64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/linker.h>
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#include <sys/sysctl.h>
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#include <sys/errno.h>
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include "gprof.h"
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/* Things which get -E excluded by default. */
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static char *excludes[] = { ".mcount", "_mcleanup", NULL };
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int
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kernel_getnfile(const char *unused, char ***defaultEs)
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{
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char *namelist;
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size_t len;
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char *name;
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if (sysctlbyname("kern.function_list", NULL, &len, NULL, 0) == -1)
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err(1, "sysctlbyname: function_list size");
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for (;;) {
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namelist = malloc(len);
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if (namelist == NULL)
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err(1, "malloc");
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if (sysctlbyname("kern.function_list", namelist, &len, NULL,
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0) == 0)
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break;
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if (errno == ENOMEM)
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free(namelist);
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else
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err(1, "sysctlbyname: function_list");
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}
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nname = 0;
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for (name = namelist; *name != '\0'; name += strlen(name) + 1)
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nname++;
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/* Allocate memory for them, plus a terminating entry. */
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if ((nl = (nltype *)calloc(nname + 1, sizeof(nltype))) == NULL)
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errx(1, "Insufficient memory for symbol table");
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npe = nl;
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for (name = namelist; *name != '\0'; name += strlen(name) + 1) {
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struct kld_sym_lookup ksl;
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ksl.version = sizeof(ksl);
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ksl.symname = name;
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if (kldsym(0, KLDSYM_LOOKUP, &ksl))
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err(1, "kldsym(%s)", name);
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/* aflag not supported */
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if (uflag && strchr(name, '.') != NULL)
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continue;
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npe->value = ksl.symvalue;
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npe->name = name;
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npe++;
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}
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npe->value = -1;
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*defaultEs = excludes;
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}
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