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- /* Motorola 68HC11/68HC12-specific support for 32-bit ELF
- Copyright (C) 2003-2022 Free Software Foundation, Inc.
- Contributed by Stephane Carrez (stcarrez@nerim.fr)
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- #ifndef _ELF32_M68HC1X_H
- #define _ELF32_M68HC1X_H
- #include "elf-bfd.h"
- #include "bfdlink.h"
- #include "elf/m68hc11.h"
- /* Name of symbols exported by HC11/HC12 linker when there is a memory
- bank window. */
- #define BFD_M68HC11_BANK_START_NAME "__bank_start"
- #define BFD_M68HC11_BANK_SIZE_NAME "__bank_size"
- #define BFD_M68HC11_BANK_VIRTUAL_NAME "__bank_virtual"
- /* Set and control ELF flags in ELF header. */
- extern bool _bfd_m68hc11_elf_merge_private_bfd_data
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_m68hc11_elf_set_private_flags (bfd*,flagword);
- extern bool _bfd_m68hc11_elf_print_private_bfd_data (bfd*, void*);
- /* This hash entry is used to record a trampoline that must be generated
- to call a far function using a normal calling convention ('jsr').
- The trampoline is used when a pointer to a far function is used.
- It takes care of installing the proper memory bank as well as creating
- the 'call/rtc' calling convention. */
- struct elf32_m68hc11_stub_hash_entry
- {
- /* Base hash table entry structure. */
- struct bfd_hash_entry root;
- /* The stub section. */
- asection *stub_sec;
- /* Offset within stub_sec of the beginning of this stub. */
- bfd_vma stub_offset;
- /* Given the symbol's value and its section we can determine its final
- value when building the stubs (so the stub knows where to jump. */
- bfd_vma target_value;
- asection *target_section;
- };
- /* Placeholder for the parameters to compute memory page and physical address.
- The following formulas are used:
- sym > bank_virtual =>
- %addr(sym) = (((sym - bank_virtual) & bank_mask) + bank_physical
- %page(sym) = (((sym - bank_virtual) >> bank_shift) % 256
- sym < bank_virtual =>
- %addr(sym) = sym
- %page(sym) = 0
- These parameters are obtained from the symbol table by looking
- at the following:
- __bank_start Symbol marking the start of memory bank window
- (bank_physical)
- __bank_virtual Logical address of symbols for which the transformation
- must be computed
- __bank_page_size Size in bytes of page size (this is *NOT* the memory
- bank window size and the window size is always
- less or equal to the page size)
- For 68HC12, the window is at 0x8000 and the page size is 16K (full window).
- For 68HC11 this is board specific (implemented by external hardware). */
- struct m68hc11_page_info
- {
- bfd_vma bank_virtual;
- bfd_vma bank_physical;
- bfd_vma bank_physical_end;
- bfd_vma bank_mask;
- bfd_vma bank_size;
- int bank_shift;
- int bank_param_initialized;
- bfd_vma trampoline_addr;
- };
- struct m68hc11_elf_link_hash_table
- {
- struct elf_link_hash_table root;
- struct m68hc11_page_info pinfo;
- /* The stub hash table. */
- struct bfd_hash_table* stub_hash_table;
- /* Linker stub bfd. */
- bfd *stub_bfd;
- asection* stub_section;
- asection* tramp_section;
- /* Linker call-backs. */
- asection * (*add_stub_section) (const char *, asection *);
- /* Assorted information used by elf32_hppa_size_stubs. */
- unsigned int bfd_count;
- int top_index;
- asection **input_list;
- bool (* size_one_stub) (struct bfd_hash_entry*, void*);
- bool (* build_one_stub) (struct bfd_hash_entry*, void*);
- };
- /* Get the Sparc64 ELF linker hash table from a link_info structure. */
- #define m68hc11_elf_hash_table(p) \
- ((is_elf_hash_table ((p)->hash) \
- && elf_hash_table_id (elf_hash_table (p)) == M68HC11_ELF_DATA) \
- ? (struct m68hc11_elf_link_hash_table *) (p)->hash : NULL)
- /* Create a 68HC11/68HC12 ELF linker hash table. */
- extern struct m68hc11_elf_link_hash_table* m68hc11_elf_hash_table_create
- (bfd*);
- extern void m68hc11_elf_get_bank_parameters (struct bfd_link_info*);
- /* Return 1 if the address is in banked memory.
- This can be applied to a virtual address and to a physical address. */
- extern int m68hc11_addr_is_banked (struct m68hc11_page_info*, bfd_vma);
- /* Return the physical address seen by the processor, taking
- into account banked memory. */
- extern bfd_vma m68hc11_phys_addr (struct m68hc11_page_info*, bfd_vma);
- /* Return the page number corresponding to an address in banked memory. */
- extern bfd_vma m68hc11_phys_page (struct m68hc11_page_info*, bfd_vma);
- bfd_reloc_status_type m68hc11_elf_ignore_reloc
- (bfd *abfd, arelent *reloc_entry,
- asymbol *symbol, void *data, asection *input_section,
- bfd *output_bfd, char **error_message);
- bfd_reloc_status_type m68hc11_elf_special_reloc
- (bfd *abfd, arelent *reloc_entry,
- asymbol *symbol, void *data, asection *input_section,
- bfd *output_bfd, char **error_message);
- bool elf32_m68hc11_check_relocs
- (bfd * abfd, struct bfd_link_info * info,
- asection * sec, const Elf_Internal_Rela * relocs);
- int elf32_m68hc11_relocate_section
- (bfd *output_bfd, struct bfd_link_info *info,
- bfd *input_bfd, asection *input_section,
- bfd_byte *contents, Elf_Internal_Rela *relocs,
- Elf_Internal_Sym *local_syms, asection **local_sections);
- bool elf32_m68hc11_add_symbol_hook
- (bfd *abfd, struct bfd_link_info *info,
- Elf_Internal_Sym *sym, const char **namep,
- flagword *flagsp, asection **secp,
- bfd_vma *valp);
- void elf32_m68hc11_merge_symbol_attribute
- (struct elf_link_hash_entry *, unsigned int, bool, bool);
- /* Tweak the OSABI field of the elf header. */
- extern bool elf32_m68hc11_init_file_header (bfd*, struct bfd_link_info*);
- int elf32_m68hc11_setup_section_lists (bfd *, struct bfd_link_info *);
- bool elf32_m68hc11_size_stubs
- (bfd *, bfd *, struct bfd_link_info *,
- asection * (*) (const char *, asection *));
- bool elf32_m68hc11_build_stubs (bfd* abfd, struct bfd_link_info *);
- #endif
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