1536 lines
77 KiB
Plaintext
1536 lines
77 KiB
Plaintext
# Read a text file containing whitespace-separated pairs of ascii hex bytes
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# from stdin, and convert them into binary bytes (octets) on stdout. Ignore
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# comments between '#' and newline.
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#
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# To run (from the subx/ directory):
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# $ ./subx translate *.subx apps/hex.subx -o apps/hex
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# $ echo '80 81 82 # comment' |./subx run apps/hex |xxd -
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# Expected output:
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# 00000000: 8081 82
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#
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# Only hex bytes and comments are permitted. Outside of comments all words
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# must be exactly 2 characters long and contain only characters [0-9a-f]. No
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# uppercase hex.
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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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# for debugging: run a single test
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#? e8/call test-skip-until-newline/disp32
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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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#? eb/jump $main:end/disp8
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# main: run tests if necessary, convert stdin if not
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# . prolog
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# - if argc > 1 and argv[1] == "test", then return run_tests()
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# . argc > 1
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81 7/subop/compare 1/mod/*+disp8 5/rm32/EBP . . . . 0/disp8 1/imm32 # compare *EBP
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7e/jump-if-lesser-or-equal $run-main/disp8
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# . argv[1] == "test"
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# . . push args
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68/push "test"/imm32
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
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# . . call
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e8/call kernel-string-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 result
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3d/compare-EAX 1/imm32
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75/jump-if-not-equal $run-main/disp8
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# . run-tests()
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e8/call run-tests/disp32
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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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eb/jump $main:end/disp8
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$run-main:
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# - otherwise convert stdin
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# var ed/EAX : exit-descriptor
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81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
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89/copy 3/mod/direct 0/rm32/EAX . . . 4/r32/ESP . . # copy ESP to EAX
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# configure ed to really exit()
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# . ed->target = 0
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c7 0/subop/copy 0/mod/direct 0/rm32/EAX . . . . . 0/imm32 # copy to *EAX
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# return convert(Stdin, 1/stdout, 2/stderr, ed)
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# . . push args
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50/push-EAX/ed
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68/push Stderr/imm32
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68/push Stdout/imm32
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68/push Stdin/imm32
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# . . call
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e8/call convert/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP
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# . syscall(exit, 0)
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bb/copy-to-EBX 0/imm32
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$main:end:
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b8/copy-to-EAX 1/imm32/exit
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cd/syscall 0x80/imm8
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# the main entry point
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convert: # in : (address buffered-file), out : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -> <void>
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# pseudocode:
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# repeatedly
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# EAX = convert-next-octet(in, err, ed)
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# if (EAX == 0xffffffff) break # eof
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# write-byte(out, AL)
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# flush(out)
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#
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# . save registers
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50/push-EAX
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$convert:loop:
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# EAX = convert-next-octet(in, err, ed)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0x14/disp8 . # push *(EBP+20)
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0x10/disp8 . # push *(EBP+16)
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
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# . . call
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e8/call convert-next-octet/disp32
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# . . discard first 2 args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# if (EAX == 0xffffffff) break
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81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xffffffff/imm32 # compare EAX
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74/jump-if-equal $convert:loop-end/disp8
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# write-byte(out, AL)
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# . . push args
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50/push-EAX
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
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# . . call
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e8/call write-byte/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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# loop
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eb/jump $convert:loop/disp8
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$convert:loop-end:
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# flush(out)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
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# . . call
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e8/call flush/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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$convert:end:
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# . restore registers
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58/pop-to-EAX
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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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# read bytes from 'in' until a sequence of two lowercase hex (0-9, a-f) bytes
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# skip spaces and newlines
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# on '#' skip bytes until newline
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# raise an error and abort on all other unexpected bytes
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# return in EAX an _octet_ containing the binary value of the two hex characters
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# return 0xffffffff on end of file
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convert-next-octet: # in : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -> byte-or-eof/EAX
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# pseudocode:
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# EAX = scan-next-byte(in, err, ed)
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# if (EAX == 0xffffffff) return
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# ECX = from-hex-char(EAX)
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# EAX = scan-next-byte(in, err, ed)
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# if (EAX == 0xffffffff) error("partial byte found.")
