1 # This shell script emits a C file. -*- C -*-
2 # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002
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${EMULATION_NAME}.c <<EOF
28 #include "elf32-hppa.h"
30 static void hppaelf_after_parse PARAMS((void));
31 static void hppaelf_create_output_section_statements PARAMS ((void));
32 static asection *hppaelf_add_stub_section
33 PARAMS ((const char *, asection *));
34 static void hppaelf_layout_sections_again PARAMS ((void));
35 static void gld${EMULATION_NAME}_finish PARAMS ((void));
36 static void build_section_lists PARAMS ((lang_statement_union_type *));
39 /* Fake input file for stubs. */
40 static lang_input_statement_type *stub_file;
42 /* Type of import/export stubs to build. For a single sub-space model,
43 we can build smaller import stubs and there is no need for export
45 static int multi_subspace = 0;
47 /* Whether we need to call hppa_layout_sections_again. */
48 static int need_laying_out = 0;
50 /* Maximum size of a group of input sections that can be handled by
51 one stub section. A value of +/-1 indicates the bfd back-end
52 should use a suitable default size. */
53 static bfd_signed_vma group_size = 1;
55 /* Stops the linker merging .text sections on a relocatable link,
56 and adds millicode library to the list of input files. */
59 hppaelf_after_parse ()
61 if (link_info.relocateable)
62 lang_add_unique (".text");
63 #if 0 /* enable this once we split millicode stuff from libgcc */
65 lang_add_input_file ("milli",
66 lang_input_file_is_l_enum,
71 /* This is called before the input files are opened. We create a new
72 fake input file to hold the stub sections. */
75 hppaelf_create_output_section_statements ()
77 stub_file = lang_add_input_file ("linker stubs",
78 lang_input_file_is_fake_enum,
80 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
81 if (stub_file->the_bfd == NULL
82 || ! bfd_set_arch_mach (stub_file->the_bfd,
83 bfd_get_arch (output_bfd),
84 bfd_get_mach (output_bfd)))
86 einfo ("%X%P: can not create BFD %E\n");
90 ldlang_add_file (stub_file);
96 lang_statement_list_type add;
97 asection *input_section;
100 /* Traverse the linker tree to find the spot where the stub goes. */
102 static boolean hook_in_stub
103 PARAMS ((struct hook_stub_info *, lang_statement_union_type **));
106 hook_in_stub (info, lp)
107 struct hook_stub_info *info;
108 lang_statement_union_type **lp;
110 lang_statement_union_type *l;
113 for (; (l = *lp) != NULL; lp = &l->header.next)
115 switch (l->header.type)
117 case lang_constructors_statement_enum:
118 ret = hook_in_stub (info, &constructor_list.head);
123 case lang_output_section_statement_enum:
124 ret = hook_in_stub (info,
125 &l->output_section_statement.children.head);
130 case lang_wild_statement_enum:
131 ret = hook_in_stub (info, &l->wild_statement.children.head);
136 case lang_group_statement_enum:
137 ret = hook_in_stub (info, &l->group_statement.children.head);
142 case lang_input_section_enum:
143 if (l->input_section.section == info->input_section)
145 /* We've found our section. Insert the stub immediately
146 before its associated input section. */
147 *lp = info->add.head;
148 *(info->add.tail) = l;
153 case lang_data_statement_enum:
154 case lang_reloc_statement_enum:
155 case lang_object_symbols_statement_enum:
156 case lang_output_statement_enum:
157 case lang_target_statement_enum:
158 case lang_input_statement_enum:
159 case lang_assignment_statement_enum:
160 case lang_padding_statement_enum:
161 case lang_address_statement_enum:
162 case lang_fill_statement_enum:
174 /* Call-back for elf32_hppa_size_stubs. */
176 /* Create a new stub section, and arrange for it to be linked
177 immediately before INPUT_SECTION. */
180 hppaelf_add_stub_section (stub_sec_name, input_section)
181 const char *stub_sec_name;
182 asection *input_section;
186 asection *output_section;
188 lang_output_section_statement_type *os;
189 struct hook_stub_info info;
191 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
192 if (stub_sec == NULL)
195 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
196 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
197 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
200 output_section = input_section->output_section;
201 secname = bfd_get_section_name (output_section->owner, output_section);
202 os = lang_output_section_find (secname);
204 info.input_section = input_section;
205 lang_list_init (&info.add);
206 lang_add_section (&info.add, stub_sec, os, stub_file);
208 if (info.add.head == NULL)
211 if (hook_in_stub (&info, &os->children.head))
