1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/* $OpenBSD: crt0.c,v 1.6 2010/09/12 12:13:51 kettenis Exp $ */
/* $NetBSD: crt0.c,v 1.7 1995/06/03 13:16:15 pk Exp $ */
/*
* Copyright (c) 1993 Paul Kranenburg
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
extern void __init __P((void));
extern void _mcleanup __P((void));
extern unsigned char eprol asm ("eprol");
extern unsigned char etext;
char **environ;
static char empty[1];
char *__progname = empty;
void __perf_init __P((void));
static inline int
_perfcall(int func, void *arg)
{
int status = 0;
#if 0
__asm__ volatile ( "move $4, %1\n\t"
"move $5, %2\n\t"
"teqi $0, 0\n\t"
"move %0, $2"
: "=r" (status)
: "r" (func), "r" (arg)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10",
"$11", "$12","$13","$14","$15","$24","$25", "memory");
#endif
return(status);
}
void
__start()
{
struct kframe {
long kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
register struct kframe *kfp;
register char **argv, *ap;
/*
* Do GP register setup. Differs depending on shared lib stuff or not.
*/
#if defined(_NO_ABICALLS)
asm(" dla $28,_gp");
asm(" daddiu %0,$29,32" : "=r" (kfp));
#else
#if defined(__GNUC__) && __GNUC__ > 3
asm(" daddiu %0,$29,64" : "=r" (kfp));
#else
asm(" daddiu %0,$29,80" : "=r" (kfp));
#endif
#endif
/* just above the saved frame pointer
kfp = (struct kframe *) (¶m-1);*/
argv = &kfp->kargv[0];
environ = argv + kfp->kargc + 1;
if (ap = argv[0])
if ((__progname = strrchr(ap, '/')) == NULL)
__progname = ap;
else
++__progname;
asm("eprol:");
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&eprol, (u_long)&etext);
#endif /*MCRT0*/
__init();
__perf_init();
asm ("_callmain:"); /* Defined for the benefit of debuggers */
exit(main(kfp->kargc, argv, environ));
}
#ifdef MCRT0
asm (" .text");
asm ("_eprol:");
#endif
/************/
#include <stdio.h>
void _perf_cleanup __P((void));
#define PCNT_CE 0x0400 /* Count enable */
#define PCNT_UM 0x0200 /* Count in User mode */
#define PCNT_KM 0x0100 /* Count in kernel mode */
#define PCNT_FNC_SELECT 0x0001 /* Select counter source */
#define PCNT_FNC_READ 0x0002 /* Read current value of counter */
struct cname {
char *name;
int cval;
} cn_tab[] = {
{ "CLOCKS", 0x00 },
{ "INSTR", 0x01 },
{ "FPINSTR", 0x02 },
{ "IINSTR", 0x03 },
{ "LOAD", 0x04 },
{ "STORE", 0x05 },
{ "DUAL", 0x06 },
{ "BRPREF", 0x07 },
{ "EXTMISS", 0x08 },
{ "STALL", 0x09 },
{ "SECMISS", 0x0a },
{ "INSMISS", 0x0b },
{ "DTAMISS", 0x0c },
{ "DTLBMISS", 0x0d },
{ "ITLBMISS", 0x0e },
{ "JTLBIMISS", 0x0f },
{ "JTLBDMISS", 0x10 },
{ "BRTAKEN", 0x11 },
{ "BRISSUED", 0x12 },
{ "SECWBACK", 0x13 },
{ "PRIWBACK", 0x14 },
{ "DCSTALL", 0x15 },
{ "MISS", 0x16 },
{ "FPEXC", 0x17 },
{ "MULSLIP", 0x18 },
{ "CP0SLIP", 0x19 },
{ "LDSLIP", 0x1a },
{ "WBFULL", 0x1b },
{ "CISTALL", 0x1c },
{ "MULSTALL", 0x1d },
{ "ELDSTALL", 0x1e },
};
#define NCNTAB (sizeof(cn_tab) / sizeof(struct cname))
void
__perf_init()
{
long pselect;
char *cn;
if((cn = getenv("__PERF_SELECT")) == NULL) {
return;
}
for(pselect = 0; pselect < NCNTAB; pselect++) {
if(strcmp(cn, cn_tab[pselect].name) == 0) {
pselect = cn_tab[pselect].cval;
break;
}
}
if(pselect >= NCNTAB) {
fprintf(stderr, "!! Invalid __PERF_SELECT !!\n");
exit(255);
}
_perfcall(PCNT_FNC_SELECT, (void *)(PCNT_CE|PCNT_UM|pselect)); /*XXX*/
atexit(_perf_cleanup);
if((cn = getenv("__PERF_START")) == NULL) {
return;
}
}
void
_perf_cleanup()
{
quad_t countvalue;
_perfcall(PCNT_FNC_READ, &countvalue);
printf("\ncount = %qd.\n", countvalue);
}
|
