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
138 lines
5.8 KiB
Bash
Executable File
138 lines
5.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Hermetic-ish kernel build for the WardenOS 86-Panel (RV1106).
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#
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# fetch pristine linux-6.18.46 -> apply patches/ in order -> configure with
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# build/warden_defconfig -> build zImage + rv1106-warden.dtb.
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#
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# The pristine tree is the ONLY external input; the delta is patches/. A build
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# from a clean checkout + a verified tarball is reproducible.
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#
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# Env:
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# KERNEL_TARBALL path to a local linux-6.18.46.tar.xz (skips the download)
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# SDK_TC dir holding the arm-rockchip830 uclibc cross toolchain bin/
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# WORK build scratch dir (default: a mktemp under $TMPDIR)
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# JOBS parallel make jobs (default: nproc)
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# WARDEN_KCONFIG_FRAGMENT
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# optional kconfig fragment merged onto warden_defconfig
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# (qemu/configs/virt.fragment builds the QEMU -M virt variant)
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#
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# Requires: `python` (not python3) on PATH — the SDK quirk; the CI runner provides
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# a project-local venv. Builds are SERIAL on the shared SDK box — never run two.
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set -euo pipefail
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KVER=6.18.46
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HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" # build/
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REPO="$(cd "$HERE/.." && pwd)"
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PATCHES="$REPO/patches"
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SHA_FILE="$HERE/linux-$KVER.tar.xz.sha256"
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JOBS="${JOBS:-$(nproc)}"
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URL="https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-$KVER.tar.xz"
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# A caller-provided WORK (e.g. CI's ${{ github.workspace }}/kbuild-out, from which
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# artifacts are uploaded) is left intact; a scratch dir we mktemp'd here is our own
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# (>1GB of extracted source + build output) and is removed on exit so repeated runs
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# on the shared SDK box don't fill the disk.
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if [ -n "${WORK:-}" ]; then
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WORK_OWNED=0
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else
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WORK="$(mktemp -d "${TMPDIR:-/tmp}/warden-kbuild.XXXXXX")"
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WORK_OWNED=1
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fi
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trap '[ "${WORK_OWNED:-0}" = 1 ] && rm -rf "$WORK"' EXIT
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log() { printf '\033[36m== %s\033[0m\n' "$*"; }
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command -v python >/dev/null || { echo "need 'python' (not python3) on PATH — SDK quirk" >&2; exit 1; }
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# 1. obtain + verify the pristine tarball
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mkdir -p "$WORK"
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TB="${KERNEL_TARBALL:-$WORK/linux-$KVER.tar.xz}"
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if [ ! -f "$TB" ]; then
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log "downloading $URL"
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curl -fSL "$URL" -o "$TB"
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fi
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# Fail closed: a missing pin (e.g. forgotten on a KVER bump) or a KERNEL_TARBALL
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# pointed at an arbitrary file must refuse to build, never silently skip the check
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# — the pristine tarball is the ONLY external input and integrity is the whole point.
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[ -f "$SHA_FILE" ] || {
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echo "FATAL: no pinned sha256 for linux-$KVER (expected $SHA_FILE) — refusing to build from an unverified tarball" >&2
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exit 1
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}
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want="$(cat "$SHA_FILE")"
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got="$(sha256sum "$TB" | awk '{print $1}')"
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[ "$want" = "$got" ] || { echo "tarball sha256 mismatch: want $want got $got" >&2; exit 1; }
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log "tarball sha256 verified"
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# 2. extract pristine
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SRC="$WORK/linux-$KVER"
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rm -rf "$SRC"
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log "extracting pristine"
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tar -C "$WORK" -xf "$TB"
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# 3. apply the patch series in order (fail loudly — never echo a lie)
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log "applying patch series"
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for p in "$PATCHES"/*.patch; do
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if git -C "$SRC" apply --whitespace=nowarn "$p" 2>/dev/null; then
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:
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elif patch -d "$SRC" -p1 --forward --no-backup-if-mismatch < "$p" >/dev/null 2>&1; then
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:
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else
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echo "FATAL: failed to apply $(basename "$p")" >&2
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exit 1
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fi
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echo " applied $(basename "$p")"
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done
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# Guard against a SILENT no-op: `git apply` run from inside another git repo's
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# subdirectory ignores out-of-subdir paths and exits 0 without applying anything
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# (issue #1). $WORK must therefore live OUTSIDE any git checkout. Assert that a known
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# product of the series actually landed on disk, so this can never masquerade as
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# success again.
