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Joseph MattielloandClaude Sonnet 5.5
e4426f6b61
m68kdasm.c from kstenerud/Musashi 313ebf1b (MIT) byte-for-byte, a minimal m68k.h stand-in (renames the exported symbols vj_dasm_*: the core defines m68k_read_disassembler_* and m68k_is_valid_instruction itself), and a wrapper that disassembles from a caller-supplied byte buffer so it never reads emulated memory or a core global. App only; not part of the C89 core build. Refs #652 Refs #833 Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Musashi 68000 disassembler (vendored)
m68kdasm.c is the disassembler from Musashi by Karl Stenerud (MIT license, see
LICENSE). It is used only by the standalone app's CPU debugger (app/src/debug/cpu_view.cpp); it is compiled as C by
the app's CMake and is not part of the C89 libretro core build.
| upstream | https://github.com/kstenerud/Musashi |
| commit | 313ebf1bd9f4d0d93341eb5ce21fd8a119e9dbdd (master, 2026-03-08) |
| file | m68kdasm.c, byte-for-byte unmodified (its header says "Version 3.32"; upstream's readme says 4.10) |
| license | MIT; the permission notice is also at the top of m68kdasm.c and in LICENSE |
Files here that are ours, not upstream's:
m68k.h-- a minimal stand-in for Musashi'sm68k.h. The real one declares the entire 68000 emulator (m68k_get_reg,m68k_register_t, the memory callbacks...) which would collide with the core'ssrc/m68000/m68kinterface.h. The disassembler needs only the CPU-type enum,M68K_ARRAY_LENGTHand the threem68k_read_disassembler_*hooks. It renames every exported symbol tovj_dasm_*with#defines: the core itself definesm68k_read_disassembler_*(they read emulated memory) andm68k_is_valid_instruction, and both link into the app. It also definesM68K_COMPILE_FOR_MAMEas off:m68kdasm.ctestsM68K_COMPILE_FOR_MAME == M68K_OPT_ON, which is true when both macros are undefined.vj_m68kdasm.{h,c}-- the wrapper. It callsm68k_disassemble_raw()on a byte buffer the caller filled withvj_debug_iface::peek, so the disassembler never reads emulated memory and never touches a core global. The threem68k_read_disassembler_*hooks are stubs (only the non-raw path uses them).
To update: copy a newer m68kdasm.c over the old one, update the commit above, rebuild, run debug_cpu_unit.