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< title > Mu - linux/125write-stream-data.subx< / title >
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< a href = 'https://github.com/akkartik/mu/blob/main/linux/125write-stream-data.subx' > https://github.com/akkartik/mu/blob/main/linux/125write-stream-data.subx< / a >
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< pre id = 'vimCodeElement' >
< span id = "L1" class = "LineNr" > 1 < / span > == code
< span id = "L2" class = "LineNr" > 2 < / span > < span class = "subxComment" > # instruction effective address register displacement immediate< / span >
< span id = "L3" class = "LineNr" > 3 < / span > < span class = "subxS1Comment" > # . op subop mod rm32 base index scale r32< / span >
< span id = "L4" class = "LineNr" > 4 < / span > < span class = "subxS1Comment" > # . 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< / span >
< span id = "L5" class = "LineNr" > 5 < / span >
< span id = "L6" class = "LineNr" > 6 < / span > < span class = "subxComment" > # write an entire stream's contents to a buffered-file< / span >
< span id = "L7" class = "LineNr" > 7 < / span > < span class = "subxComment" > # ways to do this:< / span >
< span id = "L8" class = "LineNr" > 8 < / span > < span class = "subxComment" > # - construct a 'maximal slice' and pass it to write-slice-buffered< / span >
< span id = "L9" class = "LineNr" > 9 < / span > < span class = "subxComment" > # - flush the buffered-file and pass the stream directly to its fd (disabling buffering)< / span >
< span id = "L10" class = "LineNr" > 10 < / span > < span class = "subxComment" > # we'll go with the first way for now< / span >
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< span id = "L11" class = "LineNr" > 11 < / span > < span class = "subxFunction" > write-stream-data< / span > : < span class = "subxComment" > # f: (addr buffered-file), s: (addr stream byte)< / span >
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< span id = "L12" class = "LineNr" > 12 < / span > < span class = "subxS1Comment" > # . prologue< / span >
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< span id = "L13" class = "LineNr" > 13 < / span > 55/push-ebp
< span id = "L14" class = "LineNr" > 14 < / span > 89/copy 3/mod/direct 5/rm32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 4/r32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "subxComment" > # copy esp to ebp< / span >
< span id = "L15" class = "LineNr" > 15 < / span > < span class = "subxS1Comment" > # . save registers< / span >
< span id = "L16" class = "LineNr" > 16 < / span > 50/push-eax
< span id = "L17" class = "LineNr" > 17 < / span > 51/push-ecx
< span id = "L18" class = "LineNr" > 18 < / span > 56/push-esi
< span id = "L19" class = "LineNr" > 19 < / span > < span class = "subxComment" > # esi = s< / span >
< span id = "L20" class = "LineNr" > 20 < / span > 8b/copy 1/mod/*+disp8 5/rm32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 6/r32/esi 0xc/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # copy *(ebp+12) to esi< / span >
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< span id = "L21" class = "LineNr" > 21 < / span > < span class = "subxComment" > # var slice/ecx: slice = {s-> data, & s-> data[s-> write]}< / span >
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< span id = "L22" class = "LineNr" > 22 < / span > < span class = "subxS1Comment" > # . push & s-> data[s-> write]< / span >
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< span id = "L23" class = "LineNr" > 23 < / span > 8b/copy 0/mod/indirect 6/rm32/esi < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 0/r32/eax < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "subxComment" > # copy *esi to eax< / span >
< span id = "L24" class = "LineNr" > 24 < / span > 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 0/index/eax < span class = "Normal" > . < / span > 0/r32/eax 0xc/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # copy esi+eax+12 to eax< / span >
< span id = "L25" class = "LineNr" > 25 < / span > 50/push-eax
< span id = "L26" class = "LineNr" > 26 < / span > < span class = "subxS1Comment" > # . push s-> data< / span >
< span id = "L27" class = "LineNr" > 27 < / span > 8d/copy-address 1/mod/*+disp8 6/rm32/esi < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 0/r32/eax 0xc/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # copy esi+12 to eax< / span >
< span id = "L28" class = "LineNr" > 28 < / span > 50/push-eax
< span id = "L29" class = "LineNr" > 29 < / span > < span class = "subxS1Comment" > # . ecx = esp< / span >
< span id = "L30" class = "LineNr" > 30 < / span > 89/copy 3/mod/direct 1/rm32/ecx < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 4/r32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "subxComment" > # copy esp to ecx< / span >
< span id = "L31" class = "LineNr" > 31 < / span > < span class = "subxComment" > # write-slice-buffered(f, slice)< / span >
< span id = "L32" class = "LineNr" > 32 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L33" class = "LineNr" > 33 < / span > 51/push-ecx
< span id = "L34" class = "LineNr" > 34 < / span > ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 8/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # push *(ebp+8)< / span >
