dingusppc/debugger/debugger.cpp

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2019-07-17 13:24:34 +00:00
#include <stdio.h>
#include <string>
#include <sstream>
#include <iostream>
#include <map>
#include "../ppcemumain.h"
#include "../cpu/ppc/ppcmemory.h"
2019-07-17 13:24:34 +00:00
using namespace std;
void show_help()
{
cout << "Debugger commands:" << endl;
cout << " step -- execute single instruction" << endl;
cout << " until X -- execute until address X is reached" << endl;
cout << " regs -- dump content of the GRPs" << endl;
cout << " disas X,n -- disassemble N instructions starting at address X" << endl;
cout << " quit -- quit the debugger" << endl << endl;
cout << "Pressing ENTER will repeat last command." << endl;
}
void dump_regs()
{
for (uint32_t i = 0; i < 32; i++)
cout << "GPR " << dec << i << " : " << hex << ppc_state.ppc_gpr[i] << endl;
cout << "PC: " << hex << ppc_state.ppc_pc << endl;
cout << "LR: " << hex << ppc_state.ppc_spr[8] << endl;
cout << "CR: " << hex << ppc_state.ppc_cr << endl;
cout << "CTR: " << hex << ppc_state.ppc_spr[9] << endl;
cout << "XER: " << hex << ppc_state.ppc_spr[1] << endl;
cout << "MSR: " << hex << ppc_state.ppc_msr << endl;
}
void execute_single_instr()
{
quickinstruction_translate(ppc_state.ppc_pc);
//cout << "Current instruction: " << hex << ppc_cur_instruction << endl;
ppc_main_opcode();
if (grab_branch && !grab_exception) {
//cout << "Grab branch, EA: " << hex << ppc_next_instruction_address << endl;
ppc_state.ppc_pc = ppc_next_instruction_address;
grab_branch = 0;
ppc_tbr_update();
}
else if (grab_return || grab_exception) {
ppc_state.ppc_pc = ppc_next_instruction_address;
grab_exception = 0;
grab_return = 0;
ppc_tbr_update();
}
else {
ppc_state.ppc_pc += 4;
ppc_tbr_update();
}
}
void execute_until(uint32_t goal_addr)
{
while(ppc_state.ppc_pc != goal_addr)
execute_single_instr();
}
void enter_debugger()
{
string inp, cmd, addr_str, last_cmd;
uint32_t addr;
std::stringstream ss;
cout << "Welcome to the PowerPC debugger." << endl;
cout << "Please enter a command or 'help'." << endl << endl;
while (1) {
cout << "ppcdbg> ";
/* reset string stream */
ss.str("");
ss.clear();
cmd = "";
getline(cin, inp, '\n');
ss.str(inp);
ss >> cmd;
if (cmd.empty() && !last_cmd.empty()) {
cmd = last_cmd;
cout << cmd << endl;
}
if (cmd == "help") {
show_help();
} else if (cmd == "quit") {
break;
} else if (cmd == "regs") {
dump_regs();
} else if (cmd == "step") {
execute_single_instr();
} else if (cmd == "until") {
ss >> addr_str;
addr = stol(addr_str, NULL, 16);
execute_until(addr);
} else if (cmd == "disas") {
cout << "Disassembling not implemented yet. Sorry!" << endl;
} else {
cout << "Unknown command: " << cmd << endl;
continue;
}
last_cmd = cmd;
}
}