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julius |
/* BFD back-end for National Semiconductor's CR16 ELF
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Copyright 2007 Free Software Foundation, Inc.
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Written by M R Swami Reddy.
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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 3 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 Foundation,
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Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "libiberty.h"
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#include "elf-bfd.h"
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#include "elf/cr16.h"
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/* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */
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struct cr16_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */
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unsigned short cr16_reloc_type; /* CR16 relocation type. */
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};
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static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] =
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{
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{BFD_RELOC_NONE, R_CR16_NONE},
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{BFD_RELOC_CR16_NUM8, R_CR16_NUM8},
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{BFD_RELOC_CR16_NUM16, R_CR16_NUM16},
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{BFD_RELOC_CR16_NUM32, R_CR16_NUM32},
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{BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a},
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{BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4},
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{BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a},
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{BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14},
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{BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a},
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{BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16},
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{BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20},
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{BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a},
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{BFD_RELOC_CR16_ABS20, R_CR16_ABS20},
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{BFD_RELOC_CR16_ABS24, R_CR16_ABS24},
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{BFD_RELOC_CR16_IMM4, R_CR16_IMM4},
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{BFD_RELOC_CR16_IMM8, R_CR16_IMM8},
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{BFD_RELOC_CR16_IMM16, R_CR16_IMM16},
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{BFD_RELOC_CR16_IMM20, R_CR16_IMM20},
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{BFD_RELOC_CR16_IMM24, R_CR16_IMM24},
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{BFD_RELOC_CR16_IMM32, R_CR16_IMM32},
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{BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a},
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{BFD_RELOC_CR16_DISP4, R_CR16_DISP4},
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{BFD_RELOC_CR16_DISP8, R_CR16_DISP8},
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{BFD_RELOC_CR16_DISP16, R_CR16_DISP16},
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{BFD_RELOC_CR16_DISP24, R_CR16_DISP24},
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{BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a},
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{BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8},
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{BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16},
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{BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32}
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};
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static reloc_howto_type cr16_elf_howto_table[] =
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{
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HOWTO (R_CR16_NONE, /* type */
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0, /* rightshift */
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2, /* size */
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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_CR16_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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HOWTO (R_CR16_NUM8, /* type */
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0, /* rightshift */
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0, /* size */
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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_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_NUM8", /* name */
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FALSE, /* partial_inplace */
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0xff, /* src_mask */
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0xff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_NUM16, /* type */
