[kyon-eth]

What

Declare 18 additional callable libSceHmd2 exports as throwing placeholders, including seven older-only NIDs absent from the later module inventory. Their names, signatures and behavior are unverified. The original 11 NIDs appear under the same module and logical library in both version-labelled images, but are absent from the pinned public 3.20 catalogue. The seven additions cannot be cross-checked against the later inventory; the labels do not independently authenticate firmware provenance. No game unblock is claimed.

Tested

• Repository conventions and git diff --check pass.
• Compiled the existing and added source files for macOS x86_64 and inspected the patched test binary: the original 11 expected NIDs appear once and no baseline exports were removed; a subsequent standalone build verified all seven additional literal NID aliases.
• The overlap checker could not fully compare feat(libs): the Hmd2 reprojection session #7658, feat(libSceHmd2): answer five reprojection calls without a session as the console does #8645 and docs(debt): correct eight entries that no longer match the code #12104 because they already conflict with main. Their changed Hmd2 exports were checked separately and do not overlap these NIDs; merge previews introduced no additional conflict paths.
• Full library builds, console behavior, Linux and Windows were not tested.

Checklist

• Based on current main; no other open PR implements the same functions
• One topic per PR; follow-ups go in a new PR
• No comments in code except technical debt
• Unimplemented paths throw (NotImplemented_nid_no_patch); silent stubs are listed under Silent stubs in their library's technical debt file
• No notes, investigation .md files or images added to the repository (attach them to this PR)
• New third-party code is a submodule built from source
• Generic behaviour, not specific to one title
• Depends on: none
• Fixes: none
• Unblocks: none
• GPUs tested: n/a
• AI-assisted: yes

[github-actions]

Progress report (73ffb45 → 2bebdd3)

📉 System libraries: 26.51% (-0.02%, +18 declared functions)

🆕 18 declared as stubs

Library	Name
libSceHmd2	hmd2LegacyUnknown_Prx62Z9TC9M_nid_no_patch
libSceHmd2	hmd2LegacyUnknown_ZIkYdfc5p1o_nid_no_patch
libSceHmd2	hmd2LegacyUnknown_hvGZSIlA7lk_nid_no_patch
libSceHmd2	hmd2LegacyUnknown_mt1yhLrXOMk_nid_no_patch
libSceHmd2	hmd2LegacyUnknown_qug_minus_eu8URpA_nid_no_patch
libSceHmd2	hmd2LegacyUnknown_rmaZr_minus_K8c_plus_s_nid_no_patch
libSceHmd2	hmd2LegacyUnknown_y0VEHlxFQFs_nid_no_patch
libSceHmd2	libSceHmd2Unknown_7Qwh_plus_itD9r4_nid_no_patch
libSceHmd2	libSceHmd2Unknown_Ec6R1zHrEmA_nid_no_patch
libSceHmd2	libSceHmd2Unknown_FBUEhH9tQ1A_nid_no_patch
libSceHmd2	libSceHmd2Unknown_GLtAhJ6E2io_nid_no_patch
libSceHmd2	libSceHmd2Unknown_Ijl_plus_flgyR7Q_nid_no_patch
libSceHmd2	libSceHmd2Unknown_PcdNgERzCos_nid_no_patch
libSceHmd2	libSceHmd2Unknown_UbHtTtGRplE_nid_no_patch
libSceHmd2	libSceHmd2Unknown_dvGkONYMdJg_nid_no_patch
libSceHmd2	libSceHmd2Unknown_fY41qRGCvTM_nid_no_patch
libSceHmd2	libSceHmd2Unknown_n9wYmNVt6S4_nid_no_patch
libSceHmd2	libSceHmd2Unknown_wDDAIxOeaqg_nid_no_patch

Changed libraries (implemented exports)

Library	Before	After	Change
libSceHmd2	16/134 (11.94%)	16/152 (10.53%)	-1.41%

[github-actions]

Some comparisons could not be completed because a pull request conflicts with the base branch. Review these shared files manually before concluding that there is no overlap.

Pull request	Shared files not compared
PR 7658	core/libs/prx/libSceHmd2/Export.cpp docs/dev/debt/libSceHmd2.md
PR 8645	core/libs/prx/libSceHmd2/Export.cpp docs/dev/debt/libSceHmd2.md

[adriadam10]

Checked that the 18 NIDs are unique on main, every export throws through NotImplemented_nid_no_patch, the debt table and entry match, conventions and Windows CI are green; merged.