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/* Matsushita 10300 specific support for 32-bit ELF
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Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/mn10300.h"
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struct elf32_mn10300_link_hash_entry
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{
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/* The basic elf link hash table entry. */
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struct elf_link_hash_entry root;
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/* For function symbols, the number of times this function is
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called directly (ie by name). */
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unsigned int direct_calls;
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/* For function symbols, the size of this function's stack
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(if <= 255 bytes). We stuff this into "call" instructions
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to this target when it's valid and profitable to do so.
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This does not include stack allocated by movm! */
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unsigned char stack_size;
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/* For function symbols, arguments (if any) for movm instruction
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in the prologue. We stuff this value into "call" instructions
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to the target when it's valid and profitable to do so. */
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unsigned char movm_args;
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/* For funtion symbols, the amount of stack space that would be allocated
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by the movm instruction. This is redundant with movm_args, but we
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add it to the hash table to avoid computing it over and over. */
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unsigned char movm_stack_size;
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/* When set, convert all "call" instructions to this target into "calls"
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instructions. */
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#define MN10300_CONVERT_CALL_TO_CALLS 0x1
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/* Used to mark functions which have had redundant parts of their
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prologue deleted. */
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#define MN10300_DELETED_PROLOGUE_BYTES 0x2
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unsigned char flags;
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};
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/* We derive a hash table from the main elf linker hash table so
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we can store state variables and a secondary hash table without
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resorting to global variables. */
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struct elf32_mn10300_link_hash_table
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{
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/* The main hash table. */
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struct elf_link_hash_table root;
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/* A hash table for static functions. We could derive a new hash table
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instead of using the full elf32_mn10300_link_hash_table if we wanted
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to save some memory. */
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struct elf32_mn10300_link_hash_table *static_hash_table;
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/* Random linker state flags. */
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#define MN10300_HASH_ENTRIES_INITIALIZED 0x1
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char flags;
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};
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/* For MN10300 linker hash table. */
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/* Get the MN10300 ELF linker hash table from a link_info structure. */
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#define elf32_mn10300_hash_table(p) \
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((struct elf32_mn10300_link_hash_table *) ((p)->hash))
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#define elf32_mn10300_link_hash_traverse(table, func, info) \
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(elf_link_hash_traverse \
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(&(table)->root, \
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(boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
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(info)))
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static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
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PARAMS ((bfd *));
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void mn10300_info_to_howto
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
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static boolean mn10300_elf_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static asection *mn10300_elf_gc_mark_hook
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PARAMS ((bfd *, struct bfd_link_info *info, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static boolean mn10300_elf_relax_delete_bytes
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PARAMS ((bfd *, asection *, bfd_vma, int));
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static boolean mn10300_elf_symbol_address_p
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PARAMS ((bfd *, asection *, Elf32_External_Sym *, bfd_vma));
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static boolean elf32_mn10300_finish_hash_table_entry
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PARAMS ((struct bfd_hash_entry *, PTR));
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static void compute_function_info
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PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
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bfd_vma, unsigned char *));
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/* We have to use RELA instructions since md_apply_fix3 in the assembler
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does absolutely nothing. */
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#define USE_RELA
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static reloc_howto_type elf_mn10300_howto_table[] =
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{
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/* Dummy relocation. Does nothing. */
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HOWTO (R_MN10300_NONE,
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0,
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2,
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16,
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false,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_MN10300_NONE",
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false,
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0,
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0,
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false),
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/* Standard 32 bit reloc. */
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HOWTO (R_MN10300_32,
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0,
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2,
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32,
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false,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_MN10300_32",
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false,
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0xffffffff,
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0xffffffff,
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false),
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/* Standard 16 bit reloc. */
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HOWTO (R_MN10300_16,
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0,
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1,
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16,
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false,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_MN10300_16",
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false,
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0xffff,
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0xffff,
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false),
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/* Standard 8 bit reloc. */
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HOWTO (R_MN10300_8,
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0,
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0,
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8,
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false,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_MN10300_8",
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false,
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0xff,
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0xff,
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false),
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/* Standard 32bit pc-relative reloc. */
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HOWTO (R_MN10300_PCREL32,
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0,
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2,
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32,
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true,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_MN10300_PCREL32",
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false,
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0xffffffff,
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0xffffffff,
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true),
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/* Standard 16bit pc-relative reloc. */
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HOWTO (R_MN10300_PCREL16,
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0,
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1,
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16,
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true,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_MN10300_PCREL16",
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false,
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0xffff,
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0xffff,
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true),
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/* Standard 8 pc-relative reloc. */
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HOWTO (R_MN10300_PCREL8,
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0,
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0,
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8,
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true,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_MN10300_PCREL8",
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false,
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0xff,
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0xff,
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true),
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/* GNU extension to record C++ vtable hierarchy */
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HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_MN10300_GNU_VTINHERIT", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* GNU extension to record C++ vtable member usage */
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HOWTO (R_MN10300_GNU_VTENTRY, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_MN10300_GNU_VTENTRY", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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| 254 |
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/* Standard 24 bit reloc. */
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HOWTO (R_MN10300_24,
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0,
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2,
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| 258 |
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24,
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false,
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0,
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complain_overflow_bitfield,
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bfd_elf_generic_reloc,
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"R_MN10300_24",
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false,
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0xffffff,
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0xffffff,
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false),
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| 269 |
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};
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| 270 |
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| 271 |
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struct mn10300_reloc_map
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| 272 |
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{
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| 273 |
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bfd_reloc_code_real_type bfd_reloc_val;
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| 274 |
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unsigned char elf_reloc_val;
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| 275 |
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};
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| 276 |
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| 277 |
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static const struct mn10300_reloc_map mn10300_reloc_map[] =
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{
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| 279 |
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{ BFD_RELOC_NONE, R_MN10300_NONE, },
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| 280 |
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{ BFD_RELOC_32, R_MN10300_32, },
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| 281 |
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{ BFD_RELOC_16, R_MN10300_16, },
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| 282 |
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{ BFD_RELOC_8, R_MN10300_8, },
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| 283 |
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{ BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
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| 284 |
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{ BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
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| 285 |
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{ BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
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| 286 |
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{ BFD_RELOC_24, R_MN10300_24, },
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| 287 |
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{ BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
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| 288 |
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{ BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
|
| 289 |
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};
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| 290 |
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|
| 291 |
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static reloc_howto_type *
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| 292 |
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bfd_elf32_bfd_reloc_type_lookup (abfd, code)
|
| 293 |
|
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bfd *abfd ATTRIBUTE_UNUSED;
|
| 294 |
|
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bfd_reloc_code_real_type code;
|
| 295 |
|
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{
|
| 296 |
|
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unsigned int i;
|
| 297 |
|
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|
| 298 |
|
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for (i = 0;
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| 299 |
|
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i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
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| 300 |
|
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i++)
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| 301 |
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{
