Publish Chimera GFX source

2026-09-03 03:27:14 +02:00
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+# Phase 1.0M write-free defaults correction
+
+Status: **OFFLINE ARTIFACT AUDITED; DEVICE ACTION BLOCKED**.
+
+The consumed Phase-1.0K trace identified one blocked `MKDIR` before I04, and
+Phase 1.0L bound it to the built-in playlist directory creation in
+`config_set_defaults()`. Phase 1.0M makes only the corresponding offline source
+correction in the separate `chimera-retroarch` fork.
+
+For `CHIMERA_PS5_NO_FILESYSTEM_WRITES`, RetroArch now skips the directory
+existence probe and `path_mkdir()` at that source site. It still calculates
+`new_path` and all subsequent in-memory playlist paths. The write-diagnostic
+profile has `HAVE_CONFIGFILE=0`, so the separate legacy migration block is not
+compiled. All 17 `--wrap` write-firewall options remain in the link contract.
+
+## Static callgraph delta
+
+The exact old Phase-1.0J function contained:
+
+```text
+0x26845 -> path_is_directory
+0x26856 -> path_mkdir
+```
+
+In the exact Phase-1.0M ELF, `config_set_defaults` retains six calls to
+`fill_pathname_join_special` for this playlist block and contains no call to
+`path_is_directory` or `path_mkdir`. The generic `path_mkdir` symbol remains in
+the binary, but is no longer reachable from this defaults function. Link-time
+garbage collection retains the actually referenced `__wrap_open`,
+`__wrap_fopen` and `__wrap_fwrite`; each still enters the common fail-closed
+write blocker.
+
+## Reproducible artifact
+
+Two clean builds from RetroArch source commit
+`12cf1d783c41eb303987e49a5a920805a59ef7a4` produced identical outputs:
+
+| Evidence | Size | SHA-256 |
+|---|---:|---|
+| `retroarch_ps5_write_diag.elf` | 1,845,208 | `c99a0856309a357ad2667d89b4924e4063ad214cae09c8a419457b0732f583cd` |
+| linker map | 637,728 | `6768ffc7267b9b362c3b953571e5dfeed1e70004a3e19f41ef500c3f26272719` |
+| normalized disassembly | n/a | `141a620484784e5e01ec0cb2a51f77b67712bc484aae6de0f139ba1e28922c87` |
+
+The ELF remains ET_DYN, entry `0xff220`, with `R-X`, `R--` and `RW-` LOAD
+segments and no RWX LOAD segment. Init/fini arrays are empty, TLS is absent and
+BSS is 697,632 bytes. It has 142 undefined dynamic symbols, seven DT_NEEDED
+modules and 1,055 relocations (142 GLOB_DAT, 913 RELATIVE). `send` is the only
+network primitive; socket creation, connect, listener, receive and GNM imports
+are absent.
+
+The artifact, map and audit JSON remain ignored local evidence and are not
+committed. The SDK v0.41 CRT effects remain inherited under ADR-0010. Static
+acceptance by the hardened-loader model is not runtime proof.
+
+All current authorization fields are false. This new artifact is
+`execution_eligible=false`, `transfer_eligible=false` and
+`installation_eligible=false`. No PS5 connection, request, transfer, result
+reception, execution, device write, retry or reconnect occurred in Phase 1.0M.
+
+The Chimera GFX whole-tree secrets scan passed. The sibling RetroArch
+changed-file scan found zero matches; its whole-tree scan separately flags
+pre-existing upstream BearSSL/mbedTLS sample-key fixtures, so no whole-tree
+RetroArch PASS is claimed.