Commit | Line | Data |
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c279ca3e | 1 | # This shell script emits a C file. -*- C -*- |
aa820537 AM |
2 | # Copyright 2003, 2004, 2005, 2007, 2008, 2009 |
3 | # Free Software Foundation, Inc. | |
c279ca3e | 4 | # |
f96b4a7b | 5 | # This file is part of the GNU Binutils. |
c279ca3e AM |
6 | # |
7 | # This program is free software; you can redistribute it and/or modify | |
8 | # it under the terms of the GNU General Public License as published by | |
f96b4a7b | 9 | # the Free Software Foundation; either version 3 of the License, or |
c279ca3e AM |
10 | # (at your option) any later version. |
11 | # | |
12 | # This program is distributed in the hope that it will be useful, | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | # GNU General Public License for more details. | |
16 | # | |
17 | # You should have received a copy of the GNU General Public License | |
18 | # along with this program; if not, write to the Free Software | |
f96b4a7b NC |
19 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | # MA 02110-1301, USA. | |
c279ca3e AM |
21 | # |
22 | ||
23 | # This file is sourced from elf32.em, and defines extra alpha | |
24 | # specific routines. | |
25 | # | |
92b93329 | 26 | fragment <<EOF |
c279ca3e AM |
27 | |
28 | #include "elf/internal.h" | |
29 | #include "elf/alpha.h" | |
30 | #include "elf-bfd.h" | |
31 | ||
8d6d53d4 | 32 | static bfd_boolean limit_32bit; |
8d6d53d4 RH |
33 | |
34 | extern bfd_boolean elf64_alpha_use_secureplt; | |
8d6d53d4 | 35 | |
c279ca3e AM |
36 | |
37 | /* Set the start address as in the Tru64 ld. */ | |
38 | #define ALPHA_TEXT_START_32BIT 0x12000000 | |
39 | ||
8d6d53d4 RH |
40 | static void |
41 | alpha_after_open (void) | |
42 | { | |
5503fea1 | 43 | if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour |
4dfe6ac6 | 44 | && elf_object_id (link_info.output_bfd) == ALPHA_ELF_DATA) |
8d6d53d4 RH |
45 | { |
46 | unsigned int num_plt; | |
47 | lang_output_section_statement_type *os; | |
48 | lang_output_section_statement_type *plt_os[2]; | |
49 | ||
50 | num_plt = 0; | |
51 | for (os = &lang_output_section_statement.head->output_section_statement; | |
52 | os != NULL; | |
53 | os = os->next) | |
54 | { | |
55 | if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0) | |
56 | { | |
57 | if (num_plt < 2) | |
58 | plt_os[num_plt] = os; | |
59 | ++num_plt; | |
60 | } | |
61 | } | |
62 | ||
63 | if (num_plt == 2) | |
64 | { | |
65 | plt_os[0]->constraint = elf64_alpha_use_secureplt ? 0 : -1; | |
66 | plt_os[1]->constraint = elf64_alpha_use_secureplt ? -1 : 0; | |
67 | } | |
68 | } | |
69 | ||
70 | gld${EMULATION_NAME}_after_open (); | |
71 | } | |
72 | ||
c279ca3e | 73 | static void |
0c7a8e5a | 74 | alpha_after_parse (void) |
c279ca3e | 75 | { |
8d6d53d4 | 76 | if (limit_32bit && !link_info.shared && !link_info.relocatable) |
c279ca3e AM |
77 | lang_section_start (".interp", |
78 | exp_binop ('+', | |
79 | exp_intop (ALPHA_TEXT_START_32BIT), | |
7a5df8d0 NC |
80 | exp_nameop (SIZEOF_HEADERS, NULL)), |
81 | NULL); | |
97b11f40 AM |
82 | |
83 | after_parse_default (); | |
c279ca3e AM |
84 | } |
85 | ||
8d6d53d4 RH |
86 | static void |
87 | alpha_before_allocation (void) | |
88 | { | |
89 | /* Call main function; we're just extending it. */ | |
90 | gld${EMULATION_NAME}_before_allocation (); | |
91 | ||
92 | /* Add -relax if -O, not -r, and not explicitly disabled. */ | |
28d5f677 NC |
93 | if (link_info.optimize && !link_info.relocatable && ! RELAXATION_DISABLED_BY_USER) |
94 | ENABLE_RELAXATION; | |
8d6d53d4 RH |
95 | } |
96 | ||
c279ca3e | 97 | static void |
0c7a8e5a | 98 | alpha_finish (void) |
c279ca3e | 99 | { |
8d6d53d4 | 100 | if (limit_32bit) |
f13a99db | 101 | elf_elfheader (link_info.output_bfd)->e_flags |= EF_ALPHA_32BIT; |
c279ca3e | 102 | |
eaeb0a9d | 103 | finish_default (); |
c279ca3e AM |
104 | } |
105 | EOF | |
106 | ||
107 | # Define some shell vars to insert bits of code into the standard elf | |
108 | # parse_args and list_options functions. | |
109 | # | |
110 | PARSE_AND_LIST_PROLOGUE=' | |
8d6d53d4 | 111 | #define OPTION_TASO 300 |
28d5f677 | 112 | #define OPTION_SECUREPLT (OPTION_TASO + 1) |
8d6d53d4 | 113 | #define OPTION_NO_SECUREPLT (OPTION_SECUREPLT + 1) |
c279ca3e AM |
114 | ' |
115 | ||
116 | PARSE_AND_LIST_LONGOPTS=' | |
8d6d53d4 | 117 | { "taso", no_argument, NULL, OPTION_TASO }, |
8d6d53d4 RH |
118 | { "secureplt", no_argument, NULL, OPTION_SECUREPLT }, |
119 | { "no-secureplt", no_argument, NULL, OPTION_NO_SECUREPLT }, | |
c279ca3e AM |
120 | ' |
121 | ||
122 | PARSE_AND_LIST_OPTIONS=' | |
8d6d53d4 | 123 | fprintf (file, _("\ |
442996ee AM |
124 | --taso Load executable in the lower 31-bit addressable\n\ |
125 | virtual address range.\n\ | |
442996ee AM |
126 | --secureplt Force PLT in text segment.\n\ |
127 | --no-secureplt Force PLT in data segment.\n\ | |
8d6d53d4 | 128 | ")); |
c279ca3e AM |
129 | ' |
130 | ||
131 | PARSE_AND_LIST_ARGS_CASES=' | |
132 | case OPTION_TASO: | |
8d6d53d4 RH |
133 | limit_32bit = 1; |
134 | break; | |
8d6d53d4 RH |
135 | case OPTION_SECUREPLT: |
136 | elf64_alpha_use_secureplt = TRUE; | |
137 | break; | |
138 | case OPTION_NO_SECUREPLT: | |
139 | elf64_alpha_use_secureplt = FALSE; | |
c279ca3e AM |
140 | break; |
141 | ' | |
142 | ||
143 | # Put these extra alpha routines in ld_${EMULATION_NAME}_emulation | |
144 | # | |
8d6d53d4 | 145 | LDEMUL_AFTER_OPEN=alpha_after_open |
c279ca3e | 146 | LDEMUL_AFTER_PARSE=alpha_after_parse |
8d6d53d4 | 147 | LDEMUL_BEFORE_ALLOCATION=alpha_before_allocation |
c279ca3e | 148 | LDEMUL_FINISH=alpha_finish |