522 lines
16 KiB
C
522 lines
16 KiB
C
/* FR30-specific support for 32-bit ELF.
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Copyright (C) 1998 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/fr30.h"
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/* Forward declarations. */
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static bfd_reloc_status_type fr30_elf_i20_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static reloc_howto_type * fr30_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void fr30_info_to_howto_rela
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
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static boolean fr30_elf_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static reloc_howto_type fr30_elf_howto_table [] =
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{
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/* This reloc does nothing. */
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HOWTO (R_FR30_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_FR30_NONE", /* 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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/* An 8 bit absolute relocation. */
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HOWTO (R_FR30_8, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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4, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_FR30_8", /* name */
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true, /* partial_inplace */
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0x0ff0, /* src_mask */
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0x0ff0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 20 bit absolute relocation. */
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HOWTO (R_FR30_20, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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20, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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fr30_elf_i20_reloc, /* special_function */
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"R_FR30_20", /* name */
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true, /* partial_inplace */
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0x00f0ffff, /* src_mask */
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0x00f0ffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit absolute relocation. */
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HOWTO (R_FR30_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_FR30_32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 6 bit absolute relocation. */
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HOWTO (R_FR30_6_IN_4, /* type */
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2, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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6, /* bitsize */
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false, /* pc_relative */
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4, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_FR30_6_IN_4", /* name */
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true, /* partial_inplace */
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0x00f0, /* src_mask */
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0x00f0, /* dst_mask */
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false), /* pcrel_offset */
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/* An 8 bit absolute relocation. */
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HOWTO (R_FR30_8_IN_8, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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4, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc,/* special_function */
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"R_FR30_8_IN_8", /* name */
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true, /* partial_inplace */
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0x0ff0, /* src_mask */
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0x0ff0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 9 bit absolute relocation. */
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HOWTO (R_FR30_9_IN_8, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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9, /* bitsize */
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false, /* pc_relative */
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4, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc,/* special_function */
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"R_FR30_9_IN_8", /* name */
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true, /* partial_inplace */
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0x0ff0, /* src_mask */
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0x0ff0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 10 bit absolute relocation. */
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HOWTO (R_FR30_10_IN_8, /* type */
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2, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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false, /* pc_relative */
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4, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc,/* special_function */
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"R_FR30_10_IN_8", /* name */
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true, /* partial_inplace */
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0x0ff0, /* src_mask */
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0x0ff0, /* dst_mask */
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false), /* pcrel_offset */
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/* A PC relative 9 bit relocation, right shifted by 1. */
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HOWTO (R_FR30_9_PCREL, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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9, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_FR30_9_PCREL", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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true), /* pcrel_offset */
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/* A PC relative 12 bit relocation, right shifted by 1. */
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HOWTO (R_FR30_12_PCREL, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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12, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_FR30_12_PCREL", /* name */
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false, /* partial_inplace */
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0x07ff, /* src_mask */
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0x07ff, /* dst_mask */
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true), /* pcrel_offset */
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};
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/* Utility to actually perform an R_FR30_20 reloc. */
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static bfd_reloc_status_type
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fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data,
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input_section, output_bfd, error_message)
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bfd * abfd;
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arelent * reloc_entry;
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asymbol * symbol;
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PTR data;
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asection * input_section;
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bfd * output_bfd;
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char ** error_message;
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{
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bfd_vma relocation;
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unsigned long x;
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/* This part is from bfd_elf_generic_reloc. */
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if (output_bfd != (bfd *) NULL
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&& (symbol->flags & BSF_SECTION_SYM) == 0
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&& (! reloc_entry->howto->partial_inplace
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|| reloc_entry->addend == 0))
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{
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reloc_entry->address += input_section->output_offset;
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return bfd_reloc_ok;
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}
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if (output_bfd != NULL)
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/* FIXME: See bfd_perform_relocation. Is this right? */
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return bfd_reloc_continue;
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relocation =
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symbol->value
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+ symbol->section->output_section->vma
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+ symbol->section->output_offset
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+ reloc_entry->addend;
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if (relocation > ((1U << 20) - 1))
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return bfd_reloc_overflow;
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x = bfd_get_32 (abfd, data + reloc_entry->address);
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x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
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bfd_put_32 (abfd, x, data + reloc_entry->address);
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return bfd_reloc_ok;
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}
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/* Map BFD reloc types to FR30 ELF reloc types. */
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struct fr30_reloc_map
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{
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unsigned int bfd_reloc_val;
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unsigned int fr30_reloc_val;
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};
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static const struct fr30_reloc_map fr30_reloc_map [] =
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{
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{ BFD_RELOC_NONE, R_FR30_NONE },
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{ BFD_RELOC_8, R_FR30_8 },
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{ BFD_RELOC_FR30_20, R_FR30_20 },
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{ BFD_RELOC_32, R_FR30_32 },
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{ BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
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{ BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
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{ BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
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{ BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
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{ BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
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{ BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
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};
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static reloc_howto_type *
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fr30_reloc_type_lookup (abfd, code)
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bfd * abfd;
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bfd_reloc_code_real_type code;
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{
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unsigned int i;
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for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]);
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--i;)
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if (fr30_reloc_map [i].bfd_reloc_val == code)
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return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
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return NULL;
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}
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/* Set the howto pointer for an FR30 ELF reloc. */
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static void
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fr30_info_to_howto_rela (abfd, cache_ptr, dst)
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bfd * abfd;
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arelent * cache_ptr;
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Elf32_Internal_Rela * dst;
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{
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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BFD_ASSERT (r_type < (unsigned int) R_FR30_max);
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cache_ptr->howto = & fr30_elf_howto_table [r_type];
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}
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/* Relocate an FR30 ELF section.
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There is some attempt to make this function usable for many architectures,
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both USE_REL and USE_RELA ['twould be nice if such a critter existed],
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if only to serve as a learning tool.
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The RELOCATE_SECTION function is called by the new ELF backend linker
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to handle the relocations for a section.
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The relocs are always passed as Rela structures; if the section
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actually uses Rel structures, the r_addend field will always be
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zero.
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This function is responsible for adjusting the section contents as
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necessary, and (if using Rela relocs and generating a relocateable
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output file) adjusting the reloc addend as necessary.
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This function does not have to worry about setting the reloc
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address or the reloc symbol index.
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LOCAL_SYMS is a pointer to the swapped in local symbols.
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LOCAL_SECTIONS is an array giving the section in the input file
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corresponding to the st_shndx field of each local symbol.
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The global hash table entry for the global symbols can be found
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via elf_sym_hashes (input_bfd).
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When generating relocateable output, this function must handle
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STB_LOCAL/STT_SECTION symbols specially. The output symbol is
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going to be the section symbol corresponding to the output
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section, which means that the addend must be adjusted
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accordingly. */
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static boolean
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fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section,
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contents, relocs, local_syms, local_sections)
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bfd * output_bfd;
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struct bfd_link_info * info;
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bfd * input_bfd;
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asection * input_section;
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bfd_byte * contents;
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Elf_Internal_Rela * relocs;
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Elf_Internal_Sym * local_syms;
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asection ** local_sections;
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{
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Elf_Internal_Shdr * symtab_hdr;
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struct elf_link_hash_entry ** sym_hashes;
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Elf_Internal_Rela * rel;
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Elf_Internal_Rela * relend;
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symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
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sym_hashes = elf_sym_hashes (input_bfd);
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relend = relocs + input_section->reloc_count;
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for (rel = relocs; rel < relend; rel ++)
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{
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reloc_howto_type * howto;
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unsigned long r_symndx;
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Elf_Internal_Sym * sym;
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asection * sec;
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struct elf_link_hash_entry * h;
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bfd_vma relocation;
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bfd_reloc_status_type r;
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const char * name;
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r_symndx = ELF32_R_SYM (rel->r_info);
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if (info->relocateable)
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{
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/* This is a relocateable link. We don't have to change
