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dingusppc
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Restructure main.cpp, remove obsolete code.

This commit is contained in:
Maxim Poliakovski 2020-01-28 02:20:18 +01:00
parent 117b3f1aa8
commit 2953eaa538
6 changed files with 28 additions and 371 deletions
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20
README.md
View File

@ -11,34 +11,18 @@ including those of the PowerMac G3 Beige.
## HOW TO USE
This program uses the command prompt to work.
This program currently uses the command prompt to work.
There are a few command line arguments one can enter when starting the program.
-fuzzer
Processor fuzzer, very unfinished.
There are a few command line arguments one must enter when starting the program.
-realtime
Run the emulator in runtime.
-loadelf
Load an ELF file into memory.
-debugger
Enter the interactive debugger.
-stepp
Execute a page of opcodes (256 instructions at a time).
-playground
allows users to enter 32-bit hex opcodes to mess with the PPC processor.
## HOW TO COMPILE
You'll need to install development tools first.

16
cpu/ppc/ppcemu.h
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@ -126,12 +126,6 @@ SUPERVISOR MODEL
**/
extern uint32_t opcode_value; //used for interpreting opcodes
extern uint32_t ram_size_set;
extern uint32_t rom_file_begin; //where to start storing ROM files in memory
extern uint32_t pci_io_end;
extern uint32_t rom_filesize;
//Additional steps to prevent overflow?
extern int32_t add_result;
@ -217,8 +211,6 @@ extern bool grab_return;
extern bool power_on;
extern bool is_nubus; //For early Power Mac Emulation
extern bool is_601; //For PowerPC 601 Emulation
extern bool is_gekko; //For GameCube Emulation
extern bool is_altivec; //For Altivec Emulation
@ -227,7 +219,6 @@ extern bool is_64bit; //For PowerPC G5 Emulation
//Important Addressing Integers
extern uint32_t ppc_cur_instruction;
extern uint32_t ppc_effective_address;
extern uint32_t ppc_real_address;
extern uint32_t ppc_next_instruction_address;
//Profiling Stats
@ -238,10 +229,6 @@ extern uint32_t supervisor_inst_num;
//Function prototypes
extern void ppc_cpu_init(uint32_t proc_version);
uint32_t reg_print();
uint32_t reg_read();
uint32_t reg_write();
void ppc_illegalop();
void ppc_opcode4();
void ppc_opcode16();
@ -293,9 +280,6 @@ void ppc_tbr_update();
//MEMORY DECLARATIONS
extern MemCtrlBase* mem_ctrl_instance;
extern unsigned char* machine_sysram_mem;
extern unsigned char* machine_sysrom_mem;
//The functions used by the PowerPC processor
extern void ppc_bcctr();
extern void ppc_bcctrl();

11
cpu/ppc/ppcexec.cpp
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@ -14,6 +14,17 @@
bool power_on = 1;
SetPRS ppc_state;
bool grab_branch;
bool grab_exception;
bool grab_return;
bool grab_breakpoint;
uint32_t ppc_cur_instruction; //Current instruction for the PPC
uint32_t ppc_effective_address;
uint32_t ppc_next_instruction_address; //Used for branching, setting up the NIA
BB_end_kind bb_kind; /* basic block end */
uint64_t timebase_counter; /* internal timebase counter */

2
cpu/ppc/ppcmmu.cpp
View File

@ -365,7 +365,7 @@ static uint32_t ppc_mmu_instr_translate(uint32_t la)
/** PowerPC-style MMU data address translation. */
static uint32_t ppc_mmu_addr_translate(uint32_t la, int is_write)
{
#if PROFILER
#ifdef PROFILER
mmu_translations_num++;
#endif

