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f9e6bfa8 | 1 | # This shell script emits a C file. -*- C -*- |
c9a2f333 | 2 | # Copyright 2003, 2005 Free Software Foundation, Inc. |
f9e6bfa8 AM |
3 | # |
4 | # This file is part of GLD, the Gnu Linker. | |
5 | # | |
6 | # This program is free software; you can redistribute it and/or modify | |
7 | # it under the terms of the GNU General Public License as published by | |
8 | # the Free Software Foundation; either version 2 of the License, or | |
9 | # (at your option) any later version. | |
10 | # | |
11 | # This program is distributed in the hope that it will be useful, | |
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | # GNU General Public License for more details. | |
15 | # | |
16 | # You should have received a copy of the GNU General Public License | |
17 | # along with this program; if not, write to the Free Software | |
75be928b | 18 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
f9e6bfa8 AM |
19 | # |
20 | ||
c9a2f333 | 21 | # This file is sourced from elf32.em, and defines extra powerpc32-elf |
f9e6bfa8 AM |
22 | # specific routines. |
23 | # | |
24 | cat >>e${EMULATION_NAME}.c <<EOF | |
25 | ||
26 | #include "libbfd.h" | |
27 | #include "elf32-ppc.h" | |
28 | ||
c9a2f333 AM |
29 | extern const bfd_target bfd_elf32_powerpc_vec; |
30 | extern const bfd_target bfd_elf32_powerpcle_vec; | |
9d8504b1 PB |
31 | extern const bfd_target bfd_elf32_powerpc_vxworks_vec; |
32 | ||
33 | static inline int | |
34 | is_ppc_elf32_vec(const bfd_target * vec) | |
35 | { | |
36 | return (vec == &bfd_elf32_powerpc_vec | |
37 | || vec == &bfd_elf32_powerpc_vxworks_vec | |
38 | || vec == &bfd_elf32_powerpcle_vec); | |
39 | } | |
c9a2f333 | 40 | |
f9e6bfa8 AM |
41 | /* Whether to run tls optimization. */ |
42 | static int notlsopt = 0; | |
43 | ||
0ba07910 AM |
44 | /* Whether to emit symbols for stubs. */ |
45 | static int emit_stub_syms = 0; | |
46 | ||
0cf7d72c AM |
47 | /* Chooses the correct place for .plt and .got. */ |
48 | static int old_plt = 0; | |
49 | static int old_got = 0; | |
50 | ||
51 | static void | |
52 | ppc_after_open (void) | |
53 | { | |
9d8504b1 | 54 | if (is_ppc_elf32_vec (link_info.hash->creator)) |
0cf7d72c AM |
55 | { |
56 | int new_plt; | |
57 | int keep_new; | |
58 | unsigned int num_plt; | |
59 | unsigned int num_got; | |
60 | lang_output_section_statement_type *os; | |
61 | lang_output_section_statement_type *plt_os[2]; | |
62 | lang_output_section_statement_type *got_os[2]; | |
63 | ||
0ba07910 AM |
64 | emit_stub_syms |= link_info.emitrelocations; |
65 | new_plt = ppc_elf_select_plt_layout (output_bfd, &link_info, old_plt, | |
66 | emit_stub_syms); | |
0cf7d72c AM |
67 | if (new_plt < 0) |
68 | einfo ("%X%P: select_plt_layout problem %E\n"); | |
69 | ||
70 | num_got = 0; | |
71 | num_plt = 0; | |
72 | for (os = &lang_output_section_statement.head->output_section_statement; | |
73 | os != NULL; | |
74 | os = os->next) | |
75 | { | |
76 | if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0) | |
77 | { | |
78 | if (num_plt < 2) | |