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0, /* rightshift */
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1, /* size */
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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_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_NUM16", /* name */
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FALSE, /* 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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HOWTO (R_CR16_NUM32, /* type */
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0, /* rightshift */
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2, /* size */
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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_CR16_NUM32", /* name */
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FALSE, /* 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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HOWTO (R_CR16_NUM32a, /* type */
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1, /* rightshift */
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2, /* size */
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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_CR16_NUM32a", /* name */
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FALSE, /* 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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HOWTO (R_CR16_REGREL4, /* type */
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0, /* rightshift */
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0, /* size */
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4, /* 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_CR16_REGREL4", /* name */
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FALSE, /* partial_inplace */
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0xf, /* src_mask */
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0xf, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL4a, /* type */
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0, /* rightshift */
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0, /* size */
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4, /* 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_CR16_REGREL4a", /* name */
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FALSE, /* partial_inplace */
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0xf, /* src_mask */
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0xf, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL14, /* type */
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0, /* rightshift */
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1, /* size */
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14, /* 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_CR16_REGREL14", /* name */
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FALSE, /* partial_inplace */
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0x3fff, /* src_mask */
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0x3fff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL14a, /* type */
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0, /* rightshift */
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1, /* size */
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14, /* 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_CR16_REGREL14a", /* name */
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FALSE, /* partial_inplace */
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0x3fff, /* src_mask */
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0x3fff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL16, /* type */
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0, /* rightshift */
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1, /* size */
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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_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_REGREL16", /* name */
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FALSE, /* 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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HOWTO (R_CR16_REGREL20, /* type */
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0, /* rightshift */
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2, /* size */
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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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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_REGREL20", /* name */
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FALSE, /* partial_inplace */
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0xfffff, /* src_mask */
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0xfffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_REGREL20a, /* type */
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0, /* rightshift */
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2, /* size */
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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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bfd_elf_generic_reloc, /* special_function */
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"R_CR16_REGREL20a", /* name */
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FALSE, /* partial_inplace */
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0xfffff, /* src_mask */
