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f9e6bfa8 | 1 | # This shell script emits a C file. -*- C -*- |
f05eb3b7 | 2 | # Copyright 2003, 2005, 2007, 2008, 2009, 2010, 2011, 2012 |
58d180e8 | 3 | # Free Software Foundation, Inc. |
f9e6bfa8 | 4 | # |
f96b4a7b | 5 | # This file is part of the GNU Binutils. |
f9e6bfa8 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 |
f9e6bfa8 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. | |
f9e6bfa8 AM |
21 | # |
22 | ||
c9a2f333 | 23 | # This file is sourced from elf32.em, and defines extra powerpc32-elf |
f9e6bfa8 AM |
24 | # specific routines. |
25 | # | |
92b93329 | 26 | fragment <<EOF |
f9e6bfa8 AM |
27 | |
28 | #include "libbfd.h" | |
29 | #include "elf32-ppc.h" | |
f05eb3b7 | 30 | #include "ldlex.h" |
f9e6bfa8 | 31 | |
5503fea1 AM |
32 | #define is_ppc_elf(bfd) \ |
33 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
4dfe6ac6 | 34 | && elf_object_id (bfd) == PPC32_ELF_DATA) |
c9a2f333 | 35 | |
f9e6bfa8 AM |
36 | /* Whether to run tls optimization. */ |
37 | static int notlsopt = 0; | |
38 | ||
5446cbdf | 39 | /* Choose the correct place for .got. */ |
0cf7d72c AM |
40 | static int old_got = 0; |
41 | ||
5446cbdf AM |
42 | static struct ppc_elf_params params = { PLT_UNSET, -1, 0, 0, 0, 0 }; |
43 | ||
44 | static void | |
45 | ppc_after_open_output (void) | |
46 | { | |
47 | if (params.emit_stub_syms < 0) | |
48 | params.emit_stub_syms = link_info.emitrelocations || link_info.shared; | |
49 | if (params.pagesize == 0) | |
50 | params.pagesize = config.commonpagesize; | |
51 | if (link_info.relocatable) | |
52 | params.ppc476_workaround = 0; | |
53 | ppc_elf_link_params (&link_info, ¶ms); | |
54 | } | |
55 | ||
0cf7d72c AM |
56 | static void |
57 | ppc_after_open (void) | |
58 | { | |
5503fea1 | 59 | if (is_ppc_elf (link_info.output_bfd)) |
0cf7d72c AM |
60 | { |
61 | int new_plt; | |
62 | int keep_new; | |
63 | unsigned int num_plt; | |
64 | unsigned int num_got; | |
65 | lang_output_section_statement_type *os; | |
66 | lang_output_section_statement_type *plt_os[2]; | |
67 | lang_output_section_statement_type *got_os[2]; | |
68 | ||
5446cbdf | 69 | new_plt = ppc_elf_select_plt_layout (link_info.output_bfd, &link_info); |
0cf7d72c AM |
70 | if (new_plt < 0) |
71 | einfo ("%X%P: select_plt_layout problem %E\n"); | |
72 | ||
73 | num_got = 0; | |
74 | num_plt = 0; | |
75 | for (os = &lang_output_section_statement.head->output_section_statement; | |
76 | os != NULL; | |
77 | os = os->next) | |
78 | { | |
79 | if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0) | |
80 | { | |
81 | if (num_plt < 2) | |
82 | plt_os[num_plt] = os; | |
83 | ++num_plt; | |
84 | } | |
85 | if (os->constraint == SPECIAL && strcmp (os->name, ".got") == 0) | |
86 | { | |
87 | if (num_got < 2) | |
88 | got_os[num_got] = os; | |
89 | ++num_got; | |
90 | } | |
91 | } | |
92 | ||
93 | keep_new = new_plt == 1 ? 0 : -1; | |
94 | if (num_plt == 2) | |
95 | { | |
96 | plt_os[0]->constraint = keep_new; | |
97 | plt_os[1]->constraint = ~keep_new; | |
98 | } | |
99 | if (num_got == 2) | |
100 | { | |
101 | if (old_got) | |
102 | keep_new = -1; | |
103 | got_os[0]->constraint = keep_new; | |
104 | got_os[1]->constraint = ~keep_new; | |
105 | } | |
106 | } | |
107 | ||
108 | gld${EMULATION_NAME}_after_open (); | |
109 | } | |
110 | ||
f9e6bfa8 | 111 | static void |
7e5d8d48 | 112 | ppc_before_allocation (void) |
f9e6bfa8 | 113 | { |
5503fea1 | 114 | if (is_ppc_elf (link_info.output_bfd)) |
f9e6bfa8 | 115 | { |
