Merge pull request #31 from rauls5382/master

Handle ET_DYN binaries with nonzero offset

internal/elfexec/elfexec.go

 		return start, nil
 	case elf.ET_DYN:
 		if offset != 0 {
-			return 0, fmt.Errorf("Don't know how to handle mapping.Offset")
+			if loadSegment == nil || loadSegment.Vaddr == 0 {
+				return start - offset, nil
+			}
+			return 0, fmt.Errorf("Don't know how to handle mapping. Offset=%x, vaddr=%x",
+				offset, loadSegment.Vaddr)
 		}
 		if loadSegment == nil {
 			return start, nil