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130 lines
3.2 KiB
Plaintext
130 lines
3.2 KiB
Plaintext
# Copyright 2013-2018 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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load_lib dwarf.exp
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# This test can only be run on targets which support DWARF-2 and use gas.
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if {![dwarf2_support]} {
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return 0
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}
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if { [skip_cplus_tests] } { continue }
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standard_testfile main.c implptrpiece-dw.S
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# Make some DWARF for the test.
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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# Using a funny address size here and in the pointer type lets us
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# also check for a sign-extension bug in the
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# DW_OP_GNU_implicit_pointer code.
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cu { addr_size 2 } {
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compile_unit {} {
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declare_labels struct_label short_type_label
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declare_labels char_type_label ptr_label
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declare_labels var_label
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struct_label: structure_type {
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{name S}
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{byte_size 4 DW_FORM_sdata}
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} {
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member {
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{name a}
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{type :$short_type_label}
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{data_member_location 0 DW_FORM_sdata}
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}
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member {
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{name b}
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{type :$char_type_label}
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{data_member_location 2 DW_FORM_sdata}
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}
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member {
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{name c}
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{type :$char_type_label}
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{data_member_location 3 DW_FORM_sdata}
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}
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}
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short_type_label: base_type {
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{name "short int"}
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{encoding @DW_ATE_signed}
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{byte_size 2 DW_FORM_sdata}
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}
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char_type_label: base_type {
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{name "signed char"}
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{encoding @DW_ATE_signed}
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{byte_size 1 DW_FORM_sdata}
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}
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# See comment above to understand the pointer size.
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ptr_label: pointer_type {
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{byte_size 2 DW_FORM_sdata}
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{type :$char_type_label}
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}
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var_label: DW_TAG_variable {
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{name s}
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{type :$struct_label}
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{location {
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const2u 0x5678
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stack_value
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piece 2
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const1u 2
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stack_value
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piece 1
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const1u 3
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stack_value
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piece 1
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} SPECIAL_expr}
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}
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DW_TAG_variable {
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{name p}
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{type :$ptr_label}
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{location {
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GNU_implicit_pointer $var_label 2
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} SPECIAL_expr}
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}
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}
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}
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}
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if { [build_executable ${testfile}.exp ${testfile} \
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[list $srcfile $asm_file] {nodebug}] } {
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return -1
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}
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# We need --readnow because otherwise we never read in the CU we
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# created above.
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set saved_gdbflags $GDBFLAGS
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set GDBFLAGS "$GDBFLAGS -readnow"
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clean_restart ${testfile}
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set GDBFLAGS $saved_gdbflags
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if ![runto_main] {
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return -1
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}
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# Determine byte order.
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set endian [get_endianness]
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# Access the second byte of s through an implicit pointer to the third
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# byte of s, using a negative offset. Compare that to the second byte of
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# the short integer 0x5678 in target byte order.
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switch $endian { little {set val 0x56} big {set val 0x78} }
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gdb_test "p/x p\[-1\]" " = $val"
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