id = 1568
title = "qemu-system-m68k fails whenever the option \"-d cpu_reset\" is specified"
state = "opened"
created_at = "2023-03-30T13:49:11.717Z"
closed_at = "n/a"
labels = ["target: m68k"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/1568"
host-os = "Ubuntu 18.04.6 LTS"
host-arch = "x86_64"
qemu-version = "QEMU emulator version 7.2.92 (v8.0.0-rc2)"
guest-os = "None"
guest-arch = "m68k"
description = """When specifying the option "-d cpu_reset", the following output is generated, and QEMU eventually crashes with a Segmentation fault:
```
CPU Reset (CPU 0)
D0 = 00000000   A0 = 00000000   F0 = 0000 0000000000000000  (           0)
D1 = 00000000   A1 = 00000000   F1 = 0000 0000000000000000  (           0)
D2 = 00000000   A2 = 00000000   F2 = 0000 0000000000000000  (           0)
D3 = 00000000   A3 = 00000000   F3 = 0000 0000000000000000  (           0)
D4 = 00000000   A4 = 00000000   F4 = 0000 0000000000000000  (           0)
D5 = 00000000   A5 = 00000000   F5 = 0000 0000000000000000  (           0)
D6 = 00000000   A6 = 00000000   F6 = 0000 0000000000000000  (           0)
D7 = 00000000   A7 = 00000000   F7 = 0000 0000000000000000  (           0)
PC = 00000000   qemu: fatal: Bad CC_OP 0
D0 = 00000000   A0 = 00000000   F0 = 0000 0000000000000000  (           0)
D1 = 00000000   A1 = 00000000   F1 = 0000 0000000000000000  (           0)
D2 = 00000000   A2 = 00000000   F2 = 0000 0000000000000000  (           0)
D3 = 00000000   A3 = 00000000   F3 = 0000 0000000000000000  (           0)
D4 = 00000000   A4 = 00000000   F4 = 0000 0000000000000000  (           0)
D5 = 00000000   A5 = 00000000   F5 = 0000 0000000000000000  (           0)
D6 = 00000000   A6 = 00000000   F6 = 0000 0000000000000000  (           0)
D7 = 00000000   A7 = 00000000   F7 = 0000 0000000000000000  (           0)
...
D0 = 00000000   A0 = 00000000   F0 = 0000 0000000000000000  (           0)
D1 = 00000000   A1 = 00000000   F1 = 0000 0000000000000000  (           0)
D2 = 00000000   A2 = 00000000   F2 = 0000 0000000000000000  (           0)
D3 = 00000000   A3 = 00000000   F3 = 0000 0000000000000000  (           0)
D4 = 00000000   A4 = 00000000   F4 = 0000 0000000000000000  (           0)
D5 = 00000000   A5 = 00000000   F5 = 0000 0000000000000000  (           0)
D6 = 00000000   A6 = 00000000   F6 = 0000 0000000000000000  (           0)
D7 = 00000000   A7 = 00000000   F7 = 0000 0000000000000000  (           0)
PC = 00000000   qemu: fatal: Bad CC_OP 0
Segmentation fault (core dumped)
```
This also happens with the other m68k machine types."""
reproduce = """1. Run QEMU with the given command line."""
additional = """"""