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0xfffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_CR16_ABS20, /* type */
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0, /* rightshift */
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2, /* size */
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20, /* bitsize */
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FALSE, /* pc_relative */
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| 245 |
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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| 247 |
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bfd_elf_generic_reloc, /* special_function */
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| 248 |
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"R_CR16_ABS20", /* name */
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| 249 |
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FALSE, /* partial_inplace */
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| 250 |
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0xfffff, /* src_mask */
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| 251 |
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0xfffff, /* dst_mask */
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| 252 |
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FALSE), /* pcrel_offset */
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| 254 |
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HOWTO (R_CR16_ABS24, /* type */
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| 255 |
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0, /* rightshift */
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2, /* size */
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| 257 |
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24, /* bitsize */
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| 258 |
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FALSE, /* pc_relative */
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| 259 |
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0, /* bitpos */
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| 260 |
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complain_overflow_bitfield,/* complain_on_overflow */
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| 261 |
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bfd_elf_generic_reloc, /* special_function */
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| 262 |
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"R_CR16_ABS24", /* name */
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| 263 |
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FALSE, /* partial_inplace */
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| 264 |
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0xffffff, /* src_mask */
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| 265 |
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0xffffff, /* dst_mask */
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| 266 |
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FALSE), /* pcrel_offset */
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| 267 |
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| 268 |
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HOWTO (R_CR16_IMM4, /* type */
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| 269 |
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0, /* rightshift */
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| 270 |
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0, /* size */
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| 271 |
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4, /* bitsize */
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| 272 |
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FALSE, /* pc_relative */
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| 273 |
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0, /* bitpos */
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| 274 |
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complain_overflow_bitfield,/* complain_on_overflow */
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| 275 |
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bfd_elf_generic_reloc, /* special_function */
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| 276 |
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"R_CR16_IMM4", /* name */
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| 277 |
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FALSE, /* partial_inplace */
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| 278 |
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0xf, /* src_mask */
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| 279 |
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0xf, /* dst_mask */
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| 280 |
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FALSE), /* pcrel_offset */
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| 281 |
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| 282 |
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HOWTO (R_CR16_IMM8, /* type */
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| 283 |
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0, /* rightshift */
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| 284 |