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| 302 |
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if (mn10300_reloc_map[i].bfd_reloc_val == code)
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| 303 |
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return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
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| 304 |
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}
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| 305 |
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| 306 |
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return NULL;
|
| 307 |
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}
|
| 308 |
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|
|
| 309 |
|
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/* Set the howto pointer for an MN10300 ELF reloc. */
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| 310 |
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|
| 311 |
|
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static void
|
| 312 |
|
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mn10300_info_to_howto (abfd, cache_ptr, dst)
|
| 313 |
|
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bfd *abfd ATTRIBUTE_UNUSED;
|
| 314 |
|
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arelent *cache_ptr;
|
| 315 |
|
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Elf32_Internal_Rela *dst;
|
| 316 |
|
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{
|
| 317 |
|
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unsigned int r_type;
|
| 318 |
|
|
|
| 319 |
|
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r_type = ELF32_R_TYPE (dst->r_info);
|
| 320 |
|
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BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
|
| 321 |
|
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cache_ptr->howto = &elf_mn10300_howto_table[r_type];
|
| 322 |
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}
|
| 323 |
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|
|
| 324 |
|
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/* Look through the relocs for a section during the first phase.
|
| 325 |
|
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Since we don't do .gots or .plts, we just need to consider the
|
| 326 |
|
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virtual table relocs for gc. */
|
| 327 |
|
|
|
| 328 |
|
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static boolean
|
| 329 |
|
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mn10300_elf_check_relocs (abfd, info, sec, relocs)
|
| 330 |
|
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bfd *abfd;
|
| 331 |
|
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struct bfd_link_info *info;
|
| 332 |
|
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asection *sec;
|
| 333 |
|
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const Elf_Internal_Rela *relocs;
|
| 334 |
|
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{
|
| 335 |
|
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Elf_Internal_Shdr *symtab_hdr;
|
| 336 |
|
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struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
|
| 337 |
|
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const Elf_Internal_Rela *rel;
|
| 338 |
|
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const Elf_Internal_Rela *rel_end;
|
| 339 |
|
|
|
| 340 |
|
|
if (info->relocateable)
|
| 341 |
|
|
return true;
|
| 342 |
|
|
|
| 343 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 344 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
| 345 |
|
|
sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
|
| 346 |
|
|
if (!elf_bad_symtab (abfd))
|
| 347 |
|
|
sym_hashes_end -= symtab_hdr->sh_info;
|
| 348 |
|
|
|
| 349 |
|
|
rel_end = relocs + sec->reloc_count;
|
| 350 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
| 351 |
|
|
{
|
| 352 |
|
|
struct elf_link_hash_entry *h;
|
| 353 |
|
|
unsigned long r_symndx;
|
| 354 |
|
|
|
| 355 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 356 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 357 |
|
|
h = NULL;
|
| 358 |
|
|
else
|
| 359 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
| 360 |
|
|
|
| 361 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 362 |
|
|
{
|
| 363 |
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
| 364 |
|
|
Reconstruct it for later use during GC. */
|
| 365 |
|
|
case R_MN10300_GNU_VTINHERIT:
|
| 366 |
|
|
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
| 367 |
|
|
return false;
|
| 368 |
|
|
break;
|
| 369 |
|
|
|
| 370 |
|
|
/* This relocation describes which C++ vtable entries are actually
|
| 371 |
|
|
used. Record for later use during GC. */
|
| 372 |
|
|
case R_MN10300_GNU_VTENTRY:
|
| 373 |
|
|
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
| 374 |
|
|
return false;
|
| 375 |
|
|
break;
|
| 376 |
|
|
}
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
return true;
|
| 380 |
|
|
}
|
| 381 |
|
|
|
| 382 |
|
|
/* Return the section that should be marked against GC for a given
|
| 383 |
|
|
relocation. */
|
| 384 |
|
|
|
| 385 |
|
|
static asection *
|
| 386 |
|
|
mn10300_elf_gc_mark_hook (abfd, info, rel, h, sym)
|
| 387 |
|
|
bfd *abfd;
|
| 388 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
| 389 |
|
|
Elf_Internal_Rela *rel;
|
| 390 |
|
|
struct elf_link_hash_entry *h;
|
| 391 |
|
|
Elf_Internal_Sym *sym;
|
| 392 |
|
|
{
|
| 393 |
|
|
if (h != NULL)
|
| 394 |
|
|
{
|
| 395 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 396 |
|
|
{
|
| 397 |
|
|
case R_MN10300_GNU_VTINHERIT:
|
| 398 |
|
|
case R_MN10300_GNU_VTENTRY:
|
| 399 |
|
|
break;
|
| 400 |
|
|
|
| 401 |
|
|
default:
|
| 402 |
|
|
switch (h->root.type)
|
| 403 |
|
|
{
|
| 404 |
|
|
case bfd_link_hash_defined:
|
| 405 |
|
|
case bfd_link_hash_defweak:
|
| 406 |
|
|
return h->root.u.def.section;
|
| 407 |
|
|
|
| 408 |
|
|
case bfd_link_hash_common:
|
| 409 |
|
|
return h->root.u.c.p->section;
|
| 410 |
|
|
|
| 411 |
|
|
default:
|
| 412 |
|
|
break;
|
| 413 |
|
|
}
|
| 414 |
|
|
}
|
| 415 |
|
|
}
|
| 416 |
|
|
else
|
| 417 |
|
|
{
|
| 418 |
|
|
if (!(elf_bad_symtab (abfd)
|
| 419 |
|
|
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
|
| 420 |
|
|
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
|
| 421 |
|
|
&& sym->st_shndx != SHN_COMMON))
|
| 422 |
|
|
{
|
| 423 |
|
|
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
| 424 |
|
|
}
|
| 425 |
|
|
}
|
| 426 |
|
|
|
| 427 |
|
|
return NULL;
|
| 428 |
|
|
}
|
| 429 |
|
|
|
| 430 |
|
|
/* Perform a relocation as part of a final link. */
|
| 431 |
|
|
static bfd_reloc_status_type
|
| 432 |
|
|
mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
|
| 433 |
|
|
input_section, contents, offset, value,
|
| 434 |
|
|
addend, info, sym_sec, is_local)
|
| 435 |
|
|
reloc_howto_type *howto;
|
| 436 |
|
|
bfd *input_bfd;
|
| 437 |
|
|
bfd *output_bfd ATTRIBUTE_UNUSED;
|
| 438 |
|
|
asection *input_section;
|
| 439 |
|
|
bfd_byte *contents;
|
| 440 |
|
|
bfd_vma offset;
|
| 441 |
|
|
bfd_vma value;
|
| 442 |
|
|
bfd_vma addend;
|
| 443 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
| 444 |
|
|
asection *sym_sec ATTRIBUTE_UNUSED;
|
| 445 |
|
|
int is_local ATTRIBUTE_UNUSED;
|
| 446 |
|
|
{
|
| 447 |
|
|
unsigned long r_type = howto->type;
|
| 448 |
|
|
bfd_byte *hit_data = contents + offset;
|
| 449 |
|
|
|
| 450 |
|
|
switch (r_type)
|
| 451 |
|
|
{
|
| 452 |
|
|
case R_MN10300_NONE:
|
| 453 |
|
|
return bfd_reloc_ok;
|
| 454 |
|
|
|
| 455 |
|
|
case R_MN10300_32:
|
| 456 |
|
|
value += addend;
|
| 457 |
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
| 458 |
|
|
return bfd_reloc_ok;
|
| 459 |
|
|
|
| 460 |
|
|
case R_MN10300_24:
|
| 461 |
|
|
value += addend;
|
| 462 |
|
|
|
| 463 |
|
|
if ((long)value > 0x7fffff || (long)value < -0x800000)
|
| 464 |
|
|
return bfd_reloc_overflow;
|
| 465 |
|
|
|
| 466 |
|
|
bfd_put_8 (input_bfd, value & 0xff, hit_data);
|
| 467 |
|
|
bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
|
| 468 |
|
|
bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
|
| 469 |
|
|
return bfd_reloc_ok;
|
| 470 |
|
|
|
| 471 |
|
|
case R_MN10300_16:
|
| 472 |
|
|
value += addend;
|
| 473 |
|
|
|
| 474 |
|
|
if ((long)value > 0x7fff || (long)value < -0x8000)
|
| 475 |
|
|
return bfd_reloc_overflow;
|
| 476 |
|
|
|
| 477 |
|
|
bfd_put_16 (input_bfd, value, hit_data);
|
| 478 |
|
|
return bfd_reloc_ok;
|
| 479 |
|
|
|
| 480 |
|
|
case R_MN10300_8:
|
| 481 |
|
|
value += addend;
|
| 482 |
|
|
|
| 483 |
|
|
if ((long)value > 0x7f || (long)value < -0x80)
|
| 484 |
|
|
return bfd_reloc_overflow;
|
| 485 |
|
|
|
| 486 |
|
|
bfd_put_8 (input_bfd, value, hit_data);
|
| 487 |
|
|
return bfd_reloc_ok;
|
| 488 |
|
|
|
| 489 |
|
|
case R_MN10300_PCREL8:
|
| 490 |
|
|
value -= (input_section->output_section->vma
|
| 491 |
|
|
+ input_section->output_offset);
|
| 492 |
|
|
value -= offset;
|
| 493 |
|
|
value += addend;
|
| 494 |
|
|
|
| 495 |
|
|
if ((long)value > 0xff || (long)value < -0x100)
|
| 496 |
|
|
return bfd_reloc_overflow;
|
| 497 |
|
|
|
| 498 |
|
|
bfd_put_8 (input_bfd, value, hit_data);
|
| 499 |
|
|
return bfd_reloc_ok;
|
| 500 |
|
|
|
| 501 |
|
|
case R_MN10300_PCREL16:
|
| 502 |
|
|
value -= (input_section->output_section->vma
|
| 503 |
|
|
+ input_section->output_offset);
|
| 504 |
|
|
value -= offset;
|
| 505 |
|
|
value += addend;
|
| 506 |
|
|
|
| 507 |
|
|
if ((long)value > 0xffff || (long)value < -0x10000)
|
| 508 |
|
|
return bfd_reloc_overflow;
|
| 509 |
|
|
|
| 510 |
|
|
bfd_put_16 (input_bfd, value, hit_data);
|
| 511 |
|
|
return bfd_reloc_ok;
|
| 512 |
|
|
|
| 513 |
|
|
case R_MN10300_PCREL32:
|
| 514 |
|
|
value -= (input_section->output_section->vma
|
| 515 |
|
|
+ input_section->output_offset);
|
| 516 |
|
|
value -= offset;
|
| 517 |
|
|
value += addend;
|
| 518 |
|
|
|
| 519 |
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
| 520 |
|
|
return bfd_reloc_ok;
|
| 521 |
|
|
|
| 522 |
|
|
case R_MN10300_GNU_VTINHERIT:
|
| 523 |
|
|
case R_MN10300_GNU_VTENTRY:
|
| 524 |
|
|
return bfd_reloc_ok;
|
| 525 |
|
|
|
| 526 |
|
|
default:
|
| 527 |
|
|
return bfd_reloc_notsupported;
|
| 528 |
|
|
}
|
| 529 |
|
|
}
|
| 530 |
|
|
|
| 531 |
|
|
|
| 532 |
|
|
/* Relocate an MN10300 ELF section. */
|
| 533 |
|
|
static boolean
|
| 534 |
|
|
mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
| 535 |
|
|
contents, relocs, local_syms, local_sections)
|
| 536 |
|
|
bfd *output_bfd;
|
| 537 |
|
|
struct bfd_link_info *info;
|
| 538 |
|
|
bfd *input_bfd;
|
| 539 |
|
|
asection *input_section;
|
| 540 |
|
|
bfd_byte *contents;
|
| 541 |
|
|
Elf_Internal_Rela *relocs;
|
| 542 |
|
|
Elf_Internal_Sym *local_syms;
|
| 543 |
|
|
asection **local_sections;
|
| 544 |
|
|
{
|
| 545 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 546 |
|
|
struct elf32_mn10300_link_hash_entry **sym_hashes;
|
| 547 |
|
|
Elf_Internal_Rela *rel, *relend;
|
| 548 |
|
|
|
| 549 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 550 |
|
|
sym_hashes = (struct elf32_mn10300_link_hash_entry **)
|
| 551 |
|
|
(elf_sym_hashes (input_bfd));
|
| 552 |
|
|
|
| 553 |
|
|
rel = relocs;
|
| 554 |
|
|
relend = relocs + input_section->reloc_count;
|
| 555 |
|
|
for (; rel < relend; rel++)
|
| 556 |
|
|
{
|
| 557 |
|
|
int r_type;
|
| 558 |
|
|
reloc_howto_type *howto;
|
| 559 |
|
|
unsigned long r_symndx;
|
| 560 |
|
|
Elf_Internal_Sym *sym;
|
| 561 |
|
|
asection *sec;
|
| 562 |
|
|
struct elf32_mn10300_link_hash_entry *h;
|
| 563 |
|
|
bfd_vma relocation;
|
| 564 |
|
|
bfd_reloc_status_type r;
|
| 565 |
|
|
|
| 566 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 567 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
| 568 |
|
|
howto = elf_mn10300_howto_table + r_type;
|
| 569 |
|
|
|
| 570 |
|
|
/* Just skip the vtable gc relocs. */
|
| 571 |
|
|
if (r_type == R_MN10300_GNU_VTINHERIT
|
| 572 |
|
|
|| r_type == R_MN10300_GNU_VTENTRY)
|
| 573 |
|
|
continue;
|
| 574 |
|
|
|
| 575 |
|
|
if (info->relocateable)
|
| 576 |
|
|
{
|
| 577 |
|
|
/* This is a relocateable link. We don't have to change
|
| 578 |
|
|
anything, unless the reloc is against a section symbol,
|
| 579 |
|
|
in which case we have to adjust according to where the
|
| 580 |
|
|
section symbol winds up in the output section. */
|
| 581 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 582 |
|
|
{
|
| 583 |
|
|
sym = local_syms + r_symndx;
|
| 584 |
|
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
| 585 |
|
|
{
|
| 586 |
|
|
sec = local_sections[r_symndx];
|
| 587 |
|
|
rel->r_addend += sec->output_offset + sym->st_value;
|
| 588 |
|
|
}
|
| 589 |
|
|
}
|
| 590 |
|
|
|
| 591 |
|
|
continue;
|
| 592 |
|
|
}
|
| 593 |
|
|
|
| 594 |
|
|
/* This is a final link. */
|
| 595 |
|
|
h = NULL;
|
| 596 |
|
|
sym = NULL;
|
| 597 |
|
|
sec = NULL;
|
| 598 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 599 |
|
|
{
|
| 600 |
|
|
sym = local_syms + r_symndx;
|
| 601 |
|
|
sec = local_sections[r_symndx];
|
| 602 |
|
|
relocation = (sec->output_section->vma
|
| 603 |
|
|
+ sec->output_offset
|
| 604 |
|
|
+ sym->st_value);
|
| 605 |
|
|
}
|
| 606 |
|
|
else
|
| 607 |
|
|
{
|
| 608 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
| 609 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
| 610 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
| 611 |
|
|
h = (struct elf32_mn10300_link_hash_entry *) h->root.root.u.i.link;
|
| 612 |
|
|
if (h->root.root.type == bfd_link_hash_defined
|
| 613 |
|
|
|| h->root.root.type == bfd_link_hash_defweak)
|
| 614 |
|
|
{
|
| 615 |
|
|
sec = h->root.root.u.def.section;
|
| 616 |
|
|
relocation = (h->root.root.u.def.value
|
| 617 |
|
|
+ sec->output_section->vma
|
| 618 |
|
|
+ sec->output_offset);
|
| 619 |
|
|
}
|
| 620 |
|
|
else if (h->root.root.type == bfd_link_hash_undefweak)
|
| 621 |
|
|
relocation = 0;
|
| 622 |
|
|
else
|
| 623 |
|
|
{
|
| 624 |
|
|
if (! ((*info->callbacks->undefined_symbol)
|
| 625 |
|
|
(info, h->root.root.root.string, input_bfd,
|
| 626 |
|
|
input_section, rel->r_offset, true)))
|
| 627 |
|
|
return false;
|
| 628 |
|
|
relocation = 0;
|
| 629 |
|
|
}
|
| 630 |
|
|
}
|
| 631 |
|
|
|
| 632 |
|
|
r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
|
| 633 |
|
|
input_section,
|
| 634 |
|
|
contents, rel->r_offset,
|
| 635 |
|
|
relocation, rel->r_addend,
|
| 636 |
|
|
info, sec, h == NULL);
|
| 637 |
|
|
|
| 638 |
|
|
if (r != bfd_reloc_ok)
|
| 639 |
|
|
{
|
| 640 |
|
|
const char *name;
|
| 641 |
|
|
const char *msg = (const char *)0;
|
| 642 |
|
|
|
| 643 |
|
|
if (h != NULL)
|
| 644 |
|
|
name = h->root.root.root.string;
|
| 645 |
|
|
else
|
| 646 |
|
|
{
|
| 647 |
|
|
name = (bfd_elf_string_from_elf_section
|
| 648 |
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
| 649 |
|
|
if (name == NULL || *name == '\0')
|
| 650 |
|
|
name = bfd_section_name (input_bfd, sec);
|
| 651 |
|
|
}
|
| 652 |
|
|
|
| 653 |
|
|
switch (r)
|
| 654 |
|
|
{
|
| 655 |
|
|
case bfd_reloc_overflow:
|
| 656 |
|
|
if (! ((*info->callbacks->reloc_overflow)
|
| 657 |
|
|
(info, name, howto->name, (bfd_vma) 0,
|
| 658 |
|
|
input_bfd, input_section, rel->r_offset)))
|
| 659 |
|
|
return false;
|
| 660 |
|
|
break;
|
| 661 |
|
|
|
| 662 |
|
|
case bfd_reloc_undefined:
|
| 663 |
|
|
if (! ((*info->callbacks->undefined_symbol)
|
| 664 |
|
|
(info, name, input_bfd, input_section,
|
| 665 |
|
|
rel->r_offset, true)))
|
| 666 |
|
|
return false;
|
| 667 |
|
|
break;
|
| 668 |
|
|
|
| 669 |
|
|
case bfd_reloc_outofrange:
|
| 670 |
|
|
msg = _("internal error: out of range error");
|
| 671 |
|
|
goto common_error;
|
| 672 |
|
|
|
| 673 |
|
|
case bfd_reloc_notsupported:
|
| 674 |
|
|
msg = _("internal error: unsupported relocation error");
|
| 675 |
|
|
goto common_error;
|
| 676 |
|
|
|
| 677 |
|
|
case bfd_reloc_dangerous:
|
| 678 |
|
|
msg = _("internal error: dangerous error");
|
| 679 |
|
|
goto common_error;
|
| 680 |
|
|
|
| 681 |
|
|
default:
|
| 682 |
|
|
msg = _("internal error: unknown error");
|
| 683 |
|
|
/* fall through */
|
| 684 |
|
|
|
| 685 |
|
|
common_error:
|
| 686 |
|
|
if (!((*info->callbacks->warning)
|
| 687 |
|
|
(info, msg, name, input_bfd, input_section,
|
| 688 |
|
|
rel->r_offset)))
|
| 689 |
|
|
return false;
|
| 690 |
|
|
break;
|
| 691 |
|
|
}
|
| 692 |
|
|
}
|
| 693 |
|
|
}
|
| 694 |
|
|
|
| 695 |
|
|
return true;
|
| 696 |
|
|
}
|
| 697 |
|
|
|
| 698 |
|
|
/* Finish initializing one hash table entry. */
|
| 699 |
|
|
static boolean
|
| 700 |
|
|
elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
|
| 701 |
|
|
struct bfd_hash_entry *gen_entry;
|
| 702 |
|
|
PTR in_args ATTRIBUTE_UNUSED;
|
| 703 |
|
|
{
|
| 704 |
|
|
struct elf32_mn10300_link_hash_entry *entry;
|
| 705 |
|
|
unsigned int byte_count = 0;
|
| 706 |
|
|
|
| 707 |
|
|
entry = (struct elf32_mn10300_link_hash_entry *)gen_entry;
|
| 708 |
|
|
|
| 709 |
|
|
/* If we already know we want to convert "call" to "calls" for calls
|
| 710 |
|
|
to this symbol, then return now. */
|
| 711 |
|
|
if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
|
| 712 |
|
|
return true;
|
| 713 |
|
|
|
| 714 |
|
|
/* If there are no named calls to this symbol, or there's nothing we
|
| 715 |
|
|
can move from the function itself into the "call" instruction, then
|
| 716 |
|
|
note that all "call" instructions should be converted into "calls"
|
| 717 |
|
|
instructions and return. */
|
| 718 |
|
|
if (entry->direct_calls == 0
|
| 719 |
|
|
|| (entry->stack_size == 0 && entry->movm_args == 0))
