1/*-
  2 * SPDX-License-Identifier: BSD-4-Clause
  3 *
  4 * Copyright (c) 1992, 1993
  5 *	The Regents of the University of California.  All rights reserved.
  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 * 3. All advertising materials mentioning features or use of this software
 16 *    must display the following acknowledgement:
 17 *	This product includes software developed by the University of
 18 *	California, Berkeley and its contributors.
 19 * 4. Neither the name of the University nor the names of its contributors
 20 *    may be used to endorse or promote products derived from this software
 21 *    without specific prior written permission.
 22 *
 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 33 * SUCH DAMAGE.
 34 *
 35 *	@(#)profile.h	8.1 (Berkeley) 6/11/93
 36 */
 37
 38#ifndef _MACHINE_PROFILE_H_
 39#define	_MACHINE_PROFILE_H_
 40
 41/*
 42 * Config generates something to tell the compiler to align functions on 32
 43 * byte boundaries.  A strict alignment is good for keeping the tables small.
 44 */
 45#define	FUNCTION_ALIGNMENT	16
 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 its 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#ifdef _KERNEL
109
110#define	MCOUNT_DECL(s)	register_t s;
111
112#include <machine/asm.h>
113#include <machine/cpufunc.h>
114#define	MCOUNT_ENTER(s)	{s = intr_disable(); }	/* kill IRQ */
115#define	MCOUNT_EXIT(s)	{intr_restore(s); }	/* restore old value */
116
117void	mcount(uintfptr_t frompc, uintfptr_t selfpc);
118
119#else
120typedef	u_int	uintfptr_t;
121#endif /* _KERNEL */
122
123#endif /* !_MACHINE_PROFILE_H_ */