lldb/unittests/Disassembler/ARM/TestArmv7Disassembly.cpp

   1 //===-- TestArmv7Disassembly.cpp ------------------------------------------===//
   2
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "gtest/gtest.h"
  11
  12 #include "lldb/Core/Address.h"
  13 #include "lldb/Core/Disassembler.h"
  14 #include "lldb/Utility/ArchSpec.h"
  15 #include "lldb/Target/ExecutionContext.h"
  16
  17 #include "Plugins/Disassembler/LLVMC/DisassemblerLLVMC.h"
  18 #include "llvm/Support/TargetSelect.h"
  19
  20 using namespace lldb;
  21 using namespace lldb_private;
  22
  23 class TestArmv7Disassembly : public testing::Test {
  24 public:
  25   static void SetUpTestCase();
  26   static void TearDownTestCase();
  27
  28   //  virtual void SetUp() override { }
  29   //  virtual void TearDown() override { }
  30
  31 protected:
  32 };
  33
  34 void TestArmv7Disassembly::SetUpTestCase() {
  35   llvm::InitializeAllTargets();
  36   llvm::InitializeAllAsmPrinters();
  37   llvm::InitializeAllTargetMCs();
  38   llvm::InitializeAllDisassemblers();
  39   DisassemblerLLVMC::Initialize();
  40 }
  41
  42 void TestArmv7Disassembly::TearDownTestCase() {
  43   DisassemblerLLVMC::Terminate();
  44 }
  45
  46 TEST_F(TestArmv7Disassembly, TestCortexFPDisass) {
  47   ArchSpec arch("armv7em--");
  48
  49   const unsigned num_of_instructions = 3;
  50   uint8_t data[] = {
  51       0x00, 0xee, 0x10, 0x2a, // 0xee002a10 :  vmov   s0, r2
  52       0xb8, 0xee, 0xc0, 0x0b, // 0xeeb80bc0 :  vcvt.f64.s32 d0, s0
  53       0xb6, 0xee, 0x00, 0x0a, // 0xeeb60a00 :  vmov.f32 s0, #5.000000e-01
  54   };
  55
  56   // these can be disassembled by hand with llvm-mc, e.g.
  57   //
  58   // 0x00, 0xee, 0x10, 0x2a, // 0xee002a10 :  vmov   s0, r2
  59   //
  60   // echo 0x00 0xee 0x10  0x2a | llvm-mc -arch thumb -disassemble -mattr=+fp-armv8
  61         //       vmov s0, r2
  62
  63   DisassemblerSP disass_sp;
  64   Address start_addr(0x100);
  65   disass_sp = Disassembler::DisassembleBytes(arch, nullptr, nullptr, start_addr,
  66                                  &data, sizeof (data), num_of_instructions, false);
  67
  68   // If we failed to get a disassembler, we can assume it is because
  69   // the llvm we linked against was not built with the ARM target,
  70   // and we should skip these tests without marking anything as failing.
  71
  72   if (disass_sp) {
  73     const InstructionList inst_list (disass_sp->GetInstructionList());
  74     EXPECT_EQ (num_of_instructions, inst_list.GetSize());
  75
  76     InstructionSP inst_sp;
  77     const char *mnemonic;
  78     ExecutionContext exe_ctx (nullptr, nullptr, nullptr);
  79     inst_sp = inst_list.GetInstructionAtIndex (0);
  80     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
  81     ASSERT_STREQ ("vmov", mnemonic);
  82
  83     inst_sp = inst_list.GetInstructionAtIndex (1);
  84     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
  85     ASSERT_STREQ ("vcvt.f64.s32", mnemonic);
  86
  87     inst_sp = inst_list.GetInstructionAtIndex (2);
  88     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
  89     ASSERT_STREQ ("vmov.f32", mnemonic);
  90   }
  91 }