xref: /openbsd-src/sys/arch/m88k/include/profile.h (revision b9cd420ee2e86346bae3e3990197b4010c03055c)
1 #ifndef _M88K_PROFILE_H_
2 #define _M88K_PROFILE_H_
3 /*	$OpenBSD: profile.h,v 1.7 2013/02/14 05:56:02 miod Exp $ */
4 /*
5  * Copyright (c) 2004, Miodrag Vallat.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #define	_MCOUNT_DECL void _mcount
30 
31 /*
32  * On OpenBSD, calls to the function profiler save r2-r9 on stack. The
33  * monitor point is found in r2. The function's return address is taken
34  * from the stack frame pointed to by r30, and needs to be restored as
35  * r1 hasn't have had a chance to be saved yet.
36  */
37 
38 #ifdef __PIC__
39 #define	MCOUNT_SYMBOL	"_mcount#plt"
40 #else
41 #define	MCOUNT_SYMBOL	"_mcount"
42 #endif
43 
44 #define MCOUNT								\
45 __asm__ (".text;"							\
46 	 ".align 3;"							\
47 	 ".globl __mcount;"						\
48 	 ".type  __mcount,@function;"					\
49 	 "__mcount:"							\
50 	 "	subu	%r31, %r31, 16;"				\
51 	 "	st	%r1,  %r31, 4;"					\
52 	 "	bsr.n	" MCOUNT_SYMBOL ";"				\
53 	 "	 ld	%r3,  %r30, 4;"	/* function return address */	\
54 	 "	ld	%r2,  %r31, 4;"					\
55 	 "	addu	%r31, %r31, 16;"				\
56 	 "	jmp.n	%r2;"						\
57 	 "	 ld	%r1,  %r30, 4;"	/* restore r1 */		\
58 	 ".size	__mcount, .-__mcount");
59 
60 #ifdef _KERNEL
61 #define	MCOUNT_ENTER	do { s = get_psr(); set_psr(s | PSR_IND); } while (0)
62 #define	MCOUNT_EXIT	set_psr(s)
63 #endif /* _KERNEL */
64 
65 #endif /* _M88K_PROFILE_H_ */
66