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Diffstat (limited to 'html/subx/examples/ex10.subx.html')
| -rw-r--r-- | html/subx/examples/ex10.subx.html | 105 |
1 files changed, 52 insertions, 53 deletions
diff --git a/html/subx/examples/ex10.subx.html b/html/subx/examples/ex10.subx.html index 8e7a698e..074cd0e8 100644 --- a/html/subx/examples/ex10.subx.html +++ b/html/subx/examples/ex10.subx.html @@ -56,9 +56,9 @@ if ('onhashchange' in window) { <pre id='vimCodeElement'> <span id="L1" class="LineNr"> 1 </span><span class="SalientComment">## String comparison: return 1 iff the two args passed in at the commandline are equal.</span> <span id="L2" class="LineNr"> 2 </span><span class="Comment">#</span> -<span id="L3" class="LineNr"> 3 </span><span class="Comment"># To run:</span> -<span id="L4" class="LineNr"> 4 </span><span class="Comment"># $ subx translate ex10.subx ex10</span> -<span id="L5" class="LineNr"> 5 </span><span class="Comment"># $ subx run ex10 abc abd</span> +<span id="L3" class="LineNr"> 3 </span><span class="Comment"># To run (from the subx directory):</span> +<span id="L4" class="LineNr"> 4 </span><span class="Comment"># $ subx translate examples/ex10.subx -o examples/ex10</span> +<span id="L5" class="LineNr"> 5 </span><span class="Comment"># $ subx run examples/ex10 abc abd</span> <span id="L6" class="LineNr"> 6 </span><span class="Comment"># Expected result:</span> <span id="L7" class="LineNr"> 7 </span><span class="Comment"># $ echo $?</span> <span id="L8" class="LineNr"> 8 </span><span class="Comment"># 0 # false</span> @@ -74,56 +74,55 @@ if ('onhashchange' in window) { <span id="L18" class="LineNr">18 </span><span class="Comment"># argv[0]: *(ESP+4)</span> <span id="L19" class="LineNr">19 </span><span class="Comment"># argv[1]: *(ESP+8)</span> <span id="L20" class="LineNr">20 </span><span class="Comment"># ...</span> -<span id="L21" class="LineNr">21 </span> <span class="Comment"># s1 = argv[1] (EAX)</span> -<span id="L22" class="LineNr">22 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 0/r32/EAX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+8) to EAX</span> -<span id="L23" class="LineNr">23 </span> <span class="Comment"># s2 = argv[2] (EBX)</span> -<span id="L24" class="LineNr">24 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 3/r32/EBX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+12) to EBX</span> -<span id="L25" class="LineNr">25 </span> <span class="Comment"># call argv_equal(s1, s2)</span> -<span id="L26" class="LineNr">26 </span> <span class="Comment"># push args</span> -<span id="L27" class="LineNr">27 </span> 50/push-EAX -<span id="L28" class="LineNr">28 </span> 53/push-EBX -<span id="L29" class="LineNr">29 </span> <span class="Comment"># call</span> -<span id="L30" class="LineNr">30 </span> e8/call argv_equal/disp32 -<span id="L31" class="LineNr">31 </span> <span class="Comment"># exit(EAX)</span> -<span id="L32" class="LineNr">32 </span>$exit: -<span id="L33" class="LineNr">33 </span> 89/copy 3/mod/direct 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy EAX to EBX</span> -<span id="L34" class="LineNr">34 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/imm32 <span class="Comment"># copy 1 to EAX</span> -<span id="L35" class="LineNr">35 </span> cd/syscall 0x80/imm8 -<span id="L36" class="LineNr">36 </span> -<span id="L37" class="LineNr">37 </span><span class="Comment"># compare two null-terminated ascii strings</span> -<span id="L38" class="LineNr">38 </span><span class="Comment"># reason for the name: the only place we should have null-terminated ascii strings is from commandline args</span> -<span id="L39" class="LineNr">39 </span>argv_equal: <span class="Comment"># (s1, s2) : null-terminated ascii strings -> EAX : boolean</span> -<span id="L40" class="LineNr">40 </span> <span class="Comment"># initialize s1 (ECX) and s2 (EDX)</span> -<span