Nick Clifton
22 years ago
25 changed files with 1399 additions and 249 deletions
@ -0,0 +1,625 @@ |
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/* Renesas / SuperH specific support for Symbian 32-bit ELF files
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Copyright 2004 |
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Free Software Foundation, Inc. |
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Contributed by Red Hat |
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This file is part of BFD, the Binary File Descriptor library. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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/* Stop elf32-sh.c from defining any target vectors. */ |
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#define SH_TARGET_ALREADY_DEFINED |
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#include "elf32-sh.c" |
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//#define DEBUG 1
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#define DEBUG 0 |
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#define DIRECTIVE_HEADER "#<SYMEDIT>#\n" |
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#define DIRECTIVE_IMPORT "IMPORT " |
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#define DIRECTIVE_EXPORT "EXPORT " |
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#define DIRECTIVE_AS "AS " |
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/* Macro to advance 's' until either it reaches 'e' or the
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character pointed to by 's' is equal to 'c'. If 'e' is |
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reached and DEBUG is enabled then the error message 'm' |
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is displayed. */ |
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#define SKIP_UNTIL(s,e,c,m) \ |
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do \ |
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{ \ |
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while (s < e && *s != c) \ |
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++ s; \ |
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if (s >= e) \ |
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{ \ |
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if (DEBUG) \ |
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fprintf (stderr, "Corrupt directive: %s\n", m); \ |
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result = FALSE; \ |
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} \ |
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} \ |
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while (0); \ |
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if (!result) \ |
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break; |
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/* Like SKIP_UNTIL except there are two terminator characters
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c1 and c2. */ |
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#define SKIP_UNTIL2(s,e,c1,c2,m) \ |
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do \ |
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{ \ |
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while (s < e && *s != c1 && *s != c2) \ |
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++ s; \ |
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if (s >= e) \ |
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{ \ |
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if (DEBUG) \ |
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fprintf (stderr, "Corrupt directive: %s\n", m); \ |
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result = FALSE; \ |
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} \ |
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} \ |
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while (0); \ |
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if (!result) \ |
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break; |
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/* Macro to advance 's' until either it reaches 'e' or the
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character pointed to by 's' is not equal to 'c'. If 'e' |
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is reached and DEBUG is enabled then the error message |
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'm' is displayed. */ |
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#define SKIP_WHILE(s,e,c,m) \ |
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do \ |
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{ \ |
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while (s < e && *s == c) \ |
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++ s; \ |
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if (s >= e) \ |
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{ \ |
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if (DEBUG) \ |
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fprintf (stderr, "Corrupt directive: %s\n", m); \ |
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result = FALSE; \ |
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} \ |
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} \ |
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while (0); \ |
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if (!result) \ |
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break; |
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typedef struct symbol_rename |
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{ |
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struct symbol_rename * next; |
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bfd_byte * current_name; |
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bfd_byte * new_name; |
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struct elf_link_hash_entry * current_hash; |
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unsigned long new_symndx; |
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} |
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symbol_rename; |
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static symbol_rename * rename_list = NULL; |
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/* Accumulate a list of symbols to be renamed. */ |
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static bfd_boolean |
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sh_symbian_import_as (struct bfd_link_info *info, bfd * abfd, |
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bfd_byte * current_name, bfd_byte * new_name) |
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{ |
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struct elf_link_hash_entry * new_hash; |
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symbol_rename * node; |
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if (DEBUG) |
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fprintf (stderr, "IMPORT '%s' AS '%s'\n", current_name, new_name); |
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for (node = rename_list; node; node = node->next) |
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if (strcmp (node->current_name, current_name) == 0) |
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{ |
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if (strcmp (node->new_name, new_name) == 0) |
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/* Already added to rename list. */ |
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return TRUE; |
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bfd_set_error (bfd_error_invalid_operation); |
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_bfd_error_handler (_("%s: IMPORT AS directive for %s conceals previous IMPORT AS"), |
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bfd_archive_filename (abfd), current_name); |
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return FALSE; |
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} |
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if ((node = bfd_malloc (sizeof * node)) == NULL) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "IMPORT AS: No mem for new rename node\n"); |
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return FALSE; |
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} |
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if ((node->current_name = bfd_malloc (strlen (current_name) + 1)) == NULL) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "IMPORT AS: No mem for current name field in rename node\n"); |
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free (node); |
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return FALSE; |
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} |
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else |
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strcpy (node->current_name, current_name); |
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if ((node->new_name = bfd_malloc (strlen (new_name) + 1)) == NULL) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "IMPORT AS: No mem for new name field in rename node\n"); |
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free (node->current_name); |
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free (node); |
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return FALSE; |
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} |
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else |
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strcpy (node->new_name, new_name); |
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node->next = rename_list; |
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node->current_hash = NULL; |
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node->new_symndx = 0; |
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rename_list = node; |
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new_hash = elf_link_hash_lookup (elf_hash_table (info), node->new_name, TRUE, FALSE, TRUE); |
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bfd_elf_link_record_dynamic_symbol (info, new_hash); |
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if (new_hash->root.type == bfd_link_hash_new) |
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new_hash->root.type = bfd_link_hash_undefined; |
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return TRUE; |
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} |
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static bfd_boolean |
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sh_symbian_import (bfd * abfd ATTRIBUTE_UNUSED, bfd_byte * name) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "IMPORT '%s'\n", name); |
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/* XXX: Generate an import somehow ? */ |
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return TRUE; |
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} |
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static bfd_boolean |
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sh_symbian_export (bfd * abfd ATTRIBUTE_UNUSED, bfd_byte * name) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "EXPORT '%s'\n", name); |
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/* XXX: Generate an export somehow ? */ |
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return TRUE; |
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} |
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/* Process any magic embedded commands in the .directive. section.
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Returns TRUE upon sucecss, but if it fails it sets bfd_error and |
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returns FALSE. */ |
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static bfd_boolean |
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sh_symbian_process_embedded_commands (struct bfd_link_info *info, bfd * abfd, |
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asection * sec, bfd_byte * contents) |
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{ |
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bfd_byte *s; |
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bfd_byte *e; |
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bfd_boolean result = TRUE; |
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bfd_size_type sz = sec->rawsize ? sec->rawsize : sec->size; |
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for (s = contents, e = s + sz; s < e;) |
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{ |
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bfd_byte * directive = s; |
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switch (*s) |
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{ |
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/* I want to use "case DIRECTIVE_HEADER [0]:" here but gcc won't let me :-( */ |
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case '#': |
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if (strcmp (s, DIRECTIVE_HEADER)) |
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result = FALSE; |
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else |
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/* Just ignore the header.
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XXX: Strictly speaking we ought to check that the header |
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is present and that it is the first thing in the file. */ |
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s += strlen (DIRECTIVE_HEADER) + 1; |
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break; |
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case 'I': |
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if (strncmp (s, DIRECTIVE_IMPORT, strlen (DIRECTIVE_IMPORT))) |
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result = FALSE; |
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else |
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{ |
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bfd_byte * new_name; |
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bfd_byte * new_name_end; |
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bfd_byte name_end_char; |
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/* Skip the IMPORT directive. */ |
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s += strlen (DIRECTIVE_IMPORT); |
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new_name = s; |
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/* Find the end of the new name. */ |
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while (s < e && *s != ' ' && *s != '\n') |
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++ s; |
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if (s >= e) |
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{ |
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/* We have reached the end of the .directive section
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without encountering a string terminator. This is |
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allowed for IMPORT directives. */ |
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new_name_end = e - 1; |
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name_end_char = * new_name_end; |
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* new_name_end = 0; |
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result = sh_symbian_import (abfd, new_name); |
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* new_name_end = name_end_char; |
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break; |
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} |
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/* Remember where the name ends. */ |
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new_name_end = s; |
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/* Skip any whitespace before the 'AS'. */ |
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SKIP_WHILE (s, e, ' ', "IMPORT: Name just followed by spaces"); |
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/* Terminate the new name. (Do this after skiping...) */ |
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name_end_char = * new_name_end; |
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* new_name_end = 0; |
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/* Check to see if 'AS '... is present. If se we have an IMPORT AS
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directive, otherwise we have an IMPORT directive. */ |
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if (strncmp (s, DIRECTIVE_AS, strlen (DIRECTIVE_AS))) |
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{ |
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/* Skip the new-line at the end of the name. */ |
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if (DEBUG && name_end_char != '\n') |
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fprintf (stderr, "IMPORT: No newline at end of directive\n"); |
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else |
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s ++; |
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result = sh_symbian_import (abfd, new_name); |
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/* Skip past the NUL character. */ |
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if (* s ++ != 0) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "IMPORT: No NUL at end of directive\n"); |
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} |
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} |
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else |
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{ |
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bfd_byte * current_name; |
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bfd_byte * current_name_end; |
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bfd_byte current_name_end_char; |
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/* Skip the 'AS '. */ |
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s += strlen (DIRECTIVE_AS); |
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/* Skip any white space after the 'AS '. */ |
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SKIP_WHILE (s, e, ' ', "IMPORT AS: Nothing after AS"); |
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current_name = s; |
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/* Find the end of the current name. */ |
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SKIP_UNTIL2 (s, e, ' ', '\n', "IMPORT AS: No newline at the end of the current name"); |
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/* Skip (backwards) over spaces at the end of the current name. */ |
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current_name_end = s; |
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current_name_end_char = * current_name_end; |
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SKIP_WHILE (s, e, ' ', "IMPORT AS: Current name just followed by spaces"); |
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/* Skip past the newline character. */ |
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if (* s ++ != '\n') |
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if (DEBUG) |
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fprintf (stderr, "IMPORT AS: No newline at end of directive\n"); |
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/* Terminate the current name after having performed the skips. */ |
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* current_name_end = 0; |
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result = sh_symbian_import_as (info, abfd, current_name, new_name); |
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/* The next character should be a NUL. */ |
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if (* s != 0) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "IMPORT AS: Junk at end of directive\n"); |
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result = FALSE; |
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} |
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s ++; |
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* current_name_end = current_name_end_char; |
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} |
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/* Restore the characters we overwrote, since
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the .directive section will be emitted. */ |
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* new_name_end = name_end_char; |
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} |
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break; |
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case 'E': |
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if (strncmp (s, DIRECTIVE_EXPORT, strlen (DIRECTIVE_EXPORT))) |
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result = FALSE; |
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else |
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{ |
