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LibX86+UserspaceEmulator: Introduce AddressSize and OperandSize enums

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These replace the bools a32 and o32, which will make implementing
64-bit sizes possible. :^)
This commit is contained in:
Simon Wanner 2022-03-24 23:01:11 +01:00 • committed by Andreas Kling
parent 7cd43deb28
commit a7268c3c74
6 changed files with 276 additions and 152 deletions
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136
Userland/Libraries/LibX86/Instruction.cpp
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@ -14,10 +14,8 @@
namespace X86 {
InstructionDescriptor s_table16[256];
InstructionDescriptor s_table32[256];
InstructionDescriptor s_0f_table16[256];
InstructionDescriptor s_0f_table32[256];
InstructionDescriptor s_table[2][256];
InstructionDescriptor s_0f_table[2][256];
InstructionDescriptor s_sse_table_np[256];
InstructionDescriptor s_sse_table_66[256];
InstructionDescriptor s_sse_table_f3[256];
@ -246,68 +244,68 @@ static void build_slash_rm(InstructionDescriptor* table, u8 op, u8 slash, u8 rm,
static void build_0f(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build(s_0f_table16, op, mnemonic, format, impl, lock_prefix_allowed);
build(s_0f_table32, op, mnemonic, format, impl, lock_prefix_allowed);
build(s_0f_table[to_underlying(OperandSize::Size16)], op, mnemonic, format, impl, lock_prefix_allowed);
build(s_0f_table[to_underlying(OperandSize::Size32)], op, mnemonic, format, impl, lock_prefix_allowed);
}
static void build(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build(s_table16, op, mnemonic, format, impl, lock_prefix_allowed);
build(s_table32, op, mnemonic, format, impl, lock_prefix_allowed);
build(s_table[to_underlying(OperandSize::Size16)], op, mnemonic, format, impl, lock_prefix_allowed);
build(s_table[to_underlying(OperandSize::Size32)], op, mnemonic, format, impl, lock_prefix_allowed);
}
static void build(u8 op, char const* mnemonic, InstructionFormat format16, InstructionHandler impl16, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build(s_table16, op, mnemonic, format16, impl16, lock_prefix_allowed);
build(s_table32, op, mnemonic, format32, impl32, lock_prefix_allowed);
build(s_table[to_underlying(OperandSize::Size16)], op, mnemonic, format16, impl16, lock_prefix_allowed);
build(s_table[to_underlying(OperandSize::Size32)], op, mnemonic, format32, impl32, lock_prefix_allowed);
}
static void build_0f(u8 op, char const* mnemonic, InstructionFormat format16, InstructionHandler impl16, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build(s_0f_table16, op, mnemonic, format16, impl16, lock_prefix_allowed);
build(s_0f_table32, op, mnemonic, format32, impl32, lock_prefix_allowed);
build(s_0f_table[to_underlying(OperandSize::Size16)], op, mnemonic, format16, impl16, lock_prefix_allowed);
build(s_0f_table[to_underlying(OperandSize::Size32)], op, mnemonic, format32, impl32, lock_prefix_allowed);
}
static void build(u8 op, char const* mnemonic16, InstructionFormat format16, InstructionHandler impl16, char const* mnemonic32, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build(s_table16, op, mnemonic16, format16, impl16, lock_prefix_allowed);
build(s_table32, op, mnemonic32, format32, impl32, lock_prefix_allowed);
build(s_table[to_underlying(OperandSize::Size16)], op, mnemonic16, format16, impl16, lock_prefix_allowed);
build(s_table[to_underlying(OperandSize::Size32)], op, mnemonic32, format32, impl32, lock_prefix_allowed);
}
static void build_0f(u8 op, char const* mnemonic16, InstructionFormat format16, InstructionHandler impl16, char const* mnemonic32, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build(s_0f_table16, op, mnemonic16, format16, impl16, lock_prefix_allowed);
build(s_0f_table32, op, mnemonic32, format32, impl32, lock_prefix_allowed);
build(s_0f_table[to_underlying(OperandSize::Size16)], op, mnemonic16, format16, impl16, lock_prefix_allowed);
build(s_0f_table[to_underlying(OperandSize::Size32)], op, mnemonic32, format32, impl32, lock_prefix_allowed);
}
static void build_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build_slash(s_table16, op, slash, mnemonic, format, impl, lock_prefix_allowed);
build_slash(s_table32, op, slash, mnemonic, format, impl, lock_prefix_allowed);
build_slash(s_table[to_underlying(OperandSize::Size16)], op, slash, mnemonic, format, impl, lock_prefix_allowed);
build_slash(s_table[to_underlying(OperandSize::Size32)], op, slash, mnemonic, format, impl, lock_prefix_allowed);
}
static void build_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format16, InstructionHandler impl16, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build_slash(s_table16, op, slash, mnemonic, format16, impl16, lock_prefix_allowed);
build_slash(s_table32, op, slash, mnemonic, format32, impl32, lock_prefix_allowed);
build_slash(s_table[to_underlying(OperandSize::Size16)], op, slash, mnemonic, format16, impl16, lock_prefix_allowed);
build_slash(s_table[to_underlying(OperandSize::Size32)], op, slash, mnemonic, format32, impl32, lock_prefix_allowed);
}
static void build_0f_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format16, InstructionHandler impl16, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build_slash(s_0f_table16, op, slash, mnemonic, format16, impl16, lock_prefix_allowed);
build_slash(s_0f_table32, op, slash, mnemonic, format32, impl32, lock_prefix_allowed);
build_slash(s_0f_table[to_underlying(OperandSize::Size16)], op, slash, mnemonic, format16, impl16, lock_prefix_allowed);
build_slash(s_0f_table[to_underlying(OperandSize::Size32)], op, slash, mnemonic, format32, impl32, lock_prefix_allowed);
}
static void build_0f_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
build_slash(s_0f_table16, op, slash, mnemonic, format, impl, lock_prefix_allowed);
build_slash(s_0f_table32, op, slash, mnemonic, format, impl, lock_prefix_allowed);
build_slash(s_0f_table[to_underlying(OperandSize::Size16)], op, slash, mnemonic, format, impl, lock_prefix_allowed);
build_slash(s_0f_table[to_underlying(OperandSize::Size32)], op, slash, mnemonic, format, impl, lock_prefix_allowed);
}
static void build_slash_rm(u8 op, u8 slash, u8 rm, char const* mnemonic, InstructionFormat format, InstructionHandler impl)
{
build_slash_rm(s_table16, op, slash, rm, mnemonic, format, impl);
build_slash_rm(s_table32, op, slash, rm, mnemonic, format, impl);
build_slash_rm(s_table[to_underlying(OperandSize::Size16)], op, slash, rm, mnemonic, format, impl);
build_slash_rm(s_table[to_underlying(OperandSize::Size32)], op, slash, rm, mnemonic, format, impl);
}
static void build_slash_reg(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl)
@ -318,40 +316,39 @@ static void build_slash_reg(u8 op, u8 slash, char const* mnemonic, InstructionFo
static void build_sse_np(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
if (s_0f_table32[op].format != __SSE)
if (s_0f_table[to_underlying(OperandSize::Size32)][op].format == InvalidFormat) {
build_0f(op, mnemonic, format, impl, lock_prefix_allowed);
build(s_sse_table_np, op, mnemonic, format, impl, lock_prefix_allowed);
return;
}
if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
VERIFY(s_0f_table32[op].format == __SSE);
VERIFY(s_sse_table_np[op].format == InvalidFormat);
VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
build(s_sse_table_np, op, mnemonic, format, impl, lock_prefix_allowed);
}
static void build_sse_66(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
if (s_0f_table32[op].format != __SSE)
if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
VERIFY(s_0f_table32[op].format == __SSE);
VERIFY(s_sse_table_66[op].format == InvalidFormat);
VERIFY(s_0f_table[to_underlying(AddressSize::Size32)][op].format == __SSE);
build(s_sse_table_66, op, mnemonic, format, impl, lock_prefix_allowed);
}
static void build_sse_f3(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
if (s_0f_table32[op].format != __SSE)
if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
VERIFY(s_0f_table32[op].format == __SSE);
VERIFY(s_sse_table_f3[op].format == InvalidFormat);
VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
build(s_sse_table_f3, op, mnemonic, format, impl, lock_prefix_allowed);
}
static void build_sse_f2(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
if (s_0f_table32[op].format != __SSE)
if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