id="L41" class="LineNr">41 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 1/r32/ECX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+8) to ECX</span> -<span id="L42" class="LineNr">42 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 2/r32/EDX 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+4) to EDX</span> -<span id="L43" class="LineNr">43 </span> <span class="Comment"># while (true)</span> -<span id="L44" class="LineNr">44 </span>$argv_loop: -<span id="L45" class="LineNr">45 </span> <span class="Comment"># c1/EAX, c2/EBX = *s1, *s2</span> -<span id="L46" class="LineNr">46 </span> b8/copy 0/imm32 <span class="Comment"># clear EAX</span> -<span id="L47" class="LineNr">47 </span> 8a/copy 0/mod/indirect 1/rm32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *ECX to lower byte of EAX</span> -<span id="L48" class="LineNr">48 </span> bb/copy 0/imm32 <span class="Comment"># clear EBX</span> -<span id="L49" class="LineNr">49 </span> 8a/copy 0/mod/indirect 2/rm32/EDX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *EDX to lower byte of EBX</span> -<span id="L50" class="LineNr">50 </span> <span class="Comment"># if (c1 == 0) break</span> -<span id="L51" class="LineNr">51 </span> 3d/compare <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># compare EAX with 0</span> -<span id="L52" class="LineNr">52 </span> 74/jump-if-equal $argv_break/disp8 -<span id="L53" class="LineNr">53 </span> <span class="Comment"># if (c1 != c2) return false</span> -<span id="L54" class="LineNr">54 </span> 39/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare EAX with EBX</span> -<span id="L55" class="LineNr">55 </span> 75/jump-if-not-equal $argv_fail/disp8 -<span id="L56" class="LineNr">56 </span> <span class="Comment"># ++s1, ++s2</span> -<span id="L57" class="LineNr">57 </span> 41/inc-ECX -<span id="L58" class="LineNr">58 </span> 42/inc-EDX -<span id="L59" class="LineNr">59 </span> <span class="Comment"># end while</span> -<span id="L60" class="LineNr">60 </span> eb/jump $argv_loop/disp8 -<span id="L61" class="LineNr">61 </span>$argv_break: -<span id="L62" class="LineNr">62 </span> <span class="Comment"># if (c2 == 0) return true</span> -<span id="L63" class="LineNr">63 </span> 81 7/subop/compare 3/mod/direct 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># compare EBX with 0</span> -<span id="L64" class="LineNr">64 </span> 75/jump-if-not-equal $argv_fail/disp8 -<span id="L65" class="LineNr">65 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/imm32 <span class="Comment"># copy 1 to EAX</span> -<span id="L66" class="LineNr">66 </span> c3/return -<span id="L67" class="LineNr">67 </span> <span class="Comment"># return false</span> -<span id="L68" class="LineNr">68 </span>$argv_fail: -<span id="L69" class="LineNr">69 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># copy 0 to EAX</span> -<span id="L70" class="LineNr">70 </span> c3/return +<span id="L21" class="LineNr">21 </span> <span class="Comment"># prolog</span> +<span id="L22" class="LineNr">22 </span> 89/copy 3/mod/direct 5/rm32/EBP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/r32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy ESP to EBP</span> +<span id="L23" class="LineNr">23 </span> <span class="Comment"># call argv_equal(argv[1], argv[2])</span> +<span id="L24" class="LineNr">24 </span> <span class="Comment"># push argv[2]</span> +<span id="L25" class="LineNr">25 </span> ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EBP+12)</span> +<span id="L26" class="LineNr">26 </span> <span class="Comment"># push argv[1]</span> +<span id="L27" class="LineNr">27 </span> ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0x8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EBP+8)</span> +<span id="L28" class="LineNr">28 </span> <span class="Comment"># call</span> +<span id="L29" class="LineNr">29 </span> e8/call argv_equal/disp32 +<span