1996-08-31 03:32:13 +02:00
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/* V850-specific support for 32-bit ELF
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Copyright (C) 1994, 1995 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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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 v850_info_to_howto_rel
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
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1996-09-04 05:03:53 +02:00
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static bfd_reloc_status_type bfd_elf32_v850_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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1996-08-31 03:32:13 +02:00
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/* Try to minimize the amount of space occupied by relocation tables
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on the ROM (not that the ROM won't be swamped by other ELF overhead). */
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#define USE_REL
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enum reloc_type
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{
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R_V850_NONE = 0,
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R_V850_9_PCREL,
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R_V850_22_PCREL,
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R_V850_HI16_S,
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R_V850_HI16,
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R_V850_LO16,
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1996-08-31 18:24:18 +02:00
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R_V850_32,
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R_V850_16,
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R_V850_8,
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1996-10-17 06:45:29 +02:00
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R_V850_SDA_OFFSET,
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R_V850_ZDA_OFFSET,
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R_V850_TDA_OFFSET,
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1996-08-31 03:32:13 +02:00
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R_V850_max
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};
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static reloc_howto_type elf_v850_howto_table[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_V850_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_V850_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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/* A PC relative 9 bit branch. */
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HOWTO (R_V850_9_PCREL, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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1996-09-04 05:03:53 +02:00
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bfd_elf32_v850_reloc, /* special_function */
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1996-08-31 03:32:13 +02:00
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"R_V850_9_PCREL", /* name */
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false, /* partial_inplace */
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0x00ffffff, /* src_mask */
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0x00ffffff, /* dst_mask */
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true), /* pcrel_offset */
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/* A PC relative 22 bit branch. */
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HOWTO (R_V850_22_PCREL, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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22, /* bitsize */
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true, /* pc_relative */
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7, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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1996-09-04 05:03:53 +02:00
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bfd_elf32_v850_reloc, /* special_function */
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1996-08-31 03:32:13 +02:00
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"R_V850_22_PCREL", /* name */
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false, /* partial_inplace */
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0x07ffff80, /* src_mask */
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0x07ffff80, /* dst_mask */
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true), /* pcrel_offset */
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/* High 16 bits of symbol value. */
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HOWTO (R_V850_HI16_S, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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1996-09-04 05:03:53 +02:00
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0, /* bitpos */
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1996-08-31 03:32:13 +02:00
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complain_overflow_dont,/* complain_on_overflow */
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1996-09-04 05:03:53 +02:00
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bfd_elf32_v850_reloc, /* special_function */
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1996-08-31 03:32:13 +02:00
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"R_V850_HI16_S", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* High 16 bits of symbol value. */
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HOWTO (R_V850_HI16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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1996-09-04 05:03:53 +02:00
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0, /* bitpos */
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1996-08-31 03:32:13 +02:00
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complain_overflow_dont,/* complain_on_overflow */
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1996-09-04 05:03:53 +02:00
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bfd_elf32_v850_reloc, /* special_function */
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1996-08-31 03:32:13 +02:00
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"R_V850_HI16", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Low 16 bits of symbol value. */
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HOWTO (R_V850_LO16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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1996-09-04 05:03:53 +02:00
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0, /* bitpos */
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1996-08-31 03:32:13 +02:00
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_V850_LO16", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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1996-08-31 18:24:18 +02:00
