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synesthesia-1-mod.ys
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; Loosen yices' arbitrary restriction on iteration count. (')
(set-param ef-max-iters 1000)
(define-type Bit (bitvector 1))
(define-type Byte (bitvector 8))
(define-type Word (bitvector 16))
(define-type Dword (bitvector 32))
(define-type RegIdx (bitvector 3))
(define R0Idx::RegIdx (mk-bv 3 0)) ; R0 = 0
(define R1Idx::RegIdx (mk-bv 3 1)) ; R1 = 1
(define R2Idx::RegIdx (mk-bv 3 2)) ; R2 = 2
(define R3Idx::RegIdx (mk-bv 3 3)) ; R3 = 3
(define R4Idx::RegIdx (mk-bv 3 4)) ; R4 = 4
(define R5Idx::RegIdx (mk-bv 3 5)) ; R5 = 5
(define R6Idx::RegIdx (mk-bv 3 6)) ; R6 = 6
(define R7Idx::RegIdx (mk-bv 3 7)) ; R7 = 7
(define-type Reg32State (bitvector 256))
(define-type MachineState (bitvector 264))
(define-type MachineStateRes8 (bitvector 272))
(define-type MachineStateRes16 (bitvector 280))
(define-type MachineStateRes32 (bitvector 296))
(define-type DecodedMachineState (bitvector 268))
(define bytecode00::Byte) (define bytecode01::Byte)
(define bytecode02::Byte) (define bytecode03::Byte)
(define bytecode04::Byte) (define bytecode05::Byte)
(define bytecode06::Byte) (define bytecode07::Byte)
(define bytecode08::Byte) (define bytecode09::Byte)
(define bytecode0A::Byte) (define bytecode0B::Byte)
(define bytecode0C::Byte) (define bytecode0D::Byte)
(define bytecode0E::Byte) (define bytecode0F::Byte)
(define bytecode10::Byte) (define bytecode11::Byte)
(define bytecode12::Byte) (define bytecode13::Byte)
(define bytecode14::Byte) (define bytecode15::Byte)
(define bytecode16::Byte) (define bytecode17::Byte)
(define bytecode18::Byte) (define bytecode19::Byte)
(define bytecode1A::Byte) (define bytecode1B::Byte)
(define bytecode1C::Byte) (define bytecode1D::Byte)
(define bytecode1E::Byte) (define bytecode1F::Byte)
(define bytecode20::Byte) (define bytecode21::Byte)
(define bytecode22::Byte) (define bytecode23::Byte)
(define bytecode24::Byte) (define bytecode25::Byte)
(define bytecode26::Byte) (define bytecode27::Byte)
(define bytecode28::Byte) (define bytecode29::Byte)
(define bytecode2A::Byte) (define bytecode2B::Byte)
(define bytecode2C::Byte) (define bytecode2D::Byte)
(define bytecode2E::Byte) (define bytecode2F::Byte)
(define bytecode30::Byte) (define bytecode31::Byte)
(define bytecode32::Byte) (define bytecode33::Byte)
(define bytecode34::Byte) (define bytecode35::Byte)
(define bytecode36::Byte) (define bytecode37::Byte)
(define bytecode38::Byte) (define bytecode39::Byte)
(define bytecode3A::Byte) (define bytecode3B::Byte)
(define bytecode3C::Byte) (define bytecode3D::Byte)
(define bytecode3E::Byte) (define bytecode3F::Byte)
(define bytecode40::Byte) (define bytecode41::Byte)
