Merge yuzu-emu#12915

src/core/memory/cheat_engine.cpp

@@ -9,6 +9,7 @@
 #include "core/core_timing.h"
 #include "core/hle/kernel/k_page_table.h"
 #include "core/hle/kernel/k_process.h"
+#include "core/hle/kernel/k_process_page_table.h"
 #include "core/hle/service/hid/hid_server.h"
 #include "core/hle/service/sm/sm.h"
 #include "core/memory.h"
@@ -85,8 +86,12 @@ VAddr StandardVmCallbacks::SanitizeAddress(VAddr in) const {
     if ((in < metadata.main_nso_extents.base ||
          in >= metadata.main_nso_extents.base + metadata.main_nso_extents.size) &&
         (in < metadata.heap_extents.base ||
-         in >= metadata.heap_extents.base + metadata.heap_extents.size)) {
+         in >= metadata.heap_extents.base + metadata.heap_extents.size) &&
-        LOG_ERROR(CheatEngine,
+        (in < metadata.alias_extents.base ||
+         in >= metadata.heap_extents.base + metadata.alias_extents.size) &&
+        (in < metadata.aslr_extents.base ||
+         in >= metadata.heap_extents.base + metadata.aslr_extents.size)) {
+        LOG_DEBUG(CheatEngine,
                   "Cheat attempting to access memory at invalid address={:016X}, if this "
                   "persists, "
                   "the cheat may be incorrect. However, this may be normal early in execution if "
@@ -211,16 +216,14 @@ void CheatEngine::Initialize() {
         .base = GetInteger(page_table.GetHeapRegionStart()),
         .size = page_table.GetHeapRegionSize(),
     };
-
+    metadata.aslr_extents = {
-    metadata.address_space_extents = {
-        .base = GetInteger(page_table.GetAddressSpaceStart()),
-        .size = page_table.GetAddressSpaceSize(),
-    };
-
-    metadata.alias_extents = {
         .base = GetInteger(page_table.GetAliasCodeRegionStart()),
         .size = page_table.GetAliasCodeRegionSize(),
     };
+    metadata.alias_extents = {
+        .base = GetInteger(page_table.GetAliasRegionStart()),
+        .size = page_table.GetAliasRegionSize(),
+    };
 
     is_pending_reload.exchange(true);
 }

src/core/memory/cheat_engine.h

@@ -37,7 +37,7 @@ private:
     VAddr SanitizeAddress(VAddr address) const;
 
     const CheatProcessMetadata& metadata;
-    System& system;
+    Core::System& system;
 };
 
 // Intermediary class that parses a text file or other disk format for storing cheats into a

src/core/memory/dmnt_cheat_types.h

@@ -18,7 +18,7 @@ struct CheatProcessMetadata {
     MemoryRegionExtents main_nso_extents{};
     MemoryRegionExtents heap_extents{};
     MemoryRegionExtents alias_extents{};
-    MemoryRegionExtents address_space_extents{};
+    MemoryRegionExtents aslr_extents{};
     std::array<u8, 0x20> main_nso_build_id{};
 };
 

src/core/memory/dmnt_cheat_vm.cpp

@@ -322,8 +322,9 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
     } break;
     case CheatVmOpcodeType::EndConditionalBlock: {
         // 20000000
-        // There's actually nothing left to process here!
+        opcode.opcode = EndConditionalOpcode{
-        opcode.opcode = EndConditionalOpcode{};
+            .is_else = ((first_dword >> 24) & 0xf) == 1,
+        };
     } break;
     case CheatVmOpcodeType::ControlLoop: {
         // 300R0000 VVVVVVVV
@@ -555,6 +556,18 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
             .idx = first_dword & 0xF,
         };
     } break;
+    case CheatVmOpcodeType::PauseProcess: {
+        /* FF0????? */
+        /* FF0 = opcode 0xFF0 */
+        /* Pauses the current process. */
+        opcode.opcode = PauseProcessOpcode{};
+    } break;
+    case CheatVmOpcodeType::ResumeProcess: {
+        /* FF0????? */
+        /* FF0 = opcode 0xFF0 */
+        /* Pauses the current process. */
+        opcode.opcode = ResumeProcessOpcode{};
+    } break;
     case CheatVmOpcodeType::DebugLog: {
         // FFFTIX##
         // FFFTI0Ma aaaaaaaa
@@ -621,7 +634,7 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
     return valid;
 }
 
-void DmntCheatVm::SkipConditionalBlock() {
+void DmntCheatVm::SkipConditionalBlock(bool is_if) {
     if (condition_depth > 0) {
         // We want to continue until we're out of the current block.
         const std::size_t desired_depth = condition_depth - 1;
@@ -637,8 +650,12 @@ void DmntCheatVm::SkipConditionalBlock() {
             // We also support nesting of conditional blocks, and Gateway does not.
             if (skip_opcode.begin_conditional_block) {
                 condition_depth++;
-            } else if (std::holds_alternative<EndConditionalOpcode>(skip_opcode.opcode)) {
+            } else if (auto end_cond = std::get_if<EndConditionalOpcode>(&skip_opcode.opcode)) {
+                if (!end_cond->is_else) {
                     condition_depth--;
+                } else if (is_if && condition_depth - 1 == desired_depth) {
+                    break;
+                }
             }
         }
     } else {
@@ -675,6 +692,10 @@ u64 DmntCheatVm::GetCheatProcessAddress(const CheatProcessMetadata& metadata,
         return metadata.main_nso_extents.base + rel_address;
     case MemoryAccessType::Heap:
         return metadata.heap_extents.base + rel_address;
+    case MemoryAccessType::Alias:
+        return metadata.alias_extents.base + rel_address;
+    case MemoryAccessType::Aslr:
+        return metadata.aslr_extents.base + rel_address;
     }
 }
 
