This file is indexed.

/usr/lib/gambc4/_eval#.scm is in libgambc4 4.2.8-1.1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
;;;============================================================================

;;; File: "_eval#.scm", Time-stamp: <2007-05-27 22:22:01 feeley>

;;; Copyright (c) 1994-2007 by Marc Feeley, All Rights Reserved.

;;;============================================================================

;;; Representation of exceptions.

(define-library-type-of-exception expression-parsing-exception
  id: 5279db3c-9e07-4e8c-913f-29a7d61ee626
  constructor: #f
  opaque:

  (kind       unprintable: read-only:)
  (source     unprintable: read-only:)
  (parameters unprintable: read-only:)
)

(define-library-type-of-exception unbound-global-exception
  id: 2cea29df-7f3e-489d-bf83-5925c5081151
  constructor: #f
  opaque:

  (code     unprintable: read-only:)
  (rte      unprintable: read-only:)
  (variable unprintable: read-only:)
)

;;;----------------------------------------------------------------------------

;;; Miscellaneous macros.

(##define-macro (macro-true? x) x)
(##define-macro (macro-unbound? x) `(##unbound? ,x))

(##define-macro (macro-self-var)     ''##self)
(##define-macro (macro-selector-var) ''##selector)
(##define-macro (macro-do-loop-var)  ''##do-loop)

;;;----------------------------------------------------------------------------

;;; Macros to manipulate nodes of executable code.

(##define-macro (macro-make-code code-prc cte src stepper subcodes . lst)
  `(let (($code (##vector #f ,code-prc ,cte ,src ,stepper ,@subcodes ,@lst)))
     ,@(let loop ((l subcodes) (i 5) (r '()))
         (if (pair? l)
           (loop (cdr l)
                 (+ i 1)
                 (cons `(##vector-set! (##vector-ref $code ,i) 0 $code) r))
           (reverse r)))
     $code))

(##define-macro (macro-code-link c)
  `(##vector-ref ,c 0))

(##define-macro (macro-code-cprc c)
  `(##vector-ref ,c 1))

(##define-macro (macro-code-cte c)
  `(##vector-ref ,c 2))

(##define-macro (macro-code-locat c)
  `(##vector-ref ,c 3))

(##define-macro (macro-code-locat-set! c l)
  `(##vector-set! ,c 3 ,l))

(##define-macro (macro-code-stepper c)
  `(##vector-ref ,c 4))

(##define-macro (macro-code-length c)
  `(##fixnum.- (##vector-length ,c) 5))

(##define-macro (macro-code-ref c n)
  `(##vector-ref ,c (##fixnum.+ ,n 5)))

(##define-macro (macro-code-set! c n x)
  `(##vector-set! ,c (##fixnum.+ ,n 5) ,x))

(##define-macro (^ n)
  `(##vector-ref $code ,(+ n 5)))

(##define-macro (macro-is-child-code? child parent)
  `(let ((child ,child)
         (parent ,parent))
     (and (##vector? child)
          (##fixnum.< 3 (##vector-length child))
          (##eq? (macro-code-link child) parent))))

(##define-macro (macro-code-run c)
  `(let (($$code ,c))
     ((##vector-ref $$code 1) $$code rte)))

;;;----------------------------------------------------------------------------

;;; Macros to create the "code procedure" associated with a code node.

(##define-macro (macro-make-cprc . body)
  `(let ()
     (##declare (not inline) (not interrupts-enabled) (environment-map))
     (lambda ($code rte)
       (let (($$continue
              (lambda ($code rte)
                (##declare (inline))
                ,@body)))
         (##declare (interrupts-enabled))
         ($$continue $code rte)))))

(##define-macro (macro-make-gen params . def)
  `(let ()
     (##declare (not inline))
     (lambda (cte tail? src ,@params) ,@def)))

(##define-macro (macro-gen proc src . args)
  `(,proc cte tail? ,src ,@args))

;;;----------------------------------------------------------------------------

;;; Macros for single stepping.

(##define-macro (macro-call-step! vars . body)
  `(macro-step! #t 1 ,vars ,@body))

(##define-macro (macro-future-step! vars . body)
  `(macro-step! #f 2 ,vars ,@body))

(##define-macro (macro-delay-step! vars . body)
  `(macro-step! #f 2 ,vars ,@body))

(##define-macro (macro-lambda-step! vars . body)
  `(macro-step! #f 3 ,vars ,@body))

(##define-macro (macro-define-step! vars . body)
  `(macro-step! #f 4 ,vars ,@body))

(##define-macro (macro-set!-step! vars . body)
  `(macro-step! #f 5 ,vars ,@body))

(##define-macro (macro-reference-step! vars . body)
  `(macro-step! #f 6 ,vars ,@body))

(##define-macro (macro-constant-step! vars . body)
  `(macro-step! #f 7 ,vars ,@body))

(##define-macro (macro-make-no-stepper)
  ''#(#(#f #f #f #f #f #f #f) #f #f #f #f #f #f #f))

(##define-macro (macro-make-step-handlers)
  '(##vector ##step-handler
             ##step-handler
             ##step-handler
             ##step-handler
             ##step-handler
             ##step-handler
             ##step-handler))

(##define-macro (macro-make-main-stepper)
  '(##vector (##vector-copy ##step-handlers)
             #f
             #f
             #f
             #f
             #f
             #f
             #f))

(##define-macro (macro-step! leapable? handler-index vars . body)
  `(let* (($$execute-body
           (lambda ($code rte ,@vars) ,@body))
          ($$handler
           (##vector-ref (macro-code-stepper $code) ,handler-index)))
     (if $$handler
       ($$handler ,leapable?
                  $code
                  rte
                  (lambda ($code rte ,@vars)
                    ($$execute-body $code rte ,@vars))
                  ,@vars)
       ($$execute-body $code rte ,@vars))))

;;;----------------------------------------------------------------------------

;;; Macros to manipulate the runtime environment

(##define-macro (macro-make-rte rte . lst)
  `(##vector ,rte ,@lst))

(##define-macro (macro-make-rte* rte ns)
  `(let (($rte (##make-vector (##fixnum.+ ,ns 1) '#!unbound)))
     (##vector-set! $rte 0 ,rte)
     $rte))

(##define-macro (macro-rte-up rte)         `(##vector-ref ,rte 0))
(##define-macro (macro-rte-ref rte i)      `(##vector-ref ,rte ,i))
(##define-macro (macro-rte-set! rte i val) `(##vector-set! ,rte ,i ,val))

;;;----------------------------------------------------------------------------

(##define-macro (define-runtime-macro pattern . rest)

  (define (form-size parms) ;; this definition must match the one in "_eval.scm"
    (let loop ((lst parms) (n 1))
      (cond ((pair? lst)
             (let ((parm (car lst)))
               (if (memq parm '(#!optional #!key #!rest))
                 (- n)
                 (loop (cdr lst)
                       (+ n 1)))))
            ((null? lst)
             n)
            (else
             (- n)))))

  (let ((src `(lambda ,(cdr pattern) ,@rest)));;;;;;;; lambda --> ##lambda
    `(##top-cte-add-macro!
      ##interaction-cte
      ',(car pattern)
      (##make-macro-descr
       #f
       ',(form-size (cdr pattern))
       ,src
       #f))))

(##define-macro (define-runtime-syntax name expander)
  `(##top-cte-add-macro!
    ##interaction-cte
    ',name
    (##make-macro-descr
     #t
     -1
     ,expander
     #f)))

;;;============================================================================