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0, /* size */
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| 285 |
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8, /* bitsize */
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| 286 |
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FALSE, /* pc_relative */
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| 287 |
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0, /* bitpos */
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| 288 |
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complain_overflow_bitfield,/* complain_on_overflow */
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| 289 |
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bfd_elf_generic_reloc, /* special_function */
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| 290 |
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"R_CR16_IMM8", /* name */
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| 291 |
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FALSE, /* partial_inplace */
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| 292 |
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0xff, /* src_mask */
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| 293 |
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0xff, /* dst_mask */
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| 294 |
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FALSE), /* pcrel_offset */
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| 295 |
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| 296 |
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HOWTO (R_CR16_IMM16, /* type */
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| 297 |
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0, /* rightshift */
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| 298 |
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1, /* size */
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| 299 |
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16, /* bitsize */
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| 300 |
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FALSE, /* pc_relative */
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| 301 |
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0, /* bitpos */
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| 302 |
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complain_overflow_bitfield,/* complain_on_overflow */
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| 303 |
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bfd_elf_generic_reloc, /* special_function */
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| 304 |
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"R_CR16_IMM16", /* name */
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| 305 |
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FALSE, /* partial_inplace */
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| 306 |
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0xffff, /* src_mask */
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| 307 |
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0xffff, /* dst_mask */
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| 308 |
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FALSE), /* pcrel_offset */
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| 309 |
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| 310 |
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HOWTO (R_CR16_IMM20, /* type */
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| 311 |
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0, /* rightshift */
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| 312 |
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2, /* size */
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| 313 |
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20, /* bitsize */
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| 314 |
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FALSE, /* pc_relative */
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| 315 |
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0, /* bitpos */
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| 316 |
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complain_overflow_bitfield,/* complain_on_overflow */
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| 317 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 318 |
|
|
"R_CR16_IMM20", /* name */
|
| 319 |
|
|
FALSE, /* partial_inplace */
|
| 320 |
|
|
0xfffff, /* src_mask */
|
| 321 |
|
|
0xfffff, /* dst_mask */
|
| 322 |
|
|
FALSE), /* pcrel_offset */
|
| 323 |
|
|
|
| 324 |
|
|
HOWTO (R_CR16_IMM24, /* type */
|
| 325 |
|
|
0, /* rightshift */
|
| 326 |
|
|
2, /* size */
|
| 327 |
|
|
24, /* bitsize */
|
| 328 |
|
|
FALSE, /* pc_relative */
|
| 329 |
|
|
0, /* bitpos */
|
| 330 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 331 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 332 |
|
|
"R_CR16_IMM24", /* name */
|
| 333 |
|
|
FALSE, /* partial_inplace */
|
| 334 |
|
|
0xffffff, /* src_mask */
|
| 335 |
|
|
0xffffff, /* dst_mask */
|
| 336 |
|
|
FALSE), /* pcrel_offset */
|
| 337 |
|
|
|
| 338 |
|
|
HOWTO (R_CR16_IMM32, /* type */
|
| 339 |
|
|
0, /* rightshift */
|
| 340 |
|
|
2, /* size */
|
| 341 |
|
|
32, /* bitsize */
|
| 342 |
|
|
FALSE, /* pc_relative */
|
| 343 |
|
|
0, /* bitpos */
|