11
debugger/debugger.cpp
View File

@ -24,7 +24,6 @@ void show_help()
cout << " until X -- execute until address X is reached" << endl;
cout << " regs -- dump content of the GRPs" << endl;
cout << " set R=X -- assign value X to register R" << endl;
cout << " memdump -- dump content of the system memory to memdump.bin" << endl;
#ifdef PROFILER
cout << " profiler -- show stats related to the processor" << endl;
#endif
@ -46,14 +45,6 @@ void dump_regs()
cout << "MSR: " << hex << ppc_state.ppc_msr << endl;
}
void dump_mem_file()
{
std::ofstream memdumpfile;
memdumpfile.open("memdump.bin", std::ofstream::out | std::ofstream::binary);
memdumpfile.write((char *)&machine_sysram_mem, sizeof(char) * 67108864);
memdumpfile.close();
}
void enter_debugger()
{
string inp, cmd, addr_str, expr_str, reg_expr, last_cmd;
@ -83,8 +74,6 @@ void enter_debugger()
show_help();
} else if (cmd == "quit") {
break;
} else if (cmd == "memdump") {
dump_mem_file();
}
#ifdef PROFILER
else if (cmd == "profiler") {

339
main.cpp
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@ -53,106 +53,14 @@ static const map<string,string> PPCMac_ROMIdentity = { //Codename Abbreviation f
{"????", "A clone, perhaps?"} //N/A (Placeholder ID)
};
SetPRS ppc_state;
bool is_nubus = 0;
bool grab_branch;
bool grab_exception;
bool grab_return;
bool grab_breakpoint;
uint32_t ppc_cur_instruction; //Current instruction for the PPC
uint32_t ppc_effective_address;
uint32_t ppc_real_address;
uint32_t ppc_next_instruction_address; //Used for branching, setting up the NIA
MemCtrlBase *mem_ctrl_instance = 0;
HeathrowIC *heathrow = 0;
GossamerID *machine_id;
unsigned char * machine_sysram_mem;
unsigned char * machine_sysrom_mem;
uint32_t grab_sysram_size;
uint32_t grab_iocont_size;
uint32_t grab_sysrom_size;
uint32_t ram_size_set;
uint32_t prev_msr_state = 0;
uint32_t cur_msr_state = 0;
//MSR Flags
bool msr_es_change; //Check Endian
uint32_t rom_file_begin; //where to start storing ROM files in memory
uint32_t pci_io_end;
uint32_t rom_filesize;
uint32_t write_opcode;
uint8_t write_char;
//Debugging Functions
uint32_t reg_print(){
for (uint32_t i = 0; i < 32; i++){
printf("FPR %d : %" PRIx64 "", i, ppc_state.ppc_fpr[i].int64_r);
}
ppc_state.ppc_pc = 0;
for (uint32_t i = 0; i < 32; i++){
printf("GPR %d : %x", i, ppc_state.ppc_gpr[i]);
}
printf("CR : %x", ppc_state.ppc_cr);
printf("FPSCR : %x", ppc_state.ppc_fpscr);
printf("TBR 0 : %x", ppc_state.ppc_tbr[0]);
printf("TBR 1 : %x", ppc_state.ppc_tbr[1]);
for (uint32_t i = 0; i < 1024; i++){
printf("SPR %d : %x", i, ppc_state.ppc_spr[i]);
}
printf("CR : %x", ppc_state.ppc_cr);
printf("MSR : %x", ppc_state.ppc_msr);
for (uint32_t i = 0; i < 16; i++){
printf("SR %d : %x", i, ppc_state.ppc_sr[i]);
}
return 0;
}
uint32_t reg_read(){
uint32_t grab_me = 0;
std::cout << hex << "TODO: Decide which register to read from; for now, which GPR?" << endl;
//printf("Which register to read from? 0 - GPR, 1 = FPR, 2 = CR, 3 = FPSCR");
std::cin >> hex >> grab_me;
if (grab_me < 32){
printf("GPR value: %d", ppc_state.ppc_gpr[grab_me]);
}
return 0;
}
uint32_t reg_write(){
uint32_t grab_me = 0;
std::cout << hex << "TODO: Decide which register to write to; for now, which GPR?" << endl;
//printf("Which register to write to? 0 - GPR, 1 = FPR, 2 = CR, 3 = FPSCR");
std::cin >> hex >> grab_me;
if (grab_me < 32){
printf("GPR value: %d", ppc_state.ppc_gpr[grab_me]);
}
return 0;
}
int main(int argc, char **argv)
{
ram_size_set = 0x4000000; //64 MB of RAM for the Mac
rom_file_begin = 0xFFF00000; //where to start storing ROM files in memory
