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VM

发展路线​

eBPF → rBPF → Solana rBPF → Solana Bytecode Format

BPF​

这里我们说的 bpf 均为 ebfp: whats ebpf resp in Chinese

rBPF​

GitHub - qmonnet/rbpf: Rust virtual machine and JIT compiler for eBPF programs

While BPF programs are originally intended to run in the kernel, the virtual machine of this crate enables running it in user-space applications; it contains an interpreter, an x86_64 JIT-compiler for eBPF programs, as well as a disassembler.

简而言之，rust 语言编写的，用户态的，有 JIT（only on x86 linux）的 ，eBPF 虚拟机

Solana rBPF & Solana Bytecode Format​

GitHub - solana-labs/rbpf: Rust virtual machine and JIT compiler for eBPF programs

Forked for:

  • 自定义的 LLVM 后端
  • 删除一些原始 eBPF 的验证，例如循环检查，内存检查等等
  • 重写 syscall
  • 绑定智能合约的入口点

 

reference​

这部分内容缺少文档，有意思的是在 dot社区有很多对 solana bpf vm的讨论很有意思，尤其是还与 wasm 作了比较。

eBPF contracts hackathon

Bringing solana's ebpf based smart-contract execution to polkadot

关于 Solana Bytecode Format ，现在不叫 sbf 了，现在叫 sBPF

Rename Solana Bytecode Format(SBF) toolchain · Issue #30566 · solana-labs/solana

Update references to platform-tools by dmakarov · Pull Request #30764 · solana-labs/solana