* dwarf2read.c (dwarf2_cu): Add ranges_base.

	Delete have_addr_base, unused.  All uses updated.
	(init_cutu_and_read_dies): Process DW_AT_GNU_ranges_base.
	(dwarf2_get_pc_bounds): Add ranges_base.
	(dwarf2_record_block_ranges): Ditto.

	testsuite/
	* gdb.dwarf2/fission-base.c: New file.
	* gdb.dwarf2/fission-base.S: New file.
	* gdb.dwarf2/fission-base.exp: New file.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0e1cd3c..abb6b56 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2012-06-27  Doug Evans  <dje@google.com>
+
+       * dwarf2read.c (dwarf2_cu): Add ranges_base.
+       Delete have_addr_base, unused.  All uses updated.
+       (init_cutu_and_read_dies): Process DW_AT_GNU_ranges_base.
+       (dwarf2_get_pc_bounds): Add ranges_base.
+       (dwarf2_record_block_ranges): Ditto.
+
 2012-06-27  Tom Tromey  <tromey@redhat.com>
 
        PR macros/7961:

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 4b43adf..4744107 100644 (file)
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -459,6 +459,13 @@ struct dwarf2_cu
      Note this value comes from the stub CU/TU's DIE.  */
   ULONGEST addr_base;
 
+  /* The DW_AT_ranges_base attribute if present, zero otherwise
+     (zero is a valid value though).
+     Note this value comes from the stub CU/TU's DIE.
+     Also note that the value is zero in the non-DWO case so this value can
+     be used without needing to know whether DWO files are in use or not.  */
+  ULONGEST ranges_base;
+
   /* Mark used when releasing cached dies.  */
   unsigned int mark : 1;
 
@@ -475,10 +482,6 @@ struct dwarf2_cu
   unsigned int checked_producer : 1;
   unsigned int producer_is_gxx_lt_4_6 : 1;
   unsigned int producer_is_icc : 1;
-
-  /* Non-zero if DW_AT_addr_base was found.
-     Used when processing DWO files.  */
-  unsigned int have_addr_base : 1;
 };
 
 /* Persistent data held for a compilation unit, even when not
@@ -3996,13 +3999,16 @@ init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
       /* There should be a DW_AT_addr_base attribute here (if needed).
         We need the value before we can process DW_FORM_GNU_addr_index.  */
       cu->addr_base = 0;
-      cu->have_addr_base = 0;
       attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_addr_base, cu);
       if (attr)
-       {
-         cu->addr_base = DW_UNSND (attr);
-         cu->have_addr_base = 1;
-       }
+       cu->addr_base = DW_UNSND (attr);
+
+      /* There should be a DW_AT_ranges_base attribute here (if needed).
+        We need the value before we can process DW_AT_ranges.  */
+      cu->ranges_base = 0;
+      attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_ranges_base, cu);
+      if (attr)
+       cu->ranges_base = DW_UNSND (attr);
 
       if (this_cu->is_debug_types)
        {
@@ -8249,9 +8255,11 @@ dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
       attr = dwarf2_attr (die, DW_AT_ranges, cu);
       if (attr != NULL)
        {
+         unsigned int ranges_offset = DW_UNSND (attr) + cu->ranges_base;
+
          /* Value of the DW_AT_ranges attribute is the offset in the
             .debug_ranges section.  */
-         if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
+         if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst))
            return 0;
          /* Found discontinuous range of addresses.  */
          ret = -1;
@@ -8411,7 +8419,7 @@ dwarf2_record_block_ranges (struct die_info *die, struct block *block,
 
       /* The value of the DW_AT_ranges attribute is the offset of the
          address range list in the .debug_ranges section.  */
-      unsigned long offset = DW_UNSND (attr);
+      unsigned long offset = DW_UNSND (attr) + cu->ranges_base;
       gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
 
