bfd/

[binutils-gdb.git] / bfd / dwarf2.c

diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
index 059e90334d81708f347497f52bebf760881ece9e..119689b33cbf2820a780be12983f7554425a73e0 100644 (file)
--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -2469,13 +2469,19 @@ _bfd_dwarf2_find_nearest_line (bfd *abfd,
          length = read_4_bytes (abfd, stash->info_ptr + 4);
          stash->info_ptr += 8;
        }
-      /* In the absence of the hints above, we assume addr_size-sized
-        offsets, for backward-compatibility with pre-DWARF3 64-bit
-        platforms.  */
+      /* In the absence of the hints above, we assume 32-bit DWARF2
+        offsets even for targets with 64-bit addresses, because:
+          a) most of the time these targets will not have generated
+             more than 2Gb of debug info and so will not need 64-bit
+             offsets,
+        and
+          b) if they do use 64-bit offsets but they are not using
+             the size hints that are tested for above then they are
+             not conforming to the DWARF3 standard anyway.  */
       else if (addr_size == 8)
        {
-         length = read_8_bytes (abfd, stash->info_ptr);
-         stash->info_ptr += 8;
+         offset_size = 4;
+          stash->info_ptr += 4;
        }
       else
        stash->info_ptr += 4;
@@ -2692,13 +2698,19 @@ _bfd_dwarf2_find_line (bfd *abfd,
          length = read_4_bytes (abfd, stash->info_ptr + 4);
          stash->info_ptr += 8;
        }
-      /* In the absence of the hints above, we assume addr_size-sized
-        offsets, for backward-compatibility with pre-DWARF3 64-bit
-        platforms.  */
+      /* In the absence of the hints above, we assume 32-bit DWARF2
+        offsets even for targets with 64-bit addresses, because:
+          a) most of the time these targets will not have generated
+             more than 2Gb of debug info and so will not need 64-bit
+             offsets,
+        and
+          b) if they do use 64-bit offsets but they are not using
+             the size hints that are tested for above then they are
+             not conforming to the DWARF3 standard anyway.  */
       else if (addr_size == 8)
        {
-         length = read_8_bytes (abfd, stash->info_ptr);
-         stash->info_ptr += 8;
+         offset_size = 4;
+          stash->info_ptr += 4;
        }
       else
        stash->info_ptr += 4;