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
|
/* a.out object file format
Copyright (C) 1989-2018 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS 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,
or (at your option) any later version.
GAS 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 GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#define OBJ_HEADER "obj-aout.h"
#include "as.h"
#undef NO_RELOC
#include "aout/aout64.h"
void
obj_aout_frob_symbol (symbolS *sym, int *punt ATTRIBUTE_UNUSED)
{
flagword flags;
asection *sec;
int type;
flags = symbol_get_bfdsym (sym)->flags;
type = aout_symbol (symbol_get_bfdsym (sym))->type;
sec = S_GET_SEGMENT (sym);
/* Only frob simple symbols this way right now. */
if (! (type & ~ (N_TYPE | N_EXT)))
{
if (type == (N_UNDF | N_EXT)
&& sec == bfd_abs_section_ptr)
{
sec = bfd_und_section_ptr;
S_SET_SEGMENT (sym, sec);
}
if ((type & N_TYPE) != N_INDR
&& (type & N_TYPE) != N_SETA
&& (type & N_TYPE) != N_SETT
&& (type & N_TYPE) != N_SETD
&& (type & N_TYPE) != N_SETB
&& type != N_WARNING
&& (sec == bfd_abs_section_ptr
|| sec == bfd_und_section_ptr))
return;
if (flags & BSF_EXPORT)
type |= N_EXT;
switch (type & N_TYPE)
{
case N_SETA:
case N_SETT:
case N_SETD:
case N_SETB:
/* Set the debugging flag for constructor symbols so that
BFD leaves them alone. */
symbol_get_bfdsym (sym)->flags |= BSF_DEBUGGING;
/* You can't put a common symbol in a set. The way a set
element works is that the symbol has a definition and a
name, and the linker adds the definition to the set of
that name. That does not work for a common symbol,
because the linker can't tell which common symbol the
user means. FIXME: Using as_bad here may be
inappropriate, since the user may want to force a
particular type without regard to the semantics of sets;
on the other hand, we certainly don't want anybody to be
mislead into thinking that their code will work. */
if (S_IS_COMMON (sym))
as_bad (_("Attempt to put a common symbol into set %s"),
S_GET_NAME (sym));
/* Similarly, you can't put an undefined symbol in a set. */
else if (! S_IS_DEFINED (sym))
as_bad (_("Attempt to put an undefined symbol into set %s"),
S_GET_NAME (sym));
break;
case N_INDR:
/* Put indirect symbols in the indirect section. */
S_SET_SEGMENT (sym, bfd_ind_section_ptr);
symbol_get_bfdsym (sym)->flags |= BSF_INDIRECT;
if (type & N_EXT)
{
symbol_get_bfdsym (sym)->flags |= BSF_EXPORT;
symbol_get_bfdsym (sym)->flags &=~ BSF_LOCAL;
}
break;
case N_WARNING:
/* Mark warning symbols. */
symbol_get_bfdsym (sym)->flags |= BSF_WARNING;
break;
}
}
else
symbol_get_bfdsym (sym)->flags |= BSF_DEBUGGING;
aout_symbol (symbol_get_bfdsym (sym))->type = type;
/* Double check weak symbols. */
if (S_IS_WEAK (sym) && S_IS_COMMON (sym))
as_bad (_("Symbol `%s' can not be both weak and common"),
S_GET_NAME (sym));
}
void
obj_aout_frob_file_before_fix (void)
{
/* Relocation processing may require knowing the VMAs of the sections.
Since writing to a section will cause the BFD back end to compute the
VMAs, fake it out here.... */
bfd_byte b = 0;
bfd_boolean x = TRUE;
if (bfd_section_size (stdoutput, text_section) != 0)
x = bfd_set_section_contents (stdoutput, text_section, &b, (file_ptr) 0,
(bfd_size_type) 1);
else if (bfd_section_size (stdoutput, data_section) != 0)
x = bfd_set_section_contents (stdoutput, data_section, &b, (file_ptr) 0,
(bfd_size_type) 1);
gas_assert (x);
}
static void
obj_aout_line (int ignore ATTRIBUTE_UNUSED)
{
/* Assume delimiter is part of expression.
BSD4.2 as fails with delightful bug, so we
are not being incompatible here. */
new_logical_line ((char *) NULL, (int) (get_absolute_expression ()));
demand_empty_rest_of_line ();
}
/* Handle .weak. This is a GNU extension. */
static void
obj_aout_weak (int ignore ATTRIBUTE_UNUSED)
{
char *name;
int c;
symbolS *symbolP;
do
{
c = get_symbol_name (&name);
symbolP = symbol_find_or_make (name);
(void) restore_line_pointer (c);
SKIP_WHITESPACE ();
S_SET_WEAK (symbolP);
if (c == ',')
{
input_line_pointer++;
SKIP_WHITESPACE ();
if (*input_line_pointer == '\n')
c = '\n';
}
}
while (c == ',');
demand_empty_rest_of_line ();
}
/* Handle .type. On {Net,Open}BSD, this is used to set the n_other field,
which is then apparently used when doing dynamic linking. Older
versions of gas ignored the .type pseudo-op, so we also ignore it if
we can't parse it. */
static void
obj_aout_type (int ignore ATTRIBUTE_UNUSED)
{
char *name;
int c;
symbolS *sym;
c = get_symbol_name (&name);
sym = symbol_find_or_make (name);
(void) restore_line_pointer (c);
SKIP_WHITESPACE ();
if (*input_line_pointer == ',')
{
++input_line_pointer;
SKIP_WHITESPACE ();
if (*input_line_pointer == '@')
{
++input_line_pointer;
if (strncmp (input_line_pointer, "object", 6) == 0)
S_SET_OTHER (sym, 1);
else if (strncmp (input_line_pointer, "function", 8) == 0)
S_SET_OTHER (sym, 2);
}
}
/* Ignore everything else on the line. */
s_ignore (0);
}
/* Support for an AOUT emulation. */
static void
aout_pop_insert (void)
{
pop_insert (aout_pseudo_table);
}
static int
obj_aout_s_get_other (symbolS *sym)
{
return aout_symbol (symbol_get_bfdsym (sym))->other;
}
static void
obj_aout_s_set_other (symbolS *sym, int o)
{
aout_symbol (symbol_get_bfdsym (sym))->other = o;
}
static int
obj_aout_sec_sym_ok_for_reloc (asection *sec ATTRIBUTE_UNUSED)
{
return obj_sec_sym_ok_for_reloc (sec);
}
static void
obj_aout_process_stab (segT seg ATTRIBUTE_UNUSED,
int w,
const char *s,
int t,
int o,
int d)
{
aout_process_stab (w, s, t, o, d);
}
static int
obj_aout_s_get_desc (symbolS *sym)
{
return aout_symbol (symbol_get_bfdsym (sym))->desc;
}
static void
obj_aout_s_set_desc (symbolS *sym, int d)
{
aout_symbol (symbol_get_bfdsym (sym))->desc = d;
}
static int
obj_aout_s_get_type (symbolS *sym)
{
return aout_symbol (symbol_get_bfdsym (sym))->type;
}
static void
obj_aout_s_set_type (symbolS *sym, int t)
{
aout_symbol (symbol_get_bfdsym (sym))->type = t;
}
static int
obj_aout_separate_stab_sections (void)
{
return 0;
}
/* When changed, make sure these table entries match the single-format
definitions in obj-aout.h. */
const struct format_ops aout_format_ops =
{
bfd_target_aout_flavour,
1, /* dfl_leading_underscore. */
0, /* emit_section_symbols. */
0, /* begin. */
0, /* app_file. */
obj_aout_frob_symbol,
0, /* frob_file. */
0, /* frob_file_before_adjust. */
obj_aout_frob_file_before_fix,
0, /* frob_file_after_relocs. */
0, /* s_get_size. */
0, /* s_set_size. */
0, /* s_get_align. */
0, /* s_set_align. */
obj_aout_s_get_other,
obj_aout_s_set_other,
obj_aout_s_get_desc,
obj_aout_s_set_desc,
obj_aout_s_get_type,
obj_aout_s_set_type,
0, /* copy_symbol_attributes. */
0, /* generate_asm_lineno. */
obj_aout_process_stab,
obj_aout_separate_stab_sections,
0, /* init_stab_section. */
obj_aout_sec_sym_ok_for_reloc,
aout_pop_insert,
0, /* ecoff_set_ext. */
0, /* read_begin_hook. */
0, /* symbol_new_hook. */
0, /* symbol_clone_hook. */
0 /* adjust_symtab. */
};
const pseudo_typeS aout_pseudo_table[] =
{
{"line", obj_aout_line, 0}, /* Source code line number. */
{"ln", obj_aout_line, 0}, /* COFF line number that we use anyway. */
{"weak", obj_aout_weak, 0}, /* Mark symbol as weak. */
{"type", obj_aout_type, 0},
/* coff debug pseudos (ignored) */
{"def", s_ignore, 0},
{"dim", s_ignore, 0},
{"endef", s_ignore, 0},
{"ident", s_ignore, 0},
{"line", s_ignore, 0},
{"ln", s_ignore, 0},
{"scl", s_ignore, 0},
{"size", s_ignore, 0},
{"tag", s_ignore, 0},
{"val", s_ignore, 0},
{"version", s_ignore, 0},
{"optim", s_ignore, 0}, /* For sun386i cc (?). */
/* other stuff */
{"ABORT", s_abort, 0},
{NULL, NULL, 0}
};
|