Parsing RISC-V assembly

Re:Parsing RISC-V assembly by thethirdone on Monday October 26, 2020 @05:24PM (#24901629)

This works for the basics of RISC-V assembly, but fails for a lot of assembly code that GCC accepts. It should be fine for most human written code, but machine generated code is also common.

Most notably, labels starting with a period are not accepted, but gcc generated assembly has tons of labels like that.

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Re:Parsing RISC-V assembly by azhenley on Monday October 26, 2020 @05:40PM (#24901793)

Thanks! That should be an easy fix. The documentation is terrible.

What else did I miss?

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Re:Parsing RISC-V assembly by thethirdone on Monday October 26, 2020 @05:43PM (#24901838)

> Unfortunately, the documentation on legal syntax is absolutely terrible.

I totally agree. Determining the semantics of wierd assembly is even harder. At least for syntax you can just see confirm if gnu-as accepts it.

> Did I miss anything else?

I haven't looked into what is actually parsing at all, but it correctly accepts things like %hi, strings delimited by quotes, @function, labels that are just numbers. I had expected some of those to be rejects based on the post.

I don't know what else might fail because I can't try any auto generated code because of the period label issue. I would recommend trying the assembly generated by compiling this project; it shows a bunch of weird pieces of syntax.

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