1 # This shell script emits a C file. -*- C -*-
2 # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001
3 # Free Software Foundation, Inc.
5 # This file is part of GLD, the Gnu Linker.
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
9 # the Free Software Foundation; either version 2 of the License, or
10 # (at your option) any later version.
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.
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
19 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 # This file is sourced from elf32.em, and defines extra hppa-elf
25 cat >>e${EMULATION_NAME}.c <<EOF
28 #include "elf32-hppa.h"
30 static void hppaelf_after_parse PARAMS((void));
31 static void hppaelf_create_output_section_statements PARAMS ((void));
32 static asection *hppaelf_add_stub_section
33 PARAMS ((const char *, asection *));
34 static void hppaelf_layaout_sections_again PARAMS ((void));
35 static void hppaelf_finish PARAMS ((void));
38 /* Fake input file for stubs. */
39 static lang_input_statement_type *stub_file;
41 /* Type of import/export stubs to build. For a single sub-space model,
42 we can build smaller import stubs and there is no need for export
44 static int multi_subspace = 0;
46 /* Maximum size of a group of input sections that can be handled by
47 one stub section. A value of +/-1 indicates the bfd back-end
48 should use a suitable default size. */
49 static bfd_signed_vma group_size = 1;
51 /* Stops the linker merging .text sections on a relocatable link,
52 and adds millicode library to the list of input files. */
55 hppaelf_after_parse ()
57 if (link_info.relocateable)
58 lang_add_unique (".text");
59 #if 0 /* enable this once we split millicode stuff from libgcc */
61 lang_add_input_file ("milli",
62 lang_input_file_is_l_enum,
67 /* This is called before the input files are opened. We create a new
68 fake input file to hold the stub sections. */
71 hppaelf_create_output_section_statements ()
73 stub_file = lang_add_input_file ("linker stubs",
74 lang_input_file_is_fake_enum,
76 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
77 if (stub_file->the_bfd == NULL
78 || ! bfd_set_arch_mach (stub_file->the_bfd,
79 bfd_get_arch (output_bfd),
80 bfd_get_mach (output_bfd)))
82 einfo ("%X%P: can not create BFD %E\n");
86 ldlang_add_file (stub_file);
92 lang_statement_list_type add;
93 asection *input_section;
96 /* Traverse the linker tree to find the spot where the stub goes. */
98 static boolean hook_in_stub
99 PARAMS ((struct hook_stub_info *, lang_statement_union_type **));
102 hook_in_stub (info, lp)
103 struct hook_stub_info *info;
104 lang_statement_union_type **lp;
106 lang_statement_union_type *l;
109 for (; (l = *lp) != NULL; lp = &l->next)
111 switch (l->header.type)
113 case lang_constructors_statement_enum:
114 ret = hook_in_stub (info, &constructor_list.head);
119 case lang_output_section_statement_enum:
120 ret = hook_in_stub (info,
121 &l->output_section_statement.children.head);
126 case lang_wild_statement_enum:
127 ret = hook_in_stub (info, &l->wild_statement.children.head);
132 case lang_group_statement_enum:
133 ret = hook_in_stub (info, &l->group_statement.children.head);
138 case lang_input_section_enum:
139 if (l->input_section.section == info->input_section)
141 /* We've found our section. Insert the stub immediately
142 before its associated input section. */
143 *lp = info->add.head;
144 *(info->add.tail) = l;
149 case lang_data_statement_enum:
150 case lang_reloc_statement_enum:
151 case lang_object_symbols_statement_enum:
152 case lang_output_statement_enum:
153 case lang_target_statement_enum:
154 case lang_input_statement_enum:
155 case lang_assignment_statement_enum:
156 case lang_padding_statement_enum:
157 case lang_address_statement_enum:
158 case lang_fill_statement_enum:
170 /* Call-back for elf32_hppa_size_stubs. */
172 /* Create a new stub section, and arrange for it to be linked
173 immediately before INPUT_SECTION. */
176 hppaelf_add_stub_section (stub_sec_name, input_section)
177 const char *stub_sec_name;
178 asection *input_section;
182 asection *output_section;
184 lang_output_section_statement_type *os;
185 struct hook_stub_info info;
187 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
