jit-tutorial | How to write a very simple JIT compiler | Compiler library

by spencertipping C Version: Current License: No License

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kandi X-RAY | jit-tutorial Summary

jit-tutorial is a C library typically used in Utilities, Compiler applications. jit-tutorial has no bugs, it has no vulnerabilities and it has medium support. You can download it from GitHub.

How to write a very simple JIT compiler

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jit-tutorial has a medium active ecosystem.

It has 1552 star(s) with 88 fork(s). There are 27 watchers for this library.

It had no major release in the last 6 months.

jit-tutorial has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of jit-tutorial is current.

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jit-tutorial has no bugs reported.

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jit-tutorial has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

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jit-tutorial does not have a standard license declared.

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Installation instructions are not available. Examples and code snippets are available.

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Community Discussions

Trending Discussions on jit-tutorial

Why does powerpc need this additional fluff to make a raw machine code function work?

QUESTION

Why does powerpc need this additional fluff to make a raw machine code function work?

Asked 2019-Mar-25 at 19:28

I'm working on a simple JIT compiler for PowerPC, I followed the examples in https://github.com/spencertipping/jit-tutorial to get a hang of how to work with it.

The problem is that the identity function in the second example "jitproto.c" can't really be ported to powerpc as is, using the "LWA" and "BLR" instructions, it just causes segfaults when executed.

In the end I used the machine code output of the SLJIT compiler (https://github.com/linux-on-ibm-z/sljit) to see what I'm doing wrong, and I see it generates 12 instruction words before what I thought would be the function.

So what are those instructions doing? Why can't I just start the function directly like in x86?

Code can be compiled with a C99 compiler on PPC64 (tested in a powermac and a power8 server).

...

ANSWER

Answered 2019-Mar-25 at 18:12

The instructions are required for setting up the stack layout of PPC64 ABI. See here: http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi.html#STACK

Source https://stackoverflow.com/questions/55329481

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