1 /* Motorola 68HC11/68HC12-specific support for 32-bit ELF
2 Copyright (C) 2003-2017 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
37 (bfd *, struct bfd_link_info *);
38 extern bfd_boolean _bfd_m68hc11_elf_set_private_flags (bfd*,flagword);
39 extern bfd_boolean _bfd_m68hc11_elf_print_private_bfd_data (bfd*, void*);
41 /* This hash entry is used to record a trampoline that must be generated
42 to call a far function using a normal calling convention ('jsr').
43 The trampoline is used when a pointer to a far function is used.
44 It takes care of installing the proper memory bank as well as creating
45 the 'call/rtc' calling convention. */
46 struct elf32_m68hc11_stub_hash_entry
48 /* Base hash table entry structure. */
49 struct bfd_hash_entry root;
51 /* The stub section. */
54 /* Offset within stub_sec of the beginning of this stub. */
57 /* Given the symbol's value and its section we can determine its final
58 value when building the stubs (so the stub knows where to jump. */
60 asection *target_section;
63 /* Placeholder for the parameters to compute memory page and physical address.
64 The following formulas are used:
67 %addr(sym) = (((sym - bank_virtual) & bank_mask) + bank_physical
68 %page(sym) = (((sym - bank_virtual) >> bank_shift) % 256
75 These parameters are obtained from the symbol table by looking
78 __bank_start Symbol marking the start of memory bank window
80 __bank_virtual Logical address of symbols for which the transformation
82 __bank_page_size Size in bytes of page size (this is *NOT* the memory
83 bank window size and the window size is always
84 less or equal to the page size)
86 For 68HC12, the window is at 0x8000 and the page size is 16K (full window).
87 For 68HC11 this is board specific (implemented by external hardware). */
89 struct m68hc11_page_info
92 bfd_vma bank_physical;
93 bfd_vma bank_physical_end;
97 int bank_param_initialized;
98 bfd_vma trampoline_addr;
101 struct m68hc11_elf_link_hash_table
103 struct elf_link_hash_table root;
104 struct m68hc11_page_info pinfo;
106 /* The stub hash table. */
107 struct bfd_hash_table* stub_hash_table;
109 /* Linker stub bfd. */
112 asection* stub_section;
113 asection* tramp_section;
115 /* Linker call-backs. */
116 asection * (*add_stub_section) (const char *, asection *);
118 /* Assorted information used by elf32_hppa_size_stubs. */
119 unsigned int bfd_count;
121 asection **input_list;
123 /* Small local sym cache. */
124 struct sym_cache sym_cache;
126 bfd_boolean (* size_one_stub) (struct bfd_hash_entry*, void*);
127 bfd_boolean (* build_one_stub) (struct bfd_hash_entry*, void*);
130 /* Get the Sparc64 ELF linker hash table from a link_info structure. */
132 #define m68hc11_elf_hash_table(p) \
133 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
134 == M68HC11_ELF_DATA ? ((struct m68hc11_elf_link_hash_table *) ((p)->hash)) : NULL)
136 /* Create a 68HC11/68HC12 ELF linker hash table. */
138 extern struct m68hc11_elf_link_hash_table* m68hc11_elf_hash_table_create
141 extern void m68hc11_elf_get_bank_parameters (struct bfd_link_info*);
143 /* Return 1 if the address is in banked memory.
144 This can be applied to a virtual address and to a physical address. */
145 extern int m68hc11_addr_is_banked (struct m68hc11_page_info*, bfd_vma);
147 /* Return the physical address seen by the processor, taking
148 into account banked memory. */
149 extern bfd_vma m68hc11_phys_addr (struct m68hc11_page_info*, bfd_vma);
151 /* Return the page number corresponding to an address in banked memory. */
152 extern bfd_vma m68hc11_phys_page (struct m68hc11_page_info*, bfd_vma);
154 bfd_reloc_status_type m68hc11_elf_ignore_reloc
155 (bfd *abfd, arelent *reloc_entry,
156 asymbol *symbol, void *data, asection *input_section,
157 bfd *output_bfd, char **error_message);
158 bfd_reloc_status_type m68hc11_elf_special_reloc
159 (bfd *abfd, arelent *reloc_entry,
160 asymbol *symbol, void *data, asection *input_section,
161 bfd *output_bfd, char **error_message);
163 bfd_boolean elf32_m68hc11_check_relocs
164 (bfd * abfd, struct bfd_link_info * info,
165 asection * sec, const Elf_Internal_Rela * relocs);
166 bfd_boolean elf32_m68hc11_relocate_section
167 (bfd *output_bfd, struct bfd_link_info *info,
168 bfd *input_bfd, asection *input_section,
169 bfd_byte *contents, Elf_Internal_Rela *relocs,
170 Elf_Internal_Sym *local_syms, asection **local_sections);
172 bfd_boolean elf32_m68hc11_add_symbol_hook
173 (bfd *abfd, struct bfd_link_info *info,
174 Elf_Internal_Sym *sym, const char **namep,
175 flagword *flagsp, asection **secp,
178 void elf32_m68hc11_merge_symbol_attribute
179 (struct elf_link_hash_entry *, const Elf_Internal_Sym *,
180 bfd_boolean, bfd_boolean);
182 /* Tweak the OSABI field of the elf header. */
184 extern void elf32_m68hc11_post_process_headers (bfd*, struct bfd_link_info*);
186 int elf32_m68hc11_setup_section_lists (bfd *, struct bfd_link_info *);
188 bfd_boolean elf32_m68hc11_size_stubs
189 (bfd *, bfd *, struct bfd_link_info *,
190 asection * (*) (const char *, asection *));
192 bfd_boolean elf32_m68hc11_build_stubs (bfd* abfd, struct bfd_link_info *);