qemu-e2k/target/avr
Philippe Mathieu-Daudé 29f9c63689 target/avr: Ignore unimplemented WDR opcode
Running the WDR opcode triggers a segfault:

  $ cat > foo.S << EOF
  > __start:
  >     wdr
  > EOF
  $ avr-gcc -nostdlib -nostartfiles -mmcu=avr6 foo.S -o foo.elf
  $ qemu-system-avr -serial mon:stdio -nographic -no-reboot \
    -M mega -bios foo.elf -d in_asm --singlestep
  IN:
  0x00000000:  WDR
  Segmentation fault (core dumped)

  (gdb) bt
     #0  0x00005555add0b23a in gdb_get_cpu_pid (cpu=0x5555af5a4af0) at ../gdbstub.c:718
     #1  0x00005555add0b2dd in gdb_get_cpu_process (cpu=0x5555af5a4af0) at ../gdbstub.c:743
     #2  0x00005555add0e477 in gdb_set_stop_cpu (cpu=0x5555af5a4af0) at ../gdbstub.c:2742
     #3  0x00005555adc99b96 in cpu_handle_guest_debug (cpu=0x5555af5a4af0) at ../softmmu/cpus.c:306
     #4  0x00005555adcc66ab in rr_cpu_thread_fn (arg=0x5555af5a4af0) at ../accel/tcg/tcg-accel-ops-rr.c:224
     #5  0x00005555adefaf12 in qemu_thread_start (args=0x5555af5d9870) at ../util/qemu-thread-posix.c:521
     #6  0x00007f692d940ea5 in start_thread () from /lib64/libpthread.so.0
     #7  0x00007f692d6699fd in clone () from /lib64/libc.so.6

Since the watchdog peripheral is not implemented, simply
log the opcode as unimplemented and keep going.

Reported-by: Fred Konrad <konrad@adacore.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: KONRAD Frederic <frederic.konrad@adacore.com>
Message-Id: <20210502190900.604292-1-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-13 19:18:42 +02:00
..
cpu-param.h
cpu-qom.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
cpu.c target/avr/cpu: Use device_class_set_parent_realize() 2021-02-20 12:36:19 +01:00
cpu.h target/avr: Add support for disassembling via option '-d in_asm' 2020-07-11 11:02:05 +02:00
disas.c meson: target 2020-08-21 06:30:35 -04:00
gdbstub.c target/avr: CPU class: Add GDB support 2020-07-10 17:58:32 +02:00
helper.c target/avr: Ignore unimplemented WDR opcode 2021-05-13 19:18:42 +02:00
helper.h target/avr: Add instruction helpers 2020-07-11 11:02:05 +02:00
insn.decode target/avr: Add instruction translation - MCU Control Instructions 2020-07-11 11:02:05 +02:00
machine.c migration: Replace migration's JSON writer by the general one 2020-12-19 10:39:16 +01:00
meson.build meson: target 2020-08-21 06:30:35 -04:00
translate.c meson: target 2020-08-21 06:30:35 -04:00