521 lines
26 KiB
Plaintext
521 lines
26 KiB
Plaintext
# new data structure: a slice is an open interval of addresses [start, end)
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# that includes 'start' but not 'end'
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== code
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# instruction effective address register displacement immediate
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# . op subop mod rm32 base index scale r32
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# . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes
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# main:
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e8/call run-tests/disp32 # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
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# syscall(exit, Num-test-failures)
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8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX
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b8/copy-to-EAX 1/imm32/exit
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cd/syscall 0x80/imm8
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slice-empty?: # s : (address slice) -> EAX : boolean
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# . save registers
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51/push-ECX
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# ECX = s
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8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX
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# if s->start == s->end return true
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# . EAX = s->start
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8b/copy 0/mod/indirect 1/rm32/ECX . . . 0/r32/EAX . . # copy *ECX to EAX
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# . compare EAX with s->end
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39/compare 1/mod/*+disp8 1/rm32/ECX . . . 0/r32/EAX 4/disp8 . # compare EAX and *(ECX+4)
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b8/copy-to-EAX 1/imm32/true
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74/jump-if-equal $slice-empty?:end/disp8
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b8/copy-to-EAX 0/imm32/false
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$slice-empty?:end:
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# . restore registers
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59/pop-to-ECX
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-empty-true:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = {34, 34}
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68/push 34/imm32/end
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68/push 34/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# slice-empty?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call slice-empty?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 1, msg)
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# . . push args
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68/push "F - test-slice-empty-true"/imm32
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68/push 1/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-empty-false:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX = {34, 23}
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68/push 23/imm32/end
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68/push 34/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# slice-empty?(slice)
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# . . push args
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51/push-ECX
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# . . call
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e8/call slice-empty?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-slice-empty-false"/imm32
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68/push 0/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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slice-equal?: # s : (address slice), p : (address string) -> EAX : boolean
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# . save registers
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51/push-ECX
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52/push-EDX
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53/push-EBX
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56/push-ESI
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# ESI = s
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8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI
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# curr/EDX = s->start
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8b/copy 0/mod/indirect 6/rm32/ESI . . . 2/r32/EDX . . # copy *ESI to EDX
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# max/ESI = s->end
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8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 6/r32/ESI 4/disp8 . # copy *(ESI+4) to ESI
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# EBX = p
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8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 3/r32/EBX 0xc/disp8 . # copy *(EBP+12) to EBX
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# EAX = s->end - s->start
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89/copy 3/mod/direct 0/rm32/EAX . . . 6/r32/ESI . . # copy ESI to EAX
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29/subtract 3/mod/direct 0/rm32/EAX . . . 2/r32/EDX . . # subtract EDX from EAX
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# if (EAX != p->length) return false;
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39/compare 0/mod/indirect 3/rm32/EBX . . . 0/r32/EAX . . # compare *EBX and EAX
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75/jump-if-not-equal $slice-equal?:false/disp8
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# skip p->length
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81 0/subop/add 3/mod/direct 3/rm32/EBX . . . . . 4/imm32 # add to EBX
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# EAX = ECX = false
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31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
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31/xor 3/mod/direct 1/rm32/ECX . . . 1/r32/ECX . . # clear ECX
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$slice-equal?:loop:
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# if (curr >= max) return true
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39/compare 3/mod/direct 2/rm32/EDX . . . 6/r32/ESI . . # compare EDX and ESI
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7d/jump-if-greater-or-equal $slice-equal?:true/disp8
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# AL = *p
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8a/copy-byte 0/mod/indirect 3/rm32/EBX . . . 0/r32/AL . . # copy byte at *EBX to AL
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# CL = *curr
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8a/copy-byte 0/mod/indirect 2/rm32/EDX . . . 1/r32/CL . . # copy byte at *EDX to CL
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# if (EAX != ECX) return false
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39/compare 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # compare EAX and ECX
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75/jump-if-not-equal $slice-equal?:false/disp8
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# ++p
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43/increment-EBX
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# ++curr
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42/increment-EDX
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eb/jump $slice-equal?:loop/disp8
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$slice-equal?:false:
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b8/copy-to-EAX 0/imm32
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eb/jump $slice-equal?:end/disp8
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$slice-equal?:true:
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b8/copy-to-EAX 1/imm32
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$slice-equal?:end:
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# . restore registers
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5e/pop-to-ESI
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5b/pop-to-EBX
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5a/pop-to-EDX
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59/pop-to-ECX
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-equal:
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# - slice-equal?(slice("Abc"), "Abc") == 1
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX
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68/push _test-slice-data-3/imm32/end
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68/push _test-slice-data-0/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = slice-equal?(ECX, "Abc")
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# . . push args
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68/push "Abc"/imm32
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51/push-ECX
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# check-ints-equal(EAX, 1, msg)
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# . . push args
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68/push "F - test-slice-equal"/imm32
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68/push 1/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-equal-false:
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# - slice-equal?(slice("bcd"), "Abc") == 0
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX
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68/push _test-slice-data-4/imm32/end
