1 #include <sys/cdefs.h>
2 __FBSDID("$FreeBSD$");
3
4 #include <sys/param.h>
5 #include <sys/linker.h>
6 #include <sys/sysctl.h>
7 #include <sys/errno.h>
8
9 #include <err.h>
10 #include <stdlib.h>
11 #include <string.h>
12
13 #include "gprof.h"
14
15 /* Things which get -E excluded by default. */
16 static char *excludes[] = { ".mcount", "_mcleanup", NULL };
17
18 int
kernel_getnfile(const char * unused __unused,char *** defaultEs)19 kernel_getnfile(const char *unused __unused, char ***defaultEs)
20 {
21 char *namelist;
22 size_t len;
23 char *name;
24
25 if (sysctlbyname("kern.function_list", NULL, &len, NULL, 0) == -1)
26 err(1, "sysctlbyname: function_list size");
27 for (;;) {
28 namelist = malloc(len);
29 if (namelist == NULL)
30 err(1, "malloc");
31 if (sysctlbyname("kern.function_list", namelist, &len, NULL,
32 0) == 0)
33 break;
34 if (errno == ENOMEM)
35 free(namelist);
36 else
37 err(1, "sysctlbyname: function_list");
38 }
39 nname = 0;
40 for (name = namelist; *name != '\0'; name += strlen(name) + 1)
41 nname++;
42 /* Allocate memory for them, plus a terminating entry. */
43 if ((nl = (nltype *)calloc(nname + 1, sizeof(nltype))) == NULL)
44 errx(1, "Insufficient memory for symbol table");
45 npe = nl;
46 for (name = namelist; *name != '\0'; name += strlen(name) + 1) {
47 struct kld_sym_lookup ksl;
48
49 ksl.version = sizeof(ksl);
50 ksl.symname = name;
51 if (kldsym(0, KLDSYM_LOOKUP, &ksl))
52 err(1, "kldsym(%s)", name);
53 /* aflag not supported */
54 if (uflag && strchr(name, '.') != NULL)
55 continue;
56 npe->value = ksl.symvalue;
57 npe->name = name;
58 npe++;
59 }
60 npe->value = -1;
61
62 *defaultEs = excludes;
63 return (0);
64 }
65