| 344 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 345 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 346 |
|
|
"R_CR16_IMM32", /* name */
|
| 347 |
|
|
FALSE, /* partial_inplace */
|
| 348 |
|
|
0xffffffff, /* src_mask */
|
| 349 |
|
|
0xffffffff, /* dst_mask */
|
| 350 |
|
|
FALSE), /* pcrel_offset */
|
| 351 |
|
|
|
| 352 |
|
|
HOWTO (R_CR16_IMM32a, /* type */
|
| 353 |
|
|
1, /* rightshift */
|
| 354 |
|
|
2, /* size */
|
| 355 |
|
|
32, /* bitsize */
|
| 356 |
|
|
FALSE, /* pc_relative */
|
| 357 |
|
|
0, /* bitpos */
|
| 358 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 359 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 360 |
|
|
"R_CR16_IMM32a", /* name */
|
| 361 |
|
|
FALSE, /* partial_inplace */
|
| 362 |
|
|
0xffffffff, /* src_mask */
|
| 363 |
|
|
0xffffffff, /* dst_mask */
|
| 364 |
|
|
FALSE), /* pcrel_offset */
|
| 365 |
|
|
|
| 366 |
|
|
HOWTO (R_CR16_DISP4, /* type */
|
| 367 |
|
|
1, /* rightshift */
|
| 368 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 369 |
|
|
4, /* bitsize */
|
| 370 |
|
|
TRUE, /* pc_relative */
|
| 371 |
|
|
0, /* bitpos */
|
| 372 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 373 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 374 |
|
|
"R_CR16_DISP4", /* name */
|
| 375 |
|
|
FALSE, /* partial_inplace */
|
| 376 |
|
|
0xf, /* src_mask */
|
| 377 |
|
|
0xf, /* dst_mask */
|
| 378 |
|
|
FALSE), /* pcrel_offset */
|
| 379 |
|
|
|
| 380 |
|
|
HOWTO (R_CR16_DISP8, /* type */
|
| 381 |
|
|
1, /* rightshift */
|
| 382 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 383 |
|
|
8, /* bitsize */
|
| 384 |
|
|
TRUE, /* pc_relative */
|
| 385 |
|
|
0, /* bitpos */
|
| 386 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 387 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 388 |
|
|
"R_CR16_DISP8", /* name */
|
| 389 |
|
|
FALSE, /* partial_inplace */
|
| 390 |
|
|
0x1ff, /* src_mask */
|
| 391 |
|
|
0x1ff, /* dst_mask */
|
| 392 |
|
|
FALSE), /* pcrel_offset */
|
| 393 |
|
|
|
| 394 |
|
|
HOWTO (R_CR16_DISP16, /* type */
|
| 395 |
|
|
0, /* rightshift REVIITS: To sync with WinIDEA*/
|
| 396 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
| 397 |
|
|
16, /* bitsize */
|
| 398 |
|
|
TRUE, /* pc_relative */
|
| 399 |
|
|
0, /* bitpos */
|
| 400 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 401 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 402 |
|
|
"R_CR16_DISP16", /* name */
|
| 403 |
|
|
FALSE, /* partial_inplace */
|
| 404 |
|
|
0x1ffff, /* src_mask */
|
| 405 |
|
|
0x1ffff, /* dst_mask */
|
| 406 |
|
|
FALSE), /* pcrel_offset */
|
| 407 |
|
|
/* REVISIT: DISP24 should be left-shift by 2 as per ISA doc
|
| 408 |
|
|
but its not done, to sync with WinIDEA and CR16 4.1 tools */
|
| 409 |
|
|
HOWTO (R_CR16_DISP24, /* type */
|
| 410 |
|
|
0, /* rightshift */
|
| 411 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
| 412 |
|
|
24, /* bitsize */
|
| 413 |
|
|
TRUE, /* pc_relative */
|
| 414 |
|
|
0, /* bitpos */
|
| 415 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 416 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 417 |
|
|
"R_CR16_DISP24", /* name */
|
| 418 |
|
|
FALSE, /* partial_inplace */
|
| 419 |
|
|
0x1ffffff, /* src_mask */
|
| 420 |
|
|
0x1ffffff, /* dst_mask */
|
| 421 |
|
|
FALSE), /* pcrel_offset */
|
| 422 |
|
|
|
| 423 |
|
|
HOWTO (R_CR16_DISP24a, /* type */
|
| 424 |
|
|
0, /* rightshift */
|
| 425 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
| 426 |
|
|
24, /* bitsize */
|
| 427 |
|
|
TRUE, /* pc_relative */
|
| 428 |
|
|
0, /* bitpos */
|
| 429 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 430 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 431 |
|
|
"R_CR16_DISP24a", /* name */
|
| 432 |
|
|
FALSE, /* partial_inplace */
|
| 433 |
|
|
0xffffff, /* src_mask */
|
| 434 |
|
|
0xffffff, /* dst_mask */
|
| 435 |
|
|
FALSE), /* pcrel_offset */
|
| 436 |
|
|
|
| 437 |
|
|
/* An 8 bit switch table entry. This is generated for an expression
|
| 438 |
|
|
such as ``.byte L1 - L2''. The offset holds the difference
|
| 439 |
|
|
between the reloc address and L2. */
|
| 440 |
|
|
HOWTO (R_CR16_SWITCH8, /* type */
|
| 441 |
|
|
0, /* rightshift */
|
| 442 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 443 |
|
|
8, /* bitsize */
|
| 444 |
|
|
FALSE, /* pc_relative */
|
| 445 |
|
|
0, /* bitpos */
|
| 446 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 447 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 448 |
|
|
"R_CR16_SWITCH8", /* name */
|
| 449 |
|
|
FALSE, /* partial_inplace */
|
| 450 |
|
|
0xff, /* src_mask */
|
| 451 |
|
|
0xff, /* dst_mask */
|
| 452 |
|
|
TRUE), /* pcrel_offset */
|
| 453 |
|
|
|
| 454 |
|
|
/* A 16 bit switch table entry. This is generated for an expression
|
| 455 |
|
|
such as ``.word L1 - L2''. The offset holds the difference
|
| 456 |
|
|
between the reloc address and L2. */
|
| 457 |
|
|
HOWTO (R_CR16_SWITCH16, /* type */
|
| 458 |
|
|
0, /* rightshift */
|
| 459 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
| 460 |
|
|
16, /* bitsize */
|
| 461 |
|
|
FALSE, /* pc_relative */
|
| 462 |
|
|
0, /* bitpos */
|
| 463 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 464 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 465 |
|
|
"R_CR16_SWITCH16", /* name */
|
| 466 |
|
|
FALSE, /* partial_inplace */
|
| 467 |
|
|
0xffff, /* src_mask */
|
| 468 |
|
|
0xffff, /* dst_mask */
|
| 469 |
|
|
TRUE), /* pcrel_offset */
|
| 470 |
|
|
|
| 471 |
|
|
/* A 32 bit switch table entry. This is generated for an expression
