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https://github.com/RGBCube/serenity
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LibX86+UserspaceEmulator: Introduce AddressSize and OperandSize enums
These replace the bools a32 and o32, which will make implementing 64-bit sizes possible. :^)
This commit is contained in:
Simon Wanner
Andreas Kling
parent
7cd43deb28
commit
a7268c3c74
6 changed files with 276 additions and 152 deletions
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@ -23,7 +23,7 @@ public:
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if (!m_stream.can_read())
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return {};
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#if ARCH(I386)
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return Instruction::from_stream(m_stream, true, true);
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return Instruction::from_stream(m_stream, OperandSize::Size32, AddressSize::Size32);
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#else
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dbgln("FIXME: Implement disassembly support for x86_64");
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return {};
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@ -14,10 +14,8 @@
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namespace X86 {
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InstructionDescriptor s_table16[256];
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InstructionDescriptor s_table32[256];
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InstructionDescriptor s_0f_table16[256];
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InstructionDescriptor s_0f_table32[256];
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InstructionDescriptor s_table[2][256];
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InstructionDescriptor s_0f_table[2][256];
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InstructionDescriptor s_sse_table_np[256];
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InstructionDescriptor s_sse_table_66[256];
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InstructionDescriptor s_sse_table_f3[256];
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@ -246,68 +244,68 @@ static void build_slash_rm(InstructionDescriptor* table, u8 op, u8 slash, u8 rm,
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static void build_0f(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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build(s_0f_table16, op, mnemonic, format, impl, lock_prefix_allowed);
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build(s_0f_table32, op, mnemonic, format, impl, lock_prefix_allowed);
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build(s_0f_table[to_underlying(OperandSize::Size16)], op, mnemonic, format, impl, lock_prefix_allowed);
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build(s_0f_table[to_underlying(OperandSize::Size32)], op, mnemonic, format, impl, lock_prefix_allowed);
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}
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static void build(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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build(s_table16, op, mnemonic, format, impl, lock_prefix_allowed);
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build(s_table32, op, mnemonic, format, impl, lock_prefix_allowed);
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build(s_table[to_underlying(OperandSize::Size16)], op, mnemonic, format, impl, lock_prefix_allowed);
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build(s_table[to_underlying(OperandSize::Size32)], op, mnemonic, format, impl, lock_prefix_allowed);
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}
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static void build(u8 op, char const* mnemonic, InstructionFormat format16, InstructionHandler impl16, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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build(s_table16, op, mnemonic, format16, impl16, lock_prefix_allowed);
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build(s_table32, op, mnemonic, format32, impl32, lock_prefix_allowed);
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build(s_table[to_underlying(OperandSize::Size16)], op, mnemonic, format16, impl16, lock_prefix_allowed);
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build(s_table[to_underlying(OperandSize::Size32)], op, mnemonic, format32, impl32, lock_prefix_allowed);
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}
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static void build_0f(u8 op, char const* mnemonic, InstructionFormat format16, InstructionHandler impl16, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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build(s_0f_table16, op, mnemonic, format16, impl16, lock_prefix_allowed);
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build(s_0f_table32, op, mnemonic, format32, impl32, lock_prefix_allowed);
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build(s_0f_table[to_underlying(OperandSize::Size16)], op, mnemonic, format16, impl16, lock_prefix_allowed);
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build(s_0f_table[to_underlying(OperandSize::Size32)], op, mnemonic, format32, impl32, lock_prefix_allowed);
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}
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static void build(u8 op, char const* mnemonic16, InstructionFormat format16, InstructionHandler impl16, char const* mnemonic32, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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build(s_table16, op, mnemonic16, format16, impl16, lock_prefix_allowed);
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build(s_table32, op, mnemonic32, format32, impl32, lock_prefix_allowed);
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build(s_table[to_underlying(OperandSize::Size16)], op, mnemonic16, format16, impl16, lock_prefix_allowed);
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build(s_table[to_underlying(OperandSize::Size32)], op, mnemonic32, format32, impl32, lock_prefix_allowed);
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}
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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)
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{
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build(s_0f_table16, op, mnemonic16, format16, impl16, lock_prefix_allowed);