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bfd_byte * name; |
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bfd_byte * name_end; |
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bfd_byte name_end_char; |
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/* Skip the directive. */ |
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s += strlen (DIRECTIVE_EXPORT); |
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name = s; |
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/* Find the end of the name to be exported. */ |
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SKIP_UNTIL (s, e, '\n', "EXPORT: no newline at end of directive"); |
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/* Skip (backwards) over spaces at end of exported name. */ |
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for (name_end = s; name_end[-1] == ' '; name_end --) |
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; |
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/* name_end now points at the first character after the
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end of the exported name, so we can termiante it */ |
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name_end_char = * name_end; |
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* name_end = 0; |
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/* Skip passed the newline character. */ |
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s ++; |
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result = sh_symbian_export (abfd, name); |
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/* The next character should be a NUL. */ |
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if (* s != 0) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "EXPORT: Junk at end of directive\n"); |
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result = FALSE; |
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} |
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s++; |
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/* Restore the character we deleted. */ |
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* name_end = name_end_char; |
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} |
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break; |
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default: |
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result = FALSE; |
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break; |
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} |
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if (! result) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "offset into .directive section: %d\n", directive - contents); |
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bfd_set_error (bfd_error_invalid_operation); |
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_bfd_error_handler (_("%s: Unrecognised .directive command: %s"), |
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bfd_archive_filename (abfd), directive); |
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break; |
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} |
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} |
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return result; |
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} |
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/* Scan a bfd for a .directive section, and if found process it.
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Returns TRUE upon success, FALSE otherwise. */ |
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bfd_boolean bfd_elf32_sh_symbian_process_directives (struct bfd_link_info *info, bfd * abfd); |
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bfd_boolean |
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bfd_elf32_sh_symbian_process_directives (struct bfd_link_info *info, bfd * abfd) |
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{ |
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bfd_boolean result = FALSE; |
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bfd_byte * contents; |
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asection * sec = bfd_get_section_by_name (abfd, ".directive"); |
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bfd_size_type sz; |
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if (!sec) |
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return TRUE; |
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sz = sec->rawsize ? sec->rawsize : sec->size; |
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contents = bfd_malloc (sz); |
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if (!contents) |
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bfd_set_error (bfd_error_no_memory); |
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else |
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{ |
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if (bfd_get_section_contents (abfd, sec, contents, 0, sz)) |
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result = sh_symbian_process_embedded_commands (info, abfd, sec, contents); |
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free (contents); |
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} |
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return result; |
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} |
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/* Intercept the normal sh_relocate_section() function
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and magle the relocs to allow for symbol renaming. */ |
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static bfd_boolean |
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sh_symbian_relocate_section (bfd * output_bfd, |
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struct bfd_link_info * info, |
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bfd * input_bfd, |
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asection * input_section, |
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bfd_byte * contents, |
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Elf_Internal_Rela * relocs, |
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Elf_Internal_Sym * local_syms, |
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asection ** local_sections) |
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{ |
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/* When performing a final link we implement the IMPORT AS directives. */ |
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if (!info->relocatable) |
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{ |
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Elf_Internal_Rela * rel; |
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Elf_Internal_Rela * relend; |
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Elf_Internal_Shdr * symtab_hdr; |
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struct elf_link_hash_entry ** sym_hashes; |
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struct elf_link_hash_entry ** sym_hashes_end; |
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struct elf_link_hash_table * hash_table; |
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symbol_rename * ptr; |
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bfd_size_type num_global_syms; |
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unsigned long num_local_syms; |
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BFD_ASSERT (! elf_bad_symtab (input_bfd)); |
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symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
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hash_table = elf_hash_table (info); |
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num_local_syms = symtab_hdr->sh_info; |
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num_global_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
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num_global_syms -= num_local_syms; |
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sym_hashes = elf_sym_hashes (input_bfd); |
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sym_hashes_end = sym_hashes + num_global_syms; |
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/* First scan the rename table, caching the hash entry and the new index. */ |
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for (ptr = rename_list; ptr; ptr = ptr->next) |
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{ |
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struct elf_link_hash_entry * new_hash; |
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struct elf_link_hash_entry ** h; |
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ptr->current_hash = elf_link_hash_lookup (hash_table, ptr->current_name, FALSE, FALSE, TRUE); |
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if (ptr->current_hash == NULL) |
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{ |
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if (DEBUG) |
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fprintf (stderr, "IMPORT AS: current symbol '%s' does not exist\n", ptr->current_name); |
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continue; |
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} |
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new_hash = elf_link_hash_lookup (hash_table, ptr->new_name, FALSE, FALSE, TRUE); |
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/* If we could not find the symbol then it is a new, undefined symbol.
