk		b6
72134287Smarcel	;;
73134287SmarcelEND(_mcount)
74134287Smarcel
75134287SmarcelWEAK_ALIAS(mcount, _mcount)
76