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
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
|
/* -*-c-*- -------------- mix_code_file.c :
* Implementation of the functions declared in mix_code_file.h
* ------------------------------------------------------------------
* $Id: mix_code_file.c,v 1.5 2003/06/04 01:33:24 jao Exp $
* ------------------------------------------------------------------
* Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <string.h>
#include "mix.h"
#include "xmix_io.h"
#include "mix_code_file.h"
/* mix_code_file_t type */
static const gint32 SIGNATURE_ = 0xDEADBEEF; /* release files */
static const gint32 SIGNATURE_D_ = 0xBEEFDEAD; /* debug files */
#define IS_DEBUG_(file) ((file)->header.signature == SIGNATURE_D_)
#define IS_RELEASE_(file) ((file)->header.signature == SIGNATURE_)
typedef struct mix_cfheader_t mix_cfheader_t;
struct mix_cfheader_t
{
gint32 signature;
gint mj_ver;
gint mn_ver;
gint16 start;
size_t path_len;
};
struct mix_code_file_t
{
mix_file_t *file; /* the underlying disk file */
mix_address_t address; /* current address while reading */
mix_cfheader_t header; /* file header */
gchar *source_path; /* variable length part of the header*/
mix_symbol_table_t *symbol_table; /* code files with debug info fill it*/
};
#define to_io_(cf) MIX_IOCHANNEL (cf->file)
/* Code files are lists of tagged words. A MIX_INS_TAG_ denotes
* that the word is an instruction, whose address is the next to
* the previous instruction's one, while a MIX_ADDR_TAG_ indicates
* that the word is a new address origin for the next instructions.
* The tags are stored as bit patterns in bit 31 of the mix word.
*/
#define MIX_ADDR_TAG_ (MIX_WORD_SIGN_BIT<<1)
#define is_ins_(word) (((word)&MIX_ADDR_TAG_) == MIX_WORD_ZERO)
#define is_addr_(word) (((word)&MIX_ADDR_TAG_) == MIX_ADDR_TAG_)
#define tag_ins_(word) (word)
#define tag_addr_(word) ((word)|MIX_ADDR_TAG_)
#define extract_ins_(tagged) (tagged)
#define extract_addr_(tagged) ((tagged)&MIX_SHORT_MAX)
/* mix code files have a default extension (.mix) which is customizable */
static const gchar *DEFEXT_ = NULL;
const gchar *
mix_code_file_get_defext (void)
{
return DEFEXT_;
}
gboolean
mix_code_file_set_defext (const gchar *ext)
{
if (DEFEXT_ != NULL) g_free ((void *)DEFEXT_);
DEFEXT_ = (ext != NULL)? g_strdup (ext):NULL;
return (DEFEXT_ != NULL || ext == NULL);
}
/* create/destroy code files for read or write */
static mix_code_file_t *
mix_code_file_new_ (const gchar *name, mix_fmode_t mode)
{
mix_code_file_t *result = g_new (mix_code_file_t, 1);
if ( result != NULL )
{
result->file = mix_file_new_with_def_ext (name, mode, DEFEXT_);
result->address = MIX_SHORT_ZERO;
result->source_path = NULL;
result->symbol_table = NULL;
}
if ( result != NULL && result->file == NULL )
{
g_free (result);
result = NULL;
}
return result;
}
mix_code_file_t *
mix_code_file_new_read (const gchar *name)
{
mix_code_file_t *result = mix_code_file_new_ (name, mix_io_READ);
mix_cfheader_t *header;
FILE *file;
gboolean check;
if ( result == NULL )
return NULL;
file = mix_file_to_FILE (result->file);
header = &(result->header);
check = fread (header, sizeof (mix_cfheader_t), 1, file)
&& (IS_RELEASE_ (result) || IS_DEBUG_ (result));
if ( check )
{
gint major, minor;
sscanf (VERSION, "%d.%d", &major, &minor);
check = header->mj_ver == major && header->mn_ver <= minor;
}
if ( check )
{/* get source path */
result->source_path = g_strnfill (1 + header->path_len, '\0');
check = result->source_path != NULL
&& fgets (result->source_path, 1 + header->path_len, file) != NULL;
}
if ( check && IS_DEBUG_ (result) )
{/* read symbol table */
result->symbol_table = mix_symbol_table_new_from_file (file);
check = result->symbol_table != NULL;
}
if ( !check )
{
mix_code_file_delete (result);
return NULL;
}
return result;
}
mix_code_file_t *
mix_code_file_new_write(const gchar *name, mix_address_t addr,
const gchar *source_path, gboolean debug,