|
| 720 |
|
|
{
|
| 721 |
|
|
/* Make a note that we should convert "call" instructions to "calls"
|
| 722 |
|
|
instructions for calls to this symbol. */
|
| 723 |
|
|
entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
|
| 724 |
|
|
return true;
|
| 725 |
|
|
}
|
| 726 |
|
|
|
| 727 |
|
|
/* We may be able to move some instructions from the function itself into
|
| 728 |
|
|
the "call" instruction. Count how many bytes we might be able to
|
| 729 |
|
|
eliminate in the function itself. */
|
| 730 |
|
|
|
| 731 |
|
|
/* A movm instruction is two bytes. */
|
| 732 |
|
|
if (entry->movm_args)
|
| 733 |
|
|
byte_count += 2;
|
| 734 |
|
|
|
| 735 |
|
|
/* Count the insn to allocate stack space too. */
|
| 736 |
|
|
if (entry->stack_size > 0 && entry->stack_size <= 128)
|
| 737 |
|
|
byte_count += 3;
|
| 738 |
|
|
else if (entry->stack_size > 0 && entry->stack_size < 256)
|
| 739 |
|
|
byte_count += 4;
|
| 740 |
|
|
|
| 741 |
|
|
/* If using "call" will result in larger code, then turn all
|
| 742 |
|
|
the associated "call" instructions into "calls" instrutions. */
|
| 743 |
|
|
if (byte_count < entry->direct_calls)
|
| 744 |
|
|
entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
|
| 745 |
|
|
|
| 746 |
|
|
/* This routine never fails. */
|
| 747 |
|
|
return true;
|
| 748 |
|
|
}
|
| 749 |
|
|
|
| 750 |
|
|
/* This function handles relaxing for the mn10300.
|
| 751 |
|
|
|
| 752 |
|
|
There's quite a few relaxing opportunites available on the mn10300:
|
| 753 |
|
|
|
| 754 |
|
|
* calls:32 -> calls:16 2 bytes
|
| 755 |
|
|
* call:32 -> call:16 2 bytes
|
| 756 |
|
|
|
| 757 |
|
|
* call:32 -> calls:32 1 byte
|
| 758 |
|
|
* call:16 -> calls:16 1 byte
|
| 759 |
|
|
* These are done anytime using "calls" would result
|
| 760 |
|
|
in smaller code, or when necessary to preserve the
|
| 761 |
|
|
meaning of the program.
|
| 762 |
|
|
|
| 763 |
|
|
* call:32 varies
|
| 764 |
|
|
* call:16
|
| 765 |
|
|
* In some circumstances we can move instructions
|
| 766 |
|
|
from a function prologue into a "call" instruction.
|
| 767 |
|
|
This is only done if the resulting code is no larger
|
| 768 |
|
|
than the original code.
|
| 769 |
|
|
|
| 770 |
|
|
|
| 771 |
|
|
* jmp:32 -> jmp:16 2 bytes
|
| 772 |
|
|
* jmp:16 -> bra:8 1 byte
|
| 773 |
|
|
|
| 774 |
|
|
* If the previous instruction is a conditional branch
|
| 775 |
|
|
around the jump/bra, we may be able to reverse its condition
|
| 776 |
|
|
and change its target to the jump's target. The jump/bra
|
| 777 |
|
|
can then be deleted. 2 bytes
|
| 778 |
|
|
|
| 779 |
|
|
* mov abs32 -> mov abs16 1 or 2 bytes
|
| 780 |
|
|
|
| 781 |
|
|
* Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
|
| 782 |
|
|
- Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
|
| 783 |
|
|
|
| 784 |
|
|
* Most instructions which accept d32 can relax to d16 1 or 2 bytes
|
| 785 |
|
|
- Most instructions which accept d16 can relax to d8 1 or 2 bytes
|
| 786 |
|
|
|
| 787 |
|
|
We don't handle imm16->imm8 or d16->d8 as they're very rare
|
| 788 |
|
|
and somewhat more difficult to support. */
|
| 789 |
|
|
|
| 790 |
|
|
static boolean
|
| 791 |
|
|
mn10300_elf_relax_section (abfd, sec, link_info, again)
|
| 792 |
|
|
bfd *abfd;
|
| 793 |
|
|
asection *sec;
|
| 794 |
|
|
struct bfd_link_info *link_info;
|
| 795 |
|
|
boolean *again;
|
| 796 |
|
|
{
|
| 797 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 798 |
|
|
Elf_Internal_Rela *internal_relocs = NULL;
|
| 799 |
|
|
Elf_Internal_Rela *free_relocs = NULL;
|
| 800 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
| 801 |
|
|
bfd_byte *contents = NULL;
|
| 802 |
|
|
bfd_byte *free_contents = NULL;
|
| 803 |
|
|
Elf32_External_Sym *extsyms = NULL;
|
| 804 |
|
|
Elf32_External_Sym *free_extsyms = NULL;
|
| 805 |
|
|
struct elf32_mn10300_link_hash_table *hash_table;
|
| 806 |
|
|
|
| 807 |
|
|
/* Assume nothing changes. */
|
| 808 |
|
|
*again = false;
|
| 809 |
|
|
|
| 810 |
|
|
/* We need a pointer to the mn10300 specific hash table. */
|
| 811 |
|
|
hash_table = elf32_mn10300_hash_table (link_info);
|
| 812 |
|
|
|
| 813 |
|
|
/* Initialize fields in each hash table entry the first time through. */
|
| 814 |
|
|
if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
|
| 815 |
|
|
{
|
| 816 |
|
|
bfd *input_bfd;
|
| 817 |
|
|
|
| 818 |
|
|
/* Iterate over all the input bfds. */
|
| 819 |
|
|
for (input_bfd = link_info->input_bfds;
|
| 820 |
|
|
input_bfd != NULL;
|
| 821 |
|
|
input_bfd = input_bfd->link_next)
|
| 822 |
|
|
{
|
| 823 |
|
|
asection *section;
|
| 824 |
|
|
|
| 825 |
|
|
/* We're going to need all the symbols for each bfd. */
|
| 826 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 827 |
|
|
|
| 828 |
|
|
/* Get cached copy if it exists. */
|
| 829 |
|
|
if (symtab_hdr->contents != NULL)
|
| 830 |
|
|
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
| 831 |
|
|
else
|
| 832 |
|
|
{
|
| 833 |
|
|
/* Go get them off disk. */
|
| 834 |
|
|
extsyms = ((Elf32_External_Sym *)
|
| 835 |
|
|
bfd_malloc (symtab_hdr->sh_size));
|
| 836 |
|
|
if (extsyms == NULL)
|
| 837 |
|
|
goto error_return;
|
| 838 |
|
|
free_extsyms = extsyms;
|
| 839 |
|
|
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
| 840 |
|
|
|| (bfd_read (extsyms, 1, symtab_hdr->sh_size, input_bfd)
|
| 841 |
|
|
!= symtab_hdr->sh_size))
|
| 842 |
|
|
goto error_return;
|
| 843 |
|
|
}
|
| 844 |
|
|
|
| 845 |
|
|
/* Iterate over each section in this bfd. */
|
| 846 |
|
|
for (section = input_bfd->sections;
|
| 847 |
|
|
section != NULL;
|
| 848 |
|
|
section = section->next)
|
| 849 |
|
|
{
|
| 850 |
|
|
struct elf32_mn10300_link_hash_entry *hash;
|
| 851 |
|
|
Elf_Internal_Sym *sym;
|
| 852 |
|
|
asection *sym_sec = NULL;
|
| 853 |
|
|
const char *sym_name;
|
| 854 |
|
|
char *new_name;
|
| 855 |
|
|
|
| 856 |
|
|
/* Get cached copy of section contents if it exists. */
|
| 857 |
|
|
if (elf_section_data (section)->this_hdr.contents != NULL)
|
| 858 |
|
|
contents = elf_section_data (section)->this_hdr.contents;
|
| 859 |
|
|
else if (section->_raw_size != 0)
|
| 860 |
|
|
{
|
| 861 |
|
|
/* Go get them off disk. */
|
| 862 |
|
|
contents = (bfd_byte *)bfd_malloc (section->_raw_size);
|
| 863 |
|
|
if (contents == NULL)
|
| 864 |
|
|
goto error_return;
|
| 865 |
|
|
free_contents = contents;
|
| 866 |
|
|
|
| 867 |
|
|
if (!bfd_get_section_contents (input_bfd, section,
|
| 868 |
|
|
contents, (file_ptr) 0,
|
| 869 |
|
|
section->_raw_size))
|
| 870 |
|
|
goto error_return;
|
| 871 |
|
|
}
|
| 872 |
|
|
else
|
| 873 |
|
|
{
|
| 874 |
|
|
contents = NULL;
|
| 875 |
|
|
free_contents = NULL;
|
| 876 |
|
|
}
|
| 877 |
|
|
|
| 878 |
|
|
/* If there aren't any relocs, then there's nothing to do. */
|
| 879 |
|
|
if ((section->flags & SEC_RELOC) != 0
|
| 880 |
|
|
&& section->reloc_count != 0)
|
| 881 |
|
|
{
|
| 882 |
|
|
|
| 883 |
|
|
/* Get a copy of the native relocations. */
|
| 884 |
|
|
internal_relocs = (_bfd_elf32_link_read_relocs
|
| 885 |
|
|
(input_bfd, section, (PTR) NULL,
|
| 886 |
|
|
(Elf_Internal_Rela *) NULL,
|
| 887 |
|
|
link_info->keep_memory));
|
| 888 |
|
|
if (internal_relocs == NULL)
|
| 889 |
|
|
goto error_return;
|
| 890 |
|
|
if (! link_info->keep_memory)
|
| 891 |
|
|
free_relocs = internal_relocs;
|
| 892 |
|
|
|
| 893 |
|
|
/* Now examine each relocation. */
|
| 894 |
|
|
irel = internal_relocs;
|
| 895 |
|
|
irelend = irel + section->reloc_count;
|
| 896 |
|
|
for (; irel < irelend; irel++)
|
| 897 |
|
|
{
|
| 898 |
|
|
long r_type;
|
| 899 |
|
|
unsigned long r_index;
|
| 900 |
|
|
unsigned char code;
|
| 901 |
|
|
|
| 902 |
|
|
r_type = ELF32_R_TYPE (irel->r_info);
|
| 903 |
|
|
r_index = ELF32_R_SYM (irel->r_info);
|
| 904 |
|
|
|
| 905 |
|
|
if (r_type < 0 || r_type >= (int)R_MN10300_MAX)
|
| 906 |
|
|
goto error_return;
|
| 907 |
|
|
|
| 908 |
|
|
/* We need the name and hash table entry of the target
|
| 909 |
|
|
symbol! */
|
| 910 |
|
|
hash = NULL;
|
| 911 |
|
|
sym = NULL;
|
| 912 |
|
|
sym_sec = NULL;
|
| 913 |
|
|
|
| 914 |
|
|
if (r_index < symtab_hdr->sh_info)
|
| 915 |
|
|
{
|
| 916 |
|
|
/* A local symbol. */
|
| 917 |
|
|
Elf_Internal_Sym isym;
|
| 918 |
|
|
|
| 919 |
|
|
bfd_elf32_swap_symbol_in (input_bfd,
|
| 920 |
|
|
extsyms + r_index, &isym);
|
| 921 |
|
|
|
| 922 |
|
|
if (isym.st_shndx == SHN_UNDEF)
|
| 923 |
|
|
sym_sec = bfd_und_section_ptr;
|
| 924 |
|
|
else if (isym.st_shndx > 0
|
| 925 |
|
|
&& isym.st_shndx < SHN_LORESERVE)
|
| 926 |
|
|
sym_sec
|
| 927 |
|
|
= bfd_section_from_elf_index (input_bfd,
|
| 928 |
|
|
isym.st_shndx);
|
| 929 |
|
|
else if (isym.st_shndx == SHN_ABS)
|
| 930 |
|
|
sym_sec = bfd_abs_section_ptr;
|
| 931 |
|
|
else if (isym.st_shndx == SHN_COMMON)
|
| 932 |
|
|
sym_sec = bfd_com_section_ptr;
|
| 933 |
|
|
|
| 934 |
|
|
sym_name = bfd_elf_string_from_elf_section (input_bfd,
|
| 935 |
|
|
symtab_hdr->sh_link,
|
| 936 |
|
|
isym.st_name);
|
| 937 |
|
|
|
| 938 |
|
|
/* If it isn't a function, then we don't care
|
| 939 |
|
|
about it. */
|
| 940 |
|
|
if (r_index < symtab_hdr->sh_info
|
| 941 |
|
|
&& ELF_ST_TYPE (isym.st_info) != STT_FUNC)
|
| 942 |
|
|
continue;
|
| 943 |
|
|
|
| 944 |
|
|
/* Tack on an ID so we can uniquely identify this
|
| 945 |
|
|
local symbol in the global hash table. */
|
| 946 |
|
|
new_name = bfd_malloc (strlen (sym_name) + 10);
|
| 947 |
|
|
if (new_name == 0)
|
| 948 |
|
|
goto error_return;
|
| 949 |
|
|
|
| 950 |
|
|
sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec);
|
| 951 |
|
|
sym_name = new_name;
|
| 952 |
|
|
|
| 953 |
|
|
hash = (struct elf32_mn10300_link_hash_entry *)
|
| 954 |
|
|
elf_link_hash_lookup (&hash_table->static_hash_table->root,
|
| 955 |
|
|
sym_name, true,
|
| 956 |
|
|
true, false);
|
| 957 |
|
|
free (new_name);
|
| 958 |
|
|
}
|
| 959 |
|
|
else
|
| 960 |
|
|
{
|
| 961 |
|
|
r_index -= symtab_hdr->sh_info;
|
| 962 |
|
|
hash = (struct elf32_mn10300_link_hash_entry *)
|
| 963 |
|
|
elf_sym_hashes (input_bfd)[r_index];
|
| 964 |
|
|
}
|
| 965 |
|
|
|
| 966 |
|
|
/* If this is not a "call" instruction, then we
|
| 967 |
|
|
should convert "call" instructions to "calls"
|
| 968 |
|
|
instructions. */
|
| 969 |
|
|
code = bfd_get_8 (input_bfd,
|
| 970 |
|
|
contents + irel->r_offset - 1);
|
| 971 |
|
|
if (code != 0xdd && code != 0xcd)
|
| 972 |
|
|
hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
|
| 973 |
|
|
|
| 974 |
|
|
/* If this is a jump/call, then bump the direct_calls
|
| 975 |
|
|
counter. Else force "call" to "calls" conversions. */
|
| 976 |
|
|
if (r_type == R_MN10300_PCREL32
|
| 977 |
|
|
|| r_type == R_MN10300_PCREL16)
|
| 978 |
|
|
hash->direct_calls++;
|
| 979 |
|
|
else
|
| 980 |
|
|
hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
|
| 981 |
|
|
}
|
| 982 |
|
|
}
|
| 983 |
|
|
|
| 984 |
|
|
/* Now look at the actual contents to get the stack size,
|
| 985 |
|
|
and a list of what registers were saved in the prologue
|
| 986 |
|
|
(ie movm_args). */
|
| 987 |
|
|
if ((section->flags & SEC_CODE) != 0)
|
| 988 |
|
|
{
|
| 989 |
|
|
|
| 990 |
|
|
Elf32_External_Sym *esym, *esymend;
|
| 991 |
|
|
int idx, shndx;
|
| 992 |
|
|
|
| 993 |
|
|
shndx = _bfd_elf_section_from_bfd_section (input_bfd,
|
| 994 |
|
|
section);
|
| 995 |
|
|
|
| 996 |
|
|
|
| 997 |
|
|
/* Look at each function defined in this section and
|
| 998 |
|
|
update info for that function. */
|
| 999 |
|
|
esym = extsyms;
|
| 1000 |
|
|
esymend = esym + symtab_hdr->sh_info;
|
| 1001 |
|
|
for (; esym < esymend; esym++)
|
| 1002 |
|
|
{
|
| 1003 |
|
|
Elf_Internal_Sym isym;
|
| 1004 |
|
|
|
| 1005 |
|
|
bfd_elf32_swap_symbol_in (input_bfd, esym, &isym);
|
| 1006 |
|
|
if (isym.st_shndx == shndx
|
| 1007 |
|
|
&& ELF_ST_TYPE (isym.st_info) == STT_FUNC)
|
| 1008 |
|
|
{
|
| 1009 |
|
|
if (isym.st_shndx == SHN_UNDEF)
|
| 1010 |
|
|
sym_sec = bfd_und_section_ptr;
|
| 1011 |
|
|
else if (isym.st_shndx > 0
|
| 1012 |
|
|
&& isym.st_shndx < SHN_LORESERVE)
|
| 1013 |
|
|
sym_sec
|
| 1014 |
|
|
= bfd_section_from_elf_index (input_bfd,
|
| 1015 |
|
|
isym.st_shndx);
|
| 1016 |
|
|
else if (isym.st_shndx == SHN_ABS)
|
| 1017 |
|
|
sym_sec = bfd_abs_section_ptr;
|
| 1018 |
|
|
else if (isym.st_shndx == SHN_COMMON)
|
| 1019 |
|
|
sym_sec = bfd_com_section_ptr;
|
| 1020 |
|
|
|
| 1021 |
|
|
sym_name = bfd_elf_string_from_elf_section (input_bfd,
|
| 1022 |
|
|
symtab_hdr->sh_link,
|
| 1023 |
|
|
isym.st_name);
|
| 1024 |
|
|
|
| 1025 |
|
|
/* Tack on an ID so we can uniquely identify this
|
| 1026 |
|
|
local symbol in the global hash table. */
|
| 1027 |
|
|
new_name = bfd_malloc (strlen (sym_name) + 10);
|
| 1028 |
|
|
if (new_name == 0)
|
| 1029 |
|
|
goto error_return;
|
| 1030 |
|
|
|
| 1031 |
|
|
sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec);
|
| 1032 |
|
|
sym_name = new_name;
|
| 1033 |
|
|
|
| 1034 |
|
|
hash = (struct elf32_mn10300_link_hash_entry *)
|
| 1035 |
|
|
elf_link_hash_lookup (&hash_table->static_hash_table->root,
|
| 1036 |
|
|
sym_name, true,
|
| 1037 |
|
|
true, false);
|
| 1038 |
|
|
free (new_name);
|
| 1039 |
|
|
compute_function_info (input_bfd, hash,
|
| 1040 |
|
|
isym.st_value, contents);
|
| 1041 |
|
|
}
|
| 1042 |
|
|
}
|
| 1043 |
|
|
|
| 1044 |
|
|
esym = extsyms + symtab_hdr->sh_info;
|
| 1045 |
|
|
esymend = extsyms + (symtab_hdr->sh_size
|
| 1046 |
|
|
/ sizeof (Elf32_External_Sym));
|
| 1047 |
|
|
for (idx = 0; esym < esymend; esym++, idx++)
|
| 1048 |
|
|
{
|
| 1049 |
|
|
Elf_Internal_Sym isym;
|
| 1050 |
|
|
|
| 1051 |
|
|
bfd_elf32_swap_symbol_in (input_bfd, esym, &isym);
|
| 1052 |
|
|
hash = (struct elf32_mn10300_link_hash_entry *)
|
| 1053 |
|
|
elf_sym_hashes (input_bfd)[idx];
|
| 1054 |
|
|
if (isym.st_shndx == shndx
|
| 1055 |
|
|
&& ELF_ST_TYPE (isym.st_info) == STT_FUNC
|
| 1056 |
|
|
&& (hash)->root.root.u.def.section == section
|
| 1057 |
|
|
&& ((hash)->root.root.type == bfd_link_hash_defined
|
| 1058 |
|
|
|| (hash)->root.root.type == bfd_link_hash_defweak))
|
| 1059 |
|
|
compute_function_info (input_bfd, hash,
|
| 1060 |
|
|
(hash)->root.root.u.def.value,
|
| 1061 |
|
|
contents);
|
| 1062 |
|
|
}
|
| 1063 |
|
|
}
|
| 1064 |
|
|
|
| 1065 |
|
|
/* Cache or free any memory we allocated for the relocs. */
|
| 1066 |
|
|
if (free_relocs != NULL)
|
| 1067 |
|
|
{
|
| 1068 |
|
|
free (free_relocs);
|
| 1069 |
|
|
free_relocs = NULL;
|
| 1070 |
|
|
}
|
| 1071 |
|
|
|
| 1072 |
|
|
/* Cache or free any memory we allocated for the contents. */
|
| 1073 |
|
|
if (free_contents != NULL)
|
| 1074 |
|
|
{
|
| 1075 |
|
|
if (! link_info->keep_memory)
|
| 1076 |
|
|
free (free_contents);
|
| 1077 |
|
|
else
|
| 1078 |
|
|
{
|
| 1079 |
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
| 1080 |
|
|
elf_section_data (section)->this_hdr.contents = contents;
|
| 1081 |
|
|
}
|
| 1082 |
|
|
free_contents = NULL;
|
| 1083 |
|
|
}
|
| 1084 |
|
|
}
|
| 1085 |
|
|
|
| 1086 |
|
|
/* Cache or free any memory we allocated for the symbols. */
|
| 1087 |
|
|
if (free_extsyms != NULL)
|
| 1088 |
|
|
{
|
| 1089 |
|
|
if (! link_info->keep_memory)
|
| 1090 |
|
|
free (free_extsyms);
|
| 1091 |
|
|
else
|
| 1092 |
|
|
{
|
| 1093 |
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
| 1094 |
|
|
symtab_hdr->contents = extsyms;
|
| 1095 |
|
|
}
|
| 1096 |
|
|
free_extsyms = NULL;
|
| 1097 |
|
|
}
|
| 1098 |
|
|
}
|
| 1099 |
|
|
|
| 1100 |
|
|
/* Now iterate on each symbol in the hash table and perform
|
| 1101 |
|
|
the final initialization steps on each. */
|
| 1102 |
|
|
elf32_mn10300_link_hash_traverse (hash_table,
|
| 1103 |
|
|
elf32_mn10300_finish_hash_table_entry,
|
| 1104 |
|
|
NULL);
|
| 1105 |
|
|
elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
|
| 1106 |
|
|
elf32_mn10300_finish_hash_table_entry,
|
| 1107 |
|
|
NULL);
|
| 1108 |
|
|
|
| 1109 |
|
|
/* All entries in the hash table are fully initialized. */
|
| 1110 |
|
|
hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
|
| 1111 |
|
|
|
| 1112 |
|
|
/* Now that everything has been initialized, go through each
|
| 1113 |
|
|
code section and delete any prologue insns which will be
|
| 1114 |
|
|
redundant because their operations will be performed by
|
| 1115 |
|
|
a "call" instruction. */
|
| 1116 |
|
|
for (input_bfd = link_info->input_bfds;
|
| 1117 |
|
|
input_bfd != NULL;
|
| 1118 |
|
|
input_bfd = input_bfd->link_next)
|
| 1119 |
|
|
{
|
| 1120 |
|
|
asection *section;
|
| 1121 |
|
|
|
| 1122 |
|
|
/* We're going to need all the symbols for each bfd. */
|
| 1123 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 1124 |
|
|
|
| 1125 |
|
|
/* Get cached copy if it exists. */
|
| 1126 |
|
|
if (symtab_hdr->contents != NULL)
|
| 1127 |
|
|
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
| 1128 |
|
|
else
|
| 1129 |
|
|
{
|
| 1130 |
|
|
/* Go get them off disk. */
|
| 1131 |
|
|
extsyms = ((Elf32_External_Sym *)
|
| 1132 |
|
|
bfd_malloc (symtab_hdr->sh_size));
|
| 1133 |
|
|
if (extsyms == NULL)
|
| 1134 |
|
|
goto error_return;
|
| 1135 |
|
|
free_extsyms = extsyms;
|
| 1136 |
|
|
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
| 1137 |
|
|
|| (bfd_read (extsyms, 1, symtab_hdr->sh_size, input_bfd)
|
| 1138 |
|
|
!= symtab_hdr->sh_size))
|
| 1139 |
|
|
goto error_return;
|
| 1140 |
|
|
}
|
| 1141 |
|
|
|
| 1142 |
|
|
/* Walk over each section in this bfd. */
|
| 1143 |
|
|
for (section = input_bfd->sections;
|
| 1144 |
|
|
section != NULL;
|
| 1145 |
|
|
section = section->next)
|
| 1146 |
|
|
{
|
| 1147 |
|
|
int shndx;
|
| 1148 |
|
|
Elf32_External_Sym *esym, *esymend;
|
| 1149 |
|
|
int idx;
|
| 1150 |
|
|
|
| 1151 |
|
|
/* Skip non-code sections and empty sections. */
|
| 1152 |
|
|
if ((section->flags & SEC_CODE) == 0 || section->_raw_size == 0)
