| /* Motorola 68HC12-specific support for 32-bit ELF |
| Copyright (C) 1999-2024 Free Software Foundation, Inc. |
| Contributed by Stephane Carrez (stcarrez@nerim.fr) |
| (Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com)) |
| |
| 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. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf32-m68hc1x.h" |
| #include "elf/m68hc11.h" |
| #include "opcode/m68hc11.h" |
| |
| /* Relocation functions. */ |
| static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
| (bfd *, bfd_reloc_code_real_type); |
| static bool m68hc11_info_to_howto_rel |
| (bfd *, arelent *, Elf_Internal_Rela *); |
| |
| /* Trampoline generation. */ |
| |
| |
| /* Use REL instead of RELA to save space */ |
| #define USE_REL 1 |
| |
| /* The 68HC12 microcontroler has a memory bank switching system |
| with a 16Kb window in the 64Kb address space. The extended memory |
| is mapped in the 16Kb window (at 0x8000). The page register controls |
| which 16Kb bank is mapped. The call/rtc instructions take care of |
| bank switching in function calls/returns. |
| |
| For GNU Binutils to work, we consider there is a physical memory |
| at 0..0x0ffff and a kind of virtual memory above that. Symbols |
| in virtual memory have their addresses treated in a special way |
| when disassembling and when linking. |
| |
| For the linker to work properly, we must always relocate the virtual |
| memory as if it is mapped at 0x8000. When a 16-bit relocation is |
| made in the virtual memory, we check that it does not cross the |
| memory bank where it is used. This would involve a page change |
| which would be wrong. The 24-bit relocation is for that and it |
| treats the address as a physical address + page number. |
| |
| |
| Banked |
| Address Space |
| | | Page n |
| +---------------+ 0x1010000 |
| | | |
| | jsr _foo | |
| | .. | Page 3 |
| | _foo: | |
| +---------------+ 0x100C000 |
| | | |
| | call _bar | |
| | .. | Page 2 |
| | _bar: | |
| +---------------+ 0x1008000 |
| /------>| | |
| | | call _foo | Page 1 |
| | | | |
| | +---------------+ 0x1004000 |
| Physical | | | |
| Address Space | | | Page 0 |
| | | | |
| +-----------+ 0x00FFFF | +---------------+ 0x1000000 |
| | | | |
| | call _foo | | |
| | | | |
| +-----------+ 0x00BFFF -+---/ |
| | | | |
| | | | |
| | | 16K | |
| | | | |
| +-----------+ 0x008000 -+ |
| | | |
| | | |
| = = |
| | | |
| | | |
| +-----------+ 0000 |
| |
| |
| The 'call _foo' must be relocated with page 3 and 16-bit address |
| mapped at 0x8000. |
| |
| The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */ |
| static reloc_howto_type elf_m68hc11_howto_table[] = { |
| /* This reloc does nothing. */ |
| HOWTO (R_M68HC11_NONE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 8 bit absolute relocation */ |
| HOWTO (R_M68HC11_8, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_8", /* name */ |
| false, /* partial_inplace */ |
| 0x00ff, /* src_mask */ |
| 0x00ff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 8 bit absolute relocation (upper address) */ |
| HOWTO (R_M68HC11_HI8, /* type */ |
| 8, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_HI8", /* name */ |
| false, /* partial_inplace */ |
| 0x00ff, /* src_mask */ |
| 0x00ff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 8 bit absolute relocation (upper address) */ |
| HOWTO (R_M68HC11_LO8, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_LO8", /* name */ |
| false, /* partial_inplace */ |
| 0x00ff, /* src_mask */ |
| 0x00ff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 8 bit PC-rel relocation */ |
| HOWTO (R_M68HC11_PCREL_8, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_PCREL_8", /* name */ |
| false, /* partial_inplace */ |
| 0x00ff, /* src_mask */ |
| 0x00ff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A 16 bit absolute relocation */ |
