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
|
# This shell script emits a C file. -*- C -*-
# It does some substitutions.
if [ -z "$MACHINE" ]; then
OUTPUT_ARCH=${ARCH}
else
OUTPUT_ARCH=${ARCH}:${MACHINE}
fi
cat >e${EMULATION_NAME}.c <<EOF
/* This file is is generated by a shell script. DO NOT EDIT! */
/* Linux a.out emulation code for ${EMULATION_NAME}
Copyright 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2003
Free Software Foundation, Inc.
Written by Steve Chamberlain <sac@cygnus.com>
Linux support by Eric Youngdale <ericy@cais.cais.com>
This file is part of GLD, the Gnu Linker.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define TARGET_IS_${EMULATION_NAME}
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldemul.h"
static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
static bfd_boolean gld${EMULATION_NAME}_open_dynamic_archive
PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
static void gld${EMULATION_NAME}_find_address_statement
PARAMS ((lang_statement_union_type *));
static void gld${EMULATION_NAME}_create_output_section_statements
PARAMS ((void));
static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
static void
gld${EMULATION_NAME}_before_parse()
{
const bfd_arch_info_type *arch = bfd_scan_arch ("${OUTPUT_ARCH}");
if (arch)
{
ldfile_output_architecture = arch->arch;
ldfile_output_machine = arch->mach;
ldfile_output_machine_name = arch->printable_name;
}
else
ldfile_output_architecture = bfd_arch_${ARCH};
config.dynamic_link = TRUE;
config.has_shared = TRUE;
}
/* Try to open a dynamic archive. This is where we know that Linux
dynamic libraries have an extension of .sa. */
static bfd_boolean
gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
const char *arch;
search_dirs_type *search;
lang_input_statement_type *entry;
{
char *string;
if (! entry->is_archive)
return FALSE;
string = (char *) xmalloc (strlen (search->name)
+ strlen (entry->filename)
+ strlen (arch)
+ sizeof "/lib.sa");
sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch);
if (! ldfile_try_open_bfd (string, entry))
{
free (string);
return FALSE;
}
entry->filename = string;
return TRUE;
}
/* This is called by the create_output_section_statements routine via
lang_for_each_statement. It locates any address assignment to
.text, and modifies it to include the size of the headers. This
causes -Ttext to mean the starting address of the header, rather
than the starting address of .text, which is compatible with other
Linux tools. */
static void
gld${EMULATION_NAME}_find_address_statement (s)
lang_statement_union_type *s;
{
if (s->header.type == lang_address_statement_enum
&& strcmp (s->address_statement.section_name, ".text") == 0)
{
ASSERT (s->address_statement.address->type.node_class == etree_value);
s->address_statement.address->value.value += 0x20;
}
}
/* This is called before opening the input BFD's. */
static void
gld${EMULATION_NAME}_create_output_section_statements ()
{
lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement);
}
/* This is called after the sections have been attached to output
sections, but before any sizes or addresses have been set. */
static void
gld${EMULATION_NAME}_before_allocation ()
{
if (link_info.relocatable)
return;
/* Let the backend work out the sizes of any sections required by
dynamic linking. */
if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info))
einfo ("%P%F: failed to set dynamic section sizes: %E\n");
}
static char *
gld${EMULATION_NAME}_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.relocatable && config.build_constructors)
return
EOF
sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
echo ' ; else if (link_info.relocatable) return' >> e${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${EMULATION_NAME}.c <<EOF
{
*isfile = 1;
if (link_info.relocatable && config.build_constructors)
return "ldscripts/${EMULATION_NAME}.xu";
else if (link_info.relocatable)
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${EMULATION_NAME}.c <<EOF
struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
{
gld${EMULATION_NAME}_before_parse,
syslib_default,
hll_default,
after_parse_default,
after_open_default,
after_allocation_default,
set_output_arch_default,
ldemul_default_target,
gld${EMULATION_NAME}_before_allocation,
gld${EMULATION_NAME}_get_script,
"${EMULATION_NAME}",
"${OUTPUT_FORMAT}",
NULL, /* finish */
gld${EMULATION_NAME}_create_output_section_statements,
gld${EMULATION_NAME}_open_dynamic_archive,
NULL, /* place orphan */
NULL, /* set symbols */
NULL, /* parse args */
NULL, /* add_options */
NULL, /* handle_option */
NULL, /* unrecognized file */
NULL, /* list options */
NULL, /* recognized file */
NULL, /* find_potential_libraries */
NULL /* new_vers_pattern */
};
EOF
|