|
| 1153 |
|
|
continue;
|
| 1154 |
|
|
|
| 1155 |
|
|
if (section->reloc_count != 0)
|
| 1156 |
|
|
{
|
| 1157 |
|
|
/* Get a copy of the native relocations. */
|
| 1158 |
|
|
internal_relocs = (_bfd_elf32_link_read_relocs
|
| 1159 |
|
|
(input_bfd, section, (PTR) NULL,
|
| 1160 |
|
|
(Elf_Internal_Rela *) NULL,
|
| 1161 |
|
|
link_info->keep_memory));
|
| 1162 |
|
|
if (internal_relocs == NULL)
|
| 1163 |
|
|
goto error_return;
|
| 1164 |
|
|
if (! link_info->keep_memory)
|
| 1165 |
|
|
free_relocs = internal_relocs;
|
| 1166 |
|
|
}
|
| 1167 |
|
|
|
| 1168 |
|
|
/* Get cached copy of section contents if it exists. */
|
| 1169 |
|
|
if (elf_section_data (section)->this_hdr.contents != NULL)
|
| 1170 |
|
|
contents = elf_section_data (section)->this_hdr.contents;
|
| 1171 |
|
|
else
|
| 1172 |
|
|
{
|
| 1173 |
|
|
/* Go get them off disk. */
|
| 1174 |
|
|
contents = (bfd_byte *)bfd_malloc (section->_raw_size);
|
| 1175 |
|
|
if (contents == NULL)
|
| 1176 |
|
|
goto error_return;
|
| 1177 |
|
|
free_contents = contents;
|
| 1178 |
|
|
|
| 1179 |
|
|
if (!bfd_get_section_contents (input_bfd, section,
|
| 1180 |
|
|
contents, (file_ptr) 0,
|
| 1181 |
|
|
section->_raw_size))
|
| 1182 |
|
|
goto error_return;
|
| 1183 |
|
|
}
|
| 1184 |
|
|
|
| 1185 |
|
|
|
| 1186 |
|
|
shndx = _bfd_elf_section_from_bfd_section (input_bfd, section);
|
| 1187 |
|
|
|
| 1188 |
|
|
/* Now look for any function in this section which needs
|
| 1189 |
|
|
insns deleted from its prologue. */
|
| 1190 |
|
|
esym = extsyms;
|
| 1191 |
|
|
esymend = esym + symtab_hdr->sh_info;
|
| 1192 |
|
|
for (; esym < esymend; esym++)
|
| 1193 |
|
|
{
|
| 1194 |
|
|
Elf_Internal_Sym isym;
|
| 1195 |
|
|
struct elf32_mn10300_link_hash_entry *sym_hash;
|
| 1196 |
|
|
asection *sym_sec = NULL;
|
| 1197 |
|
|
const char *sym_name;
|
| 1198 |
|
|
char *new_name;
|
| 1199 |
|
|
|
| 1200 |
|
|
bfd_elf32_swap_symbol_in (input_bfd, esym, &isym);
|
| 1201 |
|
|
|
| 1202 |
|
|
if (isym.st_shndx != shndx)
|
| 1203 |
|
|
continue;
|
| 1204 |
|
|
|
| 1205 |
|
|
if (isym.st_shndx == SHN_UNDEF)
|
| 1206 |
|
|
sym_sec = bfd_und_section_ptr;
|
| 1207 |
|
|
else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE)
|
| 1208 |
|
|
sym_sec
|
| 1209 |
|
|
= bfd_section_from_elf_index (input_bfd, isym.st_shndx);
|
| 1210 |
|
|
else if (isym.st_shndx == SHN_ABS)
|
| 1211 |
|
|
sym_sec = bfd_abs_section_ptr;
|
| 1212 |
|
|
else if (isym.st_shndx == SHN_COMMON)
|
| 1213 |
|
|
sym_sec = bfd_com_section_ptr;
|
| 1214 |
|
|
else
|
| 1215 |
|
|
abort ();
|
| 1216 |
|
|
|
| 1217 |
|
|
sym_name = bfd_elf_string_from_elf_section (input_bfd,
|
| 1218 |
|
|
symtab_hdr->sh_link,
|
| 1219 |
|
|
isym.st_name);
|
| 1220 |
|
|
|
| 1221 |
|
|
/* Tack on an ID so we can uniquely identify this
|
| 1222 |
|
|
local symbol in the global hash table. */
|
| 1223 |
|
|
new_name = bfd_malloc (strlen (sym_name) + 10);
|
| 1224 |
|
|
if (new_name == 0)
|
| 1225 |
|
|
goto error_return;
|
| 1226 |
|
|
sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec);
|
| 1227 |
|
|
sym_name = new_name;
|
| 1228 |
|
|
|
| 1229 |
|
|
sym_hash = (struct elf32_mn10300_link_hash_entry *)
|
| 1230 |
|
|
elf_link_hash_lookup (&hash_table->static_hash_table->root,
|
| 1231 |
|
|
sym_name, false,
|
| 1232 |
|
|
false, false);
|
| 1233 |
|
|
|
| 1234 |
|
|
free (new_name);
|
| 1235 |
|
|
if (sym_hash == NULL)
|
| 1236 |
|
|
continue;
|
| 1237 |
|
|
|
| 1238 |
|
|
if (! ((sym_hash)->flags & MN10300_CONVERT_CALL_TO_CALLS)
|
| 1239 |
|
|
&& ! ((sym_hash)->flags & MN10300_DELETED_PROLOGUE_BYTES))
|
| 1240 |
|
|
{
|
| 1241 |
|
|
int bytes = 0;
|
| 1242 |
|
|
|
| 1243 |
|
|
/* Note that we've changed things. */
|
| 1244 |
|
|
elf_section_data (section)->relocs = internal_relocs;
|
| 1245 |
|
|
free_relocs = NULL;
|
| 1246 |
|
|
|
| 1247 |
|
|
elf_section_data (section)->this_hdr.contents = contents;
|
| 1248 |
|
|
free_contents = NULL;
|
| 1249 |
|
|
|
| 1250 |
|
|
symtab_hdr->contents = (bfd_byte *)extsyms;
|
| 1251 |
|
|
free_extsyms = NULL;
|
| 1252 |
|
|
|
| 1253 |
|
|
/* Count how many bytes we're going to delete. */
|
| 1254 |
|
|
if (sym_hash->movm_args)
|
| 1255 |
|
|
bytes += 2;
|
| 1256 |
|
|
|
| 1257 |
|
|
if (sym_hash->stack_size && sym_hash->stack_size <= 128)
|
| 1258 |
|
|
bytes += 3;
|
| 1259 |
|
|
else if (sym_hash->stack_size
|
| 1260 |
|
|
&& sym_hash->stack_size < 256)
|
| 1261 |
|
|
bytes += 4;
|
| 1262 |
|
|
|
| 1263 |
|
|
/* Note that we've deleted prologue bytes for this
|
| 1264 |
|
|
function. */
|
| 1265 |
|
|
sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
|
| 1266 |
|
|
|
| 1267 |
|
|
/* Actually delete the bytes. */
|
| 1268 |
|
|
if (!mn10300_elf_relax_delete_bytes (input_bfd,
|
| 1269 |
|
|
section,
|
| 1270 |
|
|
isym.st_value,
|
| 1271 |
|
|
bytes))
|
| 1272 |
|
|
goto error_return;
|
| 1273 |
|
|
|
| 1274 |
|
|
/* Something changed. Not strictly necessary, but
|
| 1275 |
|
|
may lead to more relaxing opportunities. */
|
| 1276 |
|
|
*again = true;
|
| 1277 |
|
|
}
|
| 1278 |
|
|
}
|
| 1279 |
|
|
|
| 1280 |
|
|
/* Look for any global functions in this section which
|
| 1281 |
|
|
need insns deleted from their prologues. */
|
| 1282 |
|
|
esym = extsyms + symtab_hdr->sh_info;
|
| 1283 |
|
|
esymend = extsyms + (symtab_hdr->sh_size
|
| 1284 |
|
|
/ sizeof (Elf32_External_Sym));
|
| 1285 |
|
|
for (idx = 0; esym < esymend; esym++, idx++)
|
| 1286 |
|
|
{
|
| 1287 |
|
|
Elf_Internal_Sym isym;
|
| 1288 |
|
|
struct elf32_mn10300_link_hash_entry *sym_hash;
|
| 1289 |
|
|
|
| 1290 |
|
|
bfd_elf32_swap_symbol_in (input_bfd, esym, &isym);
|
| 1291 |
|
|
sym_hash = (struct elf32_mn10300_link_hash_entry *)
|
| 1292 |
|
|
(elf_sym_hashes (input_bfd)[idx]);
|
| 1293 |
|
|
if (isym.st_shndx == shndx
|
| 1294 |
|
|
&& (sym_hash)->root.root.u.def.section == section
|
| 1295 |
|
|
&& ! ((sym_hash)->flags & MN10300_CONVERT_CALL_TO_CALLS)
|
| 1296 |
|
|
&& ! ((sym_hash)->flags & MN10300_DELETED_PROLOGUE_BYTES))
|
| 1297 |
|
|
{
|
| 1298 |
|
|
int bytes = 0;
|
| 1299 |
|
|
|
| 1300 |
|
|
/* Note that we've changed things. */
|
| 1301 |
|
|
elf_section_data (section)->relocs = internal_relocs;
|
| 1302 |
|
|
free_relocs = NULL;
|
| 1303 |
|
|
|
| 1304 |
|
|
elf_section_data (section)->this_hdr.contents = contents;
|
| 1305 |
|
|
free_contents = NULL;
|
| 1306 |
|
|
|
| 1307 |
|
|
symtab_hdr->contents = (bfd_byte *)extsyms;
|
| 1308 |
|
|
free_extsyms = NULL;
|
| 1309 |
|
|
|
| 1310 |
|
|
/* Count how many bytes we're going to delete. */
|
| 1311 |
|
|
if (sym_hash->movm_args)
|
| 1312 |
|
|
bytes += 2;
|
| 1313 |
|
|
|
| 1314 |
|
|
if (sym_hash->stack_size && sym_hash->stack_size <= 128)
|
| 1315 |
|
|
bytes += 3;
|
| 1316 |
|
|
else if (sym_hash->stack_size
|
| 1317 |
|
|
&& sym_hash->stack_size < 256)
|
| 1318 |
|
|
bytes += 4;
|
| 1319 |
|
|
|
| 1320 |
|
|
/* Note that we've deleted prologue bytes for this
|
| 1321 |
|
|
function. */
|
| 1322 |
|
|
sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
|
| 1323 |
|
|
|
| 1324 |
|
|
/* Actually delete the bytes. */
|
| 1325 |
|
|
if (!mn10300_elf_relax_delete_bytes (input_bfd,
|
| 1326 |
|
|
section,
|
| 1327 |
|
|
(sym_hash)->root.root.u.def.value,
|
| 1328 |
|
|
bytes))
|
| 1329 |
|
|
goto error_return;
|
| 1330 |
|
|
|
| 1331 |
|
|
/* Something changed. Not strictly necessary, but
|
| 1332 |
|
|
may lead to more relaxing opportunities. */
|
| 1333 |
|
|
*again = true;
|
| 1334 |
|
|
}
|
| 1335 |
|
|
}
|
| 1336 |
|
|
|
| 1337 |
|
|
/* Cache or free any memory we allocated for the relocs. */
|
| 1338 |
|
|
if (free_relocs != NULL)
|
| 1339 |
|
|
{
|
| 1340 |
|
|
free (free_relocs);
|
| 1341 |
|
|
free_relocs = NULL;
|
| 1342 |
|
|
}
|
| 1343 |
|
|
|
| 1344 |
|
|
/* Cache or free any memory we allocated for the contents. */
|
| 1345 |
|
|
if (free_contents != NULL)
|
| 1346 |
|
|
{
|
| 1347 |
|
|
if (! link_info->keep_memory)
|
| 1348 |
|
|
free (free_contents);
|
| 1349 |
|
|
else
|
| 1350 |
|
|
{
|
| 1351 |
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
| 1352 |
|
|
elf_section_data (section)->this_hdr.contents = contents;
|
| 1353 |
|
|
}
|
| 1354 |
|
|
free_contents = NULL;
|
| 1355 |
|
|
}
|
| 1356 |
|
|
}
|
| 1357 |
|
|
|
| 1358 |
|
|
/* Cache or free any memory we allocated for the symbols. */
|
| 1359 |
|
|
if (free_extsyms != NULL)
|
| 1360 |
|
|
{
|
| 1361 |
|
|
if (! link_info->keep_memory)
|
| 1362 |
|
|
free (free_extsyms);
|
| 1363 |
|
|
else
|
| 1364 |
|
|
{
|
| 1365 |
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
| 1366 |
|
|
symtab_hdr->contents = extsyms;
|
| 1367 |
|
|
}
|
| 1368 |
|
|
free_extsyms = NULL;
|
| 1369 |
|
|
}
|
| 1370 |
|
|
}
|
| 1371 |
|
|
}
|
| 1372 |
|
|
|
| 1373 |
|
|
|
| 1374 |
|
|
/* (Re)initialize for the basic instruction shortening/relaxing pass. */
|
| 1375 |
|
|
contents = NULL;
|
| 1376 |
|
|
extsyms = NULL;
|
| 1377 |
|
|
internal_relocs = NULL;
|
| 1378 |
|
|
free_relocs = NULL;
|
| 1379 |
|
|
free_contents = NULL;
|
| 1380 |
|
|
free_extsyms = NULL;
|
| 1381 |
|
|
|
| 1382 |
|
|
/* We don't have to do anything for a relocateable link, if
|
| 1383 |
|
|
this section does not have relocs, or if this is not a
|
| 1384 |
|
|
code section. */
|
| 1385 |
|
|
if (link_info->relocateable
|
| 1386 |
|
|
|| (sec->flags & SEC_RELOC) == 0
|
| 1387 |
|
|
|| sec->reloc_count == 0
|
| 1388 |
|
|
|| (sec->flags & SEC_CODE) == 0)
|
| 1389 |
|
|
return true;
|
| 1390 |
|
|
|
| 1391 |
|
|
/* If this is the first time we have been called for this section,
|
| 1392 |
|
|
initialize the cooked size. */
|
| 1393 |
|
|
if (sec->_cooked_size == 0)
|
| 1394 |
|
|
sec->_cooked_size = sec->_raw_size;
|
| 1395 |
|
|
|
| 1396 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 1397 |
|
|
|
| 1398 |
|
|
/* Get a copy of the native relocations. */
|
| 1399 |
|
|
internal_relocs = (_bfd_elf32_link_read_relocs
|
| 1400 |
|
|
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
| 1401 |
|
|
link_info->keep_memory));
|
| 1402 |
|
|
if (internal_relocs == NULL)
|
| 1403 |
|
|
goto error_return;
|
| 1404 |
|
|
if (! link_info->keep_memory)
|
| 1405 |
|
|
free_relocs = internal_relocs;
|
| 1406 |
|
|
|
| 1407 |
|
|
/* Walk through them looking for relaxing opportunities. */
|
| 1408 |
|
|
irelend = internal_relocs + sec->reloc_count;
|
| 1409 |
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
| 1410 |
|
|
{
|
| 1411 |
|
|
bfd_vma symval;
|
| 1412 |
|
|
struct elf32_mn10300_link_hash_entry *h = NULL;
|
| 1413 |
|
|
|
| 1414 |
|
|
/* If this isn't something that can be relaxed, then ignore
|
| 1415 |
|
|
this reloc. */
|
| 1416 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
|
| 1417 |
|
|
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
|
| 1418 |
|
|
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
|
| 1419 |
|
|
continue;
|
| 1420 |
|
|
|
| 1421 |
|
|
/* Get the section contents if we haven't done so already. */
|
| 1422 |
|
|
if (contents == NULL)
|
| 1423 |
|
|
{
|
| 1424 |
|
|
/* Get cached copy if it exists. */
|
| 1425 |
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
| 1426 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
| 1427 |
|
|
else
|
| 1428 |
|
|
{
|
| 1429 |
|
|
/* Go get them off disk. */
|
| 1430 |
|
|
contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
|
| 1431 |
|
|
if (contents == NULL)
|
| 1432 |
|
|
goto error_return;
|
| 1433 |
|
|
free_contents = contents;
|
| 1434 |
|
|
|
| 1435 |
|
|
if (! bfd_get_section_contents (abfd, sec, contents,
|
| 1436 |
|
|
(file_ptr) 0, sec->_raw_size))
|
| 1437 |
|
|
goto error_return;
|
| 1438 |
|
|
}
|
| 1439 |
|
|
}
|
| 1440 |
|
|
|
| 1441 |
|
|
/* Read this BFD's symbols if we haven't done so already. */
|
| 1442 |
|
|
if (extsyms == NULL)
|
| 1443 |
|
|
{
|
| 1444 |
|
|
/* Get cached copy if it exists. */
|
| 1445 |
|
|
if (symtab_hdr->contents != NULL)
|
| 1446 |
|
|
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
| 1447 |
|
|
else
|
| 1448 |
|
|
{
|
| 1449 |
|
|
/* Go get them off disk. */
|
| 1450 |
|
|
extsyms = ((Elf32_External_Sym *)
|
| 1451 |
|
|
bfd_malloc (symtab_hdr->sh_size));
|
| 1452 |
|
|
if (extsyms == NULL)
|
| 1453 |
|
|
goto error_return;
|
| 1454 |
|
|
free_extsyms = extsyms;
|
| 1455 |
|
|
if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
| 1456 |
|
|
|| (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
|
| 1457 |
|
|
!= symtab_hdr->sh_size))
|
| 1458 |
|
|
goto error_return;
|
| 1459 |
|
|
}
|
| 1460 |
|
|
}
|
| 1461 |
|
|
|
| 1462 |
|
|
/* Get the value of the symbol referred to by the reloc. */
|
| 1463 |
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
| 1464 |
|
|
{
|
| 1465 |
|
|
Elf_Internal_Sym isym;
|
| 1466 |
|
|
asection *sym_sec = NULL;
|
| 1467 |
|
|
const char *sym_name;
|
| 1468 |
|
|
char *new_name;
|
| 1469 |
|
|
|
| 1470 |
|
|
/* A local symbol. */
|
| 1471 |
|
|
bfd_elf32_swap_symbol_in (abfd,
|
| 1472 |
|
|
extsyms + ELF32_R_SYM (irel->r_info),
|
| 1473 |
|
|
&isym);
|
| 1474 |
|
|
|
| 1475 |
|
|
if (isym.st_shndx == SHN_UNDEF)
|
| 1476 |
|
|
sym_sec = bfd_und_section_ptr;
|
| 1477 |
|
|
else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE)
|
| 1478 |
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym.st_shndx);
|
| 1479 |
|
|
else if (isym.st_shndx == SHN_ABS)
|
| 1480 |
|
|
sym_sec = bfd_abs_section_ptr;
|
| 1481 |
|
|
else if (isym.st_shndx == SHN_COMMON)
|
| 1482 |
|
|
sym_sec = bfd_com_section_ptr;
|
| 1483 |
|
|
else
|
| 1484 |
|
|
abort ();
|
| 1485 |
|
|
|
| 1486 |
|
|
symval = (isym.st_value
|
| 1487 |
|
|
+ sym_sec->output_section->vma
|
| 1488 |
|
|
+ sym_sec->output_offset);
|
| 1489 |
|
|
sym_name = bfd_elf_string_from_elf_section (abfd,
|
| 1490 |
|
|
symtab_hdr->sh_link,
|
| 1491 |
|
|
isym.st_name);
|
| 1492 |
|
|
|
| 1493 |
|
|
/* Tack on an ID so we can uniquely identify this
|
| 1494 |
|
|
local symbol in the global hash table. */
|
| 1495 |
|
|
new_name = bfd_malloc (strlen (sym_name) + 10);
|
| 1496 |
|
|
if (new_name == 0)
|
| 1497 |
|
|
goto error_return;
|
| 1498 |
|
|
sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec);
|
| 1499 |
|
|
sym_name = new_name;
|
| 1500 |
|
|
|
| 1501 |
|
|
h = (struct elf32_mn10300_link_hash_entry *)
|
| 1502 |
|
|
elf_link_hash_lookup (&hash_table->static_hash_table->root,
|
| 1503 |
|
|
sym_name, false, false, false);
|
| 1504 |
|
|
free (new_name);
|
| 1505 |
|
|
}
|
| 1506 |
|
|
else
|
| 1507 |
|
|
{
|
| 1508 |
|
|
unsigned long indx;
|
| 1509 |
|
|
|
| 1510 |
|
|
/* An external symbol. */
|
| 1511 |
|
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
| 1512 |
|
|
h = (struct elf32_mn10300_link_hash_entry *)
|
| 1513 |
|
|
(elf_sym_hashes (abfd)[indx]);
|
| 1514 |
|
|
BFD_ASSERT (h != NULL);
|
| 1515 |
|
|
if (h->root.root.type != bfd_link_hash_defined
|
| 1516 |
|
|
&& h->root.root.type != bfd_link_hash_defweak)
|
| 1517 |
|
|
{
|
| 1518 |
|
|
/* This appears to be a reference to an undefined
|
| 1519 |
|
|
symbol. Just ignore it--it will be caught by the
|
| 1520 |
|
|
regular reloc processing. */
|
| 1521 |
|
|
continue;
|
| 1522 |
|
|
}
|
| 1523 |
|
|
|
| 1524 |
|
|
symval = (h->root.root.u.def.value
|
| 1525 |
|
|
+ h->root.root.u.def.section->output_section->vma
|
| 1526 |
|
|
+ h->root.root.u.def.section->output_offset);
|
| 1527 |
|
|
}
|
| 1528 |
|
|
|
| 1529 |
|
|
/* For simplicity of coding, we are going to modify the section
|
| 1530 |
|
|
contents, the section relocs, and the BFD symbol table. We
|
| 1531 |
|
|
must tell the rest of the code not to free up this
|
| 1532 |
|
|
information. It would be possible to instead create a table
|
| 1533 |
|
|
of changes which have to be made, as is done in coff-mips.c;
|
| 1534 |
|
|
that would be more work, but would require less memory when
|
| 1535 |
|
|
the linker is run. */
|
| 1536 |
|
|
|
| 1537 |
|
|
/* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
|
| 1538 |
|
|
branch/call, also deal with "call" -> "calls" conversions and
|
| 1539 |
|
|
insertion of prologue data into "call" instructions. */
|
| 1540 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32)
|
| 1541 |
|
|
{
|
| 1542 |
|
|
bfd_vma value = symval;
|
| 1543 |
|
|
|
| 1544 |
|
|
/* If we've got a "call" instruction that needs to be turned
|
| 1545 |
|
|
into a "calls" instruction, do so now. It saves a byte. */
|
| 1546 |
|
|
if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
|
| 1547 |
|
|
{
|
| 1548 |
|
|
unsigned char code;
|
| 1549 |
|
|
|
| 1550 |
|
|
/* Get the opcode. */
|
| 1551 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 1552 |
|
|
|
| 1553 |
|
|
/* Make sure we're working with a "call" instruction! */
|
| 1554 |
|
|
if (code == 0xdd)
|
| 1555 |
|
|
{
|
| 1556 |
|
|
/* Note that we've changed the relocs, section contents,
|
| 1557 |
|
|
etc. */
|
| 1558 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1559 |
|
|
free_relocs = NULL;
|
| 1560 |
|
|
|
| 1561 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1562 |
|
|
free_contents = NULL;
|
| 1563 |
|
|
|
| 1564 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 1565 |
|
|
free_extsyms = NULL;
|
| 1566 |
|
|
|
| 1567 |
|
|
/* Fix the opcode. */
|
| 1568 |
|
|
bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
|
| 1569 |
|
|
bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
|
| 1570 |
|
|
|
| 1571 |
|
|
/* Fix irel->r_offset and irel->r_addend. */
|
| 1572 |
|
|
irel->r_offset += 1;
|
| 1573 |
|
|
irel->r_addend += 1;
|
| 1574 |
|
|
|
| 1575 |
|
|
/* Delete one byte of data. */
|
| 1576 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 1577 |
|
|
irel->r_offset + 3, 1))
|
| 1578 |
|
|
goto error_return;
|
| 1579 |
|
|
|
| 1580 |
|
|
/* That will change things, so, we should relax again.
