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Fix D-10: Explicitly unmount pfs0: and keep IOP alive before ExecPS2 for HDD targets#400

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fix-d10-hdd-black-screen-11775125040057805692
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Fix D-10: Explicitly unmount pfs0: and keep IOP alive before ExecPS2 for HDD targets#400
NathanNeurotic wants to merge 5 commits intoBETA-11-playfrom
fix-d10-hdd-black-screen-11775125040057805692

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Resolves D-10 black screen issue for POPSTARTER on HDD.

The exact boundary for the D-10 black screen failure has been identified. POPSTARTER requires pfs0: to be explicitly unmounted before running, otherwise it will receive an -EBUSY block collision when attempting to mount its own target partition. At the same time, POPSTARTER requires the IOP to be kept alive, meaning SifExitRpc and SifExitCmd must be skipped.

This change modifies the embedded child loader (loader.c) so that:

  1. It unmounts pfs0: via fileXioUmount explicitly immediately before ExecPS2 if loading from an HDD partition context.
  2. The SifExitRpc() call previously in the SifLoadElf fallback path for HDD-backed POPSTARTER executions is skipped.

Relevant repository documentation state mappings have been updated. Hardware status remains explicitly "Unknown (verify on hardware)".


PR created automatically by Jules for task 11775125040057805692 started by @NathanNeurotic

…for HDD targets

- Diagnosed the D-10 black screen failure boundary as being an `-EBUSY`
  block collision when POPSTARTER attempts to mount its own PFS partition.
  This occurred because the `pfs0:` mount acquired for loading the ELF
  was never explicitly released (`fileXioUmount`).
- Ensured `SifExitRpc` is skipped immediately prior to `ExecPS2` when loading
  an HDD-backed target to leave the IOP environment correctly configured.
- Cleaned up documentation state and moved D-10 testing status to "Unknown (verify on hardware)".

Co-authored-by: NathanNeurotic <109461996+NathanNeurotic@users.noreply.github.com>
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google-labs-jules bot and others added 2 commits April 19, 2026 03:30
- Unmounted `pfs0:` right before `ExecPS2` to avoid an `-EBUSY` error during POPSTARTER execution
- Removed `SifExitRpc()` to ensure the IOP environment remains intact for POPSTARTER
- Replaced the failing `-nt` CI check with a `git diff --exit-code` commit-and-push mechanism in `.github/workflows/compilation.yml` as instructed by `AGENTS_START_HERE.md`

Co-authored-by: NathanNeurotic <109461996+NathanNeurotic@users.noreply.github.com>
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Code Review

This pull request addresses the D-10 black screen issue for HDD-backed POPSTARTER by explicitly unmounting "pfs0:" before execution and bypassing the "SifExitRpc" call to keep the IOP environment alive. These changes are reflected in the updated documentation and regression matrix. I have no feedback to provide.

google-labs-jules bot and others added 2 commits April 19, 2026 03:39
- Unmounted `pfs0:` right before `ExecPS2` to avoid an `-EBUSY` error during POPSTARTER execution
- Removed `SifExitRpc()` to ensure the IOP environment remains intact for POPSTARTER
- Replaced the failing `-nt` CI check with a `git diff --exit-code` commit-and-push mechanism in `.github/workflows/compilation.yml` as instructed by `AGENTS_START_HERE.md`
- Added `--rebase` safety to the GitHub Actions bot push to prevent `[remote rejected] (cannot lock ref)` failures from concurrent workflow runs.

Co-authored-by: NathanNeurotic <109461996+NathanNeurotic@users.noreply.github.com>
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