       /* For some target architectures, but not others, the

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 77c907b..339cb0a 100644 (file)
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2012-06-27  Doug Evans  <dje@google.com>
+
+       * gdb.dwarf2/fission-base.c: New file.
+       * gdb.dwarf2/fission-base.S: New file.
+       * gdb.dwarf2/fission-base.exp: New file.
+
 2012-06-27  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
        * gdb.dwarf2/callframecfa.exp: Replace $testname by $testfile.

diff --git a/gdb/testsuite/gdb.dwarf2/fission-base.S b/gdb/testsuite/gdb.dwarf2/fission-base.S
new file mode 100644 (file)
index 0000000..94ba068
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/fission-base.S
@@ -0,0 +1,364 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2012 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   This file was created by doing:
+   gcc -gdwarf-4 -gsplit-debug -S -dA fission-base.c
+   and then massaging the output.
+*/
+
+       .file   "fission-base.c"
+
+       .text
+.Ltext0:
+
+       .globl  func
+       .type   func, @function
+func:
+.LFB0:
+       .file 1 "fission-base.c"
+       # fission-base.c:20
+       .loc 1 20 0
+       .cfi_startproc
+       pushq   %rbp    #
+       .cfi_def_cfa_offset 16
+       .cfi_offset 6, -16
+       movq    %rsp, %rbp      #,
+       .cfi_def_cfa_register 6
+       movl    %edi, -4(%rbp)  # arg, arg
+       # fission-base.c:21
+       .loc 1 21 0
+       movl    -4(%rbp), %eax  # arg, tmp61
+       addl    $1, %eax        #, D.1617
+       # fission-base.c:22
+       .loc 1 22 0
+       popq    %rbp    #
+       .cfi_def_cfa 7, 8
+       ret
+       .cfi_endproc
+.LFE0:
+       .size   func, .-func
+       .globl  main
+       .type   main, @function
+main:
+.LFB1:
+       # fission-base.c:26
+       .loc 1 26 0
+       .cfi_startproc
+       pushq   %rbp    #
+       .cfi_def_cfa_offset 16
+       .cfi_offset 6, -16
+       movq    %rsp, %rbp      #,
+       .cfi_def_cfa_register 6
+       # fission-base.c:27
+       .loc 1 27 0
+       movl    $-1, %edi       #,
+       call    func    #
+       # fission-base.c:28
+       .loc 1 28 0
+       popq    %rbp    #
+       .cfi_def_cfa 7, 8
+       ret
+       .cfi_endproc
+.LFE1:
+       .size   main, .-main
+.Letext0:
+       .section        .debug_info.dwo,"",@progbits
+.Ldebug_info0:
+       .4byte  .Ldebug_info0_end - .Ldebug_info0 - 4 # Length of Compilation Unit Info
+       .2byte  0x4     # DWARF version number
+       .4byte  .Ldebug_abbrev0 # Offset Into Abbrev. Section
+       .byte   0x8     # Pointer Size (in bytes)
+       .uleb128 0x1    # (DIE (0xb) DW_TAG_compile_unit)
+       .ascii "GNU C 4.6.x-fission\0"  # DW_AT_producer
+       .byte   0x1     # DW_AT_language
+       .ascii "fission-base.c\0"       # DW_AT_name
+       .ascii "/tmp/src/gdb/testsuite/gdb.dwarf2\0"    # DW_AT_comp_dir
+       .byte   0       # DW_AT_GNU_dwo_id
+       .byte   0
+       .byte   0
+       .byte   0
+       .byte   0
+       .byte   0
+       .byte   0
+       .byte   0
+       .uleb128 0x2    # (DIE (0x89) DW_TAG_subprogram)
+                       # DW_AT_external
+       .ascii "func\0" # DW_AT_name
+       .byte   0x1     # DW_AT_decl_file (fission-base.c)
+       .byte   0x13    # DW_AT_decl_line
+                       # DW_AT_prototyped
+       .4byte  .Ldebug_info0_int       # DW_AT_type
+       .4byte  0x0     # DW_AT_ranges
+       .uleb128 0x1    # DW_AT_frame_base
+       .byte   0x9c    # DW_OP_call_frame_cfa