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build(s_0f_table32, op, mnemonic32, format32, impl32, lock_prefix_allowed);
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build(s_0f_table[to_underlying(OperandSize::Size16)], op, mnemonic16, format16, impl16, lock_prefix_allowed);
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build(s_0f_table[to_underlying(OperandSize::Size32)], op, mnemonic32, format32, impl32, lock_prefix_allowed);
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}
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static void build_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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build_slash(s_table16, op, slash, mnemonic, format, impl, lock_prefix_allowed);
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build_slash(s_table32, op, slash, mnemonic, format, impl, lock_prefix_allowed);
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build_slash(s_table[to_underlying(OperandSize::Size16)], op, slash, mnemonic, format, impl, lock_prefix_allowed);
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build_slash(s_table[to_underlying(OperandSize::Size32)], op, slash, mnemonic, format, impl, lock_prefix_allowed);
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}
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static void build_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format16, InstructionHandler impl16, InstructionFormat format32, InstructionHandler impl32, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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build_slash(s_table16, op, slash, mnemonic, format16, impl16, lock_prefix_allowed);
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build_slash(s_table32, op, slash, mnemonic, format32, impl32, lock_prefix_allowed);
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build_slash(s_table[to_underlying(OperandSize::Size16)], op, slash, mnemonic, format16, impl16, lock_prefix_allowed);
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build_slash(s_table[to_underlying(OperandSize::Size32)], op, slash, mnemonic, format32, impl32, lock_prefix_allowed);
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}
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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)
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{
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build_slash(s_0f_table16, op, slash, mnemonic, format16, impl16, lock_prefix_allowed);
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build_slash(s_0f_table32, op, slash, mnemonic, format32, impl32, lock_prefix_allowed);
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build_slash(s_0f_table[to_underlying(OperandSize::Size16)], op, slash, mnemonic, format16, impl16, lock_prefix_allowed);
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build_slash(s_0f_table[to_underlying(OperandSize::Size32)], op, slash, mnemonic, format32, impl32, lock_prefix_allowed);
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}
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static void build_0f_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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build_slash(s_0f_table16, op, slash, mnemonic, format, impl, lock_prefix_allowed);
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build_slash(s_0f_table32, op, slash, mnemonic, format, impl, lock_prefix_allowed);
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build_slash(s_0f_table[to_underlying(OperandSize::Size16)], op, slash, mnemonic, format, impl, lock_prefix_allowed);
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build_slash(s_0f_table[to_underlying(OperandSize::Size32)], op, slash, mnemonic, format, impl, lock_prefix_allowed);
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}
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static void build_slash_rm(u8 op, u8 slash, u8 rm, char const* mnemonic, InstructionFormat format, InstructionHandler impl)
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{
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build_slash_rm(s_table16, op, slash, rm, mnemonic, format, impl);
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build_slash_rm(s_table32, op, slash, rm, mnemonic, format, impl);
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build_slash_rm(s_table[to_underlying(OperandSize::Size16)], op, slash, rm, mnemonic, format, impl);
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build_slash_rm(s_table[to_underlying(OperandSize::Size32)], op, slash, rm, mnemonic, format, impl);
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}
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static void build_slash_reg(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl)
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@ -318,40 +316,39 @@ static void build_slash_reg(u8 op, u8 slash, char const* mnemonic, InstructionFo
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static void build_sse_np(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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if (s_0f_table32[op].format != __SSE)
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if (s_0f_table[to_underlying(OperandSize::Size32)][op].format == InvalidFormat) {
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build_0f(op, mnemonic, format, impl, lock_prefix_allowed);
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build(s_sse_table_np, op, mnemonic, format, impl, lock_prefix_allowed);
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return;
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}
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if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
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build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
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VERIFY(s_0f_table32[op].format == __SSE);
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VERIFY(s_sse_table_np[op].format == InvalidFormat);
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VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
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build(s_sse_table_np, op, mnemonic, format, impl, lock_prefix_allowed);
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}
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static void build_sse_66(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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if (s_0f_table32[op].format != __SSE)
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if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
