From f28fdede6f2d2cb5aafec030913ea5ac7ad6eaed Mon Sep 17 00:00:00 2001
From: dfr <dfr@FreeBSD.org>
Date: Fri, 1 May 1998 08:40:11 +0000
Subject: Add ELF support.

---
 usr.bin/ldd/ldd.c  | 61 ++++++++++++++++++++++++++++++++++++++++++++++--------
 usr.bin/ldd/sods.c | 12 +++++++++--
 2 files changed, 62 insertions(+), 11 deletions(-)

(limited to 'usr.bin')

diff --git a/usr.bin/ldd/ldd.c b/usr.bin/ldd/ldd.c
index d940261..31a7a67 100644
--- a/usr.bin/ldd/ldd.c
+++ b/usr.bin/ldd/ldd.c
@@ -27,7 +27,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: ldd.c,v 1.13 1997/02/22 15:46:43 peter Exp $
+ *	$Id: ldd.c,v 1.14 1997/09/02 21:54:39 jdp Exp $
  */
 
 #include <sys/types.h>
@@ -37,6 +37,7 @@
 #include <sys/resource.h>
 #include <sys/wait.h>
 #include <a.out.h>
+#include <elf.h>
 #include <err.h>
 #include <fcntl.h>
 #include <stdio.h>
@@ -118,19 +119,61 @@ char	*argv[];
 			argv++;
 			continue;
 		}
-		if (read(fd, &hdr, sizeof hdr) != sizeof hdr
-		    || (N_GETFLAG(hdr) & EX_DPMASK) != EX_DYNAMIC
-#if 1 /* Compatibility */
-		    || hdr.a_entry < __LDPGSZ
-#endif
-		    ) {
-
-			warnx("%s: not a dynamic executable", *argv);
+		if (read(fd, &hdr, sizeof hdr) != sizeof hdr) {
+			warnx("%s: can't read program header", *argv);
 			(void)close(fd);
 			rval |= 1;
 			argv++;
 			continue;
 		}
+
+		if (!N_BADMAG(hdr)) {
+			/* a.out file */
+			if ((N_GETFLAG(hdr) & EX_DPMASK) != EX_DYNAMIC
+#if 1 /* Compatibility */
+			    || hdr.a_entry < __LDPGSZ
+#endif
+				) {
+				warnx("%s: not a dynamic executable", *argv);
+				(void)close(fd);
+				rval |= 1;
+				argv++;
+				continue;
+			}
+		} else if (IS_ELF(*(Elf32_Ehdr*)&hdr)) {
+			Elf32_Ehdr ehdr;
+			Elf32_Phdr phdr;
+			int dynamic = 0, i;
+
+			lseek(fd, 0, SEEK_SET);
+			if (read(fd, &ehdr, sizeof ehdr) != sizeof ehdr) {
+				warnx("%s: can't read program header", *argv);
+				(void)close(fd);
+				rval |= 1;
+				argv++;
+				continue;
+			}
+			lseek(fd, 0, ehdr.e_phoff);
+			for (i = 0; i < ehdr.e_phnum; i++) {
+				if (read(fd, &phdr, ehdr.e_phentsize)
+				   != sizeof phdr) {
+					warnx("%s: can't read program header", *argv);
+					(void)close(fd);
+					rval |= 1;
+					argv++;
+					continue;
+				}
+				if (phdr.p_type == PT_DYNAMIC)
+					dynamic = 1;
+			}
+			if (!dynamic) {
+				warnx("%s: not a dynamic executable", *argv);
+				(void)close(fd);
+				rval |= 1;
+				argv++;
+				continue;
+			}
+		}
 		(void)close(fd);
 
 		setenv("LD_TRACE_LOADED_OBJECTS_PROGNAME", *argv, 1);
diff --git a/usr.bin/ldd/sods.c b/usr.bin/ldd/sods.c
index 3e28746..801cca0 100644
--- a/usr.bin/ldd/sods.c
+++ b/usr.bin/ldd/sods.c
@@ -22,7 +22,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: sods.c,v 1.5 1997/09/02 21:54:39 jdp Exp $
+ * $Id: sods.c,v 1.6 1997/11/28 19:34:27 jdp Exp $
  */
 
 #include <assert.h>
@@ -39,6 +39,7 @@
 #include <sys/stat.h>
 
 #include <a.out.h>
+#include <elf.h>
 #include <link.h>
 #include <stab.h>
 
@@ -173,6 +174,13 @@ dump_file(const char *fname)
 
     file_base = (const char *) objbase;	/* Makes address arithmetic easier */
 
+    if (IS_ELF(*(Elf32_Ehdr*) file_base)) {
+	error("%s: this is an ELF program; use objdump to examine.", fname);
+	munmap(objbase, sb.st_size);
+	close(fd);
+	return;
+    }
+
     ex = (const struct exec *) file_base;
 
     printf("%s: a_midmag = 0x%lx\n", fname, ex->a_midmag);
@@ -211,7 +219,7 @@ dump_file(const char *fname)
     }
 
     printf("  Entry = 0x%lx\n", ex->a_entry);
-    printf("  Text offset = %x, address = %x\n", N_TXTOFF(*ex),
+    printf("  Text offset = %x, address = %lx\n", N_TXTOFF(*ex),
 	N_TXTADDR(*ex));
     printf("  Data offset = %lx, address = %lx\n", N_DATOFF(*ex),
 	N_DATADDR(*ex));
-- 
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