Function link_elf_lookup_set

freebsd/kern/link_elf.c:1638–1689

* Look up a linker set on an ELF system. */

 * Look up a linker set on an ELF system.
 */
static int
link_elf_lookup_set(linker_file_t lf, const char *name,
    void ***startp, void ***stopp, int *countp)
{
	c_linker_sym_t sym;
	linker_symval_t symval;
	char *setsym;
	void **start, **stop;
	int len, error = 0, count;

	len = strlen(name) + sizeof("__start_set_"); /* sizeof includes \0 */
	setsym = malloc(len, M_LINKER, M_WAITOK);

	/* get address of first entry */
	snprintf(setsym, len, "%s%s", "__start_set_", name);
	error = link_elf_lookup_symbol(lf, setsym, &sym);
	if (error != 0)
		goto out;
	link_elf_symbol_values(lf, sym, &symval);
	if (symval.value == 0) {
		error = ESRCH;
		goto out;
	}
	start = (void **)symval.value;

	/* get address of last entry */
	snprintf(setsym, len, "%s%s", "__stop_set_", name);
	error = link_elf_lookup_symbol(lf, setsym, &sym);
	if (error != 0)
		goto out;
	link_elf_symbol_values(lf, sym, &symval);
	if (symval.value == 0) {
		error = ESRCH;
		goto out;
	}
	stop = (void **)symval.value;

	/* and the number of entries */
	count = stop - start;

	/* and copy out */
	if (startp != NULL)
		*startp = start;
	if (stopp != NULL)
		*stopp = stop;
	if (countp != NULL)
		*countp = count;

out:
	free(setsym, M_LINKER);
	return (error);
}

static int
link_elf_each_function_name(linker_file_t file,