(define bytecode42::Byte) (define bytecode43::Byte)
(define bytecode44::Byte) (define bytecode45::Byte)
(define bytecode46::Byte) (define bytecode47::Byte)
(define bytecode48::Byte) (define bytecode49::Byte)
(define bytecode4A::Byte) (define bytecode4B::Byte)
(define bytecode4C::Byte) (define bytecode4D::Byte)
(define bytecode4E::Byte) (define bytecode4F::Byte)
(define bytecode50::Byte) (define bytecode51::Byte)
(define bytecode52::Byte) (define bytecode53::Byte)
(define bytecode54::Byte) (define bytecode55::Byte)
(define bytecode56::Byte) (define bytecode57::Byte)
(define bytecode58::Byte) (define bytecode59::Byte)
(define bytecode5A::Byte) (define bytecode5B::Byte)
(define bytecode5C::Byte) (define bytecode5D::Byte)
(define bytecode5E::Byte) (define bytecode5F::Byte)
(define bytecode60::Byte) (define bytecode61::Byte)
(define bytecode62::Byte) (define bytecode63::Byte)
(define bytecode64::Byte) (define bytecode65::Byte)
(define bytecode66::Byte) (define bytecode67::Byte)
(define bytecode68::Byte) (define bytecode69::Byte)
(define bytecode6A::Byte) (define bytecode6B::Byte)
(define bytecode6C::Byte) (define bytecode6D::Byte)
(define bytecode6E::Byte) (define bytecode6F::Byte)
(define bytecode70::Byte) (define bytecode71::Byte)
(define bytecode72::Byte) (define bytecode73::Byte)
(define bytecode74::Byte) (define bytecode75::Byte)
(define bytecode76::Byte) (define bytecode77::Byte)
(define bytecode78::Byte) (define bytecode79::Byte)
(define bytecode7A::Byte) (define bytecode7B::Byte)
(define bytecode7C::Byte) (define bytecode7D::Byte)
(define bytecode7E::Byte) (define bytecode7F::Byte)
(define bytecode80::Byte) (define bytecode81::Byte)
(define bytecode82::Byte) (define bytecode83::Byte)
(define bytecode84::Byte) (define bytecode85::Byte)
(define bytecode86::Byte) (define bytecode87::Byte)
(define bytecode88::Byte) (define bytecode89::Byte)
(define bytecode8A::Byte) (define bytecode8B::Byte)
(define bytecode8C::Byte) (define bytecode8D::Byte)
(define bytecode8E::Byte) (define bytecode8F::Byte)
(define bytecode90::Byte) (define bytecode91::Byte)
(define bytecode92::Byte) (define bytecode93::Byte)
(define bytecode94::Byte) (define bytecode95::Byte)
(define bytecode96::Byte) (define bytecode97::Byte)
(define bytecode98::Byte) (define bytecode99::Byte)
(define bytecode9A::Byte) (define bytecode9B::Byte)
(define bytecode9C::Byte) (define bytecode9D::Byte)
(define bytecode9E::Byte) (define bytecode9F::Byte)
(define bytecodeA0::Byte) (define bytecodeA1::Byte)
(define bytecodeA2::Byte) (define bytecodeA3::Byte)
(define bytecodeA4::Byte) (define bytecodeA5::Byte)
(define bytecodeA6::Byte) (define bytecodeA7::Byte)
(define bytecodeA8::Byte) (define bytecodeA9::Byte)
