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scripts: reset LLEXT VMA accumulators before each west build #10793

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scripts: reset LLEXT VMA accumulators before each west build #10793

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16 changes: 16 additions & 0 deletions scripts/xtensa-build-zephyr.py
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Original file line number Diff line number Diff line change
Expand Up @@ -979,6 +979,22 @@ def build_platforms():
env=platf_build_environ, sof_log_env=True)
print()

# Delete the LLEXT VMA accumulator file before every build.
# llext_offset_calc.py uses module_size as a persistent counter
# across cmake custom-command invocations. If ninja is invoked
# more than once without a pristine rebuild this counter keeps
# accumulating, pushing pre-linked VMAs beyond the valid LLEXT
# virtual region and causing sys_mm_drv_map_region() to fail
# silently at runtime (IPC4_MOD_NOT_INITIALIZED error 104).
# llext_offset_calc.py already handles a missing file as size=0,
# so deletion is the simplest and most reliable reset.
zephyr_build_dir = pathlib.Path(abs_build_dir) / "zephyr"
if zephyr_build_dir.is_dir():
acc_path = zephyr_build_dir / "module_size"
if acc_path.is_file():
acc_path.unlink()
print(f"Deleted LLEXT VMA accumulator: {acc_path}")

# Build
try:
execute_command(build_cmd, cwd=west_top, env=platf_build_environ, sof_log_env=True)
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