1 /* Motorola 68HC11/68HC12-specific support for 32-bit ELF
2 Copyright (C) 2003-2015 Free Software Foundation, Inc.
3 Contributed by Stephane Carrez (stcarrez@nerim.fr)
5 This file is part of BFD, the Binary File Descriptor library.
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
22 #ifndef _ELF32_M68HC1X_H
23 #define _ELF32_M68HC1X_H
27 #include "elf/m68hc11.h"
29 /* Name of symbols exported by HC11/HC12 linker when there is a memory
31 #define BFD_M68HC11_BANK_START_NAME "__bank_start"
32 #define BFD_M68HC11_BANK_SIZE_NAME "__bank_size"
33 #define BFD_M68HC11_BANK_VIRTUAL_NAME "__bank_virtual"
35 /* Set and control ELF flags in ELF header. */
36 extern bfd_boolean _bfd_m68hc11_elf_merge_private_bfd_data (bfd*,bfd*);
37 extern bfd_boolean _bfd_m68hc11_elf_set_private_flags (bfd*,flagword);
38 extern bfd_boolean _bfd_m68hc11_elf_print_private_bfd_data (bfd*, void*);
40 /* This hash entry is used to record a trampoline that must be generated
41 to call a far function using a normal calling convention ('jsr').
42 The trampoline is used when a pointer to a far function is used.
43 It takes care of installing the proper memory bank as well as creating
44 the 'call/rtc' calling convention. */
45 struct elf32_m68hc11_stub_hash_entry
47 /* Base hash table entry structure. */
48 struct bfd_hash_entry root;
50 /* The stub section. */
53 /* Offset within stub_sec of the beginning of this stub. */
56 /* Given the symbol's value and its section we can determine its final
57 value when building the stubs (so the stub knows where to jump. */
59 asection *target_section;
62 /* Placeholder for the parameters to compute memory page and physical address.
63 The following formulas are used:
66 %addr(sym) = (((sym - bank_virtual) & bank_mask) + bank_physical
67 %page(sym) = (((sym - bank_virtual) >> bank_shift) % 256
74 These parameters are obtained from the symbol table by looking
77 __bank_start Symbol marking the start of memory bank window
79 __bank_virtual Logical address of symbols for which the transformation
81 __bank_page_size Size in bytes of page size (this is *NOT* the memory
82 bank window size and the window size is always
83 less or equal to the page size)
85 For 68HC12, the window is at 0x8000 and the page size is 16K (full window).
86 For 68HC11 this is board specific (implemented by external hardware). */
88 struct m68hc11_page_info
91 bfd_vma bank_physical;
92 bfd_vma bank_physical_end;
96 int bank_param_initialized;
97 bfd_vma trampoline_addr;
100 struct m68hc11_elf_link_hash_table
102 struct elf_link_hash_table root;
103 struct m68hc11_page_info pinfo;
105 /* The stub hash table. */
106 struct bfd_hash_table* stub_hash_table;
108 /* Linker stub bfd. */
111 asection* stub_section;
112 asection* tramp_section;
114 /* Linker call-backs. */
115 asection * (*add_stub_section) (const char *, asection *);
117 /* Assorted information used by elf32_hppa_size_stubs. */
118 unsigned int bfd_count;
120 asection **input_list;
122 /* Small local sym cache. */
123 struct sym_cache sym_cache;
125 bfd_boolean (* size_one_stub) (struct bfd_hash_entry*, void*);
126 bfd_boolean (* build_one_stub) (struct bfd_hash_entry*, void*);
129 /* Get the Sparc64 ELF linker hash table from a link_info structure. */
131 #define m68hc11_elf_hash_table(p) \
132 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
133 == M68HC11_ELF_DATA ? ((struct m68hc11_elf_link_hash_table *) ((p)->hash)) : NULL)
135 /* Create a 68HC11/68HC12 ELF linker hash table. */
137 extern struct m68hc11_elf_link_hash_table* m68hc11_elf_hash_table_create
140 extern void m68hc11_elf_get_bank_parameters (struct bfd_link_info*);
142 /* Return 1 if the address is in banked memory.
143 This can be applied to a virtual address and to a physical address. */
144 extern int m68hc11_addr_is_banked (struct m68hc11_page_info*, bfd_vma);
146 /* Return the physical address seen by the processor, taking
147 into account banked memory. */
148 extern bfd_vma m68hc11_phys_addr (struct m68hc11_page_info*, bfd_vma);
150 /* Return the page number corresponding to an address in banked memory. */
151 extern bfd_vma m68hc11_phys_page (struct m68hc11_page_info*, bfd_vma);
153 bfd_reloc_status_type m68hc11_elf_ignore_reloc
154 (bfd *abfd, arelent *reloc_entry,
155 asymbol *symbol, void *data, asection *input_section,
156 bfd *output_bfd, char **error_message);
157 bfd_reloc_status_type m68hc11_elf_special_reloc
158 (bfd *abfd, arelent *reloc_entry,
159 asymbol *symbol, void *data, asection *input_section,
160 bfd *output_bfd, char **error_message);
162 bfd_boolean elf32_m68hc11_check_relocs
163 (bfd * abfd, struct bfd_link_info * info,
164 asection * sec, const Elf_Internal_Rela * relocs);
165 bfd_boolean elf32_m68hc11_relocate_section
166 (bfd *output_bfd, struct bfd_link_info *info,
167 bfd *input_bfd, asection *input_section,
168 bfd_byte *contents, Elf_Internal_Rela *relocs,
169 Elf_Internal_Sym *local_syms, asection **local_sections);
171 bfd_boolean elf32_m68hc11_add_symbol_hook
172 (bfd *abfd, struct bfd_link_info *info,
173 Elf_Internal_Sym *sym, const char **namep,
174 flagword *flagsp, asection **secp,
177 void elf32_m68hc11_merge_symbol_attribute
178 (struct elf_link_hash_entry *, const Elf_Internal_Sym *,
179 bfd_boolean, bfd_boolean);
181 /* Tweak the OSABI field of the elf header. */
183 extern void elf32_m68hc11_post_process_headers (bfd*, struct bfd_link_info*);
185 int elf32_m68hc11_setup_section_lists (bfd *, struct bfd_link_info *);
187 bfd_boolean elf32_m68hc11_size_stubs
188 (bfd *, bfd *, struct bfd_link_info *,
189 asection * (*) (const char *, asection *));
191 bfd_boolean elf32_m68hc11_build_stubs (bfd* abfd, struct bfd_link_info *);