|
| 1581 |
|
|
Note that this is not required, and it may be slow. */
|
| 1582 |
|
|
*again = true;
|
| 1583 |
|
|
}
|
| 1584 |
|
|
}
|
| 1585 |
|
|
else if (h)
|
| 1586 |
|
|
{
|
| 1587 |
|
|
/* We've got a "call" instruction which needs some data
|
| 1588 |
|
|
from target function filled in. */
|
| 1589 |
|
|
unsigned char code;
|
| 1590 |
|
|
|
| 1591 |
|
|
/* Get the opcode. */
|
| 1592 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 1593 |
|
|
|
| 1594 |
|
|
/* Insert data from the target function into the "call"
|
| 1595 |
|
|
instruction if needed. */
|
| 1596 |
|
|
if (code == 0xdd)
|
| 1597 |
|
|
{
|
| 1598 |
|
|
bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
|
| 1599 |
|
|
bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
|
| 1600 |
|
|
contents + irel->r_offset + 5);
|
| 1601 |
|
|
}
|
| 1602 |
|
|
}
|
| 1603 |
|
|
|
| 1604 |
|
|
/* Deal with pc-relative gunk. */
|
| 1605 |
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
| 1606 |
|
|
value -= irel->r_offset;
|
| 1607 |
|
|
value += irel->r_addend;
|
| 1608 |
|
|
|
| 1609 |
|
|
/* See if the value will fit in 16 bits, note the high value is
|
| 1610 |
|
|
0x7fff + 2 as the target will be two bytes closer if we are
|
| 1611 |
|
|
able to relax. */
|
| 1612 |
|
|
if ((long)value < 0x8001 && (long)value > -0x8000)
|
| 1613 |
|
|
{
|
| 1614 |
|
|
unsigned char code;
|
| 1615 |
|
|
|
| 1616 |
|
|
/* Get the opcode. */
|
| 1617 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 1618 |
|
|
|
| 1619 |
|
|
if (code != 0xdc && code != 0xdd && code != 0xff)
|
| 1620 |
|
|
continue;
|
| 1621 |
|
|
|
| 1622 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1623 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1624 |
|
|
free_relocs = NULL;
|
| 1625 |
|
|
|
| 1626 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1627 |
|
|
free_contents = NULL;
|
| 1628 |
|
|
|
| 1629 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 1630 |
|
|
free_extsyms = NULL;
|
| 1631 |
|
|
|
| 1632 |
|
|
/* Fix the opcode. */
|
| 1633 |
|
|
if (code == 0xdc)
|
| 1634 |
|
|
bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
|
| 1635 |
|
|
else if (code == 0xdd)
|
| 1636 |
|
|
bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
|
| 1637 |
|
|
else if (code == 0xff)
|
| 1638 |
|
|
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
|
| 1639 |
|
|
|
| 1640 |
|
|
/* Fix the relocation's type. */
|
| 1641 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1642 |
|
|
R_MN10300_PCREL16);
|
| 1643 |
|
|
|
| 1644 |
|
|
/* Delete two bytes of data. */
|
| 1645 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 1646 |
|
|
irel->r_offset + 1, 2))
|
| 1647 |
|
|
goto error_return;
|
| 1648 |
|
|
|
| 1649 |
|
|
/* That will change things, so, we should relax again.
|
| 1650 |
|
|
Note that this is not required, and it may be slow. */
|
| 1651 |
|
|
*again = true;
|
| 1652 |
|
|
}
|
| 1653 |
|
|
}
|
| 1654 |
|
|
|
| 1655 |
|
|
/* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
|
| 1656 |
|
|
branch. */
|
| 1657 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
|
| 1658 |
|
|
{
|
| 1659 |
|
|
bfd_vma value = symval;
|
| 1660 |
|
|
|
| 1661 |
|
|
/* If we've got a "call" instruction that needs to be turned
|
| 1662 |
|
|
into a "calls" instruction, do so now. It saves a byte. */
|
| 1663 |
|
|
if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
|
| 1664 |
|
|
{
|
| 1665 |
|
|
unsigned char code;
|
| 1666 |
|
|
|
| 1667 |
|
|
/* Get the opcode. */
|
| 1668 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 1669 |
|
|
|
| 1670 |
|
|
/* Make sure we're working with a "call" instruction! */
|
| 1671 |
|
|
if (code == 0xcd)
|
| 1672 |
|
|
{
|
| 1673 |
|
|
/* Note that we've changed the relocs, section contents,
|
| 1674 |
|
|
etc. */
|
| 1675 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1676 |
|
|
free_relocs = NULL;
|
| 1677 |
|
|
|
| 1678 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1679 |
|
|
free_contents = NULL;
|
| 1680 |
|
|
|
| 1681 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 1682 |
|
|
free_extsyms = NULL;
|
| 1683 |
|
|
|
| 1684 |
|
|
/* Fix the opcode. */
|
| 1685 |
|
|
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
|
| 1686 |
|
|
bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
|
| 1687 |
|
|
|
| 1688 |
|
|
/* Fix irel->r_offset and irel->r_addend. */
|
| 1689 |
|
|
irel->r_offset += 1;
|
| 1690 |
|
|
irel->r_addend += 1;
|
| 1691 |
|
|
|
| 1692 |
|
|
/* Delete one byte of data. */
|
| 1693 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 1694 |
|
|
irel->r_offset + 1, 1))
|
| 1695 |
|
|
goto error_return;
|
| 1696 |
|
|
|
| 1697 |
|
|
/* That will change things, so, we should relax again.
|
| 1698 |
|
|
Note that this is not required, and it may be slow. */
|
| 1699 |
|
|
*again = true;
|
| 1700 |
|
|
}
|
| 1701 |
|
|
}
|
| 1702 |
|
|
else if (h)
|
| 1703 |
|
|
{
|
| 1704 |
|
|
unsigned char code;
|
| 1705 |
|
|
|
| 1706 |
|
|
/* Get the opcode. */
|
| 1707 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 1708 |
|
|
|
| 1709 |
|
|
/* Insert data from the target function into the "call"
|
| 1710 |
|
|
instruction if needed. */
|
| 1711 |
|
|
if (code == 0xcd)
|
| 1712 |
|
|
{
|
| 1713 |
|
|
bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
|
| 1714 |
|
|
bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
|
| 1715 |
|
|
contents + irel->r_offset + 3);
|
| 1716 |
|
|
}
|
| 1717 |
|
|
}
|
| 1718 |
|
|
|
| 1719 |
|
|
/* Deal with pc-relative gunk. */
|
| 1720 |
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
| 1721 |
|
|
value -= irel->r_offset;
|
| 1722 |
|
|
value += irel->r_addend;
|
| 1723 |
|
|
|
| 1724 |
|
|
/* See if the value will fit in 8 bits, note the high value is
|
| 1725 |
|
|
0x7f + 1 as the target will be one bytes closer if we are
|
| 1726 |
|
|
able to relax. */
|
| 1727 |
|
|
if ((long)value < 0x80 && (long)value > -0x80)
|
| 1728 |
|
|
{
|
| 1729 |
|
|
unsigned char code;
|
| 1730 |
|
|
|
| 1731 |
|
|
/* Get the opcode. */
|
| 1732 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 1733 |
|
|
|
| 1734 |
|
|
if (code != 0xcc)
|
| 1735 |
|
|
continue;
|
| 1736 |
|
|
|
| 1737 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1738 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1739 |
|
|
free_relocs = NULL;
|
| 1740 |
|
|
|
| 1741 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1742 |
|
|
free_contents = NULL;
|
| 1743 |
|
|
|
| 1744 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 1745 |
|
|
free_extsyms = NULL;
|
| 1746 |
|
|
|
| 1747 |
|
|
/* Fix the opcode. */
|
| 1748 |
|
|
bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
|
| 1749 |
|
|
|
| 1750 |
|
|
/* Fix the relocation's type. */
|
| 1751 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1752 |
|
|
R_MN10300_PCREL8);
|
| 1753 |
|
|
|
| 1754 |
|
|
/* Delete one byte of data. */
|
| 1755 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 1756 |
|
|
irel->r_offset + 1, 1))
|
| 1757 |
|
|
goto error_return;
|
| 1758 |
|
|
|
| 1759 |
|
|
/* That will change things, so, we should relax again.
|
| 1760 |
|
|
Note that this is not required, and it may be slow. */
|
| 1761 |
|
|
*again = true;
|
| 1762 |
|
|
}
|
| 1763 |
|
|
}
|
| 1764 |
|
|
|
| 1765 |
|
|
/* Try to eliminate an unconditional 8 bit pc-relative branch
|
| 1766 |
|
|
which immediately follows a conditional 8 bit pc-relative
|
| 1767 |
|
|
branch around the unconditional branch.
|
| 1768 |
|
|
|
| 1769 |
|
|
original: new:
|
| 1770 |
|
|
bCC lab1 bCC' lab2
|
| 1771 |
|
|
bra lab2
|
| 1772 |
|
|
lab1: lab1:
|
| 1773 |
|
|
|
| 1774 |
|
|
|
| 1775 |
|
|
This happens when the bCC can't reach lab2 at assembly time,
|
| 1776 |
|
|
but due to other relaxations it can reach at link time. */
|
| 1777 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
|
| 1778 |
|
|
{
|
| 1779 |
|
|
Elf_Internal_Rela *nrel;
|
| 1780 |
|
|
bfd_vma value = symval;
|
| 1781 |
|
|
unsigned char code;
|
| 1782 |
|
|
|
| 1783 |
|
|
/* Deal with pc-relative gunk. */
|
| 1784 |
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
| 1785 |
|
|
value -= irel->r_offset;
|
| 1786 |
|
|
value += irel->r_addend;
|
| 1787 |
|
|
|
| 1788 |
|
|
/* Do nothing if this reloc is the last byte in the section. */
|
| 1789 |
|
|
if (irel->r_offset == sec->_cooked_size)
|
| 1790 |
|
|
continue;
|
| 1791 |
|
|
|
| 1792 |
|
|
/* See if the next instruction is an unconditional pc-relative
|
| 1793 |
|
|
branch, more often than not this test will fail, so we
|
| 1794 |
|
|
test it first to speed things up. */
|
| 1795 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
|
| 1796 |
|
|
if (code != 0xca)
|
| 1797 |
|
|
continue;
|
| 1798 |
|
|
|
| 1799 |
|
|
/* Also make sure the next relocation applies to the next
|
| 1800 |
|
|
instruction and that it's a pc-relative 8 bit branch. */
|
| 1801 |
|
|
nrel = irel + 1;
|
| 1802 |
|
|
if (nrel == irelend
|
| 1803 |
|
|
|| irel->r_offset + 2 != nrel->r_offset
|
| 1804 |
|
|
|| ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
|
| 1805 |
|
|
continue;
|
| 1806 |
|
|
|
| 1807 |
|
|
/* Make sure our destination immediately follows the
|
| 1808 |
|
|
unconditional branch. */
|
| 1809 |
|
|
if (symval != (sec->output_section->vma + sec->output_offset
|
| 1810 |
|
|
+ irel->r_offset + 3))
|
| 1811 |
|
|
continue;
|
| 1812 |
|
|
|
| 1813 |
|
|
/* Now make sure we are a conditional branch. This may not
|
| 1814 |
|
|
be necessary, but why take the chance.
|
| 1815 |
|
|
|
| 1816 |
|
|
Note these checks assume that R_MN10300_PCREL8 relocs
|
| 1817 |
|
|
only occur on bCC and bCCx insns. If they occured
|
| 1818 |
|
|
elsewhere, we'd need to know the start of this insn
|
| 1819 |
|
|
for this check to be accurate. */
|
| 1820 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 1821 |
|
|
if (code != 0xc0 && code != 0xc1 && code != 0xc2
|
| 1822 |
|
|
&& code != 0xc3 && code != 0xc4 && code != 0xc5
|
| 1823 |
|
|
&& code != 0xc6 && code != 0xc7 && code != 0xc8
|
| 1824 |
|
|
&& code != 0xc9 && code != 0xe8 && code != 0xe9
|
| 1825 |
|
|
&& code != 0xea && code != 0xeb)
|
| 1826 |
|
|
continue;
|
| 1827 |
|
|
|
| 1828 |
|
|
/* We also have to be sure there is no symbol/label
|
| 1829 |
|
|
at the unconditional branch. */
|
| 1830 |
|
|
if (mn10300_elf_symbol_address_p (abfd, sec, extsyms,
|
| 1831 |
|
|
irel->r_offset + 1))
|
| 1832 |
|
|
continue;
|
| 1833 |
|
|
|
| 1834 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1835 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1836 |
|
|
free_relocs = NULL;
|
| 1837 |
|
|
|
| 1838 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1839 |
|
|
free_contents = NULL;
|
| 1840 |
|
|
|
| 1841 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 1842 |
|
|
free_extsyms = NULL;
|
| 1843 |
|
|
|
| 1844 |
|
|
/* Reverse the condition of the first branch. */
|
| 1845 |
|
|
switch (code)
|
| 1846 |
|
|
{
|
| 1847 |
|
|
case 0xc8:
|
| 1848 |
|
|
code = 0xc9;
|
| 1849 |
|
|
break;
|
| 1850 |
|
|
case 0xc9:
|
| 1851 |
|
|
code = 0xc8;
|
| 1852 |
|
|
break;
|
| 1853 |
|
|
case 0xc0:
|
| 1854 |
|
|
code = 0xc2;
|
| 1855 |
|
|
break;
|
| 1856 |
|
|
case 0xc2:
|
| 1857 |
|
|
code = 0xc0;
|
| 1858 |
|
|
break;
|
| 1859 |
|
|
case 0xc3:
|
| 1860 |
|
|
code = 0xc1;
|
| 1861 |
|
|
break;
|
| 1862 |
|
|
case 0xc1:
|
| 1863 |
|
|
code = 0xc3;
|
| 1864 |
|
|
break;
|
| 1865 |
|
|
case 0xc4:
|
| 1866 |
|
|
code = 0xc6;
|
| 1867 |
|
|
break;
|
| 1868 |
|
|
case 0xc6:
|
| 1869 |
|
|
code = 0xc4;
|
| 1870 |
|
|
break;
|
| 1871 |
|
|
case 0xc7:
|
| 1872 |
|
|
code = 0xc5;
|
| 1873 |
|
|
break;
|
| 1874 |
|
|
case 0xc5:
|
| 1875 |
|
|
code = 0xc7;
|
| 1876 |
|
|
break;
|
| 1877 |
|
|
case 0xe8:
|
| 1878 |
|
|
code = 0xe9;
|
| 1879 |
|
|
break;
|
| 1880 |
|
|
case 0x9d:
|
| 1881 |
|
|
code = 0xe8;
|
| 1882 |
|
|
break;
|
| 1883 |
|
|
case 0xea:
|
| 1884 |
|
|
code = 0xeb;
|
| 1885 |
|
|
break;
|
| 1886 |
|
|
case 0xeb:
|
| 1887 |
|
|
code = 0xea;
|
| 1888 |
|
|
break;
|
| 1889 |
|
|
}
|
| 1890 |
|
|
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
|
| 1891 |
|
|
|
| 1892 |
|
|
/* Set the reloc type and symbol for the first branch
|
| 1893 |
|
|
from the second branch. */
|
| 1894 |
|
|
irel->r_info = nrel->r_info;
|
| 1895 |
|
|
|
| 1896 |
|
|
/* Make the reloc for the second branch a null reloc. */
|
| 1897 |
|
|
nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
|
| 1898 |
|
|
R_MN10300_NONE);
|
| 1899 |
|
|
|
| 1900 |
|
|
/* Delete two bytes of data. */
|
| 1901 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 1902 |
|
|
irel->r_offset + 1, 2))
|
| 1903 |
|
|
goto error_return;
|
| 1904 |
|
|
|
| 1905 |
|
|
/* That will change things, so, we should relax again.
