1 # This shell script emits a C file. -*- C -*-
2 # Copyright (C) 1991, 93, 94, 95, 97, 99, 2000
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_set_output_arch PARAMS ((void));
31 static void hppaelf_create_output_section_statements PARAMS ((void));
32 static void hppaelf_delete_padding_statements
33 PARAMS ((lang_statement_list_type *));
34 static asection *hppaelf_add_stub_section
35 PARAMS ((const char *, asection *));
36 static void hppaelf_layaout_sections_again PARAMS ((void));
37 static void hppaelf_finish PARAMS ((void));
40 /* Fake input file for stubs. */
41 static lang_input_statement_type *stub_file;
44 /* Set the output architecture and machine. */
47 hppaelf_set_output_arch ()
49 unsigned long machine = 0;
51 bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine);
54 /* This is called before the input files are opened. We create a new
55 fake input file to hold the stub sections. */
58 hppaelf_create_output_section_statements ()
60 stub_file = lang_add_input_file ("linker stubs",
61 lang_input_file_is_fake_enum,
63 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
64 if (stub_file->the_bfd == NULL
65 || ! bfd_set_arch_mach (stub_file->the_bfd,
66 bfd_get_arch (output_bfd),
67 bfd_get_mach (output_bfd)))
69 einfo ("%X%P: can not create BFD %E\n");
73 ldlang_add_file (stub_file);
76 /* Walk all the lang statements splicing out any padding statements from
80 hppaelf_delete_padding_statements (list)
81 lang_statement_list_type *list;
83 lang_statement_union_type *s;
84 lang_statement_union_type **ps;
85 for (ps = &list->head; (s = *ps) != NULL; ps = &s->next)
87 switch (s->header.type)
90 /* We want to recursively walk these sections. */
91 case lang_constructors_statement_enum:
92 hppaelf_delete_padding_statements (&constructor_list);
95 case lang_output_section_statement_enum:
96 hppaelf_delete_padding_statements (&s->output_section_statement.children);
99 case lang_group_statement_enum:
100 hppaelf_delete_padding_statements (&s->group_statement.children);
103 case lang_wild_statement_enum:
104 hppaelf_delete_padding_statements (&s->wild_statement.children);
107 /* Here's what we are really looking for. Splice these out of
109 case lang_padding_statement_enum:
115 /* We don't care about these cases. */
116 case lang_data_statement_enum:
117 case lang_object_symbols_statement_enum:
118 case lang_output_statement_enum:
119 case lang_target_statement_enum:
120 case lang_input_section_enum:
121 case lang_input_statement_enum:
122 case lang_assignment_statement_enum:
123 case lang_address_statement_enum:
134 struct hook_stub_info
136 lang_statement_list_type add;
137 asection *input_section;
140 /* Traverse the linker tree to find the spot where the stub goes. */
142 static boolean hook_in_stub
143 PARAMS ((struct hook_stub_info *, lang_statement_union_type **));
146 hook_in_stub (info, lp)
147 struct hook_stub_info *info;
148 lang_statement_union_type **lp;
150 lang_statement_union_type *l;
153 for (; (l = *lp) != NULL; lp = &l->next)
155 switch (l->header.type)
157 case lang_constructors_statement_enum:
158 ret = hook_in_stub (info, &constructor_list.head);
163 case lang_output_section_statement_enum:
164 ret = hook_in_stub (info,
165 &l->output_section_statement.children.head);
170 case lang_wild_statement_enum:
171 ret = hook_in_stub (info, &l->wild_statement.children.head);
176 case lang_group_statement_enum:
177 ret = hook_in_stub (info, &l->group_statement.children.head);
182 case lang_input_section_enum:
183 if (l->input_section.section == info->input_section)
185 /* We've found our section. Insert the stub immediately
186 before its associated input section. */
187 *lp = info->add.head;
188 *(info->add.tail) = l;
193 case lang_data_statement_enum:
194 case lang_reloc_statement_enum:
195 case lang_object_symbols_statement_enum:
196 case lang_output_statement_enum:
197 case lang_target_statement_enum:
198 case lang_input_statement_enum:
199 case lang_assignment_statement_enum:
200 case lang_padding_statement_enum:
201 case lang_address_statement_enum:
202 case lang_fill_statement_enum:
214 /* Call-back for elf32_hppa_size_stubs. */
216 /* Create a new stub section, and arrange for it to be linked
217 immediately before INPUT_SECTION. */
220 hppaelf_add_stub_section (stub_name, input_section)
221 const char *stub_name;
222 asection *input_section;
226 asection *output_section;
228 lang_output_section_statement_type *os;
229 struct hook_stub_info info;
231 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_name);
232 if (stub_sec == NULL)
235 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
236 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP);
237 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
240 output_section = input_section->output_section;
241 secname = bfd_get_section_name (output_section->owner, output_section);
242 os = lang_output_section_find (secname);
244 info.input_section = input_section;
245 lang_list_init (&info.add);
246 wild_doit (&info.add, stub_sec, os, stub_file);
248 if (info.add.head == NULL)
251 if (hook_in_stub (&info, &os->children.head))
255 einfo ("%X%P: can not make stub section: %E\n");
260 /* Another call-back for elf32_hppa_size_stubs. */
263 hppaelf_layaout_sections_again ()
265 /* If we have changed sizes of the stub sections, then we need
266 to recalculate all the section offsets. This may mean we need to
267 add even more stubs. */
269 /* Delete all the padding statements, they're no longer valid. */
270 hppaelf_delete_padding_statements (stat_ptr);
272 /* Resize the sections. */
273 lang_size_sections (stat_ptr->head, abs_output_section,
274 &stat_ptr->head, 0, (bfd_vma) 0, false);
276 /* Redo special stuff. */
277 ldemul_after_allocation ();
279 /* Do the assignments again. */
280 lang_do_assignments (stat_ptr->head, abs_output_section,
281 (fill_type) 0, (bfd_vma) 0);
285 /* Final emulation specific call. For the PA we use this opportunity
286 to build linker stubs. */
291 /* If generating a relocateable output file, then we don't
292 have to examine the relocs. */
293 if (link_info.relocateable)
296 /* Call into the BFD backend to do the real work. */
297 if (! elf32_hppa_size_stubs (stub_file->the_bfd,
299 &hppaelf_add_stub_section,
300 &hppaelf_layaout_sections_again))
302 einfo ("%X%P: can not size stub section: %E\n");
306 /* Now build the linker stubs. */
307 if (stub_file->the_bfd->sections != NULL)
309 if (! elf32_hppa_build_stubs (stub_file->the_bfd, &link_info))
310 einfo ("%X%P: can not build stubs: %E\n");
316 # Put these routines in ld_${EMULATION_NAME}_emulation
318 LDEMUL_SET_OUTPUT_ARCH=hppaelf_set_output_arch
319 LDEMUL_FINISH=hppaelf_finish
320 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements