1/*-
2 * Copyright (c) 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)profile.h	8.1 (Berkeley) 6/11/93
34 * $FreeBSD$
35 */
36
37#ifndef _MACHINE_PROFILE_H_
38#define	_MACHINE_PROFILE_H_
39
40/*
41 * Config generates something to tell the compiler to align functions on 32
42 * byte boundaries.  A strict alignment is good for keeping the tables small.
43 */
44#define	FUNCTION_ALIGNMENT	16
45
46
47#define	_MCOUNT_DECL void mcount
48
49typedef u_long	fptrdiff_t;
50
51/*
52 * Cannot implement mcount in C as GCC will trash the ip register when it
53 * pushes a trapframe. Pity we cannot insert assembly before the function
54 * prologue.
55 */
56
57#ifndef PLTSYM
58#define	PLTSYM
59#endif
60
61#define	MCOUNT								\
62	__asm__(".text");						\
63	__asm__(".align	2");						\
64	__asm__(".type	__mcount ,%function");				\
65	__asm__(".global	__mcount");				\
66	__asm__("__mcount:");						\
67	/*								\
68	 * Preserve registers that are trashed during mcount		\
69	 */								\
70	__asm__("stmfd	sp!, {r0-r3, ip, lr}");				\
71	/*								\
72	 * find the return address for mcount,				\
73	 * and the return address for mcount's caller.			\
74	 *								\
75	 * frompcindex = pc pushed by call into self.			\
76	 */								\
77	__asm__("mov	r0, ip");					\
78	/*								\
79	 * selfpc = pc pushed by mcount call				\
80	 */								\
81	__asm__("mov	r1, lr");					\
82	/*								\
83	 * Call the real mcount code					\
84	 */								\
85	__asm__("bl	mcount");					\
86	/*								\
87	 * Restore registers that were trashed during mcount		\
88	 */								\
89	__asm__("ldmfd	sp!, {r0-r3, lr}");				\
90	/*								\
91	 * Return to the caller. Loading lr and pc in one instruction	\
92	 * is deprecated on ARMv7 so we need this on it's own.		\
93	 */								\
94	__asm__("ldmfd	sp!, {pc}");
95void bintr(void);
96void btrap(void);
97void eintr(void);
98void user(void);
99
100#define	MCOUNT_FROMPC_USER(pc)					\
101	((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)
102
103#define	MCOUNT_FROMPC_INTR(pc)					\
104	((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ?	\
105	    ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr :	\
106		(uintfptr_t)btrap) : ~0U)
107
108
109#ifdef _KERNEL
110
111#define	MCOUNT_DECL(s)	register_t s;
112
113#include <machine/asm.h>
114#include <machine/cpufunc.h>
115/*
116 * splhigh() and splx() are heavyweight, and call mcount().  Therefore
117 * we disabled interrupts (IRQ, but not FIQ) directly on the CPU.
118 *
119 * We're lucky that the CPSR and 's' both happen to be 'int's.
120 */
121#define	MCOUNT_ENTER(s)	{s = intr_disable(); }	/* kill IRQ */
122#define	MCOUNT_EXIT(s)	{intr_restore(s); }	/* restore old value */
123
124void	mcount(uintfptr_t frompc, uintfptr_t selfpc);
125
126#else
127typedef	u_int	uintfptr_t;
128#endif /* _KERNEL */
129
130#endif /* !_MACHINE_PROFILE_H_ */
131