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< title > Mu - 030translate.cc< / title >
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< meta name = "Generator" content = "Vim/8.1" >
< meta name = "plugin-version" content = "vim8.1_v1" >
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< meta name = "syntax" content = "cpp" >
< meta name = "settings" content = "number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=" >
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.LineNr { }
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.Comment { color: #005faf; }
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.Delimiter { color: #c000c0; }
.Special { color: #d70000; }
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< a href = 'https://github.com/akkartik/mu/blob/master/030translate.cc' > https://github.com/akkartik/mu/blob/master/030translate.cc< / a >
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< pre id = 'vimCodeElement' >
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< span id = "L1" class = "LineNr" > 1 < / span > < span class = "Comment" > //: After that lengthy prelude to define an x86 emulator, we are now ready to< / span >
< span id = "L2" class = "LineNr" > 2 < / span > < span class = "Comment" > //: start translating SubX notation.< / span >
< span id = "L3" class = "LineNr" > 3 < / span >
< span id = "L4" class = "LineNr" > 4 < / span > < span class = "Comment" > //: Translator workflow: read 'source' file. Run a series of transforms on it,< / span >
< span id = "L5" class = "LineNr" > 5 < / span > < span class = "Comment" > //: each passing through what it doesn't understand. The final program should< / span >
< span id = "L6" class = "LineNr" > 6 < / span > < span class = "Comment" > //: be just machine code, suitable to emulate, or to write to an ELF binary.< / span >
< span id = "L7" class = "LineNr" > 7 < / span >
< span id = "L8" class = "LineNr" > 8 < / span > < span class = "Delimiter" > :(before " End Main" )< / span >
< span id = "L9" class = "LineNr" > 9 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > < a href = '001help.cc.html#L102' > is_equal< / a > < span class = "Delimiter" > (< / span > argv[< span class = "Constant" > 1< / span > ]< span class = "Delimiter" > ,< / span > < span class = "Constant" > " translate" < / span > < span class = "Delimiter" > ))< / span > < span class = "Delimiter" > {< / span >
< span id = "L10" class = "LineNr" > 10 < / span > < span class = "Comment" > // Outside of tests, traces must be explicitly requested.< / span >
< span id = "L11" class = "LineNr" > 11 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > < span class = "Special" > < a href = '003trace.cc.html#L448' > Trace_file< / a > < / span > < span class = "Delimiter" > .< / span > is_open< span class = "Delimiter" > ())< / span > < span class = "Special" > < a href = '003trace.cc.html#L72' > Trace_stream< / a > < / span > = < span class = "Normal" > new< / span > trace_stream< span class = "Delimiter" > ;< / span >
< span id = "L12" class = "LineNr" > 12 < / span > < a href = '000organization.cc.html#L150' > reset< / a > < span class = "Delimiter" > ();< / span >
< span id = "L13" class = "LineNr" > 13 < / span > < span class = "Comment" > // Begin bootstrap translate< / span >
< span id = "L14" class = "LineNr" > 14 < / span > program p< span class = "Delimiter" > ;< / span >
< span id = "L15" class = "LineNr" > 15 < / span > string output_filename< span class = "Delimiter" > ;< / span >
< span id = "L16" class = "LineNr" > 16 < / span > < span class = "Normal" > for< / span > < span class = "Delimiter" > (< / span > < span class = "Normal" > int< / span > i = < span class = "Comment" > /*< / span > < span class = "Comment" > skip 'bootstrap translate'< / span > < span class = "Comment" > */< / span > < span class = "Constant" > 2< / span > < span class = "Delimiter" > ;< / span > i < argc< span class = "Delimiter" > ;< / span > ++i< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L17" class = "LineNr" > 17 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > < a href = '001help.cc.html#L102' > is_equal< / a > < span class = "Delimiter" > (< / span > argv[i]< span class = "Delimiter" > ,< / span > < span class = "Constant" > " -o" < / span > < span class = "Delimiter" > ))< / span > < span class = "Delimiter" > {< / span >
< span id = "L18" class = "LineNr" > 18 < / span > ++i< span class = "Delimiter" > ;< / span >
< span id = "L19" class = "LineNr" > 19 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > i > = argc< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
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< span id = "L20" class = "LineNr" > 20 < / span > < a href = '030translate.cc.html#L65' > print_translate_usage< / a > < span class = "Delimiter" > ();< / span >
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< span id = "L21" class = "LineNr" > 21 < / span > cerr < < < span class = "Constant" > " '-o' must be followed by a filename to write results to\n" < / span > < span class = "Delimiter" > ;< / span >
< span id = "L22" class = "LineNr" > 22 < / span > exit< span class = "Delimiter" > (< / span > < span class = "Constant" > 1< / span > < span class = "Delimiter" > );< / span >
