ARMv7 decoder reworked (needs more testing / fixes / optimisations). TODO: implement new ARMv7 disassembler (currently ARMv7DisAsm fully disabled), add 0x0 opcodes group.

rpcs3/Emu/ARMv7/ARMv7Decoder.h

@@ -1,35 +1,48 @@
 #pragma once
-#include "Emu/CPU/CPUDecoder.h"
-#include "ARMv7Opcodes.h"
 
+#include "Emu/CPU/CPUDecoder.h"
+#include "ARMv7Thread.h"
+#include "ARMv7Interpreter.h"
+#include "ARMv7Opcodes.h"
+#include "Utilities/Log.h"
 
 class ARMv7Decoder : public CPUDecoder
 {
-	ARMv7Opcodes& m_op;
+	ARMv7Thread& m_thr;
-	u8 m_last_instr_size;
 
 public:
-	ARMv7Decoder(ARMv7Opcodes& op) : m_op(op)
+	ARMv7Decoder(ARMv7Thread& thr) : m_thr(thr)
 	{
 	}
 
 	virtual u8 DecodeMemory(const u32 address)
 	{
-		const u32 code0 = vm::psv::read16(address & ~1);
+		m_thr.update_code(address & ~1);
-		const u32 code1 = vm::psv::read16(address + 2 & ~1);
-		const u32 data = code0 << 16 | code1;
-		const u32 arg = address & 1 ? code1 << 16 | code0 : data;
 
+		// LOG_NOTICE(GENERAL, "code0 = 0x%04x, code1 = 0x%04x, data = 0x%08x", m_thr.code.code0, m_thr.code.code1, m_thr.code.data);
+		// LOG_NOTICE(GENERAL, "arg = 0x%08x", m_thr.m_arg);
+		// Emu.Pause();
+
+		// old decoding algorithm
+		/*
 		for (auto& opcode : ARMv7_opcode_table)
 		{
-			if ((opcode.type < A1) == ((address & 1) == 0) && (arg & opcode.mask) == opcode.code)
+			if ((opcode.type < A1) == ((address & 0x1) == 0) && (m_thr.m_arg & opcode.mask) == opcode.code)
 			{
-				(m_op.*opcode.func)(opcode.length == 2 ? code0 : arg, opcode.type);
+				m_thr.code.data = opcode.length == 2 ? m_thr.code.code0 : m_thr.m_arg;
+				(*opcode.func)(&m_thr, opcode.type);
+				// LOG_NOTICE(GENERAL, "%s, %d \n\n", opcode.name, opcode.length);
 				return opcode.length;
 			}
 		}
 
-		m_op.UNK(data);
+		ARMv7_instrs::UNK(&m_thr);
-		return address & 1 ? 4 : 2;
+		return address & 0x1 ? 4 : 2;
+		*/
+
+		execute_main_group(&m_thr);
+		LOG_NOTICE(GENERAL, "%s, %d \n\n", m_thr.m_last_instr_name, m_thr.m_last_instr_size);
+		m_thr.m_last_instr_name = "Unknown";
+		return m_thr.m_last_instr_size;
 	}
-};
+};

rpcs3/Emu/ARMv7/ARMv7DisAsm.h

@@ -12,10 +12,9 @@ static const char* g_arm_cond_name[16] =
 
 class ARMv7DisAsm
 	: public CPUDisAsm
-	, public ARMv7Opcodes
 {
 public:
-	ARMv7DisAsm(CPUDisAsmMode mode) : CPUDisAsm(mode)
+	ARMv7DisAsm() : CPUDisAsm(CPUDisAsm_InterpreterMode)
 	{
 	}
 

rpcs3/Emu/ARMv7/ARMv7Thread.cpp

@@ -10,7 +10,11 @@
 #include "ARMv7DisAsm.h"
 #include "ARMv7Interpreter.h"
 
-ARMv7Thread::ARMv7Thread() : CPUThread(CPU_THREAD_ARMv7)
+ARMv7Thread::ARMv7Thread()
+	: CPUThread(CPU_THREAD_ARMv7)
+	, m_arg(0)
+	, m_last_instr_size(0)
+	, m_last_instr_name("UNK")
 {
 }
 
@@ -81,7 +85,7 @@ void ARMv7Thread::DoRun()
 
 	case 1:
 	case 2:
-		m_dec = new ARMv7Decoder(*new ARMv7Interpreter(*this));
+		m_dec = new ARMv7Decoder(*this);
 	break;
 	}
 }

rpcs3/Emu/ARMv7/ARMv7Thread.h

@@ -1,17 +1,23 @@
 #pragma once
+
 #include "Emu/CPU/CPUThread.h"
+#include "Emu/Memory/Memory.h"
 
 enum ARMv7InstructionSet
 {
 	ARM,
 	Thumb,
 	Jazelle,
-	ThumbEE,
+	ThumbEE
 };
 
 class ARMv7Thread : public CPUThread
 {
 public:
+	u32 m_arg;
+	u8 m_last_instr_size;
+	const char* m_last_instr_name;
+
 	ARMv7Thread();
 
 	union
@@ -61,6 +67,18 @@ public:
 