(define bytecodeAA::Byte) (define bytecodeAB::Byte)
(define bytecodeAC::Byte) (define bytecodeAD::Byte)
(define bytecodeAE::Byte) (define bytecodeAF::Byte)
(define bytecodeB0::Byte) (define bytecodeB1::Byte)
(define bytecodeB2::Byte) (define bytecodeB3::Byte)
(define bytecodeB4::Byte) (define bytecodeB5::Byte)
(define bytecodeB6::Byte) (define bytecodeB7::Byte)
(define bytecodeB8::Byte) (define bytecodeB9::Byte)
(define bytecodeBA::Byte) (define bytecodeBB::Byte)
(define bytecodeBC::Byte) (define bytecodeBD::Byte)
(define bytecodeBE::Byte) (define bytecodeBF::Byte)
(define bytecodeC0::Byte) (define bytecodeC1::Byte)
(define bytecodeC2::Byte) (define bytecodeC3::Byte)
(define bytecodeC4::Byte) (define bytecodeC5::Byte)
(define bytecodeC6::Byte) (define bytecodeC7::Byte)
(define bytecodeC8::Byte) (define bytecodeC9::Byte)
(define bytecodeCA::Byte) (define bytecodeCB::Byte)
(define bytecodeCC::Byte) (define bytecodeCD::Byte)
(define bytecodeCE::Byte) (define bytecodeCF::Byte)
(define bytecodeD0::Byte) (define bytecodeD1::Byte)
(define bytecodeD2::Byte) (define bytecodeD3::Byte)
(define bytecodeD4::Byte) (define bytecodeD5::Byte)
(define bytecodeD6::Byte) (define bytecodeD7::Byte)
(define bytecodeD8::Byte) (define bytecodeD9::Byte)
(define bytecodeDA::Byte) (define bytecodeDB::Byte)
(define bytecodeDC::Byte) (define bytecodeDD::Byte)
(define bytecodeDE::Byte) (define bytecodeDF::Byte)
(define bytecodeE0::Byte) (define bytecodeE1::Byte)
(define bytecodeE2::Byte) (define bytecodeE3::Byte)
(define bytecodeE4::Byte) (define bytecodeE5::Byte)
(define bytecodeE6::Byte) (define bytecodeE7::Byte)
(define bytecodeE8::Byte) (define bytecodeE9::Byte)
(define bytecodeEA::Byte) (define bytecodeEB::Byte)
(define bytecodeEC::Byte) (define bytecodeED::Byte)
(define bytecodeEE::Byte) (define bytecodeEF::Byte)
(define bytecodeF0::Byte) (define bytecodeF1::Byte)
(define bytecodeF2::Byte) (define bytecodeF3::Byte)
(define bytecodeF4::Byte) (define bytecodeF5::Byte)
(define bytecodeF6::Byte) (define bytecodeF7::Byte)
(define bytecodeF8::Byte) (define bytecodeF9::Byte)
(define bytecodeFA::Byte) (define bytecodeFB::Byte)
(define bytecodeFC::Byte) (define bytecodeFD::Byte)
(define bytecodeFE::Byte) (define bytecodeFF::Byte)
; Used instead of an array lookup. Pass in byte XX, get back the bytecodeXX
; variable.
(define get-byte::(-> Byte Byte)
(lambda (x::Byte)
(ite (= x 0x00) bytecode00
(ite (= x 0x01) bytecode01
(ite (= x 0x02) bytecode02
(ite (= x 0x03) bytecode03
(ite (= x 0x04) bytecode04
(ite (= x 0x05) bytecode05
(ite (= x 0x06) bytecode06
(ite (= x 0x07) bytecode07
(ite (= x 0x08) bytecode08
(ite (= x 0x09) bytecode09
(ite (= x 0x0A) bytecode0A
(ite (= x 0x0B) bytecode0B
(ite (= x 0x0C) bytecode0C
(ite (= x 0x0D) bytecode0D