< span id = "L23" class = "LineNr" > 23 < / span > < span class = "Delimiter" > }< / span >
< span id = "L24" class = "LineNr" > 24 < / span > output_filename = argv[i]< span class = "Delimiter" > ;< / span >
< span id = "L25" class = "LineNr" > 25 < / span > < span class = "Delimiter" > }< / span >
< span id = "L26" class = "LineNr" > 26 < / span > < span class = "Normal" > else< / span > < span class = "Delimiter" > {< / span >
< span id = "L27" class = "LineNr" > 27 < / span > < a href = '003trace.cc.html#L96' > trace< / a > < span class = "Delimiter" > (< / span > < span class = "Constant" > 2< / span > < span class = "Delimiter" > ,< / span > < span class = "Constant" > " parse" < / span > < span class = "Delimiter" > )< / span > < < argv[i] < < end< span class = "Delimiter" > ();< / span >
< span id = "L28" class = "LineNr" > 28 < / span > ifstream fin< span class = "Delimiter" > (< / span > argv[i]< span class = "Delimiter" > );< / span >
< span id = "L29" class = "LineNr" > 29 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > !fin< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L30" class = "LineNr" > 30 < / span > cerr < < < span class = "Constant" > " could not open " < / span > < < argv[i] < < < span class = "cSpecial" > '\n'< / span > < span class = "Delimiter" > ;< / span >
< span id = "L31" class = "LineNr" > 31 < / span > < span class = "Identifier" > return< / span > < span class = "Constant" > 1< / span > < span class = "Delimiter" > ;< / span >
< span id = "L32" class = "LineNr" > 32 < / span > < span class = "Delimiter" > }< / span >
< span id = "L33" class = "LineNr" > 33 < / span > parse< span class = "Delimiter" > (< / span > fin< span class = "Delimiter" > ,< / span > p< span class = "Delimiter" > );< / span >
< span id = "L34" class = "LineNr" > 34 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > < a href = '003trace.cc.html#L264' > trace_contains_errors< / a > < span class = "Delimiter" > ())< / span > < span class = "Identifier" > return< / span > < span class = "Constant" > 1< / span > < span class = "Delimiter" > ;< / span >
< span id = "L35" class = "LineNr" > 35 < / span > < span class = "Delimiter" > }< / span >
< span id = "L36" class = "LineNr" > 36 < / span > < span class = "Delimiter" > }< / span >
< span id = "L37" class = "LineNr" > 37 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L106' > segments< / a > < span class = "Delimiter" > .< / span > empty< span class = "Delimiter" > ())< / span > < span class = "Delimiter" > {< / span >
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< span id = "L38" class = "LineNr" > 38 < / span > < a href = '030translate.cc.html#L65' > print_translate_usage< / a > < span class = "Delimiter" > ();< / span >
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< span id = "L39" class = "LineNr" > 39 < / span > cerr < < < span class = "Constant" > " nothing to do; must provide at least one file to read\n" < / span > < span class = "Delimiter" > ;< / span >
< span id = "L40" class = "LineNr" > 40 < / span > exit< span class = "Delimiter" > (< / span > < span class = "Constant" > 1< / span > < span class = "Delimiter" > );< / span >
< span id = "L41" class = "LineNr" > 41 < / span > < span class = "Delimiter" > }< / span >
< span id = "L42" class = "LineNr" > 42 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > output_filename< span class = "Delimiter" > .< / span > empty< span class = "Delimiter" > ())< / span > < span class = "Delimiter" > {< / span >
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< span id = "L43" class = "LineNr" > 43 < / span > < a href = '030translate.cc.html#L65' > print_translate_usage< / a > < span class = "Delimiter" > ();< / span >
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< span id = "L44" class = "LineNr" > 44 < / span > cerr < < < span class = "Constant" > " must provide a filename to write to using '-o'\n" < / span > < span class = "Delimiter" > ;< / span >
< span id = "L45" class = "LineNr" > 45 < / span > exit< span class = "Delimiter" > (< / span > < span class = "Constant" > 1< / span > < span class = "Delimiter" > );< / span >
< span id = "L46" class = "LineNr" > 46 < / span > < span class = "Delimiter" > }< / span >
< span id = "L47" class = "LineNr" > 47 < / span > < a href = '003trace.cc.html#L96' > trace< / a > < span class = "Delimiter" > (< / span > < span class = "Constant" > 2< / span > < span class = "Delimiter" > ,< / span > < span class = "Constant" > " transform" < / span > < span class = "Delimiter" > )< / span > < < < span class = "Constant" > " begin" < / span > < < end< span class = "Delimiter" > ();< / span >
< span id = "L48" class = "LineNr" > 48 < / span > transform< span class = "Delimiter" > (< / span > p< span class = "Delimiter" > );< / span >
< span id = "L49" class = "LineNr" > 49 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > < a href = '003trace.cc.html#L264' > trace_contains_errors< / a > < span class = "Delimiter" > ())< / span > < span class = "Identifier" > return< / span > < span class = "Constant" > 1< / span > < span class = "Delimiter" > ;< / span >
< span id = "L50" class = "LineNr" > 50 < / span > < a href = '003trace.cc.html#L96' > trace< / a > < span class = "Delimiter" > (< / span > < span class = "Constant" > 2< / span > < span class = "Delimiter" > ,< / span > < span class = "Constant" > " translate" < / span > < span class = "Delimiter" > )< / span > < < < span class = "Constant" > " begin" < / span > < < end< span class = "Delimiter" > ();< / span >
< span id = "L51" class = "LineNr" > 51 < / span > save_elf< span class = "Delimiter" > (< / span > p< span class = "Delimiter" > ,< / span > output_filename< span class = "Delimiter" > );< / span >
< span id = "L52" class = "LineNr" > 52 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > < a href = '003trace.cc.html#L264' > trace_contains_errors< / a > < span class = "Delimiter" > ())< / span > < span class = "Delimiter" > {< / span >
< span id = "L53" class = "LineNr" > 53 < / span > unlink< span class = "Delimiter" > (< / span > output_filename< span class = "Delimiter" > .< / span > c_str< span class = "Delimiter" > ());< / span >
< span id = "L54" class = "LineNr" > 54 < / span > < span class = "Identifier" > return< / span > < span class = "Constant" > 1< / span > < span class = "Delimiter" > ;< / span >
< span id = "L55" class = "LineNr" > 55 < / span > < span class = "Delimiter" > }< / span >
< span id = "L56" class = "LineNr" > 56 < / span > < span class = "Comment" > // End bootstrap translate< / span >
< span id = "L57" class = "LineNr" > 57 < / span > < span class = "Identifier" > return< / span > < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span >
< span id = "L58" class = "LineNr" > 58 < / span > < span class = "Delimiter" > }< / span >
< span id = "L59" class = "LineNr" > 59 < / span >
< span id = "L60" class = "LineNr" > 60 < / span > < span class = "Delimiter" > :(code)< / span >
< span id = "L61" class = "LineNr" > 61 < / span > < span class = "Normal" > void< / span > transform< span class = "Delimiter" > (< / span > program& p< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L62" class = "LineNr" > 62 < / span > < span class = "Comment" > // End transform(program& p)< / span >
< span id = "L63" class = "LineNr" > 63 < / span > < span class = "Delimiter" > }< / span >
< span id = "L64" class = "LineNr" > 64 < / span >
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< span id = "L65" class = "LineNr" > 65 < / span > < span class = "Normal" > void< / span > < a href = '030translate.cc.html#L65' > print_translate_usage< / a > < span class = "Delimiter" > ()< / span > < span class = "Delimiter" > {< / span >
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< span id = "L66" class = "LineNr" > 66 < / span > cerr < < < span class = "Constant" > " Usage: bootstrap translate file1 file2 ... -o output\n" < / span > < span class = "Delimiter" > ;< / span >
< span id = "L67" class = "LineNr" > 67 < / span > < span class = "Delimiter" > }< / span >
< span id = "L68" class = "LineNr" > 68 < / span >
< span id = "L69" class = "LineNr" > 69 < / span > < span class = "Comment" > // write out a program to a bare-bones ELF file< / span >
< span id = "L70" class = "LineNr" > 70 < / span > < span class = "Normal" > void< / span > save_elf< span class = "Delimiter" > (< / span > < span class = "Normal" > const< / span > program& p< span class = "Delimiter" > ,< / span > < span class = "Normal" > const< / span > string& filename< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L71" class = "LineNr" > 71 < / span > ofstream out< span class = "Delimiter" > (< / span > filename< span class = "Delimiter" > .< / span > c_str< span class = "Delimiter" > (),< / span > ios::binary< span class = "Delimiter" > );< / span >
< span id = "L72" class = "LineNr" > 72 < / span > save_elf< span class = "Delimiter" > (< / span > p< span class = "Delimiter" > ,< / span > out< span class = "Delimiter" > );< / span >
< span id = "L73" class = "LineNr" > 73 < / span > out< span class = "Delimiter" > .< / span > close< span class = "Delimiter" > ();< / span >
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< span id = "L74" class = "LineNr" > 74 < / span > < span class = "Delimiter" > }< / span >
< span id = "L75" class = "LineNr" > 75 < / span >
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< span id = "L76" class = "LineNr" > 76 < / span > < span class = "Normal" > void< / span > save_elf< span class = "Delimiter" > (< / span > < span class = "Normal" > const< / span > program& p< span class = "Delimiter" > ,< / span > ostream& out< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L77" class = "LineNr" > 77 < / span > < span class = "Comment" > // validation: stay consistent with the self-hosted translator< / span >
< span id = "L78" class = "LineNr" > 78 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L105' > entry< / a > == < span class = "Constant" > 0< / span > < span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L79" class = "LineNr" > 79 < / span > < a href = '003trace.cc.html#L228' > raise< / a > < < < span class = "Constant" > " no 'Entry' label found\n" < / span > < < end< span class = "Delimiter" > ();< / span >
< span id = "L80" class = "LineNr" > 80 < / span > < span class = "Identifier" > return< / span > < span class = "Delimiter" > ;< / span >
< span id = "L81" class = "LineNr" > 81 < / span > < span class = "Delimiter" > }< / span >
