#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/linker.h>
#include <sys/sysctl.h>
#include <sys/errno.h>

#include <err.h>
#include <stdlib.h>
#include <string.h>

#include "gprof.h"

/* Things which get -E excluded by default. */
static char     *excludes[] = { ".mcount", "_mcleanup", NULL };

int
kernel_getnfile(const char *unused __unused, char ***defaultEs)
{
        char *namelist;
        size_t len;
        char *name;

        if (sysctlbyname("kern.function_list", NULL, &len, NULL, 0) == -1)
                err(1, "sysctlbyname: function_list size");
        for (;;) {
                namelist = malloc(len);
                if (namelist == NULL)
                        err(1, "malloc");
                if (sysctlbyname("kern.function_list", namelist, &len, NULL,
                   0) == 0)
                        break;
                if (errno == ENOMEM)
                        free(namelist);
                else
                        err(1, "sysctlbyname: function_list");
        }
        nname = 0;
        for (name = namelist; *name != '\0'; name += strlen(name) + 1)
                nname++;
        /* Allocate memory for them, plus a terminating entry. */
        if ((nl = (nltype *)calloc(nname + 1, sizeof(nltype))) == NULL)
                errx(1, "Insufficient memory for symbol table");
        npe = nl;
        for (name = namelist; *name != '\0'; name += strlen(name) + 1) {
                struct kld_sym_lookup ksl;

                ksl.version = sizeof(ksl);
                ksl.symname = name;
                if (kldsym(0, KLDSYM_LOOKUP, &ksl))
                        err(1, "kldsym(%s)", name);
                /* aflag not supported */
                if (uflag && strchr(name, '.') != NULL)
                        continue;
                npe->value = ksl.symvalue;
                npe->name = name;
                npe++;
        }
        npe->value = -1;

        *defaultEs = excludes;
        return (0);
}