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[objdump] Add printdata()

This function prints a binary dump of the data.

--- a/objdump/main.c

+++ b/objdump/main.c

@@ -149,6 +149,31 @@

 	return 0;

 }

+static int

+printdata(struct myrohdr *hdr, FILE *fp)

+{

+	unsigned long off;

+	int c, i, j;

+

+	puts("data:");

+	for (off = 0; ; off += 32) {

+		printf("\t%08x:", off);

+		for (i = 0; i < 2; i++) {

+			for (j = 0; j < 16; j++) {

+				if ((c = getc(fp)) == EOF)

+					goto exit_loop;

+				printf(" %02X", c);

+			}

+			putchar('\t');

+		}

+		putchar('\n');

+	}

+

+exit_loop:

+	putchar('\n');

+	return (ferror(fp)) ? -1 : 0;

+}

+

 int

 main(int argc, char *argv[])

 {

@@ -187,6 +212,8 @@

 		if (printsymbols(&hdr, fp) < 0)

 			goto wrong_file;

 		if (printrelocs(&hdr, fp) < 0)

+			goto wrong_file;

+		if (printdata(&hdr, fp) < 0)

 			goto wrong_file;

 		goto close_file;