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
36#ifndef _MACHINE_PROFILE_H_
37#define _MACHINE_PROFILE_H_
38
39/*
40 * Config generates something to tell the compiler to align functions on 32
41 * byte boundaries. A strict alignment is good for keeping the tables small.
42 */
43#define FUNCTION_ALIGNMENT 16
44
45#define _MCOUNT_DECL void mcount
46
47typedef u_long fptrdiff_t;
48
49/*
50 * Cannot implement mcount in C as GCC will trash the ip register when it
51 * pushes a trapframe. Pity we cannot insert assembly before the function
52 * prologue.
53 */
54
55#ifndef PLTSYM
56#define PLTSYM
57#endif
58
59#define MCOUNT \
60 __asm__(".text"); \
61 __asm__(".align 2"); \
62 __asm__(".type __mcount ,%function"); \
63 __asm__(".global __mcount"); \
64 __asm__("__mcount:"); \
65 /* \
66 * Preserve registers that are trashed during mcount \
67 */ \
68 __asm__("stmfd sp!, {r0-r3, ip, lr}"); \
69 /* \
70 * find the return address for mcount, \
71 * and the return address for mcount's caller. \
72 * \
73 * frompcindex = pc pushed by call into self. \
74 */ \
75 __asm__("mov r0, ip"); \
76 /* \
77 * selfpc = pc pushed by mcount call \
78 */ \
79 __asm__("mov r1, lr"); \
80 /* \
81 * Call the real mcount code \
82 */ \
83 __asm__("bl mcount"); \
84 /* \
85 * Restore registers that were trashed during mcount \
86 */ \
87 __asm__("ldmfd sp!, {r0-r3, lr}"); \
88 /* \
89 * Return to the caller. Loading lr and pc in one instruction \
90 * is deprecated on ARMv7 so we need this on its own. \
91 */ \
92 __asm__("ldmfd sp!, {pc}");
93void bintr(void);
94void btrap(void);
95void eintr(void);
96void user(void);
97
98#define MCOUNT_FROMPC_USER(pc) \
99 ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)
100
101#define MCOUNT_FROMPC_INTR(pc) \
102 ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \
103 ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \
104 (uintfptr_t)btrap) : ~0U)
105
106#ifdef _KERNEL
107
108#define MCOUNT_DECL(s) register_t s;
109
110#include <machine/asm.h>
111#include <machine/cpufunc.h>
112#define MCOUNT_ENTER(s) {s = intr_disable(); } /* kill IRQ */
113#define MCOUNT_EXIT(s) {intr_restore(s); } /* restore old value */
114
115void mcount(uintfptr_t frompc, uintfptr_t selfpc);
116
117#else
118typedef u_int uintfptr_t;
119#endif /* _KERNEL */
120
121#endif /* !_MACHINE_PROFILE_H_ */