2 Commits

Author	SHA1	Message	Date
Matthew Stanley	8e81afd111	fix: conditional branch fall-through + Tier 1 reverse debugger ... Recompiler bug fix: full_function_emitter treated conditional branch delay slots at function boundaries as fully resolved control flow, suppressing the fall-through tail call for the "not taken" path. This broke 15 cross-function fall-throughs across the BIOS, most critically the find-free-EvCB-slot function (BFC11800) whose search loop was silently skipped — causing OpenEvent to return garbage handles (0xF100E1E8) instead of valid slot indices (0xF1000000..0xF1000005). Fix: only suppress fall-through for unconditional flow (j/jr/jal/jalr/rfe). Conditional branches (beq/bne/blez/bgtz/bltz/bgez) now always emit `cpu->pc = next_addr; return;` for the not-taken path. Also included: - Tier 1 reverse debugger: 1M-entry write trace ring (32 MB), 64K-entry MMIO trace ring (2 MB), 8-slot multi-range address filtering, function attribution via g_debug_current_func_addr. 6 new TCP commands: wtrace_add/del/ranges/stats, mmio_dump/clear. - 3 new dispatch seeds for functions exposed by fall-through fix (SIO epilogue, exception chain walker, GTE init). - Diagnostic tools: analyze_sio_trace, decode_insn, decode_jt, mmio_tally. - Pattern 5 trampoline fix + PLAN.md Phase 4 status update. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-04-21 14:23:09 -07:00
Matthew Stanley	7c40d33db3	Phase 1 complete: recompiler proven correct on SCPH1001.BIN ... Phase 1a (boot slice): 30 instructions at 0xBFC00000, compiles clean. Phase 1b (instruction coverage): 54 opcodes implemented in strict_translator, 44,629 walker-reachable instructions covered, 0 missing. Phase 1c (function discovery): 76 functions from 2 seeds, 2,988 instructions, 199 call edges, 27 indirect jumps. All validated through StrictTranslator. Phase 1d (indirect control flow): 27 sites classified — 21 A0/B0/C0 dispatch stubs, 4 computed calls, 2 computed tail calls. Ghidra cross-referenced with 0 disagreements. Phase 1e (relocation): ROM-to-RAM copy at FUN_bfc00420 proven with both Ghidra (static) and DuckStation (runtime). 69 address aliases, 68/69 function entries match byte-for-byte in RAM. Normalization rule documented. Includes PRINCIPLES.md and DEBUG.md adapted from recomp-template. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-04-11 21:26:04 -07:00