static void gdb_read_command()
{
u8 c;
u8 chk_read, chk_calc;
cmd_len = 0;
memset(cmd_bfr, 0, sizeof cmd_bfr);
c = gdb_read_byte();
if (c == '+')
{
// ignore ack
return;
}
else if (c == 0x03)
{
CPU::Break();
gdb_signal(GDB_SIGTRAP);
return;
}
else if (c != GDB_STUB_START)
{
DEBUG_LOG(GDB_STUB, "gdb: read invalid byte %02x", c);
return;
}
while ((c = gdb_read_byte()) != GDB_STUB_END)
{
cmd_bfr[cmd_len++] = c;
if (cmd_len == sizeof cmd_bfr)
{
ERROR_LOG(GDB_STUB, "gdb: cmd_bfr overflow");
gdb_nak();
return;
}
}
chk_read = hex2char(gdb_read_byte()) << 4;
chk_read |= hex2char(gdb_read_byte());
chk_calc = gdb_calc_chksum();
if (chk_calc != chk_read)
{
ERROR_LOG(GDB_STUB,
"gdb: invalid checksum: calculated %02x and read %02x for $%s# (length: %d)",
chk_calc, chk_read, cmd_bfr, cmd_len);
cmd_len = 0;
gdb_nak();
return;
}
DEBUG_LOG(GDB_STUB, "gdb: read command %c with a length of %d: %s", cmd_bfr[0], cmd_len, cmd_bfr);
gdb_ack();
}
int gdb_trap(struct trap_state *ts)
{
struct gdb_state r;
int signo, orig_signo;
oskit_u32_t pc;
if (gdb_signal == 0)
return -1;
/* If a recovery address has been set,
use it and return immediately. */
if (gdb_trap_recover)
{
ts->pc = gdb_trap_recover;
return 0;
}
pc = ts->pc;
/* Convert the arm32 trap code into a generic signal number. */
/* XXX some of these are probably not really right. */
switch (ts->trapno)
{
#define TRAP(trap, sig, adjust) case trap: signo = sig; pc += adjust; break
TRAP(-1, SIGINT, 0);
TRAP(T_SWI, SIGEMT, -4);
TRAP(T_PREFETCH_ABORT, SIGSEGV, -4);
TRAP(T_DATA_ABORT, SIGSEGV, -8);
TRAP(T_ADDREXC, SIGSEGV, -4);
TRAP(T_FIQ, SIGTRAP, -4);
TRAP(T_STACK_OVERFLOW, SIGBUS, -8);
case T_UNDEF:
/*
* Check for GDB breakpoint
*/
if (*((unsigned *) (ts->pc - 4)) == 0xe7ffdefe) {
signo = SIGTRAP;
pc -= 4;
}
else if (*((unsigned *) (ts->pc - 4)) == 0xe7ffdefd) {
/* See gdb_set_bkpt() */
signo = SIGTRAP;
}
else {
signo = SIGILL;
pc -= 4;
}
break;
default:
signo = SIGEMT; /* "software generated"*/
#undef TRAP
}
orig_signo = signo;
/* Convert the trap state into GDB's format. */
memset((void *) &r, 0, sizeof(r));
r.r0 = ts->r0;
r.r1 = ts->r1;
r.r2 = ts->r2;
r.r3 = ts->r3;
r.r4 = ts->r4;
r.r5 = ts->r5;
r.r6 = ts->r6;
r.r7 = ts->r7;
r.r8 = ts->r8;
r.r9 = ts->r9;
r.r10 = ts->r10;
r.r11 = ts->r11;
r.r12 = ts->r12;
r.ps = ts->spsr;
r.pc = pc;
/*
* XXX Not bothering with user mode stuff
*/
r.sp = ts->svc_sp;
r.lr = ts->svc_lr;
/* Call the appropriate GDB stub to do its thing. */
gdb_signal(&signo, &r);
/* Stuff GDB's modified state into our trap_state. */
ts->r0 = r.r0;
ts->r1 = r.r1;
ts->r2 = r.r2;
ts->r3 = r.r3;
ts->r4 = r.r4;
ts->r5 = r.r5;
ts->r6 = r.r6;
ts->r7 = r.r7;
ts->r8 = r.r8;
ts->r9 = r.r9;
ts->r10 = r.r10;
ts->r11 = r.r11;
ts->r12 = r.r12;
ts->pc = r.pc;
ts->svc_lr = r.lr;
/*
* XXX Not bothering with user mode stuff
*/
{
/* XXX currently we don't know how to change the kernel esp.
