lldb/unittests/Disassembler/TestArmv7Disassembly.cpp

   1 //===-- TestArmv7Disassembly.cpp ------------------------------------*- C++
   2 //-*-===//
   3
   4 //
   5 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   6 // See https://llvm.org/LICENSE.txt for license information.
   7 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   8 //
   9 //===----------------------------------------------------------------------===//
  10
  11 #include "gtest/gtest.h"
  12
  13 #include "lldb/Core/Address.h"
  14 #include "lldb/Core/Disassembler.h"
  15 #include "lldb/Utility/ArchSpec.h"
  16 #include "lldb/Target/ExecutionContext.h"
  17
  18 #include "Plugins/Disassembler/LLVMC/DisassemblerLLVMC.h"
  19 #include "llvm/Support/TargetSelect.h"
  20
  21 using namespace lldb;
  22 using namespace lldb_private;
  23
  24 class TestArmv7Disassembly : public testing::Test {
  25 public:
  26   static void SetUpTestCase();
  27   static void TearDownTestCase();
  28
  29   //  virtual void SetUp() override { }
  30   //  virtual void TearDown() override { }
  31
  32 protected:
  33 };
  34
  35 void TestArmv7Disassembly::SetUpTestCase() {
  36   llvm::InitializeAllTargets();
  37   llvm::InitializeAllAsmPrinters();
  38   llvm::InitializeAllTargetMCs();
  39   llvm::InitializeAllDisassemblers();
  40   DisassemblerLLVMC::Initialize();
  41 }
  42
  43 void TestArmv7Disassembly::TearDownTestCase() {
  44   DisassemblerLLVMC::Terminate();
  45 }
  46
  47 TEST_F(TestArmv7Disassembly, TestCortexFPDisass) {
  48   ArchSpec arch("armv7em--");
  49
  50   const unsigned num_of_instructions = 3;
  51   uint8_t data[] = {
  52       0x00, 0xee, 0x10, 0x2a, // 0xee002a10 :  vmov   s0, r2
  53       0xb8, 0xee, 0xc0, 0x0b, // 0xeeb80bc0 :  vcvt.f64.s32 d0, s0
  54       0xb6, 0xee, 0x00, 0x0a, // 0xeeb60a00 :  vmov.f32 s0, #5.000000e-01
  55   };
  56
  57   // these can be disassembled by hand with llvm-mc, e.g.
  58   //
  59   // 0x00, 0xee, 0x10, 0x2a, // 0xee002a10 :  vmov   s0, r2
  60   //
  61   // echo 0x00 0xee 0x10  0x2a | llvm-mc -arch thumb -disassemble -mattr=+fp-armv8
  62         //       vmov s0, r2
  63
  64   DisassemblerSP disass_sp;
  65   Address start_addr(0x100);
  66   disass_sp = Disassembler::DisassembleBytes(arch, nullptr, nullptr, start_addr,
  67                                  &data, sizeof (data), num_of_instructions, false);
  68
  69   // If we failed to get a disassembler, we can assume it is because
  70   // the llvm we linked against was not built with the ARM target,
  71   // and we should skip these tests without marking anything as failing.
  72
  73   if (disass_sp) {
  74     const InstructionList inst_list (disass_sp->GetInstructionList());
  75     EXPECT_EQ (num_of_instructions, inst_list.GetSize());
  76
  77     InstructionSP inst_sp;
  78     const char *mnemonic;
  79     ExecutionContext exe_ctx (nullptr, nullptr, nullptr);
  80     inst_sp = inst_list.GetInstructionAtIndex (0);
  81     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
  82     ASSERT_STREQ ("vmov", mnemonic);
  83
  84     inst_sp = inst_list.GetInstructionAtIndex (1);
  85     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
  86     ASSERT_STREQ ("vcvt.f64.s32", mnemonic);
  87
  88     inst_sp = inst_list.GetInstructionAtIndex (2);
  89     mnemonic = inst_sp->GetMnemonic(&exe_ctx);
  90     ASSERT_STREQ ("vmov.f32", mnemonic);
  91   }
  92 }