[lldb-dev] Linux ELF header e_ident[EI_OSABI] value

[Howard Hellyer via lldb-dev]

> I would change it so that the "os" doesn't get set to anything when 
> it detects this in the core file. When an OS is not specified, the 
> llvm::Triple will return OSUnknown as the enumeration value for the 
> OS _and_ the llvm::StringRef value will return an empty string. This
> is known in LLDB term as a "unspecified unknown". This means the 
> triple will be "x86_64-*-<vendor>". An unspecified unknown is a 
> wildcard. Any plugins that are trying to load a core file should 
> watch for this and use it accordingly.
> 
> So the answer is not "treat ELF files with ELFOSABI_NONE set as 
> Linux", but "treat ELF files with ELFOSABI_NONE set as *". Please 
> submit a patch that implements this when you get the chance. Let me 
> know if you have any questions.

I think that's the current behaviour in ArchSpec.cpp. Setting it 
deliberately to UnknownOS prevents the code later on from refining it any 
further from the notes section of the core file. (Unless you meant 
somewhere else in which case I'll take a look.)


Howard Hellyer
IBM Runtime Technologies, IBM Systems






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