yu1745andClaude Opus 5.5
62dbc6ded9
Fcitx 5 integration for the WeType Android ARM64 input engine, running through QEMU user mode. The AppImage ships only this project's code plus redistributable runtime pieces; the official WeType APK is downloaded from Tencent at install time, verified, and patched locally. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
85 lines
3.4 KiB
Python
85 lines
3.4 KiB
Python
#!/usr/bin/env python3
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"""ELF surgery for WeType arm64 libs → glibc/qemu-aarch64.
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glibc 2.39 dl-version.c 铁律（源码实测）：
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- l_versions 仅当 ndx_high>0（存在 VERNEED 或 VERDEF）才分配；
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- VERNEED 在 → match_symbol 校验 "LIBC" 版本（bionic 版本名 glibc 没有）→ 报错；
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- VERNEED 删掉后：
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* 无 VERDEF 的库：ndx_high=0 → l_versions=NULL、l_versyms=NULL，
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但 DT_VERSYM tag 还在 → dl-reloc 读 l_versyms[symidx] → 空指针崩。
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⇒ 必须连 DT_VERSYM tag 一起删（此后所有符号查找走无版本路径）。
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* 有 VERDEF 的库（tflite）：ndx_high>0 → 走分配分支时
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map->l_versyms = D_PTR(map, l_info[VERSYM])，若 VERSYM tag 已删则
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对 NULL 动态项解引用（Elf64_Dyn.d_un 恰在 +8）→ 崩。
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⇒ 必须保留 DT_VERSYM，并把 .gnu.version 条目全写 0：
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l_versions[0] 恒为 calloc 零槽（hash=0）→ 查找自动降级为无版本。
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"""
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import struct, sys, os
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DT_VERNEED = 0x6ffffffe
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DT_VERSYM = 0x6ffffff0
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DT_VERDEF = 0x6ffffffd
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def patch(path: str) -> str:
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b = bytearray(open(path, 'rb').read())
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e_phoff, = struct.unpack_from('<Q', b, 0x20)
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e_phentsize, e_phnum = struct.unpack_from('<HH', b, 0x36)
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dyn_off = dyn_sz = None
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for i in range(e_phnum):
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ph = e_phoff + i * e_phentsize
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if struct.unpack_from('<I', b, ph)[0] == 2:
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dyn_off = struct.unpack_from('<Q', b, ph + 8)[0]
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dyn_sz = struct.unpack_from('<Q', b, ph + 32)[0]
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break
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if dyn_off is None:
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return f"{os.path.basename(path)}: no PT_DYNAMIC, skip"
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has_verdef = has_versym = False
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i = dyn_off
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while i < dyn_off + dyn_sz:
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tag, _ = struct.unpack_from('<QQ', b, i)
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if tag == 0:
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break
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if tag == DT_VERNEED:
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struct.pack_into('<QQ', b, i, 0x6ffffff9, 0) # 伪装 RELACOUNT:0
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elif tag == DT_VERDEF:
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has_verdef = True
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elif tag == DT_VERSYM:
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has_versym = True
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i += 16
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n = 0
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if has_verdef and has_versym:
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# 保留 VERSYM，条目全写 0（l_versions[0] 必为空名 → 无版本查找）
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e_shoff, = struct.unpack_from('<Q', b, 0x28)
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e_shentsize, e_shnum, e_shstrndx = struct.unpack_from('<HHH', b, 0x3a)
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shs = [struct.unpack_from('<IIQQQQIIQQ', b, e_shoff + j * e_shentsize)
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for j in range(e_shnum)]
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shstr = shs[e_shstrndx]
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strtab = b[shstr[4]:shstr[4] + shstr[5]]
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for s in shs:
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if bytes(strtab[s[0]:]).split(b'\0')[0] == b'.gnu.version':
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for j in range(s[4], s[4] + s[5], 2):
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struct.pack_into('<H', b, j, 0)
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n += 1
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elif has_versym:
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# 无 VERDEF：VERNEED 删掉后 ndx_high=0，l_versions/l_versyms 都不会分配，
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# VERSYM tag 留着必崩 → 一并删除（再次扫描：VERNEED 槽位已是 RELACOUNT）
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i = dyn_off
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while i < dyn_off + dyn_sz:
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tag, _ = struct.unpack_from('<QQ', b, i)
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if tag == 0:
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break
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if tag == DT_VERSYM:
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struct.pack_into('<QQ', b, i, 0x6ffffff9, 0)
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break
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i += 16
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open(path, 'wb').write(b)
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return (f"{os.path.basename(path)}: VERNEED removed, "
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f"VERSYM {'kept, %d entries→0' % n if has_verdef else 'removed (无 VERDEF)'}")
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if __name__ == '__main__':
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for p in sys.argv[1:]:
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print(patch(p))
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