scripts: reset LLEXT VMA accumulators before each west build#10793
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lgirdwood wants to merge 1 commit into
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scripts: reset LLEXT VMA accumulators before each west build#10793lgirdwood wants to merge 1 commit into
lgirdwood wants to merge 1 commit into
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llext_link_helper.py uses openmod_module_size and module_size as persistent counters to assign pre-linked VMAs to LLEXT ELFs. Running ninja more than once without a pristine build causes these files to accumulate across invocations. The second run doubles the counter values, placing all ELF VMAs outside the valid LLEXT virtual region [CONFIG_LIBRARY_BASE_ADDRESS, +CONFIG_LIBRARY_REGION_SIZE). When pre_located=true the LLEXT loader uses the ELF sh_addr VMAs directly as physical load addresses. sys_mm_drv_map_region() silently fails for out-of-range addresses, so the module is never registered. The kernel then receives IPC4_MOD_NOT_INITIALIZED (error 104) for every module init IPC. Reset both accumulator files to 0 before every west build invocation so VMA assignment always starts from CONFIG_LIBRARY_BASE_ADDRESS. Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
lgirdwood
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dbaluta,
kv2019i,
lbetlej,
mmaka1 and
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Pull request overview
Note
Copilot was unable to run its full agentic suite in this review.
This PR prevents incorrect pre-linked LLEXT VMAs on incremental rebuilds by resetting the on-disk accumulator counters before each west build, ensuring VMA assignment restarts from CONFIG_LIBRARY_BASE_ADDRESS.
Changes:
- Reset
openmod_module_sizeandmodule_sizeaccumulator files to0before invoking the build command. - Add inline documentation explaining the runtime failure mode prevented by the reset.
Comment on lines
+990
to
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| for acc_file in ("openmod_module_size", "module_size"): | ||
| acc_path = zephyr_build_dir / acc_file | ||
| if acc_path.is_file(): |
| for acc_file in ("openmod_module_size", "module_size"): | ||
| acc_path = zephyr_build_dir / acc_file | ||
| if acc_path.is_file(): | ||
| acc_path.write_text("0\n") |
kv2019i
approved these changes
May 20, 2026
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llext_link_helper.py uses openmod_module_size and module_size as persistent counters to assign pre-linked VMAs to LLEXT ELFs. Running ninja more than once without a pristine build causes these files to accumulate across invocations. The second run doubles the counter values, placing all ELF VMAs outside the valid LLEXT virtual region [CONFIG_LIBRARY_BASE_ADDRESS, +CONFIG_LIBRARY_REGION_SIZE).
When pre_located=true the LLEXT loader uses the ELF sh_addr VMAs directly as physical load addresses. sys_mm_drv_map_region() silently fails for out-of-range addresses, so the module is never registered. The kernel then receives IPC4_MOD_NOT_INITIALIZED (error 104) for every module init IPC.
Reset both accumulator files to 0 before every west build invocation so VMA assignment always starts from CONFIG_LIBRARY_BASE_ADDRESS.