79 | plt_os[num_plt] = os; | |
80 | ++num_plt; | |
81 | } | |
82 | if (os->constraint == SPECIAL && strcmp (os->name, ".got") == 0) | |
83 | { | |
84 | if (num_got < 2) | |
85 | got_os[num_got] = os; | |
86 | ++num_got; | |
87 | } | |
88 | } | |
89 | ||
90 | keep_new = new_plt == 1 ? 0 : -1; | |
91 | if (num_plt == 2) | |
92 | { | |
93 | plt_os[0]->constraint = keep_new; | |
94 | plt_os[1]->constraint = ~keep_new; | |
95 | } | |
96 | if (num_got == 2) | |
97 | { | |
98 | if (old_got) | |
99 | keep_new = -1; | |
100 | got_os[0]->constraint = keep_new; | |
101 | got_os[1]->constraint = ~keep_new; | |
102 | } | |
103 | } | |
104 | ||
105 | gld${EMULATION_NAME}_after_open (); | |
106 | } | |
107 | ||
f9e6bfa8 | 108 | static void |
7e5d8d48 | 109 | ppc_before_allocation (void) |
f9e6bfa8 | 110 | { |
9d8504b1 | 111 | if (is_ppc_elf32_vec (link_info.hash->creator)) |
f9e6bfa8 AM |
112 | { |
113 | if (ppc_elf_tls_setup (output_bfd, &link_info) && !notlsopt) | |
114 | { | |
115 | if (!ppc_elf_tls_optimize (output_bfd, &link_info)) | |
116 | { | |
117 | einfo ("%X%P: TLS problem %E\n"); | |
118 | return; | |
119 | } | |
120 | } | |
121 | } | |
122 | gld${EMULATION_NAME}_before_allocation (); | |
123 | } | |
124 | ||
125 | EOF | |
126 | ||
127 | # Define some shell vars to insert bits of code into the standard elf | |
128 | # parse_args and list_options functions. | |
129 | # | |
130 | PARSE_AND_LIST_PROLOGUE=' | |
131 | #define OPTION_NO_TLS_OPT 301 | |
0cf7d72c AM |
132 | #define OPTION_OLD_PLT 302 |
133 | #define OPTION_OLD_GOT 303 | |
0ba07910 | 134 | #define OPTION_STUBSYMS 304 |
f9e6bfa8 AM |
135 | ' |
136 | ||
f9e6bfa8 | 137 | PARSE_AND_LIST_LONGOPTS=' |
0ba07910 | 138 | { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS }, |
f9e6bfa8 | 139 | { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT }, |
0cf7d72c AM |
140 | { "bss-plt", no_argument, NULL, OPTION_OLD_PLT }, |
141 | { "sdata-got", no_argument, NULL, OPTION_OLD_GOT }, | |
f9e6bfa8 AM |
142 | ' |
143 | ||
144 | PARSE_AND_LIST_OPTIONS=' | |
145 | fprintf (file, _("\ | |
0ba07910 | 146 | --emit-stub-syms Label linker stubs with a symbol.\n\ |
0cf7d72c AM |
147 | --no-tls-optimize Don'\''t try to optimize TLS accesses.\n\ |
148 | --bss-plt Force old-style BSS PLT.\n\ | |
149 | --sdata-got Force GOT location just before .sdata.\n" | |
f9e6bfa8 AM |
150 | )); |
151 | ' | |
152 | ||
153 | PARSE_AND_LIST_ARGS_CASES=' | |
0ba07910 AM |
154 | case OPTION_STUBSYMS: |
155 | emit_stub_syms = 1; | |
156 | break; | |
157 | ||
f9e6bfa8 AM |
158 | case OPTION_NO_TLS_OPT: |
159 | notlsopt = 1; | |
160 | break; | |
0cf7d72c AM |
161 | |
162 | case OPTION_OLD_PLT: | |
163 | old_plt = 1; | |
164 | break; | |
165 | ||
166 | case OPTION_OLD_GOT: | |
167 | old_got = 1; | |
168 | break; | |
f9e6bfa8 AM |
169 | ' |
170 | ||
c9a2f333 | 171 | # Put these extra ppc32elf routines in ld_${EMULATION_NAME}_emulation |
f9e6bfa8 | 172 | # |
0cf7d72c | 173 | LDEMUL_AFTER_OPEN=ppc_after_open |
f9e6bfa8 | 174 | LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation |