1 # Copyright 2020-2022 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/>.
16 # Let the user override the path to the simavr binary with the SIMAVR_PATH
17 # environment variable.
19 if { [info exists ::env(SIMAVR_PATH)] } {
20 set simavr_path $::env(SIMAVR_PATH)
22 set simavr_path simavr
25 # Let the user override the simulated AVR chip with the SIMAVR_PATH environment
28 # The value passed here must be supported by avr-gcc (see the -mmcu flag in the
29 # `AVR Options` section of the gcc(1) man page) and by simavr (see output of
30 # `simavr --list-cores`).
32 if { [info exists ::env(SIMAVR_MCU)] } {
33 set simavr_mcu $::env(SIMAVR_MCU)
35 set simavr_mcu atmega2560
38 set simavr_last_load_file ""
39 set simavr_spawn_id ""
41 set_board_info compiler avr-gcc
42 set_board_info c++compiler avr-g++
44 set_board_info cflags "-mmcu=${simavr_mcu}"
45 set_board_info ldflags "-mmcu=${simavr_mcu}"
47 # As of version 10, GCC produces stabs by default for AVR. Force it to use
49 set_board_info debug_flags "-gdwarf-4"
51 set_board_info use_gdb_stub 1
52 set_board_info gdb_protocol "remote"
53 set_board_info gdb,do_reload_on_run 1
54 set_board_info noargs 1
55 set_board_info gdb,noinferiorio 1
56 set_board_info gdb,nofileio 1
57 set_board_info gdb,noresults 1
58 set_board_info gdb,nosignals 1
60 proc gdb_load { file } {
61 global simavr_last_load_file
62 global simavr_spawn_id
68 set file $simavr_last_load_file
70 set simavr_last_load_file $file
75 # Close any previous simavr instance.
76 if { $simavr_spawn_id != "" } {
77 verbose -log "simavr: closing previous spawn id $simavr_spawn_id"
78 if [catch { close -i $simavr_spawn_id } != 0] {
79 warning "simavr: failed to close connection to previous simavr instance"
82 wait -i $simavr_spawn_id
83 set simavr_spawn_id ""
87 set cmd "spawn -noecho ${simavr_path} --mcu ${simavr_mcu} -g $file"
88 verbose -log "Spawning simavr: $cmd"
90 set simavr_spawn_id $spawn_id
92 verbose -log "simavr: simavr spawned with spawn id $simavr_spawn_id, pid [exp_pid $simavr_spawn_id]"
94 # Wait for "listening on port" message of simavr.
96 -i $simavr_spawn_id -re ".*avr_gdb_init listening on port 1234" {}
98 verbose -log "simavr: timeout, closing simavr spawn id"
99 close -i $simavr_spawn_id
100 verbose -log "simavr: timeout, waiting for simavr process exit"
101 wait -i $simavr_spawn_id
102 set simavr_spawn_id ""
103 error "unable to start simavr: timeout"
106 verbose -log "simavr: eof, waiting for simavr process exit"
107 wait -i $simavr_spawn_id
108 set simavr_spawn_id ""
109 error "unable to start simavr: eof"
114 send_gdb "target remote :1234\n"
116 -re ".*Remote debugging using :1234.*\[\r\n\]+$gdb_prompt $" {}
118 verbose -log "simavr: unable to connect to simavr, closing simavr spawn id"
119 close -i $simavr_spawn_id
120 verbose -log "simavr: unable to connect to simavr, waiting for simavr process exit"
121 wait -i $simavr_spawn_id
122 set simavr_spawn_id ""
123 error "unable to connect to simavr stub"