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f9e6bfa8 | 1 | # This shell script emits a C file. -*- C -*- |
f13a99db | 2 | # Copyright 2003, 2005, 2007, 2008 Free Software Foundation, Inc. |
f9e6bfa8 | 3 | # |
f96b4a7b | 4 | # This file is part of the GNU Binutils. |
f9e6bfa8 AM |
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 | |
f96b4a7b | 8 | # the Free Software Foundation; either version 3 of the License, or |
f9e6bfa8 AM |
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 | |
f96b4a7b NC |
18 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | # MA 02110-1301, USA. | |
f9e6bfa8 AM |
20 | # |
21 | ||
c9a2f333 | 22 | # This file is sourced from elf32.em, and defines extra powerpc32-elf |
f9e6bfa8 AM |
23 | # specific routines. |
24 | # | |
92b93329 | 25 | fragment <<EOF |
f9e6bfa8 AM |
26 | |
27 | #include "libbfd.h" | |
28 | #include "elf32-ppc.h" | |
29 | ||
5503fea1 AM |
30 | #define is_ppc_elf(bfd) \ |
31 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
32 | && elf_object_id (bfd) == PPC32_ELF_TDATA) | |
c9a2f333 | 33 | |
f9e6bfa8 AM |
34 | /* Whether to run tls optimization. */ |
35 | static int notlsopt = 0; | |
36 | ||
0ba07910 AM |
37 | /* Whether to emit symbols for stubs. */ |
38 | static int emit_stub_syms = 0; | |
39 | ||
0cf7d72c | 40 | /* Chooses the correct place for .plt and .got. */ |
016687f8 | 41 | static enum ppc_elf_plt_type plt_style = PLT_UNSET; |
0cf7d72c AM |
42 | static int old_got = 0; |
43 | ||
44 | static void | |
45 | ppc_after_open (void) | |
46 | { | |
5503fea1 | 47 | if (is_ppc_elf (link_info.output_bfd)) |
0cf7d72c AM |
48 | { |
49 | int new_plt; | |
50 | int keep_new; | |
51 | unsigned int num_plt; | |
52 | unsigned int num_got; | |
53 | lang_output_section_statement_type *os; | |
54 | lang_output_section_statement_type *plt_os[2]; | |
55 | lang_output_section_statement_type *got_os[2]; | |
56 | ||
0ba07910 | 57 | emit_stub_syms |= link_info.emitrelocations; |
f13a99db AM |
58 | new_plt = ppc_elf_select_plt_layout (link_info.output_bfd, &link_info, |
59 | plt_style, emit_stub_syms); | |
0cf7d72c AM |
60 | if (new_plt < 0) |
61 | einfo ("%X%P: select_plt_layout problem %E\n"); | |
62 | ||
63 | num_got = 0; | |
64 | num_plt = 0; | |
65 | for (os = &lang_output_section_statement.head->output_section_statement; | |
66 | os != NULL; | |
67 | os = os->next) | |
68 | { | |
69 | if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0) | |
70 | { | |
71 | if (num_plt < 2) | |
72 | plt_os[num_plt] = os; | |
73 | ++num_plt; | |
74 | } | |
75 | if (os->constraint == SPECIAL && strcmp (os->name, ".got") == 0) | |
76 | { | |
77 | if (num_got < 2) | |
78 | got_os[num_got] = os; | |
79 | ++num_got; | |
80 | } | |
81 | } | |
82 | ||
83 | keep_new = new_plt == 1 ? 0 : -1; | |
84 | if (num_plt == 2) | |
85 | { | |
86 | plt_os[0]->constraint = keep_new; | |
87 | plt_os[1]->constraint = ~keep_new; | |
88 | } | |
89 | if (num_got == 2) | |
90 | { | |
91 | if (old_got) | |
92 | keep_new = -1; | |
93 | got_os[0]->constraint = keep_new; | |
94 | got_os[1]->constraint = ~keep_new; | |
95 | } | |
96 | } | |
97 | ||
98 | gld${EMULATION_NAME}_after_open (); | |
99 | } | |
100 | ||
f9e6bfa8 | 101 | static void |
7e5d8d48 | 102 | ppc_before_allocation (void) |
f9e6bfa8 | 103 | { |
5503fea1 | 104 | if (is_ppc_elf (link_info.output_bfd)) |
f9e6bfa8 | 105 | { |
f13a99db | 106 | if (ppc_elf_tls_setup (link_info.output_bfd, &link_info) && !notlsopt) |
f9e6bfa8 | 107 | { |
f13a99db | 108 | if (!ppc_elf_tls_optimize (link_info.output_bfd, &link_info)) |
f9e6bfa8 AM |
109 | { |
110 | einfo ("%X%P: TLS problem %E\n"); | |
111 | return; | |
112 | } | |
113 | } | |
114 | } | |
4135c73b | 115 | |
f9e6bfa8 | 116 | gld${EMULATION_NAME}_before_allocation (); |
4135c73b AM |
117 | |
118 | /* Turn on relaxation if executable sections have addresses that | |
119 | might make branches overflow. */ | |
