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- # Copyright 2020-2022 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/>.
- # Let the user override the path to the simavr binary with the SIMAVR_PATH
- # environment variable.
- if { [info exists ::env(SIMAVR_PATH)] } {
- set simavr_path $::env(SIMAVR_PATH)
- } else {
- set simavr_path simavr
- }
- # Let the user override the simulated AVR chip with the SIMAVR_PATH environment
- # variable.
- #
- # The value passed here must be supported by avr-gcc (see the -mmcu flag in the
- # `AVR Options` section of the gcc(1) man page) and by simavr (see output of
- # `simavr --list-cores`).
- if { [info exists ::env(SIMAVR_MCU)] } {
- set simavr_mcu $::env(SIMAVR_MCU)
- } else {
- set simavr_mcu atmega2560
- }
- set simavr_last_load_file ""
- set simavr_spawn_id ""
- set_board_info compiler avr-gcc
- set_board_info c++compiler avr-g++
- set_board_info cflags "-mmcu=${simavr_mcu}"
- set_board_info ldflags "-mmcu=${simavr_mcu}"
- # As of version 10, GCC produces stabs by default for AVR. Force it to use
- # DWARF.
- set_board_info debug_flags "-gdwarf-4"
- set_board_info use_gdb_stub 1
- set_board_info gdb_protocol "remote"
- set_board_info gdb,do_reload_on_run 1
- set_board_info noargs 1
- set_board_info gdb,noinferiorio 1
- set_board_info gdb,nofileio 1
- set_board_info gdb,noresults 1
- set_board_info gdb,nosignals 1
- proc gdb_load { file } {
- global simavr_last_load_file
- global simavr_spawn_id
- global simavr_mcu
- global simavr_path
- global gdb_prompt
- if { $file == "" } {
- set file $simavr_last_load_file
- } else {
- set simavr_last_load_file $file
- }
- gdb_file_cmd $file
- # Close any previous simavr instance.
- if { $simavr_spawn_id != "" } {
- verbose -log "simavr: closing previous spawn id $simavr_spawn_id"
- if [catch { close -i $simavr_spawn_id } != 0] {
- warning "simavr: failed to close connection to previous simavr instance"
- }
- wait -i $simavr_spawn_id
- set simavr_spawn_id ""
- }
- # Run simavr.
- set cmd "spawn -noecho ${simavr_path} --mcu ${simavr_mcu} -g $file"
- verbose -log "Spawning simavr: $cmd"
- eval $cmd
- set simavr_spawn_id $spawn_id
- verbose -log "simavr: simavr spawned with spawn id $simavr_spawn_id, pid [exp_pid $simavr_spawn_id]"
- # Wait for "listening on port" message of simavr.
- expect {
- -i $simavr_spawn_id -re ".*avr_gdb_init listening on port 1234" {}
- timeout {
- verbose -log "simavr: timeout, closing simavr spawn id"
- close -i $simavr_spawn_id
- verbose -log "simavr: timeout, waiting for simavr process exit"
- wait -i $simavr_spawn_id
- set simavr_spawn_id ""
- error "unable to start simavr: timeout"
- }
- eof {
- verbose -log "simavr: eof, waiting for simavr process exit"
- wait -i $simavr_spawn_id
- set simavr_spawn_id ""
- error "unable to start simavr: eof"
- }
- }
- # Connect to simavr.
- send_gdb "target remote :1234\n"
- gdb_expect {
- -re ".*Remote debugging using :1234.*\[\r\n\]+$gdb_prompt $" {}
- timeout {
- verbose -log "simavr: unable to connect to simavr, closing simavr spawn id"
- close -i $simavr_spawn_id
- verbose -log "simavr: unable to connect to simavr, waiting for simavr process exit"
- wait -i $simavr_spawn_id
- set simavr_spawn_id ""
- error "unable to connect to simavr stub"
- }
- }
- return 0
- }
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