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https://github.com/RGBCube/serenity
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LibX86: Support decoding basic MMX instructions like MOVQ
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2 changed files with 67 additions and 1 deletions
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@ -24,8 +24,8 @@
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibX86/Instruction.h>
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#include <AK/StringBuilder.h>
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#include <LibX86/Instruction.h>
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#include <stdio.h>
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namespace X86 {
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@ -85,6 +85,8 @@ enum InstructionFormat {
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OP_RM32_reg32_imm8,
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OP_RM16_reg16_CL,
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OP_RM32_reg32_CL,
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OP_mm1_mm2m64,
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OP_mm1m64_mm2,
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__EndFormatsWithRMByte,
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OP_reg32_imm32,
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@ -283,6 +285,8 @@ static void build(InstructionDescriptor* table, u8 op, const char* mnemonic, Ins
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case OP_CR_reg32:
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case OP_reg16_RM8:
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case OP_reg32_RM8:
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case OP_mm1_mm2m64:
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case OP_mm1m64_mm2:
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case __EndFormatsWithRMByte:
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case OP_CS:
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case OP_DS:
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@ -760,6 +764,10 @@ void build_opcode_tables_if_needed()
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build0F(0x4E, "CMOVNG", OP_reg16_RM16, OP_reg32_RM32);
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build0F(0x4F, "CMOVG", OP_reg16_RM16, OP_reg32_RM32);
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build0F(0x6F, "MOVQ", OP_mm1_mm2m64);
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build0F(0x77, "EMMS", OP);
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build0F(0x7F, "MOVQ", OP_mm1m64_mm2);
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build0F(0x80, "JO", OP_NEAR_imm);
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build0F(0x81, "JNO", OP_NEAR_imm);
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build0F(0x82, "JC", OP_NEAR_imm);
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@ -975,6 +983,7 @@ static const char* register_name(RegisterIndex8);
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static const char* register_name(RegisterIndex16);
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static const char* register_name(RegisterIndex32);
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static const char* register_name(SegmentRegister);
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static const char* register_name(MMXRegisterIndex);
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const char* Instruction::reg8_name() const
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{
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@ -1012,6 +1021,13 @@ String MemoryOrRegisterReference::to_string_o32() const
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return String::format("[%s]", to_string().characters());
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}
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String MemoryOrRegisterReference::to_string_mm() const
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{
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if (is_register())
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return register_name(static_cast<MMXRegisterIndex>(m_register_index));
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return String::format("[%s]", to_string().characters());
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}
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String MemoryOrRegisterReference::to_string() const
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{
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if (m_a32)
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@ -1291,6 +1307,10 @@ String Instruction::to_string_internal(u32 origin, bool x32) const
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auto append_relative_imm8 = [&] { builder.append(relative_address(origin + 2, x32, i8(imm8()))); };
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auto append_relative_imm16 = [&] { builder.append(relative_address(origin + 3, x32, i16(imm16()))); };
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auto append_relative_imm32 = [&] { builder.append(relative_address(origin + 5, x32, i32(imm32()))); };
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auto append_mm = [&] { builder.appendf("mm%u", register_index()); };
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auto append_mmrm64 = [&] { builder.append(m_modrm.to_string_mm()); };
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auto append = [&](auto& content) { builder.append(content); };
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auto append_moff = [&] {
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builder.append('[');
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@ -1686,6 +1706,16 @@ String Instruction::to_string_internal(u32 origin, bool x32) const
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append_reg32();
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append(", cl");
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break;
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case OP_mm1_mm2m64:
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append_mm();
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append(", ");
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append_mmrm64();
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break;
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case OP_mm1m64_mm2:
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append_mm();
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append(", ");
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append_mmrm64();
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break;
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case InstructionPrefix:
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return mnemonic;
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case InvalidFormat:
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@ -1799,6 +1829,30 @@ const char* register_name(RegisterIndex32 register_index)
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return nullptr;
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}
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const char* register_name(MMXRegisterIndex register_index)
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{
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switch (register_index) {
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case RegisterMM0:
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return "mm0";
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case RegisterMM1:
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return "mm1";
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case RegisterMM2:
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return "mm2";
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case RegisterMM3:
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return "mm3";
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case RegisterMM4:
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return "mm4";
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case RegisterMM5:
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return "mm5";
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case RegisterMM6:
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return "mm6";
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case RegisterMM7:
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return "mm7";
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}
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ASSERT_NOT_REACHED();
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return nullptr;
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}
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void MemoryOrRegisterReference::decode(InstructionStream& stream, bool a32)
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{
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m_a32 = a32;
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@ -124,6 +124,17 @@ enum RegisterIndex32 {
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RegisterEDI
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};
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enum MMXRegisterIndex {
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RegisterMM0 = 0,
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RegisterMM1,
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RegisterMM2,
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RegisterMM3,
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RegisterMM4,
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RegisterMM5,
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RegisterMM6,
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RegisterMM7
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};
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class LogicalAddress {
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public:
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LogicalAddress() {}
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@ -197,6 +208,7 @@ public:
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String to_string_o8() const;
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String to_string_o16() const;
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String to_string_o32() const;
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String to_string_mm() const;
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bool is_register() const { return m_register_index != 0xffffffff; }
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SegmentRegister segment() const
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