< span id = "L82" class = "LineNr" > 82 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > find< span class = "Delimiter" > (< / span > p< span class = "Delimiter" > ,< / span > < span class = "Constant" > " data" < / span > < span class = "Delimiter" > )< / span > == < span class = "Constant" > NULL< / span > < span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L83" class = "LineNr" > 83 < / span > < a href = '003trace.cc.html#L228' > raise< / a > < < < span class = "Constant" > " must include a 'data' segment\n" < / span > < < end< span class = "Delimiter" > ();< / span >
< span id = "L84" class = "LineNr" > 84 < / span > < span class = "Identifier" > return< / span > < span class = "Delimiter" > ;< / span >
< span id = "L85" class = "LineNr" > 85 < / span > < span class = "Delimiter" > }< / span >
< span id = "L86" class = "LineNr" > 86 < / span > < span class = "Comment" > // processing< / span >
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< span id = "L87" class = "LineNr" > 87 < / span > < a href = '030translate.cc.html#L92' > write_elf_header< / a > < span class = "Delimiter" > (< / span > out< span class = "Delimiter" > ,< / span > p< span class = "Delimiter" > );< / span >
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< span id = "L88" class = "LineNr" > 88 < / span > < span class = "Normal" > for< / span > < span class = "Delimiter" > (< / span > < span class = "Normal" > size_t< / span > i = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span > i < p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L106' > segments< / a > < span class = "Delimiter" > .< / span > size< span class = "Delimiter" > ();< / span > ++i< span class = "Delimiter" > )< / span >
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< span id = "L89" class = "LineNr" > 89 < / span > < a href = '030translate.cc.html#L188' > write_segment< / a > < span class = "Delimiter" > (< / span > p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L106' > segments< / a > < span class = "Delimiter" > .< / span > at< span class = "Delimiter" > (< / span > i< span class = "Delimiter" > ),< / span > out< span class = "Delimiter" > );< / span >
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< span id = "L90" class = "LineNr" > 90 < / span > < span class = "Delimiter" > }< / span >
< span id = "L91" class = "LineNr" > 91 < / span >
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< span id = "L92" class = "LineNr" > 92 < / span > < span class = "Normal" > void< / span > < a href = '030translate.cc.html#L92' > write_elf_header< / a > < span class = "Delimiter" > (< / span > ostream& out< span class = "Delimiter" > ,< / span > < span class = "Normal" > const< / span > program& p< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
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< span id = "L93" class = "LineNr" > 93 < / span > < span class = "Normal" > char< / span > c = < span class = "cSpecial" > '\0'< / span > < span class = "Delimiter" > ;< / span >
< span id = "L94" class = "LineNr" > 94 < / span > < span class = "PreProc" > #define < / span > < span class = "Special" > O< / span > < span class = "PreProc" > (< / span > < span class = "Special" > X< / span > < span class = "PreProc" > ) c = (< / span > < span class = "Special" > X< / span > < span class = "PreProc" > )< / span > < span class = "Delimiter" > ;< / span > < span class = "PreProc" > out< / span > < span class = "Delimiter" > .< / span > < span class = "PreProc" > write(& c< / span > < span class = "Delimiter" > ,< / span > < span class = "PreProc" > < / span > < span class = "Normal" > sizeof< / span > < span class = "PreProc" > (c))< / span >
< span id = "L95" class = "LineNr" > 95 < / span > < span class = "Comment" > // host is required to be little-endian< / span >
< span id = "L96" class = "LineNr" > 96 < / span > < span class = "PreProc" > #define emit(< / span > < span class = "Special" > X< / span > < span class = "PreProc" > ) out< / span > < span class = "Delimiter" > .< / span > < span class = "PreProc" > write(< / span > < span class = "Normal" > reinterpret_cast< / span > < span class = "PreProc" > < < / span > < span class = "Normal" > const< / span > < span class = "PreProc" > < / span > < span class = "Normal" > char< / span > < span class = "PreProc" > *> (& < / span > < span class = "Special" > X< / span > < span class = "PreProc" > )< / span > < span class = "Delimiter" > ,< / span > < span class = "PreProc" > < / span > < span class = "Normal" > sizeof< / span > < span class = "PreProc" > (< / span > < span class = "Special" > X< / span > < span class = "PreProc" > ))< / span >
< span id = "L97" class = "LineNr" > 97 < / span > < span class = "SalientComment" > //// ehdr< / span >
< span id = "L98" class = "LineNr" > 98 < / span > < span class = "Comment" > // e_ident< / span >
< span id = "L99" class = "LineNr" > 99 < / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x7f< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Comment" > /*< / span > < span class = "Comment" > E< / span > < span class = "Comment" > */< / span > < span class = "Constant" > 0x45< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Comment" > /*< / span > < span class = "Comment" > L< / span > < span class = "Comment" > */< / span > < span class = "Constant" > 0x4c< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Comment" > /*< / span > < span class = "Comment" > F< / span > < span class = "Comment" > */< / span > < span class = "Constant" > 0x46< / span > < span class = "Delimiter" > );< / span >