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build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
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VERIFY(s_0f_table32[op].format == __SSE);
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VERIFY(s_sse_table_66[op].format == InvalidFormat);
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VERIFY(s_0f_table[to_underlying(AddressSize::Size32)][op].format == __SSE);
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build(s_sse_table_66, op, mnemonic, format, impl, lock_prefix_allowed);
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}
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static void build_sse_f3(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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if (s_0f_table32[op].format != __SSE)
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if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
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build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
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VERIFY(s_0f_table32[op].format == __SSE);
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VERIFY(s_sse_table_f3[op].format == InvalidFormat);
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VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
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build(s_sse_table_f3, op, mnemonic, format, impl, lock_prefix_allowed);
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}
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static void build_sse_f2(u8 op, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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if (s_0f_table32[op].format != __SSE)
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if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
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build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
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VERIFY(s_0f_table32[op].format == __SSE);
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VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
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VERIFY(s_sse_table_f2[op].format == InvalidFormat);
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build(s_sse_table_f2, op, mnemonic, format, impl, lock_prefix_allowed);
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@ -359,18 +356,18 @@ static void build_sse_f2(u8 op, char const* mnemonic, InstructionFormat format,
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static void build_sse_np_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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if (s_0f_table32[op].format != __SSE)
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if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
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build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
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VERIFY(s_0f_table32[op].format == __SSE);
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VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
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build_slash(s_sse_table_np, op, slash, mnemonic, format, impl, lock_prefix_allowed);
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}
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static void build_sse_66_slash(u8 op, u8 slash, char const* mnemonic, InstructionFormat format, InstructionHandler impl, IsLockPrefixAllowed lock_prefix_allowed = LockPrefixNotAllowed)
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{
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if (s_0f_table32[op].format != __SSE)
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if (s_0f_table[to_underlying(OperandSize::Size32)][op].format != __SSE)
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build_0f(op, "__SSE_temp", __SSE, nullptr, lock_prefix_allowed);
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VERIFY(s_0f_table32[op].format == __SSE);
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VERIFY(s_0f_table[to_underlying(OperandSize::Size32)][op].format == __SSE);
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build_slash(s_sse_table_66, op, slash, mnemonic, format, impl, lock_prefix_allowed);
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}
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@ -1309,9 +1306,13 @@ String MemoryOrRegisterReference::to_string_xmm(Instruction const& insn) const
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String MemoryOrRegisterReference::to_string(Instruction const& insn) const
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{
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if (insn.a32())
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switch (insn.address_size()) {
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case AddressSize::Size32:
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return to_string_a32();
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return to_string_a16();
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case AddressSize::Size16:
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return to_string_a16();
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}
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VERIFY_NOT_REACHED();
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}
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String MemoryOrRegisterReference::to_string_a16() const
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@ -1532,11 +1533,26 @@ String Instruction::to_string(u32 origin, SymbolProvider const* symbol_provider,
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StringBuilder builder;
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if (has_segment_prefix())
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builder.appendff("{}: ", register_name(segment_prefix().value()));
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if (has_address_size_override_prefix())
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builder.append(m_a32 ? "a32 "sv : "a16 "sv);
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// Note: SSE2 Uses this to change to doubles in SSE instruction or xmm registers in MMX instructions
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if (has_operand_size_override_prefix() && !(m_descriptor->format > __SSE && m_descriptor->format < __EndFormatsWithRMByte))
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builder.append(m_o32 ? "o32 "sv : "o16 "sv);
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if (has_address_size_override_prefix()) {
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switch (m_address_size) {
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case AddressSize::Size16:
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builder.append("a16"sv);
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break;
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case AddressSize::Size32:
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builder.append("a32"sv);
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break;
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}
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}
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if (has_operand_size_override_prefix()) {
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switch (m_operand_size) {
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case OperandSize::Size16:
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builder.append("o16"sv);
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break;
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case OperandSize::Size32:
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builder.append("o32"sv);
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break;
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}
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}
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if (has_lock_prefix())
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builder.append("lock "sv);
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// Note: SSE instructions use these to toggle between packed and single data
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@ -1597,7 +1613,15 @@ void Instruction::to_string_internal(StringBuilder& builder, u32 origin, SymbolP
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auto append_seg = [&] { builder.append(register_name(segment_register())); };
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auto append_creg = [&] { builder.appendff("cr{}", register_index()); };
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auto append_dreg = [&] { builder.appendff("dr{}", register_index()); };
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auto append_relative_addr = [&] { formatted_address(origin + (m_a32 ? 6 : 4), x32, i32(m_a32 ? imm32() : imm16())); };
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auto append_relative_addr = [&] {
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if (m_address_size == AddressSize::Size32) {
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formatted_address(origin + 6, x32, i32(imm32()));
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} else if (m_address_size == AddressSize::Size16) {
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formatted_address(origin + 4, x32, i32(imm16()));
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} else {
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VERIFY_NOT_REACHED();
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}
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};
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auto append_relative_imm8 = [&] { formatted_address(origin + 2, x32, i8(imm8())); };
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auto append_relative_imm16 = [&] { formatted_address(origin + 3, x32, i16(imm16())); };
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auto append_relative_imm32 = [&] { formatted_address(origin + 5, x32, i32(imm32())); };
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@ -1629,10 +1653,12 @@ void Instruction::to_string_internal(StringBuilder& builder, u32 origin, SymbolP
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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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if (m_a32) {
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if (m_address_size == AddressSize::Size32) {
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append_imm32();
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} else {
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} else if (m_address_size == AddressSize::Size16) {
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append_imm16();
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} else {
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VERIFY_NOT_REACHED();
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}
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builder.append(']');
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};
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@ -2143,7 +2169,7 @@ void Instruction::to_string_internal(StringBuilder& builder, u32 origin, SymbolP
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break;
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case OP_reg:
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append_mnemonic_space();
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if (m_o32)
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if (m_operand_size == OperandSize::Size32)
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append_reg32();
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else
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append_reg16();
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@ -42,6 +42,16 @@ constexpr T sign_extended_to(U value)
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return (TypeTrivia<T>::mask & ~TypeTrivia<U>::mask) | value;
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}
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enum class OperandSize : u8 {
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Size16,
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Size32,
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};
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enum class AddressSize : u8 {
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Size16,
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Size32,
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};
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enum IsLockPrefixAllowed {
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LockPrefixNotAllowed = 0,
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LockPrefixAllowed
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@ -214,27 +224,39 @@ struct InstructionDescriptor {
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// a non-null slashes member that's indexed by the three R/M bits.
