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Diffstat (limited to 'bfd/elf32-m68hc1x.h')
| -rw-r--r-- | bfd/elf32-m68hc1x.h | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/bfd/elf32-m68hc1x.h b/bfd/elf32-m68hc1x.h new file mode 100644 index 0000000..e70c172 --- /dev/null +++ b/bfd/elf32-m68hc1x.h @@ -0,0 +1,205 @@ +/* Motorola 68HC11/68HC12-specific support for 32-bit ELF + Copyright 2003 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 bfd_boolean _bfd_m68hc11_elf_merge_private_bfd_data PARAMS ((bfd*,bfd*)); +extern bfd_boolean _bfd_m68hc11_elf_set_private_flags PARAMS ((bfd*,flagword)); +extern bfd_boolean _bfd_m68hc11_elf_print_private_bfd_data PARAMS ((bfd*,PTR)); + +/* 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) PARAMS ((const char *, asection *)); + + /* Assorted information used by elf32_hppa_size_stubs. */ + unsigned int bfd_count; + int top_index; + asection **input_list; + Elf_Internal_Sym **all_local_syms; + + /* Small local sym to section mapping cache. */ + struct sym_sec_cache sym_sec; + + bfd_boolean (* size_one_stub) PARAMS((struct bfd_hash_entry*, PTR)); + bfd_boolean (* build_one_stub) PARAMS((struct bfd_hash_entry*, PTR)); +}; + +/* Get the Sparc64 ELF linker hash table from a link_info structure. */ + +#define m68hc11_elf_hash_table(p) \ + ((struct m68hc11_elf_link_hash_table *) ((p)->hash)) + +/* Create a 68HC11/68HC12 ELF linker hash table. */ + +extern struct m68hc11_elf_link_hash_table* m68hc11_elf_hash_table_create + PARAMS ((bfd*)); +extern void m68hc11_elf_bfd_link_hash_table_free + PARAMS ((struct bfd_link_hash_table*)); + +extern void m68hc11_elf_get_bank_parameters + PARAMS ((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 + PARAMS ((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 + PARAMS ((struct m68hc11_page_info*, bfd_vma)); + +/* Return the page number corresponding to an address in banked memory. */ +extern bfd_vma m68hc11_phys_page + PARAMS ((struct m68hc11_page_info*, bfd_vma)); + +bfd_reloc_status_type m68hc11_elf_ignore_reloc + PARAMS ((bfd *abfd, arelent *reloc_entry, + asymbol *symbol, PTR data, asection *input_section, + bfd *output_bfd, char **error_message)); +bfd_reloc_status_type m68hc11_elf_special_reloc + PARAMS ((bfd *abfd, arelent *reloc_entry, + asymbol *symbol, PTR data, asection *input_section, + bfd *output_bfd, char **error_message)); + +/* GC mark and sweep. */ +asection *elf32_m68hc11_gc_mark_hook + PARAMS ((asection *sec, struct bfd_link_info *info, + Elf_Internal_Rela *rel, struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym)); +bfd_boolean elf32_m68hc11_gc_sweep_hook + PARAMS ((bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs)); +bfd_boolean elf32_m68hc11_check_relocs + PARAMS ((bfd * abfd, struct bfd_link_info * info, + asection * sec, const Elf_Internal_Rela * relocs)); +bfd_boolean elf32_m68hc11_relocate_section + PARAMS ((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)); + +bfd_boolean elf32_m68hc11_add_symbol_hook + PARAMS ((bfd *abfd, struct bfd_link_info *info, + const Elf_Internal_Sym *sym, const char **namep, + flagword *flagsp, asection **secp, + bfd_vma *valp)); + +/* Tweak the OSABI field of the elf header. */ + +extern void elf32_m68hc11_post_process_headers + PARAMS ((bfd*, struct bfd_link_info*)); + +int elf32_m68hc11_setup_section_lists + PARAMS ((bfd *, struct bfd_link_info *)); + +bfd_boolean elf32_m68hc11_size_stubs + PARAMS ((bfd *, bfd *, struct bfd_link_info *, + asection * (*) PARAMS ((const char *, asection *)))); + +bfd_boolean elf32_m68hc11_build_stubs + PARAMS ((bfd* abfd, struct bfd_link_info *)); +#endif |