We could do it by physically moving the trap frame. */
if (r.sp != (unsigned)ts->svc_sp)
panic("gdb_trap: can't change stack pointer");
}
if (r.ps != ts->spsr)
panic("gdb_trap: can't change PSR: 0x%x 0x%x", r.ps, ts->spsr);
/* If GDB sent us back a signal number,
convert that back into a trap number. */
if (signo != 0)
{
/* If the signal number was unchanged from what we sent,
leave the trap number unchanged as well. */
if (signo == orig_signo)
return -1;
/* Otherwise, try to guess an appropriate trap number.
We can't do much, but try to get the common ones.
If we can't make a decent guess,
just leave the trap number unchanged. */
switch (signo)
{
case SIGTRAP: ts->trapno = T_UNDEF; break;
case SIGILL: ts->trapno = T_UNDEF; break;
case SIGSEGV: ts->trapno = T_DATA_ABORT;
break;
}
return -1;
}
/* GDB consumed the signal - just resume execution normally. */
return 0;
}
int Interpreter::SingleStepInner()
{
static UGeckoInstruction instCode;
u32 function = HLE::GetFunctionIndex(PC);
if (function != 0)
{
int type = HLE::GetFunctionTypeByIndex(function);
if (type == HLE::HLE_HOOK_START || type == HLE::HLE_HOOK_REPLACE)
{
int flags = HLE::GetFunctionFlagsByIndex(function);
if (HLE::IsEnabled(flags))
{
HLEFunction(function);
if (type == HLE::HLE_HOOK_START)
{
// Run the original.
function = 0;
}
}
else
{
function = 0;
}
}
}
if (function == 0)
{
#ifdef USE_GDBSTUB
if (gdb_active() && gdb_bp_x(PC))
{
Host_UpdateDisasmDialog();
gdb_signal(SIGTRAP);
gdb_handle_exception();
}
#endif
NPC = PC + sizeof(UGeckoInstruction);
instCode.hex = PowerPC::Read_Opcode(PC);
// Uncomment to trace the interpreter
//if ((PC & 0xffffff)>=0x0ab54c && (PC & 0xffffff)<=0x0ab624)
// startTrace = 1;
//else
// startTrace = 0;
if (startTrace)
{
Trace(instCode);
}
if (instCode.hex != 0)
{
UReg_MSR& msr = (UReg_MSR&)MSR;
if (msr.FP) //If FPU is enabled, just execute
{
m_opTable[instCode.OPCD](instCode);
if (PowerPC::ppcState.Exceptions & EXCEPTION_DSI)
{
PowerPC::CheckExceptions();
m_EndBlock = true;
}
}
else
{
// check if we have to generate a FPU unavailable exception
if (!PPCTables::UsesFPU(instCode))
{
m_opTable[instCode.OPCD](instCode);
if (PowerPC::ppcState.Exceptions & EXCEPTION_DSI)
{
PowerPC::CheckExceptions();
m_EndBlock = true;
}
}
else
{
PowerPC::ppcState.Exceptions |= EXCEPTION_FPU_UNAVAILABLE;
PowerPC::CheckExceptions();
m_EndBlock = true;
}
}
}
else
{
// Memory exception on instruction fetch
PowerPC::CheckExceptions();
m_EndBlock = true;
}
}
last_pc = PC;
PC = NPC;
GekkoOPInfo *opinfo = GetOpInfo(instCode);
return opinfo->numCycles;
}
int main(int argc, char *argv[])
{
u32 done;
memset(&_ctx, 0x00, sizeof _ctx);
ctx = &_ctx;
parse_args(argc, argv);
#if 0
u64 local_ptr;
local_ptr = 0xdead0000dead0000ULL;
ctx->reg[3][0] = (u32)(local_ptr >> 32);