|
| 1906 |
|
|
Note that this is not required, and it may be slow. */
|
| 1907 |
|
|
*again = true;
|
| 1908 |
|
|
}
|
| 1909 |
|
|
|
| 1910 |
|
|
/* Try to turn a 24 immediate, displacement or absolute address
|
| 1911 |
|
|
into a 8 immediate, displacement or absolute address. */
|
| 1912 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
|
| 1913 |
|
|
{
|
| 1914 |
|
|
bfd_vma value = symval;
|
| 1915 |
|
|
value += irel->r_addend;
|
| 1916 |
|
|
|
| 1917 |
|
|
/* See if the value will fit in 8 bits. */
|
| 1918 |
|
|
if ((long)value < 0x7f && (long)value > -0x80)
|
| 1919 |
|
|
{
|
| 1920 |
|
|
unsigned char code;
|
| 1921 |
|
|
|
| 1922 |
|
|
/* AM33 insns which have 24 operands are 6 bytes long and
|
| 1923 |
|
|
will have 0xfd as the first byte. */
|
| 1924 |
|
|
|
| 1925 |
|
|
/* Get the first opcode. */
|
| 1926 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
|
| 1927 |
|
|
|
| 1928 |
|
|
if (code == 0xfd)
|
| 1929 |
|
|
{
|
| 1930 |
|
|
/* Get the second opcode. */
|
| 1931 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
|
| 1932 |
|
|
|
| 1933 |
|
|
/* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
|
| 1934 |
|
|
equivalent instructions exists. */
|
| 1935 |
|
|
if (code != 0x6b && code != 0x7b
|
| 1936 |
|
|
&& code != 0x8b && code != 0x9b
|
| 1937 |
|
|
&& ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
|
| 1938 |
|
|
|| (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
|
| 1939 |
|
|
|| (code & 0x0f) == 0x0e))
|
| 1940 |
|
|
{
|
| 1941 |
|
|
/* Not safe if the high bit is on as relaxing may
|
| 1942 |
|
|
move the value out of high mem and thus not fit
|
| 1943 |
|
|
in a signed 8bit value. This is currently over
|
| 1944 |
|
|
conservative. */
|
| 1945 |
|
|
if ((value & 0x80) == 0)
|
| 1946 |
|
|
{
|
| 1947 |
|
|
/* Note that we've changed the relocation contents,
|
| 1948 |
|
|
etc. */
|
| 1949 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1950 |
|
|
free_relocs = NULL;
|
| 1951 |
|
|
|
| 1952 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1953 |
|
|
free_contents = NULL;
|
| 1954 |
|
|
|
| 1955 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 1956 |
|
|
free_extsyms = NULL;
|
| 1957 |
|
|
|
| 1958 |
|
|
/* Fix the opcode. */
|
| 1959 |
|
|
bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
|
| 1960 |
|
|
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
|
| 1961 |
|
|
|
| 1962 |
|
|
/* Fix the relocation's type. */
|
| 1963 |
|
|
irel->r_info
|
| 1964 |
|
|
= ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1965 |
|
|
R_MN10300_8);
|
| 1966 |
|
|
|
| 1967 |
|
|
/* Delete two bytes of data. */
|
| 1968 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 1969 |
|
|
irel->r_offset + 1, 2))
|
| 1970 |
|
|
goto error_return;
|
| 1971 |
|
|
|
| 1972 |
|
|
/* That will change things, so, we should relax
|
| 1973 |
|
|
again. Note that this is not required, and it
|
| 1974 |
|
|
may be slow. */
|
| 1975 |
|
|
*again = true;
|
| 1976 |
|
|
break;
|
| 1977 |
|
|
}
|
| 1978 |
|
|
}
|
| 1979 |
|
|
|
| 1980 |
|
|
}
|
| 1981 |
|
|
}
|
| 1982 |
|
|
}
|
| 1983 |
|
|
|
| 1984 |
|
|
/* Try to turn a 32bit immediate, displacement or absolute address
|
| 1985 |
|
|
into a 16bit immediate, displacement or absolute address. */
|
| 1986 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32)
|
| 1987 |
|
|
{
|
| 1988 |
|
|
bfd_vma value = symval;
|
| 1989 |
|
|
value += irel->r_addend;
|
| 1990 |
|
|
|
| 1991 |
|
|
/* See if the value will fit in 24 bits.
|
| 1992 |
|
|
We allow any 16bit match here. We prune those we can't
|
| 1993 |
|
|
handle below. */
|
| 1994 |
|
|
if ((long)value < 0x7fffff && (long)value > -0x800000)
|
| 1995 |
|
|
{
|
| 1996 |
|
|
unsigned char code;
|
| 1997 |
|
|
|
| 1998 |
|
|
/* AM33 insns which have 32bit operands are 7 bytes long and
|
| 1999 |
|
|
will have 0xfe as the first byte. */
|
| 2000 |
|
|
|
| 2001 |
|
|
/* Get the first opcode. */
|
| 2002 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
|
| 2003 |
|
|
|
| 2004 |
|
|
if (code == 0xfe)
|
| 2005 |
|
|
{
|
| 2006 |
|
|
/* Get the second opcode. */
|
| 2007 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
|
| 2008 |
|
|
|
| 2009 |
|
|
/* All the am33 32 -> 24 relaxing possibilities. */
|
| 2010 |
|
|
/* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
|
| 2011 |
|
|
equivalent instructions exists. */
|
| 2012 |
|
|
if (code != 0x6b && code != 0x7b
|
| 2013 |
|
|
&& code != 0x8b && code != 0x9b
|
| 2014 |
|
|
&& ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
|
| 2015 |
|
|
|| (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
|
| 2016 |
|
|
|| (code & 0x0f) == 0x0e))
|
| 2017 |
|
|
{
|
| 2018 |
|
|
/* Not safe if the high bit is on as relaxing may
|
| 2019 |
|
|
move the value out of high mem and thus not fit
|
| 2020 |
|
|
in a signed 16bit value. This is currently over
|
| 2021 |
|
|
conservative. */
|
| 2022 |
|
|
if ((value & 0x8000) == 0)
|
| 2023 |
|
|
{
|
| 2024 |
|
|
/* Note that we've changed the relocation contents,
|
| 2025 |
|
|
etc. */
|
| 2026 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 2027 |
|
|
free_relocs = NULL;
|
| 2028 |
|
|
|
| 2029 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 2030 |
|
|
free_contents = NULL;
|
| 2031 |
|
|
|
| 2032 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 2033 |
|
|
free_extsyms = NULL;
|
| 2034 |
|
|
|
| 2035 |
|
|
/* Fix the opcode. */
|
| 2036 |
|
|
bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
|
| 2037 |
|
|
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
|
| 2038 |
|
|
|
| 2039 |
|
|
/* Fix the relocation's type. */
|
| 2040 |
|
|
irel->r_info
|
| 2041 |
|
|
= ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 2042 |
|
|
R_MN10300_24);
|
| 2043 |
|
|
|
| 2044 |
|
|
/* Delete one byte of data. */
|
| 2045 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 2046 |
|
|
irel->r_offset + 3, 1))
|
| 2047 |
|
|
goto error_return;
|
| 2048 |
|
|
|
| 2049 |
|
|
/* That will change things, so, we should relax
|
| 2050 |
|
|
again. Note that this is not required, and it
|
| 2051 |
|
|
may be slow. */
|
| 2052 |
|
|
*again = true;
|
| 2053 |
|
|
break;
|
| 2054 |
|
|
}
|
| 2055 |
|
|
}
|
| 2056 |
|
|
|
| 2057 |
|
|
}
|
| 2058 |
|
|
}
|
| 2059 |
|
|
|
| 2060 |
|
|
/* See if the value will fit in 16 bits.
|
| 2061 |
|
|
We allow any 16bit match here. We prune those we can't
|
| 2062 |
|
|
handle below. */
|
| 2063 |
|
|
if ((long)value < 0x7fff && (long)value > -0x8000)
|
| 2064 |
|
|
{
|
| 2065 |
|
|
unsigned char code;
|
| 2066 |
|
|
|
| 2067 |
|
|
/* Most insns which have 32bit operands are 6 bytes long;
|
| 2068 |
|
|
exceptions are pcrel insns and bit insns.
|
| 2069 |
|
|
|
| 2070 |
|
|
We handle pcrel insns above. We don't bother trying
|
| 2071 |
|
|
to handle the bit insns here.
|
| 2072 |
|
|
|
| 2073 |
|
|
The first byte of the remaining insns will be 0xfc. */
|
| 2074 |
|
|
|
| 2075 |
|
|
/* Get the first opcode. */
|
| 2076 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
|
| 2077 |
|
|
|
| 2078 |
|
|
if (code != 0xfc)
|
| 2079 |
|
|
continue;
|
| 2080 |
|
|
|
| 2081 |
|
|
/* Get the second opcode. */
|
| 2082 |
|
|
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
| 2083 |
|
|
|
| 2084 |
|
|
if ((code & 0xf0) < 0x80)
|
| 2085 |
|
|
switch (code & 0xf0)
|
| 2086 |
|
|
{
|
| 2087 |
|
|
/* mov (d32,am),dn -> mov (d32,am),dn
|
| 2088 |
|
|
mov dm,(d32,am) -> mov dn,(d32,am)
|
| 2089 |
|
|
mov (d32,am),an -> mov (d32,am),an
|
| 2090 |
|
|
mov dm,(d32,am) -> mov dn,(d32,am)
|
| 2091 |
|
|
movbu (d32,am),dn -> movbu (d32,am),dn
|
| 2092 |
|
|
movbu dm,(d32,am) -> movbu dn,(d32,am)
|
| 2093 |
|
|
movhu (d32,am),dn -> movhu (d32,am),dn
|
| 2094 |
|
|
movhu dm,(d32,am) -> movhu dn,(d32,am) */
|
| 2095 |
|
|
case 0x00:
|
| 2096 |
|
|
case 0x10:
|
| 2097 |
|
|
case 0x20:
|
| 2098 |
|
|
case 0x30:
|
| 2099 |
|
|
case 0x40:
|
| 2100 |
|
|
case 0x50:
|
| 2101 |
|
|
case 0x60:
|
| 2102 |
|
|
case 0x70:
|
| 2103 |
|
|
/* Not safe if the high bit is on as relaxing may
|
| 2104 |
|
|
move the value out of high mem and thus not fit
|
| 2105 |
|
|
in a signed 16bit value. */
|
| 2106 |
|
|
if (code == 0xcc
|
| 2107 |
|
|
&& (value & 0x8000))
|
| 2108 |
|
|
continue;
|
| 2109 |
|
|
|
| 2110 |
|
|
/* Note that we've changed the relocation contents, etc. */
|
| 2111 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 2112 |
|
|
free_relocs = NULL;
|
| 2113 |
|
|
|
| 2114 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 2115 |
|
|
free_contents = NULL;
|
| 2116 |
|
|
|
| 2117 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 2118 |
|
|
free_extsyms = NULL;
|
| 2119 |
|
|
|
| 2120 |
|
|
/* Fix the opcode. */
|
| 2121 |
|
|
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
|
| 2122 |
|
|
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
|
| 2123 |
|
|
|
| 2124 |
|
|
/* Fix the relocation's type. */
|
| 2125 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 2126 |
|
|
R_MN10300_16);
|
| 2127 |
|
|
|
| 2128 |
|
|
/* Delete two bytes of data. */
|
| 2129 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 2130 |
|
|
irel->r_offset + 2, 2))
|
| 2131 |
|
|
goto error_return;
|
| 2132 |
|
|
|
| 2133 |
|
|
/* That will change things, so, we should relax again.
|
| 2134 |
|
|
Note that this is not required, and it may be slow. */
|
| 2135 |
|
|
*again = true;
|
| 2136 |
|
|
break;
|
| 2137 |
|
|
}
|
| 2138 |
|
|
else if ((code & 0xf0) == 0x80
|
| 2139 |
|
|
|| (code & 0xf0) == 0x90)
|
| 2140 |
|
|
switch (code & 0xf3)
|
| 2141 |
|
|
{
|
| 2142 |
|
|
/* mov dn,(abs32) -> mov dn,(abs16)
|
| 2143 |
|
|
movbu dn,(abs32) -> movbu dn,(abs16)
|
| 2144 |
|
|
movhu dn,(abs32) -> movhu dn,(abs16) */
|
| 2145 |
|
|
case 0x81:
|
| 2146 |
|
|
case 0x82:
|
| 2147 |
|
|
case 0x83:
|
| 2148 |
|
|
/* Note that we've changed the relocation contents, etc. */
|
| 2149 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 2150 |
|
|
free_relocs = NULL;
|
| 2151 |
|
|
|
| 2152 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 2153 |
|
|
free_contents = NULL;
|
| 2154 |
|
|
|
| 2155 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 2156 |
|
|
free_extsyms = NULL;
|
| 2157 |
|
|
|
| 2158 |
|
|
if ((code & 0xf3) == 0x81)
|
| 2159 |
|
|
code = 0x01 + (code & 0x0c);
|
| 2160 |
|
|
else if ((code & 0xf3) == 0x82)
|
| 2161 |
|
|
code = 0x02 + (code & 0x0c);
|
| 2162 |
|
|
else if ((code & 0xf3) == 0x83)
|
| 2163 |
|
|
code = 0x03 + (code & 0x0c);
|
| 2164 |
|
|
else
|
| 2165 |
|
|
abort ();
|
| 2166 |
|
|
|
| 2167 |
|
|
/* Fix the opcode. */
|
| 2168 |
|
|
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
|
| 2169 |
|
|
|
| 2170 |
|
|
/* Fix the relocation's type. */
|
| 2171 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 2172 |
|
|
R_MN10300_16);
|
| 2173 |
|
|
|
| 2174 |
|
|
/* The opcode got shorter too, so we have to fix the
|
| 2175 |
|
|
addend and offset too! */
|
| 2176 |
|
|
irel->r_offset -= 1;
|
| 2177 |
|
|
|
| 2178 |
|
|
/* Delete three bytes of data. */
|
| 2179 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 2180 |
|
|
irel->r_offset + 1, 3))
|
| 2181 |
|
|
goto error_return;
|
| 2182 |
|
|
|
| 2183 |
|
|
/* That will change things, so, we should relax again.
|
| 2184 |
|
|
Note that this is not required, and it may be slow. */
|
| 2185 |
|
|
*again = true;
|
| 2186 |
|
|
break;
|
| 2187 |
|
|
|
| 2188 |
|
|
/* mov am,(abs32) -> mov am,(abs16)
|
| 2189 |
|
|
mov am,(d32,sp) -> mov am,(d16,sp)
|
| 2190 |
|
|
mov dm,(d32,sp) -> mov dm,(d32,sp)
|
| 2191 |
|
|
movbu dm,(d32,sp) -> movbu dm,(d32,sp)
|
| 2192 |
|
|
movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
|
| 2193 |
|
|
case 0x80:
|
| 2194 |
|
|
case 0x90:
|
| 2195 |
|
|
case 0x91:
|
| 2196 |
|
|
case 0x92:
|
| 2197 |
|
|
case 0x93:
|
| 2198 |
|
|
/* Note that we've changed the relocation contents, etc. */
|
| 2199 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 2200 |
|
|
free_relocs = NULL;
|
| 2201 |
|
|
|
| 2202 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 2203 |
|
|
free_contents = NULL;
|
| 2204 |
|
|
|
| 2205 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 2206 |
|
|
free_extsyms = NULL;
|
| 2207 |
|
|
|
| 2208 |
|
|
/* Fix the opcode. */
|
| 2209 |
|
|
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
|
| 2210 |
|
|
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
|
| 2211 |
|
|
|
| 2212 |
|
|
/* Fix the relocation's type. */
|
| 2213 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 2214 |
|
|
R_MN10300_16);
|
| 2215 |
|
|
|
| 2216 |
|
|
/* Delete two bytes of data. */
|
| 2217 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 2218 |
|
|
irel->r_offset + 2, 2))
|
| 2219 |
|
|
goto error_return;
|
| 2220 |
|
|
|
| 2221 |
|
|
/* That will change things, so, we should relax again.
|
| 2222 |
|
|
Note that this is not required, and it may be slow. */
|
| 2223 |
|
|
*again = true;
|
| 2224 |
|
|
break;
|
| 2225 |
|
|
}
|
| 2226 |
|
|
else if ((code & 0xf0) < 0xf0)
|
| 2227 |
|
|
switch (code & 0xfc)
|
| 2228 |
|
|
{
|
| 2229 |
|
|
/* mov imm32,dn -> mov imm16,dn
|
| 2230 |
|
|
mov imm32,an -> mov imm16,an
|
| 2231 |
|
|
mov (abs32),dn -> mov (abs16),dn
|
| 2232 |
|
|
movbu (abs32),dn -> movbu (abs16),dn
|
| 2233 |
|
|
movhu (abs32),dn -> movhu (abs16),dn */
|
| 2234 |
|
|
case 0xcc:
|
| 2235 |
|
|
case 0xdc:
|
| 2236 |
|
|
case 0xa4:
|
| 2237 |
|
|
case 0xa8:
|
| 2238 |
|
|
case 0xac:
|
| 2239 |
|
|
/* Not safe if the high bit is on as relaxing may
|
| 2240 |
|
|
move the value out of high mem and thus not fit
|
| 2241 |
|
|
in a signed 16bit value. */
|
| 2242 |
|
|
if (code == 0xcc
|
| 2243 |
|
|
&& (value & 0x8000))
|
| 2244 |
|
|
continue;
|
| 2245 |
|
|
|
| 2246 |
|
|
/* Note that we've changed the relocation contents, etc. */
|
| 2247 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 2248 |
|
|
free_relocs = NULL;
|
| 2249 |
|
|
|
| 2250 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 2251 |
|
|
free_contents = NULL;
|
| 2252 |
|
|
|
| 2253 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 2254 |
|
|
free_extsyms = NULL;
|
| 2255 |
|
|
|
| 2256 |
|
|
if ((code & 0xfc) == 0xcc)
|
| 2257 |
|
|
code = 0x2c + (code & 0x03);
|
| 2258 |
|
|
else if ((code & 0xfc) == 0xdc)
|
| 2259 |
|
|
code = 0x24 + (code & 0x03);
|
| 2260 |
|
|
else if ((code & 0xfc) == 0xa4)
|
| 2261 |
|
|
code = 0x30 + (code & 0x03);
|
| 2262 |
|
|
else if ((code & 0xfc) == 0xa8)
|
| 2263 |
|
|
code = 0x34 + (code & 0x03);
|
| 2264 |
|
|
else if ((code & 0xfc) == 0xac)
|
| 2265 |
|
|
code = 0x38 + (code & 0x03);
|
| 2266 |
|
|
else
|
| 2267 |
|
|
abort ();
|
| 2268 |
|
|
|
| 2269 |
|
|
/* Fix the opcode. */
|
| 2270 |
|
|
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
|
| 2271 |
|
|
|
| 2272 |
|
|
/* Fix the relocation's type. */
|
| 2273 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 2274 |
|
|
R_MN10300_16);
|
| 2275 |
|
|
|
| 2276 |
|
|
/* The opcode got shorter too, so we have to fix the
|
| 2277 |
|
|
addend and offset too! */
|
| 2278 |
|
|
irel->r_offset -= 1;
|
| 2279 |
|
|
|
| 2280 |
|
|
/* Delete three bytes of data. */
|
| 2281 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 2282 |
|
|
irel->r_offset + 1, 3))
|
| 2283 |
|
|
goto error_return;
|
| 2284 |
|
|
|
| 2285 |
|
|
/* That will change things, so, we should relax again.
