2 * Copyright (c) 2010 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/types.h>
36 #include <sys/sysctl.h>
55 TAILQ_ENTRY(symdata
) link
;
61 static TAILQ_HEAD(symlist
, symdata
) symlist
;
62 static struct symdata
*symcache
;
63 static char *symbegin
= (void *)(intptr_t)0;
64 static char *symend
= (void *)(intptr_t)-1;
67 read_symbols(const char *file
)
71 size_t buflen
= sizeof(buf
);
81 if (sysctlbyname("kern.bootfile", buf
, &buflen
, NULL
, 0) < 0)
82 file
= "/boot/kernel";
86 snprintf(cmd
, sizeof(cmd
), "nm -n %s", file
);
87 if ((fp
= popen(cmd
, "r")) != NULL
) {
88 while (fgets(buf
, sizeof(buf
), fp
) != NULL
) {
89 s1
= strtok(buf
, " \t\n");
90 s2
= strtok(NULL
, " \t\n");
91 s3
= strtok(NULL
, " \t\n");
93 sym
= malloc(sizeof(struct symdata
));
94 sym
->symaddr
= (char *)strtoul(s1
, NULL
, 16);
96 sym
->symname
= strdup(s3
);
97 if (strcmp(s3
, "kernbase") == 0)
98 symbegin
= sym
->symaddr
;
99 if (strcmp(s3
, "end") == 0)
100 symend
= sym
->symaddr
;
101 TAILQ_INSERT_TAIL(&symlist
, sym
, link
);
106 symcache
= TAILQ_FIRST(&symlist
);
110 address_to_symbol(void *kptr
, struct save_ctx
*ctx
)
112 char *buf
= ctx
->save_buf
;
113 int size
= sizeof(ctx
->save_buf
);
115 if (symcache
== NULL
||
116 (char *)kptr
< symbegin
|| (char *)kptr
>= symend
118 snprintf(buf
, size
, "%p", kptr
);
121 while ((char *)symcache
->symaddr
< (char *)kptr
) {
122 if (TAILQ_NEXT(symcache
, link
) == NULL
)
124 symcache
= TAILQ_NEXT(symcache
, link
);
126 while ((char *)symcache
->symaddr
> (char *)kptr
) {
127 if (symcache
!= TAILQ_FIRST(&symlist
))
128 symcache
= TAILQ_PREV(symcache
, symlist
, link
);
130 snprintf(buf
, size
, "%s+%d", symcache
->symname
,
131 (int)((char *)kptr
- symcache
->symaddr
));