(ite (= x 0x0E) bytecode0E
(ite (= x 0x0F) bytecode0F
(ite (= x 0x10) bytecode10
(ite (= x 0x11) bytecode11
(ite (= x 0x12) bytecode12
(ite (= x 0x13) bytecode13
(ite (= x 0x14) bytecode14
(ite (= x 0x15) bytecode15
(ite (= x 0x16) bytecode16
(ite (= x 0x17) bytecode17
(ite (= x 0x18) bytecode18
(ite (= x 0x19) bytecode19
(ite (= x 0x1A) bytecode1A
(ite (= x 0x1B) bytecode1B
(ite (= x 0x1C) bytecode1C
(ite (= x 0x1D) bytecode1D
(ite (= x 0x1E) bytecode1E
(ite (= x 0x1F) bytecode1F
(ite (= x 0x20) bytecode20
(ite (= x 0x21) bytecode21
(ite (= x 0x22) bytecode22
(ite (= x 0x23) bytecode23
(ite (= x 0x24) bytecode24
(ite (= x 0x25) bytecode25
(ite (= x 0x26) bytecode26
(ite (= x 0x27) bytecode27
(ite (= x 0x28) bytecode28
(ite (= x 0x29) bytecode29
(ite (= x 0x2A) bytecode2A
(ite (= x 0x2B) bytecode2B
(ite (= x 0x2C) bytecode2C
(ite (= x 0x2D) bytecode2D
(ite (= x 0x2E) bytecode2E
(ite (= x 0x2F) bytecode2F
(ite (= x 0x30) bytecode30
(ite (= x 0x31) bytecode31
(ite (= x 0x32) bytecode32
(ite (= x 0x33) bytecode33
(ite (= x 0x34) bytecode34
(ite (= x 0x35) bytecode35
(ite (= x 0x36) bytecode36
(ite (= x 0x37) bytecode37
(ite (= x 0x38) bytecode38
(ite (= x 0x39) bytecode39
(ite (= x 0x3A) bytecode3A
(ite (= x 0x3B) bytecode3B
(ite (= x 0x3C) bytecode3C
(ite (= x 0x3D) bytecode3D
(ite (= x 0x3E) bytecode3E
(ite (= x 0x3F) bytecode3F
(ite (= x 0x40) bytecode40
(ite (= x 0x41) bytecode41
(ite (= x 0x42) bytecode42
(ite (= x 0x43) bytecode43
(ite (= x 0x44) bytecode44
(ite (= x 0x45) bytecode45
(ite (= x 0x46) bytecode46
(ite (= x 0x47) bytecode47
(ite (= x 0x48) bytecode48
(ite (= x 0x49) bytecode49
(ite (= x 0x4A) bytecode4A
(ite (= x 0x4B) bytecode4B
(ite (= x 0x4C) bytecode4C
(ite (= x 0x4D) bytecode4D
(ite (= x 0x4E) bytecode4E
(ite (= x 0x4F) bytecode4F
(ite (= x 0x50) bytecode50
(ite (= x 0x51) bytecode51
(ite (= x 0x52) bytecode52
(ite (= x 0x53) bytecode53
(ite (= x 0x54) bytecode54
(ite (= x 0x55) bytecode55
(ite (= x 0x56) bytecode56
(ite (= x 0x57) bytecode57
(ite (= x 0x58) bytecode58
(ite (= x 0x59) bytecode59
(ite (= x 0x5A) bytecode5A
(ite (= x 0x5B) bytecode5B
(ite (= x 0x5C) bytecode5C
(ite (= x 0x5D) bytecode5D
(ite (= x 0x5E) bytecode5E
(ite (= x 0x5F) bytecode5F
(ite (= x 0x60) bytecode60
(ite (= x 0x61) bytecode61
(ite (= x 0x62) bytecode62
(ite (= x 0x63) bytecode63
(ite (= x 0x64) bytecode64
(ite (= x 0x65) bytecode65
(ite (= x 0x66) bytecode66
(ite (= x 0x67) bytecode67
(ite (= x 0x68) bytecode68
(ite (= x 0x69) bytecode69
(ite (= x 0x6A) bytecode6A
(ite (= x 0x6B) bytecode6B
(ite (= x 0x6C) bytecode6C
(ite (= x 0x6D) bytecode6D
(ite (= x 0x6E) bytecode6E
(ite (= x 0x6F) bytecode6F
(ite (= x 0x70) bytecode70
(ite (= x 0x71) bytecode71
