A include/mgba/internal/lr35902/debugger/memory-debugger.h

@@ -0,0 +1,20 @@
+/* Copyright (c) 2013-2017 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef LR35902_MEMORY_DEBUGGER_H
+#define LR35902_MEMORY_DEBUGGER_H
+
+#include <mgba-util/common.h>
+
+CXX_GUARD_START
+
+struct LR35902Debugger;
+
+void LR35902DebuggerInstallMemoryShim(struct LR35902Debugger* debugger);
+void LR35902DebuggerRemoveMemoryShim(struct LR35902Debugger* debugger);
+
+CXX_GUARD_END
+
+#endif

A src/lr35902/debugger/memory-debugger.c

@@ -0,0 +1,70 @@
+/* Copyright (c) 2013-2017 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include <mgba/internal/lr35902/debugger/memory-debugger.h>
+
+#include <mgba/internal/lr35902/debugger/debugger.h>
+
+#include <mgba-util/math.h>
+
+#include <string.h>
+
+static bool _checkWatchpoints(struct LR35902Debugger* debugger, uint16_t address, struct mDebuggerEntryInfo* info, enum mWatchpointType type, uint8_t newValue);
+
+#define FIND_DEBUGGER(DEBUGGER, CPU) \
+	do { \
+		DEBUGGER = 0; \
+		size_t i; \
+		for (i = 0; i < CPU->numComponents; ++i) { \
+			if (CPU->components[i]->id == DEBUGGER_ID) { \
+				DEBUGGER = (struct LR35902Debugger*) ((struct mDebugger*) cpu->components[i])->platform; \
+				goto debuggerFound; \
+			} \
+		} \
+		abort(); \
+		debuggerFound: break; \
+	} while(0)
+
+#define CREATE_WATCHPOINT_SHIM(NAME, RW, RETURN, TYPES, ...) \
+	static RETURN DebuggerShim_ ## NAME TYPES { \
+		struct LR35902Debugger* debugger; \
+		FIND_DEBUGGER(debugger, cpu); \
+		struct mDebuggerEntryInfo info; \
+		if (_checkWatchpoints(debugger, address, &info, WATCHPOINT_ ## RW, 0)) { \
+			mDebuggerEnter(debugger->d.p, DEBUGGER_ENTER_WATCHPOINT, &info); \
+		} \
+		return debugger->originalMemory.NAME(cpu, __VA_ARGS__); \
+	}
+
+CREATE_WATCHPOINT_SHIM(load8, READ, uint8_t, (struct LR35902Core* cpu, uint16_t address), address)
+CREATE_WATCHPOINT_SHIM(store8, WRITE, void, (struct LR35902Core* cpu, uint16_t address, int8_t value), address, value)
+
+static bool _checkWatchpoints(struct LR35902Debugger* debugger, uint16_t address, struct mDebuggerEntryInfo* info, enum mWatchpointType type, uint8_t newValue) {
+	struct LR35902DebugWatchpoint* watchpoint;
+	size_t i;
+	for (i = 0; i < LR35902DebugWatchpointListSize(&debugger->watchpoints); ++i) {
+		watchpoint = LR35902DebugWatchpointListGetPointer(&debugger->watchpoints, i);
+		if (watchpoint->address == address && (watchpoint->segment < 0 || watchpoint->segment == debugger->originalMemory.currentSegment(debugger->cpu, address)) && watchpoint->type & type) {
+			info->oldValue = debugger->originalMemory.load8(debugger->cpu, address);
+			info->newValue = newValue;
+			info->address = address;
+			info->watchType = watchpoint->type;
+			info->accessType = type;
+			return true;
+		}
+	}
+	return false;
+}
+
+void LR35902DebuggerInstallMemoryShim(struct LR35902Debugger* debugger) {
+	debugger->originalMemory = debugger->cpu->memory;
+	debugger->cpu->memory.store8 = DebuggerShim_store8;
+	debugger->cpu->memory.load8 = DebuggerShim_load8;
+}
+
+void LR35902DebuggerRemoveMemoryShim(struct LR35902Debugger* debugger) {
+	debugger->cpu->memory.store8 = debugger->originalMemory.store8;
+	debugger->cpu->memory.load8 = debugger->originalMemory.load8;
+}