Is there an API for Apply patched bytes to input file?

IDA General
1

Hi,

The title says it all. Is there an API call to save the patched bytes into the inputfile.
There is a menu entry but is the actual call exposed?

Avi.

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2

I haven’t found any way to do it directly but you can call idc.gen_file() to generate a DIF file that is the difference and then use a thirdparty program to actually make the modifications. I have written a replacement for idc.gen_file on Github: community_base.py

3

Perhaps patching/plugins/patching/util/ida.py at f7902033f9c2be9ea71017ce9eb13691906cc858 · gaasedelen/patching · GitHub could help you.

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4

Not directly, but you have half the problem solved with this API:

idaman int ida_export visit_patched_bytes(
        ea_t ea1,
        ea_t ea2,
        int (idaapi *cb)(ea_t ea, qoff64_t fpos, uint64 o, uint64 v, void *ud),
        void *ud = nullptr);

All you have to do is just open a file prior to calling this API, then in the callback, patch the values in; ofc, finally close the file.

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5

I sat down and wrote such function.

See file_write_patches_to_file at: community_base/community_base.py at 26137c80ddf20449a09ab7246f8c72c98d42d9e3 · Harding-Stardust/community_base · GitHub

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6

That looks good! thanks for sharing!

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