76 lines
2.5 KiB
Scheme
76 lines
2.5 KiB
Scheme
;;; -*-scheme-*-
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;;; Mes --- Maxwell Equations of Software
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;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of Mes.
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;;;
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;;; Mes is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; Mes is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Mes. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; libc-i386.mes defines C library routines
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;;; Code:
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(define (i386:puts data length)
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`(
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#xba ,@(int->bv32 length) ;; mov $0xe,%edx
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#xb9 ,@(int->bv32 data) ;; mov $data,%ecx
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#xbb #x01 #x00 #x00 #x00 ;; mov $0x1,%ebx
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#xb8 #x04 #x00 #x00 #x00 ;; mov $0x4,%eax
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#xcd #x80 ;; int $0x80
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))
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(define (i386:exit code)
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`(
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#xbb ,@(int->bv32 code) ;; mov $code,%ebx
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#xb8 #x01 #x00 #x00 #x00 ;; mov $0x1,%eax
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#xcd #x80 ;; int $0x80
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))
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(define (i386:for start test step statement)
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`(
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;; b:
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#x89 #xe5 ;; mov %esp,%ebp
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;;21:
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#xc7 #x45 #xf4 ,@(int->bv32 start) ;; movl $start,-0xc(%ebp)
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;;28:
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#xeb ,(+ (length statement) 9) ;;x14 jmp 3e <main+0x3e>
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;;2a:
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;;#x83 #xec #x0c ;; sub $0xc,%esp
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;; 9:
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#x55 ;; push %ebp
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,@statement
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#x5d ;; pop %ebp
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;;2d:
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;;;;;;#x68 #x09 #x00 #x00 #x00 ;; push $0x9
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;;32:
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;;;;;;#xe8 #xfc #xff #xff #xff ;; call 33 <main+0x33>
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;;37:
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;;;;;;#x83 #xc4 #x10 ;; add $0x10,%esp
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;;3a:
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;;;;#x83 #x45 #xf4 ,step ;; addl $step,-0xc(%ebp)
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;;3e:
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;;;;#x83 #x7d #xf4 ,test ;; cmpl $test,-0xc(%ebp)
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#x81 #x45 #xf4 ,@(int->bv32 step) ;;addl $step,-0xc(%ebp)
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#x81 #x7d #xf4 ,@(int->bv32 test) ;;cmpl $0x7cff,-0xc(%ebp)
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;;42:
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;;;#x7e ,(- 0 (length statement) 18) ;;#xe6 ;; jle 2a <main+0x2a>
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#x75 ,(- 0 (length statement) 18) ;;#xe6 ;; jne 2a <main+0x2a>
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))
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