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anything, unless the reloc is against a section symbol,
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in which case we have to adjust according to where the
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section symbol winds up in the output section. */
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if (r_symndx < symtab_hdr->sh_info)
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{
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sym = local_syms + r_symndx;
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if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
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{
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sec = local_sections [r_symndx];
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rel->r_addend += sec->output_offset + sym->st_value;
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}
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}
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continue;
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}
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/* This is a final link. */
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howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info);
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h = NULL;
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sym = NULL;
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sec = NULL;
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if (r_symndx < symtab_hdr->sh_info)
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{
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sym = local_syms + r_symndx;
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sec = local_sections [r_symndx];
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relocation = (sec->output_section->vma
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+ sec->output_offset
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+ sym->st_value);
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name = bfd_elf_string_from_elf_section
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(input_bfd, symtab_hdr->sh_link, sym->st_name);
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name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
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#if 0
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fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
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sec->name, name, sym->st_name,
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sec->output_section->vma, sec->output_offset,
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sym->st_value, rel->r_addend);
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#endif
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}
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else
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{
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h = sym_hashes [r_symndx - symtab_hdr->sh_info];
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while (h->root.type == bfd_link_hash_indirect
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|| h->root.type == bfd_link_hash_warning)
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h = (struct elf_link_hash_entry *) h->root.u.i.link;
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name = h->root.root.string;
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if (h->root.type == bfd_link_hash_defined
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|| h->root.type == bfd_link_hash_defweak)
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{
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sec = h->root.u.def.section;
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relocation = (h->root.u.def.value
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+ sec->output_section->vma
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+ sec->output_offset);
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#if 0
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fprintf (stderr,
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"defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
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sec->name, name, h->root.u.def.value,
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sec->output_section->vma, sec->output_offset, relocation);
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#endif
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}
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else if (h->root.type == bfd_link_hash_undefweak)
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{
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#if 0
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fprintf (stderr, "undefined: sec: %s, name: %s\n",
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sec->name, name);
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#endif
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relocation = 0;
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}
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else
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{
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if (! ((*info->callbacks->undefined_symbol)
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(info, h->root.root.string, input_bfd,
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input_section, rel->r_offset)))
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return false;
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#if 0
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fprintf (stderr, "unknown: name: %s\n", name);
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#endif
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relocation = 0;
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}
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}
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r = _bfd_final_link_relocate (howto, input_bfd, input_section,
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contents, rel->r_offset,
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relocation, rel->r_addend);
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if (r != bfd_reloc_ok)
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{
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const char * msg = (const char *)0;
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switch (r)
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{
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case bfd_reloc_overflow:
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if (! ((*info->callbacks->reloc_overflow)
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(info, name, howto->name, (bfd_vma) 0,
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input_bfd, input_section, rel->r_offset)))
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return false;
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break;
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case bfd_reloc_undefined:
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if (! ((*info->callbacks->undefined_symbol)
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(info, name, input_bfd, input_section,
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rel->r_offset)))
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return false;
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break;
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case bfd_reloc_outofrange:
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msg = _("internal error: out of range error");
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goto common_error;
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case bfd_reloc_notsupported:
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msg = _("internal error: unsupported relocation error");
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goto common_error;
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case bfd_reloc_dangerous:
|
||
msg = _("internal error: dangerous relocation");
|
||
goto common_error;
|
||
|
||
case bfd_reloc_other:
|
||
msg = _("could not locate special linker symbol __gp");
|
||
goto common_error;
|
||
|
||
case bfd_reloc_continue:
|
||
msg = _("could not locate special linker symbol __ep");
|
||
goto common_error;
|
||
|
||
case (bfd_reloc_dangerous + 1):
|
||
msg = _("could not locate special linker symbol __ctbp");
|
||
goto common_error;
|
||
|
||
default:
|
||
msg = _("internal error: unknown error");
|
||
/* fall through */
|
||
|
||
common_error:
|
||
if (!((*info->callbacks->warning)
|
||
(info, msg, name, input_bfd, input_section,
|
||
rel->r_offset)))
|
||
return false;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
#define ELF_ARCH bfd_arch_fr30
|
||
#define ELF_MACHINE_CODE EM_CYGNUS_FR30
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_fr30_vec
|
||
#define TARGET_BIG_NAME "elf32-fr30"
|
||
|
||
#define elf_info_to_howto_rel NULL
|
||
#define elf_info_to_howto fr30_info_to_howto_rela
|
||
#define elf_backend_relocate_section fr30_elf_relocate_section
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
|
||
|
||
#include "elf32-target.h"
|