+       .4byte  .Ldebug_info0_int       # DW_AT_sibling
+       .uleb128 0x3    # (DIE (0xa4) DW_TAG_formal_parameter)
+       .ascii "arg\0"  # DW_AT_name
+       .byte   0x1     # DW_AT_decl_file (fission-base.c)
+       .byte   0x13    # DW_AT_decl_line
+       .4byte  .Ldebug_info0_int       # DW_AT_type
+       .uleb128 0x2    # DW_AT_location
+       .byte   0x91    # DW_OP_fbreg
+       .sleb128 -20
+       .byte   0       # end of children of DIE 0x89
+.Ldebug_info0_int:
+       .uleb128 0x4    # (DIE (0xb3) DW_TAG_base_type)
+       .byte   0x4     # DW_AT_byte_size
+       .byte   0x5     # DW_AT_encoding
+       .ascii "int\0"  # DW_AT_name
+       .uleb128 0x5    # (DIE (0xba) DW_TAG_subprogram)
+                       # DW_AT_external
+       .ascii "main\0" # DW_AT_name
+       .byte   0x1     # DW_AT_decl_file (fission-base.c)
+       .byte   0x19    # DW_AT_decl_line
+       .4byte  .Ldebug_info0_int       # DW_AT_type
+       .uleb128 0x1    # DW_AT_low_pc
+       .8byte  .LFE1-.LFB1     # DW_AT_high_pc
+       .uleb128 0x1    # DW_AT_frame_base
+       .byte   0x9c    # DW_OP_call_frame_cfa
+       .byte   0       # end of children of DIE 0xb
+.Ldebug_info0_end:
+       .section        .debug_info,"",@progbits
+.Lskeleton_debug_info0:
+       .4byte  .Lskeleton_debug_info0_end - .Lskeleton_debug_info0 - 4 # Length of Compilation Unit Info
+       .2byte  0x4     # DWARF version number
+       .4byte  .Lskeleton_debug_abbrev0        # Offset Into Abbrev. Section
+       .byte   0x8     # Pointer Size (in bytes)
+       .uleb128 0x1    # (DIE (0) DW_TAG_compile_unit)
+       .8byte  .Ltext0 # DW_AT_low_pc
+       .8byte  .Letext0-.Ltext0        # DW_AT_high_pc
+       .4byte  .Ldebug_line0   # DW_AT_stmt_list
+       .ascii "/tmp/src/gdb/testsuite/gdb.dwarf2\0"    # DW_AT_comp_dir
+       # Normally dwo_name would be "fission-base.dwo".
+       # Simplification: Leave the DWO contents in the executable.
+       .ascii "fission-base\0" # DW_AT_GNU_dwo_name
+       .4byte  .Ldebug_pubnames0       # DW_AT_GNU_pubnames
+       .4byte  .Ldebug_pubtypes0       # DW_AT_GNU_pubtypes
+       .4byte  .Ldebug_addr0_begin     # DW_AT_GNU_addr_base
+       .4byte  .Ldebug_ranges0_begin   # DW_AT_GNU_ranges_base
+       .byte   0       # DW_AT_GNU_dwo_id
+       .byte   0
+       .byte   0
+       .byte   0
+       .byte   0
+       .byte   0
+       .byte   0
+       .byte   0
+.Lskeleton_debug_info0_end:
+       .section        .debug_abbrev,"",@progbits
+.Lskeleton_debug_abbrev0:
+       .uleb128 0x1    # (abbrev code)
+       .uleb128 0x11   # (TAG: DW_TAG_compile_unit)
+       .byte   0       # DW_children_no
+       .uleb128 0x11   # (DW_AT_low_pc)
+       .uleb128 0x1    # (DW_FORM_addr)
+       .uleb128 0x12   # (DW_AT_high_pc)
+       .uleb128 0x7    # (DW_FORM_data8)
+       .uleb128 0x10   # (DW_AT_stmt_list)
+       .uleb128 0x17   # (DW_FORM_sec_offset)
+       .uleb128 0x1b   # (DW_AT_comp_dir)
+       .uleb128 0x8    # (DW_FORM_string)
+       .uleb128 0x2130 # (DW_AT_GNU_dwo_name)
+       .uleb128 0x8    # (DW_FORM_string)
+       .uleb128 0x2134 # (DW_AT_GNU_pubnames)
+       .uleb128 0x17   # (DW_FORM_sec_offset)
+       .uleb128 0x2135 # (DW_AT_GNU_pubtypes)
+       .uleb128 0x17   # (DW_FORM_sec_offset)
+       .uleb128 0x2133 # (DW_AT_GNU_addr_base)
+       .uleb128 0x17   # (DW_FORM_sec_offset)
+       .uleb128 0x2132 # (DW_AT_GNU_ranges_base)
+       .uleb128 0x17   # (DW_FORM_sec_offset)
+       .uleb128 0x2131 # (DW_AT_GNU_dwo_id)
+       .uleb128 0x7    # (DW_FORM_data8)