| HOWTO (R_M68HC11_16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont /*bitfield */ , /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 32 bit absolute relocation. This one is never used for the |
| code relocation. It's used by gas for -gstabs generation. */ |
| HOWTO (R_M68HC11_32, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_32", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 3 bit absolute relocation */ |
| HOWTO (R_M68HC11_3B, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 3, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_4B", /* name */ |
| false, /* partial_inplace */ |
| 0x003, /* src_mask */ |
| 0x003, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 16 bit PC-rel relocation */ |
| HOWTO (R_M68HC11_PCREL_16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_PCREL_16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy */ |
| HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_M68HC11_GNU_VTINHERIT", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable member usage */ |
| HOWTO (R_M68HC11_GNU_VTENTRY, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| "R_M68HC11_GNU_VTENTRY", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 24 bit relocation */ |
| HOWTO (R_M68HC11_24, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 24, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| m68hc11_elf_special_reloc, /* special_function */ |
| "R_M68HC12_24", /* name */ |
| false, /* partial_inplace */ |
| 0xffffff, /* src_mask */ |
| 0xffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 16-bit low relocation */ |
| HOWTO (R_M68HC11_LO16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| m68hc11_elf_special_reloc,/* special_function */ |
| "R_M68HC12_LO16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A page relocation */ |
| HOWTO (R_M68HC11_PAGE, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| m68hc11_elf_special_reloc,/* special_function */ |
| "R_M68HC12_PAGE", /* name */ |
| false, /* partial_inplace */ |
| 0x00ff, /* src_mask */ |
| 0x00ff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| EMPTY_HOWTO (14), |
| |
| /* A 16 bit absolute relocation. */ |
| HOWTO (R_M68HC12_16B, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_16B", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 9 bit PC-rel relocation. */ |
| HOWTO (R_M68HC12_PCREL_9, /* type */ |
| 1, /* rightshift */ |
| 2, /* size */ |
| 10, /* bitsize (result is >>1) */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_PCREL_9", /* name */ |
| true, /* partial_inplace */ |
| 0xfe00, /* src_mask */ |
| 0x01ff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A 10 bit PC-rel relocation. */ |
| HOWTO (R_M68HC12_PCREL_10, /* type */ |
| 1, /* rightshift */ |
| 2, /* size */ |
| 11, /* bitsize (result is >>1) */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_PCREL_10", /* name */ |
| true, /* partial_inplace */ |
| 0xfc00, /* src_mask */ |
| 0x03ff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A 8 bit absolute relocation (upper address). */ |
| HOWTO (R_M68HC12_HI8XG, /* type */ |
| 8, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_HI8XG", /* name */ |
| false, /* partial_inplace */ |
| 0x00ff, /* src_mask */ |
| 0x00ff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 8 bit absolute relocation (lower address). */ |
| HOWTO (R_M68HC12_LO8XG, /* type */ |
| 8, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M68HC12_LO8XG", /* name */ |
| false, /* partial_inplace */ |
| 0x00ff, /* src_mask */ |
| 0x00ff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Mark beginning of a jump instruction (any form). */ |
| HOWTO (R_M68HC11_RL_JUMP, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| m68hc11_elf_ignore_reloc, /* special_function */ |
| "R_M68HC12_RL_JUMP", /* name */ |
| true, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* Mark beginning of Gcc relaxation group instruction. */ |
