Class: Flux::Disassembler

Inherits:
Object
  • Object
show all
Includes:
OpcodeRegistry
Defined in:
lib/superinstance/flux-runtime/disassembler.rb

Overview

Bytecode to text disassembly

Constant Summary collapse

MNEMONIC_MAP = 
OPCODE_CLASSES.transform_keys(&:to_i).freeze

Constants included from OpcodeRegistry

OpcodeRegistry::OPCODE_CLASSES, OpcodeRegistry::OPCODE_NAMES

Instance Method Summary collapse

Methods included from OpcodeRegistry

opcode_name

Instance Method Details

#disassemble(bytecode_string) ⇒ Object 



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# File 'lib/superinstance/flux-runtime/disassembler.rb', line 12

def disassemble(bytecode_string)
  bytecode = bytecode_string.dup.force_encoding('BINARY')
  output = []
  pc = 0

  while pc < bytecode.bytesize
    offset = pc
    opcode = bytecode.getbyte(pc)
    pc += 1

    mnemonic = OPCODE_NAMES[opcode] || "Unknown_0x#{opcode.to_s(16).upcase}"
    line = "#{mnemonic}"

    case opcode
    # Format A: 1 byte
    when 0x00, 0x01, 0x02, 0x08, 0x09, 0x0A
      # No operands

    # Format B: +Rd +Rs (2 bytes)
    when 0x10, 0x11, 0x12, 0x20, 0x40
      rd = bytecode.getbyte(pc)
      rs = bytecode.getbyte(pc + 1)
      line = "#{mnemonic} R#{rd}, R#{rs}"
      pc += 2

    when 0x13  # Swap: Ra, Rb
      ra = bytecode.getbyte(pc)
      rb = bytecode.getbyte(pc + 1)
      line = "#{mnemonic} R#{ra}, R#{rb}"
      pc += 2

    # Format C: +Rd +Ra +Rb (3 bytes)
    when 0x21..0x37, 0x41..0x59, 0x60..0x63, 0x90..0x92, 0xA0..0xA5, 0xB2..0xB4
      rd = bytecode.getbyte(pc)
      ra = bytecode.getbyte(pc + 1)
      rb = bytecode.getbyte(pc + 2)
      line = "#{mnemonic} R#{rd}, R#{ra}, R#{rb}"
      pc += 3

    # Format D: +Rd +imm16 (3 bytes)
    when 0x28, 0x29, 0x79
      rd = bytecode.getbyte(pc)
      imm_lo = bytecode.getbyte(pc + 1)
      imm_hi = bytecode.getbyte(pc + 2)
      imm = imm_lo | (imm_hi << 8)
      # Sign extend
      imm = (imm << 16) >> 16
      line = "#{mnemonic} R#{rd}, #{imm}"
      pc += 3

    # Format E: +Rd +Rb +off16 (4 bytes)
    when 0x70..0x78
      rd = bytecode.getbyte(pc)
      rb = bytecode.getbyte(pc + 1)
      off_lo = bytecode.getbyte(pc + 2)
      off_hi = bytecode.getbyte(pc + 3)
      off = off_lo | (off_hi << 8)
      line = "#{mnemonic} R#{rd}, R#{rb}, #{off}"
      pc += 4

    when 0xB0, 0xB1  # VLoad, VStore
      rd = bytecode.getbyte(pc)
      rb = bytecode.getbyte(pc + 1)
      off_lo = bytecode.getbyte(pc + 2)
      off_hi = bytecode.getbyte(pc + 3)
      off = off_lo | (off_hi << 8)
      line = "#{mnemonic} R#{rd}, R#{rb}, #{off}"
      pc += 4

    # Format G: variable
    when 0x03, 0x04, 0x05  # Jump, JumpIf, JumpIfNot
      length = bytecode.getbyte(pc)
      pc += 1
      off_lo = bytecode.getbyte(pc)
      off_hi = bytecode.getbyte(pc + 1)
      off = off_lo | (off_hi << 8)
      off = (off << 16) >> 16  # Sign extend
      line = "#{mnemonic} #{off}"
      pc += 2

    when 0x06  # Call
      length = bytecode.getbyte(pc)
      pc += 1
      func_lo = bytecode.getbyte(pc)
      func_hi = bytecode.getbyte(pc + 1)
      func_idx = func_lo | (func_hi << 8)
      line = "#{mnemonic} #{func_idx}"
      pc += 2

    when 0x07  # CallIndirect
      length = bytecode.getbyte(pc)
      pc += 1
      reg = bytecode.getbyte(pc)
      line = "#{mnemonic} R#{reg}"
      pc += 1

    when 0x80  # ASend
      length = bytecode.getbyte(pc)
      pc += 1
      agent_id = bytecode.getbyte(pc)
      reg = bytecode.getbyte(pc + 1)
      line = "#{mnemonic} #{agent_id}, R#{reg}"
      pc += 2

    when 0x81  # ARecv
      length = bytecode.getbyte(pc)
      pc += 1
      agent_id = bytecode.getbyte(pc)
      reg = bytecode.getbyte(pc + 1)
      line = "#{mnemonic} #{agent_id}, R#{reg}"
      pc += 2

    when 0x82  # AAsk
      length = bytecode.getbyte(pc)
      pc += 1
      agent_id = bytecode.getbyte(pc)
      reg = bytecode.getbyte(pc + 1)
      line = "#{mnemonic} #{agent_id}, R#{reg}"
      pc += 2

    when 0x83  # ATell
      length = bytecode.getbyte(pc)
      pc += 1
      agent_id = bytecode.getbyte(pc)
      reg = bytecode.getbyte(pc + 1)
      line = "#{mnemonic} #{agent_id}, R#{reg}"
      pc += 2

    when 0x84  # ADelegate
      length = bytecode.getbyte(pc)
      pc += 1
      agent_id = bytecode.getbyte(pc)
      bc_lo = bytecode.getbyte(pc + 1)
      bc_hi = bytecode.getbyte(pc + 2)
      bc_start = bc_lo | (bc_hi << 8)
      line = "#{mnemonic} #{agent_id}, #{bc_start}"
      pc += 3

    when 0x85  # ABroadcast
      length = bytecode.getbyte(pc)
      pc += 1
      reg = bytecode.getbyte(pc)
      line = "#{mnemonic} R#{reg}"
      pc += 1

    when 0x86  # ASubscribe
      length = bytecode.getbyte(pc)
      pc += 1
      channel_id = bytecode.getbyte(pc)
      line = "#{mnemonic} #{channel_id}"
      pc += 1

    when 0x87  # AWait
      length = bytecode.getbyte(pc)
      pc += 1
      cond_reg = bytecode.getbyte(pc)
      line = "#{mnemonic} R#{cond_reg}"
      pc += 1

    when 0x88  # ATrust
      length = bytecode.getbyte(pc)
      pc += 1
      agent_id = bytecode.getbyte(pc)
      level = bytecode.getbyte(pc + 1)
      line = "#{mnemonic} #{agent_id}, #{level}"
      pc += 2

    when 0x89  # AVerify
      length = bytecode.getbyte(pc)
      pc += 1
      agent_id = bytecode.getbyte(pc)
      result_reg = bytecode.getbyte(pc + 1)
      line = "#{mnemonic} #{agent_id}, R#{result_reg}"
      pc += 2

    else
      pc += 3  # Skip unknown bytes
    end

    output << "    #{offset.to_s(16).rjust(8, '0')}: #{line}"
  end

  output.join("\n")
end