123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
/* AVR-specific support for 32-bit ELF.
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Copyright (C) 2006-2017 Free Software Foundation, Inc.
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Written by Bjoern Haase <bjoern.m.haase@web.de>
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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 3 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., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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/* These four functions will be called from the ld back-end. */
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extern void
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elf32_avr_setup_params (struct bfd_link_info *, bfd *, asection *,
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bfd_boolean, bfd_boolean, bfd_boolean,
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bfd_vma, bfd_boolean);
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extern int
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elf32_avr_setup_section_lists (bfd *, struct bfd_link_info *);
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extern bfd_boolean
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elf32_avr_size_stubs (bfd *, struct bfd_link_info *, bfd_boolean);
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extern bfd_boolean
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elf32_avr_build_stubs (struct bfd_link_info *);
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/* The name of the section into which the property records are stored. */
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#define AVR_PROPERTY_RECORD_SECTION_NAME ".avr.prop"
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/* The current version number for the format of the property records. */
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#define AVR_PROPERTY_RECORDS_VERSION 1
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/* The size of the header that is written to the property record section
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before the property records are written out. */
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#define AVR_PROPERTY_SECTION_HEADER_SIZE 4
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/* This holds a single property record in memory, the structure of this
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data when written out to the ELF section is more compressed. */
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struct avr_property_record
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{
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/* The section and offset for this record. */
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asection *section;
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bfd_vma offset;
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/* The type of this record. */
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enum {
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RECORD_ORG = 0,
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RECORD_ORG_AND_FILL = 1,
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RECORD_ALIGN = 2,
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RECORD_ALIGN_AND_FILL = 3
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} type;
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/* Type specific data. */
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union
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{
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/* RECORD_ORG and RECORD_ORG_AND_FILL. */
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struct
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{
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unsigned long fill;
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} org;
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/* RECORD_ALIGN and RECORD_ALIGN_AND_FILL. */
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struct
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{
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unsigned long bytes;
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unsigned long fill;
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/* This field is used during linker relaxation to track the number of
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bytes that have been opened up before this alignment directive.
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When we have enough bytes available it is possible to move the
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re-align this directive backwards while still maintaining the
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alignment requirement. */
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unsigned long preceding_deleted;
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} align;
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} data;
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};
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struct avr_property_record_list
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{
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/* The version number tells us the structure of the property record data
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within the section. See AVR_PROPERTY_RECORDS_VERSION. */
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bfd_byte version;
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/* The flags field is currently unused. This should be set to 0. */
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bfd_byte flags;
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/* The number of property records. This is stored as a 2-byte value in
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the section contents. */
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unsigned long record_count;
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/* The section from which the property records were loaded. This is the
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actual section containing the records, not the section(s) to which the
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records apply. */
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asection *section;
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/* The actual property records. */
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struct avr_property_record *records;
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};
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/* Load the property records from ABFD, return NULL if there are non
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found, otherwise return pointer to dynamically allocated memory. The
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memory for the header and all of the records are allocated in a single
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block, as such only the header needs to be freed. */
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extern struct avr_property_record_list *avr_elf32_load_property_records (bfd *abfd);
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/* Return a string that is the name of the property record pointed to by REC. */
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extern const char *avr_elf32_property_record_name (struct avr_property_record *rec);
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