const mix_symbol_table_t *table)
{
mix_code_file_t *result;
FILE *file;
gboolean check;
result = mix_code_file_new_ (name, mix_io_WRITE);
if ( result == NULL || ( file = mix_file_to_FILE (result->file) ) == NULL )
return NULL;
else if ( source_path != NULL )
{
result->source_path = g_strdup (source_path/*, MAX_PATH_LEN_*/);
if ( result->source_path == NULL )
{
mix_code_file_delete (result);
return NULL;
}
}
else
result->source_path = NULL;
result->header.signature = debug? SIGNATURE_D_:SIGNATURE_;
sscanf (VERSION, "%d.%d", &result->header.mj_ver, &result->header.mn_ver);
result->header.start = (gint16) addr;
result->header.path_len = strlen (result->source_path);
check = write_data_ (to_io_ (result), &result->header, 1);
if ( check && result->source_path != NULL )
check = fputs (result->source_path, file) != EOF;
if ( check && debug )
mix_symbol_table_print (table, MIX_SYM_LINE, file, TRUE);
if ( !check )
{
mix_code_file_delete (result);
return NULL;
}
return result;
}
void
mix_code_file_delete (mix_code_file_t *file)
{
g_return_if_fail (file != NULL);
mix_file_delete (file->file);
if (file->source_path) g_free (file->source_path);
g_free (file);
}
/* get general parameters from a code file */
gboolean
mix_code_file_is_debug (const mix_code_file_t *file)
{
return (file != NULL) && IS_DEBUG_ (file);
}
gint
mix_code_file_major_version (const mix_code_file_t *file)
{
g_return_val_if_fail (file != NULL, 0);
return file->header.mj_ver;
}
gint
mix_code_file_minor_version (const mix_code_file_t *file)
{
g_return_val_if_fail (file != NULL, 0);
return file->header.mn_ver;
}
mix_address_t
mix_code_file_get_start_addr (const mix_code_file_t *file)
{
g_return_val_if_fail (file != NULL, MIX_SHORT_ZERO);
return mix_short_new (file->header.start);
}
mix_symbol_table_t *
mix_code_file_get_symbol_table(mix_code_file_t *file)
{
mix_symbol_table_t *result = NULL;
g_return_val_if_fail (file != NULL, NULL);
result = file->symbol_table;
file->symbol_table = NULL;
return result;
}
/* read instructions from a code file */
gboolean
mix_code_file_is_eof (mix_code_file_t *file)
{
return is_eof_ (to_io_ (file));
}
gboolean
mix_code_file_get_ins (mix_code_file_t *file, mix_ins_desc_t *desc)
{
mix_word_t next;
g_return_val_if_fail (file != NULL, FALSE);
g_return_val_if_fail (desc != NULL, FALSE);
while (TRUE)
{
if ( ! mix_io_read_word_array (to_io_ (file), &next, 1) ) return FALSE;
if ( is_addr_ (next) )
file->address = extract_addr_ (next);
else if ( is_ins_ (next) )
{
desc->ins = extract_ins_ (next);
desc->address = (file->address)++;
if ( IS_DEBUG_ (file) )
{
mix_short_t lineno;
if ( !mix_io_read_short_array (to_io_ (file), &lineno, 1) )
return FALSE;
desc->lineno = mix_short_magnitude (lineno);
}
else
desc->lineno = 0;
return TRUE;
}
else
{
g_assert_not_reached ();
return FALSE;
}
};
}
/* Write instructions to a code file */
gboolean
mix_code_file_write_ins (mix_code_file_t *file, const mix_ins_desc_t *desc)
{
g_return_val_if_fail (desc != NULL, FALSE);
return ( mix_code_file_set_address (file, desc->address) &&
mix_code_file_write_next_ins (file, desc->ins, desc->lineno) );
}
gboolean
mix_code_file_write_next_ins (mix_code_file_t *file, mix_word_t ins,
guint lineno)
{
g_return_val_if_fail (file != NULL, FALSE);
if ( mix_io_write_word (to_io_ (file), tag_ins_ (ins))
&& ( IS_RELEASE_ (file)
|| mix_io_write_short (to_io_ (file), mix_short_new (lineno)) )
)
{
++(file->address);
return TRUE;
}
else
return FALSE;
}
gboolean
mix_code_file_set_address (mix_code_file_t *file, mix_address_t address)
{
g_return_val_if_fail(file != NULL, FALSE);
if ( file->address != address ) {
if ( !mix_io_write_word (to_io_ (file),
tag_addr_ (mix_short_to_word_fast (address))) )
return FALSE;
file->address = address;
}
return TRUE;
}
/* get details about the source file */
const gchar *
mix_code_file_get_source_path (const mix_code_file_t *file)
{
g_return_val_if_fail (file != NULL, NULL);
return file->source_path;
}
|