courgette/typedrva_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "courgette/base_test_unittest.h"
   6 #include "courgette/disassembler_elf_32_arm.h"
   7 #include "courgette/disassembler_elf_32_x86.h"
   8
   9 class TypedRVATest : public BaseTest {
  10  public:
  11   void TestRelativeTargetX86(courgette::RVA word, courgette::RVA expected)
  12     const;
  13
  14   void TestRelativeTargetARM(courgette::ARM_RVA arm_rva,
  15                              courgette::RVA rva,
  16                              uint32 op,
  17                              courgette::RVA expected) const;
  18
  19   void TestARMOPEncode(courgette::ARM_RVA arm_rva,
  20                        courgette::RVA rva,
  21                        uint32 op,
  22                        courgette::RVA expected) const;
  23 };
  24
  25 void TypedRVATest::TestRelativeTargetX86(courgette::RVA word,
  26                                          courgette::RVA expected) const {
  27   courgette::DisassemblerElf32X86::TypedRVAX86* typed_rva
  28     = new courgette::DisassemblerElf32X86::TypedRVAX86(0);
  29   const uint8* op_pointer = reinterpret_cast<const uint8*>(&word);
  30
  31   EXPECT_TRUE(typed_rva->ComputeRelativeTarget(op_pointer));
  32   EXPECT_EQ(typed_rva->relative_target(), expected);
  33
  34   delete typed_rva;
  35 }
  36
  37 uint32 Read32LittleEndian(const void* address) {
  38   return *reinterpret_cast<const uint32*>(address);
  39 }
  40
  41 void TypedRVATest::TestRelativeTargetARM(courgette::ARM_RVA arm_rva,
  42                                          courgette::RVA rva,
  43                                          uint32 op,
  44                                          courgette::RVA expected) const {
  45   courgette::DisassemblerElf32ARM::TypedRVAARM* typed_rva
  46     = new courgette::DisassemblerElf32ARM::TypedRVAARM(arm_rva, rva);
  47   uint8* op_pointer = reinterpret_cast<uint8*>(&op);
  48
  49   EXPECT_TRUE(typed_rva->ComputeRelativeTarget(op_pointer));
  50   EXPECT_EQ(rva + typed_rva->relative_target(), expected);
  51
  52   delete typed_rva;
  53 }
  54
  55 void TypedRVATest::TestARMOPEncode(courgette::ARM_RVA arm_rva,
  56                              courgette::RVA rva,
  57                              uint32 op,
  58                              courgette::RVA expected) const {
  59   uint16 c_op;
  60   uint32 addr;
  61   EXPECT_TRUE(courgette::DisassemblerElf32ARM::Compress(arm_rva, op, rva,
  62                                                         &c_op, &addr));
  63   EXPECT_EQ(rva + addr, expected);
  64
  65   uint32 new_op;
  66   EXPECT_TRUE(courgette::DisassemblerElf32ARM::Decompress(arm_rva, c_op, addr,
  67                                                           &new_op));
  68   EXPECT_EQ(new_op, op);
  69 }
  70
  71 TEST_F(TypedRVATest, TestX86) {
  72   TestRelativeTargetX86(0x0, 0x4);
  73 }
  74
  75 // ARM opcodes taken from and tested against the output of
  76 // "arm-linux-gnueabi-objdump -d daisy_3701.98.0/bin/ls"
  77
  78 TEST_F(TypedRVATest, TestARM_OFF8_PREFETCH) {
  79   TestRelativeTargetARM(courgette::ARM_OFF8, 0x0, 0x0, 0x4);
  80 }
  81
  82 TEST_F(TypedRVATest, TestARM_OFF8_FORWARDS) {
  83   TestRelativeTargetARM(courgette::ARM_OFF8, 0x2bcc, 0xd00e, 0x2bec);
  84   TestRelativeTargetARM(courgette::ARM_OFF8, 0x3752, 0xd910, 0x3776);
  85 }
  86
  87 TEST_F(TypedRVATest, TestARM_OFF8_BACKWARDS) {
  88   TestRelativeTargetARM(courgette::ARM_OFF8, 0x3774, 0xd1f6, 0x3764);
  89 }
  90
  91 TEST_F(TypedRVATest, TestARM_OFF11_PREFETCH) {
  92   TestRelativeTargetARM(courgette::ARM_OFF11, 0x0, 0x0, 0x4);
  93 }
  94
  95 TEST_F(TypedRVATest, TestARM_OFF11_FORWARDS) {
  96   TestRelativeTargetARM(courgette::ARM_OFF11, 0x2bea, 0xe005, 0x2bf8);
  97 }
  98
  99 TEST_F(TypedRVATest, TestARM_OFF11_BACKWARDS) {
 100   TestRelativeTargetARM(courgette::ARM_OFF11, 0x2f80, 0xe6cd, 0x2d1e);
 101   TestRelativeTargetARM(courgette::ARM_OFF11, 0x3610, 0xe56a, 0x30e8);
 102 }
 103
 104 TEST_F(TypedRVATest, TestARM_OFF24_PREFETCH) {
 105   TestRelativeTargetARM(courgette::ARM_OFF24, 0x0, 0x0, 0x8);
 106 }
 107
 108 TEST_F(TypedRVATest, TestARM_OFF24_FORWARDS) {
 109   TestRelativeTargetARM(courgette::ARM_OFF24, 0x2384, 0x4af3613a, 0xffcda874);
 110   TestRelativeTargetARM(courgette::ARM_OFF24, 0x23bc, 0x6af961b9, 0xffe5aaa8);
 111   TestRelativeTargetARM(courgette::ARM_OFF24, 0x23d4, 0x2b006823, 0x1c468);
 112 }
 113
 114 TEST_F(TypedRVATest, TestARM_OFF24_BACKWARDS) {
 115   // TODO(paulgazz): find a real-world example of an non-thumb ARM
 116   // branch op that jumps backwards.
