1 # Copyright 2013-2024 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 require dwarf2_support
21 require allow_cplus_tests
23 standard_testfile main.c -dw.S
25 # Make some DWARF for the test.
26 set asm_file [standard_output_file $srcfile2]
28 Dwarf::assemble $asm_file {
29 # Using a funny address size here and in the pointer type lets us
30 # also check for a sign-extension bug in the
31 # DW_OP_GNU_implicit_pointer code.
34 declare_labels struct_label short_type_label
35 declare_labels char_type_label ptr_label
36 declare_labels var_label
38 struct_label: structure_type {
40 {byte_size 4 DW_FORM_sdata}
44 {type :$short_type_label}
45 {data_member_location 0 DW_FORM_sdata}
49 {type :$char_type_label}
50 {data_member_location 2 DW_FORM_sdata}
54 {type :$char_type_label}
55 {data_member_location 3 DW_FORM_sdata}
59 short_type_label: base_type {
61 {encoding @DW_ATE_signed}
62 {byte_size 2 DW_FORM_sdata}
65 char_type_label: base_type {
67 {encoding @DW_ATE_signed}
68 {byte_size 1 DW_FORM_sdata}
71 # See comment above to understand the pointer size.
72 ptr_label: pointer_type {
73 {byte_size 2 DW_FORM_sdata}
74 {type :$char_type_label}
77 var_label: DW_TAG_variable {
97 GNU_implicit_pointer $var_label 2
104 if { [prepare_for_testing "failed to prepare" ${testfile} \
105 [list $srcfile $asm_file] {nodebug}] } {
113 # Determine byte order.
114 set endian [get_endianness]
116 # Access the second byte of s through an implicit pointer to the third
117 # byte of s, using a negative offset. Compare that to the second byte of
118 # the short integer 0x5678 in target byte order.
119 switch $endian { little {set val 0x56} big {set val 0x78} }
120 gdb_test "p/x p\[-1\]" " = $val"