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be1f9e75f0
* Patch .mdebug for data_with_rodata objects * Read static symbols from .mdebug in sym_info.py * Add ability to print all symbols * Add license * Fix bug when missing .mdebug section * /patch_data_with_rodata_mdebug.py license + nitpicks
67 lines
1.6 KiB
Python
Executable file
67 lines
1.6 KiB
Python
Executable file
#!/usr/bin/env python3
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# SPDX-FileCopyrightText: © 2025 ZeldaRET
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# SPDX-License-Identifier: CC0-1.0
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import argparse
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import struct
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import elftools.elf.elffile
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# Patches mdebug for files linked with data_with_rodata.ld by replacing storage
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# class stData with stRData, since .data symbols are now in the .rodata section
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SC_MASK = 0x03E00000
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SC_SHIFT = 21
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def read_u32(f, offset):
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f.seek(offset)
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return struct.unpack(">I", f.read(4))[0]
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def write_u32(f, offset, value):
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f.seek(offset)
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f.write(struct.pack(">I", value))
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def patch_sc(f, offset):
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value = read_u32(f, offset)
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sc = (value & SC_MASK) >> SC_SHIFT
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if sc == 2: # scData
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value = (value & ~SC_MASK) | (15 << SC_SHIFT) # scRData
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write_u32(f, offset, value)
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument("file", help="input file")
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args = parser.parse_args()
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with open(args.file, "r+b") as f:
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elf = elftools.elf.elffile.ELFFile(f)
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mdebug_offset = 0
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for section in elf.iter_sections():
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if section.name == ".mdebug":
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mdebug_offset = section["sh_offset"]
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break
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if mdebug_offset == 0:
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return
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isymMax = read_u32(f, mdebug_offset + 0x20)
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cbSymOffset = read_u32(f, mdebug_offset + 0x24)
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iextMax = read_u32(f, mdebug_offset + 0x58)
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cbExtOffset = read_u32(f, mdebug_offset + 0x5C)
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for i in range(isymMax):
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patch_sc(f, cbSymOffset + i * 0xC + 0x8)
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for i in range(iextMax):
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patch_sc(f, cbExtOffset + i * 0x10 + 0xC)
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if __name__ == "__main__":
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main()
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