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lunixbochs / patchkit

binary patching from Python
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linker only has symbols for CGC environment #7

Open lunixbochs opened 8 years ago

lunixbochs commented 8 years ago

Add arch/OS support in linker and integrate lib43.

bet4it commented 6 years ago

I have migrated patchkit from CGC to i386/x86_64 in my repository(https://github.com/bet4it/patchkit) and integrated my fork of lib43(https://github.com/bet4it/lib43) as the library. Now i386/x86_64 syscalls works well and most functions of lib43 can be used. But it can't handle with global/static variables and functions in lib43/io.c seems can't flush the buffer correctly which affects functions like printf and put. We still need some changes in it.

lunixbochs commented 6 years ago

This is cool. Have you looked at the compiler's output assembly to see why static isn't working? I'd rather fix static/globals than inline everything.

bet4it commented 6 years ago

For example, global variables don't belong to specific function, so we should handle them like what we have done with functions. We should find all of them, declare them, and substitute their names with addresses in linker's post procedure.

If the binary enables PIE, the references to global/static variables won't be redirected, which will cause errors.