< span id = "L35" class = "LineNr" > 35 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L36" class = "LineNr" > 36 < / span > e8/call < a href = '123slice.subx.html#L908' > write-slice-buffered< / a > /disp32
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< span id = "L37" class = "LineNr" > 37 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L38" class = "LineNr" > 38 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 8/imm32 < span class = "subxComment" > # add to esp< / span >
< span id = "L39" class = "LineNr" > 39 < / span > < span class = "Constant" > $write-stream-data:end< / span > :
< span id = "L40" class = "LineNr" > 40 < / span > < span class = "subxS1Comment" > # . restore locals< / span >
< span id = "L41" class = "LineNr" > 41 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 8/imm32 < span class = "subxComment" > # add to esp< / span >
< span id = "L42" class = "LineNr" > 42 < / span > < span class = "subxS1Comment" > # . restore registers< / span >
< span id = "L43" class = "LineNr" > 43 < / span > 5e/pop-to-esi
< span id = "L44" class = "LineNr" > 44 < / span > 59/pop-to-ecx
< span id = "L45" class = "LineNr" > 45 < / span > 58/pop-to-eax
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< span id = "L46" class = "LineNr" > 46 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
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< span id = "L47" class = "LineNr" > 47 < / span > 89/copy 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 5/r32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "subxComment" > # copy ebp to esp< / span >
< span id = "L48" class = "LineNr" > 48 < / span > 5d/pop-to-ebp
< span id = "L49" class = "LineNr" > 49 < / span > c3/return
< span id = "L50" class = "LineNr" > 50 < / span >
< span id = "L51" class = "LineNr" > 51 < / span > < span class = "subxTest" > test-write-stream-data< / span > :
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< span id = "L52" class = "LineNr" > 52 < / span > < span class = "subxS1Comment" > # . prologue< / span >
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< span id = "L53" class = "LineNr" > 53 < / span > 55/push-ebp
< span id = "L54" class = "LineNr" > 54 < / span > 89/copy 3/mod/direct 5/rm32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 4/r32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "subxComment" > # copy esp to ebp< / span >
< span id = "L55" class = "LineNr" > 55 < / span > < span class = "subxComment" > # setup< / span >
< span id = "L56" class = "LineNr" > 56 < / span > < span class = "subxS1Comment" > # . clear-stream(_test-output-stream)< / span >
< span id = "L57" class = "LineNr" > 57 < / span > < span class = "subxS2Comment" > # . . push args< / span >
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< span id = "L58" class = "LineNr" > 58 < / span > 68/push < a href = '115write-byte.subx.html#L287' > _test-output-stream< / a > /imm32
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< span id = "L59" class = "LineNr" > 59 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L60" class = "LineNr" > 60 < / span > e8/call < a href = '106stream.subx.html#L17' > clear-stream< / a > /disp32
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< span id = "L61" class = "LineNr" > 61 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L62" class = "LineNr" > 62 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 4/imm32 < span class = "subxComment" > # add to esp< / span >
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< span id = "L63" class = "LineNr" > 63 < / span > < span class = "subxS1Comment" > # . clear-stream($_test-output-buffered-file-> buffer)< / span >
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< span id = "L64" class = "LineNr" > 64 < / span > < span class = "subxS2Comment" > # . . push args< / span >
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< span id = "L65" class = "LineNr" > 65 < / span > 68/push $_test-output-buffered-file-> buffer/imm32
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< span id = "L66" class = "LineNr" > 66 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L67" class = "LineNr" > 67 < / span > e8/call < a href = '106stream.subx.html#L17' > clear-stream< / a > /disp32
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< span id = "L68" class = "LineNr" > 68 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L69" class = "LineNr" > 69 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 4/imm32 < span class = "subxComment" > # add to esp< / span >
< span id = "L70" class = "LineNr" > 70 < / span > < span class = "subxS1Comment" > # . clear-stream(_test-input-stream)< / span >
< span id = "L71" class = "LineNr" > 71 < / span > < span class = "subxS2Comment" > # . . push args< / span >
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< span id = "L72" class = "LineNr" > 72 < / span > 68/push < a href = '112read-byte.subx.html#L331' > _test-input-stream< / a > /imm32
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< span id = "L73" class = "LineNr" > 73 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L74" class = "LineNr" > 74 < / span > e8/call < a href = '106stream.subx.html#L17' > clear-stream< / a > /disp32
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< span id = "L75" class = "LineNr" > 75 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L76" class = "LineNr" > 76 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 4/imm32 < span class = "subxComment" > # add to esp< / span >
