3 ;;; Mes --- Maxwell Equations of Software
4 ;;; Copyright © 2017 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;; This file is part of Mes.
8 ;;; Mes is free software; you can redistribute it and/or modify it
9 ;;; under the terms of the GNU General Public License as published by
10 ;;; the Free Software Foundation; either version 3 of the License, or (at
11 ;;; your option) any later version.
13 ;;; Mes is distributed in the hope that it will be useful, but
14 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;;; GNU General Public License for more details.
18 ;;; You should have received a copy of the GNU General Public License
19 ;;; along with Mes. If not, see <http://www.gnu.org/licenses/>.
23 ;;; M1.mes produces stage0' M1 object format
30 (mes-use-module (srfi srfi-1))
31 (mes-use-module (srfi srfi-26))
32 (mes-use-module (mes as))
33 (mes-use-module (mes elf))
34 (mes-use-module (mes optargs))
35 (mes-use-module (mes pmatch))
36 (mes-use-module (language c99 info))))
38 (define (logf port string . rest)
39 (apply format (cons* port string rest))
43 (define (stderr string . rest)
44 (apply logf (cons* (current-error-port) string rest)))
46 (define (objects->M1 objects)
47 ((compose object->M1 merge-objects) objects))
49 (define (object->elf o)
50 ((compose M1->elf object->M1) o))
52 (define (objects->elf objects)
53 ((compose M1->elf object->M1 merge-objects) objects))
55 (define (merge-objects objects)
56 (let loop ((objects (cdr objects)) (object (car objects)))
57 (if (null? objects) object
59 `((functions . ,(alist-add (assoc-ref object 'functions) (assoc-ref (car objects) 'functions)))
60 (globals . ,(alist-add (assoc-ref object 'globals) (assoc-ref (car objects) 'globals))))))))
62 (define (alist-add a b)
63 (let* ((b-keys (map car b))
64 (a (filter (lambda (f) (or (cdr f) (not (member (car f) b-keys)))) a))
66 (append a (filter (lambda (e) (not (member (car e) a-keys))) b))))
68 (define (hex2:address o)
69 (string-append "&" o))
71 (define (hex2:offset o)
72 (string-append "%" o))
74 (define (hex2:offset1 o)
75 (string-append "!" o))
79 (define (hex2:immediate o)
80 (if hex? (string-append "%0x" (dec->hex o))
83 (define (hex2:immediate1 o)
84 (if hex? (string-append "!0x" (dec->hex o))
87 (define (object->M1 o)
88 (let* ((functions (assoc-ref o 'functions))
89 (function-names (map car functions))
90 (globals (assoc-ref o 'globals))
91 (global-names (map car globals))
92 (strings (filter (lambda (g) (and (pair? g) (eq? (car g) #:string))) global-names)))
93 (define (string->label o)
94 (let ((index (list-index (lambda (s) (equal? s o)) strings)))
95 (format #f "string_~a" index)))
99 ((#:address (#:string ,string)) (hex2:address (string->label `(#:string ,string))))
100 ((#:string (#:address ,address)) (hex2:address address))
101 ((#:address (#:address ,address)) (hex2:address address))
103 ((#:string ,string) (hex2:address (string->label o)))
104 ((#:address ,address) (hex2:address address))
105 ((#:offset ,offset) (hex2:offset offset))
106 ((#:offset1 ,offset1) (hex2:offset1 offset1))
107 ((#:immediate ,immediate) (hex2:immediate immediate))
108 ((#:immediate1 ,immediate1) (hex2:immediate1 immediate1))
109 (_ (cond ((char? o) (text->M1 (char->integer o)))
110 ((string? o) (format #f "~a" o))
111 ((number? o) (let ((o (if (< o #x80) o (- o #x100))))
112 (if hex? (string-append "!0x"
113 (if (and (>= o 0) (< o 16)) "0" "")
114 (number->string o 16))
115 (string-append "!" (number->string o)))))
116 (else (format #f "~a" o))))))
117 (define (write-function o)
121 (cond ((eq? (car o) #:label)
122 (format #t ":~a" (cadr o)))
123 ((eq? (car o) #:comment)
124 (format #t "\t\t\t\t\t# ~a" (cadr o)))
125 ((or (string? (car o)) (symbol? (car o)))
126 (format #t "\t~a" (string-join (map text->M1 o) " ")))
127 (else (error "line->M1 invalid line:" o)))
129 (format #t "\n\n:~a\n" name)
130 (for-each line->M1 (apply append text))))
131 (define (write-global o)
133 (if (not (string? o)) o
135 (function? (member label function-names))
136 (string-label (string->label label))
137 (string? (not (equal? string-label "string_#f")))
138 (global? (member label global-names)))
139 (if (or global? string?) (format #f "&~a" label)
140 (begin (if (not function?) (stderr "warning: unresolved label: ~s\n" label))
141 (format #f "&~a" label))))))
142 (let* ((label (if (not (and (pair? (car o)) (eq? (caar o) #:string))) (car o)
143 (string->label (car o))))
145 (data (filter-map labelize data))
147 (string-max (or (and=> (getenv "M1_STRING_MAX") string->number) 0)))
148 (format #t "\n:~a\n" label)
149 (cond ((and (< len string-max)
151 (eq? (last data) #\nul)
152 (not (find (cut memq <> '(#\nul #\backspace #\return #\" #\')) (list-head data (1- (length data))))))
153 (format #t "\"~a\"" (list->string (list-head data (1- (length data))))))
154 (else (format #t "~a" (string-join (map text->M1 data) " "))))
156 (display "\n:HEX2_text")
157 (for-each write-function (filter cdr functions))
158 (display "\n\n:ELF_data\n") ;; FIXME
159 (display "\n\n:HEX2_data\n")
160 (for-each write-global globals)))