(ite (= x 0x72) bytecode72
(ite (= x 0x73) bytecode73
(ite (= x 0x74) bytecode74
(ite (= x 0x75) bytecode75
(ite (= x 0x76) bytecode76
(ite (= x 0x77) bytecode77
(ite (= x 0x78) bytecode78
(ite (= x 0x79) bytecode79
(ite (= x 0x7A) bytecode7A
(ite (= x 0x7B) bytecode7B
(ite (= x 0x7C) bytecode7C
(ite (= x 0x7D) bytecode7D
(ite (= x 0x7E) bytecode7E
(ite (= x 0x7F) bytecode7F
(ite (= x 0x80) bytecode80
(ite (= x 0x81) bytecode81
(ite (= x 0x82) bytecode82
(ite (= x 0x83) bytecode83
(ite (= x 0x84) bytecode84
(ite (= x 0x85) bytecode85
(ite (= x 0x86) bytecode86
(ite (= x 0x87) bytecode87
(ite (= x 0x88) bytecode88
(ite (= x 0x89) bytecode89
(ite (= x 0x8A) bytecode8A
(ite (= x 0x8B) bytecode8B
(ite (= x 0x8C) bytecode8C
(ite (= x 0x8D) bytecode8D
(ite (= x 0x8E) bytecode8E
(ite (= x 0x8F) bytecode8F
(ite (= x 0x90) bytecode90
(ite (= x 0x91) bytecode91
(ite (= x 0x92) bytecode92
(ite (= x 0x93) bytecode93
(ite (= x 0x94) bytecode94
(ite (= x 0x95) bytecode95
(ite (= x 0x96) bytecode96
(ite (= x 0x97) bytecode97
(ite (= x 0x98) bytecode98
(ite (= x 0x99) bytecode99
(ite (= x 0x9A) bytecode9A
(ite (= x 0x9B) bytecode9B
(ite (= x 0x9C) bytecode9C
(ite (= x 0x9D) bytecode9D
(ite (= x 0x9E) bytecode9E
(ite (= x 0x9F) bytecode9F
(ite (= x 0xA0) bytecodeA0
(ite (= x 0xA1) bytecodeA1
(ite (= x 0xA2) bytecodeA2
(ite (= x 0xA3) bytecodeA3
(ite (= x 0xA4) bytecodeA4
(ite (= x 0xA5) bytecodeA5
(ite (= x 0xA6) bytecodeA6
(ite (= x 0xA7) bytecodeA7
(ite (= x 0xA8) bytecodeA8
(ite (= x 0xA9) bytecodeA9
(ite (= x 0xAA) bytecodeAA
(ite (= x 0xAB) bytecodeAB
(ite (= x 0xAC) bytecodeAC
(ite (= x 0xAD) bytecodeAD
(ite (= x 0xAE) bytecodeAE
(ite (= x 0xAF) bytecodeAF
(ite (= x 0xB0) bytecodeB0
(ite (= x 0xB1) bytecodeB1
(ite (= x 0xB2) bytecodeB2
(ite (= x 0xB3) bytecodeB3
(ite (= x 0xB4) bytecodeB4
(ite (= x 0xB5) bytecodeB5
(ite (= x 0xB6) bytecodeB6
(ite (= x 0xB7) bytecodeB7
(ite (= x 0xB8) bytecodeB8
(ite (= x 0xB9) bytecodeB9
(ite (= x 0xBA) bytecodeBA
(ite (= x 0xBB) bytecodeBB
(ite (= x 0xBC) bytecodeBC
(ite (= x 0xBD) bytecodeBD
(ite (= x 0xBE) bytecodeBE
(ite (= x 0xBF) bytecodeBF
(ite (= x 0xC0) bytecodeC0
(ite (= x 0xC1) bytecodeC1
(ite (= x 0xC2) bytecodeC2
(ite (= x 0xC3) bytecodeC3
(ite (= x 0xC4) bytecodeC4
(ite (= x 0xC5) bytecodeC5
(ite (= x 0xC6) bytecodeC6
(ite (= x 0xC7) bytecodeC7
(ite (= x 0xC8) bytecodeC8
(ite (= x 0xC9) bytecodeC9
(ite (= x 0xCA) bytecodeCA
(ite (= x 0xCB) bytecodeCB
(ite (= x 0xCC) bytecodeCC
(ite (= x 0xCD) bytecodeCD
(ite (= x 0xCE) bytecodeCE
(ite (= x 0xCF) bytecodeCF
(ite (= x 0xD0) bytecodeD0
(ite (= x 0xD1) bytecodeD1
(ite (= x 0xD2) bytecodeD2
(ite (= x 0xD3) bytecodeD3
(ite (= x 0xD4) bytecodeD4
(ite (= x 0xD5) bytecodeD5
(ite (= x 0xD6) bytecodeD6