< span id = "L100" class = "LineNr" > 100 < / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x1< / span > < span class = "Delimiter" > );< / span > < span class = "Comment" > // 32-bit format< / span >
< span id = "L101" class = "LineNr" > 101 < / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x1< / span > < span class = "Delimiter" > );< / span > < span class = "Comment" > // little-endian< / span >
< span id = "L102" class = "LineNr" > 102 < / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x1< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x0< / span > < span class = "Delimiter" > );< / span >
< span id = "L103" class = "LineNr" > 103 < / span > < span class = "Normal" > for< / span > < span class = "Delimiter" > (< / span > < span class = "Normal" > size_t< / span > i = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span > i < < span class = "Constant" > 8< / span > < span class = "Delimiter" > ;< / span > ++i< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x0< / span > < span class = "Delimiter" > );< / span > < span class = "Delimiter" > }< / span >
< span id = "L104" class = "LineNr" > 104 < / span > < span class = "Comment" > // e_type< / span >
< span id = "L105" class = "LineNr" > 105 < / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x02< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x00< / span > < span class = "Delimiter" > );< / span >
< span id = "L106" class = "LineNr" > 106 < / span > < span class = "Comment" > // e_machine< / span >
< span id = "L107" class = "LineNr" > 107 < / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x03< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x00< / span > < span class = "Delimiter" > );< / span >
< span id = "L108" class = "LineNr" > 108 < / span > < span class = "Comment" > // e_version< / span >
< span id = "L109" class = "LineNr" > 109 < / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x01< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x00< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x00< / span > < span class = "Delimiter" > );< / span > < span class = "Special" > O< / span > < span class = "Delimiter" > (< / span > < span class = "Constant" > 0x00< / span > < span class = "Delimiter" > );< / span >
< span id = "L110" class = "LineNr" > 110 < / span > < span class = "Comment" > // e_entry< / span >
< span id = "L111" class = "LineNr" > 111 < / span > < span class = "Normal" > uint32_t< / span > e_entry = p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L105' > entry< / a > < span class = "Delimiter" > ;< / span >
< span id = "L112" class = "LineNr" > 112 < / span > < span class = "Comment" > // Override e_entry< / span >
< span id = "L113" class = "LineNr" > 113 < / span > emit< span class = "Delimiter" > (< / span > e_entry< span class = "Delimiter" > );< / span >
< span id = "L114" class = "LineNr" > 114 < / span > < span class = "Comment" > // e_phoff -- immediately after ELF header< / span >
< span id = "L115" class = "LineNr" > 115 < / span > < span class = "Normal" > uint32_t< / span > e_phoff = < span class = "Constant" > 0x34< / span > < span class = "Delimiter" > ;< / span >
< span id = "L116" class = "LineNr" > 116 < / span > emit< span class = "Delimiter" > (< / span > e_phoff< span class = "Delimiter" > );< / span >
< span id = "L117" class = "LineNr" > 117 < / span > < span class = "Comment" > // e_shoff; unused< / span >
< span id = "L118" class = "LineNr" > 118 < / span > < span class = "Normal" > uint32_t< / span > dummy32 = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span >
< span id = "L119" class = "LineNr" > 119 < / span > emit< span class = "Delimiter" > (< / span > dummy32< span class = "Delimiter" > );< / span >
< span id = "L120" class = "LineNr" > 120 < / span > < span class = "Comment" > // e_flags; unused< / span >
< span id = "L121" class = "LineNr" > 121 < / span > emit< span class = "Delimiter" > (< / span > dummy32< span class = "Delimiter" > );< / span >
< span id = "L122" class = "LineNr" > 122 < / span > < span class = "Comment" > // e_ehsize< / span >
< span id = "L123" class = "LineNr" > 123 < / span > < span class = "Normal" > uint16_t< / span > e_ehsize = < span class = "Constant" > 0x34< / span > < span class = "Delimiter" > ;< / span >
< span id = "L124" class = "LineNr" > 124 < / span > emit< span class = "Delimiter" > (< / span > e_ehsize< span class = "Delimiter" > );< / span >
< span id = "L125" class = "LineNr" > 125 < / span > < span class = "Comment" > // e_phentsize< / span >
< span id = "L126" class = "LineNr" > 126 < / span > < span class = "Normal" > uint16_t< / span > e_phentsize = < span class = "Constant" > 0x20< / span > < span class = "Delimiter" > ;< / span >
< span id = "L127" class = "LineNr" > 127 < / span > emit< span class = "Delimiter" > (< / span > e_phentsize< span class = "Delimiter" > );< / span >
< span id = "L128" class = "LineNr" > 128 < / span > < span class = "Comment" > // e_phnum< / span >
< span id = "L129" class = "LineNr" > 129 < / span > < span class = "Normal" > uint16_t< / span > e_phnum = < a href = '001help.cc.html#L170' > SIZE< / a > < span class = "Delimiter" > (< / span > p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L106' > segments< / a > < span class = "Delimiter" > );< / span >
