1 # Copyright 2013-2023 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 # This test can only be run on targets which support DWARF-2 and use gas.
19 if {![dwarf2_support]} {
23 if { [skip_cplus_tests] } { continue }
25 standard_testfile main.c -dw.S
27 # Make some DWARF for the test.
28 set asm_file [standard_output_file $srcfile2]
30 Dwarf::assemble $asm_file {
31 # Using a funny address size here and in the pointer type lets us
32 # also check for a sign-extension bug in the
33 # DW_OP_GNU_implicit_pointer code.
36 declare_labels struct_label short_type_label
37 declare_labels char_type_label ptr_label
38 declare_labels var_label
40 struct_label: structure_type {
42 {byte_size 4 DW_FORM_sdata}
46 {type :$short_type_label}
47 {data_member_location 0 DW_FORM_sdata}
51 {type :$char_type_label}
52 {data_member_location 2 DW_FORM_sdata}
56 {type :$char_type_label}
57 {data_member_location 3 DW_FORM_sdata}
61 short_type_label: base_type {
63 {encoding @DW_ATE_signed}
64 {byte_size 2 DW_FORM_sdata}
67 char_type_label: base_type {
69 {encoding @DW_ATE_signed}
70 {byte_size 1 DW_FORM_sdata}
73 # See comment above to understand the pointer size.
74 ptr_label: pointer_type {
75 {byte_size 2 DW_FORM_sdata}
76 {type :$char_type_label}
79 var_label: DW_TAG_variable {
99 GNU_implicit_pointer $var_label 2
106 if { [build_executable ${testfile}.exp ${testfile} \
107 [list $srcfile $asm_file] {nodebug}] } {
111 # We need --readnow because otherwise we never read in the CU we
113 set saved_gdbflags $GDBFLAGS
114 set GDBFLAGS "$GDBFLAGS -readnow"
115 clean_restart ${testfile}
116 set GDBFLAGS $saved_gdbflags
122 # Determine byte order.
123 set endian [get_endianness]
125 # Access the second byte of s through an implicit pointer to the third
126 # byte of s, using a negative offset. Compare that to the second byte of
127 # the short integer 0x5678 in target byte order.
128 switch $endian { little {set val 0x56} big {set val 0x78} }
129 gdb_test "p/x p\[-1\]" " = $val"