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# EAX = from-hex-char(EAX)
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# EAX = (ECX << 4) | EAX
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# return
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#
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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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# EAX = scan-next-byte(in, err, ed)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0x10/disp8 . # push *(EBP+16)
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
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# . . call
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e8/call scan-next-byte/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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# if (EAX == 0xffffffff) return
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81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xffffffff/imm32 # compare EAX
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74/jump-if-equal $convert-next-octet:end/disp8
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# EAX = from-hex-char(EAX)
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e8/call from-hex-char/disp32
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# ECX = EAX
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89/copy 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # copy EAX to ECX
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# EAX = scan-next-byte(in, err, ed)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0x10/disp8 . # push *(EBP+16)
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
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# . . call
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e8/call scan-next-byte/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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# if (EAX == 0xffffffff) error(ed, err, "partial byte found.")
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81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xffffffff/imm32 # compare EAX
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75/jump-if-not-equal $convert-next-octet:convert/disp8
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# . error-byte(ed, err, msg, '.') # reusing error-byte to avoid creating _yet_ another helper
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# . . push args
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68/push 0x2e/imm32/period/dummy
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68/push "convert-next-octet: partial byte found"/imm32
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0x10/disp8 . # push *(EBP+16)
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# . . call
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e8/call error-byte/disp32 # never returns
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$convert-next-octet:convert:
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# EAX = from-hex-char(EAX)
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e8/call from-hex-char/disp32
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# EAX = (ECX << 4) | EAX
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# . ECX <<= 4
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c1/shift 4/subop/left 3/mod/direct 1/rm32/ECX . . . . . 4/imm8 # shift ECX left by 4 bits
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# . EAX |= ECX
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09/or 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # EAX = bitwise OR with ECX
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$convert-next-octet: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-convert-next-octet:
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# - check that the first two bytes of the input are assembled into the resulting octet
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# This test uses exit-descriptors. Use EBP for setting up local variables.
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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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# clear all streams
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# . clear-stream(_test-stream)
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# . . push args
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68/push _test-stream/imm32
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# . . call
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e8/call clear-stream/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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# . clear-stream(_test-buffered-file+4)
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# . . push args
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b8/copy-to-EAX _test-buffered-file/imm32
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05/add-to-EAX 4/imm32
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50/push-EAX
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# . . call
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e8/call clear-stream/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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# . clear-stream(_test-error-stream)
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# . . push args
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68/push _test-error-stream/imm32
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# . . call
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e8/call clear-stream/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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# . clear-stream(_test-error-buffered-file+4)
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# . . push args
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b8/copy-to-EAX _test-error-buffered-file/imm32
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05/add-to-EAX 4/imm32
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50/push-EAX
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# . . call
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e8/call clear-stream/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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# initialize '_test-stream' to "abc"
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# . write(_test-stream, "abc")
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# . . push args
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68/push "abc"/imm32
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68/push _test-stream/imm32
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# . . call
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e8/call write/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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# initialize exit-descriptor 'ed' for the call to 'convert-next-octet' below
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# . var ed/ECX : exit-descriptor
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81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# . tailor-exit-descriptor(ed, 12)
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# . . push args
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68/push 0xc/imm32/nbytes-of-args-for-convert-next-octet
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51/push-ECX/ed
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# . . call
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e8/call tailor-exit-descriptor/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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# EAX = convert-next-octet(_test-buffered-file, _test-error-buffered-file, ed)
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# . . push args
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51/push-ECX/ed
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68/push _test-error-buffered-file/imm32
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68/push _test-buffered-file/imm32
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# . . call
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e8/call convert-next-octet/disp32
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# registers except ESP may be clobbered at this point
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# pop args to convert-next-octet
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# . . discard first 2 args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . . restore ed
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59/pop-to-ECX
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# check that convert-next-octet didn't abort
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# . check-ints-equal(ed->value, 0, msg)
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# . . push args
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68/push "F - test-convert-next-octet: unexpected abort"/imm32
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68/push 0/imm32
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# . . push ed->value
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ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
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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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# return if abort
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81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
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75/jump-if-not-equal $test-convert-next-octet:end/disp8
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# check-ints-equal(EAX, 0xab, msg)
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# . . push args
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68/push "F - test-convert-next-octet"/imm32
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68/push 0xab/imm32/ab
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50/push-EAX
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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$test-convert-next-octet:end:
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# . epilog
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# don't restore ESP from EBP; manually reclaim locals
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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5d/pop-to-EBP
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c3/return
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test-convert-next-octet-handles-eof:
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# - check that eof returns the sentinel octet
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# This test uses exit-descriptors. Use EBP for setting up local variables.