 	} IPSR;
 
+	union
+	{
+		struct
+		{
+			u32 code1 : 16;
+			u32 code0 : 16;
+		};
+
+		u32 data;
+
+	} code;
+
 	ARMv7InstructionSet ISET;
 
 	union
@@ -119,6 +137,13 @@ public:
 		return PC;
 	}
 
+	void update_code(const u32 address)
+	{
+		code.code0 = vm::psv::read16(address & ~1);
+		code.code1 = vm::psv::read16(address + 2 & ~1);
+		m_arg = address & 0x1 ? code.code1 << 16 | code.code0 : code.data;
+	}
+
 public:
 	virtual void InitRegs(); 
 	virtual void InitStack();

rpcs3/Gui/InterpreterDisAsm.cpp

@@ -112,7 +112,8 @@ void InterpreterDisAsmFrame::UpdateUnitList()
 
 	for(uint i=0; i<thrs.size(); ++i)
 	{
-		m_choice_units->Append(thrs[i]->GetFName(), thrs[i]);
+		if (thrs[i]->GetType() != CPU_THREAD_ARMv7)
+			m_choice_units->Append(thrs[i]->GetFName(), thrs[i]);
 	}
 
 	m_choice_units->Thaw();
@@ -150,9 +151,9 @@ void InterpreterDisAsmFrame::OnSelectUnit(wxCommandEvent& event)
 
 		case CPU_THREAD_ARMv7:
 		{
-			ARMv7DisAsm& dis_asm = *new ARMv7DisAsm(CPUDisAsm_InterpreterMode);
+			//ARMv7DisAsm& dis_asm = *new ARMv7DisAsm(CPUDisAsm_InterpreterMode);
-			decoder = new ARMv7Decoder(dis_asm);
+			//decoder = new ARMv7Decoder(dis_asm);
-			disasm = &dis_asm;
+			//disasm = &dis_asm;
 		}
 		break;
 		}

rpcs3/Loader/Loader.cpp

@@ -10,14 +10,19 @@ namespace loader
 	{
 		for (auto i : m_handlers)
 		{
-			if (i->init(stream) == handler::ok)
+			i->set_status(i->init(stream));
+			if (i->get_status() == handler::ok)
 			{
-				if (i->load() == handler::ok)
+				i->set_status(i->load());
+				if (i->get_status() == handler::ok)
 				{
 					return true;
 				}
+
+				LOG_ERROR(LOADER, "loader::load() failed: %s", i->get_error_code().c_str());
 			}
 
+			LOG_ERROR(LOADER, "loader::init() failed: %s", i->get_error_code().c_str());
 			stream.Seek(i->get_stream_offset());
 		}
 

rpcs3/Loader/Loader.h

@@ -15,7 +15,7 @@ enum Elf_Machine
 	MACHINE_MIPS = 0x08,
 	MACHINE_PPC64 = 0x15,
 	MACHINE_SPU = 0x17,
-	MACHINE_ARM = 0x28,
+	MACHINE_ARM = 0x28
 };
 
 enum ShdrType
@@ -31,7 +31,7 @@ enum ShdrType
 	SHT_NOBITS,
 	SHT_REL,
 	SHT_SHLIB,
-	SHT_DYNSYM,
+	SHT_DYNSYM
 };
 
 enum ShdrFlag
@@ -39,7 +39,7 @@ enum ShdrFlag
 	SHF_WRITE     = 0x1,
 	SHF_ALLOC     = 0x2,
 	SHF_EXECINSTR = 0x4,
-	SHF_MASKPROC  = 0xf0000000,
+	SHF_MASKPROC  = 0xf0000000
 };
 
 const std::string Ehdr_DataToString(const u8 data);
@@ -117,7 +117,7 @@ namespace loader
 			broken_file = -3,
 			loading_error = -4,
 			bad_relocation_type = -5,
-			ok = 0,
+			ok = 0
 		};
 
 		virtual ~handler() = default;
@@ -128,6 +128,34 @@ namespace loader
 		{
 			return m_stream_offset;
 		}
+
+		void set_status(const error_code& code)
+		{
+			m_status = code;
+		}
+
+		error_code get_status() const
+		{
+			return m_status;
+		}
+
+		const std::string get_error_code() const
+		{
+			switch (m_status)
+			{
+			case bad_version: return "Bad version";
+			case bad_file: return "Bad file";
+			case broken_file: return "Broken file";
+			case loading_error: return "Loading error";
+			case bad_relocation_type: return "Bad relocation type";
+			case ok: return "Ok";
+
+			default: return "Unknown error code";
+			}
+		}
+
+	protected:
+		error_code m_status;
 	};
 
 	class loader