* dwarf2loc.c (find_location_expression): Add relocation offset

	to base-address-selection entry base addresses.  Read addresses
	(and offsets) as signed/unsigned integers, depending on the
	BFD's sign_extend_vma flag.  Do not call dwarf2_read_address.
	(loclist_describe_location): Likewise.
	(disassemble_dwarf_expression): Read DW_OP_addr operand as
	unsigned integer.  Do not call dwarf2_read_address.
	(locexpr_describe_location): Likewise for DW_OP_GNU_push_tls_address.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 762f0b6..3077b17 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,14 @@
+2010-06-21  Ulrich Weigand  <uweigand@de.ibm.com>
+
+       * dwarf2loc.c (find_location_expression): Add relocation offset
+       to base-address-selection entry base addresses.  Read addresses
+       (and offsets) as signed/unsigned integers, depending on the
+       BFD's sign_extend_vma flag.  Do not call dwarf2_read_address.
+       (loclist_describe_location): Likewise.
+       (disassemble_dwarf_expression): Read DW_OP_addr operand as
+       unsigned integer.  Do not call dwarf2_read_address.
+       (locexpr_describe_location): Likewise for DW_OP_GNU_push_tls_address.
+
 2010-06-19  Ulrich Weigand  <uweigand@de.ibm.com>
 
        * spu-tdep.c (spu_frame_unwind_cache): Use LSLR register

diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c
index 32d69df..46007c2 100644 (file)
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -67,6 +67,7 @@ find_location_expression (struct dwarf2_loclist_baton *baton,
   struct gdbarch *gdbarch = get_objfile_arch (objfile);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   unsigned int addr_size = dwarf2_per_cu_addr_size (baton->per_cu);
+  int signed_addr_p = bfd_get_sign_extend_vma (objfile->obfd);
   CORE_ADDR base_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
   /* Adjust base_address for relocatable objects.  */
   CORE_ADDR base_offset = ANOFFSET (objfile->section_offsets,
@@ -81,21 +82,25 @@ find_location_expression (struct dwarf2_loclist_baton *baton,
       if (buf_end - loc_ptr < 2 * addr_size)
        error (_("find_location_expression: Corrupted DWARF expression."));
 
-      low = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
+      if (signed_addr_p)
+       low = extract_signed_integer (loc_ptr, addr_size, byte_order);
+      else
+       low = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
+      loc_ptr += addr_size;
+
+      if (signed_addr_p)
+       high = extract_signed_integer (loc_ptr, addr_size, byte_order);
+      else
+       high = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
       loc_ptr += addr_size;
 
       /* A base-address-selection entry.  */
-      if (low == base_mask)
+      if ((low & base_mask) == base_mask)
        {
-         base_address = dwarf2_read_address (gdbarch,
-                                             loc_ptr, buf_end, addr_size);
-         loc_ptr += addr_size;
+         base_address = high + base_offset;
          continue;
        }
 
-      high = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
-      loc_ptr += addr_size;
-
       /* An end-of-list entry.  */
       if (low == 0 && high == 0)
        return NULL;
@@ -2016,15 +2021,14 @@ locexpr_describe_location_piece (struct symbol *symbol, struct ui_file *stream,
           && data[1 + addr_size] == DW_OP_GNU_push_tls_address
           && piece_end_p (data + 2 + addr_size, end))
     {
-      CORE_ADDR offset = dwarf2_read_address (gdbarch,
-                                             data + 1,
-                                             end,
-                                             addr_size);
+      ULONGEST offset;
+      offset = extract_unsigned_integer (data + 1, addr_size,
+                                        gdbarch_byte_order (gdbarch));
 
       fprintf_filtered (stream, 
-                       _("a thread-local variable at offset %s "
+                       _("a thread-local variable at offset 0x%s "
                          "in the thread-local storage for `%s'"),
-                       paddress (gdbarch, offset), objfile->name);
+                       phex_nz (offset, addr_size), objfile->name);
 
       data += 1 + addr_size + 1;
     }
@@ -2061,7 +2065,6 @@ disassemble_dwarf_expression (struct ui_file *stream,
             || (data[0] != DW_OP_piece && data[0] != DW_OP_bit_piece)))
     {
       enum dwarf_location_atom op = *data++;
-      CORE_ADDR addr;
       ULONGEST ul;
       LONGEST l;
       const char *name;
@@ -2076,9 +2079,10 @@ disassemble_dwarf_expression (struct ui_file *stream,
       switch (op)
        {
        case DW_OP_addr:
-         addr = dwarf2_read_address (arch, data, end, addr_size);
+         ul = extract_unsigned_integer (data, addr_size,
+                                        gdbarch_byte_order (arch));
          data += addr_size;
-         fprintf_filtered (stream, " %s", paddress (arch, addr));
+         fprintf_filtered (stream, " 0x%s", phex_nz (ul, addr_size));
          break;
 
        case DW_OP_const1u:
@@ -2488,6 +2492,7 @@ loclist_describe_location (struct symbol *symbol, CORE_ADDR addr,
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   unsigned int addr_size = dwarf2_per_cu_addr_size (dlbaton->per_cu);
   int offset_size = dwarf2_per_cu_offset_size (dlbaton->per_cu);
+  int signed_addr_p = bfd_get_sign_extend_vma (objfile->obfd);
   CORE_ADDR base_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
   /* Adjust base_address for relocatable objects.  */
   CORE_ADDR base_offset = ANOFFSET (objfile->section_offsets,
@@ -2506,23 +2511,27 @@ loclist_describe_location (struct symbol *symbol, CORE_ADDR addr,
        error (_("Corrupted DWARF expression for symbol \"%s\"."),
               SYMBOL_PRINT_NAME (symbol));
 
-      low = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
+      if (signed_addr_p)
+       low = extract_signed_integer (loc_ptr, addr_size, byte_order);
+      else
+       low = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
+      loc_ptr += addr_size;
+
+      if (signed_addr_p)
+       high = extract_signed_integer (loc_ptr, addr_size, byte_order);
+      else
+       high = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
       loc_ptr += addr_size;
 
       /* A base-address-selection entry.  */
-      if (low == base_mask)
+      if ((low & base_mask) == base_mask)
        {
-         base_address = dwarf2_read_address (gdbarch,
-                                             loc_ptr, buf_end, addr_size);
+         base_address = high + base_offset;
          fprintf_filtered (stream, _("  Base address %s"),
                            paddress (gdbarch, base_address));
-         loc_ptr += addr_size;
          continue;
        }
 
-      high = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
-      loc_ptr += addr_size;
-
       /* An end-of-list entry.  */
       if (low == 0 && high == 0)
        break;