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${EMULATION_NAME}.c <<EOF
28 #include "elf32-hppa.h"
30 static void hppaelf_after_parse PARAMS((void));
31 static void hppaelf_create_output_section_statements PARAMS ((void));
32 static asection *hppaelf_add_stub_section
33 PARAMS ((const char *, asection *));
34 static void hppaelf_layout_sections_again PARAMS ((void));
35 static void gld${EMULATION_NAME}_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 /* Whether we need to call hppa_layout_sections_again. */
47 static int need_laying_out = 0;
49 /* Maximum size of a group of input sections that can be handled by
50 one stub section. A value of +/-1 indicates the bfd back-end
51 should use a suitable default size. */
52 static bfd_signed_vma group_size = 1;
54 /* Stops the linker merging .text sections on a relocatable link,
55 and adds millicode library to the list of input files. */
58 hppaelf_after_parse ()
60 if (link_info.relocateable)
61 lang_add_unique (".text");
62 #if 0 /* enable this once we split millicode stuff from libgcc */
64 lang_add_input_file ("milli",
65 lang_input_file_is_l_enum,
70 /* This is called before the input files are opened. We create a new
71 fake input file to hold the stub sections. */
74 hppaelf_create_output_section_statements ()
76 stub_file = lang_add_input_file ("linker stubs",
77 lang_input_file_is_fake_enum,
79 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
80 if (stub_file->the_bfd == NULL
81 || ! bfd_set_arch_mach (stub_file->the_bfd,
82 bfd_get_arch (output_bfd),
83 bfd_get_mach (output_bfd)))
85 einfo ("%X%P: can not create BFD %E\n");
89 ldlang_add_file (stub_file);
95 lang_statement_list_type add;
96 asection *input_section;
99 /* Traverse the linker tree to find the spot where the stub goes. */
101 static boolean hook_in_stub
102 PARAMS ((struct hook_stub_info *, lang_statement_union_type **));
105 hook_in_stub (info, lp)
106 struct hook_stub_info *info;
107 lang_statement_union_type **lp;
109 lang_statement_union_type *l;
112 for (; (l = *lp) != NULL; lp = &l->header.next)
114 switch (l->header.type)
116 case lang_constructors_statement_enum:
117 ret = hook_in_stub (info, &constructor_list.head);
122 case lang_output_section_statement_enum:
123 ret = hook_in_stub (info,
124 &l->output_section_statement.children.head);
129 case lang_wild_statement_enum:
130 ret = hook_in_stub (info, &l->wild_statement.children.head);
135 case lang_group_statement_enum:
136 ret = hook_in_stub (info, &l->group_statement.children.head);
141 case lang_input_section_enum:
142 if (l->input_section.section == info->input_section)
144 /* We've found our section. Insert the stub immediately
145 before its associated input section. */
146 *lp = info->add.head;
147 *(info->add.tail) = l;
152 case lang_data_statement_enum:
153 case lang_reloc_statement_enum:
154 case lang_object_symbols_statement_enum:
155 case lang_output_statement_enum:
156 case lang_target_statement_enum:
157 case lang_input_statement_enum:
158 case lang_assignment_statement_enum:
159 case lang_padding_statement_enum:
160 case lang_address_statement_enum:
161 case lang_fill_statement_enum:
173 /* Call-back for elf32_hppa_size_stubs. */
175 /* Create a new stub section, and arrange for it to be linked
176 immediately before INPUT_SECTION. */
179 hppaelf_add_stub_section (stub_sec_name, input_section)
180 const char *stub_sec_name;
181 asection *input_section;
185 asection *output_section;
187 lang_output_section_statement_type *os;
188 struct hook_stub_info info;
190 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
191 if (stub_sec == NULL)
194 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
195 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
196 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
199 output_section = input_section->output_section;
200 secname = bfd_get_section_name (output_section->owner, output_section);
201 os = lang_output_section_find (secname);
203 info.input_section = input_section;
204 lang_list_init (&info.add);
205 lang_add_section (&info.add, stub_sec, os, stub_file);
207 if (info.add.head == NULL)
210 if (hook_in_stub (&info, &os->children.head))
214 einfo ("%X%P: can not make stub section: %E\n");
219 /* Another call-back for elf32_hppa_size_stubs. */
222 hppaelf_layout_sections_again ()
224 /* If we have changed sizes of the stub sections, then we need
225 to recalculate all the section offsets. This may mean we need to
226 add even more stubs. */
229 /* Resize the sections. */
230 lang_size_sections (stat_ptr->head, abs_output_section,
231 &stat_ptr->head, 0, (bfd_vma) 0, NULL);
233 /* Redo special stuff. */
234 ldemul_after_allocation ();
236 /* Do the assignments again. */
237 lang_do_assignments (stat_ptr->head, abs_output_section,
238 (fill_type) 0, (bfd_vma) 0);
242 /* Final emulation specific call. For the PA we use this opportunity
243 to build linker stubs. */
246 gld${EMULATION_NAME}_finish ()
248 /* If generating a relocatable output file, then we don't
249 have to examine the relocs. */
250 if (link_info.relocateable)
253 /* bfd_elf32_discard_info just plays with debugging sections,
254 ie. doesn't affect any code, so we can delay resizing the
255 sections. It's likely we'll resize everything in the process of
257 if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info))
260 /* Call into the BFD backend to do the real work. */
261 if (! elf32_hppa_size_stubs (output_bfd,
266 &hppaelf_add_stub_section,
267 &hppaelf_layout_sections_again))
269 einfo ("%X%P: can not size stub section: %E\n");
274 hppaelf_layout_sections_again ();
276 /* Set the global data pointer. */
277 if (! elf32_hppa_set_gp (output_bfd, &link_info))
279 einfo ("%X%P: can not set gp\n");
283 /* Now build the linker stubs. */
284 if (stub_file->the_bfd->sections != NULL)
286 if (! elf32_hppa_build_stubs (&link_info))
287 einfo ("%X%P: can not build stubs: %E\n");
292 /* Avoid processing the fake stub_file in vercheck, stat_needed and
293 check_needed routines. */
295 static void hppa_for_each_input_file_wrapper
296 PARAMS ((lang_input_statement_type *));
297 static void hppa_lang_for_each_input_file
298 PARAMS ((void (*) (lang_input_statement_type *)));
300 static void (*real_func) PARAMS ((lang_input_statement_type *));
302 static void hppa_for_each_input_file_wrapper (l)
303 lang_input_statement_type *l;
310 hppa_lang_for_each_input_file (func)
311 void (*func) PARAMS ((lang_input_statement_type *));
314 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
317 #define lang_for_each_input_file hppa_lang_for_each_input_file
321 # Define some shell vars to insert bits of code into the standard elf
322 # parse_args and list_options functions.
324 PARSE_AND_LIST_PROLOGUE='
325 #define OPTION_MULTI_SUBSPACE 301
326 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
329 # The options are repeated below so that no abbreviations are allowed.
330 # Otherwise -s matches stub-group-size
331 PARSE_AND_LIST_LONGOPTS='
332 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
333 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
334 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
335 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
338 PARSE_AND_LIST_OPTIONS='
340 --multi-subspace Generate import and export stubs to support\n\
341 multiple sub-space shared libraries\n"
344 --stub-group-size=N Maximum size of a group of input sections that can be\n\
345 handled by one stub section. A negative value\n\
346 locates all stubs before their branches (with a\n\
347 group size of -N), while a positive value allows\n\
348 two groups of input sections, one before, and one\n\
349 after each stub section. Values of +/-1 indicate\n\
350 the linker should choose suitable defaults.\n"
354 PARSE_AND_LIST_ARGS_CASES='
355 case OPTION_MULTI_SUBSPACE:
359 case OPTION_STUBGROUP_SIZE:
362 group_size = bfd_scan_vma (optarg, &end, 0);
364 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
369 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
371 LDEMUL_AFTER_PARSE=hppaelf_after_parse
372 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
373 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements