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< title > Mu - 315stack-debug.subx< / title >
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< a href = 'https://github.com/akkartik/mu/blob/main/315stack-debug.subx' > https://github.com/akkartik/mu/blob/main/315stack-debug.subx< / a >
< pre id = 'vimCodeElement' >
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< span id = "L1" class = "LineNr" > 1 < / span > < span class = "subxComment" > # The stack shouldn't grow into the code area.< / span >
< span id = "L2" class = "LineNr" > 2 < / span >
< span id = "L3" class = "LineNr" > 3 < / span > == code
< span id = "L4" class = "LineNr" > 4 < / span >
< span id = "L5" class = "LineNr" > 5 < / span > < span class = "subxFunction" > check-stack< / span > :
< span id = "L6" class = "LineNr" > 6 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L7" class = "LineNr" > 7 < / span > 55/push-ebp
< span id = "L8" class = "LineNr" > 8 < / span > 89/< - %ebp 4/r32/esp
< span id = "L9" class = "LineNr" > 9 < / span > < span class = "subxS1Comment" > # . save registers< / span >
< span id = "L10" class = "LineNr" > 10 < / span > 50/push-eax
< span id = "L11" class = "LineNr" > 11 < / span > < span class = "subxComment" > #< / span >
< span id = "L12" class = "LineNr" > 12 < / span > 89/< - %eax 4/r32/esp
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< span id = "L13" class = "LineNr" > 13 < / span > 3d/compare-eax-and 0x01000000/imm32
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< span id = "L14" class = "LineNr" > 14 < / span > {
< span id = "L15" class = "LineNr" > 15 < / span > 7f/jump-if-> < span class = "Constant" > break< / span > /disp8
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< span id = "L16" class = "LineNr" > 16 < / span > (< a href = '317abort.subx.html#L5' > abort< / a > < span class = "Constant" > " stack overflow" < / span > )
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< span id = "L17" class = "LineNr" > 17 < / span > }
< span id = "L18" class = "LineNr" > 18 < / span > < span class = "Constant" > $check-stack:end< / span > :
< span id = "L19" class = "LineNr" > 19 < / span > < span class = "subxS1Comment" > # . restore registers< / span >
< span id = "L20" class = "LineNr" > 20 < / span > 58/pop-to-eax
< span id = "L21" class = "LineNr" > 21 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L22" class = "LineNr" > 22 < / span > 89/< - %esp 5/r32/ebp
< span id = "L23" class = "LineNr" > 23 < / span > 5d/pop-to-ebp
< span id = "L24" class = "LineNr" > 24 < / span > c3/return
< span id = "L25" class = "LineNr" > 25 < / span >
< span id = "L26" class = "LineNr" > 26 < / span > < span class = "subxFunction" > show-stack-state< / span > :
< span id = "L27" class = "LineNr" > 27 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L28" class = "LineNr" > 28 < / span > 55/push-ebp
< span id = "L29" class = "LineNr" > 29 < / span > 89/< - %ebp 4/r32/esp
< span id = "L30" class = "LineNr" > 30 < / span > < span class = "subxS1Comment" > # . save registers< / span >
< span id = "L31" class = "LineNr" > 31 < / span > 50/push-eax
< span id = "L32" class = "LineNr" > 32 < / span > 51/push-ecx
< span id = "L33" class = "LineNr" > 33 < / span > 52/push-edx
< span id = "L34" class = "LineNr" > 34 < / span > < span class = "subxComment" > #< / span >
< span id = "L35" class = "LineNr" > 35 < / span > 89/< - %edx 4/r32/esp
< span id = "L36" class = "LineNr" > 36 < / span > < span class = "subxComment" > # save old cursor position< / span >
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< span id = "L37" class = "LineNr" > 37 < / span > (< a href = '500fake-screen.mu.html#L174' > cursor-position< / a > 0) < span class = "subxComment" > # => eax, ecx< / span >
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< span id = "L38" class = "LineNr" > 38 < / span > < span class = "subxComment" > # print at top-right< / span >
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< span id = "L39" class = "LineNr" > 39 < / span > (< a href = '500fake-screen.mu.html#L190' > set-cursor-position< / a > 0 0x70 0)
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< span id = "L40" class = "LineNr" > 40 < / span > (< a href = '501draw-text.mu.html#L333' > draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen< / a > 0 %edx 0xf 0xc)
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< span id = "L41" class = "LineNr" > 41 < / span > < span class = "subxComment" > # restore cursor position< / span >
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< span id = "L42" class = "LineNr" > 42 < / span > (< a href = '500fake-screen.mu.html#L190' > set-cursor-position< / a > %eax %ecx)
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< span id = "L43" class = "LineNr" > 43 < / span > < span class = "Constant" > $show-stack-state:end< / span > :
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< span id = "L44" class = "LineNr" > 44 < / span > < span class = "subxS1Comment" > # . restore registers< / span >
< span id = "L45" class = "LineNr" > 45 < / span > 5a/pop-to-edx
< span id = "L46" class = "LineNr" > 46 < / span > 59/pop-to-ecx
< span id = "L47" class = "LineNr" > 47 < / span > 58/pop-to-eax
< span id = "L48" class = "LineNr" > 48 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L49" class = "LineNr" > 49 < / span > 89/< - %esp 5/r32/ebp
< span id = "L50" class = "LineNr" > 50 < / span > 5d/pop-to-ebp
< span id = "L51" class = "LineNr" > 51 < / span > c3/return
< span id = "L52" class = "LineNr" > 52 < / span >
< span id = "L53" class = "LineNr" > 53 < / span > < span class = "subxComment" > # Helper for debugging deeply recursive calls without logs or traces.< / span >
< span id = "L54" class = "LineNr" > 54 < / span > < span class = "subxComment" > # Turn it on, insert calls in the right places, and you get a terse sense of< / span >
< span id = "L55" class = "LineNr" > 55 < / span > < span class = "subxComment" > # important parts of the call stack. A poor sophont's stack trace.< / span >
< span id = "L56" class = "LineNr" > 56 < / span > < span class = "subxFunction" > debug-print< / span > : < span class = "subxComment" > # x: (addr array byte), fg: int, bg: int # x is very short; usually a single character< / span >
< span id = "L57" class = "LineNr" > 57 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L58" class = "LineNr" > 58 < / span > 55/push-ebp
< span id = "L59" class = "LineNr" > 59 < / span > 89/< - %ebp 4/r32/esp
< span id = "L60" class = "LineNr" > 60 < / span > < span class = "subxS1Comment" > # . save registers< / span >
< span id = "L61" class = "LineNr" > 61 < / span > 50/push-eax
< span id = "L62" class = "LineNr" > 62 < / span > 51/push-ecx
< span id = "L63" class = "LineNr" > 63 < / span > < span class = "subxComment" > #< / span >
< span id = "L64" class = "LineNr" > 64 < / span > {
< span id = "L65" class = "LineNr" > 65 < / span > 81 7/subop/compare *< span class = "SpecialChar" > < a href = '315stack-debug.subx.html#L121' > Really-debug-print< / a > < / span > 0/imm32/false
< span id = "L66" class = "LineNr" > 66 < / span > 74/jump-if-= < span class = "Constant" > break< / span > /disp8
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< span id = "L67" class = "LineNr" > 67 < / span > (< a href = '501draw-text.mu.html#L279' > draw-text-wrapping-right-then-down-from-cursor-over-full-screen< / a > 0 *(ebp+8) *(ebp+0xc) *(ebp+0x10))
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< span id = "L68" class = "LineNr" > 68 < / span > < span class = "subxComment" > # clear the screen and continue if we got too close to the bottom< / span >
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< span id = "L69" class = "LineNr" > 69 < / span > (< a href = '500fake-screen.mu.html#L174' > cursor-position< / a > 0) < span class = "subxComment" > # => eax, ecx< / span >
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< span id = "L70" class = "LineNr" > 70 < / span > 81 7/subop/compare %ecx 0x28/imm32
< span id = "L71" class = "LineNr" > 71 < / span > 75/jump-if-!= < span class = "Constant" > break< / span > /disp8
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< span id = "L72" class = "LineNr" > 72 < / span > (< a href = '500fake-screen.mu.html#L251' > clear-screen< / a > 0)
< span id = "L73" class = "LineNr" > 73 < / span > (< a href = '500fake-screen.mu.html#L190' > set-cursor-position< / a > 0 0 0)
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< span id = "L74" class = "LineNr" > 74 < / span > }
< span id = "L75" class = "LineNr" > 75 < / span > < span class = "Constant" > $debug-print:end< / span > :