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68/push _test-slice-data-1/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = slice-equal?(ECX, "Abc")
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# . . push args
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68/push "Abc"/imm32
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51/push-ECX
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-slice-equal-false"/imm32
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68/push 0/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-equal-too-long:
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# - slice-equal?(slice("Abcd"), "Abc") == 0
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX
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68/push _test-slice-data-4/imm32/end
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68/push _test-slice-data-0/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = slice-equal?(ECX, "Abc")
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# . . push args
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68/push "Abc"/imm32
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51/push-ECX
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-slice-equal-too-long"/imm32
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68/push 0/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-equal-too-short:
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# - slice-equal?(slice("A"), "Abc") == 0
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX
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68/push _test-slice-data-1/imm32/end
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68/push _test-slice-data-0/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = slice-equal?(ECX, "Abc")
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# . . push args
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68/push "Abc"/imm32
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51/push-ECX
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-slice-equal-too-short"/imm32
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68/push 0/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-equal-empty:
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# - slice-equal?(slice(""), "Abc") == 0
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX
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68/push _test-slice-data-0/imm32/end
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68/push _test-slice-data-0/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = slice-equal?(ECX, "Abc")
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# . . push args
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68/push "Abc"/imm32
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51/push-ECX
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-slice-equal-empty"/imm32
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68/push 0/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-equal-with-empty:
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# - slice-equal?(slice("Ab"), "") == 0
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX
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68/push _test-slice-data-2/imm32/end
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68/push _test-slice-data-0/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = slice-equal?(ECX, "")
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# . . push args
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68/push ""/imm32
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51/push-ECX
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# check-ints-equal(EAX, 0, msg)
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# . . push args
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68/push "F - test-slice-equal-with-empty"/imm32
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68/push 0/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-slice-equal-empty-with-empty:
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# - slice-equal?(slice(""), "") == 1
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# var slice/ECX
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68/push _test-slice-data-0/imm32/end
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68/push _test-slice-data-0/imm32/start
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# EAX = slice-equal?(ECX, "")
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# . . push args
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68/push ""/imm32
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51/push-ECX
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# check-ints-equal(EAX, 1, msg)
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# . . push args
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68/push "F - test-slice-equal-empty-with-empty"/imm32
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68/push 1/imm32
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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write-slice: # out : (address buffered-file), s : (address slice)
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# . save registers
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50/push-EAX
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51/push-ECX
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52/push-EDX
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53/push-EBX
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56/push-ESI
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57/push-EDI
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# ESI = s
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8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI
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# curr/ECX = s->start
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8b/copy 0/mod/indirect 6/rm32/ESI . . . 1/r32/ECX . . # copy *ESI to ECX
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# max/ESI = s->end
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8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 6/r32/ESI 4/disp8 . # copy *(ESI+4) to ESI
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# EDI = f
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8b/copy 1/mod/*+disp8 5/rm32/EBP . . 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI
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|
# EDX = f->length
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|
8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 2/r32/EDX 0xc/disp8 . # copy *(EDI+12) to EDX
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|
# EBX = f->write
|
|
8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy *(EDI+4) to EBX
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|
$write-slice:loop:
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|
# if (curr >= max) break
|
|
39/compare 3/mod/direct 1/rm32/ECX . . . 6/r32/ESI . . # compare ECX with ESI
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|
7d/jump-if-greater-or-equal $write-slice:loop-end/disp8
|
|
# if (f->write >= f->length) flush and clear f's stream
|
|
39/compare 3/mod/direct 3/rm32/EBX . . . 2/r32/EDX . . # compare EBX with EDX
|
|
7c/jump-if-lesser $write-slice:to-stream/disp8
|
|
# . persist f->write
|
|
89/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy EBX to *(EDI+4)
|
|
# . flush(f)
|
|
# . . push args
|
|
57/push-EDI
|
|
# . . call
|
|
e8/call flush/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# . clear-stream(stream = f+4)
|
|
# . . push args
|
|
8d/copy-address 1/mod/*+disp8 7/rm32/EDI . . . 0/r32/EAX 4/disp8 . # copy EDI+4 to EAX
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# . f->write must now be 0; update its cache at EBX
|
|
31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX
|
|
$write-slice:to-stream:
|
|
# f->data[f->write] = *in
|
|
# . AL = *in
|
|
31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
|
|
8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL
|
|
# . f->data[f->write] = AL
|
|
88/copy-byte 1/mod/*+disp8 4/rm32/sib 7/base/EDI 3/index/EBX . 0/r32/AL 0x10/disp8 . # copy AL to *(EDI+EBX+16)
|
|
# ++f->write
|
|
43/increment-EBX
|
|
# ++in
|
|
41/increment-ECX
|
|
eb/jump $write-slice:loop/disp8
|
|
$write-slice:loop-end:
|
|
# persist necessary variables from registers
|
|
89/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy EBX to *(EDI+4)
|
|
$write-slice:end:
|
|
# . restore registers
|
|
5f/pop-to-EDI
|
|
5e/pop-to-ESI
|
|
5b/pop-to-EBX
|
|
5a/pop-to-EDX
|
|
59/pop-to-ECX
|
|
58/pop-to-EAX
|
|
# . epilog
|
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-write-slice:
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# setup
|
|
# . clear-stream(_test-stream)
|
|
# . . push args
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# . clear-stream(_test-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-buffered-file/imm32
|
|
05/add-to-EAX 4/imm32
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# var slice/ECX = "Abc"
|
|
68/push _test-slice-data-3/imm32/end
|
|
68/push _test-slice-data-0/imm32/start
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# write-slice(_test-buffered-file, slice)
|
|
# . . push args
|
|
51/push-ECX
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call write-slice/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# flush(_test-buffered-file)
|
|
# . . push args
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call flush/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# check-ints-equal(*_test-stream->data, "Abc", msg)
|
|
# . . push args
|
|
68/push "F - test-write-slice"/imm32
|
|
68/push 0x636241/imm32
|
|
# . . push *_test-stream->data
|
|
b8/copy-to-EAX _test-stream/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# . epilog
|
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
== data
|
|
|
|
_test-slice-data-0:
|
|
41/A
|
|
_test-slice-data-1:
|
|
62/b
|
|
_test-slice-data-2:
|
|
63/c
|
|
_test-slice-data-3:
|
|
64/d
|
|
_test-slice-data-4:
|
|
|
|
# . _. vim:nowrap:textwidth=0
|