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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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# clear all streams
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# . clear-stream(_test-stream)
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# . . push args
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68/push _test-stream/imm32
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# . . call
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e8/call clear-stream/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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# . clear-stream(_test-buffered-file+4)
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# . . push args
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b8/copy-to-EAX _test-buffered-file/imm32
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05/add-to-EAX 4/imm32
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50/push-EAX
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# . . call
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e8/call clear-stream/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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# . clear-stream(_test-error-stream)
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# . . push args
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68/push _test-error-stream/imm32
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# . . call
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e8/call clear-stream/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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# . clear-stream(_test-error-buffered-file+4)
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# . . push args
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b8/copy-to-EAX _test-error-buffered-file/imm32
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05/add-to-EAX 4/imm32
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50/push-EAX
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# . . call
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e8/call clear-stream/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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# don't initialize '_test-stream'
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# initialize exit-descriptor 'ed' for the call to 'convert-next-octet' below
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# . var ed/ECX : exit-descriptor
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81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# . tailor-exit-descriptor(ed, 12)
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# . . push args
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68/push 0xc/imm32/nbytes-of-args-for-convert-next-octet
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51/push-ECX/ed
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# . . call
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e8/call tailor-exit-descriptor/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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# EAX = convert-next-octet(_test-buffered-file, _test-error-buffered-file, ed)
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# . . push args
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51/push-ECX/ed
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68/push _test-error-buffered-file/imm32
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68/push _test-buffered-file/imm32
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# . . call
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e8/call convert-next-octet/disp32
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# registers except ESP may be clobbered at this point
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# pop args to convert-next-octet
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# . . discard first 2 args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . . restore ed
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59/pop-to-ECX
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# check that convert-next-octet didn't abort
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# . check-ints-equal(ed->value, 0, msg)
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# . . push args
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68/push "F - test-convert-next-octet: unexpected abort"/imm32
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68/push 0/imm32
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# . . push ed->value
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ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
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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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# return if abort
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|
81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
|
|
75/jump-if-not-equal $test-convert-next-octet-handles-eof:end/disp8
|
|
# check-ints-equal(EAX, 0xffffffff, msg)
|
|
# . . push args
|
|
68/push "F - test-convert-next-octet-handles-eof"/imm32
|
|
68/push 0xffffffff/imm32/eof
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-convert-next-octet-handles-eof:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-convert-next-octet-aborts-on-single-hex-byte:
|
|
# - check that a single unaccompanied hex byte aborts
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# initialize '_test-stream' to "a"
|
|
# . write(_test-stream, "a")
|
|
# . . push args
|
|
68/push "a"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# initialize exit-descriptor 'ed' for the call to 'convert-next-octet' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-convert-next-octet
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = convert-next-octet(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call convert-next-octet/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to convert-next-octet
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that convert-next-octet aborted
|
|
# . check-ints-equal(ed->value, 2, msg)
|
|
# . . push args
|
|
68/push "F - test-convert-next-octet-aborts-on-single-hex-byte: unexpected abort"/imm32
|
|
68/push 2/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-convert-next-octet-aborts-on-single-hex-byte:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
# read whitespace until a hex byte, and return it
|
|
# return 0xffffffff if file ends without finding a hex byte
|
