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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Search routines for processing new-style mon.out files.
*/
#include "profv.h"
/*
* Look up an address in a sorted-by-address namelist; this deals with
* misses by mapping them to the next lower entry point.
*/
nltype *
nllookup(mod_info_t *module, Address address, Address *nxtsym_val)
{
size_t low = 0, middle, high = module->nfuncs - 1;
nltype *nl = module->nl;
Address keyval;
/*
* If this is the program executable in which we are looking up
* a symbol, then the actual load address will be the same as the
* address specified in the ELF file. For shared objects, the
* load address may differ from what is specified in the file. In
* this case, we may need to look for a different value altogether.
*/
keyval = module->txt_origin + (address - module->load_base);
if (keyval < nl[low].value) {
if (nxtsym_val) {
*nxtsym_val = module->load_base +
(nl[low].value - module->txt_origin);
}
return (NULL);
}
if (keyval >= nl[high].value) {
if (nxtsym_val)
*nxtsym_val = module->load_end;
return (&nl[high]);
}
while (low != high) {
middle = (high + low) >> 1;
if ((nl[middle].value <= keyval) &&
(nl[middle + 1].value > keyval)) {
if (nxtsym_val) {
*nxtsym_val = module->load_base +
(nl[middle + 1].value - module->txt_origin);
}
return (&nl[middle]);
}
if (nl[middle].value > keyval)
high = middle;
else
low = middle + 1;
}
/* must never reach here! */
return (NULL);
}
/*
* Look up a module's base address in a sorted list of pc-hits. Unlike
* nllookup(), this deals with misses by mapping them to the next *higher*
* pc-hit. This is so that we get into the module's first pc-hit rightaway,
* even if the module's entry-point (load_base) itself is not a hit.
*/
Address *
locate(Address *pclist, size_t nelem, Address keypc)
{
size_t low = 0, middle, high = nelem - 1;
if (keypc <= pclist[low])
return (pclist);
if (keypc > pclist[high])
return (NULL);
while (low != high) {
middle = (high + low) >> 1;
if ((pclist[middle] < keypc) && (pclist[middle + 1] >= keypc))
return (&pclist[middle + 1]);
if (pclist[middle] >= keypc)
high = middle;
else
low = middle + 1;
}
/* must never reach here! */
return (NULL);
}
|
