diff options
| author | Philippe Mathieu-Daudé <f4bug@amsat.org> | 2021-05-02 21:09:00 +0200 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2021-05-13 19:18:42 +0200 |
| commit | 29f9c636894c462fa54fad08049e51877905e93b (patch) | |
| tree | a11a2821f5adcb5ff1bca191081a5079f92e3798 /target | |
| parent | 6cd04a88fa3fc5941fcd3677355e1b75efe9c7a8 (diff) | |
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>
Diffstat (limited to 'target')
| -rw-r--r-- | target/avr/helper.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/target/avr/helper.c b/target/avr/helper.c index 35e1019594..981c29da45 100644 --- a/target/avr/helper.c +++ b/target/avr/helper.c @@ -188,11 +188,7 @@ void helper_break(CPUAVRState *env) void helper_wdr(CPUAVRState *env) { - CPUState *cs = env_cpu(env); - - /* WD is not implemented yet, placeholder */ - cs->exception_index = EXCP_DEBUG; - cpu_loop_exit(cs); + qemu_log_mask(LOG_UNIMP, "WDG reset (not implemented)\n"); } /* |