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
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
|
/* libdeps plugin for the GNU linker.
Copyright (C) 2020 Free Software Foundation, Inc.
This file is part of the GNU Binutils.
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#if BFD_SUPPORTS_PLUGINS
#include "plugin-api.h"
#include <ctype.h> /* For isspace. */
extern enum ld_plugin_status onload (struct ld_plugin_tv *tv);
/* Helper for calling plugin api message function. */
#define TV_MESSAGE if (tv_message) (*tv_message)
/* Function pointers to cache hooks passed at onload time. */
static ld_plugin_register_claim_file tv_register_claim_file = 0;
static ld_plugin_register_all_symbols_read tv_register_all_symbols_read = 0;
static ld_plugin_register_cleanup tv_register_cleanup = 0;
static ld_plugin_message tv_message = 0;
static ld_plugin_add_input_library tv_add_input_library = 0;
static ld_plugin_set_extra_library_path tv_set_extra_library_path = 0;
/* Handle/record information received in a transfer vector entry. */
static enum ld_plugin_status
parse_tv_tag (struct ld_plugin_tv *tv)
{
#define SETVAR(x) x = tv->tv_u.x
switch (tv->tv_tag)
{
case LDPT_REGISTER_CLAIM_FILE_HOOK:
SETVAR(tv_register_claim_file);
break;
case LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK:
SETVAR(tv_register_all_symbols_read);
break;
case LDPT_REGISTER_CLEANUP_HOOK:
SETVAR(tv_register_cleanup);
break;
case LDPT_MESSAGE:
SETVAR(tv_message);
break;
case LDPT_ADD_INPUT_LIBRARY:
SETVAR(tv_add_input_library);
break;
case LDPT_SET_EXTRA_LIBRARY_PATH:
SETVAR(tv_set_extra_library_path);
break;
default:
break;
}
#undef SETVAR
return LDPS_OK;
}
/* Defs for archive parsing. */
#define ARMAGSIZE 8
typedef struct arhdr
{
char ar_name[16];
char ar_date[12];
char ar_uid[6];
char ar_gid[6];
char ar_mode[8];
char ar_size[10];
char ar_fmag[2];
} arhdr;
typedef struct linerec
{
struct linerec *next;
char line[];
} linerec;
#define LIBDEPS "__.LIBDEP/ "
static linerec *line_head, **line_tail = &line_head;
static enum ld_plugin_status
get_libdeps (int fd)
{
arhdr ah;
int len;
unsigned long mlen;
linerec *lr;
enum ld_plugin_status rc = LDPS_NO_SYMS;
lseek (fd, ARMAGSIZE, SEEK_SET);
for (;;)
{
len = read (fd, (void *) &ah, sizeof (ah));
if (len != sizeof (ah))
break;
mlen = strtoul (ah.ar_size, NULL, 10);
if (!mlen || strncmp (ah.ar_name, LIBDEPS, sizeof (LIBDEPS)-1))
{
lseek (fd, mlen, SEEK_CUR);
continue;
}
lr = malloc (sizeof (linerec) + mlen);
if (!lr)
return LDPS_ERR;
lr->next = NULL;
len = read (fd, lr->line, mlen);
lr->line[mlen-1] = '\0';
*line_tail = lr;
line_tail = &lr->next;
rc = LDPS_OK;
break;
}
return rc;
}
/* Turn a string into an argvec. */
static char **
str2vec (char *in)
{
char **res;
char *s, *first, *end;
char *sq, *dq;
int i;
end = in + strlen (in);
s = in;
while (isspace (*s)) s++;
first = s;
i = 1;
while ((s = strchr (s, ' ')))
{
s++;
i++;
}
res = (char **)malloc ((i+1) * sizeof (char *));
if (!res)
return res;
i = 0;
sq = NULL;
dq = NULL;
res[0] = first;
for (s = first; *s; s++)
{
if (*s == '\\')
{
memmove (s, s+1, end-s-1);
end--;
}
if (isspace (*s))
{
if (sq || dq)
continue;
*s++ = '\0';
while (isspace (*s)) s++;
if (*s)
res[++i] = s;
}
if (*s == '\'' && !dq)
{
if (sq)
{
memmove (sq, sq+1, s-sq-1);
memmove (s-2, s+1, end-s-1);
end -= 2;
s--;
sq = NULL;
}
else
{
sq = s;
}
}
if (*s == '"' && !sq)
{
if (dq)
{
memmove (dq, dq+1, s-dq-1);
memmove (s-2, s+1, end-s-1);
end -= 2;
s--;
dq = NULL;
}
else
{
dq = s;
}
}
}
res[++i] = NULL;
return res;
}
static char *prevfile;
/* Standard plugin API registerable hook. */
static enum ld_plugin_status
onclaim_file (const struct ld_plugin_input_file *file, int *claimed)
{
enum ld_plugin_status rv;
*claimed = 0;
/* If we've already seen this file, ignore it. */
if (prevfile && !strcmp (file->name, prevfile))
return LDPS_OK;
/* If it's not an archive member, ignore it. */
if (!file->offset)
return LDPS_OK;
if (prevfile)
free (prevfile);
prevfile = strdup (file->name);
if (!prevfile)
return LDPS_ERR;
/* This hook only gets called on actual object files.
* We have to examine the archive ourselves, to find
* our LIBDEPS member. */
rv = get_libdeps (file->fd);
if (rv == LDPS_ERR)
return rv;
if (rv == LDPS_OK)
{
linerec *lr = (linerec *)line_tail;
/* Inform the user/testsuite. */
TV_MESSAGE (LDPL_INFO, "got deps for library %s: %s",
file->name, lr->line);
fflush (NULL);
}
return LDPS_OK;
}
/* Standard plugin API registerable hook. */
static enum ld_plugin_status
onall_symbols_read (void)
{
linerec *lr;
char **vec;
enum ld_plugin_status rv = LDPS_OK;
while ((lr = line_head))
{
line_head = lr->next;
vec = str2vec (lr->line);
if (vec)
{
int i;
for (i = 0; vec[i]; i++)
{
if (vec[i][0] != '-')
{
TV_MESSAGE (LDPL_WARNING, "ignoring libdep argument %s",
vec[i]);
fflush (NULL);
continue;
}
if (vec[i][1] == 'l')
rv = tv_add_input_library (vec[i]+2);
else if (vec[i][1] == 'L')
rv = tv_set_extra_library_path (vec[i]+2);
else
{
TV_MESSAGE (LDPL_WARNING, "ignoring libdep argument %s",
vec[i]);
fflush (NULL);
}
if (rv != LDPS_OK)
break;
}
free (vec);
}
free (lr);
}
line_tail = NULL;
return rv;
}
/* Standard plugin API registerable hook. */
static enum ld_plugin_status
oncleanup (void)
{
if (prevfile)
{
free (prevfile);
prevfile = NULL;
}
if (line_head)
{
linerec *lr;
while ((lr = line_head))
{
line_head = lr->next;
free (lr);
}
line_tail = NULL;
}
return LDPS_OK;
}
/* Standard plugin API entry point. */
enum ld_plugin_status
onload (struct ld_plugin_tv *tv)
{
enum ld_plugin_status rv;
/* This plugin requires a valid tv array. */
if (!tv)
return LDPS_ERR;
/* First entry should always be LDPT_MESSAGE, letting us get
hold of it easily so we can send output straight away. */
if (tv[0].tv_tag == LDPT_MESSAGE)
tv_message = tv[0].tv_u.tv_message;
do
if ((rv = parse_tv_tag (tv)) != LDPS_OK)
return rv;
while ((tv++)->tv_tag != LDPT_NULL);
/* Register hooks. */
if (!tv_register_claim_file)
{
TV_MESSAGE (LDPL_FATAL, "No register_claim_file hook");
fflush (NULL);
return LDPS_ERR;
}
(*tv_register_claim_file) (onclaim_file);
if (!tv_register_all_symbols_read)
{
TV_MESSAGE (LDPL_FATAL, "No register_all_symbols_read hook");
fflush (NULL);
return LDPS_ERR;
}
(*tv_register_all_symbols_read) (onall_symbols_read);
if (!tv_register_cleanup)
{
TV_MESSAGE (LDPL_FATAL, "No register_cleanup hook");
fflush (NULL);
return LDPS_ERR;
}
(*tv_register_cleanup) (oncleanup);
fflush (NULL);
return LDPS_OK;
}
#endif /* BFD_SUPPORTS_PLUGINS */
|