(ite (= x 0xD7) bytecodeD7
(ite (= x 0xD8) bytecodeD8
(ite (= x 0xD9) bytecodeD9
(ite (= x 0xDA) bytecodeDA
(ite (= x 0xDB) bytecodeDB
(ite (= x 0xDC) bytecodeDC
(ite (= x 0xDD) bytecodeDD
(ite (= x 0xDE) bytecodeDE
(ite (= x 0xDF) bytecodeDF
(ite (= x 0xE0) bytecodeE0
(ite (= x 0xE1) bytecodeE1
(ite (= x 0xE2) bytecodeE2
(ite (= x 0xE3) bytecodeE3
(ite (= x 0xE4) bytecodeE4
(ite (= x 0xE5) bytecodeE5
(ite (= x 0xE6) bytecodeE6
(ite (= x 0xE7) bytecodeE7
(ite (= x 0xE8) bytecodeE8
(ite (= x 0xE9) bytecodeE9
(ite (= x 0xEA) bytecodeEA
(ite (= x 0xEB) bytecodeEB
(ite (= x 0xEC) bytecodeEC
(ite (= x 0xED) bytecodeED
(ite (= x 0xEE) bytecodeEE
(ite (= x 0xEF) bytecodeEF
(ite (= x 0xF0) bytecodeF0
(ite (= x 0xF1) bytecodeF1
(ite (= x 0xF2) bytecodeF2
(ite (= x 0xF3) bytecodeF3
(ite (= x 0xF4) bytecodeF4
(ite (= x 0xF5) bytecodeF5
(ite (= x 0xF6) bytecodeF6
(ite (= x 0xF7) bytecodeF7
(ite (= x 0xF8) bytecodeF8
(ite (= x 0xF9) bytecodeF9
(ite (= x 0xFA) bytecodeFA
(ite (= x 0xFB) bytecodeFB
(ite (= x 0xFC) bytecodeFC
(ite (= x 0xFD) bytecodeFD
(ite (= x 0xFE) bytecodeFE
(ite (= x 0xFF) bytecodeFF
bytecode04))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
)
)
; getreg32(reg,state). Return the value of register 'reg' from state 'state'.
(define getreg32::(-> RegIdx Reg32State Dword)
(lambda (x::RegIdx z::Reg32State)
(ite (= x 0b000) (bv-extract 31 0 z)
(ite (= x 0b001) (bv-extract 63 32 z)
(ite (= x 0b010) (bv-extract 95 64 z)
(ite (= x 0b011) (bv-extract 127 96 z)
(ite (= x 0b100) (bv-extract 159 128 z)
(ite (= x 0b101) (bv-extract 191 160 z)
(ite (= x 0b110) (bv-extract 223 192 z)
(bv-extract 255 224 z)
)))))))
)
)
; putreg32(reg,state,value). Update register 'reg' to value 'value' in state
; 'state'; return the new state.
(define putreg32::(-> RegIdx Dword Reg32State Reg32State)
(lambda (x::RegIdx y::Dword z::Reg32State)
(ite (= x 0b000) (bv-concat (bv-extract 255 32 z) y)
(ite (= x 0b001) (bv-concat (bv-extract 255 64 z) y (bv-extract 31 0 z))
(ite (= x 0b010) (bv-concat (bv-extract 255 96 z) y (bv-extract 63 0 z))
(ite (= x 0b011) (bv-concat (bv-extract 255 128 z) y (bv-extract 95 0 z))
(ite (= x 0b100) (bv-concat (bv-extract 255 160 z) y (bv-extract 127 0 z))
(ite (= x 0b101) (bv-concat (bv-extract 255 192 z) y (bv-extract 159 0 z))
(ite (= x 0b110) (bv-concat (bv-extract 255 224 z) y (bv-extract 191 0 z))
(bv-concat y (bv-extract 223 0 z))
)))))))
)
)
; symbolic-insn(eip,state). Decode an instruction at eip 'eip'. Perform the
; operation specified by that instruction. Consult and update the state 'state'
; accordingly; return the new state concatenated with the length of the
; instruction. In other words, this function simulates the effects of executing
; every possible instruction.
