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
|
# This shell script emits a C file. -*- C -*-
# Copyright (C) 2011-2019 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.
#
# This file is sourced from elf32.em, and defines extra C6X DSBT specific
# features.
#
fragment <<EOF
#include "ldctor.h"
#include "elf32-tic6x.h"
static struct elf32_tic6x_params params =
{
0, 64
};
static int merge_exidx_entries = -1;
static int
is_tic6x_target (void)
{
extern const bfd_target tic6x_elf32_le_vec;
extern const bfd_target tic6x_elf32_be_vec;
extern const bfd_target tic6x_elf32_linux_le_vec;
extern const bfd_target tic6x_elf32_linux_be_vec;
extern const bfd_target tic6x_elf32_c6000_le_vec;
extern const bfd_target tic6x_elf32_c6000_be_vec;
return (link_info.output_bfd->xvec == &tic6x_elf32_le_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_be_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_linux_le_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_linux_be_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_c6000_le_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_c6000_be_vec);
}
/* Pass params to backend. */
static void
tic6x_after_open (void)
{
if (is_tic6x_target ())
{
if (params.dsbt_index >= params.dsbt_size)
{
einfo (_("%F%P: invalid --dsbt-index %d, outside DSBT size\n"),
params.dsbt_index);
}
elf32_tic6x_setup (&link_info, ¶ms);
}
gld${EMULATION_NAME}_after_open ();
}
static int
compare_output_sec_vma (const void *a, const void *b)
{
asection *asec = *(asection **) a, *bsec = *(asection **) b;
asection *aout = asec->output_section, *bout = bsec->output_section;
bfd_vma avma, bvma;
/* If there's no output section for some reason, compare equal. */
if (!aout || !bout)
return 0;
avma = aout->vma + asec->output_offset;
bvma = bout->vma + bsec->output_offset;
if (avma > bvma)
return 1;
else if (avma < bvma)
return -1;
return 0;
}
static void
gld${EMULATION_NAME}_after_allocation (void)
{
int layout_changed = 0;
int ret;
if (!bfd_link_relocatable (&link_info))
{
/* Build a sorted list of input text sections, then use that to process
the unwind table index. */
unsigned int list_size = 10;
asection **sec_list = (asection **)
xmalloc (list_size * sizeof (asection *));
unsigned int sec_count = 0;
LANG_FOR_EACH_INPUT_STATEMENT (is)
{
bfd *abfd = is->the_bfd;
asection *sec;
if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
continue;
for (sec = abfd->sections; sec != NULL; sec = sec->next)
{
asection *out_sec = sec->output_section;
if (out_sec
&& elf_section_data (sec)
&& elf_section_type (sec) == SHT_PROGBITS
&& (elf_section_flags (sec) & SHF_EXECINSTR) != 0
&& (sec->flags & SEC_EXCLUDE) == 0
&& sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
&& out_sec != bfd_abs_section_ptr)
{
if (sec_count == list_size)
{
list_size *= 2;
sec_list = (asection **)
xrealloc (sec_list, list_size * sizeof (asection *));
}
sec_list[sec_count++] = sec;
}
}
}
qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma);
if (elf32_tic6x_fix_exidx_coverage (sec_list, sec_count, &link_info,
merge_exidx_entries))
layout_changed = 1;
free (sec_list);
}
/* bfd_elf32_discard_info just plays with debugging sections,
ie. doesn't affect any code, so we can delay resizing the
sections. */
ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
if (ret < 0)
{
einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
return;
}
else if (ret > 0)
layout_changed = 1;
gld${EMULATION_NAME}_map_segments (layout_changed);
}
EOF
# This code gets inserted into the generic elf32.sc linker script
# and allows us to define our own command line switches.
PARSE_AND_LIST_PROLOGUE='
#define OPTION_DSBT_INDEX 300
#define OPTION_DSBT_SIZE 301
#define OPTION_NO_MERGE_EXIDX_ENTRIES 302
'
PARSE_AND_LIST_LONGOPTS='
{"dsbt-index", required_argument, NULL, OPTION_DSBT_INDEX},
{"dsbt-size", required_argument, NULL, OPTION_DSBT_SIZE},
{ "no-merge-exidx-entries", no_argument, NULL, OPTION_NO_MERGE_EXIDX_ENTRIES },
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _(" --dsbt-index <index> Use this as the DSBT index for the output object\n"));
fprintf (file, _(" --dsbt-size <index> Use this as the number of entries in the DSBT table\n"));
fprintf (file, _(" --no-merge-exidx-entries\n"));
fprintf (file, _(" Disable merging exidx entries\n"));
'
PARSE_AND_LIST_ARGS_CASES='
case OPTION_DSBT_INDEX:
{
char *end;
params.dsbt_index = strtol (optarg, &end, 0);
if (*end == 0
&& params.dsbt_index >= 0 && params.dsbt_index < 0x7fff)
break;
einfo (_("%F%P: invalid --dsbt-index %s\n"), optarg);
}
break;
case OPTION_DSBT_SIZE:
{
char *end;
params.dsbt_size = strtol (optarg, &end, 0);
if (*end == 0
&& params.dsbt_size >= 0 && params.dsbt_size < 0x7fff)
break;
einfo (_("%F%P: invalid --dsbt-size %s\n"), optarg);
}
break;
case OPTION_NO_MERGE_EXIDX_ENTRIES:
merge_exidx_entries = 0;
'
LDEMUL_AFTER_OPEN=tic6x_after_open
LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
|