ctx->reg[3][1] = (u32)local_ptr;
ctx->reg[4][0] = 0xdead0000;
ctx->reg[4][1] = 0xdead0000;
#endif
ctx->ls = (u8*)malloc(LS_SIZE);
if (ctx->ls == NULL)
fail("Unable to allocate local storage.");
memset(ctx->ls, 0, LS_SIZE);
#if 0
wbe64(ctx->ls + 0x3f000, 0x100000000ULL);
wbe32(ctx->ls + 0x3f008, 0x10000);
wbe32(ctx->ls + 0x3e000, 0xff);
#endif
if (gdb_port < 0)
{
ctx->paused = 0;
}
else
{
gdb_init(gdb_port);
ctx->paused = 1;
gdb_signal(SIGABRT);
}
elf_load(elf_path);
setup_context();
done = 0;
while(done == 0)
{
if (ctx->paused == 0 || ctx->paused == 2)
done = emulate();
// data watchpoints
if (done == 2)
{
ctx->paused = 0;
gdb_signal(SIGTRAP);
done = 0;
}
if (done != 0)
{
printf("emulated() returned, sending SIGSEGV to gdb stub\n");
ctx->paused = 1;
done = gdb_signal(SIGSEGV);
}
if (done != 0)
{
#ifdef STOP_DUMP_REGS
dump_regs();
#endif
#ifdef STOP_DUMP_LS
dump_ls();
#endif
}
//if (ctx->paused == 1)
gdb_handle_events();
}
printf("emulate() returned. we're done!\n");
dump_ls();
free(ctx->ls);
gdb_deinit();
return 0;
}
int Interpreter::SingleStepInner(void)
{
static UGeckoInstruction instCode;
u32 function = m_EndBlock ? HLE::GetFunctionIndex(PC) : 0; // Check for HLE functions after branches
if (function != 0)
{
int type = HLE::GetFunctionTypeByIndex(function);
if (type == HLE::HLE_HOOK_START || type == HLE::HLE_HOOK_REPLACE)
{
int flags = HLE::GetFunctionFlagsByIndex(function);
if (HLE::IsEnabled(flags))
{
HLEFunction(function);
if (type == HLE::HLE_HOOK_START)
{
// Run the original.
function = 0;
}
}
else
{
function = 0;
}
}
}
if (function == 0)
{
#ifdef USE_GDBSTUB
if (gdb_active() && gdb_bp_x(PC)) {
Host_UpdateDisasmDialog();
gdb_signal(SIGTRAP);
gdb_handle_exception();
}
#endif
NPC = PC + sizeof(UGeckoInstruction);
instCode.hex = Memory::Read_Opcode(PC);
// Uncomment to trace the interpreter
//if ((PC & 0xffffff)>=0x0ab54c && (PC & 0xffffff)<=0x0ab624)
// startTrace = 1;
//else
// startTrace = 0;
if (startTrace)
{
Trace(instCode);
}
if (instCode.hex != 0)
{
UReg_MSR& msr = (UReg_MSR&)MSR;
if (msr.FP) //If FPU is enabled, just execute
{
m_opTable[instCode.OPCD](instCode);
if (PowerPC::ppcState.Exceptions & EXCEPTION_DSI)
{
PowerPC::CheckExceptions();
m_EndBlock = true;
}
}
else
{
// check if we have to generate a FPU unavailable exception
if (!PPCTables::UsesFPU(instCode))
{
m_opTable[instCode.OPCD](instCode);
if (PowerPC::ppcState.Exceptions & EXCEPTION_DSI)
{
PowerPC::CheckExceptions();
m_EndBlock = true;
}
}
else
{
Common::AtomicOr(PowerPC::ppcState.Exceptions, EXCEPTION_FPU_UNAVAILABLE);
PowerPC::CheckExceptions();
m_EndBlock = true;
}
}
}
else
{
// Memory exception on instruction fetch
PowerPC::CheckExceptions();
m_EndBlock = true;
}
}
last_pc = PC;
PC = NPC;
#if defined(_DEBUG) || defined(DEBUGFAST)
if (PowerPC::ppcState.gpr[1] == 0)