|
| 2286 |
|
|
Note that this is not required, and it may be slow. */
|
| 2287 |
|
|
*again = true;
|
| 2288 |
|
|
break;
|
| 2289 |
|
|
|
| 2290 |
|
|
/* mov (abs32),an -> mov (abs16),an
|
| 2291 |
|
|
mov (d32,sp),an -> mov (d32,sp),an
|
| 2292 |
|
|
mov (d32,sp),dn -> mov (d32,sp),dn
|
| 2293 |
|
|
movbu (d32,sp),dn -> movbu (d32,sp),dn
|
| 2294 |
|
|
movhu (d32,sp),dn -> movhu (d32,sp),dn
|
| 2295 |
|
|
add imm32,dn -> add imm16,dn
|
| 2296 |
|
|
cmp imm32,dn -> cmp imm16,dn
|
| 2297 |
|
|
add imm32,an -> add imm16,an
|
| 2298 |
|
|
cmp imm32,an -> cmp imm16,an
|
| 2299 |
|
|
and imm32,dn -> and imm32,dn
|
| 2300 |
|
|
or imm32,dn -> or imm32,dn
|
| 2301 |
|
|
xor imm32,dn -> xor imm32,dn
|
| 2302 |
|
|
btst imm32,dn -> btst imm32,dn */
|
| 2303 |
|
|
|
| 2304 |
|
|
case 0xa0:
|
| 2305 |
|
|
case 0xb0:
|
| 2306 |
|
|
case 0xb1:
|
| 2307 |
|
|
case 0xb2:
|
| 2308 |
|
|
case 0xb3:
|
| 2309 |
|
|
case 0xc0:
|
| 2310 |
|
|
case 0xc8:
|
| 2311 |
|
|
|
| 2312 |
|
|
case 0xd0:
|
| 2313 |
|
|
case 0xd8:
|
| 2314 |
|
|
case 0xe0:
|
| 2315 |
|
|
case 0xe1:
|
| 2316 |
|
|
case 0xe2:
|
| 2317 |
|
|
case 0xe3:
|
| 2318 |
|
|
/* Note that we've changed the relocation contents, etc. */
|
| 2319 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 2320 |
|
|
free_relocs = NULL;
|
| 2321 |
|
|
|
| 2322 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 2323 |
|
|
free_contents = NULL;
|
| 2324 |
|
|
|
| 2325 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 2326 |
|
|
free_extsyms = NULL;
|
| 2327 |
|
|
|
| 2328 |
|
|
/* Fix the opcode. */
|
| 2329 |
|
|
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
|
| 2330 |
|
|
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
|
| 2331 |
|
|
|
| 2332 |
|
|
/* Fix the relocation's type. */
|
| 2333 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 2334 |
|
|
R_MN10300_16);
|
| 2335 |
|
|
|
| 2336 |
|
|
/* Delete two bytes of data. */
|
| 2337 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 2338 |
|
|
irel->r_offset + 2, 2))
|
| 2339 |
|
|
goto error_return;
|
| 2340 |
|
|
|
| 2341 |
|
|
/* That will change things, so, we should relax again.
|
| 2342 |
|
|
Note that this is not required, and it may be slow. */
|
| 2343 |
|
|
*again = true;
|
| 2344 |
|
|
break;
|
| 2345 |
|
|
}
|
| 2346 |
|
|
else if (code == 0xfe)
|
| 2347 |
|
|
{
|
| 2348 |
|
|
/* add imm32,sp -> add imm16,sp */
|
| 2349 |
|
|
|
| 2350 |
|
|
/* Note that we've changed the relocation contents, etc. */
|
| 2351 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 2352 |
|
|
free_relocs = NULL;
|
| 2353 |
|
|
|
| 2354 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 2355 |
|
|
free_contents = NULL;
|
| 2356 |
|
|
|
| 2357 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
| 2358 |
|
|
free_extsyms = NULL;
|
| 2359 |
|
|
|
| 2360 |
|
|
/* Fix the opcode. */
|
| 2361 |
|
|
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
|
| 2362 |
|
|
bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
|
| 2363 |
|
|
|
| 2364 |
|
|
/* Fix the relocation's type. */
|
| 2365 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 2366 |
|
|
R_MN10300_16);
|
| 2367 |
|
|
|
| 2368 |
|
|
/* Delete two bytes of data. */
|
| 2369 |
|
|
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
|
| 2370 |
|
|
irel->r_offset + 2, 2))
|
| 2371 |
|
|
goto error_return;
|
| 2372 |
|
|
|
| 2373 |
|
|
/* That will change things, so, we should relax again.
|
| 2374 |
|
|
Note that this is not required, and it may be slow. */
|
| 2375 |
|
|
*again = true;
|
| 2376 |
|
|
break;
|
| 2377 |
|
|
}
|
| 2378 |
|
|
}
|
| 2379 |
|
|
}
|
| 2380 |
|
|
}
|
| 2381 |
|
|
|
| 2382 |
|
|
if (free_relocs != NULL)
|
| 2383 |
|
|
{
|
| 2384 |
|
|
free (free_relocs);
|
| 2385 |
|
|
free_relocs = NULL;
|
| 2386 |
|
|
}
|
| 2387 |
|
|
|
| 2388 |
|
|
if (free_contents != NULL)
|
| 2389 |
|
|
{
|
| 2390 |
|
|
if (! link_info->keep_memory)
|
| 2391 |
|
|
free (free_contents);
|
| 2392 |
|
|
else
|
| 2393 |
|
|
{
|
| 2394 |
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
| 2395 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 2396 |
|
|
}
|
| 2397 |
|
|
free_contents = NULL;
|
| 2398 |
|
|
}
|
| 2399 |
|
|
|
| 2400 |
|
|
if (free_extsyms != NULL)
|
| 2401 |
|
|
{
|
| 2402 |
|
|
if (! link_info->keep_memory)
|
| 2403 |
|
|
free (free_extsyms);
|
| 2404 |
|
|
else
|
| 2405 |
|
|
{
|
| 2406 |
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
| 2407 |
|
|
symtab_hdr->contents = extsyms;
|
| 2408 |
|
|
}
|
| 2409 |
|
|
free_extsyms = NULL;
|
| 2410 |
|
|
}
|
| 2411 |
|
|
|
| 2412 |
|
|
return true;
|
| 2413 |
|
|
|
| 2414 |
|
|
error_return:
|
| 2415 |
|
|
if (free_relocs != NULL)
|
| 2416 |
|
|
free (free_relocs);
|
| 2417 |
|
|
if (free_contents != NULL)
|
| 2418 |
|
|
free (free_contents);
|
| 2419 |
|
|
if (free_extsyms != NULL)
|
| 2420 |
|
|
free (free_extsyms);
|
| 2421 |
|
|
return false;
|
| 2422 |
|
|
}
|
| 2423 |
|
|
|
| 2424 |
|
|
/* Compute the stack size and movm arguments for the function
|
| 2425 |
|
|
referred to by HASH at address ADDR in section with
|
| 2426 |
|
|
contents CONTENTS, store the information in the hash table. */
|
| 2427 |
|
|
static void
|
| 2428 |
|
|
compute_function_info (abfd, hash, addr, contents)
|
| 2429 |
|
|
bfd *abfd;
|
| 2430 |
|
|
struct elf32_mn10300_link_hash_entry *hash;
|
| 2431 |
|
|
bfd_vma addr;
|
| 2432 |
|
|
unsigned char *contents;
|
| 2433 |
|
|
{
|
| 2434 |
|
|
unsigned char byte1, byte2;
|
| 2435 |
|
|
/* We only care about a very small subset of the possible prologue
|
| 2436 |
|
|
sequences here. Basically we look for:
|
| 2437 |
|
|
|
| 2438 |
|
|
movm [d2,d3,a2,a3],sp (optional)
|
| 2439 |
|
|
add <size>,sp (optional, and only for sizes which fit in an unsigned
|
| 2440 |
|
|
8 bit number)
|
| 2441 |
|
|
|
| 2442 |
|
|
If we find anything else, we quit. */
|
| 2443 |
|
|
|
| 2444 |
|
|
/* Look for movm [regs],sp */
|
| 2445 |
|
|
byte1 = bfd_get_8 (abfd, contents + addr);
|
| 2446 |
|
|
byte2 = bfd_get_8 (abfd, contents + addr + 1);
|
| 2447 |
|
|
|
| 2448 |
|
|
if (byte1 == 0xcf)
|
| 2449 |
|
|
{
|
| 2450 |
|
|
hash->movm_args = byte2;
|
| 2451 |
|
|
addr += 2;
|
| 2452 |
|
|
byte1 = bfd_get_8 (abfd, contents + addr);
|
| 2453 |
|
|
byte2 = bfd_get_8 (abfd, contents + addr + 1);
|
| 2454 |
|
|
}
|
| 2455 |
|
|
|
| 2456 |
|
|
/* Now figure out how much stack space will be allocated by the movm
|
| 2457 |
|
|
instruction. We need this kept separate from the funtion's normal
|
| 2458 |
|
|
stack space. */
|
| 2459 |
|
|
if (hash->movm_args)
|
| 2460 |
|
|
{
|
| 2461 |
|
|
/* Space for d2. */
|
| 2462 |
|
|
if (hash->movm_args & 0x80)
|
| 2463 |
|
|
hash->movm_stack_size += 4;
|
| 2464 |
|
|
|
| 2465 |
|
|
/* Space for d3. */
|
| 2466 |
|
|
if (hash->movm_args & 0x40)
|
| 2467 |
|
|
hash->movm_stack_size += 4;
|
| 2468 |
|
|
|
| 2469 |
|
|
/* Space for a2. */
|
| 2470 |
|
|
if (hash->movm_args & 0x20)
|
| 2471 |
|
|
hash->movm_stack_size += 4;
|
| 2472 |
|
|
|
| 2473 |
|
|
/* Space for a3. */
|
| 2474 |
|
|
if (hash->movm_args & 0x10)
|
| 2475 |
|
|
hash->movm_stack_size += 4;
|
| 2476 |
|
|
|
| 2477 |
|
|
/* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
|
| 2478 |
|
|
if (hash->movm_args & 0x08)
|
| 2479 |
|
|
hash->movm_stack_size += 8 * 4;
|
| 2480 |
|
|
|
| 2481 |
|
|
if (bfd_get_mach (abfd) == bfd_mach_am33)
|
| 2482 |
|
|
{
|
| 2483 |
|
|
/* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
|
| 2484 |
|
|
if (hash->movm_args & 0x1)
|
| 2485 |
|
|
hash->movm_stack_size += 6 * 4;
|
| 2486 |
|
|
|
| 2487 |
|
|
/* exreg1 space. e4, e5, e6, e7 */
|
| 2488 |
|
|
if (hash->movm_args & 0x2)
|
| 2489 |
|
|
hash->movm_stack_size += 4 * 4;
|
| 2490 |
|
|
|
| 2491 |
|
|
/* exreg0 space. e2, e3 */
|
| 2492 |
|
|
if (hash->movm_args & 0x4)
|
| 2493 |
|
|
hash->movm_stack_size += 2 * 4;
|
| 2494 |
|
|
}
|
| 2495 |
|
|
}
|
| 2496 |
|
|
|
| 2497 |
|
|
/* Now look for the two stack adjustment variants. */
|
| 2498 |
|
|
if (byte1 == 0xf8 && byte2 == 0xfe)
|
| 2499 |
|
|
{
|
| 2500 |
|
|
int temp = bfd_get_8 (abfd, contents + addr + 2);
|
| 2501 |
|
|
temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
|
| 2502 |
|
|
|
| 2503 |
|
|
hash->stack_size = -temp;
|
| 2504 |
|
|
}
|
| 2505 |
|
|
else if (byte1 == 0xfa && byte2 == 0xfe)
|
| 2506 |
|
|
{
|
| 2507 |
|
|
int temp = bfd_get_16 (abfd, contents + addr + 2);
|
| 2508 |
|
|
temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
|
| 2509 |
|
|
temp = -temp;
|
| 2510 |
|
|
|
| 2511 |
|
|
if (temp < 255)
|
| 2512 |
|
|
hash->stack_size = temp;
|
| 2513 |
|
|
}
|
| 2514 |
|
|
|
| 2515 |
|
|
/* If the total stack to be allocated by the call instruction is more
|
| 2516 |
|
|
than 255 bytes, then we can't remove the stack adjustment by using
|
| 2517 |
|
|
"call" (we might still be able to remove the "movm" instruction. */
|
| 2518 |
|
|
if (hash->stack_size + hash->movm_stack_size > 255)
|
| 2519 |
|
|
hash->stack_size = 0;
|
| 2520 |
|
|
|
| 2521 |
|
|
return;
|
| 2522 |
|
|
}
|
| 2523 |
|
|
|
| 2524 |
|
|
/* Delete some bytes from a section while relaxing. */
|
| 2525 |
|
|
|
| 2526 |
|
|
static boolean
|
| 2527 |
|
|
mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
|
| 2528 |
|
|
bfd *abfd;
|
| 2529 |
|
|
asection *sec;
|
| 2530 |
|
|
bfd_vma addr;
|
| 2531 |
|
|
int count;
|
| 2532 |
|
|
{
|
| 2533 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 2534 |
|
|
Elf32_External_Sym *extsyms;
|
| 2535 |
|
|
int shndx, index;
|
| 2536 |
|
|
bfd_byte *contents;
|
| 2537 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
| 2538 |
|
|
Elf_Internal_Rela *irelalign;
|
| 2539 |
|
|
bfd_vma toaddr;
|
| 2540 |
|
|
Elf32_External_Sym *esym, *esymend;
|
| 2541 |
|
|
struct elf32_mn10300_link_hash_entry *sym_hash;
|
| 2542 |
|
|
|
| 2543 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 2544 |
|
|
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
| 2545 |
|
|
|
| 2546 |
|
|
shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
| 2547 |
|
|
|
| 2548 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
| 2549 |
|
|
|
| 2550 |
|
|
/* The deletion must stop at the next ALIGN reloc for an aligment
|
| 2551 |
|
|
power larger than the number of bytes we are deleting. */
|
| 2552 |
|
|
|
| 2553 |
|
|
irelalign = NULL;
|
| 2554 |
|
|
toaddr = sec->_cooked_size;
|
| 2555 |
|
|
|
| 2556 |
|
|
irel = elf_section_data (sec)->relocs;
|
| 2557 |
|
|
irelend = irel + sec->reloc_count;
|
| 2558 |
|
|
|
| 2559 |
|
|
/* Actually delete the bytes. */
|
| 2560 |
|
|
memmove (contents + addr, contents + addr + count, toaddr - addr - count);
|
| 2561 |
|
|
sec->_cooked_size -= count;
|
| 2562 |
|
|
|
| 2563 |
|
|
/* Adjust all the relocs. */
|
| 2564 |
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
| 2565 |
|
|
{
|
| 2566 |
|
|
/* Get the new reloc address. */
|
| 2567 |
|
|
if ((irel->r_offset > addr
|
| 2568 |
|
|
&& irel->r_offset < toaddr))
|
| 2569 |
|
|
irel->r_offset -= count;
|
| 2570 |
|
|
}
|
| 2571 |
|
|
|
| 2572 |
|
|
/* Adjust the local symbols defined in this section. */
|
| 2573 |
|
|
esym = extsyms;
|
| 2574 |
|
|
esymend = esym + symtab_hdr->sh_info;
|
| 2575 |
|
|
for (; esym < esymend; esym++)
|
| 2576 |
|
|
{
|
| 2577 |
|
|
Elf_Internal_Sym isym;
|
| 2578 |
|
|
|
| 2579 |
|
|
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
| 2580 |
|
|
|
| 2581 |
|
|
if (isym.st_shndx == shndx
|
| 2582 |
|
|
&& isym.st_value > addr
|
| 2583 |
|
|
&& isym.st_value < toaddr)
|
| 2584 |
|
|
{
|
| 2585 |
|
|
isym.st_value -= count;
|
| 2586 |
|
|
bfd_elf32_swap_symbol_out (abfd, &isym, esym);
|
| 2587 |
|
|
}
|
| 2588 |
|
|
}
|
| 2589 |
|
|
|
| 2590 |
|
|
/* Now adjust the global symbols defined in this section. */
|
| 2591 |
|
|
esym = extsyms + symtab_hdr->sh_info;
|
| 2592 |
|
|
esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
|
| 2593 |
|
|
for (index = 0; esym < esymend; esym++, index++)
|
| 2594 |
|
|
{
|
| 2595 |
|
|
Elf_Internal_Sym isym;
|
| 2596 |
|
|
|
| 2597 |
|
|
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
| 2598 |
|
|
sym_hash = (struct elf32_mn10300_link_hash_entry *)
|
| 2599 |
|
|
(elf_sym_hashes (abfd)[index]);
|
| 2600 |
|
|
if (isym.st_shndx == shndx
|
| 2601 |
|
|
&& ((sym_hash)->root.root.type == bfd_link_hash_defined
|
| 2602 |
|
|
|| (sym_hash)->root.root.type == bfd_link_hash_defweak)
|
| 2603 |
|
|
&& (sym_hash)->root.root.u.def.section == sec
|
| 2604 |
|
|
&& (sym_hash)->root.root.u.def.value > addr
|
| 2605 |
|
|
&& (sym_hash)->root.root.u.def.value < toaddr)
|
| 2606 |
|
|
{
|
| 2607 |
|
|
(sym_hash)->root.root.u.def.value -= count;
|
| 2608 |
|
|
}
|
| 2609 |
|
|
}
|
| 2610 |
|
|
|
| 2611 |
|
|
return true;
|
| 2612 |
|
|
}
|
| 2613 |
|
|
|
| 2614 |
|
|
/* Return true if a symbol exists at the given address, else return
|
| 2615 |
|
|
false. */
|
| 2616 |
|
|
static boolean
|
| 2617 |
|
|
mn10300_elf_symbol_address_p (abfd, sec, extsyms, addr)
|
| 2618 |
|
|
bfd *abfd;
|
| 2619 |
|
|
asection *sec;
|
| 2620 |
|
|
Elf32_External_Sym *extsyms;
|
| 2621 |
|
|
bfd_vma addr;
|
| 2622 |
|
|
{
|
| 2623 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 2624 |
|
|
int shndx;
|
| 2625 |
|
|
Elf32_External_Sym *esym, *esymend;
|
| 2626 |
|
|
struct elf32_mn10300_link_hash_entry **sym_hash, **sym_hash_end;
|
| 2627 |
|
|
|
| 2628 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 2629 |
|
|
shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
| 2630 |
|
|
|
| 2631 |
|
|
/* Examine all the symbols. */
|
| 2632 |
|
|
esym = extsyms;
|
| 2633 |
|
|
esymend = esym + symtab_hdr->sh_info;
|
| 2634 |
|
|
for (; esym < esymend; esym++)
|
| 2635 |
|
|
{
|
| 2636 |
|
|
Elf_Internal_Sym isym;
|
| 2637 |
|
|
|
| 2638 |
|
|
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
| 2639 |
|
|
|
| 2640 |
|
|
if (isym.st_shndx == shndx
|
| 2641 |
|
|
