diff options
Diffstat (limited to 'src/real_mode')
| -rw-r--r-- | src/real_mode/behavior.rs | 38 | ||||
| -rw-r--r-- | src/real_mode/display.rs | 13 | ||||
| -rw-r--r-- | src/real_mode/mod.rs | 40 |
3 files changed, 64 insertions, 27 deletions
diff --git a/src/real_mode/behavior.rs b/src/real_mode/behavior.rs index cc7f705..8941ee5 100644 --- a/src/real_mode/behavior.rs +++ b/src/real_mode/behavior.rs @@ -140,22 +140,6 @@ impl Instruction { .set_operand(1, Access::Read) .set_operand(2, Access::Read); } - } else if self.opcode == Opcode::PUSHA { - if self.prefixes.operand_size() { - behavior = behavior - .set_implicit_ops(PUSHAD_IDX); - } else { - behavior = behavior - .set_implicit_ops(PUSHA_IDX); - } - } else if self.opcode == Opcode::POPA { - if self.prefixes.operand_size() { - behavior = behavior - .set_implicit_ops(POPAD_IDX); - } else { - behavior = behavior - .set_implicit_ops(POPA_IDX); - } } else if self.opcode == Opcode::DIV || self.opcode == Opcode::IDIV { let op_width = if self.operands[0] == OperandSpec::RegMMM { self.regs[1].width() @@ -257,8 +241,7 @@ impl Instruction { } } else if self.opcode() == Opcode::LOOPNZ || self.opcode() == Opcode::LOOPZ - || self.opcode() == Opcode::LOOP - || self.opcode() == Opcode::JCXZ { + || self.opcode() == Opcode::LOOP { if !self.prefixes.operand_size() { behavior = behavior .set_implicit_ops(RW_CX_IDX); @@ -3808,7 +3791,7 @@ fn behavior_table_size_is_right() { } /// this table MUST line up with Opcode declaration order in `mod.rs`. -static TABLE: [BehaviorDigest; 1425] = [ +static TABLE: [BehaviorDigest; 1428] = [ /* ADD => */ GENERAL_RW_R_FLAGWRITE, /* OR => */ GENERAL_RW_R_FLAGWRITE, /* ADC => */ GENERAL_RW_R_FLAGRW, @@ -5424,14 +5407,14 @@ static TABLE: [BehaviorDigest; 1425] = [ /* JCXZ => */ BehaviorDigest::empty() .set_pl_any() .set_operand(0, Access::Read) - .set_nontrivial(true), + .set_implicit_ops(RW_CX_IDX), /* PUSHA => */ BehaviorDigest::empty() .set_pl_any() - .set_nontrivial(true), + .set_implicit_ops(PUSHA_IDX), /* POPA => */ BehaviorDigest::empty() .set_pl_any() - .set_nontrivial(true), + .set_implicit_ops(POPA_IDX), /* BOUND => */ BehaviorDigest::empty() .set_pl_any() .set_operand(0, Access::Read) @@ -6170,4 +6153,15 @@ static TABLE: [BehaviorDigest; 1425] = [ .set_pl0() .set_flags_access(Access::Write) .set_complex(true), + + /* PUSHAD => */ BehaviorDigest::empty() + .set_pl_any() + .set_implicit_ops(PUSHAD_IDX), + /* POPAD => */ BehaviorDigest::empty() + .set_pl_any() + .set_implicit_ops(POPAD_IDX), + /* JECXZ => */ BehaviorDigest::empty() + .set_pl_any() + .set_operand(0, Access::Read) + .set_implicit_ops(RW_ECX_IDX), ]; diff --git a/src/real_mode/display.rs b/src/real_mode/display.rs index e686b0a..888b0b1 100644 --- a/src/real_mode/display.rs +++ b/src/real_mode/display.rs @@ -2094,6 +2094,10 @@ const MNEMONICS: &[&'static str] = &[ "pvalidate", "rmpadjust", "rmpupdate", + + "pushad", + "popad", + "jecxz", ]; impl Opcode { @@ -2572,6 +2576,10 @@ pub(crate) fn contextualize_c<T: DisplaySink>(instr: &Instruction, out: &mut T) out.write_str("jmp ")?; write_jmp_operand(instr.operand(0), out)?; }, + Opcode::JECXZ => { + out.write_str("if ecx == 0 then jmp ")?; + write_jmp_operand(instr.operand(0), out)?; + }, Opcode::JCXZ => { out.write_str("if cx == 0 then jmp ")?; write_jmp_operand(instr.operand(0), out)?; @@ -2766,8 +2774,9 @@ impl <T: fmt::Write, Y: YaxColors> ShowContextual<u64, [Option<alloc::string::St } } -static RELATIVE_BRANCHES: [Opcode; 22] = [ - Opcode::JMP, Opcode::CALL, Opcode::JCXZ, +static RELATIVE_BRANCHES: [Opcode; 23] = [ + Opcode::JMP, Opcode::CALL, + Opcode::JECXZ, Opcode::JCXZ, Opcode::LOOP, Opcode::LOOPZ, Opcode::LOOPNZ, Opcode::JO, Opcode::JNO, Opcode::JB, Opcode::JNB, diff --git a/src/real_mode/mod.rs b/src/real_mode/mod.rs index f538fa5..8dd29b1 100644 --- a/src/real_mode/mod.rs +++ b/src/real_mode/mod.rs @@ -2508,6 +2508,13 @@ pub enum Opcode { PVALIDATE, RMPADJUST, RMPUPDATE, + + // these were part of the base (i386) ISA but were reported as distinct opcodes relatively late. + PUSHAD, + POPAD, + + // likewise with alternate-size jecxz/jcxz.. + JECXZ, } impl PartialEq for Instruction { @@ -3992,6 +3999,7 @@ enum OperandCase { ModRM_0xf30f38fa, ModRM_0xf30f38fb, ModRM_0xf30f3af0, + CXZ, // catch-all for "j*cxz and prefix handling" } #[allow(non_camel_case_types)] @@ -4319,6 +4327,7 @@ enum OperandCode { ModRM_0xc4 = OperandCodeBuilder::new().operand_case(OperandCase::ModRM_0xc4).bits(), ModRM_0xc5 = OperandCodeBuilder::new().operand_case(OperandCase::ModRM_0xc5).bits(), MASKMOVDQU = OperandCodeBuilder::new().read_E().reg_mem().operand_case(OperandCase::MASKMOVDQU).bits(), + CXZ = OperandCodeBuilder::new().operand_case(OperandCase::CXZ).bits(), } fn base_opcode_map(v: u8) -> Opcode { @@ -4622,7 +4631,7 @@ const OPCODES: [OpcodeRecord; 256] = [ OpcodeRecord::new(Interpretation::Instruction(Opcode::LOOPNZ), OperandCode::Ibs), OpcodeRecord::new(Interpretation::Instruction(Opcode::LOOPZ), OperandCode::Ibs), OpcodeRecord::new(Interpretation::Instruction(Opcode::LOOP), OperandCode::Ibs), - OpcodeRecord::new(Interpretation::Instruction(Opcode::JCXZ), OperandCode::Ibs), + OpcodeRecord::new(Interpretation::Instruction(Opcode::JCXZ), OperandCode::CXZ), OpcodeRecord::new(Interpretation::Instruction(Opcode::IN), OperandCode::AL_Ib), OpcodeRecord::new(Interpretation::Instruction(Opcode::IN), OperandCode::AX_Ib), OpcodeRecord::new(Interpretation::Instruction(Opcode::OUT), OperandCode::Ib_AL), @@ -6510,9 +6519,19 @@ fn read_operands< } else if instruction.opcode == Opcode::XLAT { instruction.mem_size = 1; } else if instruction.opcode == Opcode::PUSHA { - instruction.mem_size = 2 * 8; + if !instruction.prefixes.operand_size() { + instruction.mem_size = 2 * 8; + } else { + instruction.opcode = Opcode::PUSHAD; + instruction.mem_size = 4 * 8; + } } else if instruction.opcode == Opcode::POPA { - instruction.mem_size = 2 * 8; + if !instruction.prefixes.operand_size() { + instruction.mem_size = 2 * 8; + } else { + instruction.opcode = Opcode::POPAD; + instruction.mem_size = 4 * 8; + } } instruction.operands[0] = OperandSpec::Nothing; instruction.operand_count = 0; @@ -9050,6 +9069,21 @@ fn read_operands< instruction.mem_size = 2; instruction.operand_count = 2; }, + OperandCase::CXZ => { + if instruction.prefixes.address_size() { + // address-size overridden from 16-bit to 32-bit + instruction.opcode = Opcode::JECXZ; + } + instruction.imm = + read_imm_signed(words, 1)? as u32; + sink.record( + words.offset() as u32 * 8 - 8, + words.offset() as u32 * 8 - 1, + InnerDescription::Number("1-byte immediate", instruction.imm as i64) + .with_id(words.offset() as u32 * 8), + ); + instruction.operands[0] = OperandSpec::ImmI8; + }, }; Ok(()) } |