50 lines
2 KiB
Python
50 lines
2 KiB
Python
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import json
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with open(r'k:\ghidra\Crusader_Decomp\ne_reloc_fixups.json') as f:
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fixups = json.load(f)
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known_callf_addrs = {
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'0007:101c': 'entity_ai_update_loop call#1 (entity_slot_fetch)',
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'0007:1093': 'entity_ai_update_loop call#2 (entity_tick_dispatch)',
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'0007:2261': 'snap_entity_to_ground call (ground snap thunk)',
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'0007:27dc': 'anim_frame_update call#1 (completion_callback)',
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'0007:281e': 'anim_frame_update call#3 (notify_frame_progress)',
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'0007:2851': 'anim_frame_update call#4 (entity_sprite_advance)',
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'0007:8666': 'entity_sync_tile_aux thunk (tile_type_notify)',
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}
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def ghidra_to_file(addr_str):
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seg, off = addr_str.split(':')
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return (int(seg, 16) << 16) + int(off, 16)
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# Build a lookup dict by source_file_offset for speed
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by_offset = {}
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for f in fixups:
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by_offset[f['source_file_offset']] = f
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for addr, desc in sorted(known_callf_addrs.items()):
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callf_file = ghidra_to_file(addr)
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print(f"\n{addr} = {desc}")
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print(f" CALLF file offset: 0x{callf_file:X}")
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# The NE fixup offset points to where the patched value goes.
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# For CALLF (9A xx xx xx xx), the operand is at addr+1.
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# But the reloc chain offset is relative to segment start.
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# Let's search for any fixup within +/-2 of both callf_file and callf_file+1
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for delta in range(0, 5):
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test_off = callf_file + delta
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if test_off in by_offset:
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m = by_offset[test_off]
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tgt = m.get('target', '?')
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tgt_g = m.get('target_ghidra', '?')
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print(f" FOUND at +{delta}: file=0x{test_off:X} seg{m['source_seg']:03d}+0x{m['source_offset_in_seg']:04X}")
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print(f" -> {tgt} (ghidra: {tgt_g})")
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break
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else:
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print(f" NOT FOUND in range [+0..+4]")
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# Show what segment this falls in
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for s in range(1, 146):
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entry = [x for x in fixups if x['source_seg'] == s]
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if entry:
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# not efficient but ok for debugging
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pass
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