|
| 472 |
|
|
such as ``.long L1 - L2''. The offset holds the difference
|
| 473 |
|
|
between the reloc address and L2. */
|
| 474 |
|
|
HOWTO (R_CR16_SWITCH32, /* type */
|
| 475 |
|
|
0, /* rightshift */
|
| 476 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
| 477 |
|
|
32, /* bitsize */
|
| 478 |
|
|
FALSE, /* pc_relative */
|
| 479 |
|
|
0, /* bitpos */
|
| 480 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 481 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 482 |
|
|
"R_CR16_SWITCH32", /* name */
|
| 483 |
|
|
FALSE, /* partial_inplace */
|
| 484 |
|
|
0xffffffff, /* src_mask */
|
| 485 |
|
|
0xffffffff, /* dst_mask */
|
| 486 |
|
|
TRUE) /* pcrel_offset */
|
| 487 |
|
|
};
|
| 488 |
|
|
|
| 489 |
|
|
/* Retrieve a howto ptr using a BFD reloc_code. */
|
| 490 |
|
|
|
| 491 |
|
|
static reloc_howto_type *
|
| 492 |
|
|
elf_cr16_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 493 |
|
|
bfd_reloc_code_real_type code)
|
| 494 |
|
|
{
|
| 495 |
|
|
unsigned int i;
|
| 496 |
|
|
|
| 497 |
|
|
for (i = 0; i < R_CR16_MAX; i++)
|
| 498 |
|
|
if (code == cr16_reloc_map[i].bfd_reloc_enum)
|
| 499 |
|
|
return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type];
|
| 500 |
|
|
|
| 501 |
|
|
_bfd_error_handler ("Unsupported CR16 relocation type: 0x%x\n", code);
|
| 502 |
|
|
return NULL;
|
| 503 |
|
|
}
|
| 504 |
|
|
|
| 505 |
|
|
static reloc_howto_type *
|
| 506 |
|
|
elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 507 |
|
|
const char *r_name)
|
| 508 |
|
|
{
|
| 509 |
|
|
unsigned int i;
|
| 510 |
|
|
|
| 511 |
|
|
for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++)
|
| 512 |
|
|
if (cr16_elf_howto_table[i].name != NULL
|
| 513 |
|
|
&& strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0)
|
| 514 |
|
|
return cr16_elf_howto_table + i;
|
| 515 |
|
|
|
| 516 |
|
|
return NULL;
|
| 517 |
|
|
}
|
| 518 |
|
|
|
| 519 |
|
|
/* Retrieve a howto ptr using an internal relocation entry. */
|
| 520 |
|
|
|
| 521 |
|
|
static void
|
| 522 |
|
|
elf_cr16_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
|
| 523 |
|
|
Elf_Internal_Rela *dst)
|
| 524 |
|
|
{
|
| 525 |
|
|
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
|
| 526 |
|
|
|
| 527 |
|
|
BFD_ASSERT (r_type < (unsigned int) R_CR16_MAX);
|
| 528 |
|
|
cache_ptr->howto = &cr16_elf_howto_table[r_type];
|
| 529 |
|
|
}
|
| 530 |
|
|
|
| 531 |
|
|
/* Perform a relocation as part of a final link. */
|
| 532 |
|
|
|
| 533 |
|
|
static bfd_reloc_status_type
|
| 534 |
|
|
cr16_elf_final_link_relocate (reloc_howto_type *howto,
|
| 535 |
|
|
bfd *input_bfd,
|
| 536 |
|
|
bfd *output_bfd ATTRIBUTE_UNUSED,
|
| 537 |
|
|
asection *input_section,
|
| 538 |
|
|
bfd_byte *contents,
|
| 539 |
|
|
bfd_vma offset,
|
| 540 |
|
|
bfd_vma Rvalue,
|
| 541 |
|
|
bfd_vma addend,
|
| 542 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
| 543 |
|
|
asection *sec ATTRIBUTE_UNUSED,
|
| 544 |
|
|
int is_local ATTRIBUTE_UNUSED)
|
| 545 |
|
|
{
|
| 546 |
|
|
unsigned short r_type = howto->type;
|
| 547 |
|
|
bfd_byte *hit_data = contents + offset;
|
| 548 |
|
|
bfd_vma reloc_bits, check, Rvalue1;
|
| 549 |
|
|
|
| 550 |
|
|
switch (r_type)
|
| 551 |
|
|
{
|
| 552 |
|
|
case R_CR16_IMM4:
|
| 553 |
|
|
case R_CR16_IMM20:
|
| 554 |
|
|
case R_CR16_ABS20:
|
| 555 |
|
|
break;
|
| 556 |
|
|
|
| 557 |
|
|
case R_CR16_IMM8:
|
| 558 |
|
|
case R_CR16_IMM16:
|
| 559 |
|
|
case R_CR16_IMM32:
|
| 560 |
|
|
case R_CR16_IMM32a:
|
| 561 |
|
|
case R_CR16_REGREL4:
|
| 562 |
|
|
case R_CR16_REGREL4a:
|
| 563 |
|
|
case R_CR16_REGREL14:
|
| 564 |
|
|
case R_CR16_REGREL14a:
|
| 565 |
|
|
case R_CR16_REGREL16:
|
| 566 |
|
|
case R_CR16_REGREL20:
|
| 567 |
|
|
case R_CR16_ABS24:
|
| 568 |
|
|
case R_CR16_DISP16:
|
| 569 |
|
|
case R_CR16_DISP24:
|
| 570 |
|
|
/* 'hit_data' is relative to the start of the instruction, not the
|
| 571 |
|
|
relocation offset. Advance it to account for the exact offset. */
|
| 572 |
|
|
hit_data += 2;
|
| 573 |
|
|
break;
|
| 574 |
|
|
|
| 575 |
|
|
case R_CR16_NONE:
|
| 576 |
|
|
return bfd_reloc_ok;
|
| 577 |
|
|
break;
|
| 578 |
|
|
|
| 579 |
|
|
case R_CR16_DISP4:
|
| 580 |
|
|
if (is_local)
|
| 581 |
|
|
Rvalue += -1;
|
| 582 |
|
|
break;
|
| 583 |
|
|
|
| 584 |
|
|
case R_CR16_DISP8:
|
| 585 |
|
|
case R_CR16_DISP24a:
|
| 586 |
|
|
if (is_local)
|
| 587 |
|
|
Rvalue -= -1;
|
| 588 |
|
|
break;
|
| 589 |
|
|
|
| 590 |
|
|
case R_CR16_SWITCH8:
|
| 591 |
|
|
case R_CR16_SWITCH16:
|
| 592 |
|
|
case R_CR16_SWITCH32:
|
| 593 |
|
|
/* We only care about the addend, where the difference between
|
| 594 |
|
|
expressions is kept. */
|
| 595 |
|
|
Rvalue = 0;
|
| 596 |
|
|
|
| 597 |
|
|
default:
|
| 598 |
|
|
break;
|
| 599 |
|
|
}
|
| 600 |
|
|
|
| 601 |
|
|
if (howto->pc_relative)
|
| 602 |
|
|
{
|
| 603 |
|
|
/* Subtract the address of the section containing the location. */
|
| 604 |
|
|
Rvalue -= (input_section->output_section->vma
|
| 605 |
|
|
+ input_section->output_offset);
|
| 606 |
|
|
/* Subtract the position of the location within the section. */
|
| 607 |
|
|
Rvalue -= offset;
|
| 608 |
|
|
}
|
| 609 |
|
|
|
| 610 |
|
|
/* Add in supplied addend. */
|
| 611 |
|
|
Rvalue += addend;
|
| 612 |
|
|
|
| 613 |
|
|
/* Complain if the bitfield overflows, whether it is considered
|
| 614 |
|
|
as signed or unsigned. */
|
| 615 |
|
|
check = Rvalue >> howto->rightshift;
|
| 616 |
|
|
|
| 617 |
|
|
/* Assumes two's complement. This expression avoids
|
| 618 |
|
|
