Re: [Capstone-users] llvm tablegen files

[Ben H. <ben...@ul...>]

Thanks Quynh, I’ve add RISC-V support to my fork of the capstone repository at https://github.com/benhorgan/capstone. Currently this just supports RV32I with the M extension. I have not updated the bindings or the msvc solution. There is a RISC-V test in the format of the other tests. I have checked the output against gnu objdump and it matches. (jalr uses the format currently used by the spec rather than objdump)

The llvm based files were taken from: https://github.com/lowRISC/riscv-llvm-integration at Latest commit 74e4050 on 3 Oct 2017. This is based on llvm 5.0 and has not been taken upstream so there will probably be more churn here.

Groups used:

GRP_JMP: jal, jalr, bne, bltu, blt, bgeu, bge, beq

GRP_INT: ecall, ebreak

GRP_LOAD_IMM: auipc, lui

A GRP_LOAD_IMM instruction followed immediately by a jalr instruction can be consided to make jump direct.

Thanks,

Ben

From: Nguyen Anh Quynh [mailto:aq...@gm...]
Sent: 05 March 2018 13:14
To: Capstone disassembly framework (www.capstone-engine.org)
Subject: Re: [Capstone-users] llvm tablegen files

i used some adhoc scripts, but still modified that manually.

you should look into existing tables to see how to do that yourself.



Thanks,
Quynh

http://www.keystone-engine.org
http://www.capstone-engine.org
http://www.unicorn-engine.org


On Fri, Mar 2, 2018 at 2:29 AM, Ben Horgan <ben...@ul...<mailto:ben...@ul...>> wrote:
Hi,

I’m looking at how the tablegen files are used in capstone and was wondering if there were any scripts for converting to the c output used by capstone or if this is done by hand. The files are generated using command lines of the form:
./bin/llvm-tblgen.exe -gen-subtarget -I=../include -I=../lib/Target/Mips ../lib/Target/Mips/Mips.td >MipsGenSubTargetInfoBRH.inc

This is towards doing something similar for RISC-V in capstone using the https://github.com/lowRISC/riscv-llvm-integration repo.

Thanks,

Ben

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