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
|
/**********************************************************************
* pflabel.c
* Label resolution logic
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**********************************************************************/
/**********************************************************************
* Included Files
**********************************************************************/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "keywords.h"
#include "pdefs.h"
#include "pedefs.h"
#include "perr.h"
#include "poff.h"
/**********************************************************************
* Pre-processor Definitions
**********************************************************************/
#define INITIAL_DEFINED_ALLOCATION (1024*sizeof(optDefinedLabelRef_t))
#define DEFINED_INCREMENT (256*sizeof(optDefinedLabelRef_t))
#define INITIAL_UNDEFINED_ALLOCATION (1024*sizeof(optUndefinedLabelRef_t))
#define UNDEFINED_INCREMENT (256*sizeof(optUndefinedLabelRef_t))
/**********************************************************************
* Private Types
**********************************************************************/
struct optDefinedLabelRef_s
{
uint32_t label;
uint32_t pc;
};
typedef struct optDefinedLabelRef_s optDefinedLabelRef_t;
struct optUndefinedLabelRef_s
{
uint32_t label;
uint32_t symIndex;
};
typedef struct optUndefinedLabelRef_s optUndefinedLabelRef_t;
/**********************************************************************
* Private Data
**********************************************************************/
static optDefinedLabelRef_t *definedLabelRefs = NULL;
static uint32_t definedLabelRefAlloc = 0;
static uint32_t nDefinedLabelRefs = 0;
static optUndefinedLabelRef_t *undefinedLabelRefs = NULL;
static uint32_t undefinedLabelRefAlloc = 0;
static uint32_t nUndefinedLabelRefs = 0;
/**********************************************************************
* Private Function Prototypes
**********************************************************************/
/**********************************************************************
* Private Inline Functions
**********************************************************************/
/**********************************************************************
* Private Functions
**********************************************************************/
/**********************************************************************/
static void poffCheckDefinedLabelAlloc(void)
{
/* Has the label reference table been allocated */
if (!definedLabelRefs)
{
/* No, allocate it now */
definedLabelRefs = (optDefinedLabelRef_t*)
malloc(INITIAL_DEFINED_ALLOCATION);
if (!definedLabelRefs)
{
fatal(eNOMEMORY);
}
definedLabelRefAlloc = INITIAL_DEFINED_ALLOCATION;
}
}
/**********************************************************************/
static void poffCheckDefinedLabelRealloc(void)
{
/* Check if there is room for the new data */
if (((nDefinedLabelRefs + 1)*sizeof(optDefinedLabelRef_t)) >
definedLabelRefAlloc)
{
uint32_t newAlloc = definedLabelRefAlloc + DEFINED_INCREMENT;
void *tmp;
/* Reallocate the label reference tabel */
tmp = realloc(definedLabelRefs, newAlloc);
if (!tmp)
{
fatal(eNOMEMORY);
}
/* And set the new size */
definedLabelRefAlloc = newAlloc;
definedLabelRefs = (optDefinedLabelRef_t*)tmp;
}
}
/**********************************************************************/
static void poffCheckUndefinedLabelAlloc(void)
{
/* Has the label reference table been allocated */
if (!undefinedLabelRefs)
{
/* No, allocate it now */
undefinedLabelRefs = (optUndefinedLabelRef_t*)
malloc(INITIAL_UNDEFINED_ALLOCATION);
if (!undefinedLabelRefs)
{
fatal(eNOMEMORY);
}
undefinedLabelRefAlloc = INITIAL_UNDEFINED_ALLOCATION;
}
}
/**********************************************************************/
static void poffCheckUndefinedLabelRealloc(void)
{
/* Check if there is room for the new data */
if (((nUndefinedLabelRefs + 1)*sizeof(optUndefinedLabelRef_t)) >
undefinedLabelRefAlloc)
{
uint32_t newAlloc = undefinedLabelRefAlloc + UNDEFINED_INCREMENT;
void *tmp;
/* Reallocate the label reference tabel */
tmp = realloc(undefinedLabelRefs, newAlloc);
if (!tmp)
{
fatal(eNOMEMORY);
}
/* And set the new size */
undefinedLabelRefAlloc = newAlloc;
undefinedLabelRefs = (optUndefinedLabelRef_t*)tmp;
}
}
/**********************************************************************/
/**********************************************************************
* Global Functions
**********************************************************************/
/**********************************************************************/
void poffAddToDefinedLabelTable(uint32_t label, uint32_t pc)
{
/* Make sure we have memory to do this. If not, we will crash */
poffCheckDefinedLabelAlloc();
poffCheckDefinedLabelRealloc();
/* Add the label to the table */
definedLabelRefs[nDefinedLabelRefs].label = label;
definedLabelRefs[nDefinedLabelRefs].pc = pc;
nDefinedLabelRefs++;
}
/**********************************************************************/
void poffAddToUndefinedLabelTable(uint32_t label, uint32_t symIndex)
{
/* Make sure we have memory to do this. If not, we will crash */
poffCheckUndefinedLabelAlloc();
poffCheckUndefinedLabelRealloc();
/* Add the label to the table */
undefinedLabelRefs[nUndefinedLabelRefs].label = label;
undefinedLabelRefs[nUndefinedLabelRefs].symIndex = symIndex;
nUndefinedLabelRefs++;
}
/**********************************************************************/
int poffGetSymIndexForUndefinedLabel(uint32_t label)
{
int i;
for (i = 0; i < nUndefinedLabelRefs; i++)
{
if (undefinedLabelRefs[i].label == label)
{
return undefinedLabelRefs[i].symIndex;
}
}
return -1;
}
/**********************************************************************/
int poffGetPcForDefinedLabel(uint32_t label)
{
int i;
for (i = 0; i < nDefinedLabelRefs; i++)
{
if (definedLabelRefs[i].label == label)
{
return definedLabelRefs[i].pc;
}
}
return -1;
}
/**********************************************************************/
void poffReleaseLabelReferences(void)
{
if (definedLabelRefs)
{
free(definedLabelRefs);
}
if (undefinedLabelRefs)
{
free(undefinedLabelRefs);
}
}
/**********************************************************************/
|