overflow if howto->bitsize is the number of bits in
|
| 619 |
|
|
bfd_vma. */
|
| 620 |
|
|
reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
|
| 621 |
|
|
|
| 622 |
|
|
if (((bfd_vma) check & ~reloc_bits) != 0
|
| 623 |
|
|
&& (((bfd_vma) check & ~reloc_bits)
|
| 624 |
|
|
!= (-(bfd_vma) 1 & ~reloc_bits)))
|
| 625 |
|
|
{
|
| 626 |
|
|
/* The above right shift is incorrect for a signed
|
| 627 |
|
|
value. See if turning on the upper bits fixes the
|
| 628 |
|
|
overflow. */
|
| 629 |
|
|
if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
|
| 630 |
|
|
{
|
| 631 |
|
|
check |= ((bfd_vma) - 1
|
| 632 |
|
|
& ~((bfd_vma) - 1
|
| 633 |
|
|
>> howto->rightshift));
|
| 634 |
|
|
|
| 635 |
|
|
if (((bfd_vma) check & ~reloc_bits)
|
| 636 |
|
|
!= (-(bfd_vma) 1 & ~reloc_bits))
|
| 637 |
|
|
return bfd_reloc_overflow;
|
| 638 |
|
|
}
|
| 639 |
|
|
else
|
| 640 |
|
|
return bfd_reloc_overflow;
|
| 641 |
|
|
}
|
| 642 |
|
|
|
| 643 |
|
|
/* Drop unwanted bits from the value we are relocating to. */
|
| 644 |
|
|
Rvalue >>= (bfd_vma) howto->rightshift;
|
| 645 |
|
|
|
| 646 |
|
|
/* Apply dst_mask to select only relocatable part of the insn. */
|
| 647 |
|
|
Rvalue &= howto->dst_mask;
|
| 648 |
|
|
|
| 649 |
|
|
switch (howto->size)
|
| 650 |
|
|
{
|
| 651 |
|
|
case 0:
|
| 652 |
|
|
if (r_type == R_CR16_DISP8)
|
| 653 |
|
|
{
|
| 654 |
|
|
Rvalue1 = bfd_get_16 (input_bfd, hit_data);
|
| 655 |
|
|
Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00)
|
| 656 |
|
|
| (Rvalue1 & 0x00f0) | (Rvalue & 0xf));
|
| 657 |
|
|
bfd_put_16 (input_bfd, Rvalue, hit_data);
|
| 658 |
|
|
}
|
| 659 |
|
|
else if (r_type == R_CR16_IMM4)
|
| 660 |
|
|
{
|
| 661 |
|
|
Rvalue1 = bfd_get_16 (input_bfd, hit_data);
|
| 662 |
|
|
Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0)
|
| 663 |
|
|
| ((Rvalue1 & 0x0f00) >> 8));
|
| 664 |
|
|
bfd_put_16 (input_bfd, Rvalue, hit_data);
|
| 665 |
|
|
}
|
| 666 |
|
|
else if (r_type == R_CR16_DISP4)
|
| 667 |
|
|
{
|
| 668 |
|
|
Rvalue1 = bfd_get_16 (input_bfd, hit_data);
|
| 669 |
|
|
Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4));
|
| 670 |
|
|
bfd_put_16 (input_bfd, Rvalue, hit_data);
|
| 671 |
|
|
}
|
| 672 |
|
|
else
|
| 673 |
|
|
{
|
| 674 |
|
|
bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
|
| 675 |
|
|
}
|
| 676 |
|
|
break;
|
| 677 |
|
|
|
| 678 |
|
|
case 1:
|
| 679 |
|
|
if (r_type == R_CR16_DISP16)
|
| 680 |
|
|
{
|
| 681 |
|
|
Rvalue |= (bfd_get_16 (input_bfd, hit_data));
|
| 682 |
|
|
Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1));
|
| 683 |
|
|
}
|
| 684 |
|
|
|
| 685 |
|
|
bfd_put_16 (input_bfd, Rvalue, hit_data);
|
| 686 |
|
|
break;
|
| 687 |
|
|
|
| 688 |
|
|
case 2:
|
| 689 |
|
|
if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20))
|
| 690 |
|
|
{
|
| 691 |
|
|
bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
|
| 692 |
|
|
| ((Rvalue >> 16) & 0xf), hit_data);
|
| 693 |
|
|
bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
|
| 694 |
|
|
}
|
| 695 |
|
|
else
|
| 696 |
|
|
{
|
| 697 |
|
|
if (r_type == R_CR16_ABS24)
|
| 698 |
|
|
{
|
| 699 |
|
|
Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >> 16) & 0xf) << 8)
|
| 700 |
|
|
| (bfd_get_16 (input_bfd, hit_data)))
|
| 701 |
|
|
| ((Rvalue & 0xffff) << 16));
|
| 702 |
|
|
}
|
| 703 |
|
|
if (r_type == R_CR16_DISP24)
|
| 704 |
|
|
{
|
| 705 |
|
|
Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf) << 8)
|
| 706 |
|
|
| (bfd_get_16 (input_bfd, hit_data)))
|
| 707 |
|
|
| (((Rvalue & 0xfffe)
|
| 708 |
|
|
| ((Rvalue >> 24) & 0x1)) << 16));
|
| 709 |
|
|
}
|
| 710 |
|
|
else if ((r_type == R_CR16_IMM32) ||(r_type == R_CR16_IMM32a))
|
| 711 |
|
|
{
|
| 712 |
|
|
Rvalue = (((Rvalue >> 16)& 0xffff)
|
| 713 |
|
|
| (bfd_get_16 (input_bfd, hit_data)))
|
| 714 |
|
|
| ((Rvalue & 0xffff) << 16);
|
| 715 |
|
|
}
|
| 716 |
|
|
else if (r_type == R_CR16_DISP24a)
|
| 717 |
|
|
{
|
| 718 |
|
|
Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23)));
|
| 719 |
|
|
Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16)
|
| 720 |
|
|
| (bfd_get_32 (input_bfd, hit_data));
|
| 721 |
|
|
}
|
| 722 |
|
|
|
| 723 |
|
|
bfd_put_32 (input_bfd, Rvalue, hit_data);
|
| 724 |
|
|
}
|
| 725 |
|
|
break;
|
| 726 |
|
|
|
| 727 |
|
|
default:
|
| 728 |
|
|
return bfd_reloc_notsupported;
|
| 729 |
|
|
}
|
| 730 |
|
|
|
| 731 |
|
|
return bfd_reloc_ok;
|
| 732 |
|
|
}
|
| 733 |
|
|
|
| 734 |
|
|
/* Delete some bytes from a section while relaxing. */
|
| 735 |
|
|
|
| 736 |
|
|
static bfd_boolean
|
| 737 |
|
|
elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
|
| 738 |
|
|
asection *sec, bfd_vma addr, int count)
|
| 739 |
|
|
{
|
| 740 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 741 |
|
|
unsigned int sec_shndx;
|
| 742 |
|
|
bfd_byte *contents;
|
| 743 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
| 744 |
|
|
Elf_Internal_Rela *irelalign;
|
| 745 |
|
|
bfd_vma toaddr;
|
| 746 |
|
|
Elf_Internal_Sym *isym;
|
| 747 |
|
|
Elf_Internal_Sym *isymend;
|
| 748 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 749 |
|
|
struct elf_link_hash_entry **end_hashes;
|
| 750 |
|
|
struct elf_link_hash_entry **start_hashes;
|
| 751 |
|
|
unsigned int symcount;
|
| 752 |
|
|
|
| 753 |
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
| 754 |
|
|
|
| 755 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
| 756 |
|
|
|
| 757 |
|
|
/* The deletion must stop at the next ALIGN reloc for an aligment
|
| 758 |
|
|
power larger than the number of bytes we are deleting. */
|
| 759 |
|
|