215 einfo ("%X%P: can not make stub section: %E\n");
220 /* Another call-back for elf32_hppa_size_stubs. */
223 hppaelf_layout_sections_again ()
225 /* If we have changed sizes of the stub sections, then we need
226 to recalculate all the section offsets. This may mean we need to
227 add even more stubs. */
230 lang_reset_memory_regions ();
232 /* Resize the sections. */
233 lang_size_sections (stat_ptr->head, abs_output_section,
234 &stat_ptr->head, 0, (bfd_vma) 0, NULL);
236 /* Redo special stuff. */
237 ldemul_after_allocation ();
239 /* Do the assignments again. */
240 lang_do_assignments (stat_ptr->head, abs_output_section,
241 (fill_type *) 0, (bfd_vma) 0);
246 build_section_lists (statement)
247 lang_statement_union_type *statement;
249 if (statement->header.type == lang_input_section_enum
250 && !statement->input_section.ifile->just_syms_flag
251 && statement->input_section.section->output_section != NULL
252 && statement->input_section.section->output_section->owner == output_bfd)
254 elf32_hppa_next_input_section (&link_info,
255 statement->input_section.section);
260 /* Final emulation specific call. For the PA we use this opportunity
261 to build linker stubs. */
264 gld${EMULATION_NAME}_finish ()
268 /* If generating a relocatable output file, then we don't
269 have to examine the relocs. */
270 if (link_info.relocateable)
273 /* bfd_elf32_discard_info just plays with debugging sections,
274 ie. doesn't affect any code, so we can delay resizing the
275 sections. It's likely we'll resize everything in the process of
277 if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info))
280 ret = elf32_hppa_setup_section_lists (output_bfd, &link_info);
285 einfo ("%X%P: can not size stub section: %E\n");
289 lang_for_each_statement (build_section_lists);
291 /* Call into the BFD backend to do the real work. */
292 if (! elf32_hppa_size_stubs (output_bfd,
297 &hppaelf_add_stub_section,
298 &hppaelf_layout_sections_again))
300 einfo ("%X%P: can not size stub section: %E\n");
306 hppaelf_layout_sections_again ();
308 /* Set the global data pointer. */
309 if (! elf32_hppa_set_gp (output_bfd, &link_info))
311 einfo ("%X%P: can not set gp\n");
315 /* Now build the linker stubs. */
316 if (stub_file->the_bfd->sections != NULL)
318 if (! elf32_hppa_build_stubs (&link_info))
319 einfo ("%X%P: can not build stubs: %E\n");
324 /* Avoid processing the fake stub_file in vercheck, stat_needed and
325 check_needed routines. */
327 static void hppa_for_each_input_file_wrapper
328 PARAMS ((lang_input_statement_type *));
329 static void hppa_lang_for_each_input_file
330 PARAMS ((void (*) (lang_input_statement_type *)));
332 static void (*real_func) PARAMS ((lang_input_statement_type *));
334 static void hppa_for_each_input_file_wrapper (l)
335 lang_input_statement_type *l;
342 hppa_lang_for_each_input_file (func)
343 void (*func) PARAMS ((lang_input_statement_type *));
346 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
349 #define lang_for_each_input_file hppa_lang_for_each_input_file
353 # Define some shell vars to insert bits of code into the standard elf
354 # parse_args and list_options functions.
356 PARSE_AND_LIST_PROLOGUE='
357 #define OPTION_MULTI_SUBSPACE 301
358 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
361 # The options are repeated below so that no abbreviations are allowed.
362 # Otherwise -s matches stub-group-size
363 PARSE_AND_LIST_LONGOPTS='
364 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
365 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
366 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
367 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
370 PARSE_AND_LIST_OPTIONS='
372 --multi-subspace Generate import and export stubs to support\n\
373 multiple sub-space shared libraries\n"
376 --stub-group-size=N Maximum size of a group of input sections that can be\n\
377 handled by one stub section. A negative value\n\
378 locates all stubs before their branches (with a\n\
379 group size of -N), while a positive value allows\n\
380 two groups of input sections, one before, and one\n\
381 after each stub section. Values of +/-1 indicate\n\
382 the linker should choose suitable defaults.\n"
386 PARSE_AND_LIST_ARGS_CASES='
387 case OPTION_MULTI_SUBSPACE:
391 case OPTION_STUBGROUP_SIZE:
394 group_size = bfd_scan_vma (optarg, &end, 0);
396 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
401 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
403 LDEMUL_AFTER_PARSE=hppaelf_after_parse
404 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
405 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements