1 /* Motorola 68HC11/68HC12-specific support for 32-bit ELF 2 Copyright (C) 2003-2016 Free Software Foundation, Inc. 3 Contributed by Stephane Carrez (stcarrez (at) nerim.fr) 4 5 This file is part of BFD, the Binary File Descriptor library. 6 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. 11 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. 16 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. */ 21 22 #ifndef _ELF32_M68HC1X_H 23 #define _ELF32_M68HC1X_H 24 25 #include "elf-bfd.h" 26 #include "bfdlink.h" 27 #include "elf/m68hc11.h" 28 29 /* Name of symbols exported by HC11/HC12 linker when there is a memory 30 bank window. */ 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" 34 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*); 39 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 46 { 47 /* Base hash table entry structure. */ 48 struct bfd_hash_entry root; 49 50 /* The stub section. */ 51 asection *stub_sec; 52 53 /* Offset within stub_sec of the beginning of this stub. */ 54 bfd_vma stub_offset; 55 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. */ 58 bfd_vma target_value; 59 asection *target_section; 60 }; 61 62 /* Placeholder for the parameters to compute memory page and physical address. 63 The following formulas are used: 64 65 sym > bank_virtual => 66 %addr(sym) = (((sym - bank_virtual) & bank_mask) + bank_physical 67 %page(sym) = (((sym - bank_virtual) >> bank_shift) % 256 68 69 sym < bank_virtual => 70 %addr(sym) = sym 71 %page(sym) = 0 72 73 74 These parameters are obtained from the symbol table by looking 75 at the following: 76 77 __bank_start Symbol marking the start of memory bank window 78 (bank_physical) 79 __bank_virtual Logical address of symbols for which the transformation 80 must be computed 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) 84 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). */ 87 88 struct m68hc11_page_info 89 { 90 bfd_vma bank_virtual; 91 bfd_vma bank_physical; 92 bfd_vma bank_physical_end; 93 bfd_vma bank_mask; 94 bfd_vma bank_size; 95 int bank_shift; 96 int bank_param_initialized; 97 bfd_vma trampoline_addr; 98 }; 99 100 struct m68hc11_elf_link_hash_table 101 { 102 struct elf_link_hash_table root; 103 struct m68hc11_page_info pinfo; 104 105 /* The stub hash table. */ 106 struct bfd_hash_table* stub_hash_table; 107 108 /* Linker stub bfd. */ 109 bfd *stub_bfd; 110 111 asection* stub_section; 112 asection* tramp_section; 113 114 /* Linker call-backs. */ 115 asection * (*add_stub_section) (const char *, asection *); 116 117 /* Assorted information used by elf32_hppa_size_stubs. */ 118 unsigned int bfd_count; 119 int top_index; 120 asection **input_list; 121 122 /* Small local sym cache. */ 123 struct sym_cache sym_cache; 124 125 bfd_boolean (* size_one_stub) (struct bfd_hash_entry*, void*); 126 bfd_boolean (* build_one_stub) (struct bfd_hash_entry*, void*); 127 }; 128 129 /* Get the Sparc64 ELF linker hash table from a link_info structure. */ 130 131 #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) 134 135 /* Create a 68HC11/68HC12 ELF linker hash table. */ 136 137 extern struct m68hc11_elf_link_hash_table* m68hc11_elf_hash_table_create 138 (bfd*); 139 140 extern void m68hc11_elf_get_bank_parameters (struct bfd_link_info*); 141 142 /* 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); 145 146 /* 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); 149 150 /* Return the page number corresponding to an address in banked memory. */ 151 extern bfd_vma m68hc11_phys_page (struct m68hc11_page_info*, bfd_vma); 152 153 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); 161 162 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); 170 171 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, 175 bfd_vma *valp); 176 177 void elf32_m68hc11_merge_symbol_attribute 178 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, 179 bfd_boolean, bfd_boolean); 180 181 /* Tweak the OSABI field of the elf header. */ 182 183 extern void elf32_m68hc11_post_process_headers (bfd*, struct bfd_link_info*); 184 185 int elf32_m68hc11_setup_section_lists (bfd *, struct bfd_link_info *); 186 187 bfd_boolean elf32_m68hc11_size_stubs 188 (bfd *, bfd *, struct bfd_link_info *, 189 asection * (*) (const char *, asection *)); 190 191 bfd_boolean elf32_m68hc11_build_stubs (bfd* abfd, struct bfd_link_info *); 192 #endif 193