pci_io_end = 0x83FFFFFF;
rom_filesize = 0x400000;
uint32_t rom_filesize;
/* Init virtual CPU and request MPC750 CPU aka G3 */
ppc_cpu_init(PPC_VER::MPC750);
@ -189,27 +97,6 @@ int main(int argc, char **argv)
return 1;
}
machine_sysram_mem = (unsigned char*) calloc (67108864, 1);
machine_sysrom_mem = (unsigned char*) calloc (rom_filesize, 1);
memset(machine_sysram_mem, 0x0, 67108864);
grab_sysram_size = sizeof(machine_sysram_mem);
grab_sysrom_size = rom_filesize;
//Sanity checks - Prevent the input files being too small or too big.
//Also prevent the ROM area from overflow.
if (ram_size_set < 0x800000){
cerr << "The RAM size must be at least 8 MB to function.\n";
return 1;
}
else if (ram_size_set > 0x20000000){
cerr << "RAM too big. Must be no more than 2 GB.\n";
return 1;
}
rom_file_begin = 0xFFFFFFFF - grab_sysrom_size + 1;
char configGrab = 0;
uint32_t configInfoOffset = 0;
@ -217,10 +104,6 @@ int main(int argc, char **argv)
romFile.get(configGrab); //just one byte to determine ConfigInfo location
configInfoOffset = (uint32_t)(configGrab & 0xff);
if (configInfoOffset == 0xC0){
is_nubus = 1;
}
uint32_t configInfoAddr = 0x300000 + (configInfoOffset << 8) + 0x69; //address to check the identifier string
char memPPCBlock[5]; //First four chars are enough to distinguish between codenames
romFile.seekg (configInfoAddr, ios::beg);
@ -269,233 +152,39 @@ int main(int argc, char **argv)
return 1;
}
//Read ROM file content and transfer it to the dedicated ROM region
romFile.read ((char *)machine_sysrom_mem,grab_sysrom_size);
mem_ctrl_instance->set_data(0xFFC00000, machine_sysrom_mem, rom_filesize);
/* Read ROM file content and transfer it to the dedicated ROM region */
unsigned char *sysrom_mem = new unsigned char[rom_filesize];
romFile.read ((char *)sysrom_mem, rom_filesize);
mem_ctrl_instance->set_data(0xFFC00000, sysrom_mem, rom_filesize);
romFile.close();
delete[] sysrom_mem;
if (argc > 1){
if (argc > 1) {
string checker = argv[1];
cout << checker << endl;
if (checker == "fuzzer"){
//Brute force every instruction that the PPC can interpret.
//TODO: Change this so that this goes through user-specified instructions.
ppc_cur_instruction = 0xFFFFFFFF;
std::cout << "Testing Opcode: " << ppc_cur_instruction << endl;
while (ppc_cur_instruction > 0x00000000){
ppc_main_opcode();
ppc_cur_instruction--;
}
}
else if ((checker=="1")|(checker=="realtime")|(checker=="/realtime")|(checker=="-realtime")){
if ((checker == "1") || (checker == "realtime") || (checker == "/realtime")
|| (checker == "-realtime")) {
ppc_exec();
}
else if ((checker=="e")|(checker=="loadelf")|(checker=="/loadelf")|(checker=="-loadelf")){
ifstream elfFile;
uint32_t elf_file_setsize = 0;
char elf_headerchk [4];
char elf_bformat [1];
char elf_machine [2];
char elf_memoffset [4];
elfFile.seekg(0, elfFile.end);
elf_file_setsize = (uint32_t) elfFile.tellg();
elfFile.seekg (0, elfFile.beg);
if (elf_file_setsize < 45){
cerr << "Elf File TOO SMALL. Please make sure it's a legitimate file.";
return 1;
}
else if (elf_file_setsize > ram_size_set){
cerr << "Elf File TOO BIG. Please make sure it fits within memory.";
return 1;
}
//There's got to be a better way to get fields of info from an ELF file.
elfFile.seekg(0x0, ios::beg); //ELF file begins here
elfFile.read(elf_headerchk, 4);
elfFile.seekg(0x4, ios::cur);
elfFile.read(elf_bformat, 1);
elfFile.seekg(0x8, ios::cur);
elfFile.read(elf_machine, 2);
elfFile.seekg(0x6, ios::cur);
elfFile.read(elf_memoffset, 4);
elfFile.seekg (0, elfFile.beg);
bool elf_valid_check = (atoi(elf_headerchk) == 0x7F454C46) && (atoi(elf_bformat) == 1) &&\
