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id = 855
title = "Prebuilt seabios vgabios-stdvga binary causes onboot kernel panics for freebsd 10.0"
state = "closed"
created_at = "2022-02-03T16:59:03.685Z"
closed_at = "2023-08-02T14:32:06.642Z"
labels = ["target: i386"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/855"
host-os = "Ubuntu 21.10"
host-arch = "x86"
qemu-version = "6.0.0"
guest-os = "FreeBSD 10.0-RELEASE"
guest-arch = "x86"
description = """FreeBSD 10.0 panics on boot since commit: `0221d73ce6a8e075adaa0a35a6ef853d2652b855`, see my attached screenshot of the panic.
I digged a bit into what specifically causes the issue, it seems to be caused by the precompiled `vgabios-stdvga.bin`.
I don't see this issue come up when I compile the binary myself via the `roms/` folder with different versions of gcc via gcc docker containers.
But once I compile the `vgabios-stdvga` from the `roms/` folder with a more modern Ubuntu version (21.10) using gcc 11.2, I also get panics on my `vgabios-stdvga`.
At first I thought it was caused by a different gcc version, but since the buster gcc docker container images create correctly functioning `vgabios-stdvga.bin` binaries, I think this is caused by a newer version of the linker coming from the `binutils` package.
My local Ubuntu version has version 2.37 of the binutils package, the `gcc:11.2` container which compiles a correct `vgabios-stdvga.bin` has version `2.35.2` of the binutils package.
"""
reproduce = """1. Compile any version after the mentioned commit using the precompiled seabios binaries
2. Try to boot freebsd 10.0-RELEASE
3. Kernel panic because of a page vault during the vesa module load."""
additional = """https://mfsbsd.vx.sk/files/iso/10/amd64/mfsbsd-10.0-RELEASE-amd64.iso"""
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