|
# on '#' skip all bytes until newline
|
|
# abort on any other byte
|
|
scan-next-byte: # in : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -> byte-or-eof/EAX
|
|
# pseudocode:
|
|
# repeatedly
|
|
# EAX = read-byte(in)
|
|
# if (EAX == 0xffffffff) return EAX
|
|
# if (is-hex-digit?(EAX)) return EAX
|
|
# if (EAX == ' ' or '\t' or '\n') continue
|
|
# if (EAX == '#') skip-until-newline(in)
|
|
# else error-byte(ed, err, "invalid byte: " EAX)
|
|
#
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# . save registers
|
|
$scan-next-byte:loop:
|
|
# EAX = read-byte(in)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
|
|
# . . call
|
|
e8/call read-byte/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# if (EAX == 0xffffffff) return EAX
|
|
3d/compare-with-EAX 0xffffffff/imm32
|
|
74/jump-if-equal $scan-next-byte:end/disp8
|
|
# if (is-hex-digit?(EAX)) return EAX
|
|
# . save EAX for now
|
|
50/push-EAX
|
|
# . is-hex-digit?(EAX)
|
|
# . . push args
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call is-hex-digit?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# . compare with 'false'
|
|
3d/compare-with-EAX 0/imm32
|
|
# . restore EAX (does not affect flags)
|
|
58/pop-to-EAX
|
|
# . check whether to return
|
|
75/jump-if-not-equal $scan-next-byte:end/disp8
|
|
$scan-next-byte:check1:
|
|
# if (EAX == ' ') continue
|
|
81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0x20/imm32 # compare EAX
|
|
74/jump-if-equal $scan-next-byte:loop/disp8
|
|
# if (EAX == '\t') continue
|
|
81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0x9/imm32 # compare EAX
|
|
74/jump-if-equal $scan-next-byte:loop/disp8
|
|
# if (EAX == '\n') continue
|
|
81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xa/imm32 # compare EAX
|
|
74/jump-if-equal $scan-next-byte:loop/disp8
|
|
$scan-next-byte:check2:
|
|
# if (EAX == '#') skip-until-newline(in)
|
|
3d/compare-with-EAX 0x23/imm32
|
|
75/jump-if-not-equal $scan-next-byte:check3/disp8
|
|
# . skip-until-newline(in)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
|
|
# . . call
|
|
e8/call skip-until-newline/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
eb/jump $scan-next-byte:loop/disp8
|
|
$scan-next-byte:check3:
|
|
# otherwise error-byte(ed, err, msg, EAX)
|
|
# . . push args
|
|
50/push-EAX
|
|
68/push "scan-next-byte: invalid byte"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0x10/disp8 . # push *(EBP+16)
|
|
# . . call
|
|
e8/call error-byte/disp32 # never returns
|
|
$scan-next-byte:end:
|
|
# . restore registers
|
|
# . epilog
|
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-scan-next-byte:
|
|
# - check that the first byte of the input is returned
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# initialize '_test-stream' to "abc"
|
|
# . write(_test-stream, "abc")
|
|
# . . push args
|
|
68/push "abc"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# initialize exit-descriptor 'ed' for the call to 'scan-next-byte' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-scan-next-byte
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = scan-next-byte(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call scan-next-byte/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to scan-next-byte
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that scan-next-byte didn't abort
|
|
# . check-ints-equal(ed->value, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte: unexpected abort"/imm32
|
|
68/push 0/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# return if abort
|
|
81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
|
|
75/jump-if-not-equal $test-scan-next-byte:end/disp8
|
|
# check-ints-equal(EAX, 0x61/a, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte"/imm32
|
|
68/push 0x61/imm32/a
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-scan-next-byte:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-scan-next-byte-skips-whitespace:
|
|
# - check that the first byte after whitespace is returned
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# initialize '_test-stream' to input with leading whitespace
|
|
# . write(_test-stream, text)
|
|
# . . push args
|
|
68/push " abc"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# initialize exit-descriptor 'ed' for the call to 'scan-next-byte' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-scan-next-byte
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = scan-next-byte(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call scan-next-byte/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to scan-next-byte
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that scan-next-byte didn't abort
|
|
# . check-ints-equal(ed->value, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-skips-whitespace: unexpected abort"/imm32
|
|
68/push 0/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# return if abort
|
|
81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
|
|
75/jump-if-not-equal $test-scan-next-byte-skips-whitespace:end/disp8
|
|
# check-ints-equal(EAX, 0x61/a, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-skips-whitespace"/imm32
|
|
68/push 0x61/imm32/a
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-scan-next-byte-skips-whitespace:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-scan-next-byte-skips-comment:
|
|
# - check that the first byte after a comment (and newline) is returned
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# initialize '_test-stream' to input with leading comment
|
|
# . write(_test-stream, comment)
|
|
# . . push args
|
|
68/push "#x"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . write(_test-stream, Newline)
|
|
# . . push args
|
|
68/push Newline/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . write(_test-stream, real text)
|
|
# . . push args
|
|
68/push "ab"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# initialize exit-descriptor 'ed' for the call to 'scan-next-byte' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-scan-next-byte
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = scan-next-byte(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call scan-next-byte/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to scan-next-byte
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that scan-next-byte didn't abort
|
|
# . check-ints-equal(ed->value, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-skips-comment: unexpected abort"/imm32
|
|
68/push 0/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# return if abort
|
|
81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