< span id = "L130" class = "LineNr" > 130 < / span > emit< span class = "Delimiter" > (< / span > e_phnum< span class = "Delimiter" > );< / span >
< span id = "L131" class = "LineNr" > 131 < / span > < span class = "Comment" > // e_shentsize< / span >
< span id = "L132" class = "LineNr" > 132 < / span > < span class = "Normal" > uint16_t< / span > dummy16 = < span class = "Constant" > 0x0< / span > < span class = "Delimiter" > ;< / span >
< span id = "L133" class = "LineNr" > 133 < / span > emit< span class = "Delimiter" > (< / span > dummy16< span class = "Delimiter" > );< / span >
< span id = "L134" class = "LineNr" > 134 < / span > < span class = "Comment" > // e_shnum< / span >
< span id = "L135" class = "LineNr" > 135 < / span > emit< span class = "Delimiter" > (< / span > dummy16< span class = "Delimiter" > );< / span >
< span id = "L136" class = "LineNr" > 136 < / span > < span class = "Comment" > // e_shstrndx< / span >
< span id = "L137" class = "LineNr" > 137 < / span > emit< span class = "Delimiter" > (< / span > dummy16< span class = "Delimiter" > );< / span >
< span id = "L138" class = "LineNr" > 138 < / span >
< span id = "L139" class = "LineNr" > 139 < / span > < span class = "Normal" > uint32_t< / span > p_offset = < span class = "Comment" > /*< / span > < span class = "Comment" > size of ehdr< / span > < span class = "Comment" > */< / span > < span class = "Constant" > 0x34< / span > + < a href = '001help.cc.html#L170' > SIZE< / a > < span class = "Delimiter" > (< / span > p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L106' > segments< / a > < span class = "Delimiter" > )< / span > *< span class = "Constant" > 0x20< / span > < span class = "Comment" > /*< / span > < span class = "Comment" > size of each phdr< / span > < span class = "Comment" > */< / span > < span class = "Delimiter" > ;< / span >
< span id = "L140" class = "LineNr" > 140 < / span > < span class = "Normal" > for< / span > < span class = "Delimiter" > (< / span > < span class = "Normal" > int< / span > i = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span > i < < a href = '001help.cc.html#L170' > SIZE< / a > < span class = "Delimiter" > (< / span > p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L106' > segments< / a > < span class = "Delimiter" > );< / span > ++i< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L141" class = "LineNr" > 141 < / span > < span class = "Normal" > const< / span > segment& curr = p< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L106' > segments< / a > < span class = "Delimiter" > .< / span > at< span class = "Delimiter" > (< / span > i< span class = "Delimiter" > );< / span >
< span id = "L142" class = "LineNr" > 142 < / span > < span class = "SalientComment" > //// phdr< / span >
< span id = "L143" class = "LineNr" > 143 < / span > < span class = "Comment" > // p_type< / span >
< span id = "L144" class = "LineNr" > 144 < / span > < span class = "Normal" > uint32_t< / span > p_type = < span class = "Constant" > 0x1< / span > < span class = "Delimiter" > ;< / span >
< span id = "L145" class = "LineNr" > 145 < / span > emit< span class = "Delimiter" > (< / span > p_type< span class = "Delimiter" > );< / span >
< span id = "L146" class = "LineNr" > 146 < / span > < span class = "Comment" > // p_offset< / span >
< span id = "L147" class = "LineNr" > 147 < / span > emit< span class = "Delimiter" > (< / span > p_offset< span class = "Delimiter" > );< / span >
< span id = "L148" class = "LineNr" > 148 < / span > < span class = "Comment" > // p_vaddr< / span >
< span id = "L149" class = "LineNr" > 149 < / span > < span class = "Normal" > uint32_t< / span > p_start = curr< span class = "Delimiter" > .< / span > start< span class = "Delimiter" > ;< / span >
< span id = "L150" class = "LineNr" > 150 < / span > emit< span class = "Delimiter" > (< / span > p_start< span class = "Delimiter" > );< / span >
< span id = "L151" class = "LineNr" > 151 < / span > < span class = "Comment" > // p_paddr< / span >
< span id = "L152" class = "LineNr" > 152 < / span > emit< span class = "Delimiter" > (< / span > p_start< span class = "Delimiter" > );< / span >
< span id = "L153" class = "LineNr" > 153 < / span > < span class = "Comment" > // p_filesz< / span >
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< span id = "L154" class = "LineNr" > 154 < / span > < span class = "Normal" > uint32_t< / span > size = < a href = '030translate.cc.html#L198' > num_words< / a > < span class = "Delimiter" > (< / span > curr< span class = "Delimiter" > );< / span >
< span id = "L155" class = "LineNr" > 155 < / span > assert< span class = "Delimiter" > (< / span > p_offset + size < < a href = '010vm.cc.html#L89' > SEGMENT_ALIGNMENT< / a > < span class = "Delimiter" > );< / span >
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< span id = "L156" class = "LineNr" > 156 < / span > emit< span class = "Delimiter" > (< / span > size< span class = "Delimiter" > );< / span >
< span id = "L157" class = "LineNr" > 157 < / span > < span class = "Comment" > // p_memsz< / span >
< span id = "L158" class = "LineNr" > 158 < / span > emit< span class = "Delimiter" > (< / span > size< span class = "Delimiter" > );< / span >