5446cbdf | 116 | if (ppc_elf_tls_setup (link_info.output_bfd, &link_info) |
a7f2871e | 117 | && !notlsopt) |
f9e6bfa8 | 118 | { |
f13a99db | 119 | if (!ppc_elf_tls_optimize (link_info.output_bfd, &link_info)) |
f9e6bfa8 AM |
120 | { |
121 | einfo ("%X%P: TLS problem %E\n"); | |
122 | return; | |
123 | } | |
124 | } | |
125 | } | |
4135c73b | 126 | |
f9e6bfa8 | 127 | gld${EMULATION_NAME}_before_allocation (); |
4135c73b | 128 | |
5446cbdf AM |
129 | if (RELAXATION_ENABLED) |
130 | params.branch_trampolines = 1; | |
131 | ||
4135c73b AM |
132 | /* Turn on relaxation if executable sections have addresses that |
133 | might make branches overflow. */ | |
5446cbdf | 134 | else if (!RELAXATION_DISABLED_BY_USER) |
4135c73b AM |
135 | { |
136 | bfd_vma low = (bfd_vma) -1; | |
137 | bfd_vma high = 0; | |
138 | asection *o; | |
139 | ||
140 | /* Run lang_size_sections (if not already done). */ | |
141 | if (expld.phase != lang_mark_phase_enum) | |
142 | { | |
143 | expld.phase = lang_mark_phase_enum; | |
144 | expld.dataseg.phase = exp_dataseg_none; | |
145 | one_lang_size_sections_pass (NULL, FALSE); | |
146 | lang_reset_memory_regions (); | |
147 | } | |
148 | ||
149 | for (o = link_info.output_bfd->sections; o != NULL; o = o->next) | |
150 | { | |
151 | if ((o->flags & (SEC_ALLOC | SEC_CODE)) != (SEC_ALLOC | SEC_CODE)) | |
152 | continue; | |
07088e95 | 153 | if (o->rawsize == 0) |
4135c73b AM |
154 | continue; |
155 | if (low > o->vma) | |
156 | low = o->vma; | |
07088e95 AM |
157 | if (high < o->vma + o->rawsize - 1) |
158 | high = o->vma + o->rawsize - 1; | |
4135c73b AM |
159 | } |
160 | if (high > low && high - low > (1 << 25) - 1) | |
5446cbdf | 161 | params.branch_trampolines = 1; |
4135c73b | 162 | } |
5446cbdf AM |
163 | |
164 | if (params.ppc476_workaround || params.branch_trampolines) | |
165 | ENABLE_RELAXATION; | |
f9e6bfa8 AM |
166 | } |
167 | ||
168 | EOF | |
169 | ||
dc27aea4 | 170 | if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then |
92b93329 | 171 | fragment <<EOF |
dc27aea4 AM |
172 | /* Special handling for embedded SPU executables. */ |
173 | extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *); | |
174 | static bfd_boolean gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *); | |
175 | ||
176 | static bfd_boolean | |
177 | ppc_recognized_file (lang_input_statement_type *entry) | |
178 | { | |
179 | if (embedded_spu_file (entry, "-m32")) | |
180 | return TRUE; | |
181 | ||
182 | return gld${EMULATION_NAME}_load_symbols (entry); | |
183 | } | |
184 | ||
185 | EOF | |
186 | LDEMUL_RECOGNIZED_FILE=ppc_recognized_file | |
187 | fi | |
188 | ||
f9e6bfa8 AM |
189 | # Define some shell vars to insert bits of code into the standard elf |
190 | # parse_args and list_options functions. | |
191 | # | |
58d180e8 AM |
192 | PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}' |
193 | #define OPTION_NO_TLS_OPT 321 | |
a7f2871e AM |
194 | #define OPTION_NO_TLS_GET_ADDR_OPT (OPTION_NO_TLS_OPT + 1) |
195 | #define OPTION_NEW_PLT (OPTION_NO_TLS_GET_ADDR_OPT + 1) | |
196 | #define OPTION_OLD_PLT (OPTION_NEW_PLT + 1) | |
197 | #define OPTION_OLD_GOT (OPTION_OLD_PLT + 1) | |
198 | #define OPTION_STUBSYMS (OPTION_OLD_GOT + 1) | |
b02c4cfa | 199 | #define OPTION_NO_STUBSYMS (OPTION_STUBSYMS + 1) |
5446cbdf AM |
200 | #define OPTION_PPC476_WORKAROUND (OPTION_NO_STUBSYMS + 1) |
201 | #define OPTION_NO_PPC476_WORKAROUND (OPTION_PPC476_WORKAROUND + 1) | |
f9e6bfa8 AM |
202 | ' |
203 | ||
58d180e8 | 204 | PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}' |