((atoi(elf_machine) == 0) | (atoi(elf_machine) == 20));
if (!elf_valid_check){
cerr << "The ELF file inserted was not legitimate. Please try again." << endl;
return 1;
}
elfFile.read ((char *)machine_sysram_mem,ram_size_set);
if (argc > 2){
string elfname = string(argv[1]);
elfname = elfname + ".elf";
elfFile.open(elfname, ios::in|ios::binary);
}
else{
elfFile.open("test.elf", ios::in|ios::binary);
}
if (elfFile.fail()){
cerr << "Please insert the elf file before continuing.\n";
return 1;
}
ppc_state.ppc_pc = atoi(elf_memoffset);
ppc_exec();
}
else if ((checker=="until")|(checker=="/until")|(checker=="-until")){
uint32_t grab_bp = 0x0;
std::cout << hex << "Enter the address in hex for where to stop execution." << endl;
cin >> hex >> grab_bp;
ppc_exec_until(grab_bp);
}
else if (checker=="disas"){
if (argc > 2){
checker = argv[1];
}
else{
checker = "\\compile.txt";
}
ifstream inFile (checker, ios::binary | ios::ate);
if (!inFile) {
cerr << "Unable to open file for assembling.";
exit(1);
}
}
else if ((checker=="stepi")|(checker=="/stepi")|(checker=="-stepi")){
std::cout << hex << "Ready to execute an opcode?" << endl;
string check_q;
cin >> check_q;
getline (cin, check_q);
if (check_q != "No"){
quickinstruction_translate(ppc_state.ppc_pc);
ppc_main_opcode();
if (grab_branch & !grab_exception){
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();
}
}
}
else if ((checker=="stepp")|(checker=="/stepp")|(checker=="-stepp")){
std::cout << hex << "Ready to execute a page of opcodes?" << endl;
string check_q;
cin >> check_q;
getline (cin, check_q);
if (check_q != "No"){
for (int instructions_to_do = 0; instructions_to_do < 256; instructions_to_do++){
quickinstruction_translate(ppc_state.ppc_pc);
ppc_main_opcode();
if (grab_branch & !grab_exception){
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();
}
}
}
}
else if ((checker=="play")|(checker=="playground")|(checker=="/playground")|(checker=="-playground")){
std::cout << hex << "Enter any opcodes for the PPC you want here." << endl;
while (power_on){
cin >> hex >> opcode_entered;
//power off the PPC
if (opcode_entered == 0x00000000){
power_on = 0;
}
//print registers
else if (opcode_entered == 0x00000001){
reg_print();
}
else if (opcode_entered == 0x00000002){
reg_read();
}
else if (opcode_entered == 0x00000003){
reg_write();
}
//test another opcode
else{
ppc_cur_instruction = opcode_entered;
quickinstruction_translate(ppc_state.ppc_pc);
ppc_main_opcode();
if (grab_branch & !grab_exception){
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();
}
}
}
} else if (checker == "debugger") {
} else if ((checker == "debugger") || (checker == "/debugger") ||
(checker == "-debugger")) {
enter_debugger();
}
}
else{
else {
std::cout << " " << endl;
std::cout << "Please enter one of the following commands when " << endl;
std::cout << "booting up DingusPPC... " << endl;
std::cout << " " << endl;
std::cout << " " << endl;
std::cout << "realtime - Run the emulator in real-time. " << endl;
std::cout << "loadelf - Load an ELF file to run from RAM. " << endl;
std::cout << "debugger - Enter the interactive debugger. " << endl;
std::cout << "fuzzer - Test every single PPC opcode. " << endl;
std::cout << "stepp - Execute a page of opcodes per key press." << endl;
std::cout << "playground - Mess around with and opcodes. " << endl;
}
/* Free memory after the emulation is completed. */
delete(heathrow);
delete(machine_id);
delete(mem_ctrl_instance);
//Free memory after the emulation is completed.
free(machine_sysram_mem);
free(machine_sysrom_mem);
return 0;
}