| HOWTO (R_M68HC11_RL_GROUP, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| m68hc11_elf_ignore_reloc, /* special_function */ |
| "R_M68HC12_RL_GROUP", /* name */ |
| true, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| true), /* pcrel_offset */ |
| }; |
| |
| /* Map BFD reloc types to M68HC11 ELF reloc types. */ |
| |
| struct m68hc11_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned char elf_reloc_val; |
| }; |
| |
| static const struct m68hc11_reloc_map m68hc11_reloc_map[] = |
| { |
| {BFD_RELOC_NONE, R_M68HC11_NONE,}, |
| {BFD_RELOC_8, R_M68HC11_8}, |
| {BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8}, |
| {BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8}, |
| {BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8}, |
| {BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16}, |
| {BFD_RELOC_16, R_M68HC11_16}, |
| {BFD_RELOC_32, R_M68HC11_32}, |
| {BFD_RELOC_M68HC11_3B, R_M68HC11_3B}, |
| |
| {BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT}, |
| {BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY}, |
| |
| {BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16}, |
| {BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE}, |
| {BFD_RELOC_M68HC11_24, R_M68HC11_24}, |
| |
| {BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP}, |
| {BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP}, |
| |
| {BFD_RELOC_M68HC12_16B, R_M68HC12_16B}, |
| |
| {BFD_RELOC_M68HC12_9_PCREL, R_M68HC12_PCREL_9}, |
| {BFD_RELOC_M68HC12_10_PCREL, R_M68HC12_PCREL_10}, |
| {BFD_RELOC_M68HC12_HI8XG, R_M68HC12_HI8XG}, |
| {BFD_RELOC_M68HC12_LO8XG, R_M68HC12_LO8XG}, |
| }; |
| |
| static reloc_howto_type * |
| bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map); |
| i++) |
| { |
| if (m68hc11_reloc_map[i].bfd_reloc_val == code) |
| return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val]; |
| } |
| |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < (sizeof (elf_m68hc11_howto_table) |
| / sizeof (elf_m68hc11_howto_table[0])); |
| i++) |
| if (elf_m68hc11_howto_table[i].name != NULL |
| && strcasecmp (elf_m68hc11_howto_table[i].name, r_name) == 0) |
| return &elf_m68hc11_howto_table[i]; |
| |
| return NULL; |
| } |
| |
| /* Set the howto pointer for an M68HC11 ELF reloc. */ |
| |
| static bool |
| m68hc11_info_to_howto_rel (bfd *abfd, |
| arelent *cache_ptr, Elf_Internal_Rela *dst) |
| { |
| unsigned int r_type; |
| |
| r_type = ELF32_R_TYPE (dst->r_info); |
| if (r_type >= (unsigned int) R_M68HC11_max) |
| { |
| /* xgettext:c-format */ |
| _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| abfd, r_type); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; |
| return true; |
| } |
| |
| |
| /* Far trampoline generation. */ |
| |
| /* Build a 68HC12 trampoline stub. */ |
| static bool |
| m68hc12_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| { |
| struct elf32_m68hc11_stub_hash_entry *stub_entry; |
| struct bfd_link_info *info; |
| struct m68hc11_elf_link_hash_table *htab; |
| asection *stub_sec; |
| bfd *stub_bfd; |
| bfd_byte *loc; |
| bfd_vma sym_value, phys_page, phys_addr; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; |
| info = (struct bfd_link_info *) in_arg; |
| |
| /* Fail if the target section could not be assigned to an output |
| section. The user should fix his linker script. */ |
| if (stub_entry->target_section->output_section == NULL |
| && info->non_contiguous_regions) |
| info->callbacks->einfo (_("%F%P: Could not assign `%pA' to an output section. " |
| "Retry without --enable-non-contiguous-regions.\n"), |
| stub_entry->target_section); |
| |
| htab = m68hc11_elf_hash_table (info); |
| |
| stub_sec = stub_entry->stub_sec; |
| |
| /* Make a note of the offset within the stubs for this entry. */ |
| stub_entry->stub_offset = stub_sec->size; |
