id = 2360
title = "qemu-system-m68k: double mmu fault"
state = "opened"
created_at = "2024-05-24T10:20:56.012Z"
closed_at = "n/a"
labels = ["target: m68k"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2360"
host-os = "Fedora 40, Windows 11"
host-arch = "x86_64"
qemu-version = "from latest source"
guest-os = "Mac OS 7.5.3"
guest-arch = "m68k"
description = """Shutting down Mac OS 7.5.3 after boot from CD image results in a double MMU fault.
qemu: fatal: DOUBLE MMU FAULT

D0 = 00000008   A0 = 22152a78   F0 = 7fff ffffffffffffffff  (         nan)\\
D1 = 40810000   A1 = 0000c190   F1 = 7fff ffffffffffffffff  (         nan)\\
D2 = 00010490   A2 = 000207a0   F2 = 7fff ffffffffffffffff  (         nan)\\
D3 = 0002befe   A3 = a88879d0   F3 = 7fff ffffffffffffffff  (         nan)\\
D4 = db6d0000   A4 = 00041a86   F4 = 7fff ffffffffffffffff  (         nan)\\
D5 = 00000000   A5 = 39ec4080   F5 = 7fff ffffffffffffffff  (         nan)\\
D6 = 00000001   A6 = 00053178   F6 = 7fff ffffffffffffffff  (         nan)\\
D7 = 07b6d258   A7 = 00000004   F7 = 7fff ffffffffffffffff  (         nan)\\

PC = 97f87008   SR = 2210 T:0 I:2 SI X---- \\
FPSR = 00000000 ---- \\
FPCR =     0000 X RN \\
A7(MSP) = 00000000   A7(USP) = 00000000 ->A7(ISP) = 00000004 \\
VBR = 0x00000000 \\
SFC = 0 DFC 5 \\
SSW 00000505 TCR 0000c000 URP 00000000 SRP 07fffa00 \\
DTTR0/1: f900c060/807fc040 ITTR0/1: f900c060/807fc040 \\
MMUSR 00000000, fault at fffffffc \\"""
reproduce = """1. Boot from CD image
2. Choose Shut down from the Special menu"""
additional = """Reproducing requires a quadra 800 rom file.\\
A CD image (f.e. SYSTEM_7-5-3-RETAIL.ISO) can be obtained here: https://macintoshgarden.org/apps/macintosh-os-755 \\
Also see here: https://gitlab.com/qemu-project/qemu/-/issues/2249"""