Add dl_iterate_phdr() support.

ok drahn@, millert@

src/include/link_elf.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: link_elf.h,v 1.4 2002/09/08 17:55:37 drahn Exp $	*/
+/*	$OpenBSD: link_elf.h,v 1.5 2004/10/14 10:02:28 kettenis Exp $	*/
 
 /*
  * Public domain.
@@ -25,4 +25,17 @@ struct link_map {
 	struct link_map	*l_next;
 	struct link_map	*l_prev;
 };
+
+struct dl_phdr_info {
+	Elf_Addr	dlpi_addr;
+	const char	*dlpi_name;
+	const Elf_Phdr	*dlpi_phdr;
+	Elf_Half	dlpi_phnum;
+};
+
+__BEGIN_DECLS
+int	dl_iterate_phdr (int (*)(struct dl_phdr_info *, size_t, void *),
+	   void *);
+__END_DECLS
+
 #endif /* !_LINK_ELF_H */