| stub_sec->size += 7; |
| loc = stub_sec->contents + stub_entry->stub_offset; |
| |
| stub_bfd = stub_sec->owner; |
| |
| /* Create the trampoline call stub: |
| |
| ldy #%addr(symbol) |
| call %page(symbol), __trampoline |
| |
| */ |
| sym_value = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value); |
| phys_page = m68hc11_phys_page (&htab->pinfo, sym_value); |
| |
| /* ldy #%page(sym) */ |
| bfd_put_8 (stub_bfd, 0xCD, loc); |
| bfd_put_16 (stub_bfd, phys_addr, loc + 1); |
| loc += 3; |
| |
| /* call %page(sym), __trampoline */ |
| bfd_put_8 (stub_bfd, 0x4a, loc); |
| bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1); |
| bfd_put_8 (stub_bfd, phys_page, loc + 3); |
| |
| return true; |
| } |
| |
| /* As above, but don't actually build the stub. Just bump offset so |
| we know stub section sizes. */ |
| |
| static bool |
| m68hc12_elf_size_one_stub (struct bfd_hash_entry *gen_entry, |
| void *in_arg ATTRIBUTE_UNUSED) |
| { |
| struct elf32_m68hc11_stub_hash_entry *stub_entry; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; |
| |
| stub_entry->stub_sec->size += 7; |
| return true; |
| } |
| |
| /* Create a 68HC12 ELF linker hash table. */ |
| |
| static struct bfd_link_hash_table * |
| m68hc12_elf_bfd_link_hash_table_create (bfd *abfd) |
| { |
| struct m68hc11_elf_link_hash_table *ret; |
| |
| ret = m68hc11_elf_hash_table_create (abfd); |
| if (ret == (struct m68hc11_elf_link_hash_table *) NULL) |
| return NULL; |
| |
| ret->size_one_stub = m68hc12_elf_size_one_stub; |
| ret->build_one_stub = m68hc12_elf_build_one_stub; |
| |
| return &ret->root.root; |
| } |
| |
| static bool |
| m68hc12_elf_set_mach_from_flags (bfd *abfd) |
| { |
| flagword flags = elf_elfheader (abfd)->e_flags; |
| |
| switch (flags & EF_M68HC11_MACH_MASK) |
| { |
| case EF_M68HC12_MACH: |
| bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812); |
| break; |
| case EF_M68HCS12_MACH: |
| bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812s); |
| break; |
| case EF_M68HC11_GENERIC: |
| bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, |
| bfd_mach_m6812_default); |
| break; |
| default: |
| return false; |
| } |
| return true; |
| } |
| |
| /* Specific sections: |
| - The .page0 is a data section that is mapped in [0x0000..0x00FF]. |
| Page0 accesses are faster on the M68HC12. |
| - The .vectors is the section that represents the interrupt |
| vectors. */ |
| static const struct bfd_elf_special_section elf32_m68hc12_special_sections[] = |
| { |
| { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC }, |
| { NULL, 0, 0, 0, 0 } |
| }; |
| |
| #define ELF_ARCH bfd_arch_m68hc12 |
| #define ELF_TARGET_ID M68HC11_ELF_DATA |
| #define ELF_MACHINE_CODE EM_68HC12 |
| #define ELF_MAXPAGESIZE 0x1000 |
| |
| #define TARGET_BIG_SYM m68hc12_elf32_vec |
| #define TARGET_BIG_NAME "elf32-m68hc12" |
| |
| #define elf_info_to_howto NULL |
| #define elf_info_to_howto_rel m68hc11_info_to_howto_rel |
| #define elf_backend_check_relocs elf32_m68hc11_check_relocs |
| #define elf_backend_relocate_section elf32_m68hc11_relocate_section |
| #define elf_backend_object_p m68hc12_elf_set_mach_from_flags |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_special_sections elf32_m68hc12_special_sections |
| #define elf_backend_init_file_header elf32_m68hc11_init_file_header |
| #define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook |
| #define elf_backend_merge_symbol_attribute elf32_m68hc11_merge_symbol_attribute |
| |
| #define bfd_elf32_bfd_link_hash_table_create \ |
| m68hc12_elf_bfd_link_hash_table_create |
| #define bfd_elf32_bfd_merge_private_bfd_data \ |
| _bfd_m68hc11_elf_merge_private_bfd_data |
| #define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags |
| #define bfd_elf32_bfd_print_private_bfd_data \ |
| _bfd_m68hc11_elf_print_private_bfd_data |
| |
| #include "elf32-target.h" |