+       .byte   0
+       .byte   0
+       .byte   0       # end of skeleton .debug_abbrev
+       .section        .debug_abbrev.dwo,"",@progbits
+.Ldebug_abbrev0:
+       .uleb128 0x1    # (abbrev code)
+       .uleb128 0x11   # (TAG: DW_TAG_compile_unit)
+       .byte   0x1     # DW_children_yes
+       .uleb128 0x25   # (DW_AT_producer)
+       .uleb128 0x8    # (DW_FORM_string)
+       .uleb128 0x13   # (DW_AT_language)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x3    # (DW_AT_name)
+       .uleb128 0x8    # (DW_FORM_string)
+       .uleb128 0x1b   # (DW_AT_comp_dir)
+       .uleb128 0x8    # (DW_FORM_string)
+       .uleb128 0x2131 # (DW_AT_GNU_dwo_id)
+       .uleb128 0x7    # (DW_FORM_data8)
+       .byte   0
+       .byte   0
+       .uleb128 0x2    # (abbrev code)
+       .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
+       .byte   0x1     # DW_children_yes
+       .uleb128 0x3f   # (DW_AT_external)
+       .uleb128 0x19   # (DW_FORM_flag_present)
+       .uleb128 0x3    # (DW_AT_name)
+       .uleb128 0x8    # (DW_FORM_string)
+       .uleb128 0x3a   # (DW_AT_decl_file)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x3b   # (DW_AT_decl_line)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x27   # (DW_AT_prototyped)
+       .uleb128 0x19   # (DW_FORM_flag_present)
+       .uleb128 0x49   # (DW_AT_type)
+       .uleb128 0x13   # (DW_FORM_ref4)
+       .uleb128 0x55   # (DW_AT_ranges)
+       .uleb128 0x17   # (DW_FORM_sec_offset)
+       .uleb128 0x40   # (DW_AT_frame_base)
+       .uleb128 0x18   # (DW_FORM_exprloc)
+       .uleb128 0x1    # (DW_AT_sibling)
+       .uleb128 0x13   # (DW_FORM_ref4)
+       .byte   0
+       .byte   0
+       .uleb128 0x3    # (abbrev code)
+       .uleb128 0x5    # (TAG: DW_TAG_formal_parameter)
+       .byte   0       # DW_children_no
+       .uleb128 0x3    # (DW_AT_name)
+       .uleb128 0x8    # (DW_FORM_string)
+       .uleb128 0x3a   # (DW_AT_decl_file)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x3b   # (DW_AT_decl_line)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x49   # (DW_AT_type)
+       .uleb128 0x13   # (DW_FORM_ref4)
+       .uleb128 0x2    # (DW_AT_location)
+       .uleb128 0x18   # (DW_FORM_exprloc)
+       .byte   0
+       .byte   0
+       .uleb128 0x4    # (abbrev code)
+       .uleb128 0x24   # (TAG: DW_TAG_base_type)
+       .byte   0       # DW_children_no
+       .uleb128 0xb    # (DW_AT_byte_size)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x3e   # (DW_AT_encoding)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x3    # (DW_AT_name)
+       .uleb128 0x8    # (DW_FORM_string)
+       .byte   0
+       .byte   0
+       .uleb128 0x5    # (abbrev code)
+       .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
+       .byte   0       # DW_children_no
+       .uleb128 0x3f   # (DW_AT_external)
+       .uleb128 0x19   # (DW_FORM_flag_present)
+       .uleb128 0x3    # (DW_AT_name)
+       .uleb128 0x8    # (DW_FORM_string)
+       .uleb128 0x3a   # (DW_AT_decl_file)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x3b   # (DW_AT_decl_line)
+       .uleb128 0xb    # (DW_FORM_data1)
+       .uleb128 0x49   # (DW_AT_type)
+       .uleb128 0x13   # (DW_FORM_ref4)
+       .uleb128 0x11   # (DW_AT_low_pc)
+       .uleb128 0x1f01 # (DW_FORM_GNU_addr_index)
+       .uleb128 0x12   # (DW_AT_high_pc)
+       .uleb128 0x7    # (DW_FORM_data8)
+       .uleb128 0x40   # (DW_AT_frame_base)
+       .uleb128 0x18   # (DW_FORM_exprloc)
+       .byte   0
