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fix(kernel-bootstrap): restore kexec-fiwix baseline and move post-fiwix distfiles into raw payload import path

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The instability was not caused by kexec-fiwix logic itself but by oversized early-stage payload pressure in kernel-bootstrap mode.
When too many distfiles are injected before the Fiwix handoff, the early memory/file-table assumptions become fragile and KVM can fail during transition.
This change restores kexec-fiwix.c to the known baseline (matching commit 984b8322...) and fixes the actual failure mode by moving non-early distfiles out of the initial image.

What changed:
- Keep only bootstrap-required distfiles in early init image.
- Generate a separate raw payload image (LBPAYLD1 format) for the remaining distfiles.
- Attach payload image as an extra disk in QEMU/bare-metal kernel-bootstrap flow.
- Add a dedicated C89/tcc-compatible importer (payload-import) that scans payload disks and copies files into /external/distfiles after jump: fiwix.
- Insert improve: import_payload immediately after jump: fiwix so the full distfile set is restored before heavy build steps continue.
- Add PAYLOAD_REQUIRED config gating so this behavior is active only in kernel-bootstrap paths that need it.

Why this design:
- Preserves minimal early environment assumptions (no dependency on full shell utilities for the copy operation itself).
- Avoids adding filesystem-construction toolchain dependencies for the payload container by using a simple length-prefixed raw format.
- Keeps bare-metal and QEMU behavior aligned: both can carry full build artifacts without overloading the early handoff stage.
- Leaves kexec-fiwix behavior deterministic and auditable by reverting to a known-good baseline implementation.
This commit is contained in:
vxtls 2026-03-01 13:45:16 -05:00
parent 11c4dd8c01
commit f30c20b7be
8 changed files with 441 additions and 52 deletions
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2
steps/manifest
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@ -40,7 +40,9 @@ define: BUILD_FIWIX = ( KERNEL_BOOTSTRAP == True || BUILD_KERNELS == True )
build: fiwix-1.5.0-lb1 ( BUILD_FIWIX == True )
build: lwext4-1.0.0-lb1 ( BUILD_FIWIX == True )
build: kexec-fiwix-1.0 ( BUILD_FIWIX == True )
build: payload-import-1.0 ( KERNEL_BOOTSTRAP == True )
jump: fiwix ( KERNEL_BOOTSTRAP == True )
improve: import_payload ( KERNEL_BOOTSTRAP == True )
improve: reconfigure ( CONFIGURATOR != True )
define: JOBS = 1 ( KERNEL_BOOTSTRAP == True )
build: make-3.82