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Symbian want this behaviour - ie they want to be able to rename the |
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reference in a reloc from one undefined symbol to another, new and |
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undefined symbol. So we create that symbol here. */ |
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if (new_hash == NULL) |
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{ |
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asection * psec = bfd_und_section_ptr; |
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Elf_Internal_Sym new_sym; |
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bfd_vma new_value = 0; |
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bfd_boolean skip; |
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bfd_boolean override; |
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bfd_boolean type_change_ok; |
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bfd_boolean size_change_ok; |
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new_sym.st_value = 0; |
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new_sym.st_size = 0; |
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new_sym.st_name = -1; |
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new_sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_FUNC); |
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new_sym.st_other = ELF_ST_VISIBILITY (STV_DEFAULT); |
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new_sym.st_shndx = SHN_UNDEF; |
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if (! _bfd_elf_merge_symbol (input_bfd, info, ptr->new_name, & new_sym, & psec, |
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& new_value, & new_hash, & skip, & override, & type_change_ok, |
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& size_change_ok)) |
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{ |
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_bfd_error_handler (_("%s: Failed to add renamed symbol %s"), |
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bfd_archive_filename (input_bfd), ptr->new_name); |
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continue; |
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} |
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/* XXX - should we check psec, skip, override etc ? */ |
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new_hash->root.type = bfd_link_hash_undefined; |
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/* Allow the symbol to become local if necessary. */ |
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if (new_hash->dynindx == -1) |
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new_hash->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
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if (DEBUG) |
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fprintf (stderr, "Created new symbol %s\n", ptr->new_name); |
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} |
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/* Convert the new_hash value into a index into the table of symbol hashes. */ |
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for (h = sym_hashes; h < sym_hashes_end; h ++) |
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{ |
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if (* h == new_hash) |
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{ |
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ptr->new_symndx = h - sym_hashes + num_local_syms; |
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if (DEBUG) |
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fprintf (stderr, "Converted new hash to index of %ld\n", ptr->new_symndx); |
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break; |
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} |
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} |
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/* If the new symbol is not in the hash table then it must be
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because it is one of the newly created undefined symbols |
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manufactured above. So we extend the sym has table here to |
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include this extra symbol. */ |
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if (h == sym_hashes_end) |
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{ |
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struct elf_link_hash_entry ** new_sym_hashes; |
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/* This is not very efficient, but it works. */ |
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++ num_global_syms; |
|||
new_sym_hashes = bfd_alloc (input_bfd, num_global_syms * sizeof * sym_hashes); |
|||
if (new_sym_hashes == NULL) |
|||
{ |
|||
if (DEBUG) |
|||
fprintf (stderr, "Out of memory extending hash table\n"); |
|||
continue; |
|||
} |
|||
memcpy (new_sym_hashes, sym_hashes, (num_global_syms - 1) * sizeof * sym_hashes); |
|||
new_sym_hashes[num_global_syms - 1] = new_hash; |
|||
elf_sym_hashes (input_bfd) = sym_hashes = new_sym_hashes; |
|||
sym_hashes_end = sym_hashes + num_global_syms; |
|||
symtab_hdr->sh_size = (num_global_syms + num_local_syms) * sizeof (Elf32_External_Sym); |
|||
|
|||
ptr->new_symndx = num_global_syms - 1 + num_local_syms; |
|||
|
|||
if (DEBUG) |
|||
fprintf (stderr, "Extended symbol hash table to insert new symbol as index %ld\n", |
|||
ptr->new_symndx); |
|||
} |
|||
} |
|||
|
|||
/* Walk the reloc list looking for references to renamed symbols.
|
|||
When we find one, we alter the index in the reloc to point to the new symbol. */ |
|||
for (rel = relocs, relend = relocs + input_section->reloc_count; |
|||
rel < relend; |
|||
rel ++) |
|||
{ |
|||
int r_type; |
|||
unsigned long r_symndx; |
|||
struct elf_link_hash_entry * h; |
|||
|
|||
r_symndx = ELF32_R_SYM (rel->r_info); |
|||
r_type = ELF32_R_TYPE (rel->r_info); |
|||
|
|||
/* Ignore unused relocs. */ |
|||
if ((r_type >= (int) R_SH_GNU_VTINHERIT |
|||
&& r_type <= (int) R_SH_LABEL) |
|||
|| r_type == (int) R_SH_NONE |
|||
|| r_type < 0 |
|||
|| r_type >= R_SH_max) |
|||
continue; |
|||
|
|||
/* Ignore relocs against local symbols. */ |
|||
if (r_symndx < num_local_syms) |
|||
continue; |
|||
|
|||
BFD_ASSERT (r_symndx < (num_global_syms + num_local_syms)); |
|||
h = sym_hashes[r_symndx - num_local_syms]; |
|||
BFD_ASSERT (h != NULL); |
|||
|
|||
while ( h->root.type == bfd_link_hash_indirect |
|||
|| h->root.type == bfd_link_hash_warning) |
|||
h = (struct elf_link_hash_entry *) h->root.u.i.link; |
|||
|
|||
/* If the symbol is defined there is no need to rename it.