188 if (stub_sec == NULL)
191 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
192 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
193 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
196 output_section = input_section->output_section;
197 secname = bfd_get_section_name (output_section->owner, output_section);
198 os = lang_output_section_find (secname);
200 info.input_section = input_section;
201 lang_list_init (&info.add);
202 lang_add_section (&info.add, stub_sec, os, stub_file);
204 if (info.add.head == NULL)
207 if (hook_in_stub (&info, &os->children.head))
211 einfo ("%X%P: can not make stub section: %E\n");
216 /* Another call-back for elf32_hppa_size_stubs. */
219 hppaelf_layaout_sections_again ()
221 /* If we have changed sizes of the stub sections, then we need
222 to recalculate all the section offsets. This may mean we need to
223 add even more stubs. */
225 /* Resize the sections. */
226 lang_size_sections (stat_ptr->head, abs_output_section,
227 &stat_ptr->head, 0, (bfd_vma) 0, false);
229 /* Redo special stuff. */
230 ldemul_after_allocation ();
232 /* Do the assignments again. */
233 lang_do_assignments (stat_ptr->head, abs_output_section,
234 (fill_type) 0, (bfd_vma) 0);
238 /* Final emulation specific call. For the PA we use this opportunity
239 to build linker stubs. */
244 /* If generating a relocatable output file, then we don't
245 have to examine the relocs. */
246 if (link_info.relocateable)
249 /* Call into the BFD backend to do the real work. */
250 if (! elf32_hppa_size_stubs (output_bfd,
255 &hppaelf_add_stub_section,
256 &hppaelf_layaout_sections_again))
258 einfo ("%X%P: can not size stub section: %E\n");
262 /* Set the global data pointer. */
263 if (! elf32_hppa_set_gp (output_bfd, &link_info))
265 einfo ("%X%P: can not set gp\n");
269 /* Now build the linker stubs. */
270 if (stub_file->the_bfd->sections != NULL)
272 if (! elf32_hppa_build_stubs (&link_info))
273 einfo ("%X%P: can not build stubs: %E\n");
278 /* Avoid processing the fake stub_file in vercheck, stat_needed and
279 check_needed routines. */
281 static void hppa_for_each_input_file_wrapper
282 PARAMS ((lang_input_statement_type *));
283 static void hppa_lang_for_each_input_file
284 PARAMS ((void (*) (lang_input_statement_type *)));
286 static void (*real_func) PARAMS ((lang_input_statement_type *));
288 static void hppa_for_each_input_file_wrapper (l)
289 lang_input_statement_type *l;
296 hppa_lang_for_each_input_file (func)
297 void (*func) PARAMS ((lang_input_statement_type *));
300 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
303 #define lang_for_each_input_file hppa_lang_for_each_input_file
307 # Define some shell vars to insert bits of code into the standard elf
308 # parse_args and list_options functions.
310 PARSE_AND_LIST_PROLOGUE='
311 #define OPTION_MULTI_SUBSPACE 301
312 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
315 # The options are repeated below so that no abbreviations are allowed.
316 # Otherwise -s matches stub-group-size
317 PARSE_AND_LIST_LONGOPTS='
318 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
319 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
320 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
321 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
324 PARSE_AND_LIST_OPTIONS='
326 --multi-subspace Generate import and export stubs to support\n\
327 multiple sub-space shared libraries\n"
330 --stub-group-size=N Maximum size of a group of input sections that can be\n\
331 handled by one stub section. A negative value\n\
332 locates all stubs before their branches (with a\n\
333 group size of -N), while a positive value allows\n\
334 two groups of input sections, one before, and one\n\
335 after each stub section. Values of +/-1 indicate\n\
336 the linker should choose suitable defaults."
340 PARSE_AND_LIST_ARGS_CASES='
341 case OPTION_MULTI_SUBSPACE:
345 case OPTION_STUBGROUP_SIZE:
348 group_size = bfd_scan_vma (optarg, &end, 0);
350 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
355 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
357 LDEMUL_AFTER_PARSE=hppaelf_after_parse
358 LDEMUL_FINISH=hppaelf_finish
359 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements