BFE EngineeringandClaude Fable 5
bf3c93cf85
The third simulator (deliberately not named "sim"): a QEMU -M virt VM that boots the real 6.18.46 kernel and enters at -kernel zImage — everything below (BootROM/idblock/U-Boot/real BCB A/B selection) is closed blobs + mask ROM and is explicitly out of scope. - qemu/mkinitramfs.sh: pinned static busybox (sha256 fail-closed) + rootfs/ - qemu/mkimage.sh: unprivileged sparse disk image with the device's canonical 12-partition blkdevparts A/B layout (vda == mmcblk0 mapping) - qemu/rootfs/: stage-1 init (by-name symlinks from PARTNAME uevents, whole-token warden.slot= parse, switch_root) + stage-2 init (userdata/oem mounts, slirp networking, payload daemon start) - qemu/run.sh: runner with --slot/--rtc/--watchdog/--rs485/--qmp/--display - qemu/configs/virt.fragment + WARDEN_KCONFIG_FRAGMENT hook in build/build-kernel.sh (canonical RV1106 build untouched when unset): adds PCI, pci-serial, i6300esb watchdog, WireGuard, virtio-gpu/input - qemu/tests/boot-smoke.sh: sentinel-asserting boot test Verified on QEMU 10.0.11: canonical zImage boots -M virt unmodified (the feared DEBUG_UNCOMPRESS decompressor hang does not exist in 6.18); full stack boots both slots; 12 by-name symlinks; userdata persists across reboot; -rtc base=2021-01-01 reproduces the no-RTC wrong-clock class. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018HUayid7W5w7jBdb9Rrj1K
33 lines
1.0 KiB
Plaintext
Executable File
33 lines
1.0 KiB
Plaintext
Executable File
#!/bin/busybox sh
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# WardenOS QEMU device sim: initramfs /init (PID 1).
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#
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# Phase-1 duty: prove the kernel booted on -M virt — print the sentinel the
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# smoke test greps for, then power off (PSCI SYSTEM_OFF, so qemu exits).
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# `warden.shell` on the kernel cmdline drops to an interactive shell instead.
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/bin/busybox mount -t devtmpfs devtmpfs /dev 2>/dev/null
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# The cpio archive carries no device nodes (it is built unprivileged, no
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# mknod); reopen stdio on the real console now that devtmpfs is mounted.
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exec </dev/console >/dev/console 2>&1
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/bin/busybox --install -s /bin
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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echo "WARDEN-QEMU-BOOT-OK"
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# With a virtio disk attached, hand over to the stage-1 rc (by-name symlinks,
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# slot select, switch_root). It only returns on failure — then fall through to
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# the diskless shell/poweroff behavior below.
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if [ -b /dev/vda ]; then
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. /etc/rc
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fi
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if grep -qw warden.shell /proc/cmdline; then
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echo "warden.shell: interactive shell (exit to power off)"
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setsid cttyhack sh
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fi
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poweroff -f
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