Load binaries with a custom function ordering

I have compiled a binary with relocation flag enabled ld --emit-relocs. Now I want to load the binary with a specific function ordering. I mean I want to give the function order as argument to CLE and CLE should load the binary in that order. Does CLE support this functionality? If doesn’t can you give me some pointers which source files should I look up first to implement this feature for X86_64 ELF binaries.

[rhelmot]

I don’t understand this quesiton. What does it mean for a binary to have its functions in a certain order? Do you mean CLE re-linking the binary with the functions arranged in that order in the address space? From what I can tell that’s the point of the --emit-relocs function, but I don’t understand what the use case for this would be.

The most serious roadblock to this would be that CLE absolutely does not have the relocations implemented to do anything other than the stuff that usually shows up in dynamically linked executables. You’ll have to implement all the code relocations yourself (cle/backends/elf/relocation). Then you’ll probably want to build a custom backend which subclasses backends.ELF and after super-init returns, chops up and reorders the text section. I don’t know if the relocations from --emit-relocs will be automatically processed by CLE’s linking step, so if they aren’t you’ll need to inject those somehow as well.

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