Cesarus85--mjolnir-vr/docs/object_matching_logs/libcmt_cmiscdat_obj.md

libs/libcmt/cmiscdat.obj exact-match ledger

This is an atomic, data-only reconstruction from campaign commit eb1e45b0. Before selection, the lane screened the canonical configuration, parked ledger, all local refs and worktrees, object logs, and active agent ownership. The unit was genuinely unstarted, absent from the parked ledger, and owned by this lane.

Plain-English behavior

The object owns the CRT floating-conversion dispatch table. It has six slots, and this build initializes every slot to _fptrap. In plain English, any use of one of these unconfigured conversion hooks deliberately reaches the CRT's floating-point trap routine.

Provenance and January inventory

This layout was not synthesized from likely names. The exact XDK 3911 archive member obj\\i386\\cmiscdat.obj was extracted from xbox/lib/libcmt.lib with the XDK 7.00.9290 librarian. Its runtime .data section is strict-equal to the January split object:

• one externally linked table symbol, __cfltcvt_tab, at offset zero;
• 24 bytes of initialized writable .data;
• six four-byte IMAGE_REL_I386_DIR32 entries at offsets 0, 4, 8, 12, 16, 20;
• every relocation resolves to external function __fptrap + 0;
• no executable code or other runtime-owned section.

The extracted archive member's compiler/debug/build-number sections are metadata and are not source-owned runtime state. The reconstructed object must reproduce the table's bytes, relocations, external symbol class/type, and data section flags.

Experiment record

ID	Readable C shape	Result
E01	Typed six-element function-pointer table, each entry _fptrap	Candidate under fresh validation

No alternate shape is justified unless E01 fails a measured target property.

Strict verification

XDK 3911 CL.Exe 13.00.9254.1 rebuilt the candidate with the generated /O1 /Gy /I"xbox/include" flags. The January target, candidate, and extracted XDK archive member all have:

• data size 24/24/24;
• six relocations at the same offsets, all IMAGE_REL_I386_DIR32 to __fptrap + 0;
• normalized SHA-256 9d908ecfb6b256def8b49a7c504e6c889c4b0e41fe6ce3e01863dd7b61a20aa0;
• external __cfltcvt_tab at offset zero with data type and storage class 2;
• initialized writable .data flags 0xC0300040;
• no other runtime-owned section.

section_infos_equal is true for target versus candidate, target versus the XDK member, and candidate versus the XDK member. The candidate's section number differs only because ordinary compiler metadata precedes .data; ownership is compared by section content, flags, symbol offset/class, and relocation identity rather than an incidental COFF ordinal.

Current-campaign gates passed:

• full halobetacache_build and libcmt_build;
• semantic_progress with zero unit errors;
• progress, reporting libs/libcmt/cmiscdat complete with all 24 data bytes;
• semantic audit with zero unit errors;
• admission audit with no cmiscdat contradiction, revocation, or unreviewed candidate (the sole shell_xbox contradiction is pre-existing and unrelated);
• 179/179 tool unit tests.

The required clean-commit regression snapshot/check is run after this ledger is committed. No historical candidate object is used as proof.

House/Berth, readability, and bug audit

The table has a named function-pointer type and a normal C initializer. The no-argument callback prototype uses explicit (void). There are no magic structure offsets, tag/datum/object accesses, or speculative types. The value six is the January- and XDK-proven table width documented above.

No assembly, volatile, forced inlining, undefined behavior, byte patch, alignment directive, optimization pragma, comparator exception, or codegen-only cast is used. No original January bug was found, so no bug-preservation comment is needed.