< span id = "L76" class = "LineNr" > 76 < / span > < span class = "subxS1Comment" > # . restore registers< / span >
< span id = "L77" class = "LineNr" > 77 < / span > 59/pop-to-ecx
< span id = "L78" class = "LineNr" > 78 < / span > 58/pop-to-eax
< span id = "L79" class = "LineNr" > 79 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L80" class = "LineNr" > 80 < / span > 89/< - %esp 5/r32/ebp
< span id = "L81" class = "LineNr" > 81 < / span > 5d/pop-to-ebp
< span id = "L82" class = "LineNr" > 82 < / span > c3/return
< span id = "L83" class = "LineNr" > 83 < / span >
< span id = "L84" class = "LineNr" > 84 < / span > < span class = "subxFunction" > debug-print?< / span > : < span class = "subxComment" > # -> _/eax: boolean< / span >
< span id = "L85" class = "LineNr" > 85 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L86" class = "LineNr" > 86 < / span > 55/push-ebp
< span id = "L87" class = "LineNr" > 87 < / span > 89/< - %ebp 4/r32/esp
< span id = "L88" class = "LineNr" > 88 < / span > < span class = "subxComment" > #< / span >
< span id = "L89" class = "LineNr" > 89 < / span > 8b/-> *< span class = "SpecialChar" > < a href = '315stack-debug.subx.html#L121' > Really-debug-print< / a > < / span > 0/r32/eax
< span id = "L90" class = "LineNr" > 90 < / span > < span class = "Constant" > $debug-print?:end< / span > :
< span id = "L91" class = "LineNr" > 91 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L92" class = "LineNr" > 92 < / span > 89/< - %esp 5/r32/ebp
< span id = "L93" class = "LineNr" > 93 < / span > 5d/pop-to-ebp
< span id = "L94" class = "LineNr" > 94 < / span > c3/return
< span id = "L95" class = "LineNr" > 95 < / span >
< span id = "L96" class = "LineNr" > 96 < / span > < span class = "subxFunction" > turn-on-debug-print< / span > :
< span id = "L97" class = "LineNr" > 97 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L98" class = "LineNr" > 98 < / span > 55/push-ebp
< span id = "L99" class = "LineNr" > 99 < / span > 89/< - %ebp 4/r32/esp
< span id = "L100" class = "LineNr" > 100 < / span > < span class = "subxComment" > #< / span >
< span id = "L101" class = "LineNr" > 101 < / span > c7 0/subop/copy *< span class = "SpecialChar" > < a href = '315stack-debug.subx.html#L121' > Really-debug-print< / a > < / span > 1/imm32/true
< span id = "L102" class = "LineNr" > 102 < / span > < span class = "Constant" > $turn-on-debug-print:end< / span > :
< span id = "L103" class = "LineNr" > 103 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L104" class = "LineNr" > 104 < / span > 89/< - %esp 5/r32/ebp
< span id = "L105" class = "LineNr" > 105 < / span > 5d/pop-to-ebp
< span id = "L106" class = "LineNr" > 106 < / span > c3/return
< span id = "L107" class = "LineNr" > 107 < / span >
< span id = "L108" class = "LineNr" > 108 < / span > < span class = "subxFunction" > turn-off-debug-print< / span > :
< span id = "L109" class = "LineNr" > 109 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L110" class = "LineNr" > 110 < / span > 55/push-ebp
< span id = "L111" class = "LineNr" > 111 < / span > 89/< - %ebp 4/r32/esp
< span id = "L112" class = "LineNr" > 112 < / span > < span class = "subxComment" > #< / span >
< span id = "L113" class = "LineNr" > 113 < / span > c7 0/subop/copy *< span class = "SpecialChar" > < a href = '315stack-debug.subx.html#L121' > Really-debug-print< / a > < / span > 0/imm32/false
< span id = "L114" class = "LineNr" > 114 < / span > < span class = "Constant" > $turn-off-debug-print:end< / span > :
< span id = "L115" class = "LineNr" > 115 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L116" class = "LineNr" > 116 < / span > 89/< - %esp 5/r32/ebp
< span id = "L117" class = "LineNr" > 117 < / span > 5d/pop-to-ebp
< span id = "L118" class = "LineNr" > 118 < / span > c3/return
< span id = "L119" class = "LineNr" > 119 < / span >
< span id = "L120" class = "LineNr" > 120 < / span > == data
< span id = "L121" class = "LineNr" > 121 < / span > < span class = "SpecialChar" > Really-debug-print< / span > :
< span id = "L122" class = "LineNr" > 122 < / span > 0/imm32/false
< span id = "L123" class = "LineNr" > 123 < / span > < span class = "CommentedCode" > #? 1/imm32/true< / span >
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