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SENTINEL="$SRC/arch/arm/boot/dts/rockchip/rv1106-warden.dts"
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[ -f "$SENTINEL" ] || {
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echo "FATAL: patch series did not apply (missing $SENTINEL)." >&2
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echo " Is \$WORK inside a git repo? git apply silently ignores out-of-subdir" >&2
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echo " paths there — point WORK at a dir outside any checkout (e.g. \$RUNNER_TEMP)." >&2
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exit 1
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}
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log "patch series applied ($(basename "$SENTINEL") present)"
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# 4. configure
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log "configuring (warden_defconfig)"
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cp "$HERE/warden_defconfig" "$SRC/.config"
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# Optional kconfig fragment overlay (e.g. qemu/configs/virt.fragment for the
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# QEMU -M virt device-sim variant). Fail closed if set but unreadable — never
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# silently build the wrong kernel. Unset => the canonical RV1106 build,
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# byte-identical to a build without this hook.
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if [ -n "${WARDEN_KCONFIG_FRAGMENT:-}" ]; then
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[ -f "$WARDEN_KCONFIG_FRAGMENT" ] || {
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echo "FATAL: WARDEN_KCONFIG_FRAGMENT set but not a file: $WARDEN_KCONFIG_FRAGMENT" >&2
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exit 1
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}
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FRAG="$(cd "$(dirname "$WARDEN_KCONFIG_FRAGMENT")" && pwd)/$(basename "$WARDEN_KCONFIG_FRAGMENT")"
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log "merging kconfig fragment $(basename "$FRAG")"
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( cd "$SRC" && ARCH=arm ./scripts/kconfig/merge_config.sh -m .config "$FRAG" )
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fi
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# CROSS_COMPILE defaults to the Luckfox SDK uclibc prefix (set SDK_TC to its bin/),
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# but the kernel is freestanding, so a caller may override with a generic arm cross
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# toolchain instead — e.g. CROSS_COMPILE=arm-linux-gnueabihf- (in Debian's
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# gcc-arm-linux-gnueabihf), which the CI runner already has on PATH.
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export ARCH=arm
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export CROSS_COMPILE="${CROSS_COMPILE:-arm-rockchip830-linux-uclibcgnueabihf-}"
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if [ -n "${SDK_TC:-}" ]; then export PATH="$SDK_TC:$PATH"; fi
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command -v "${CROSS_COMPILE}gcc" >/dev/null \
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|| { echo "cross toolchain ${CROSS_COMPILE}gcc not on PATH (set SDK_TC, or CROSS_COMPILE to one that is)" >&2; exit 1; }
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make -C "$SRC" ARCH=arm CROSS_COMPILE="$CROSS_COMPILE" olddefconfig >/dev/null
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# 5. build zImage + the board dtb
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log "building zImage + rv1106-warden.dtb (-j$JOBS)"
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make -C "$SRC" ARCH=arm CROSS_COMPILE="$CROSS_COMPILE" -j"$JOBS" \
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zImage rockchip/rv1106-warden.dtb
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Z="$SRC/arch/arm/boot/zImage"
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D="$SRC/arch/arm/boot/dts/rockchip/rv1106-warden.dtb"
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log "build OK"
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ls -la "$Z" "$D"
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echo "zImage: $Z"
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echo "dtb: $D"
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