|
|
75/jump-if-not-equal $test-scan-next-byte-skips-comment:end/disp8
|
|
# check-ints-equal(EAX, 0x61/a, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-skips-comment"/imm32
|
|
68/push 0x61/imm32/a
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-scan-next-byte-skips-comment:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-scan-next-byte-skips-comment-and-whitespace:
|
|
# - check that the first byte after a comment and any further whitespace is returned
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# initialize '_test-stream' to input with leading comment and more whitespace after newline
|
|
# . write(_test-stream, comment)
|
|
# . . push args
|
|
68/push "#x"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . write(_test-stream, Newline)
|
|
# . . push args
|
|
68/push Newline/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . write(_test-stream, real text)
|
|
# . . push args
|
|
68/push " ab"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# initialize exit-descriptor 'ed' for the call to 'scan-next-byte' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-scan-next-byte
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = scan-next-byte(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call scan-next-byte/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to scan-next-byte
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that scan-next-byte didn't abort
|
|
# . check-ints-equal(ed->value, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-skips-comment-and-whitespace: unexpected abort"/imm32
|
|
68/push 0/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# return if abort
|
|
81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
|
|
75/jump-if-not-equal $test-scan-next-byte-skips-comment-and-whitespace:end/disp8
|
|
# check-ints-equal(EAX, 0x61/a, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-skips-comment-and-whitespace"/imm32
|
|
68/push 0x61/imm32/a
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-scan-next-byte-skips-comment-and-whitespace:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-scan-next-byte-skips-whitespace-and-comment:
|
|
# - check that the first byte after any whitespace and comments is returned
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# initialize '_test-stream' to input with leading whitespace and comment
|
|
# . write(_test-stream, comment)
|
|
# . . push args
|
|
68/push " #x"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . write(_test-stream, Newline)
|
|
# . . push args
|
|
68/push Newline/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . write(_test-stream, real text)
|
|
# . . push args
|
|
68/push "ab"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# initialize exit-descriptor 'ed' for the call to 'scan-next-byte' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-scan-next-byte
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = scan-next-byte(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call scan-next-byte/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to scan-next-byte
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that scan-next-byte didn't abort
|
|
# . check-ints-equal(ed->value, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-skips-whitespace-and-comment: unexpected abort"/imm32
|
|
68/push 0/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# return if abort
|
|
81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
|
|
75/jump-if-not-equal $test-scan-next-byte-skips-whitespace-and-comment:end/disp8
|
|
# check-ints-equal(EAX, 0x61/a, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-skips-whitespace-and-comment"/imm32
|
|
68/push 0x61/imm32/a
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-scan-next-byte-skips-whitespace-and-comment:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-scan-next-byte-reads-final-byte:
|
|
# - check that the final byte in input is returned
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# initialize '_test-stream' to input with single character
|
|
# . write(_test-stream, character)
|
|
# . . push args
|
|
68/push "a"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# initialize exit-descriptor 'ed' for the call to 'scan-next-byte' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-scan-next-byte
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = scan-next-byte(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call scan-next-byte/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to scan-next-byte
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that scan-next-byte didn't abort
|
|
# . check-ints-equal(ed->value, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-reads-final-byte: unexpected abort"/imm32
|
|
68/push 0/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# return if abort
|
|
81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
|
|
75/jump-if-not-equal $test-scan-next-byte-reads-final-byte:end/disp8
|
|
# check-ints-equal(EAX, 0x61/a, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-reads-final-byte"/imm32
|
|
68/push 0x61/imm32/a
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-scan-next-byte-reads-final-byte:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-scan-next-byte-handles-eof:
|
|
# - check that the right sentinel value is returned when there's no data remaining to be read
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# leave '_test-stream' empty
|
|
# initialize exit-descriptor 'ed' for the call to 'scan-next-byte' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-scan-next-byte
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = scan-next-byte(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call scan-next-byte/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to scan-next-byte
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that scan-next-byte didn't abort
|
|
# . check-ints-equal(ed->value, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-handles-eof: unexpected abort"/imm32
|
|
68/push 0/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# return if abort
|
|
81 7/subop/compare 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 0/imm32 # compare *(ECX+4)
|
|
75/jump-if-not-equal $test-scan-next-byte-handles-eof:end/disp8
|
|
# check-ints-equal(EAX, 0xffffffff/eof, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-handles-eof"/imm32
|
|
68/push 0xffffffff/imm32/eof
|
|
50/push-EAX
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-scan-next-byte-handles-eof:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
test-scan-next-byte-aborts-on-invalid-byte:
|
|
# - check that the a bad byte immediately aborts
|
|
# This test uses exit-descriptors. Use EBP for setting up local variables.
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# clear all streams
|
|
# . 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
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-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-error-buffered-file+4)
|
|
# . . push args
|
|
b8/copy-to-EAX _test-error-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
|
|
# initialize '_test-stream' to "x"
|
|
# . write(_test-stream, "x")
|
|
# . . push args
|
|
68/push "x"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# initialize exit-descriptor 'ed' for the call to 'scan-next-byte' below
|
|
# . var ed/ECX : exit-descriptor
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# . tailor-exit-descriptor(ed, 12)
|
|
# . . push args
|
|
68/push 0xc/imm32/nbytes-of-args-for-scan-next-byte
|
|
51/push-ECX/ed
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# EAX = scan-next-byte(_test-buffered-file, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
51/push-ECX/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call scan-next-byte/disp32
|
|
# registers except ESP may be clobbered at this point
|
|
# pop args to scan-next-byte
|
|
# . . discard first 2 args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . . restore ed
|
|
59/pop-to-ECX
|
|
# check that scan-next-byte aborted
|
|
# . check-ints-equal(ed->value, 2, msg)
|
|
# . . push args
|
|
68/push "F - test-scan-next-byte-aborts-on-invalid-byte"/imm32
|
|
68/push 2/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX . . . . 4/disp8 . # push *(ECX+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
$test-scan-next-byte-aborts-on-invalid-byte:end:
|
|
# . epilog
|
|
# don't restore ESP from EBP; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
skip-until-newline: # in : (address buffered-file) -> <void>
|
|
# pseudocode:
|
|
# push EAX
|
|
# repeatedly:
|
|
# EAX = read-byte(in)
|
|
# if (EAX == 0xffffffff) break
|
|
# if (EAX == 0x0a) break
|
|
# pop EAX
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# . save registers
|
|
50/push-EAX
|
|
$skip-until-newline:loop:
|
|
# . EAX = read-byte(in)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
|
|
# . . call
|
|
e8/call read-byte/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# . if (EAX == 0xffffffff) break
|
|
81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xffffffff/imm32 # compare EAX
|
|
74/jump-if-equal $skip-until-newline:end/disp8
|
|
# . if (EAX != 0xa/newline) loop
|
|
81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xa/imm32 # compare EAX
|
|
75/jump-if-not-equal $skip-until-newline:loop/disp8
|
|
$skip-until-newline:end:
|
|
# . restore registers
|
|
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-skip-until-newline:
|
|
# - check that the read pointer points after the newline
|
|
# 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
|
|
# initialize '_test-stream' to "abc\nde"
|
|
# . write(_test-stream, "abc")
|
|
# . . push args
|
|
68/push "abc"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . write(_test-stream, Newline)
|
|
# . . push args
|
|
68/push Newline/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . write(_test-stream, "de")
|
|
# . . push args
|
|
68/push "de"/imm32
|
|
68/push _test-stream/imm32
|
|
# . . call
|
|
e8/call write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# skip-until-newline(_test-buffered-file)
|
|
# . . push args
|
|
68/push _test-buffered-file/imm32
|
|
# . . call
|
|
e8/call skip-until-newline/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# check-ints-equal(_test-buffered-file->read, 4, msg)
|
|
# . . push args
|
|
68/push "F - test-skip-until-newline"/imm32
|
|
68/push 4/imm32
|
|
b8/copy-to-EAX _test-buffered-file/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 8/disp8 . # push *(EAX+8)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# . end
|
|
c3/return
|
|
|
|
== data
|
|
|
|
_test-error-stream:
|
|
# current write index
|
|
00 00 00 00
|
|
# current read index
|
|
00 00 00 00
|
|
# length (= 8)
|
|
08 00 00 00
|
|
# data
|
|
00 00 00 00 00 00 00 00 # 8 bytes
|
|
|
|
# a test buffered file for _test-stream
|
|
_test-error-buffered-file:
|
|
# file descriptor or (address stream)
|
|
_test-error-stream/imm32
|
|
# current write index
|
|
00 00 00 00
|
|
# current read index
|
|
00 00 00 00
|
|
# length (6)
|
|
06 00 00 00
|
|
# data
|
|
00 00 00 00 00 00 # 6 bytes
|
|
|
|
# . . vim:nowrap:textwidth=0
|