(define symbolic-insn::(-> (-> Byte Byte) Byte Reg32State (bitvector 264))
(lambda (f-get-byte::(-> Byte Byte) eip::Byte state::Reg32State)
(let ((byte0 (f-get-byte eip)))
(let ((byte1 (f-get-byte (bv-add 0x01 eip))))
(let ((byte2 (f-get-byte (bv-add 0x02 eip))))
(let ((byte3 (f-get-byte (bv-add 0x03 eip))))
(let ((byte4 (f-get-byte (bv-add 0x04 eip))))
; xor reg, reg
(ite (= (bv-and byte0 0xC0) 0x00)
(let ((lhsreg0 (bv-extract 5 3 byte0)))
(let ((rhsreg0 (bv-extract 2 0 byte0)))
(let ((newstate (putreg32 lhsreg0 (bv-xor (getreg32 lhsreg0 state) (getreg32 rhsreg0 state)) state)))
(bv-concat 0x01 newstate)
)))
; add reg, reg
(ite (= (bv-and byte0 0xC0) 0x40)
(let ((lhsreg0 (bv-extract 5 3 byte0)))
(let ((rhsreg0 (bv-extract 2 0 byte0)))
(let ((newstate (putreg32 lhsreg0 (bv-add (getreg32 lhsreg0 state) (getreg32 rhsreg0 state)) state)))
(bv-concat 0x01 newstate)
)))
; mov reg, reg
(ite (= (bv-and byte0 0xC0) 0x80)
(let ((lhsreg0 (bv-extract 5 3 byte0)))
(let ((rhsreg0 (bv-extract 2 0 byte0)))
(let ((newstate (putreg32 lhsreg0 (getreg32 rhsreg0 state) state)))
(bv-concat 0x01 newstate)
)))
; complex 0xC0 case
(let ((opcode (bv-extract 5 3 byte0)))
(let ((lhsreg0 (bv-extract 2 0 byte0)))
; inc reg
(ite (= opcode 0b000)
(let ((newstate (putreg32 lhsreg0 (bv-add (getreg32 lhsreg0 state) 0x00000001) state)))
(bv-concat 0x01 newstate))
; dec reg
(ite (= opcode 0b001)
(let ((newstate (putreg32 lhsreg0 (bv-sub (getreg32 lhsreg0 state) 0x00000001) state)))
(bv-concat 0x01 newstate))
; neg reg
(ite (= opcode 0b010)
(let ((newstate (putreg32 lhsreg0 (bv-neg (getreg32 lhsreg0 state)) state)))
(bv-concat 0x01 newstate))
; not reg
(ite (= opcode 0b011)
(let ((newstate (putreg32 lhsreg0 (bv-not (getreg32 lhsreg0 state)) state)))
(bv-concat 0x01 newstate))
(let ((rhsval0 (bv-concat byte4 byte3 byte2 byte1)))
; add reg, imm32
(ite (= opcode 0b100)
(let ((newstate (putreg32 lhsreg0 (bv-add (getreg32 lhsreg0 state) rhsval0) state)))
(bv-concat 0x05 newstate))
; xor reg, imm32
(ite (= opcode 0b101)
(let ((newstate (putreg32 lhsreg0 (bv-xor (getreg32 lhsreg0 state) rhsval0) state)))
(bv-concat 0x05 newstate))
; and reg, imm32
(ite (= opcode 0b110)
(let ((newstate (putreg32 lhsreg0 (bv-and (getreg32 lhsreg0 state) rhsval0) state)))
(bv-concat 0x05 newstate))
; opcode == 0b111
; or reg, imm32
(let ((newstate (putreg32 lhsreg0 (bv-or (getreg32 lhsreg0 state) rhsval0) state)))
(bv-concat 0x05 newstate)))))))))))))))
)))))
)
)
; The main assertion.