VERIFY(s_0f_table32[op].format == __SSE);
VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
VERIFY(s_sse_table_f2[op].format == InvalidFormat);
build(s_sse_table_f2, op, mnemonic, format, impl, lock_prefix_allowed);
@ -359,18 +356,18 @@ static void build_sse_f2(u8 op, char const* mnemonic, InstructionFormat format,
static void build_sse_np_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
if (s_0f_table32[op].format != __SSE)
if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
VERIFY(s_0f_table32[op].format == __SSE);
VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
build_slash(s_sse_table_np, op, slash, mnemonic, format, impl, lock_prefix_allowed);
}
static void build_sse_66_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
{
if (s_0f_table32[op].format != __SSE)
if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
VERIFY(s_0f_table32[op].format == __SSE);
VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
build_slash(s_sse_table_66, op, slash, mnemonic, format, impl, lock_prefix_allowed);
}
@ -1309,9 +1306,13 @@ String MemoryOrRegisterReference::to_string_xmm(Instruction const& insn) const
String MemoryOrRegisterReference::to_string(Instruction const& insn) const
{
if (insn.a32())
switch (insn.address_size()) {
case AddressSize::Size32:
return to_string_a32();
return to_string_a16();
case AddressSize::Size16:
return to_string_a16();
}
VERIFY_NOT_REACHED();
}
String MemoryOrRegisterReference::to_string_a16() const
@ -1532,11 +1533,26 @@ String Instruction::to_string(u32 origin, SymbolProvider const* symbol_provider,
StringBuilder builder;
if (has_segment_prefix())
builder.appendff("{}: ", register_name(segment_prefix().value()));
if (has_address_size_override_prefix())
builder.append(m_a32 ? "a32 "sv : "a16 "sv);
// Note: SSE2 Uses this to change to doubles in SSE instruction or xmm registers in MMX instructions
if (has_operand_size_override_prefix() && !(m_descriptor->format > __SSE && m_descriptor->format < __EndFormatsWithRMByte))
builder.append(m_o32 ? "o32 "sv : "o16 "sv);
if (has_address_size_override_prefix()) {
switch (m_address_size) {
case AddressSize::Size16:
builder.append("a16"sv);
break;
case AddressSize::Size32:
builder.append("a32"sv);
break;
}
}
if (has_operand_size_override_prefix()) {
switch (m_operand_size) {
case OperandSize::Size16:
builder.append("o16"sv);
break;
case OperandSize::Size32:
builder.append("o32"sv);
break;
}
}
if (has_lock_prefix())
builder.append("lock "sv);
// Note: SSE instructions use these to toggle between packed and single data
@ -1597,7 +1613,15 @@ void Instruction::to_string_internal(StringBuilder& builder, u32 origin, SymbolP
auto append_seg = [&] { builder.append(register_name(segment_register())); };
auto append_creg = [&] { builder.appendff("cr{}", register_index()); };
auto append_dreg = [&] { builder.appendff("dr{}", register_index()); };
auto append_relative_addr = [&] { formatted_address(origin + (m_a32 ? 6 : 4), x32, i32(m_a32 ? imm32() : imm16())); };
auto append_relative_addr = [&] {
if (m_address_size == AddressSize::Size32) {
formatted_address(origin + 6, x32, i32(imm32()));
} else if (m_address_size == AddressSize::Size16) {
formatted_address(origin + 4, x32, i32(imm16()));
} else {
VERIFY_NOT_REACHED();
}
};
auto append_relative_imm8 = [&] { formatted_address(origin + 2, x32, i8(imm8())); };
auto append_relative_imm16 = [&] { formatted_address(origin + 3, x32, i16(imm16())); };
auto append_relative_imm32 = [&] { formatted_address(origin + 5, x32, i32(imm32())); };
@ -1629,10 +1653,12 @@ void Instruction::to_string_internal(StringBuilder& builder, u32 origin, SymbolP
auto append = [&](auto content) { builder.append(content); };
auto append_moff = [&] {
builder.append('[');
if (m_a32) {
if (m_address_size == AddressSize::Size32) {
append_imm32();
} else {
} else if (m_address_size == AddressSize::Size16) {
append_imm16();
} else {
VERIFY_NOT_REACHED();
}
builder.append(']');
};
@ -2143,7 +2169,7 @@ void Instruction::to_string_internal(StringBuilder& builder, u32 origin, SymbolP
break;
case OP_reg:
append_mnemonic_space();
if (m_o32)
if (m_operand_size == OperandSize::Size32)
append_reg32();
else
append_reg16();