+       .byte   0
+       .byte   0
+       .section        .debug_pubnames,"",@progbits
+.Ldebug_pubnames0:
+       .4byte  0x20    # Length of Public Names Info
+       .2byte  0x2     # DWARF Version
+       .4byte  .Lskeleton_debug_info0  # Offset of Compilation Unit Info
+       .4byte  0xd2    # Compilation Unit Length
+       .4byte  0x89    # DIE offset
+       .ascii "func\0" # external name
+       .4byte  0xba    # DIE offset
+       .ascii "main\0" # external name
+       .4byte  0
+       .section        .debug_pubtypes,"",@progbits
+.Ldebug_pubtypes0:
+       .4byte  0x16    # Length of Public Type Names Info
+       .2byte  0x2     # DWARF Version
+       .4byte  .Lskeleton_debug_info0  # Offset of Compilation Unit Info
+       .4byte  0xd2    # Compilation Unit Length
+       .4byte  .Ldebug_info0_int       # DIE offset
+       .ascii "int\0"  # external name
+       .4byte  0
+       .section        .debug_aranges,"",@progbits
+       .4byte  0x2c    # Length of Address Ranges Info
+       .2byte  0x2     # DWARF Version
+       .4byte  .Lskeleton_debug_info0  # Offset of Compilation Unit Info
+       .byte   0x8     # Size of Address
+       .byte   0       # Size of Segment Descriptor
+       .2byte  0       # Pad to 16 byte boundary
+       .2byte  0
+       .8byte  .Ltext0 # Address
+       .8byte  .Letext0-.Ltext0        # Length
+       .8byte  0
+       .8byte  0
+       .section        .debug_line,"",@progbits
+.Ldebug_line0:
+       .section        .debug_line.dwo,"",@progbits
+.Lskeleton_debug_line0:
+       .4byte  .LELT0-.LSLT0   # Length of Source Line Info
+.LSLT0:
+       .2byte  0x4     # DWARF Version
+       .4byte  .LELTP0-.LASLTP0        # Prolog Length
+.LASLTP0:
+       .byte   0x1     # Minimum Instruction Length
+       .byte   0x1     # Maximum Operations Per Instruction
+       .byte   0x1     # Default is_stmt_start flag
+       .byte   0xf6    # Line Base Value (Special Opcodes)
+       .byte   0xf5    # Line Range Value (Special Opcodes)
+       .byte   0xa     # Special Opcode Base
+       .byte   0       # opcode: 0x1 has 0 args
+       .byte   0x1     # opcode: 0x2 has 1 args
+       .byte   0x1     # opcode: 0x3 has 1 args
+       .byte   0x1     # opcode: 0x4 has 1 args
+       .byte   0x1     # opcode: 0x5 has 1 args
+       .byte   0       # opcode: 0x6 has 0 args
+       .byte   0       # opcode: 0x7 has 0 args
+       .byte   0       # opcode: 0x8 has 0 args
+       .byte   0x1     # opcode: 0x9 has 1 args
+       .byte   0       # End directory table
+       .ascii "fission-base.c\0"       # File Entry: 0x1
+       .uleb128 0
+       .uleb128 0
+       .uleb128 0
+       .byte   0       # End file name table
+.LELTP0:
+.LELT0:
+       .section        .debug_addr,"",@progbits
+.Ldebug_addr0:
+       # Shift the real entries down by a non-zero amount to test
+       # DW_AT_GNU_addr_base.
+       .8byte  0,0
+.Ldebug_addr0_begin:
+       .8byte  .LFB0   # DW_AT_low_pc
+       .8byte  .LFB1   # DW_AT_low_pc
+
+       .section        .debug_ranges,"",@progbits
+.Ldebug_ranges0:
+       # Shift the real entries down by a non-zero amount to test
+       # DW_AT_GNU_ranges_base.
+       .8byte  0,0
+.Ldebug_ranges0_begin:
+       # Note: Since the DW_TAG_compile_unit specifies low_pc, that sets
+       # the base address, and thus we have to subtract it here.
+       .8byte  .LFB0 - .Ltext0 # Offset 0
+       .8byte  .LFE0 - .Ltext0
+       .8byte  0
+       .8byte  0
+
+       .section        .note.GNU-stack,"",@progbits

