[gdb/testsuite] Fix gdb.dwarf2/dw2-lines.exp with -m32

When running test-case gdb.dwarf2/dw2-lines.exp with target board -unix/-m32,
we run into another instance of PR28383, where the dwarf assembler generates
64-bit relocations which are not supported by the 32-bit assembler:
...
dw2-lines-dw.S: Assembler messages:^M
outputs/gdb.dwarf2/dw2-lines/dw2-lines-dw.S:76: Error: \
  cannot represent relocation type BFD_RELOC_64^M
...

Fix this by using _op_offset in _line_finalize_header.

Tested on x86_64-linux.

diff --git a/gdb/testsuite/lib/dwarf.exp b/gdb/testsuite/lib/dwarf.exp
index cbb1bf6985aec8928605c53ce7cc243a11f1aeb2..94f67652e19e5c3dd2b83d113c068fade1860124 100644 (file)
--- a/gdb/testsuite/lib/dwarf.exp
+++ b/gdb/testsuite/lib/dwarf.exp
@@ -2349,11 +2349,7 @@ namespace eval Dwarf {
                                string_ptr:
                                _op .ascii [_quote $dirname]
                            }
-                           if { $_line_is_64 } {
-                               _op .8byte $string_ptr
-                           } else {
-                               _op .4byte $string_ptr
-                           }
+                           _op_offset [expr $_line_is_64 ? 8 : 4] $string_ptr
                        }
                    }
                }
@@ -2398,11 +2394,7 @@ namespace eval Dwarf {
                                string_ptr:
                                _op .ascii [_quote $filename]
                            }
-                           if { $_line_is_64 } {
-                               _op .8byte $string_ptr
-                           } else {
-                               _op .4byte $string_ptr
-                           }
+                           _op_offset [expr $_line_is_64 ? 8 : 4] $string_ptr
                        }
                    }
                    _op .uleb128 $diridx