OS started to crash with a message: "Trying to execute code outside RAM or ROM"

[Konstantin Tcholokachvili]

There is a project (https://github.com/narke/colorForth ) wich always worked with qemu up to version 2.5.1.1 but doesn't works from version 2.6 onwards. It continues to work with bochs.

Downlaod: git clone https://github.com/narke/colorForth.git
Build: make
Test: qemu-system-i386 -drive format=raw,file=cf2012.img,index=0,if=floppy

System information: Ubuntu LTS 16.04 x86-64
Affected qemu versions: 2.6 to present (2.8)

I got the message:

WARNING: Image format was not specified for 'cf2012.img' and probing guessed raw.
         Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
         Specify the 'raw' format explicitly to remove the restrictions.
qemu-system-i386: Trying to execute code outside RAM or ROM at 0x8998c426
This usually means one of the following happened:

(1) You told QEMU to execute a kernel for the wrong machine type, and it crashed on startup (eg trying to run a raspberry pi kernel on a versatilepb QEMU machine)
(2) You didn't give QEMU a kernel or BIOS filename at all, and QEMU executed a ROM full of no-op instructions until it fell off the end
(3) Your guest kernel has a bug and crashed by jumping off into nowhere

This is almost always one of the first two, so check your command line and that you are using the right type of kernel for this machine.
If you think option (3) is likely then you can try debugging your guest with the -d debug options; in particular -d guest_errors will cause the log to include a dump of the guest register state at this point.

Execution cannot continue; stopping here.

Thank you in advance.

[Thomas Huth (th-huth)]

The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting all older bugs to
"Incomplete" now.
If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Thank you and sorry for the inconvenience.

[Launchpad Janitor (janitor)]

[Expired for QEMU because there has been no activity for 60 days.]