@@ -682,7 +703,6 @@ void DmntCheatVm::ResetState() {
     registers.fill(0);
     saved_values.fill(0);
     loop_tops.fill(0);
-    static_registers.fill(0);
     instruction_ptr = 0;
     condition_depth = 0;
     decode_success = true;
@@ -794,14 +814,19 @@ void DmntCheatVm::Execute(const CheatProcessMetadata& metadata) {
             }
             // Skip conditional block if condition not met.
             if (!cond_met) {
-                SkipConditionalBlock();
+                SkipConditionalBlock(true);
             }
-        } else if (std::holds_alternative<EndConditionalOpcode>(cur_opcode.opcode)) {
+        } else if (auto end_cond = std::get_if<EndConditionalOpcode>(&cur_opcode.opcode)) {
-            // Decrement the condition depth.
+            if (end_cond->is_else) {
-            // We will assume, graciously, that mismatched conditional block ends are a nop.
+                /* Skip to the end of the conditional block. */
+                this->SkipConditionalBlock(false);
+            } else {
+                /* Decrement the condition depth. */
+                /* We will assume, graciously, that mismatched conditional block ends are a nop. */
                 if (condition_depth > 0) {
                     condition_depth--;
                 }
+            }
         } else if (auto ctrl_loop = std::get_if<ControlLoopOpcode>(&cur_opcode.opcode)) {
             if (ctrl_loop->start_loop) {
                 // Start a loop.
@@ -908,7 +933,7 @@ void DmntCheatVm::Execute(const CheatProcessMetadata& metadata) {
             // Check for keypress.
             if ((begin_keypress_cond->key_mask & kDown) != begin_keypress_cond->key_mask) {
                 // Keys not pressed. Skip conditional block.
-                SkipConditionalBlock();
+                SkipConditionalBlock(true);
             }
         } else if (auto perform_math_reg =
                        std::get_if<PerformArithmeticRegisterOpcode>(&cur_opcode.opcode)) {
@@ -1116,7 +1141,7 @@ void DmntCheatVm::Execute(const CheatProcessMetadata& metadata) {
 
             // Skip conditional block if condition not met.
             if (!cond_met) {
-                SkipConditionalBlock();
+                SkipConditionalBlock(true);
             }
         } else if (auto save_restore_reg =
                        std::get_if<SaveRestoreRegisterOpcode>(&cur_opcode.opcode)) {
@@ -1178,6 +1203,10 @@ void DmntCheatVm::Execute(const CheatProcessMetadata& metadata) {
                 // Store a register to a static register.
                 static_registers[rw_static_reg->static_idx] = registers[rw_static_reg->idx];
             }
+        } else if (std::holds_alternative<PauseProcessOpcode>(cur_opcode.opcode)) {
+            // TODO: Pause cheat process
+        } else if (std::holds_alternative<ResumeProcessOpcode>(cur_opcode.opcode)) {
+            // TODO: Resume cheat process
         } else if (auto debug_log = std::get_if<DebugLogOpcode>(&cur_opcode.opcode)) {
             // Read value from memory.
             u64 log_value = 0;

src/core/memory/dmnt_cheat_vm.h

@@ -42,12 +42,16 @@ enum class CheatVmOpcodeType : u32 {
     DoubleExtendedWidth = 0xF0,
 
     // Double-extended width opcodes.
+    PauseProcess = 0xFF0,
+    ResumeProcess = 0xFF1,
     DebugLog = 0xFFF,
 };
 
 enum class MemoryAccessType : u32 {
     MainNso = 0,
     Heap = 1,
+    Alias = 2,
+    Aslr = 3,
 };
 
 enum class ConditionalComparisonType : u32 {
@@ -131,7 +135,9 @@ struct BeginConditionalOpcode {
     VmInt value{};
 };
 
-struct EndConditionalOpcode {};
+struct EndConditionalOpcode {
+    bool is_else;
+};
 
 struct ControlLoopOpcode {
     bool start_loop{};
@@ -222,6 +228,10 @@ struct ReadWriteStaticRegisterOpcode {
     u32 idx{};
 };
 
+struct PauseProcessOpcode {};
+
+struct ResumeProcessOpcode {};
+
 struct DebugLogOpcode {
     u32 bit_width{};
     u32 log_id{};
@@ -244,8 +254,8 @@ struct CheatVmOpcode {
                  PerformArithmeticStaticOpcode, BeginKeypressConditionalOpcode,
                  PerformArithmeticRegisterOpcode, StoreRegisterToAddressOpcode,
                  BeginRegisterConditionalOpcode, SaveRestoreRegisterOpcode,
-                 SaveRestoreRegisterMaskOpcode, ReadWriteStaticRegisterOpcode, DebugLogOpcode,
+                 SaveRestoreRegisterMaskOpcode, ReadWriteStaticRegisterOpcode, PauseProcessOpcode,
-                 UnrecognizedInstruction>
+                 ResumeProcessOpcode, DebugLogOpcode, UnrecognizedInstruction>
         opcode{};
 };
 
@@ -296,7 +306,7 @@ private:
     std::array<std::size_t, NumRegisters> loop_tops{};
 
     bool DecodeNextOpcode(CheatVmOpcode& out);
-    void SkipConditionalBlock();
+    void SkipConditionalBlock(bool is_if);
     void ResetState();
 
     // For implementing the DebugLog opcode.