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