Backport dl_iterate_phdr from FreeBSD-7 so that we can use gcc-4
and not pull in libgcc_s.so.1 into every binary we build.

--- sys/link_elf.h	2005/01/07 02:29:23	1.26
+++ sys/link_elf.h	2007/04/03 18:33:41	1.27
@@ -41,7 +41,7 @@
 #ifndef _SYS_LINK_ELF_H_
 #define _SYS_LINK_ELF_H_
 
-#include <sys/types.h>
+#include <sys/elf.h>
 
 /*
  * Flags that describe the origin of the entries in Dl_serinfo.
@@ -75,5 +75,28 @@ struct r_debug {
 	    RT_DELETE				/* removing a shared library */
 	}		r_state;
 };
+
+/* Add a define so that libexec and lib can optionally use this */
+#define _GENTOO_DL_ITERATE_PHDR
+
+struct dl_phdr_info
+{
+	Elf_Addr dlpi_addr;			/* module relocation base */
+	const char *dlpi_name;			/* module name */
+	const Elf_Phdr *dlpi_phdr;		/* pointer to module's phdr */
+	Elf_Half dlpi_phnum;			/* number of entries in phdr */
+	unsigned long long int dlpi_adds;	/* total # of loads */
+	unsigned long long int dlpi_subs;	/* total # of unloads */
+	size_t dlpi_tls_modid;
+	void *dlpi_tls_data;
+};
+
+__BEGIN_DECLS
+
+typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t,
+    void *);
+extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
+
+__END_DECLS
 
 #endif /* _SYS_LINK_ELF_H_ */
--- sys/elf.h	2007-09-10 14:22:42 +0100
+++ sys/elf.h	2007-09-10 14:25:12 +0100
@@ -0,0 +1,9 @@
+#ifndef	_SYS_ELF_H_
+#define	_SYS_ELF_H_
+
+#include <sys/types.h>
+#include <machine/elf.h>
+#include <sys/elf32.h>
+#include <sys/elf64.h>
+
+#endif /* !_SYS_ELF_H_ */