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
|
# This shell script emits a C file. -*- C -*-
# It does some substitutions.
cat >e${EMULATION_NAME}.c <<EOF
/* An emulation for HP PA-RISC ELF linkers.
Copyright (C) 1991, 93, 94, 95, 97, 1999 Free Software Foundation, Inc.
Written by Steve Chamberlain steve@cygnus.com
This file is part of GLD, the Gnu Linker.
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 "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "ld.h"
#include "ldemul.h"
#include "ldfile.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldmisc.h"
#include "ldmain.h"
#include "ldctor.h"
/* Section in which we build stubs. */
static asection *stub_sec;
static lang_input_statement_type *stub_file;
/* FIXME. This doesn't belong here. */
extern lang_statement_list_type file_chain;
/* Perform some emulation specific initialization. For PA ELF we set
up the local label prefix and the output architecture. */
static void
hppaelf_before_parse ()
{
ldfile_output_architecture = bfd_arch_hppa;
}
/* Set the output architecture and machine. */
static void
hppaelf_set_output_arch()
{
unsigned long machine = 0;
bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine);
}
/* This is called before the input files are opened. We create a new
fake input file to hold the stub section. */
static void
hppaelf_create_output_section_statements ()
{
stub_file = lang_add_input_file ("linker stubs",
lang_input_file_is_fake_enum,
NULL);
stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
if (stub_file->the_bfd == NULL
|| ! bfd_set_arch_mach (stub_file->the_bfd,
bfd_get_arch (output_bfd),
bfd_get_mach (output_bfd)))
{
einfo ("%X%P: can not create BFD %E\n");
return;
}
stub_sec = bfd_make_section_old_way (stub_file->the_bfd, ".text");
/* Don't set SEC_RELOC until we actually have relocations in this
section. */
if (stub_sec == NULL
|| ! bfd_set_section_flags (stub_file->the_bfd, stub_sec,
(SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_IN_MEMORY)))
{
einfo ("%X%P: can not create stub section: %E\n");
return;
}
ldlang_add_file (stub_file);
}
/* Walk all the lang statements splicing out any padding statements from
the list. */
static void
hppaelf_delete_padding_statements (s, prev)
lang_statement_union_type *s;
lang_statement_union_type **prev;
{
lang_statement_union_type *sprev = NULL;
for (; s != NULL; s = s->next)
{
switch (s->header.type)
{
/* We want recursively walk these sections. */
case lang_constructors_statement_enum:
hppaelf_delete_padding_statements (constructor_list.head,
&constructor_list.head);
break;
case lang_output_section_statement_enum:
hppaelf_delete_padding_statements (s->output_section_statement.
children.head,
&s->output_section_statement.
children.head);
break;
/* Huh? What is a lang_wild_statement? */
case lang_wild_statement_enum:
hppaelf_delete_padding_statements (s->wild_statement.
children.head,
&s->wild_statement.
children.head);
break;
/* Here's what we are really looking for. Splice these out of
the list. */
case lang_padding_statement_enum:
if (sprev)
sprev->header.next = s->header.next;
else
**prev = *s;
break;
/* We don't care about these cases. */
case lang_data_statement_enum:
case lang_object_symbols_statement_enum:
case lang_output_statement_enum:
case lang_target_statement_enum:
case lang_input_section_enum:
case lang_input_statement_enum:
case lang_assignment_statement_enum:
case lang_address_statement_enum:
break;
default:
abort ();
break;
}
sprev = s;
}
}
/* Final emulation specific call. For the PA we use this opportunity
to build linker stubs. */
static void
hppaelf_finish ()
{
/* Call into the BFD backend to do the real work. */
if (elf32_hppa_size_stubs (stub_file->the_bfd, output_bfd, &link_info)
== false)
{
einfo ("%X%P: can not size stub section: %E\n");
return;
}
/* If the size of the stub section is nonzero, then we need
to resize the sections, recompute the assignments, and finally
build the stubs. */
if (bfd_section_size (stub_file->the_bfd, stub_file->the_bfd->sections) != 0)
{
/* Delete all the padding statements, they're no longer valid. */
hppaelf_delete_padding_statements (stat_ptr->head, &stat_ptr->head);
/* Resize the sections. */
lang_size_sections (stat_ptr->head, abs_output_section,
&stat_ptr->head, 0, (bfd_vma) 0, false);
/* Redo special stuff. */
ldemul_after_allocation ();
/* Do the assignments again. */
lang_do_assignments (stat_ptr->head,
abs_output_section,
(fill_type) 0, (bfd_vma) 0);
/* Now build the linker stubs. */
if (elf32_hppa_build_stubs (stub_file->the_bfd, &link_info) == false)
{
einfo ("%X%P: can not build stubs: %E\n");
return;
}
}
}
/* The script itself gets inserted here. */
static char *
hppaelf_get_script(isfile)
int *isfile;
EOF
if test -n "$COMPILE_IN"
then
# Scripts compiled in.
# sed commands to quote an ld script as a C string.
sc="-f stringify.sed"
cat >>e${EMULATION_NAME}.c <<EOF
{
*isfile = 0;
if (link_info.relocateable == true && config.build_constructors == true)
return
EOF
sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
echo ' ; else return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
echo '; }' >> e${EMULATION_NAME}.c
else
# Scripts read from the filesystem.
cat >>e${EMULATION_NAME}.c <<EOF
{
*isfile = 1;
if (link_info.relocateable == true && config.build_constructors == true)
return "ldscripts/${EMULATION_NAME}.xu";
else if (link_info.relocateable == true)
return "ldscripts/${EMULATION_NAME}.xr";
else if (!config.text_read_only)
return "ldscripts/${EMULATION_NAME}.xbn";
else if (!config.magic_demand_paged)
return "ldscripts/${EMULATION_NAME}.xn";
else
return "ldscripts/${EMULATION_NAME}.x";
}
EOF
fi
cat >>e${EMULATION_NAME}.c <<EOF
struct ld_emulation_xfer_struct ld_hppaelf_emulation =
{
hppaelf_before_parse,
syslib_default,
hll_default,
after_parse_default,
after_open_default,
after_allocation_default,
hppaelf_set_output_arch,
ldemul_default_target,
before_allocation_default,
hppaelf_get_script,
"hppaelf",
"elf32-hppa",
hppaelf_finish,
hppaelf_create_output_section_statements,
};
EOF
|