id="L30" class="LineNr">30 </span> <span class="Comment"># exit(EAX)</span> +<span id="L31" class="LineNr">31 </span>$exit: +<span id="L32" class="LineNr">32 </span> 89/copy 3/mod/direct 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy EAX to EBX</span> +<span id="L33" class="LineNr">33 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/imm32 <span class="Comment"># copy to EAX</span> +<span id="L34" class="LineNr">34 </span> cd/syscall 0x80/imm8 +<span id="L35" class="LineNr">35 </span> +<span id="L36" class="LineNr">36 </span><span class="Comment"># compare two null-terminated ascii strings</span> +<span id="L37" class="LineNr">37 </span><span class="Comment"># reason for the name: the only place we should have null-terminated ascii strings is from commandline args</span> +<span id="L38" class="LineNr">38 </span>argv_equal: <span class="Comment"># (s1, s2) : null-terminated ascii strings -> EAX : boolean</span> +<span id="L39" class="LineNr">39 </span> <span class="Comment"># initialize s1 (ECX) and s2 (EDX)</span> +<span id="L40" class="LineNr">40 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 1/r32/ECX 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+4) to ECX</span> +<span id="L41" class="LineNr">41 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 2/r32/EDX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+8) to EDX</span> +<span id="L42" class="LineNr">42 </span> <span class="Comment"># while (true)</span> +<span id="L43" class="LineNr">43 </span>$argv_loop: +<span id="L44" class="LineNr">44 </span> <span class="Comment"># c1/EAX, c2/EBX = *s1, *s2</span> +<span id="L45" class="LineNr">45 </span> b8/copy 0/imm32 <span class="Comment"># clear EAX</span> +<span id="L46" class="LineNr">46 </span> 8a/copy 0/mod/indirect 1/rm32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *ECX to lower byte of EAX</span> +<span id="L47" class="LineNr">47 </span> bb/copy 0/imm32 <span class="Comment"># clear EBX</span> +<span id="L48" class="LineNr">48 </span> 8a/copy 0/mod/indirect 2/rm32/EDX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *EDX to lower byte of EBX</span> +<span id="L49" class="LineNr">49 </span> <span class="Comment"># if (c1 == 0) break</span> +<span id="L50" class="LineNr">50 </span> 3d/compare-EAX 0/imm32 +<span id="L51" class="LineNr">51 </span> 74/jump-if-equal $argv_break/disp8 +<span id="L52" class="LineNr">52 </span> <span class="Comment"># if (c1 != c2) return false</span> +<span id="L53" class="LineNr">53 </span> 39/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare EAX with EBX</span> +<span id="L54" class="LineNr">54 </span> 75/jump-if-not-equal $argv_fail/disp8 +<span id="L55" class="LineNr">55 </span> <span class="Comment"># ++s1, ++s2</span> +<span id="L56" class="LineNr">56 </span> 41/inc-ECX +<span id="L57" class="LineNr">57 </span> 42/inc-EDX +<span id="L58" class="LineNr">58 </span> <span class="Comment"># end while</span> +<span id="L59" class="LineNr">59 </span> eb/jump $argv_loop/disp8 +<span id="L60" class="LineNr">60 </span>$argv_break: +<span id="L61" class="LineNr">61 </span> <span class="Comment"># if (c2 == 0) return true</span> +<span id="L62" class="LineNr">62 </span> 81 7/subop/compare 3/mod/direct 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># compare EBX</span> +<span id="L63" class="LineNr">63 </span> 75/jump-if-not-equal $argv_fail/disp8 +<span id="L64" class="LineNr">64 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/imm32 <span class="Comment"># copy to EAX</span> +<span id="L65" class="LineNr">65 </span> c3/return +<span id="L66" class="LineNr">66 </span> <span class="Comment"># return false</span> +<span id="L67" class="LineNr">67 </span>$argv_fail: +<span id="L68" class="LineNr">68 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># copy to EAX</span> +<span id="L69" class="LineNr">69 </span> c3/return </pre> </body> </html> |