From d1c9392a5461e0d33e226375a8f7986a97d2d66b Mon Sep 17 00:00:00 2001 From: Kartik Agaram Date: Mon, 26 Nov 2018 01:19:47 -0800 Subject: 4782 --- html/subx/examples/ex8.subx.html | 75 ++++++++++++++++++++-------------------- 1 file changed, 38 insertions(+), 37 deletions(-) (limited to 'html/subx/examples/ex8.subx.html') diff --git a/html/subx/examples/ex8.subx.html b/html/subx/examples/ex8.subx.html index f0770c2f..f1868a61 100644 --- a/html/subx/examples/ex8.subx.html +++ b/html/subx/examples/ex8.subx.html @@ -74,43 +74,44 @@ if ('onhashchange' in window) { 18 # instruction effective address operand displacement immediate 19 # op subop mod rm32 base index scale r32 20 # 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 -21 # prolog -22 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP -23 # call ascii-length(argv[1]) -24 # push args -25 ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0x8/disp8 . # push *(EBP+8) -26 # call -27 e8/call ascii-length/disp32 -28 # discard args -29 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP -30 -31 # exit(EAX) -32 89/copy 3/mod/direct 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to EBX -33 b8/copy-to-EAX 1/imm32/exit -34 cd/syscall 0x80/imm8 -35 -36 ascii-length: # (s) -37 # initialize s (EDX) -38 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none . 2/r32/EDX 4/disp8 . # copy *(ESP+4) to EDX -39 # var result = 0 (EAX) -40 b8/copy-to-EAX 0/imm32 -41 $ascii-length-loop: -42 # var c = *s (ECX) -43 8a/copy 0/mod/* 2/rm32/EDX . . . 1/r32/ECX . . # copy byte at *EDX to lower byte of ECX -44 # if c == '\0' break -45 81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0/imm32 # compare ECX -46 74/jump-if-equal $ascii-length-ret/disp8 -47 # ++s -48 81 0/subop/add 3/mod/direct 2/rm32/EDX . . . . . 1/imm32 # add to EDX -49 # ++result -50 40/inc-EAX -51 # loop -52 eb/jump $ascii-length-loop/disp8 -53 $ascii-length-ret: -54 # return (result in EAX) -55 c3/return -56 -57 # vim:nowrap:textwidth=0 +21 +22 # prolog +23 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP +24 # call ascii-length(argv[1]) +25 # push args +26 ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0x8/disp8 . # push *(EBP+8) +27 # call +28 e8/call ascii-length/disp32 +29 # discard args +30 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP +31 +32 # exit(EAX) +33 89/copy 3/mod/direct 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to EBX +34 b8/copy-to-EAX 1/imm32/exit +35 cd/syscall 0x80/imm8 +36 +37 ascii-length: # (s) +38 # initialize s (EDX) +39 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none . 2/r32/EDX 4/disp8 . # copy *(ESP+4) to EDX +40 # var result = 0 (EAX) +41 b8/copy-to-EAX 0/imm32 +42 $ascii-length-loop: +43 # var c = *s (ECX) +44 8a/copy 0/mod/* 2/rm32/EDX . . . 1/r32/ECX . . # copy byte at *EDX to lower byte of ECX +45 # if c == '\0' break +46 81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0/imm32 # compare ECX +47 74/jump-if-equal $ascii-length-ret/disp8 +48 # ++s +49 81 0/subop/add 3/mod/direct 2/rm32/EDX . . . . . 1/imm32 # add to EDX +50 # ++result +51 40/inc-EAX +52 # loop +53 eb/jump $ascii-length-loop/disp8 +54 $ascii-length-ret: +55 # return (result in EAX) +56 c3/return +57 +58 # vim:nowrap:textwidth=0 -- cgit 1.4.1-2-gfad0