| 1 | /* AVR-specific support for 32-bit ELF. |
| 2 | Copyright (C) 2006-2018 Free Software Foundation, Inc. |
| 3 | |
| 4 | Written by Bjoern Haase <bjoern.m.haase@web.de> |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| 21 | Boston, MA 02110-1301, USA. */ |
| 22 | |
| 23 | |
| 24 | /* These four functions will be called from the ld back-end. */ |
| 25 | |
| 26 | extern void |
| 27 | elf32_avr_setup_params (struct bfd_link_info *, bfd *, asection *, |
| 28 | bfd_boolean, bfd_boolean, bfd_boolean, |
| 29 | bfd_vma, bfd_boolean); |
| 30 | |
| 31 | extern int |
| 32 | elf32_avr_setup_section_lists (bfd *, struct bfd_link_info *); |
| 33 | |
| 34 | extern bfd_boolean |
| 35 | elf32_avr_size_stubs (bfd *, struct bfd_link_info *, bfd_boolean); |
| 36 | |
| 37 | extern bfd_boolean |
| 38 | elf32_avr_build_stubs (struct bfd_link_info *); |
| 39 | |
| 40 | /* The name of the section into which the property records are stored. */ |
| 41 | #define AVR_PROPERTY_RECORD_SECTION_NAME ".avr.prop" |
| 42 | |
| 43 | /* The current version number for the format of the property records. */ |
| 44 | #define AVR_PROPERTY_RECORDS_VERSION 1 |
| 45 | |
| 46 | /* The size of the header that is written to the property record section |
| 47 | before the property records are written out. */ |
| 48 | #define AVR_PROPERTY_SECTION_HEADER_SIZE 4 |
| 49 | |
| 50 | /* This holds a single property record in memory, the structure of this |
| 51 | data when written out to the ELF section is more compressed. */ |
| 52 | |
| 53 | struct avr_property_record |
| 54 | { |
| 55 | /* The section and offset for this record. */ |
| 56 | asection *section; |
| 57 | bfd_vma offset; |
| 58 | |
| 59 | /* The type of this record. */ |
| 60 | enum { |
| 61 | RECORD_ORG = 0, |
| 62 | RECORD_ORG_AND_FILL = 1, |
| 63 | RECORD_ALIGN = 2, |
| 64 | RECORD_ALIGN_AND_FILL = 3 |
| 65 | } type; |
| 66 | |
| 67 | /* Type specific data. */ |
| 68 | union |
| 69 | { |
| 70 | /* RECORD_ORG and RECORD_ORG_AND_FILL. */ |
| 71 | struct |
| 72 | { |
| 73 | unsigned long fill; |
| 74 | } org; |
| 75 | |
| 76 | /* RECORD_ALIGN and RECORD_ALIGN_AND_FILL. */ |
| 77 | struct |
| 78 | { |
| 79 | unsigned long bytes; |
| 80 | unsigned long fill; |
| 81 | |
| 82 | /* This field is used during linker relaxation to track the number of |
| 83 | bytes that have been opened up before this alignment directive. |
| 84 | When we have enough bytes available it is possible to move the |
| 85 | re-align this directive backwards while still maintaining the |
| 86 | alignment requirement. */ |
| 87 | unsigned long preceding_deleted; |
| 88 | } align; |
| 89 | } data; |
| 90 | }; |
| 91 | |
| 92 | struct avr_property_record_list |
| 93 | { |
| 94 | /* The version number tells us the structure of the property record data |
| 95 | within the section. See AVR_PROPERTY_RECORDS_VERSION. */ |
| 96 | bfd_byte version; |
| 97 | |
| 98 | /* The flags field is currently unused. This should be set to 0. */ |
| 99 | bfd_byte flags; |
| 100 | |
| 101 | /* The number of property records. This is stored as a 2-byte value in |
| 102 | the section contents. */ |
| 103 | unsigned long record_count; |
| 104 | |
| 105 | /* The section from which the property records were loaded. This is the |
| 106 | actual section containing the records, not the section(s) to which the |
| 107 | records apply. */ |
| 108 | asection *section; |
| 109 | |
| 110 | /* The actual property records. */ |
| 111 | struct avr_property_record *records; |
| 112 | }; |
| 113 | |
| 114 | /* Load the property records from ABFD, return NULL if there are non |
| 115 | found, otherwise return pointer to dynamically allocated memory. The |
| 116 | memory for the header and all of the records are allocated in a single |
| 117 | block, as such only the header needs to be freed. */ |
| 118 | |
| 119 | extern struct avr_property_record_list *avr_elf32_load_property_records (bfd *abfd); |
| 120 | |
| 121 | /* Return a string that is the name of the property record pointed to by REC. */ |
| 122 | extern const char *avr_elf32_property_record_name (struct avr_property_record *rec); |