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InstructionDescriptor* slashes { nullptr };
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unsigned imm1_bytes_for_address_size(bool a32) const
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unsigned imm1_bytes_for_address_size(AddressSize size) const
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{
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if (imm1_bytes == CurrentAddressSize)
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return a32 ? 4 : 2;
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if (imm1_bytes == CurrentAddressSize) {
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switch (size) {
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case AddressSize::Size32:
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return 4;
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case AddressSize::Size16:
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return 2;
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}
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VERIFY_NOT_REACHED();
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}
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return imm1_bytes;
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}
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unsigned imm2_bytes_for_address_size(bool a32) const
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unsigned imm2_bytes_for_address_size(AddressSize size) const
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{
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if (imm2_bytes == CurrentAddressSize)
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return a32 ? 4 : 2;
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if (imm2_bytes == CurrentAddressSize) {
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switch (size) {
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case AddressSize::Size32:
|
||||
return 4;
|
||||
case AddressSize::Size16:
|
||||
return 2;
|
||||
}
|
||||
VERIFY_NOT_REACHED();
|
||||
}
|
||||
return imm2_bytes;
|
||||
}
|
||||
|
||||
IsLockPrefixAllowed lock_prefix_allowed { LockPrefixNotAllowed };
|
||||
};
|
||||
|
||||
extern InstructionDescriptor s_table16[256];
|
||||
extern InstructionDescriptor s_table32[256];
|
||||
extern InstructionDescriptor s_0f_table16[256];
|
||||
extern InstructionDescriptor s_0f_table32[256];
|
||||
extern InstructionDescriptor s_table[2][256];
|
||||
extern InstructionDescriptor s_0f_table[2][256];
|
||||
extern InstructionDescriptor s_sse_table_np[256];
|
||||
extern InstructionDescriptor s_sse_table_66[256];
|
||||
extern InstructionDescriptor s_sse_table_f3[256];
|
||||
|
|
@ -469,7 +491,7 @@ private:
|
|||
String to_string_a32() const;
|
||||
|
||||
template<typename InstructionStreamType>
|
||||
void decode(InstructionStreamType&, bool a32);
|
||||
void decode(InstructionStreamType&, AddressSize);
|
||||
template<typename InstructionStreamType>
|
||||
void decode16(InstructionStreamType&);
|
||||
template<typename InstructionStreamType>
|
||||
|
|
@ -497,7 +519,7 @@ private:
|
|||
class Instruction {
|
||||
public:
|
||||
template<typename InstructionStreamType>
|
||||
static Instruction from_stream(InstructionStreamType&, bool o32, bool a32);
|
||||
static Instruction from_stream(InstructionStreamType&, OperandSize, AddressSize);
|
||||
~Instruction() = default;
|
||||
|
||||
ALWAYS_INLINE MemoryOrRegisterReference& modrm() const { return m_modrm; }
|
||||
|
|
@ -537,7 +559,16 @@ public:
|
|||
u16 imm16_2() const { return m_imm2; }
|
||||
u32 imm32_1() const { return imm32(); }
|
||||
u32 imm32_2() const { return m_imm2; }
|
||||
u32 imm_address() const { return m_a32 ? imm32() : imm16(); }
|
||||
u32 imm_address() const
|
||||
{
|
||||
switch (m_address_size) {
|
||||
case AddressSize::Size32:
|
||||
return imm32();
|
||||
case AddressSize::Size16:
|
||||
return imm16();
|
||||
}
|
||||
VERIFY_NOT_REACHED();
|
||||
}
|
||||
|
||||
LogicalAddress imm_address16_16() const { return LogicalAddress(imm16_1(), imm16_2()); }
|
||||
LogicalAddress imm_address16_32() const { return LogicalAddress(imm16_1(), imm32_2()); }
|
||||
|
|
@ -556,13 +587,13 @@ public:
|
|||
|
||||
u8 cc() const { return has_sub_op() ? m_sub_op & 0xf : m_op & 0xf; }
|
||||
|
||||
bool a32() const { return m_a32; }
|
||||
AddressSize address_size() const { return m_address_size; }
|
||||
|
||||
String to_string(u32 origin, SymbolProvider const* = nullptr, bool x32 = true) const;
|
||||
|
||||
private:
|
||||
template<typename InstructionStreamType>
|
||||
Instruction(InstructionStreamType&, bool o32, bool a32);
|
||||
Instruction(InstructionStreamType&, OperandSize, AddressSize);
|
||||
|
||||
void to_string_internal(StringBuilder&, u32 origin, SymbolProvider const*, bool x32) const;
|
||||
|
||||
|
|
@ -580,8 +611,8 @@ private:
|
|||
u8 m_sub_op { 0 };
|
||||
u8 m_extra_bytes { 0 };
|
||||
u8 m_rep_prefix { 0 };
|
||||
bool m_a32 : 1 { false };
|
||||
bool m_o32 : 1 { false };
|
||||
OperandSize m_operand_size { OperandSize::Size16 };
|
||||
AddressSize m_address_size { AddressSize::Size16 };
|
||||
bool m_has_lock_prefix : 1 { false };
|
||||
bool m_has_operand_size_override_prefix : 1 { false };
|
||||
bool m_has_address_size_override_prefix : 1 { false };
|
||||
|
|
@ -819,9 +850,9 @@ ALWAYS_INLINE typename CPU::ValueWithShadowType256 MemoryOrRegisterReference::re
|
|||
}
|
||||
|
||||
template<typename InstructionStreamType>
|
||||
ALWAYS_INLINE Instruction Instruction::from_stream(InstructionStreamType& stream, bool o32, bool a32)
|
||||
ALWAYS_INLINE Instruction Instruction::from_stream(InstructionStreamType& stream, OperandSize operand_size, AddressSize address_size)
|
||||
{
|
||||
return Instruction(stream, o32, a32);
|
||||
return Instruction(stream, operand_size, address_size);
|
||||
}
|
||||
|
||||
ALWAYS_INLINE unsigned Instruction::length() const
|
||||
|
|
@ -860,20 +891,26 @@ ALWAYS_INLINE Optional<SegmentRegister> to_segment_prefix(u8 op)
|
|||
}
|
||||
|
||||
template<typename InstructionStreamType>
|
||||
ALWAYS_INLINE Instruction::Instruction(InstructionStreamType& stream, bool o32, bool a32)
|
||||
: m_a32(a32)
|
||||
, m_o32(o32)
|
||||
ALWAYS_INLINE Instruction::Instruction(InstructionStreamType& stream, OperandSize operand_size, AddressSize address_size)
|
||||
: m_operand_size(operand_size)
|
||||
, m_address_size(address_size)
|
||||
{
|
||||
u8 prefix_bytes = 0;
|
||||
for (;; ++prefix_bytes) {
|
||||
u8 opbyte = stream.read8();
|
||||
if (opbyte == Prefix::OperandSizeOverride) {
|
||||
m_o32 = !o32;
|
||||
if (operand_size == OperandSize::Size32)
|
||||
m_operand_size = OperandSize::Size16;
|
||||
else if (operand_size == OperandSize::Size16)
|
||||
m_operand_size = OperandSize::Size32;
|
||||
m_has_operand_size_override_prefix = true;
|
||||
continue;
|
||||
}
|
||||
if (opbyte == Prefix::AddressSizeOverride) {
|
||||
m_a32 = !a32;
|
||||
if (address_size == AddressSize::Size32)
|
||||
m_address_size = AddressSize::Size16;
|
||||
else if (address_size == AddressSize::Size16)
|
||||
m_address_size = AddressSize::Size32;
|
||||
m_has_address_size_override_prefix = true;
|
||||
continue;
|
||||
}
|
||||
|
|
@ -896,9 +933,9 @@ ALWAYS_INLINE Instruction::Instruction(InstructionStreamType& stream, bool o32,
|
|||
|
||||
if (m_op == 0x0f) {
|
||||
m_sub_op = stream.read8();
|
||||
m_descriptor = m_o32 ? &s_0f_table32[m_sub_op] : &s_0f_table16[m_sub_op];
|
||||
m_descriptor = &s_0f_table[to_underlying(m_operand_size)][m_sub_op];
|
||||
} else {
|
||||
m_descriptor = m_o32 ? &s_table32[m_op] : &s_table16[m_op];
|
||||
m_descriptor = &s_table[to_underlying(m_operand_size)][m_op];
|
||||
}
|
||||
|
||||
if (m_descriptor->format == __SSE) {
|
||||
|
|
@ -906,7 +943,7 @@ ALWAYS_INLINE Instruction::Instruction(InstructionStreamType& stream, bool o32,
|
|||
m_descriptor = &s_sse_table_f3[m_sub_op];
|
||||
} else if (m_has_operand_size_override_prefix) {
|
||||
// This was unset while parsing the prefix initially
|
||||
m_o32 = true;
|
||||
m_operand_size = OperandSize::Size32;
|
||||
m_descriptor = &s_sse_table_66[m_sub_op];
|
||||
} else {
|
||||
m_descriptor = &s_sse_table_np[m_sub_op];
|
||||
|
|
@ -915,7 +952,7 @@ ALWAYS_INLINE Instruction::Instruction(InstructionStreamType& stream, bool o32,
|
|||
|
||||
if (m_descriptor->has_rm) {
|
||||
// Consume ModR/M (may include SIB and displacement.)
