print_info: Use LLVM to disassemble A32

CMakeLists.txt

@@ -127,7 +127,7 @@ if (DYNARMIC_USE_LLVM)
     find_package(LLVM REQUIRED CONFIG)
     include_directories(${LLVM_INCLUDE_DIRS})
     add_definitions(-DDYNARMIC_USE_LLVM ${LLVM_DEFINITIONS})
-    llvm_map_components_to_libnames(llvm_libs aarch64desc aarch64disassembler x86desc x86disassembler)
+    llvm_map_components_to_libnames(llvm_libs armdesc armdisassembler aarch64desc aarch64disassembler x86desc x86disassembler)
 endif()
 
 if (DYNARMIC_TESTS_USE_UNICORN)

src/common/llvm_disassemble.cpp

@@ -54,6 +54,29 @@ std::string DisassembleX64(const void* begin, const void* end) {
     return result;
 }
 
+std::string DisassembleAArch32([[maybe_unused]] u32 instruction, [[maybe_unused]] u64 pc) {
+    std::string result;
+
+#ifdef DYNARMIC_USE_LLVM
+    LLVMInitializeARMTargetInfo();
+    LLVMInitializeARMTargetMC();
+    LLVMInitializeARMDisassembler();
+    LLVMDisasmContextRef llvm_ctx = LLVMCreateDisasm("armv8-arm", nullptr, 0, nullptr, nullptr);
+    LLVMSetDisasmOptions(llvm_ctx, LLVMDisassembler_Option_AsmPrinterVariant);
+
+    char buffer[80];
+    size_t inst_size = LLVMDisasmInstruction(llvm_ctx, (u8*)&instruction, sizeof(instruction), pc, buffer, sizeof(buffer));
+    result = inst_size > 0 ? buffer : "<invalid instruction>";
+    result += '\n';
+
+    LLVMDisasmDispose(llvm_ctx);
+#else
+    result += fmt::format("(disassembly disabled)\n");
+#endif
+
+    return result;
+}
+
 std::string DisassembleAArch64([[maybe_unused]] u32 instruction, [[maybe_unused]] u64 pc) {
     std::string result;
 

src/common/llvm_disassemble.h

@@ -12,6 +12,7 @@
 namespace Dynarmic::Common {
 
 std::string DisassembleX64(const void* pos, const void* end);
+std::string DisassembleAArch32(u32 instruction, u64 pc = 0);
 std::string DisassembleAArch64(u32 instruction, u64 pc = 0);
 
 } // namespace Dynarmic::Common

tests/print_info.cpp

@@ -48,7 +48,7 @@ const char* GetNameOfA64Instruction(u32 instruction) {
 }
 
 void PrintA32Instruction(u32 instruction) {
-    fmt::print("{:08x} {}\n", instruction, A32::DisassembleArm(instruction));
+    fmt::print("{:08x} {}\n", instruction, Common::DisassembleAArch32(instruction));
     fmt::print("Name: {}\n", GetNameOfA32Instruction(instruction));
 
     const A32::LocationDescriptor location{0, {}, {}};