|
|||
XXX - is this true ? */ |
|||
if ( h->root.type == bfd_link_hash_defined |
|||
|| h->root.type == bfd_link_hash_defweak |
|||
|| h->root.type == bfd_link_hash_undefweak) |
|||
continue; |
|||
|
|||
for (ptr = rename_list; ptr; ptr = ptr->next) |
|||
if (h == ptr->current_hash) |
|||
{ |
|||
BFD_ASSERT (ptr->new_symndx); |
|||
if (DEBUG) |
|||
fprintf (stderr, "convert reloc %lx from using index %ld to using index %ld\n", |
|||
(long) rel->r_info, (long) ELF32_R_SYM (rel->r_info), ptr->new_symndx); |
|||
rel->r_info = ELF32_R_INFO (ptr->new_symndx, r_type); |
|||
break; |
|||
} |
|||
} |
|||
} |
|||
|
|||
return sh_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
|||
contents, relocs, local_syms, local_sections); |
|||
} |
|||
|
|||
static bfd_boolean |
|||
sh_symbian_check_directives (bfd *abfd, struct bfd_link_info *info) |
|||
{ |
|||
return bfd_elf32_sh_symbian_process_directives (info, abfd); |
|||
} |
|||
|
|||
#define TARGET_LITTLE_SYM bfd_elf32_shl_symbian_vec |
|||
#define TARGET_LITTLE_NAME "elf32-shl-symbian" |
|||
|
|||
#undef elf_backend_relocate_section |
|||
#define elf_backend_relocate_section sh_symbian_relocate_section |
|||
#undef elf_backend_check_directives |
|||
#define elf_backend_check_directives sh_symbian_check_directives |
|||
|
|||
#include "elf32-target.h" |
|||
File diff suppressed because it is too large
@ -0,0 +1,17 @@ |
|||
TEXT_START_ADDR=0x8000 |
|||
SHLIB_TEXT_START_ADDR=0x8000 |
|||
SHLIB_DATA_ADDR=0x400000 |
|||
|
|||
. ${srcdir}/emulparams/shelf.sh |
|||
|
|||
# Use only two underscores for the constructor/destructor symbols |
|||
CTOR_START='__ctors = .;' |
|||
CTOR_END='__ctors_end = .;' |
|||
DTOR_START='__dtors = .;' |
|||
DTOR_END='__dtors_end = .;' |
|||
|
|||
# Suppress the .stack section. |
|||
test -z "$CREATE_SHLIB" && OTHER_SECTIONS="${RELOCATING+PROVIDE (_stack = 0x30000);}" |
|||
|
|||
OUTPUT_FORMAT="elf32-shl-symbian" |
|||
SCRIPT_NAME=elf32sh-symbian |
|||
@ -0,0 +1,377 @@ |
|||
# |
|||
# Unusual variables checked by this code: |
|||
# NOP - four byte opcode for no-op (defaults to 0) |
|||
# DATA_ADDR - if end-of-text-plus-one-page isn't right for data start |
|||
# INITIAL_READONLY_SECTIONS - at start of text segment |
|||
# OTHER_READONLY_SECTIONS - other than .text .init .rodata ... |
|||
# (e.g., .PARISC.milli) |
|||
# OTHER_TEXT_SECTIONS - these get put in .text when relocating |
|||
# OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ... |
|||
# (e.g., .PARISC.global) |
|||
# OTHER_BSS_SECTIONS - other than .bss .sbss ... |
|||
# OTHER_SECTIONS - at the end |
|||
# EXECUTABLE_SYMBOLS - symbols that must be defined for an |
|||
# executable (e.g., _DYNAMIC_LINK) |
|||
# TEXT_START_SYMBOLS - symbols that appear at the start of the |
|||
# .text section. |
|||
# DATA_START_SYMBOLS - symbols that appear at the start of the |
|||
# .data section. |
|||
# OTHER_GOT_SYMBOLS - symbols defined just before .got. |
|||
# OTHER_GOT_SECTIONS - sections just after .got. |
|||
# OTHER_SDATA_SECTIONS - sections just after .sdata. |
|||
# OTHER_BSS_SYMBOLS - symbols that appear at the start of the |
|||
# .bss section besides __bss_start. |
|||
# DATA_PLT - .plt should be in data segment, not text segment. |
|||
# BSS_PLT - .plt should be in bss segment |
|||
# TEXT_DYNAMIC - .dynamic in text segment, not data segment. |
|||
# EMBEDDED - whether this is for an embedded system. |
|||
# SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set |
|||
# start address of shared library. |
|||
# INPUT_FILES - INPUT command of files to always include |
|||
# WRITABLE_RODATA - if set, the .rodata section should be writable |
|||
# INIT_START, INIT_END - statements just before and just after |
|||
# combination of .init sections. |
|||
# FINI_START, FINI_END - statements just before and just after |
|||
# combination of .fini sections. |
|||
# STACK_ADDR - start of a .stack section. |
|||
# OTHER_END_SYMBOLS - symbols to place right at the end of the script. |
|||
# |
|||
# When adding sections, do note that the names of some sections are used |
|||
# when specifying the start address of the next. |
|||
# |
|||
|
|||
# Many sections come in three flavours. There is the 'real' section, |
|||
# like ".data". Then there are the per-procedure or per-variable |
|||
