Initial commit

src/common/virtualMemory.cpp

@@ -0,0 +1,82 @@
+#include "common/virtualMemory.h"
+
+#include "common/platform/sysVirtual.h"
+
+namespace Common {
+
+namespace VirtualMemory {
+
+void Init() {
+	SysVirtualInit();
+}
+
+uint64_t Alloc(uint64_t address, uint64_t size, Mode mode) {
+	return SysVirtualAlloc(address, size, mode);
+}
+
+uint64_t AllocAligned(uint64_t address, uint64_t size, Mode mode, uint64_t alignment) {
+	return SysVirtualAllocAligned(address, size, mode, alignment);
+}
+
+bool AllocFixed(uint64_t address, uint64_t size, Mode mode) {
+	return SysVirtualAllocFixed(address, size, mode);
+}
+
+bool Commit(uint64_t address, uint64_t size, Mode mode) {
+	return SysVirtualCommit(address, size, mode);
+}
+
+uint64_t Reserve(uint64_t address, uint64_t size) {
+	return SysVirtualReserve(address, size);
+}
+
+uint64_t ReserveAligned(uint64_t address, uint64_t size, uint64_t alignment) {
+	return SysVirtualReserveAligned(address, size, alignment);
+}
+
+bool ReserveFixed(uint64_t address, uint64_t size) {
+	return SysVirtualReserveFixed(address, size);
+}
+
+bool Decommit(uint64_t address, uint64_t size) {
+	return SysVirtualDecommit(address, size);
+}
+
+bool Free(uint64_t address) {
+	return SysVirtualFree(address);
+}
+
+bool FreeRange(uint64_t address, uint64_t size) {
+	return SysVirtualFreeRange(address, size);
+}
+
+bool Protect(uint64_t address, uint64_t size, Mode mode, Mode* old_mode) {
+	return SysVirtualProtect(address, size, mode, old_mode);
+}
+
+bool FlushInstructionCache(uint64_t address, uint64_t size) {
+	return SysVirtualFlushInstructionCache(address, size);
+}
+
+bool PatchReplace(uint64_t vaddr, uint64_t value) {
+	Mode old_mode {};
+	Protect(vaddr, 8, Mode::ReadWrite, &old_mode);
+
+	auto* ptr = reinterpret_cast<uint64_t*>(vaddr);
+
+	bool ret = (*ptr != value);
+
+	*ptr = value;
+
+	Protect(vaddr, 8, old_mode);
+
+	if (IsExecute(old_mode)) {
+		FlushInstructionCache(vaddr, 8);
+	}
+
+	return ret;
+}
+
+} // namespace VirtualMemory
+
+} // namespace Common