&& isym.st_value == addr)
|
| 2642 |
|
|
return true;
|
| 2643 |
|
|
}
|
| 2644 |
|
|
|
| 2645 |
|
|
sym_hash = (struct elf32_mn10300_link_hash_entry **)(elf_sym_hashes (abfd));
|
| 2646 |
|
|
sym_hash_end = (sym_hash
|
| 2647 |
|
|
+ (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
| 2648 |
|
|
- symtab_hdr->sh_info));
|
| 2649 |
|
|
for (; sym_hash < sym_hash_end; sym_hash++)
|
| 2650 |
|
|
{
|
| 2651 |
|
|
if (((*sym_hash)->root.root.type == bfd_link_hash_defined
|
| 2652 |
|
|
|| (*sym_hash)->root.root.type == bfd_link_hash_defweak)
|
| 2653 |
|
|
&& (*sym_hash)->root.root.u.def.section == sec
|
| 2654 |
|
|
&& (*sym_hash)->root.root.u.def.value == addr)
|
| 2655 |
|
|
return true;
|
| 2656 |
|
|
}
|
| 2657 |
|
|
return false;
|
| 2658 |
|
|
}
|
| 2659 |
|
|
|
| 2660 |
|
|
/* This is a version of bfd_generic_get_relocated_section_contents
|
| 2661 |
|
|
which uses mn10300_elf_relocate_section. */
|
| 2662 |
|
|
|
| 2663 |
|
|
static bfd_byte *
|
| 2664 |
|
|
mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
|
| 2665 |
|
|
data, relocateable, symbols)
|
| 2666 |
|
|
bfd *output_bfd;
|
| 2667 |
|
|
struct bfd_link_info *link_info;
|
| 2668 |
|
|
struct bfd_link_order *link_order;
|
| 2669 |
|
|
bfd_byte *data;
|
| 2670 |
|
|
boolean relocateable;
|
| 2671 |
|
|
asymbol **symbols;
|
| 2672 |
|
|
{
|
| 2673 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 2674 |
|
|
asection *input_section = link_order->u.indirect.section;
|
| 2675 |
|
|
bfd *input_bfd = input_section->owner;
|
| 2676 |
|
|
asection **sections = NULL;
|
| 2677 |
|
|
Elf_Internal_Rela *internal_relocs = NULL;
|
| 2678 |
|
|
Elf32_External_Sym *external_syms = NULL;
|
| 2679 |
|
|
Elf_Internal_Sym *internal_syms = NULL;
|
| 2680 |
|
|
|
| 2681 |
|
|
/* We only need to handle the case of relaxing, or of having a
|
| 2682 |
|
|
particular set of section contents, specially. */
|
| 2683 |
|
|
if (relocateable
|
| 2684 |
|
|
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
| 2685 |
|
|
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
| 2686 |
|
|
link_order, data,
|
| 2687 |
|
|
relocateable,
|
| 2688 |
|
|
symbols);
|
| 2689 |
|
|
|
| 2690 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 2691 |
|
|
|
| 2692 |
|
|
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
| 2693 |
|
|
input_section->_raw_size);
|
| 2694 |
|
|
|
| 2695 |
|
|
if ((input_section->flags & SEC_RELOC) != 0
|
| 2696 |
|
|
&& input_section->reloc_count > 0)
|
| 2697 |
|
|
{
|
| 2698 |
|
|
Elf_Internal_Sym *isymp;
|
| 2699 |
|
|
asection **secpp;
|
| 2700 |
|
|
Elf32_External_Sym *esym, *esymend;
|
| 2701 |
|
|
|
| 2702 |
|
|
if (symtab_hdr->contents != NULL)
|
| 2703 |
|
|
external_syms = (Elf32_External_Sym *) symtab_hdr->contents;
|
| 2704 |
|
|
else
|
| 2705 |
|
|
{
|
| 2706 |
|
|
external_syms = ((Elf32_External_Sym *)
|
| 2707 |
|
|
bfd_malloc (symtab_hdr->sh_info
|
| 2708 |
|
|
* sizeof (Elf32_External_Sym)));
|
| 2709 |
|
|
if (external_syms == NULL && symtab_hdr->sh_info > 0)
|
| 2710 |
|
|
goto error_return;
|
| 2711 |
|
|
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
| 2712 |
|
|
|| (bfd_read (external_syms, sizeof (Elf32_External_Sym),
|
| 2713 |
|
|
symtab_hdr->sh_info, input_bfd)
|
| 2714 |
|
|
!= (symtab_hdr->sh_info * sizeof (Elf32_External_Sym))))
|
| 2715 |
|
|
goto error_return;
|
| 2716 |
|
|
}
|
| 2717 |
|
|
|
| 2718 |
|
|
internal_relocs = (_bfd_elf32_link_read_relocs
|
| 2719 |
|
|
(input_bfd, input_section, (PTR) NULL,
|
| 2720 |
|
|
(Elf_Internal_Rela *) NULL, false));
|
| 2721 |
|
|
if (internal_relocs == NULL)
|
| 2722 |
|
|
goto error_return;
|
| 2723 |
|
|
|
| 2724 |
|
|
internal_syms = ((Elf_Internal_Sym *)
|
| 2725 |
|
|
bfd_malloc (symtab_hdr->sh_info
|
| 2726 |
|
|
* sizeof (Elf_Internal_Sym)));
|
| 2727 |
|
|
if (internal_syms == NULL && symtab_hdr->sh_info > 0)
|
| 2728 |
|
|
goto error_return;
|
| 2729 |
|
|
|
| 2730 |
|
|
sections = (asection **) bfd_malloc (symtab_hdr->sh_info
|
| 2731 |
|
|
* sizeof (asection *));
|
| 2732 |
|
|
if (sections == NULL && symtab_hdr->sh_info > 0)
|
| 2733 |
|
|
goto error_return;
|
| 2734 |
|
|
|
| 2735 |
|
|
isymp = internal_syms;
|
| 2736 |
|
|
secpp = sections;
|
| 2737 |
|
|
esym = external_syms;
|
| 2738 |
|
|
esymend = esym + symtab_hdr->sh_info;
|
| 2739 |
|
|
for (; esym < esymend; ++esym, ++isymp, ++secpp)
|
| 2740 |
|
|
{
|
| 2741 |
|
|
asection *isec;
|
| 2742 |
|
|
|
| 2743 |
|
|
bfd_elf32_swap_symbol_in (input_bfd, esym, isymp);
|
| 2744 |
|
|
|
| 2745 |
|
|
if (isymp->st_shndx == SHN_UNDEF)
|
| 2746 |
|
|
isec = bfd_und_section_ptr;
|
| 2747 |
|
|
else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE)
|
| 2748 |
|
|
isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx);
|
| 2749 |
|
|
else if (isymp->st_shndx == SHN_ABS)
|
| 2750 |
|
|
isec = bfd_abs_section_ptr;
|
| 2751 |
|
|
else if (isymp->st_shndx == SHN_COMMON)
|
| 2752 |
|
|
isec = bfd_com_section_ptr;
|
| 2753 |
|
|
else
|
| 2754 |
|
|
{
|
| 2755 |
|
|
/* Who knows? */
|
| 2756 |
|
|
isec = NULL;
|
| 2757 |
|
|
}
|
| 2758 |
|
|
|
| 2759 |
|
|
*secpp = isec;
|
| 2760 |
|
|
}
|
| 2761 |
|
|
|
| 2762 |
|
|
if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
|
| 2763 |
|
|
input_section, data, internal_relocs,
|
| 2764 |
|
|
internal_syms, sections))
|
| 2765 |
|
|
goto error_return;
|
| 2766 |
|
|
|
| 2767 |
|
|
if (sections != NULL)
|
| 2768 |
|
|
free (sections);
|
| 2769 |
|
|
sections = NULL;
|
| 2770 |
|
|
if (internal_syms != NULL)
|
| 2771 |
|
|
free (internal_syms);
|
| 2772 |
|
|
internal_syms = NULL;
|
| 2773 |
|
|
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
| 2774 |
|
|
free (external_syms);
|
| 2775 |
|
|
external_syms = NULL;
|
| 2776 |
|
|
if (internal_relocs != elf_section_data (input_section)->relocs)
|
| 2777 |
|
|
free (internal_relocs);
|
| 2778 |
|
|
internal_relocs = NULL;
|
| 2779 |
|
|
}
|
| 2780 |
|
|
|
| 2781 |
|
|
return data;
|
| 2782 |
|
|
|
| 2783 |
|
|
error_return:
|
| 2784 |
|
|
if (internal_relocs != NULL
|
| 2785 |
|
|
&& internal_relocs != elf_section_data (input_section)->relocs)
|
| 2786 |
|
|
free (internal_relocs);
|
| 2787 |
|
|
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
| 2788 |
|
|
free (external_syms);
|
| 2789 |
|
|
if (internal_syms != NULL)
|
| 2790 |
|
|
free (internal_syms);
|
| 2791 |
|
|
if (sections != NULL)
|
| 2792 |
|
|
free (sections);
|
| 2793 |
|
|
return NULL;
|
| 2794 |
|
|
}
|
| 2795 |
|
|
|
| 2796 |
|
|
/* Assorted hash table functions. */
|
| 2797 |
|
|
|
| 2798 |
|
|
/* Initialize an entry in the link hash table. */
|
| 2799 |
|
|
|
| 2800 |
|
|
/* Create an entry in an MN10300 ELF linker hash table. */
|
| 2801 |
|
|
|
| 2802 |
|
|
static struct bfd_hash_entry *
|
| 2803 |
|
|
elf32_mn10300_link_hash_newfunc (entry, table, string)
|
| 2804 |
|
|
struct bfd_hash_entry *entry;
|
| 2805 |
|
|
struct bfd_hash_table *table;
|
| 2806 |
|
|
const char *string;
|
| 2807 |
|
|
{
|
| 2808 |
|
|
struct elf32_mn10300_link_hash_entry *ret =
|
| 2809 |
|
|
(struct elf32_mn10300_link_hash_entry *) entry;
|
| 2810 |
|
|
|
| 2811 |
|
|
/* Allocate the structure if it has not already been allocated by a
|
| 2812 |
|
|
subclass. */
|
| 2813 |
|
|
if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
|
| 2814 |
|
|
ret = ((struct elf32_mn10300_link_hash_entry *)
|
| 2815 |
|
|
bfd_hash_allocate (table,
|
| 2816 |
|
|
sizeof (struct elf32_mn10300_link_hash_entry)));
|
| 2817 |
|
|
if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
|
| 2818 |
|
|
return (struct bfd_hash_entry *) ret;
|
| 2819 |
|
|
|
| 2820 |
|
|
/* Call the allocation method of the superclass. */
|
| 2821 |
|
|
ret = ((struct elf32_mn10300_link_hash_entry *)
|
| 2822 |
|
|
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
| 2823 |
|
|
table, string));
|
| 2824 |
|
|
if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
|
| 2825 |
|
|
{
|
| 2826 |
|
|
ret->direct_calls = 0;
|
| 2827 |
|
|
ret->stack_size = 0;
|
| 2828 |
|
|
ret->movm_stack_size = 0;
|
| 2829 |
|
|
ret->flags = 0;
|
| 2830 |
|
|
ret->movm_args = 0;
|
| 2831 |
|
|
}
|
| 2832 |
|
|
|
| 2833 |
|
|
return (struct bfd_hash_entry *) ret;
|
| 2834 |
|
|
}
|
| 2835 |
|
|
|
| 2836 |
|
|
/* Create an mn10300 ELF linker hash table. */
|
| 2837 |
|
|
|
| 2838 |
|
|
static struct bfd_link_hash_table *
|
| 2839 |
|
|
elf32_mn10300_link_hash_table_create (abfd)
|
| 2840 |
|
|
bfd *abfd;
|
| 2841 |
|
|
{
|
| 2842 |
|
|
struct elf32_mn10300_link_hash_table *ret;
|
| 2843 |
|
|
|
| 2844 |
|
|
ret = ((struct elf32_mn10300_link_hash_table *)
|
| 2845 |
|
|
bfd_alloc (abfd, sizeof (struct elf32_mn10300_link_hash_table)));
|
| 2846 |
|
|
if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
|
| 2847 |
|
|
return NULL;
|
| 2848 |
|
|
|
| 2849 |
|
|
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
|
| 2850 |
|
|
elf32_mn10300_link_hash_newfunc))
|
| 2851 |
|
|
{
|
| 2852 |
|
|
bfd_release (abfd, ret);
|
| 2853 |
|
|
return NULL;
|
| 2854 |
|
|
}
|
| 2855 |
|
|
|
| 2856 |
|
|
ret->flags = 0;
|
| 2857 |
|
|
ret->static_hash_table
|
| 2858 |
|
|
= ((struct elf32_mn10300_link_hash_table *)
|
| 2859 |
|
|
bfd_alloc (abfd, sizeof (struct elf_link_hash_table)));
|
| 2860 |
|
|
if (ret->static_hash_table == NULL)
|
| 2861 |
|
|
{
|
| 2862 |
|
|
bfd_release (abfd, ret);
|
| 2863 |
|
|
return NULL;
|
| 2864 |
|
|
}
|
| 2865 |
|
|
|
| 2866 |
|
|
if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
|
| 2867 |
|
|
elf32_mn10300_link_hash_newfunc))
|
| 2868 |
|
|
{
|
| 2869 |
|
|
bfd_release (abfd, ret->static_hash_table);
|
| 2870 |
|
|
bfd_release (abfd, ret);
|
| 2871 |
|
|
return NULL;
|
| 2872 |
|
|
}
|
| 2873 |
|
|
return &ret->root.root;
|
| 2874 |
|
|
}
|
| 2875 |
|
|
|
| 2876 |
|
|
static int
|
| 2877 |
|
|
elf_mn10300_mach (flags)
|
| 2878 |
|
|
flagword flags;
|
| 2879 |
|
|
{
|
| 2880 |
|
|
switch (flags & EF_MN10300_MACH)
|
| 2881 |
|
|
{
|
| 2882 |
|
|
case E_MN10300_MACH_MN10300:
|
| 2883 |
|
|
default:
|
| 2884 |
|
|
return bfd_mach_mn10300;
|
| 2885 |
|
|
|
| 2886 |
|
|
case E_MN10300_MACH_AM33:
|
| 2887 |
|
|
return bfd_mach_am33;
|
| 2888 |
|
|
}
|
| 2889 |
|
|
}
|
| 2890 |
|
|
|
| 2891 |
|
|
/* The final processing done just before writing out a MN10300 ELF object
|
| 2892 |
|
|
file. This gets the MN10300 architecture right based on the machine
|
| 2893 |
|
|
number. */
|
| 2894 |
|
|
|
| 2895 |
|
|
/*ARGSUSED*/
|
| 2896 |
|
|
void
|
| 2897 |
|
|
_bfd_mn10300_elf_final_write_processing (abfd, linker)
|
| 2898 |
|
|
bfd *abfd;
|
| 2899 |
|
|
boolean linker ATTRIBUTE_UNUSED;
|
| 2900 |
|
|
{
|
| 2901 |
|
|
unsigned long val;
|
| 2902 |
|
|
|
| 2903 |
|
|
switch (bfd_get_mach (abfd))
|
| 2904 |
|
|
{
|
| 2905 |
|
|
default:
|
| 2906 |
|
|
case bfd_mach_mn10300:
|
| 2907 |
|
|
val = E_MN10300_MACH_MN10300;
|
| 2908 |
|
|
break;
|
| 2909 |
|
|
|
| 2910 |
|
|
case bfd_mach_am33:
|
| 2911 |
|
|
val = E_MN10300_MACH_AM33;
|
| 2912 |
|
|
break;
|
| 2913 |
|
|
}
|
| 2914 |
|
|
|
| 2915 |
|
|
elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
|
| 2916 |
|
|
elf_elfheader (abfd)->e_flags |= val;
|
| 2917 |
|
|
}
|
| 2918 |
|
|
|
| 2919 |
|
|
boolean
|
| 2920 |
|
|
_bfd_mn10300_elf_object_p (abfd)
|
| 2921 |
|
|
bfd *abfd;
|
| 2922 |
|
|
{
|
| 2923 |
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
|
| 2924 |
|
|
elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
|
| 2925 |
|
|
return true;
|
| 2926 |
|
|
}
|
| 2927 |
|
|
|
| 2928 |
|
|
/* Merge backend specific data from an object file to the output
|
| 2929 |
|
|
object file when linking. */
|
| 2930 |
|
|
|
| 2931 |
|
|
boolean
|
| 2932 |
|
|
_bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
|
| 2933 |
|
|
bfd *ibfd;
|
| 2934 |
|
|
bfd *obfd;
|
| 2935 |
|
|
{
|
| 2936 |
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
| 2937 |
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
| 2938 |
|
|
return true;
|
| 2939 |
|
|
|
| 2940 |
|
|
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
| 2941 |
|
|
&& bfd_get_mach (obfd) < bfd_get_mach (ibfd))
|
| 2942 |
|
|
{
|
| 2943 |
|
|
if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
|
| 2944 |
|
|
bfd_get_mach (ibfd)))
|
| 2945 |
|
|
return false;
|
| 2946 |
|
|
}
|
| 2947 |
|
|
|
| 2948 |
|
|
return true;
|
| 2949 |
|
|
}
|
| 2950 |
|
|
|
| 2951 |
|
|
|
| 2952 |
|
|
#define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
|
| 2953 |
|
|
#define TARGET_LITTLE_NAME "elf32-mn10300"
|
| 2954 |
|
|
#define ELF_ARCH bfd_arch_mn10300
|
| 2955 |
|
|
#define ELF_MACHINE_CODE EM_CYGNUS_MN10300
|
| 2956 |
|
|
#define ELF_MAXPAGESIZE 0x1000
|
| 2957 |
|
|
|
| 2958 |
|
|
#define elf_info_to_howto mn10300_info_to_howto
|
| 2959 |
|
|
#define elf_info_to_howto_rel 0
|
| 2960 |
|
|
#define elf_backend_can_gc_sections 1
|
| 2961 |
|
|
#define elf_backend_check_relocs mn10300_elf_check_relocs
|
| 2962 |
|
|
#define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
|
| 2963 |
|
|
#define elf_backend_relocate_section mn10300_elf_relocate_section
|
| 2964 |
|
|
#define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
|
| 2965 |
|
|
#define bfd_elf32_bfd_get_relocated_section_contents \
|
| 2966 |
|
|
mn10300_elf_get_relocated_section_contents
|
| 2967 |
|
|
#define bfd_elf32_bfd_link_hash_table_create \
|
| 2968 |
|
|
elf32_mn10300_link_hash_table_create
|
| 2969 |
|
|
|
| 2970 |
|
|
#define elf_symbol_leading_char '_'
|
| 2971 |
|
|
|
| 2972 |
|
|
/* So we can set bits in e_flags. */
|
| 2973 |
|
|
#define elf_backend_final_write_processing \
|
| 2974 |
|
|
_bfd_mn10300_elf_final_write_processing
|
| 2975 |
|
|
#define elf_backend_object_p _bfd_mn10300_elf_object_p
|
| 2976 |
|
|
|
| 2977 |
|
|
#define bfd_elf32_bfd_merge_private_bfd_data \
|
| 2978 |
|
|
_bfd_mn10300_elf_merge_private_bfd_data
|
| 2979 |
|
|
|
| 2980 |
|
|
|
| 2981 |
|
|
#include "elf32-target.h"
|
