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# Copyright 2025 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/>.
# Check that we can get DW_OP_entry_value at function entry.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
require dwarf2_support
standard_testfile .c -debug.S
set test "get dwarf regnum for first argument register"
if { [is_x86_64_m64_target] } {
set dwarf_regnum 5
} elseif { [istarget riscv64*] } {
set dwarf_regnum 10
} else {
set reason "architecture-specific setting missing"
unsupported "$test ($reason)"
return
}
pass $test
# Set up the DWARF for the test.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
global srcdir subdir srcfile
get_func_info main
get_func_info bar
cu {} {
DW_TAG_compile_unit {
{DW_AT_name $srcfile}
} {
declare_labels integer
integer: DW_TAG_base_type {
{DW_AT_byte_size 8 DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
{DW_AT_name integer}
}
DW_TAG_subprogram {
{ DW_AT_name main }
{ DW_AT_low_pc $main_start DW_FORM_addr }
{ DW_AT_high_pc $main_end DW_FORM_addr }
} {
DW_TAG_variable {
{ DW_AT_name argc }
{ DW_AT_type :$integer }
{ DW_AT_location {
DW_OP_entry_value {
DW_OP_regx $::dwarf_regnum
}
} SPECIAL_expr }
}
}
DW_TAG_subprogram {
{ DW_AT_name bar }
{ DW_AT_low_pc $bar_start DW_FORM_addr }
{ DW_AT_high_pc $bar_end DW_FORM_addr }
} {
DW_TAG_variable {
{ DW_AT_name foo }
{ DW_AT_type :$integer }
{ DW_AT_location {
DW_OP_entry_value {
DW_OP_bregx $::dwarf_regnum 0
DW_OP_deref_size 4
}
DW_OP_stack_value
} SPECIAL_expr }
}
}
}
}
}
if { [prepare_for_testing "failed to prepare" $testfile \
[list $srcfile $asm_file] {nodebug}] } {
return -1
}
if { ![runto *main] } {
return
}
with_test_prefix "at main+0" {
gdb_test "p argc" " = 1"
gdb_test "stepi"
}
with_test_prefix "at main+1" {
gdb_test "p argc" " = <optimized out>"
}
gdb_breakpoint "*bar"
gdb_continue_to_breakpoint "bar"
with_test_prefix "at bar+0" {
gdb_test "p foo" " = 2"
gdb_test "stepi"
}
with_test_prefix "at bar+1" {
gdb_test "p foo" " = <optimized out>"
}
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