< span id = "L159" class = "LineNr" > 159 < / span > < span class = "Comment" > // p_flags< / span >
< span id = "L160" class = "LineNr" > 160 < / span > < span class = "Normal" > uint32_t< / span > p_flags = < span class = "Delimiter" > (< / span > curr< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L111' > name< / a > == < span class = "Constant" > " code" < / span > < span class = "Delimiter" > )< / span > ? < span class = "Comment" > /*< / span > < span class = "Comment" > r-x< / span > < span class = "Comment" > */< / span > < span class = "Constant" > 0x5< / span > : < span class = "Comment" > /*< / span > < span class = "Comment" > rw-< / span > < span class = "Comment" > */< / span > < span class = "Constant" > 0x6< / span > < span class = "Delimiter" > ;< / span >
< span id = "L161" class = "LineNr" > 161 < / span > emit< span class = "Delimiter" > (< / span > p_flags< span class = "Delimiter" > );< / span >
< span id = "L162" class = "LineNr" > 162 < / span >
< span id = "L163" class = "LineNr" > 163 < / span > < span class = "Comment" > // p_align< / span >
< span id = "L164" class = "LineNr" > 164 < / span > < span class = "Comment" > // " As the system creates or augments a process image, it logically copies< / span >
< span id = "L165" class = "LineNr" > 165 < / span > < span class = "Comment" > // a file's segment to a virtual memory segment. When—and if— the system< / span >
< span id = "L166" class = "LineNr" > 166 < / span > < span class = "Comment" > // physically reads the file depends on the program's execution behavior,< / span >
< span id = "L167" class = "LineNr" > 167 < / span > < span class = "Comment" > // system load, and so on. A process does not require a physical page< / span >
< span id = "L168" class = "LineNr" > 168 < / span > < span class = "Comment" > // unless it references the logical page during execution, and processes< / span >
< span id = "L169" class = "LineNr" > 169 < / span > < span class = "Comment" > // commonly leave many pages unreferenced. Therefore delaying physical< / span >
< span id = "L170" class = "LineNr" > 170 < / span > < span class = "Comment" > // reads frequently obviates them, improving system performance. To obtain< / span >
< span id = "L171" class = "LineNr" > 171 < / span > < span class = "Comment" > // this efficiency in practice, executable and shared object files must< / span >
< span id = "L172" class = "LineNr" > 172 < / span > < span class = "Comment" > // have segment images whose file offsets and virtual addresses are< / span >
< span id = "L173" class = "LineNr" > 173 < / span > < span class = "Comment" > // congruent, modulo the page size." -- < a href = "http://refspecs.linuxbase.org/elf/elf.pdf" > http://refspecs.linuxbase.org/elf/elf.pdf< / a > (page 95)< / span >
< span id = "L174" class = "LineNr" > 174 < / span > < span class = "Normal" > uint32_t< / span > p_align = < span class = "Constant" > 0x1000< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // default page size on linux< / span >
< span id = "L175" class = "LineNr" > 175 < / span > emit< span class = "Delimiter" > (< / span > p_align< span class = "Delimiter" > );< / span >
< span id = "L176" class = "LineNr" > 176 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > p_offset % p_align != p_start % p_align< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
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< span id = "L177" class = "LineNr" > 177 < / span > < a href = '003trace.cc.html#L228' > raise< / a > < < < span class = "Constant" > " segment starting at 0x" < / span > < < < a href = '010vm.cc.html#L395' > HEXWORD< / a > < < p_start < < < span class = "Constant" > " is improperly aligned; alignment for p_offset " < / span > < < p_offset < < < span class = "Constant" > " should be " < / span > < < < span class = "Delimiter" > (< / span > p_offset % p_align< span class = "Delimiter" > )< / span > < < < span class = "Constant" > " but is " < / span > < < < span class = "Delimiter" > (< / span > p_start % p_align< span class = "Delimiter" > )< / span > < < < span class = "cSpecial" > '\n'< / span > < < end< span class = "Delimiter" > ();< / span >
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< span id = "L178" class = "LineNr" > 178 < / span > < span class = "Identifier" > return< / span > < span class = "Delimiter" > ;< / span >
< span id = "L179" class = "LineNr" > 179 < / span > < span class = "Delimiter" > }< / span >
< span id = "L180" class = "LineNr" > 180 < / span >
< span id = "L181" class = "LineNr" > 181 < / span > < span class = "Comment" > // prepare for next segment< / span >
< span id = "L182" class = "LineNr" > 182 < / span > p_offset += size< span class = "Delimiter" > ;< / span >
< span id = "L183" class = "LineNr" > 183 < / span > < span class = "Delimiter" > }< / span >
< span id = "L184" class = "LineNr" > 184 < / span > < span class = "PreProc" > #undef < / span > < span class = "Special" > O< / span >
< span id = "L185" class = "LineNr" > 185 < / span > < span class = "PreProc" > #undef emit< / span >
< span id = "L186" class = "LineNr" > 186 < / span > < span class = "Delimiter" > }< / span >
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< span id = "L187" class = "LineNr" > 187 < / span >