 117 }
 118
 119 TEST_F(TypedRVATest, TestARM_OFF25_FORWARDS) {
 120   TestRelativeTargetARM(courgette::ARM_OFF25, 0x2bf4, 0xfe06f008, 0xb804);
 121   TestRelativeTargetARM(courgette::ARM_OFF25, 0x2c58, 0xfeacf005, 0x89b4);
 122 }
 123
 124 TEST_F(TypedRVATest, TestARM_OFF25_BACKWARDS) {
 125   TestRelativeTargetARM(courgette::ARM_OFF25, 0x2bd2, 0xeb9ef7ff, 0x2310);
 126   TestRelativeTargetARM(courgette::ARM_OFF25, 0x2bd8, 0xeb8ef7ff, 0x22f8);
 127   TestRelativeTargetARM(courgette::ARM_OFF25, 0x2c3e, 0xea2ef7ff, 0x209c);
 128 }
 129
 130 TEST_F(TypedRVATest, TestARM_OFF21_FORWARDS) {
 131   TestRelativeTargetARM(courgette::ARM_OFF21, 0x2bc6, 0x84c7f000, 0x3558);
 132   TestRelativeTargetARM(courgette::ARM_OFF21, 0x2bde, 0x871df000, 0x3a1c);
 133   TestRelativeTargetARM(courgette::ARM_OFF21, 0x2c5e, 0x86c1f2c0, 0x39e4);
 134 }
 135
 136 TEST_F(TypedRVATest, TestARM_OFF21_BACKWARDS) {
 137   TestRelativeTargetARM(courgette::ARM_OFF21, 0x67e4, 0xaee9f43f, 0x65ba);
 138   TestRelativeTargetARM(courgette::ARM_OFF21, 0x67ee, 0xaee4f47f, 0x65ba);
 139 }
 140
 141 TEST_F(TypedRVATest, TestARMOPEncode) {
 142   TestARMOPEncode(courgette::ARM_OFF8, 0x2bcc, 0xd00e, 0x2bec);
 143   TestARMOPEncode(courgette::ARM_OFF8, 0x3752, 0xd910, 0x3776);
 144   TestARMOPEncode(courgette::ARM_OFF8, 0x3774, 0xd1f6, 0x3764);
 145   TestARMOPEncode(courgette::ARM_OFF11, 0x0, 0x0, 0x4);
 146   TestARMOPEncode(courgette::ARM_OFF11, 0x2bea, 0xe005, 0x2bf8);
 147   TestARMOPEncode(courgette::ARM_OFF11, 0x2f80, 0xe6cd, 0x2d1e);
 148   TestARMOPEncode(courgette::ARM_OFF11, 0x3610, 0xe56a, 0x30e8);
 149   TestARMOPEncode(courgette::ARM_OFF24, 0x0, 0x0, 0x8);
 150   TestARMOPEncode(courgette::ARM_OFF24, 0x2384, 0x4af3613a, 0xffcda874);
 151   TestARMOPEncode(courgette::ARM_OFF24, 0x23bc, 0x6af961b9, 0xffe5aaa8);
 152   TestARMOPEncode(courgette::ARM_OFF24, 0x23d4, 0x2b006823, 0x1c468);
 153   TestARMOPEncode(courgette::ARM_OFF25, 0x2bf4, 0xf008fe06, 0xb804);
 154   TestARMOPEncode(courgette::ARM_OFF25, 0x2c58, 0xf005feac, 0x89b4);
 155   TestARMOPEncode(courgette::ARM_OFF25, 0x2bd2, 0xf7ffeb9e, 0x2310);
 156   TestARMOPEncode(courgette::ARM_OFF25, 0x2bd8, 0xf7ffeb8e, 0x22f8);
 157   TestARMOPEncode(courgette::ARM_OFF25, 0x2c3e, 0xf7ffea2e, 0x209c);
 158   TestARMOPEncode(courgette::ARM_OFF21, 0x2bc6, 0xf00084c7, 0x3558);
 159   TestARMOPEncode(courgette::ARM_OFF21, 0x2bde, 0xf000871d, 0x3a1c);
 160   TestARMOPEncode(courgette::ARM_OFF21, 0x2c5e, 0xf2c086c1, 0x39e4);
 161   TestARMOPEncode(courgette::ARM_OFF21, 0x67e4, 0xf43faee9, 0x65ba);
 162   TestARMOPEncode(courgette::ARM_OFF21, 0x67ee, 0xf47faee4, 0x65ba);
 163 }