< span id = "L77" class = "LineNr" > 77 < / span > < span class = "subxComment" > # initialize input< / span >
< span id = "L78" class = "LineNr" > 78 < / span > < span class = "subxS1Comment" > # . write(_test-input-stream, " abcd" )< / span >
< span id = "L79" class = "LineNr" > 79 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L80" class = "LineNr" > 80 < / span > 68/push < span class = "Constant" > " abcd" < / span > /imm32
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< span id = "L81" class = "LineNr" > 81 < / span > 68/push < a href = '112read-byte.subx.html#L331' > _test-input-stream< / a > /imm32
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< span id = "L82" class = "LineNr" > 82 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L83" class = "LineNr" > 83 < / span > e8/call < a href = '108write.subx.html#L24' > write< / a > /disp32
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< span id = "L84" class = "LineNr" > 84 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L85" class = "LineNr" > 85 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 8/imm32 < span class = "subxComment" > # add to esp< / span >
< span id = "L86" class = "LineNr" > 86 < / span > < span class = "subxComment" > # write-stream-data(_test-output-buffered-file, _test-input-stream)< / span >
< span id = "L87" class = "LineNr" > 87 < / span > < span class = "subxS2Comment" > # . . push args< / span >
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< span id = "L88" class = "LineNr" > 88 < / span > 68/push < a href = '112read-byte.subx.html#L331' > _test-input-stream< / a > /imm32
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< span id = "L89" class = "LineNr" > 89 < / span > 68/push < a href = '115write-byte.subx.html#L425' > _test-output-buffered-file< / a > /imm32
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< span id = "L90" class = "LineNr" > 90 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L91" class = "LineNr" > 91 < / span > e8/call < a href = '125write-stream-data.subx.html#L11' > write-stream-data< / a > /disp32
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< span id = "L92" class = "LineNr" > 92 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L93" class = "LineNr" > 93 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 8/imm32 < span class = "subxComment" > # add to esp< / span >
< span id = "L94" class = "LineNr" > 94 < / span > < span class = "subxComment" > # check that the write happened as expected< / span >
< span id = "L95" class = "LineNr" > 95 < / span > < span class = "subxS1Comment" > # . flush(_test-output-buffered-file)< / span >
< span id = "L96" class = "LineNr" > 96 < / span > < span class = "subxS2Comment" > # . . push args< / span >
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< span id = "L97" class = "LineNr" > 97 < / span > 68/push < a href = '115write-byte.subx.html#L425' > _test-output-buffered-file< / a > /imm32
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< span id = "L98" class = "LineNr" > 98 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L99" class = "LineNr" > 99 < / span > e8/call < a href = '115write-byte.subx.html#L81' > flush< / a > /disp32
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< span id = "L100" class = "LineNr" > 100 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L101" class = "LineNr" > 101 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 4/imm32 < span class = "subxComment" > # add to esp< / span >
< span id = "L102" class = "LineNr" > 102 < / span > < span class = "subxS1Comment" > # . check-stream-equal(_test-output-stream, " abcd" , msg)< / span >
< span id = "L103" class = "LineNr" > 103 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L104" class = "LineNr" > 104 < / span > 68/push < span class = "Constant" > " F - test-write-stream-data" < / span > /imm32
< span id = "L105" class = "LineNr" > 105 < / span > 68/push < span class = "Constant" > " abcd" < / span > /imm32
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< span id = "L106" class = "LineNr" > 106 < / span > 68/push < a href = '115write-byte.subx.html#L287' > _test-output-stream< / a > /imm32
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< span id = "L107" class = "LineNr" > 107 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L108" class = "LineNr" > 108 < / span > e8/call < a href = '109stream-equal.subx.html#L194' > check-stream-equal< / a > /disp32
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< span id = "L109" class = "LineNr" > 109 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L110" class = "LineNr" > 110 < / span > 81 0/subop/add 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 0xc/imm32 < span class = "subxComment" > # add to esp< / span >
< span id = "L111" class = "LineNr" > 111 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L112" class = "LineNr" > 112 < / span > 89/copy 3/mod/direct 4/rm32/esp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 5/r32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "subxComment" > # copy ebp to esp< / span >
< span id = "L113" class = "LineNr" > 113 < / span > 5d/pop-to-ebp
< span id = "L114" class = "LineNr" > 114 < / span > c3/return
2019-09-20 18:19:30 +00:00
< / pre >
< / body >
< / html >
<!-- vim: set foldmethod=manual : -->