# sections, generated by -ffunction-sections and -fdata-sections in GCC, |
|||
# and useful for --gc-sections, which for a variable "foo" might be |
|||
# ".data.foo". Then there are the linkonce sections, for which the linker |
|||
# eliminates duplicates, which are named like ".gnu.linkonce.d.foo". |
|||
# The exact correspondences are: |
|||
# |
|||
# Section Linkonce section |
|||
# .text .gnu.linkonce.t.foo |
|||
# .rodata .gnu.linkonce.r.foo |
|||
# .data .gnu.linkonce.d.foo |
|||
# .bss .gnu.linkonce.b.foo |
|||
# .sdata .gnu.linkonce.s.foo |
|||
# .sbss .gnu.linkonce.sb.foo |
|||
# .sdata2 .gnu.linkonce.s2.foo |
|||
# .sbss2 .gnu.linkonce.sb2.foo |
|||
# .debug_info .gnu.linkonce.wi.foo |
|||
# .tdata .gnu.linkonce.td.foo |
|||
# .tbss .gnu.linkonce.tb.foo |
|||
# |
|||
# Each of these can also have corresponding .rel.* and .rela.* sections. |
|||
|
|||
test -z "$ENTRY" && ENTRY=_start |
|||
test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT} |
|||
test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT} |
|||
if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi |
|||
test -z "${ELFSIZE}" && ELFSIZE=32 |
|||
test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8" |
|||
test "$LD_FLAG" = "N" && DATA_ADDR=. |
|||
test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE="" |
|||
test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE="" |
|||
DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))" |
|||
DATA_SEGMENT_END="" |
|||
if test -n "${COMMONPAGESIZE}"; then |
|||
DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})" |
|||
DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);" |
|||
fi |
|||
INTERP=".interp ALIGN(4) : { *(.interp) }" |
|||
PLT=".plt : { *(.plt) } :dynamic :dyn" |
|||
DYNAMIC=".dynamic : { *(.dynamic) } :dynamic :dyn" |
|||
RODATA=".rodata ALIGN(4) : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }" |
|||
STACKNOTE="/DISCARD/ : { *(.note.GNU-stack) *(.directive) }" |
|||
test -z "$GOT" && GOT=".got ${RELOCATING-0} : { *(.got.plt) *(.got) } :dynamic :dyn" |
|||
CTOR=".ctors ALIGN(4) : |
|||
{ |
|||
${CONSTRUCTING+${CTOR_START}} |
|||
/* gcc uses crtbegin.o to find the start of |
|||
the constructors, so we make sure it is |
|||
first. Because this is a wildcard, it |
|||
doesn't matter if the user does not |
|||
actually link against crtbegin.o; the |
|||
linker won't look for a file to match a |
|||
wildcard. The wildcard also means that it |
|||
doesn't matter which directory crtbegin.o |
|||
is in. */ |
|||
|
|||
KEEP (*crtbegin*.o(.ctors)) |
|||
|
|||
/* We don't want to include the .ctor section from |
|||
from the crtend.o file until after the sorted ctors. |
|||
The .ctor section from the crtend file contains the |
|||
end of ctors marker and it must be last */ |
|||
|
|||
KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors)) |
|||
KEEP (*(SORT(.ctors.*))) |
|||
KEEP (*(.ctors)) |
|||
${CONSTRUCTING+${CTOR_END}} |
|||
} :text" |
|||
DTOR=".dtors ALIGN(4) : |
|||
{ |
|||
${CONSTRUCTING+${DTOR_START}} |
|||
KEEP (*crtbegin*.o(.dtors)) |
|||
KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors)) |
|||
KEEP (*(SORT(.dtors.*))) |
|||
KEEP (*(.dtors)) |
|||
${CONSTRUCTING+${DTOR_END}} |
|||
} :text" |
|||
STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} : |
|||
{ |
|||
${RELOCATING+_stack = .;} |
|||
*(.stack) |
|||
} :data" |
|||
|
|||
# if this is for an embedded system, don't add SIZEOF_HEADERS. |
|||
if [ -z "$EMBEDDED" ]; then |
|||
test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS" |
|||
else |
|||
test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}" |
|||
fi |
|||
|
|||
cat <<EOF |
|||
OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}", |
|||
"${LITTLE_OUTPUT_FORMAT}") |
|||
OUTPUT_ARCH(${OUTPUT_ARCH}) |
|||
ENTRY(${ENTRY}) |
|||
|
|||
${RELOCATING+${LIB_SEARCH_DIRS}} |
|||
${RELOCATING+/* Do we need any of these for elf? |
|||
__DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */} |
|||
${RELOCATING+${EXECUTABLE_SYMBOLS}} |
|||
${RELOCATING+${INPUT_FILES}} |
|||
${RELOCATING- /* For some reason, the Solaris linker makes bad executables |
|||
if gld -r is used and the intermediate file has sections starting |
|||
at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld |
|||
bug. But for now assigning the zero vmas works. */} |
|||
|
|||
PHDRS |
|||
{ |
|||
headers PT_PHDR PHDRS ; |
|||
text PT_LOAD ; |
|||
data PT_LOAD ; |
|||
dyn PT_LOAD FLAGS (0) ; |
|||
dynamic PT_DYNAMIC ; |
|||
} |
|||
|
|||
SECTIONS |
|||
{ |
|||
/* Read-only sections, merged into text segment: */ |
|||
${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}} |
|||
${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}} |
|||
${CREATE_PIE+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}} |
|||
${CREATE_SHLIB-${INTERP}} |
|||
|
|||
${INITIAL_READONLY_SECTIONS} |
|||
|
|||
.init ALIGN(4) : |
|||
{ |
|||
${RELOCATING+${INIT_START}} |
|||
KEEP (*(.init)) |
|||
${RELOCATING+${INIT_END}} |
|||
} :text =${NOP-0} |
|||
|
|||
.text ALIGN(4) : |
|||
{ |
|||
${RELOCATING+${TEXT_START_SYMBOLS}} |
|||
*(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*}) |
|||
/* .gnu.warning sections are handled specially by elf32.em. */ |
|||
*(.gnu.warning) |
|||
${RELOCATING+${OTHER_TEXT_SECTIONS}} |
|||
} =${NOP-0} |
|||
|
|||
${RELOCATING+${CTOR}} |
|||
${RELOCATING+${DTOR}} |
|||
|
|||
.fini ALIGN(4) : |
|||
{ |
|||
${RELOCATING+${FINI_START}} |
|||
KEEP (*(.fini)) |
|||
${RELOCATING+${FINI_END}} |
|||
} =${NOP-0} |
|||
|
|||
${RELOCATING+PROVIDE (__etext = .);} |
|||
${RELOCATING+PROVIDE (_etext = .);} |
|||
${RELOCATING+PROVIDE (etext = .);} |
|||
|
|||
${WRITABLE_RODATA-${RODATA}} |
|||
.rodata1 ALIGN(4) : { *(.rodata1) } |
|||
|
|||
ExportTable ALIGN(4) : { KEEP (*(ExportTable)) } |
|||
.eh_frame_hdr ALIGN(4) : { *(.eh_frame_hdr) } :text |
|||
|
|||
/* Adjust the address for the data segment. We want to adjust up to |
|||
the same address within the page on the next page up. */ |
|||
. = ALIGN(128) + (. & (128 - 1)); |
|||
/* Ensure the __preinit_array_start label is properly aligned. We |
|||
could instead move the label definition inside the section, but |
|||
the linker would then create the section even if it turns out to |
|||
be empty, which isn't pretty. */ |
|||
${RELOCATING+. = ALIGN(${ALIGNMENT});} |
|||
${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_start = .);}} |
|||
.preinit_array ${RELOCATING-0} : { *(.preinit_array) } |
|||
${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_end = .);}} |
|||
|
|||
${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_start = .);}} |
|||
.init_array ${RELOCATING-0} : { *(.init_array) } |
|||
${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_end = .);}} |
|||
|
|||
${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_start = .);}} |
|||
.fini_array ${RELOCATING-0} : { *(.fini_array) } |
|||
${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_end = .);}} |
|||
|
|||
${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}} |
|||
${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}} |
|||
${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}} |
|||
|
|||
.data ALIGN(4) : |
|||
{ |
|||
${RELOCATING+${DATA_START_SYMBOLS}} |
|||
*(.data${RELOCATING+ .data.* .gnu.linkonce.d.*}) |
|||
${CONSTRUCTING+SORT(CONSTRUCTORS)} |
|||
} :data |
|||
|
|||
.data1 ALIGN(4) : { *(.data1) } :data |
|||
.tdata ALIGN(4) : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) } :data |
|||
.tbss ALIGN(4) : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} } :data |
|||
.eh_frame ALIGN(4) : { KEEP (*(.eh_frame)) } :data |
|||
.gcc_except_table ALIGN(4) : { *(.gcc_except_table) } :data |
|||
${WRITABLE_RODATA+${RODATA}} |
|||
${OTHER_READWRITE_SECTIONS} |
|||
${SDATA} |
|||
${OTHER_SDATA_SECTIONS} |
|||
${RELOCATING+_edata = .;} |
|||
${RELOCATING+PROVIDE (edata = .);} |
|||
${RELOCATING+__bss_start = .;} |
|||
${RELOCATING+${OTHER_BSS_SYMBOLS}} |
|||
${BSS_PLT+${PLT}} |
|||
.bss ALIGN(4) : |
|||
{ |
|||
*(.dynbss) |
|||
*(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*}) |
|||
*(COMMON) |
|||
/* Align here to ensure that the .bss section occupies space up to |
|||
_end. Align after .bss to ensure correct alignment even if the |
|||
.bss section disappears because there are no input sections. */ |
|||
${RELOCATING+. = ALIGN(${ALIGNMENT});} |
|||
} :data |
|||
${OTHER_BSS_SECTIONS} |
|||
${RELOCATING+. = ALIGN(${ALIGNMENT});} |
|||
${RELOCATING+_end = .;} |
|||
${RELOCATING+${OTHER_BSS_END_SYMBOLS}} |
|||
${RELOCATING+PROVIDE (end = .);} |