0ba07910 | 205 | { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS }, |
b02c4cfa | 206 | { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS }, |
f9e6bfa8 | 207 | { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT }, |
a7f2871e | 208 | { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT }, |
016687f8 | 209 | { "secure-plt", no_argument, NULL, OPTION_NEW_PLT }, |
0cf7d72c AM |
210 | { "bss-plt", no_argument, NULL, OPTION_OLD_PLT }, |
211 | { "sdata-got", no_argument, NULL, OPTION_OLD_GOT }, | |
5446cbdf AM |
212 | { "ppc476-workaround", optional_argument, NULL, OPTION_PPC476_WORKAROUND }, |
213 | { "no-ppc476-workaround", no_argument, NULL, OPTION_NO_PPC476_WORKAROUND }, | |
f9e6bfa8 AM |
214 | ' |
215 | ||
58d180e8 | 216 | PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}' |
f9e6bfa8 | 217 | fprintf (file, _("\ |
442996ee | 218 | --emit-stub-syms Label linker stubs with a symbol.\n\ |
b02c4cfa | 219 | --no-emit-stub-syms Don'\''t label linker stubs with a symbol.\n\ |
442996ee | 220 | --no-tls-optimize Don'\''t try to optimize TLS accesses.\n\ |
a7f2871e | 221 | --no-tls-get-addr-optimize Don'\''t use a special __tls_get_addr call.\n\ |
442996ee AM |
222 | --secure-plt Use new-style PLT if possible.\n\ |
223 | --bss-plt Force old-style BSS PLT.\n\ | |
5446cbdf AM |
224 | --sdata-got Force GOT location just before .sdata.\n\ |
225 | --ppc476-workaround [=pagesize]\n\ | |
226 | Avoid a cache bug on ppc476.\n\ | |
227 | --no-ppc476-workaround Disable workaround.\n" | |
f9e6bfa8 AM |
228 | )); |
229 | ' | |
230 | ||
58d180e8 | 231 | PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}' |
0ba07910 | 232 | case OPTION_STUBSYMS: |
5446cbdf | 233 | params.emit_stub_syms = 1; |
0ba07910 AM |
234 | break; |
235 | ||
b02c4cfa | 236 | case OPTION_NO_STUBSYMS: |
5446cbdf | 237 | params.emit_stub_syms = 0; |
b02c4cfa AM |
238 | break; |
239 | ||
f9e6bfa8 AM |
240 | case OPTION_NO_TLS_OPT: |
241 | notlsopt = 1; | |
242 | break; | |
0cf7d72c | 243 | |
a7f2871e | 244 | case OPTION_NO_TLS_GET_ADDR_OPT: |
5446cbdf | 245 | params.no_tls_get_addr_opt = 1; |
a7f2871e AM |
246 | break; |
247 | ||
016687f8 | 248 | case OPTION_NEW_PLT: |
5446cbdf | 249 | params.plt_style = PLT_NEW; |
016687f8 AM |
250 | break; |
251 | ||
0cf7d72c | 252 | case OPTION_OLD_PLT: |
5446cbdf | 253 | params.plt_style = PLT_OLD; |
0cf7d72c AM |
254 | break; |
255 | ||
256 | case OPTION_OLD_GOT: | |
257 | old_got = 1; | |
258 | break; | |
f05eb3b7 AM |
259 | |
260 | case OPTION_TRADITIONAL_FORMAT: | |
261 | notlsopt = 1; | |
5446cbdf | 262 | params.no_tls_get_addr_opt = 1; |
f05eb3b7 | 263 | return FALSE; |
5446cbdf AM |
264 | |
265 | case OPTION_PPC476_WORKAROUND: | |
266 | params.ppc476_workaround = 1; | |
267 | if (optarg != NULL) | |
268 | { | |
269 | char *end; | |
270 | params.pagesize = strtoul (optarg, &end, 0); | |
271 | if (*end | |
272 | || (params.pagesize < 4096 && params.pagesize != 0) | |
273 | || params.pagesize != (params.pagesize & -params.pagesize)) | |
274 | einfo (_("%P%F: invalid pagesize `%s'\''\n"), optarg); | |
275 | } | |
276 | break; | |
277 | ||
278 | case OPTION_NO_PPC476_WORKAROUND: | |
279 | params.ppc476_workaround = 0; | |
280 | break; | |
f9e6bfa8 AM |
281 | ' |
282 | ||
c9a2f333 | 283 | # Put these extra ppc32elf routines in ld_${EMULATION_NAME}_emulation |
f9e6bfa8 | 284 | # |
5446cbdf | 285 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_after_open_output |
0cf7d72c | 286 | LDEMUL_AFTER_OPEN=ppc_after_open |
f9e6bfa8 | 287 | LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation |