src/monitor/asm/Disassembler.cpp

   1 #include <iostream>
   2 #include "Disassembler.h"
   3 #include "platform/BidirectionalPipe.h"
   4 #include "platform/ArgumentList.h"
   5 #include "misc/String.h"
   6 #include "Message.h"
   7
   8 namespace Aesalon {
   9 namespace Monitor {
  10 namespace ASM {
  11
  12 Disassembler::Disassembler(Misc::SmartPointer<ELF::Parser> elf_parser) : elf_parser(elf_parser) {
  13     Platform::ArgumentList al;
  14     al.add_argument("/usr/bin/objdump"); /* NOTE: hardcoded path . . . */
  15     al.add_argument("-dMintel");
  16     al.add_argument("--section=.text");
  17     al.add_argument(elf_parser->get_filename());
  18
  19     bi_pipe = new Platform::BidirectionalPipe(al, true);
  20
  21     Message::Message(Aesalon::Monitor::Message::DEBUG_MESSAGE, "Beginning disassembly of target");
  22     parse_objdump_output();
  23     Message::Message(Aesalon::Monitor::Message::DEBUG_MESSAGE, "Disassembly of target completed");
  24     bi_pipe = NULL;
  25 }
  26
  27 void Disassembler::parse_objdump_output() {
  28     std::string line;
  29     Misc::SmartPointer<ELF::Symbol> symbol = NULL;
  30     while(bi_pipe->is_open()) {
  31         line = bi_pipe->get_string();
  32         if(line == "") continue;
  33
  34         /*std::cout << "parsing objdump line \"" << line << "\"\n";*/
  35
  36         Word address = 0;
  37         Misc::String::to<Word>(line, address, true);
  38         if(address < elf_parser->get_section(".text")->get_virtual_address()) continue;
  39
  40         line.erase(0, line.find(" "));
  41         while(line[0] == ' ') line.erase(0, 1);
  42
  43         if(line[0] == '<') {
  44             line.erase(0, 1);
  45             line.erase(line.find(">"));
  46             /* NOTE: ignores all symbols beginning with __ . . . */
  47             if(line.substr(0, 2) == "__") symbol = NULL;
  48             else {
  49                 symbol = elf_parser->get_symbol(line);
  50                 /*std::cout << "\tSymbol name is \"" << line << "\"\n";*/
  51             }
  52             continue;
  53         }
  54         /* it's an instruction . . . */
  55         if(!symbol.is_valid()) continue; /* Continue if there's no resolved symbol ATM . . . */
  56         if(line.find("<") != std::string::npos) line.erase(line.find("<"));
  57         bool finished = false;
  58         while(!finished) {
  59             Byte value = 0;
  60             Misc::String::to<Byte>(line.substr(0, 2), value, true);
  61             if(value == 0) break;
  62             line.erase(0, 1);
  63         }
  64         while(line.length() && line[line.length()-1] == ' ') line.erase(line.length()-1);
  65         while(line.length() && (line[0] == ' ' || line[0] == '\t')) {
  66             line.erase(0, 1);
  67         }
  68         if(line == "") continue;
  69         std::cout << "\tAssembly instruction is \"" << line << "\"\n";
  70         /* Now parse the instruction and push it onto the InstructionList for the symbol . . . */
  71         if(!symbol_to_il[symbol->get_symbol_name()].is_valid())
  72             symbol_to_il[symbol->get_symbol_name()] = new InstructionList(symbol->get_address());
  73
  74         symbol_to_il[symbol->get_symbol_name()]->add_instruction(new Instruction(line));
  75     }
  76 }
  77
  78 } // namespace ASM
  79 } // namespace Monitor
  80 } // namespace Aesalon