|||
${RELOCATING+${DATA_SEGMENT_END}} |
|||
|
|||
${TEXT_DYNAMIC-${DYNAMIC}} |
|||
${TEXT_DYNAMIC+${DYNAMIC}} |
|||
.hash ${RELOCATING-0} : { *(.hash) } :dynamic :dyn |
|||
.dynsym ${RELOCATING-0} : { *(.dynsym) } :dynamic :dyn |
|||
.dynstr ${RELOCATING-0} : { *(.dynstr) } :dynamic :dyn |
|||
${DATA_PLT-${BSS_PLT-${PLT}}} |
|||
.got.plt : { *(.got.plt) } :dynamic :dyn |
|||
.gnu.version ${RELOCATING-0} : { *(.gnu.version) } |
|||
.gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) } |
|||
.gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) } |
|||
EOF |
|||
if [ "x$COMBRELOC" = x ]; then |
|||
COMBRELOCCAT=cat |
|||
else |
|||
COMBRELOCCAT="cat > $COMBRELOC" |
|||
fi |
|||
eval $COMBRELOCCAT <<EOF |
|||
.rel.init ${RELOCATING-0} : { *(.rel.init) } |
|||
.rela.init ${RELOCATING-0} : { *(.rela.init) } |
|||
.rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) } |
|||
.rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) } |
|||
.rel.fini ${RELOCATING-0} : { *(.rel.fini) } |
|||
.rela.fini ${RELOCATING-0} : { *(.rela.fini) } |
|||
.rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) } |
|||
.rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) } |
|||
${OTHER_READONLY_RELOC_SECTIONS} |
|||
.rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) } |
|||
.rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) } |
|||
.rel.tdata ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) } |
|||
.rela.tdata ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) } |
|||
.rel.tbss ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) } |
|||
.rela.tbss ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) } |
|||
.rel.ctors ${RELOCATING-0} : { *(.rel.ctors) } |
|||
.rela.ctors ${RELOCATING-0} : { *(.rela.ctors) } |
|||
.rel.dtors ${RELOCATING-0} : { *(.rel.dtors) } |
|||
.rela.dtors ${RELOCATING-0} : { *(.rela.dtors) } |
|||
.rel.got ${RELOCATING-0} : { *(.rel.got) } |
|||
.rela.got ${RELOCATING-0} : { *(.rela.got) } |
|||
${OTHER_GOT_RELOC_SECTIONS} |
|||
.rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) } |
|||
.rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) } |
|||
EOF |
|||
if [ -n "$COMBRELOC" ]; then |
|||
cat <<EOF |
|||
.rel.dyn ${RELOCATING-0} : |
|||
{ |
|||
EOF |
|||
sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC |
|||
cat <<EOF |
|||
} |
|||
.rela.dyn ${RELOCATING-0} : |
|||
{ |
|||
EOF |
|||
sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC |
|||
cat <<EOF |
|||
} |
|||
EOF |
|||
fi |
|||
cat <<EOF |
|||
.rel.plt ${RELOCATING-0} : { *(.rel.plt) } |
|||
.rela.plt ${RELOCATING-0} : { *(.rela.plt) } |
|||
${OTHER_PLT_RELOC_SECTIONS} |
|||
|
|||
|
|||
/* Stabs debugging sections. */ |
|||
.stab 0 : { *(.stab) } |
|||
.stabstr 0 : { *(.stabstr) } |
|||
.stab.excl 0 : { *(.stab.excl) } |
|||
.stab.exclstr 0 : { *(.stab.exclstr) } |
|||
.stab.index 0 : { *(.stab.index) } |
|||
.stab.indexstr 0 : { *(.stab.indexstr) } |
|||
|
|||
.comment 0 : { *(.comment) } |
|||
|
|||
/* DWARF debug sections. |
|||
Symbols in the DWARF debugging sections are relative to the beginning |
|||
of the section so we begin them at 0. */ |
|||
|
|||
/* DWARF 1 */ |
|||
.debug 0 : { *(.debug) } |
|||
.line 0 : { *(.line) } |
|||
|
|||
/* GNU DWARF 1 extensions */ |
|||
.debug_srcinfo 0 : { *(.debug_srcinfo) } |
|||
.debug_sfnames 0 : { *(.debug_sfnames) } |
|||
|
|||
/* DWARF 1.1 and DWARF 2 */ |
|||
.debug_aranges 0 : { *(.debug_aranges) } |
|||
.debug_pubnames 0 : { *(.debug_pubnames) } |
|||
|
|||
/* DWARF 2 */ |
|||
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) } |
|||
.debug_abbrev 0 : { *(.debug_abbrev) } |
|||
.debug_line 0 : { *(.debug_line) } |
|||
.debug_frame 0 : { *(.debug_frame) } |
|||
.debug_str 0 : { *(.debug_str) } |
|||
.debug_loc 0 : { *(.debug_loc) } |
|||
.debug_macinfo 0 : { *(.debug_macinfo) } |
|||
|
|||
/* SGI/MIPS DWARF 2 extensions */ |
|||
.debug_weaknames 0 : { *(.debug_weaknames) } |
|||
.debug_funcnames 0 : { *(.debug_funcnames) } |
|||
.debug_typenames 0 : { *(.debug_typenames) } |
|||
.debug_varnames 0 : { *(.debug_varnames) } |
|||
|
|||
${STACK_ADDR+${STACK}} |
|||
${OTHER_SECTIONS} |
|||
${RELOCATING+${OTHER_END_SYMBOLS}} |
|||
${RELOCATING+${STACKNOTE}} |
|||
} |
|||
EOF |
|||
Loading…
Reference in new issue