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LibX86: Add {Address,Operand}Size::Size64

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For now the opcode tables for OperandSize::Size64 are empty
This commit is contained in:
Simon Wanner 2022-03-25 00:08:40 +01:00 • committed by Andreas Kling
parent a7268c3c74
commit 06ece474e9
4 changed files with 98 additions and 11 deletions
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71
Userland/Libraries/LibX86/Instruction.cpp
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@ -14,8 +14,8 @@
namespace X86 {
InstructionDescriptor s_table[2][256];
InstructionDescriptor s_0f_table[2][256];
InstructionDescriptor s_table[3][256];
InstructionDescriptor s_0f_table[3][256];
InstructionDescriptor s_sse_table_np[256];
InstructionDescriptor s_sse_table_66[256];
InstructionDescriptor s_sse_table_f3[256];
@ -1307,6 +1307,8 @@ String MemoryOrRegisterReference::to_string_xmm(Instruction const& insn) const
String MemoryOrRegisterReference::to_string(Instruction const& insn) const
{
switch (insn.address_size()) {
case AddressSize::Size64:
return to_string_a64();
case AddressSize::Size32:
return to_string_a32();
case AddressSize::Size16:
@ -1455,6 +1457,65 @@ static String sib_to_string(u8 rm, u8 sib)
return builder.to_string();
}
String MemoryOrRegisterReference::to_string_a64() const
{
if (is_register())
return register_name(static_cast<RegisterIndex32>(m_register_index));
bool has_displacement = false;
switch (mod()) {
case 0b00:
has_displacement = rm() == 5;
break;
case 0b01:
case 0b10:
has_displacement = true;
}
if (m_has_sib && (m_sib & 7) == 5)
has_displacement = true;
String base;
switch (rm()) {
case 0:
base = "rax";
break;
case 1:
base = "rcx";
break;
case 2:
base = "rdx";
break;
case 3:
base = "rbx";
break;
case 6:
base = "rsi";
break;
case 7:
base = "rdi";
break;
case 5:
if (mod() == 0)
base = String::formatted("{:#08x}", m_displacement32);
else
base = "rbp";
break;
case 4:
base = sib_to_string(m_rm_byte, m_sib);
break;
}
if (!has_displacement)
return base;
String displacement_string;
if ((i32)m_displacement32 < 0)
displacement_string = String::formatted("-{:#x}", -(i32)m_displacement32);
else
displacement_string = String::formatted("+{:#x}", m_displacement32);
return String::formatted("{}{}", base, displacement_string);
}
String MemoryOrRegisterReference::to_string_a32() const
{
if (is_register())
@ -1541,6 +1602,9 @@ String Instruction::to_string(u32 origin, SymbolProvider const* symbol_provider,
case AddressSize::Size32:
builder.append("a32"sv);
break;
case AddressSize::Size64:
builder.append("a64"sv);
break;
}
}
if (has_operand_size_override_prefix()) {
@ -1551,6 +1615,9 @@ String Instruction::to_string(u32 origin, SymbolProvider const* symbol_provider,
case OperandSize::Size32:
builder.append("o32"sv);
break;
case OperandSize::Size64:
builder.append("o64"sv);
break;
}
}
if (has_lock_prefix())