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< span id = "L188" class = "LineNr" > 188 < / span > < span class = "Normal" > void< / span > < a href = '030translate.cc.html#L188' > write_segment< / a > < span class = "Delimiter" > (< / span > < span class = "Normal" > const< / span > segment& s< span class = "Delimiter" > ,< / span > ostream& out< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
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< span id = "L189" class = "LineNr" > 189 < / span > < span class = "Normal" > for< / span > < span class = "Delimiter" > (< / span > < span class = "Normal" > int< / span > i = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span > i < < a href = '001help.cc.html#L170' > SIZE< / a > < span class = "Delimiter" > (< / span > s< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L113' > lines< / a > < span class = "Delimiter" > );< / span > ++i< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L190" class = "LineNr" > 190 < / span > < span class = "Normal" > const< / span > vector< word> & w = s< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L113' > lines< / a > < span class = "Delimiter" > .< / span > at< span class = "Delimiter" > (< / span > i< span class = "Delimiter" > ).< / span > < a href = '011run.cc.html#L122' > words< / a > < span class = "Delimiter" > ;< / span >
< span id = "L191" class = "LineNr" > 191 < / span > < span class = "Normal" > for< / span > < span class = "Delimiter" > (< / span > < span class = "Normal" > int< / span > j = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span > j < < a href = '001help.cc.html#L170' > SIZE< / a > < span class = "Delimiter" > (< / span > w< span class = "Delimiter" > );< / span > ++j< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L192" class = "LineNr" > 192 < / span > < span class = "Normal" > uint8_t< / span > x = < a href = '011run.cc.html#L288' > hex_byte< / a > < span class = "Delimiter" > (< / span > w< span class = "Delimiter" > .< / span > at< span class = "Delimiter" > (< / span > j< span class = "Delimiter" > ).< / span > data< span class = "Delimiter" > );< / span > < span class = "Comment" > // we're done with metadata by this point< / span >
< span id = "L193" class = "LineNr" > 193 < / span > out< span class = "Delimiter" > .< / span > write< span class = "Delimiter" > (< / span > < span class = "Normal" > reinterpret_cast< / span > < < span class = "Normal" > const< / span > < span class = "Normal" > char< / span > *> < span class = "Delimiter" > (< / span > & x< span class = "Delimiter" > ),< / span > < span class = "Comment" > /*< / span > < span class = "Comment" > sizeof(byte)< / span > < span class = "Comment" > */< / span > < span class = "Constant" > 1< / span > < span class = "Delimiter" > );< / span >
< span id = "L194" class = "LineNr" > 194 < / span > < span class = "Delimiter" > }< / span >
< span id = "L195" class = "LineNr" > 195 < / span > < span class = "Delimiter" > }< / span >
< span id = "L196" class = "LineNr" > 196 < / span > < span class = "Delimiter" > }< / span >
< span id = "L197" class = "LineNr" > 197 < / span >
2020-05-25 05:43:18 +00:00
< span id = "L198" class = "LineNr" > 198 < / span > < span class = "Normal" > uint32_t< / span > < a href = '030translate.cc.html#L198' > num_words< / a > < span class = "Delimiter" > (< / span > < span class = "Normal" > const< / span > segment& s< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
2020-01-14 09:48:06 +00:00
< span id = "L199" class = "LineNr" > 199 < / span > < span class = "Normal" > uint32_t< / span > sum = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span >
< span id = "L200" class = "LineNr" > 200 < / span > < span class = "Normal" > for< / span > < span class = "Delimiter" > (< / span > < span class = "Normal" > int< / span > i = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span > i < < a href = '001help.cc.html#L170' > SIZE< / a > < span class = "Delimiter" > (< / span > s< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L113' > lines< / a > < span class = "Delimiter" > );< / span > ++i< span class = "Delimiter" > )< / span >
< span id = "L201" class = "LineNr" > 201 < / span > sum += < a href = '001help.cc.html#L170' > SIZE< / a > < span class = "Delimiter" > (< / span > s< span class = "Delimiter" > .< / span > < a href = '011run.cc.html#L113' > lines< / a > < span class = "Delimiter" > .< / span > at< span class = "Delimiter" > (< / span > i< span class = "Delimiter" > ).< / span > < a href = '011run.cc.html#L122' > words< / a > < span class = "Delimiter" > );< / span >
< span id = "L202" class = "LineNr" > 202 < / span > < span class = "Identifier" > return< / span > sum< span class = "Delimiter" > ;< / span >
2019-08-25 22:53:24 +00:00
< span id = "L203" class = "LineNr" > 203 < / span > < span class = "Delimiter" > }< / span >
< span id = "L204" class = "LineNr" > 204 < / span >
2020-01-14 09:48:06 +00:00
< span id = "L205" class = "LineNr" > 205 < / span > < span class = "Delimiter" > :(before " End Includes" )< / span >
< span id = "L206" class = "LineNr" > 206 < / span > < span class = "Normal" > using< / span > std::ios< span class = "Delimiter" > ;< / span >
2018-08-14 04:25:22 +00:00
< / pre >
< / body >
< / html >
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