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
|
# This shell script emits a C file. -*- C -*-
# Copyright (C) 2003-2018 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 alpha
# specific routines.
#
fragment <<EOF
#include "elf/internal.h"
#include "elf/alpha.h"
#include "elf-bfd.h"
static bfd_boolean limit_32bit;
extern bfd_boolean elf64_alpha_use_secureplt;
/* Set the start address as in the Tru64 ld. */
#define ALPHA_TEXT_START_32BIT 0x12000000
static void
alpha_after_open (void)
{
if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
&& elf_object_id (link_info.output_bfd) == ALPHA_ELF_DATA)
{
unsigned int num_plt;
lang_output_section_statement_type *os;
lang_output_section_statement_type *plt_os[2];
num_plt = 0;
for (os = &lang_output_section_statement.head->output_section_statement;
os != NULL;
os = os->next)
{
if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0)
{
if (num_plt < 2)
plt_os[num_plt] = os;
++num_plt;
}
}
if (num_plt == 2)
{
plt_os[0]->constraint = elf64_alpha_use_secureplt ? 0 : -1;
plt_os[1]->constraint = elf64_alpha_use_secureplt ? -1 : 0;
}
}
gld${EMULATION_NAME}_after_open ();
}
static void
alpha_after_parse (void)
{
link_info.relax_pass = 2;
if (limit_32bit
&& !bfd_link_pic (&link_info)
&& !bfd_link_relocatable (&link_info))
lang_section_start (".interp",
exp_binop ('+',
exp_intop (ALPHA_TEXT_START_32BIT),
exp_nameop (SIZEOF_HEADERS, NULL)),
NULL);
gld${EMULATION_NAME}_after_parse ();
}
static void
alpha_before_allocation (void)
{
/* Call main function; we're just extending it. */
gld${EMULATION_NAME}_before_allocation ();
/* Add -relax if -O, not -r, and not explicitly disabled. */
if (link_info.optimize
&& !bfd_link_relocatable (&link_info)
&& ! RELAXATION_DISABLED_BY_USER)
ENABLE_RELAXATION;
}
static void
alpha_finish (void)
{
if (limit_32bit)
elf_elfheader (link_info.output_bfd)->e_flags |= EF_ALPHA_32BIT;
finish_default ();
}
EOF
# Define some shell vars to insert bits of code into the standard elf
# parse_args and list_options functions.
#
PARSE_AND_LIST_PROLOGUE='
#define OPTION_TASO 300
#define OPTION_SECUREPLT (OPTION_TASO + 1)
#define OPTION_NO_SECUREPLT (OPTION_SECUREPLT + 1)
'
PARSE_AND_LIST_LONGOPTS='
{ "taso", no_argument, NULL, OPTION_TASO },
{ "secureplt", no_argument, NULL, OPTION_SECUREPLT },
{ "no-secureplt", no_argument, NULL, OPTION_NO_SECUREPLT },
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _("\
--taso Load executable in the lower 31-bit addressable\n\
virtual address range.\n\
--secureplt Force PLT in text segment.\n\
--no-secureplt Force PLT in data segment.\n\
"));
'
PARSE_AND_LIST_ARGS_CASES='
case OPTION_TASO:
limit_32bit = 1;
break;
case OPTION_SECUREPLT:
elf64_alpha_use_secureplt = TRUE;
break;
case OPTION_NO_SECUREPLT:
elf64_alpha_use_secureplt = FALSE;
break;
'
# Put these extra alpha routines in ld_${EMULATION_NAME}_emulation
#
LDEMUL_AFTER_OPEN=alpha_after_open
LDEMUL_AFTER_PARSE=alpha_after_parse
LDEMUL_BEFORE_ALLOCATION=alpha_before_allocation
LDEMUL_FINISH=alpha_finish
|
