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 * $FreeBSD: releng/12.0/sys/arm/include/profile.h 325966 2017-11-18 14:26:50Z pfg $
37 */
38
39 #ifndef _MACHINE_PROFILE_H_
40 #define _MACHINE_PROFILE_H_
41
42 /*
43 * Config generates something to tell the compiler to align functions on 32
44 * byte boundaries. A strict alignment is good for keeping the tables small.
45 */
46 #define FUNCTION_ALIGNMENT 16
47
48
49 #define _MCOUNT_DECL void mcount
50
51 typedef u_long fptrdiff_t;
52
53 /*
54 * Cannot implement mcount in C as GCC will trash the ip register when it
55 * pushes a trapframe. Pity we cannot insert assembly before the function
56 * prologue.
57 */
58
59 #ifndef PLTSYM
60 #define PLTSYM
61 #endif
62
63 #define MCOUNT \
64 __asm__(".text"); \
65 __asm__(".align 2"); \
66 __asm__(".type __mcount ,%function"); \
67 __asm__(".global __mcount"); \
68 __asm__("__mcount:"); \
69 /* \
70 * Preserve registers that are trashed during mcount \
71 */ \
72 __asm__("stmfd sp!, {r0-r3, ip, lr}"); \
73 /* \
74 * find the return address for mcount, \
75 * and the return address for mcount's caller. \
76 * \
77 * frompcindex = pc pushed by call into self. \
78 */ \
79 __asm__("mov r0, ip"); \
80 /* \
81 * selfpc = pc pushed by mcount call \
82 */ \
83 __asm__("mov r1, lr"); \
84 /* \
85 * Call the real mcount code \
86 */ \
87 __asm__("bl mcount"); \
88 /* \
89 * Restore registers that were trashed during mcount \
90 */ \
91 __asm__("ldmfd sp!, {r0-r3, lr}"); \
92 /* \
93 * Return to the caller. Loading lr and pc in one instruction \
94 * is deprecated on ARMv7 so we need this on its own. \
95 */ \
96 __asm__("ldmfd sp!, {pc}");
97 void bintr(void);
98 void btrap(void);
99 void eintr(void);
100 void user(void);
101
102 #define MCOUNT_FROMPC_USER(pc) \
103 ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)
104
105 #define MCOUNT_FROMPC_INTR(pc) \
106 ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \
107 ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \
108 (uintfptr_t)btrap) : ~0U)
109
110
111 #ifdef _KERNEL
112
113 #define MCOUNT_DECL(s) register_t s;
114
115 #include <machine/asm.h>
116 #include <machine/cpufunc.h>
117 /*
118 * splhigh() and splx() are heavyweight, and call mcount(). Therefore
119 * we disabled interrupts (IRQ, but not FIQ) directly on the CPU.
120 *
121 * We're lucky that the CPSR and 's' both happen to be 'int's.
122 */
123 #define MCOUNT_ENTER(s) {s = intr_disable(); } /* kill IRQ */
124 #define MCOUNT_EXIT(s) {intr_restore(s); } /* restore old value */
125
126 void mcount(uintfptr_t frompc, uintfptr_t selfpc);
127
128 #else
129 typedef u_int uintfptr_t;
130 #endif /* _KERNEL */
131
132 #endif /* !_MACHINE_PROFILE_H_ */
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