120 | if (!command_line.relax) | |
121 | { | |
122 | bfd_vma low = (bfd_vma) -1; | |
123 | bfd_vma high = 0; | |
124 | asection *o; | |
125 | ||
126 | /* Run lang_size_sections (if not already done). */ | |
127 | if (expld.phase != lang_mark_phase_enum) | |
128 | { | |
129 | expld.phase = lang_mark_phase_enum; | |
130 | expld.dataseg.phase = exp_dataseg_none; | |
131 | one_lang_size_sections_pass (NULL, FALSE); | |
132 | lang_reset_memory_regions (); | |
133 | } | |
134 | ||
135 | for (o = link_info.output_bfd->sections; o != NULL; o = o->next) | |
136 | { | |
137 | if ((o->flags & (SEC_ALLOC | SEC_CODE)) != (SEC_ALLOC | SEC_CODE)) | |
138 | continue; | |
07088e95 | 139 | if (o->rawsize == 0) |
4135c73b AM |
140 | continue; |
141 | if (low > o->vma) | |
142 | low = o->vma; | |
07088e95 AM |
143 | if (high < o->vma + o->rawsize - 1) |
144 | high = o->vma + o->rawsize - 1; | |
4135c73b AM |
145 | } |
146 | if (high > low && high - low > (1 << 25) - 1) | |
147 | command_line.relax = TRUE; | |
148 | } | |
f9e6bfa8 AM |
149 | } |
150 | ||
151 | EOF | |
152 | ||
dc27aea4 | 153 | if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then |
92b93329 | 154 | fragment <<EOF |
dc27aea4 AM |
155 | /* Special handling for embedded SPU executables. */ |
156 | extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *); | |
157 | static bfd_boolean gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *); | |
158 | ||
159 | static bfd_boolean | |
160 | ppc_recognized_file (lang_input_statement_type *entry) | |
161 | { | |
162 | if (embedded_spu_file (entry, "-m32")) | |
163 | return TRUE; | |
164 | ||
165 | return gld${EMULATION_NAME}_load_symbols (entry); | |
166 | } | |
167 | ||
168 | EOF | |
169 | LDEMUL_RECOGNIZED_FILE=ppc_recognized_file | |
170 | fi | |
171 | ||
f9e6bfa8 AM |
172 | # Define some shell vars to insert bits of code into the standard elf |
173 | # parse_args and list_options functions. | |
174 | # | |
175 | PARSE_AND_LIST_PROLOGUE=' | |
176 | #define OPTION_NO_TLS_OPT 301 | |
016687f8 AM |
177 | #define OPTION_NEW_PLT 302 |
178 | #define OPTION_OLD_PLT 303 | |
179 | #define OPTION_OLD_GOT 304 | |
180 | #define OPTION_STUBSYMS 305 | |
f9e6bfa8 AM |
181 | ' |
182 | ||
f9e6bfa8 | 183 | PARSE_AND_LIST_LONGOPTS=' |
0ba07910 | 184 | { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS }, |
f9e6bfa8 | 185 | { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT }, |
016687f8 | 186 | { "secure-plt", no_argument, NULL, OPTION_NEW_PLT }, |
0cf7d72c AM |
187 | { "bss-plt", no_argument, NULL, OPTION_OLD_PLT }, |
188 | { "sdata-got", no_argument, NULL, OPTION_OLD_GOT }, | |
f9e6bfa8 AM |
189 | ' |
190 | ||
191 | PARSE_AND_LIST_OPTIONS=' | |
192 | fprintf (file, _("\ | |
442996ee AM |
193 | --emit-stub-syms Label linker stubs with a symbol.\n\ |
194 | --no-tls-optimize Don'\''t try to optimize TLS accesses.\n\ | |
195 | --secure-plt Use new-style PLT if possible.\n\ | |
196 | --bss-plt Force old-style BSS PLT.\n\ | |
197 | --sdata-got Force GOT location just before .sdata.\n" | |
f9e6bfa8 AM |
198 | )); |
199 | ' | |
200 | ||
201 | PARSE_AND_LIST_ARGS_CASES=' | |
0ba07910 AM |
202 | case OPTION_STUBSYMS: |
203 | emit_stub_syms = 1; | |
204 | break; | |
205 | ||
f9e6bfa8 AM |
206 | case OPTION_NO_TLS_OPT: |
207 | notlsopt = 1; | |
208 | break; | |
0cf7d72c | 209 | |
016687f8 AM |
210 | case OPTION_NEW_PLT: |
211 | plt_style = PLT_NEW; | |
212 | break; | |
213 | ||
0cf7d72c | 214 | case OPTION_OLD_PLT: |
016687f8 | 215 | plt_style = PLT_OLD; |
0cf7d72c AM |
216 | break; |
217 | ||
218 | case OPTION_OLD_GOT: | |
219 | old_got = 1; | |
220 | break; | |
f9e6bfa8 AM |
221 | ' |
222 | ||
c9a2f333 | 223 | # Put these extra ppc32elf routines in ld_${EMULATION_NAME}_emulation |
f9e6bfa8 | 224 | # |
0cf7d72c | 225 | LDEMUL_AFTER_OPEN=ppc_after_open |
f9e6bfa8 | 226 | LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation |