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
|
# This shell script emits a C file. -*- C -*-
# Copyright 2001 Free Software Foundation, Inc.
#
# 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.
#
# This file is sourced from elf32.em and mmo.em, used to define
# linker MMIX-specifics common to ELF and MMO.
. ${srcdir}/emultempl/mmix-elfnmmo.em
cat >>e${EMULATION_NAME}.c <<EOF
static boolean mmo_place_orphan
PARAMS ((lang_input_statement_type *, asection *));
static asection *output_prev_sec_find
PARAMS ((lang_output_section_statement_type *));
static void mmo_finish PARAMS ((void));
static void mmo_wipe_sec_reloc_flag PARAMS ((bfd *, asection *, PTR));
/* Find the last output section before given output statement.
Used by place_orphan. */
static asection *
output_prev_sec_find (os)
lang_output_section_statement_type *os;
{
asection *s = (asection *) NULL;
lang_statement_union_type *u;
lang_output_section_statement_type *lookup;
for (u = lang_output_section_statement.head;
u != (lang_statement_union_type *) NULL;
u = lookup->next)
{
lookup = &u->output_section_statement;
if (lookup == os)
break;
if (lookup->bfd_section != NULL
&& lookup->bfd_section != bfd_abs_section_ptr
&& lookup->bfd_section != bfd_com_section_ptr
&& lookup->bfd_section != bfd_und_section_ptr)
s = lookup->bfd_section;
}
if (u == NULL)
return NULL;
return s;
}
struct orphan_save {
lang_output_section_statement_type *os;
asection **section;
lang_statement_union_type **stmt;
};
#define HAVE_SECTION(hold, name) \
(hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL)
/* Place an orphan section. We use this to put random SEC_CODE or
SEC_READONLY sections right after MMO_TEXT_SECTION_NAME. Much borrowed
from elf32.em. */
static boolean
mmo_place_orphan (file, s)
lang_input_statement_type *file;
asection *s;
{
static struct orphan_save hold_text;
struct orphan_save *place;
lang_output_section_statement_type *os;
lang_statement_list_type *old;
lang_statement_list_type add;
asection *snew, **pps, *bfd_section;
/* We have nothing to say for anything other than a final link. */
if (link_info.relocateable
|| (bfd_get_section_flags (s->owner, s)
& (SEC_EXCLUDE | SEC_LOAD)) != SEC_LOAD)
return false;
/* Only care for sections we're going to load. */
os = lang_output_section_find (bfd_get_section_name (s->owner, s));
/* We have an output section by this name. Place the section inside it
(regardless of whether the linker script lists it as input). */
if (os != NULL)
{
lang_add_section (&os->children, s, os, file);
return true;
}
/* If this section does not have .text-type section flags or there's no
MMO_TEXT_SECTION_NAME, we don't have anything to say. */
if ((bfd_get_section_flags (s->owner, s) & (SEC_CODE | SEC_READONLY)) == 0)
return false;
if (hold_text.os == NULL)
hold_text.os = lang_output_section_find (MMO_TEXT_SECTION_NAME);
place = &hold_text;
/* If there's an output section by this name, we'll use it, regardless
of section flags, in contrast to what's done in elf32.em. */
/* Start building a list of statements for this section.
First save the current statement pointer. */
old = stat_ptr;
/* Add the output section statements for this orphan to our own private
list, inserting them later into the global statement list. */
stat_ptr = &add;
lang_list_init (stat_ptr);
os = lang_enter_output_section_statement (bfd_get_section_name (s->owner,
s),
NULL, 0,
(bfd_vma) 0,
(etree_type *) NULL,
(etree_type *) NULL,
(etree_type *) NULL);
lang_add_section (&os->children, s, os, file);
lang_leave_output_section_statement
((bfd_vma) 0, "*default*",
(struct lang_output_section_phdr_list *) NULL, "*default*");
/* Restore the global list pointer. */
stat_ptr = old;
snew = os->bfd_section;
bfd_section = place->os->bfd_section;
if (place->section == NULL && bfd_section == NULL)
bfd_section = output_prev_sec_find (place->os);
if (place->section != NULL
|| (bfd_section != NULL
&& bfd_section != snew))
{
/* Shuffle the section to make the output file look neater. This is
really only cosmetic. */
if (place->section == NULL)
/* Put orphans after the first section on the list. */
place->section = &bfd_section->next;
/* Unlink the section. */
for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
;
bfd_section_list_remove (output_bfd, pps);
/* Now tack it on to the "place->os" section list. */
bfd_section_list_insert (output_bfd, place->section, snew);
}
place->section = &snew->next; /* Save the end of this list. */
if (add.head != NULL)
{
/* We try to put the output statements in some sort of reasonable
order here, because they determine the final load addresses of
the orphan sections. */
if (place->stmt == NULL)
{
/* Put the new statement list right at the head. */
*add.tail = place->os->header.next;
place->os->header.next = add.head;
}
else
{
/* Put it after the last orphan statement we added. */
*add.tail = *place->stmt;
*place->stmt = add.head;
}
/* Fix the global list pointer if we happened to tack our new list
at the tail. */
if (*old->tail == add.head)
old->tail = add.tail;
/* Save the end of this list. */
place->stmt = add.tail;
}
return true;
}
/* Remove the spurious settings of SEC_RELOC that make it to the output at
link time. We are as confused as elflink.h:elf_bfd_final_link, and
paper over the bug similarly. */
static void
mmo_wipe_sec_reloc_flag (abfd, sec, ptr)
bfd *abfd;
asection *sec;
PTR ptr ATTRIBUTE_UNUSED;
{
bfd_set_section_flags (abfd, sec,
bfd_get_section_flags (abfd, sec) & ~SEC_RELOC);
}
/* Iterate with bfd_map_over_sections over mmo_wipe_sec_reloc_flag... */
static void
mmo_finish ()
{
bfd_map_over_sections (output_bfd, mmo_wipe_sec_reloc_flag, NULL);
}
EOF
LDEMUL_PLACE_ORPHAN=mmo_place_orphan
LDEMUL_FINISH=mmo_finish
|