|
||||
m_modrm.decode(stream, m_a32);
|
||||
m_modrm.decode(stream, m_address_size);
|
||||
m_register_index = m_modrm.reg();
|
||||
} else {
|
||||
if (has_sub_op())
|
||||
|
|
@ -947,8 +984,8 @@ ALWAYS_INLINE Instruction::Instruction(InstructionStreamType& stream, bool o32,
|
|||
return;
|
||||
}
|
||||
|
||||
auto imm1_bytes = m_descriptor->imm1_bytes_for_address_size(m_a32);
|
||||
auto imm2_bytes = m_descriptor->imm2_bytes_for_address_size(m_a32);
|
||||
auto imm1_bytes = m_descriptor->imm1_bytes_for_address_size(m_address_size);
|
||||
auto imm2_bytes = m_descriptor->imm2_bytes_for_address_size(m_address_size);
|
||||
|
||||
// Consume immediates if present.
|
||||
switch (imm2_bytes) {
|
||||
|
|
@ -992,11 +1029,11 @@ ALWAYS_INLINE Instruction::Instruction(InstructionStreamType& stream, bool o32,
|
|||
}
|
||||
|
||||
template<typename InstructionStreamType>
|
||||
ALWAYS_INLINE void MemoryOrRegisterReference::decode(InstructionStreamType& stream, bool a32)
|
||||
ALWAYS_INLINE void MemoryOrRegisterReference::decode(InstructionStreamType& stream, AddressSize address_size)
|
||||
{
|
||||
m_rm_byte = stream.read8();
|
||||
|
||||
if (a32) {
|
||||
if (address_size == AddressSize::Size32) {
|
||||
decode32(stream);
|
||||
switch (m_displacement_bytes) {
|
||||
case 0:
|
||||
|
|
@ -1009,9 +1046,8 @@ ALWAYS_INLINE void MemoryOrRegisterReference::decode(InstructionStreamType& stre
|
|||
break;
|
||||
default:
|
||||
VERIFY_NOT_REACHED();
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
} else if (address_size == AddressSize::Size16) {
|
||||
decode16(stream);
|
||||
switch (m_displacement_bytes) {
|
||||
case 0:
|
||||
|
|
@ -1024,8 +1060,9 @@ ALWAYS_INLINE void MemoryOrRegisterReference::decode(InstructionStreamType& stre
|
|||
break;
|
||||
default:
|
||||
VERIFY_NOT_REACHED();
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
VERIFY_NOT_REACHED();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1095,9 +1132,13 @@ ALWAYS_INLINE void MemoryOrRegisterReference::decode32(InstructionStreamType& st
|
|||
template<typename CPU>
|
||||
ALWAYS_INLINE LogicalAddress MemoryOrRegisterReference::resolve(const CPU& cpu, Instruction const& insn)
|
||||
{
|
||||
if (insn.a32())
|
||||
switch (insn.address_size()) {
|
||||
case AddressSize::Size16:
|
||||
return resolve16(cpu, insn.segment_prefix());
|
||||
case AddressSize::Size32:
|
||||
return resolve32(cpu, insn.segment_prefix());
|
||||
return resolve16(cpu, insn.segment_prefix());
|
||||
}
|
||||
VERIFY_NOT_REACHED();
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue