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De-compress (upx -d) for ELF pageholes

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modified:   p_lx_elf.cpp
This commit is contained in:
John Reiser 2020-05-30 13:54:11 -07:00 committed by Markus F.X.J. Oberhumer
parent 2f453acf5d
commit 963392a5ae
1 changed files with 14 additions and 2 deletions
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16
src/p_lx_elf.cpp
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@ -4656,7 +4656,13 @@ void PackLinuxElf64::unpack(OutputFile *fo)
break;
}
}
if (is_shlib
if (0x1000==get_te64(&phdri[0].p_filesz) // detect C_BASE style
&& 0==get_te64(&phdri[1].p_offset)
&& 0==get_te64(&phdri[0].p_offset)
&& get_te64(&phdri[1].p_filesz) == get_te64(&phdri[1].p_memsz)) {
fi->seek(up4(get_te64(&phdr[1].p_memsz)), SEEK_SET); // past the loader
}
else if (is_shlib
|| ((unsigned)(get_te64(&ehdri.e_entry) - load_va) + up4(lsize) +
ph.getPackHeaderSize() + sizeof(overlay_offset))
< up4(file_size)) {
@ -5708,7 +5714,13 @@ void PackLinuxElf32::unpack(OutputFile *fo)
break;
}
}
if (is_shlib
if (0x1000==get_te32(&phdri[0].p_filesz) // detect C_BASE style
&& 0==get_te32(&phdri[1].p_offset)
&& 0==get_te32(&phdri[0].p_offset)
&& get_te32(&phdri[1].p_filesz) == get_te32(&phdri[1].p_memsz)) {
fi->seek(up4(get_te32(&phdr[1].p_memsz)), SEEK_SET); // past the loader
}
else if (is_shlib
|| ((unsigned)(get_te32(&ehdri.e_entry) - load_va) + up4(lsize) +
ph.getPackHeaderSize() + sizeof(overlay_offset))
< up4(file_size)) {