1/* $NetBSD: profile.h,v 1.38 2021/11/02 11:26:04 ryo Exp $ */
2
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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)profile.h 8.1 (Berkeley) 6/11/93
32 */
33
34#ifdef _KERNEL
35#include <machine/cpufunc.h>
36#endif
37
38#define _MCOUNT_DECL static __inline void _mcount
39
40#ifdef __ELF__
41#define MCOUNT_ENTRY "__mcount"
42#define MCOUNT_COMPAT __weak_alias(mcount, __mcount)
43#else
44#define MCOUNT_ENTRY "mcount"
45#define MCOUNT_COMPAT /* nothing */
46#endif
47
48#if defined(_REENTRANT) && !defined(_KERNEL)
49#define MCOUNT_ACTIVE if (_gmonparam.state != GMON_PROF_ON) return
50#else
51#define MCOUNT_ACTIVE
52#endif
53
54#define MCOUNT \
55MCOUNT_COMPAT \
56extern void mcount(void) __asm(MCOUNT_ENTRY) \
57 __attribute__((__no_instrument_function__)); \
58void \
59mcount(void) \
60{ \
61 int selfpc, frompcindex; \
62 int eax, ecx, edx; \
63 \
64 MCOUNT_ACTIVE; \
65 __asm volatile("movl %%eax,%0" : "=g" (eax)); \
66 __asm volatile("movl %%ecx,%0" : "=g" (ecx)); \
67 __asm volatile("movl %%edx,%0" : "=g" (edx)); \
68 /* \
69 * find the return address for mcount, \
70 * and the return address for mcount's caller. \
71 * \
72 * selfpc = pc pushed by mcount call \
73 */ \
74 selfpc = (int)__builtin_return_address(0); \
75 /* \
76 * frompcindex = stack frame of caller, assuming frame pointer \
77 */ \
78 frompcindex = ((int *)__builtin_frame_address(1))[1]; \
79 _mcount((u_long)frompcindex, (u_long)selfpc); \
80 \
81 __asm volatile("movl %0,%%edx" : : "g" (edx)); \
82 __asm volatile("movl %0,%%ecx" : : "g" (ecx)); \
83 __asm volatile("movl %0,%%eax" : : "g" (eax)); \
84}
85
86#ifdef _KERNEL
87static inline __always_inline void
88mcount_disable_intr(void)
89{
90 __asm volatile("cli");
91}
92
93static inline __always_inline u_long
94mcount_read_psl(void)
95{
96 u_long ef;
97
98 __asm volatile("pushfl; popl %0" : "=r" (ef));
99 return (ef);
100}
101
102static inline __always_inline void
103mcount_write_psl(u_long ef)
104{
105 __asm volatile("pushl %0; popfl" : : "r" (ef));
106}
107
108#define MCOUNT_ENTER \
109 do { s = (int)mcount_read_psl(); mcount_disable_intr(); } while (0)
110#define MCOUNT_EXIT do { mcount_write_psl(s); } while (0)
111
112#endif /* _KERNEL */