(assert
; For every possible input state (r0, ..., r7).
; There is an additional universally-quantified variable idx: used to make
; statements about the bytes in the encoding.
(forall (r0::Dword r1::Dword r2::Dword r3::Dword r4::Dword r5::Dword r6::Dword r7::Dword idx::Byte)
; ------------------------
; INITIALIZE STATE AND EIP
; ------------------------
; Create the input "state" by concatenating all of the inputs.
(let ((state0 (bv-concat r7 r6 r5 r4 r3 r2 r1 r0)))
; Set initial EIP to zero.
(let ((eip0 0x00))
; ------------------------
; SIMULATE ONE INSTRUCTION
; ------------------------
; Perform symbolic simulation of one instruction (any instruction).
(let ((synsem0 (symbolic-insn get-byte eip0 state0)))
; Extract the length of the instruction.
(let ((insn0len (bv-extract 263 256 synsem0)))
; Extract the output state after having executed the instruction.
(let ((state1 (bv-extract 255 0 synsem0)))
; Extract EIP after executing the instruction.
(let ((eip1 (bv-add eip0 insn0len)))
; ------------------------
; SIMULATE ONE INSTRUCTION
; ------------------------
; Perform symbolic simulation of one instruction (any instruction).
(let ((synsem1 (symbolic-insn get-byte eip1 state1)))
; Extract the length of the instruction.
(let ((insn1len (bv-extract 263 256 synsem1)))
; Extract the output state after having executed the instruction.
(let ((state2 (bv-extract 255 0 synsem1)))
; Extract EIP after executing the instruction.
(let ((eip2 (bv-add eip1 insn1len)))
; ----------------------
; FINALIZE STATE AND EIP
; ----------------------
; Call the final state "finalstate" (for convenience).
(let ((finalstate state2))
; Call the final EIP "finaleip" (for convenience).
(let ((finaleip eip2))
; --------------------------------------------------
; ISSUE CONSTRAINTS ABOUT FUNCTIONALITY AND ENCODING
; --------------------------------------------------
(and
; 0-length instructions are invalid; both instructions must be valid.
(not (= insn0len 0x00))
(not (= insn1len 0x00))
; -----------------------------------
; CONSTRAINTS REGARDING FUNCTIONALITY
; -----------------------------------
; Effect on state: r0 becomes 0x12345678; all other registers preserved.
(= (getreg32 R0Idx finalstate) (bv-add r0 0x00000001))
(= (getreg32 R1Idx finalstate) r1)
(= (getreg32 R2Idx finalstate) r2)
(= (getreg32 R3Idx finalstate) r3)
(= (getreg32 R4Idx finalstate) r4)
(= (getreg32 R5Idx finalstate) r5)
(= (getreg32 R6Idx finalstate) r6)
(= (getreg32 R7Idx finalstate) r7)
; ------------------------------
; CONSTRAINTS REGARDING ENCODING
; ------------------------------
; None of the bytes are 0x12
; (=> (bv-lt idx finaleip) (/= (get-byte idx) 0x12))
; None of the bytes are 0x34
; (=> (bv-lt idx finaleip) (/= (get-byte idx) 0x34))
; None of the bytes are 0x56
; (=> (bv-lt idx finaleip) (/= (get-byte idx) 0x56))
; None of the bytes are 0x78
; (=> (bv-lt idx finaleip) (/= (get-byte idx) 0x78))
; None of the bytes are 0x00 (commented out)
; (=> (bv-lt idx finaleip) (/= (get-byte idx) 0x00))
) ; end and
)))))))))))) ; end let * 12
) ; end forall
) ; end assert
; Solve the constraint system
(ef-solve)
; Produce a model, i.e., values for bytecode00-bytecodeFF.
; This statement will crash yices if (ef-solve) returned unsatisfiable.
(show-model)