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/* Simple 32bit reloc. */
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HOWTO (R_V850_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_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_V850_32", /* name */
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1996-09-04 05:03:53 +02:00
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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1996-08-31 18:24:18 +02:00
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Simple 16bit reloc. */
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HOWTO (R_V850_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* 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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bfd_elf_generic_reloc, /* special_function */
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"R_V850_16", /* name */
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1996-09-04 05:03:53 +02:00
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true, /* partial_inplace */
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0xffff, /* src_mask */
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1996-08-31 18:24:18 +02:00
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Simple 8bit reloc. */
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HOWTO (R_V850_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* 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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bfd_elf_generic_reloc, /* special_function */
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"R_V850_8", /* name */
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1996-09-04 05:03:53 +02:00
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true, /* partial_inplace */
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0xff, /* src_mask */
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1996-08-31 18:24:18 +02:00
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0xff, /* dst_mask */
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false), /* pcrel_offset */
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1996-10-17 06:45:29 +02:00
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/* Offset from the short data area pointer. */
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HOWTO (R_V850_SDA_OFFSET, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* 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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bfd_elf_generic_reloc, /* special_function */
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"R_V850_SDA_OFFSET", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Offset from the tiny data area pointer. */
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HOWTO (R_V850_TDA_OFFSET, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* 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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bfd_elf_generic_reloc, /* special_function */
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"R_V850_TDA_OFFSET", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Offset from the zero data area pointer. */
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HOWTO (R_V850_ZDA_OFFSET, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* 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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bfd_elf_generic_reloc, /* special_function */
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"R_V850_ZDA_OFFSET", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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1996-08-31 03:32:13 +02:00
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};
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/* Map BFD reloc types to V850 ELF reloc types. */
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struct v850_reloc_map
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{
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unsigned char bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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static const struct v850_reloc_map v850_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_V850_NONE, },
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{ BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL, },
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{ BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL, },
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{ BFD_RELOC_HI16_S, R_V850_HI16_S, },
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{ BFD_RELOC_HI16, R_V850_HI16, },
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{ BFD_RELOC_LO16, R_V850_LO16, },
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1996-08-31 18:24:18 +02:00
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{ BFD_RELOC_32, R_V850_32, },
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{ BFD_RELOC_16, R_V850_16, },
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{ BFD_RELOC_8, R_V850_8, },
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1996-10-17 06:45:29 +02:00
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{ BFD_RELOC_V850_TDA_OFFSET, R_V850_TDA_OFFSET, },
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{ BFD_RELOC_V850_SDA_OFFSET, R_V850_SDA_OFFSET, },
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{ BFD_RELOC_V850_ZDA_OFFSET, R_V850_ZDA_OFFSET, },
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1996-08-31 03:32:13 +02:00
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};
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static reloc_howto_type *
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bfd_elf32_bfd_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 = 0;
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i < sizeof (v850_reloc_map) / sizeof (struct v850_reloc_map);
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i++)
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{
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if (v850_reloc_map[i].bfd_reloc_val == code)
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return &elf_v850_howto_table[v850_reloc_map[i].elf_reloc_val];
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}
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return NULL;
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}
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/* Set the howto pointer for an V850 ELF reloc. */
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static void
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v850_info_to_howto_rel (abfd, cache_ptr, dst)
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bfd *abfd;
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arelent *cache_ptr;
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Elf32_Internal_Rel *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_V850_max);
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cache_ptr->howto = &elf_v850_howto_table[r_type];
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}
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1996-09-04 05:03:53 +02:00
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static bfd_reloc_status_type
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bfd_elf32_v850_reloc (abfd, reloc, symbol, data, isection, obfd, err)
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bfd *abfd;
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arelent *reloc;
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asymbol *symbol;
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PTR data;
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asection *isection;
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bfd *obfd;
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char **err;
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{
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if (obfd != (bfd *) NULL
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&& (symbol->flags & BSF_SECTION_SYM) == 0
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&& (! reloc->howto->partial_inplace
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|| reloc->addend == 0))
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{
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reloc->address += isection->output_offset;
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return bfd_reloc_ok;
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}
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else if (obfd != NULL)
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{
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return bfd_reloc_continue;
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}
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1996-10-16 06:18:51 +02:00
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/* Catch relocs involving undefined symbols. */
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if (bfd_is_und_section (symbol->section)
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&& (symbol->flags & BSF_WEAK) == 0
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&& obfd == NULL)
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return bfd_reloc_undefined;
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1996-09-04 05:03:53 +02:00
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/* We handle final linking of some relocs ourselves. */
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{
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long relocation, insn;
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/* Is the address of the relocation really within the section? */
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|
if (reloc->address > isection->_cooked_size)
|
|
|
|
return bfd_reloc_outofrange;
|
|
|
|
|
|
|
|
/* Work out which section the relocation is targetted at and the
|
|
|
|
initial relocation command value. */
|
|
|
|
|
|
|
|
/* Get symbol value. (Common symbols are special.) */
|
|
|
|
if (bfd_is_com_section (symbol->section))
|
|
|
|
relocation = 0;
|
|
|
|
else
|
|
|
|
relocation = symbol->value;
|
|
|
|
|
|
|
|
/* Convert input-section-relative symbol value to absolute + addend. */
|
|
|
|
relocation += symbol->section->output_section->vma;
|
|
|
|
relocation += symbol->section->output_offset;
|
|
|
|
relocation += reloc->addend;
|
|
|
|
|
|
|
|
if (reloc->howto->pc_relative == true)
|
|
|
|
{
|
|
|
|
/* Here the variable relocation holds the final address of the
|
|
|
|
symbol we are relocating against, plus any addend. */
|
|
|
|
relocation -= isection->output_section->vma + isection->output_offset;
|
|
|
|
|
|
|
|
/* Deal with pcrel_offset */
|
|
|
|
relocation -= reloc->address;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* I've got no clue... */
|
|
|
|
reloc->addend = 0;
|
|
|
|
|
|
|
|
if (reloc->howto->type == R_V850_22_PCREL)
|
|
|
|
{
|
|
|
|
if (relocation > 0x1ffff || relocation < -0x200000)
|
|
|
|
return bfd_reloc_overflow;
|
|
|
|
|
|
|
|
if ((relocation % 2) != 0)
|
|
|
|
return bfd_reloc_dangerous;
|
|
|
|
|
|
|
|
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc->address);
|
1996-10-16 19:26:50 +02:00
|
|
|
insn &= ~0xfffe003f;
|
1996-09-04 05:03:53 +02:00
|
|
|
insn |= (((relocation & 0xfffe) << 16)
|
|
|
|
| ((relocation & 0x3f0000) >> 16));
|
|
|
|
bfd_put_32 (abfd, insn, (bfd_byte *)data + reloc->address);
|
|
|
|
return bfd_reloc_ok;
|
|
|
|
}
|
|
|
|
else if (reloc->howto->type == R_V850_9_PCREL)
|
|
|
|
{
|
|
|
|
if (relocation > 0xff || relocation < -0x100)
|
|
|
|
return bfd_reloc_overflow;
|
|
|
|
|
|
|
|
if ((relocation % 2) != 0)
|
|
|
|
return bfd_reloc_dangerous;
|
|
|
|
|
|
|
|
insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc->address);
|
1996-10-16 19:26:50 +02:00
|
|
|
insn &= 0xf870;
|
1996-09-04 05:03:53 +02:00
|
|
|
insn |= ((relocation & 0x1f0) << 7) | ((relocation & 0x0e) << 3);
|
|
|
|
bfd_put_16 (abfd, insn, (bfd_byte *)data + reloc->address);
|
|
|
|
return bfd_reloc_ok;
|
|
|
|
}
|
|
|
|
else if (reloc->howto->type == R_V850_HI16_S)
|
|
|
|
{
|
1996-10-16 01:19:29 +02:00
|
|
|
relocation += bfd_get_16 (abfd, (bfd_byte *) data + reloc->address);
|
1996-09-04 05:03:53 +02:00
|
|
|
relocation = (relocation >> 16) + ((relocation & 0x8000) != 0);
|
|
|
|
bfd_put_16 (abfd, relocation, (bfd_byte *)data + reloc->address);
|
|
|
|
return bfd_reloc_ok;
|
|
|
|
}
|
|
|
|
else if (reloc->howto->type == R_V850_HI16)
|
|
|
|
{
|
1996-10-16 01:19:29 +02:00
|
|
|
relocation += bfd_get_16 (abfd, (bfd_byte *) data + reloc->address);
|
1996-09-04 05:03:53 +02:00
|
|
|
relocation = (relocation >> 16);
|
|
|
|
bfd_put_16 (abfd, relocation, (bfd_byte *)data + reloc->address);
|
|
|
|
return bfd_reloc_ok;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return bfd_reloc_continue;
|
|
|
|
}
|
|
|
|
|
1996-10-16 01:19:29 +02:00
|
|
|
static boolean bfd_elf32_v850_is_local_label PARAMS ((bfd *, asymbol *));
|
|
|
|
|
|
|
|
/*ARGSUSED*/
|
|
|
|
static boolean
|
|
|
|
bfd_elf32_v850_is_local_label (abfd, symbol)
|
|
|
|
bfd *abfd;
|
|
|
|
asymbol *symbol;
|
|
|
|
{
|
|
|
|
return ((symbol->name[0] == '.' && (symbol->name[1] == 'L' || symbol->name[1] == '.'))
|
|
|
|
|| (symbol->name[0] == '_' && symbol->name[1] == '.' && symbol->name[2] == 'L'
|
|
|
|
&& symbol->name[3] == '_'));
|
|
|
|
}
|
|
|
|
|
|
|
|
#define bfd_elf32_bfd_is_local_label bfd_elf32_v850_is_local_label
|
|
|
|
|
1996-09-04 05:03:53 +02:00
|
|
|
#define TARGET_LITTLE_SYM bfd_elf32_v850_vec
|
|
|
|
#define TARGET_LITTLE_NAME "elf32-v850"
|
1996-08-31 03:32:13 +02:00
|
|
|
#define ELF_ARCH bfd_arch_v850
|
|
|
|
#define ELF_MACHINE_CODE EM_CYGNUS_V850
|
|
|
|
#define ELF_MAXPAGESIZE 0x1000
|
|
|
|
|
|
|
|
#define elf_info_to_howto 0
|
|
|
|
#define elf_info_to_howto_rel v850_info_to_howto_rel
|
|
|
|
|
1996-10-16 01:19:29 +02:00
|
|
|
#define elf_symbol_leading_char '_'
|
|
|
|
|
1996-08-31 03:32:13 +02:00
|
|
|
#include "elf32-target.h"
|