https://github.com/racerxdl/riscv-online-asm

RISC-V Online Assembler using Emscripten, Gnu Binutils
https://github.com/racerxdl/riscv-online-asm

assembler assembly binutils gas risc-v risc-v-assembly riscv

Last synced: 6 days ago
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RISC-V Online Assembler using Emscripten, Gnu Binutils

• Host: GitHub
• URL: https://github.com/racerxdl/riscv-online-asm
• Owner: racerxdl
• Created: 2021-10-12T07:30:40.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2023-08-19T19:31:51.000Z (about 1 year ago)
• Last Synced: 2024-05-02T01:25:50.849Z (7 months ago)
• Topics: assembler, assembly, binutils, gas, risc-v, risc-v-assembly, riscv
• Language: JavaScript
• Homepage: https://riscvasm.lucasteske.dev
• Size: 3.64 MB
• Stars: 38
• Watchers: 3
• Forks: 5
• Open Issues: 3
• Metadata Files:
  • Readme: README.md

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README

        
# RISC-V Online Assembler

This is a very crude online assembler for RISC-V assembly (all variants that gas supports)

It uses a webassembly compiled version of gnu as, objdump and objcopy to build the assembly.

It has been done REALLY quick (probably less than 2h) for my RISC-V Emulator series (currently only in portuguese at [https://www.youtube.com/playlist?list=PLEP_M2UAh9q6_2Jtvs9fgOVlRgsruii2m](https://www.youtube.com/playlist?list=PLEP_M2UAh9q6_2Jtvs9fgOVlRgsruii2m))

### Compiling binutils

```bash

wget http://ftp.gnu.org/gnu/binutils/binutils-2.31.tar.xz

tar -xf binutils-2.31.tar.xz

rm binutils-2.31.tar.xz

mkdir -p build

mkdir -p bins

mkdir -p web

cd build

source {PATH_TO_EMSDK}/emsdk_env.sh

echo "Module['FS'] = FS;" > post-js.txt

emconfigure ../binutils-2.31/configure --disable-doc --build=x86 --host=wasm32 --target=riscv64-linux-gnu

emmake make -j4 CFLAGS="-DHAVE_PSIGNAL=1 -DELIDE_CODE -D__GNU_LIBRARY__ -O2" LDFLAGS="-s MODULARIZE=1 -s FORCE_FILESYSTEM=1 --post-js $(pwd)/post-js.txt"

emmake make install DESTDIR="$(pwd)/../bins"

cp binutils/objcopy.wasm binutils/objdump.wasm gas/as-new.wasm ld/ld-new.wasm ../web

cd ..

cd bins

cp usr/local/bin/riscv64-linux-gnu-as ../web/riscv64-linux-gnu-as.js

cp usr/local/bin/riscv64-linux-gnu-objcopy ../web/riscv64-linux-gnu-objcopy.js

cp usr/local/bin/riscv64-linux-gnu-objdump ../web/riscv64-linux-gnu-objdump.js

cp usr/local/bin/riscv64-linux-gnu-objdump ../web/riscv64-linux-gnu-objdump.js

cp usr/local/bin/riscv64-linux-gnu-ld ../web/riscv64-linux-gnu-ld.js

```