{
WARN_LOG(POWERPC, "%i Corrupt stack", PowerPC::ppcState.DebugCount);
}
PowerPC::ppcState.DebugCount++;
#endif
patches();
GekkoOPInfo *opinfo = GetOpInfo(instCode);
return opinfo->numCyclesMinusOne + 1;
}
int Interpreter::SingleStepInner()
{
if (HandleFunctionHooking(PC))
{
UpdatePC();
return PPCTables::GetOpInfo(m_prev_inst)->numCycles;
}
#ifdef USE_GDBSTUB
if (gdb_active() && gdb_bp_x(PC))
{
Host_UpdateDisasmDialog();
gdb_signal(GDB_SIGTRAP);
gdb_handle_exception();
}
#endif
NPC = PC + sizeof(UGeckoInstruction);
m_prev_inst.hex = PowerPC::Read_Opcode(PC);
// Uncomment to trace the interpreter
// if ((PC & 0xffffff)>=0x0ab54c && (PC & 0xffffff)<=0x0ab624)
// startTrace = 1;
// else
// startTrace = 0;
if (startTrace)
{
Trace(m_prev_inst);
}
if (m_prev_inst.hex != 0)
{
if (IsInvalidPairedSingleExecution(m_prev_inst))
{
GenerateProgramException();
CheckExceptions();
}
else if (MSR.FP)
{
m_op_table[m_prev_inst.OPCD](m_prev_inst);
if (PowerPC::ppcState.Exceptions & EXCEPTION_DSI)
{
CheckExceptions();
}
}
else
{
// check if we have to generate a FPU unavailable exception or a program exception.
if (PPCTables::UsesFPU(m_prev_inst))
{
PowerPC::ppcState.Exceptions |= EXCEPTION_FPU_UNAVAILABLE;
CheckExceptions();
}
else
{
m_op_table[m_prev_inst.OPCD](m_prev_inst);
if (PowerPC::ppcState.Exceptions & EXCEPTION_DSI)
{
CheckExceptions();
}
}
}
}
else
{
// Memory exception on instruction fetch
CheckExceptions();
}
UpdatePC();
return PPCTables::GetOpInfo(m_prev_inst)->numCycles;
}
int Interpreter::SingleStepInner()
{
if (!HandleFunctionHooking(PC))
{
#ifdef USE_GDBSTUB
if (gdb_active() && gdb_bp_x(PC))
{
Host_UpdateDisasmDialog();
gdb_signal(SIGTRAP);
gdb_handle_exception();
}
#endif
NPC = PC + sizeof(UGeckoInstruction);
m_prev_inst.hex = PowerPC::Read_Opcode(PC);
// Uncomment to trace the interpreter
// if ((PC & 0xffffff)>=0x0ab54c && (PC & 0xffffff)<=0x0ab624)
// startTrace = 1;
// else
// startTrace = 0;
if (startTrace)
{
Trace(m_prev_inst);
}
if (m_prev_inst.hex != 0)
{
if (MSR.FP) // If FPU is enabled, just execute
{
m_op_table[m_prev_inst.OPCD](m_prev_inst);
if (PowerPC::ppcState.Exceptions & EXCEPTION_DSI)
{
PowerPC::CheckExceptions();
m_end_block = true;
}
}
else
{
// check if we have to generate a FPU unavailable exception
if (!PPCTables::UsesFPU(m_prev_inst))
{
m_op_table[m_prev_inst.OPCD](m_prev_inst);
if (PowerPC::ppcState.Exceptions & EXCEPTION_DSI)
{
PowerPC::CheckExceptions();
m_end_block = true;
}
}
else
{
PowerPC::ppcState.Exceptions |= EXCEPTION_FPU_UNAVAILABLE;
PowerPC::CheckExceptions();
m_end_block = true;
}
}
}
else
{
// Memory exception on instruction fetch
PowerPC::CheckExceptions();
m_end_block = true;
}
}
last_pc = PC;
PC = NPC;
const GekkoOPInfo* opinfo = PPCTables::GetOpInfo(m_prev_inst);
return opinfo->numCycles;
}
