A Migration Method of MPI Program Combining Local Library Replacement and Instruction Translation

Algorithm 3

Opcode interception algorithm.

//function: intercept opcode to redirect program flow

//input: the code segment of executable file (.text), list of

library function, current environment (env)

//output: instructions calling local library function

Foreach insn in  .text

 switch insn

 case: call insn

  if (the address of calling instruction is in the func_info)

 generate instructions of moving local argument

 generate instructions of calling local library function

 generate ret instruction of storing library function

   break;

  case

   ⋯

  default

   ⋯

  break

Endfor