diff --git a/gdb/testsuite/gdb.dwarf2/fission-base.c b/gdb/testsuite/gdb.dwarf2/fission-base.c
new file mode 100644 (file)
index 0000000..f2eb387
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/fission-base.c
@@ -0,0 +1,28 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2012 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+int
+func (int arg)
+{
+  return arg + 1;
+}
+
+int
+main ()
+{
+  return func (-1);
+}

diff --git a/gdb/testsuite/gdb.dwarf2/fission-base.exp b/gdb/testsuite/gdb.dwarf2/fission-base.exp
new file mode 100644 (file)
index 0000000..2bd2748
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/fission-base.exp
@@ -0,0 +1,64 @@
+# Copyright 2012 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+load_lib dwarf.exp
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if ![dwarf2_support] {
+    return 0  
+}
+
+# This test can only be run on x86-64 targets.
+if {![istarget x86_64-*] || ![is_lp64_target]} {
+    return 0
+}
+
+set basename "fission-base"
+
+standard_testfile .S
+
+# IWBN to use prepare_for_testing here, but we need to set debug-file-directory
+# before we load the binary.
+
+if { [build_executable "$testfile.exp" "$testfile" "$srcfile" {nodebug}] } {
+    return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+# Set debug-file-directory so we find the dwo file.
+gdb_test_no_output "set debug-file-directory $subdir"
+gdb_load [standard_output_file $testfile]
+
+if ![runto_main] {
+    return -1
+}
+
+# Do a few basic things to verify we're finding the DWO debug info.
+
+gdb_test "ptype main" "type = int \\(\\)"
+gdb_test "ptype func" "type = int \\(int\\)"
+
+gdb_test "frame" "#0 *main \\(\\) at $testfile\\.c:$decimal.*" \
+    "frame in main"
+
+gdb_test "break func" "Breakpoint.*at.* file .*$testfile\\.c, line .*"
+
+gdb_test "continue" "Breakpoint.* func \\(arg=-1\\).*" \
+    "continue to func"
+
+gdb_test "frame" "#0 *func \\(arg=-1\\) at $testfile\\.c:$decimal.*" \
+    "frame in func"