irelalign = NULL;
|
| 760 |
|
|
toaddr = sec->size;
|
| 761 |
|
|
|
| 762 |
|
|
irel = elf_section_data (sec)->relocs;
|
| 763 |
|
|
irelend = irel + sec->reloc_count;
|
| 764 |
|
|
|
| 765 |
|
|
/* Actually delete the bytes. */
|
| 766 |
|
|
memmove (contents + addr, contents + addr + count,
|
| 767 |
|
|
(size_t) (toaddr - addr - count));
|
| 768 |
|
|
sec->size -= count;
|
| 769 |
|
|
|
| 770 |
|
|
/* Adjust all the relocs. */
|
| 771 |
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
| 772 |
|
|
/* Get the new reloc address. */
|
| 773 |
|
|
if ((irel->r_offset > addr && irel->r_offset < toaddr))
|
| 774 |
|
|
irel->r_offset -= count;
|
| 775 |
|
|
|
| 776 |
|
|
/* Adjust the local symbols defined in this section. */
|
| 777 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 778 |
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 779 |
|
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
| 780 |
|
|
{
|
| 781 |
|
|
if (isym->st_shndx == sec_shndx
|
| 782 |
|
|
&& isym->st_value > addr
|
| 783 |
|
|
&& isym->st_value < toaddr)
|
| 784 |
|
|
{
|
| 785 |
|
|
/* Adjust the addend of SWITCH relocations in this section,
|
| 786 |
|
|
which reference this local symbol. */
|
| 787 |
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
| 788 |
|
|
{
|
| 789 |
|
|
unsigned long r_symndx;
|
| 790 |
|
|
Elf_Internal_Sym *rsym;
|
| 791 |
|
|
bfd_vma addsym, subsym;
|
| 792 |
|
|
|
| 793 |
|
|
/* Skip if not a SWITCH relocation. */
|
| 794 |
|
|
if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8
|
| 795 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16
|
| 796 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32)
|
| 797 |
|
|
continue;
|
| 798 |
|
|
|
| 799 |
|
|
r_symndx = ELF32_R_SYM (irel->r_info);
|
| 800 |
|
|
rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
|
| 801 |
|
|
|
| 802 |
|
|
/* Skip if not the local adjusted symbol. */
|
| 803 |
|
|
if (rsym != isym)
|
| 804 |
|
|
continue;
|
| 805 |
|
|
|
| 806 |
|
|
addsym = isym->st_value;
|
| 807 |
|
|
subsym = addsym - irel->r_addend;
|
| 808 |
|
|
|
| 809 |
|
|
/* Fix the addend only when -->> (addsym > addr >= subsym). */
|
| 810 |
|
|
if (subsym <= addr)
|
| 811 |
|
|
irel->r_addend -= count;
|
| 812 |
|
|
else
|
| 813 |
|
|
continue;
|
| 814 |
|
|
}
|
| 815 |
|
|
|
| 816 |
|
|
isym->st_value -= count;
|
| 817 |
|
|
}
|
| 818 |
|
|
}
|
| 819 |
|
|
|
| 820 |
|
|
/* Now adjust the global symbols defined in this section. */
|
| 821 |
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
| 822 |
|
|
- symtab_hdr->sh_info);
|
| 823 |
|
|
sym_hashes = start_hashes = elf_sym_hashes (abfd);
|
| 824 |
|
|
end_hashes = sym_hashes + symcount;
|
| 825 |
|
|
|
| 826 |
|
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
| 827 |
|
|
{
|
| 828 |
|
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
| 829 |
|
|
|
| 830 |
|
|
/* The '--wrap SYMBOL' option is causing a pain when the object file,
|
| 831 |
|
|
containing the definition of __wrap_SYMBOL, includes a direct
|
| 832 |
|
|
call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
|
| 833 |
|
|
the same symbol (which is __wrap_SYMBOL), but still exist as two
|
| 834 |
|
|
different symbols in 'sym_hashes', we don't want to adjust
|
| 835 |
|
|
the global symbol __wrap_SYMBOL twice.
|
| 836 |
|
|
This check is only relevant when symbols are being wrapped. */
|
| 837 |
|
|
if (link_info->wrap_hash != NULL)
|
| 838 |
|
|
{
|
| 839 |
|
|
struct elf_link_hash_entry **cur_sym_hashes;
|
| 840 |
|
|
|
| 841 |
|
|
/* Loop only over the symbols whom been already checked. */
|
| 842 |
|
|
for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
|
| 843 |
|
|
cur_sym_hashes++)
|
| 844 |
|
|
/* If the current symbol is identical to 'sym_hash', that means
|
| 845 |
|
|
the symbol was already adjusted (or at least checked). */
|
| 846 |
|
|
if (*cur_sym_hashes == sym_hash)
|
| 847 |
|
|
break;
|
| 848 |
|
|
|
| 849 |
|
|
/* Don't adjust the symbol again. */
|
| 850 |
|
|
if (cur_sym_hashes < sym_hashes)
|
| 851 |
|
|
continue;
|
| 852 |
|
|
}
|
| 853 |
|
|
|
| 854 |
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
| 855 |
|
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
| 856 |
|
|
&& sym_hash->root.u.def.section == sec
|
| 857 |
|
|
&& sym_hash->root.u.def.value > addr
|
| 858 |
|
|
&& sym_hash->root.u.def.value < toaddr)
|
| 859 |
|
|
sym_hash->root.u.def.value -= count;
|
| 860 |
|
|
}
|
| 861 |
|
|
|
| 862 |
|
|
return TRUE;
|
| 863 |
|
|
}
|
| 864 |
|
|
|
| 865 |
|
|
/* Relocate a CR16 ELF section. */
|
| 866 |
|
|
|
| 867 |
|
|
static bfd_boolean
|
| 868 |
|
|
elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
|
| 869 |
|
|
bfd *input_bfd, asection *input_section,
|
| 870 |
|
|
bfd_byte *contents, Elf_Internal_Rela *relocs,
|
| 871 |
|
|
Elf_Internal_Sym *local_syms,
|
| 872 |
|
|
asection **local_sections)
|
| 873 |
|
|
{
|
| 874 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 875 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 876 |
|
|
Elf_Internal_Rela *rel, *relend;
|
| 877 |
|
|
|
| 878 |
|
|
if (info->relocatable)
|
| 879 |
|
|
return TRUE;
|
| 880 |
|
|
|
| 881 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 882 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
| 883 |
|
|
|
| 884 |
|
|
rel = relocs;
|
| 885 |
|
|
relend = relocs + input_section->reloc_count;
|
| 886 |
|
|
for (; rel < relend; rel++)
|
| 887 |
|
|
{
|
| 888 |
|
|
int r_type;
|
| 889 |
|
|
reloc_howto_type *howto;
|
| 890 |
|
|
unsigned long r_symndx;
|
| 891 |
|
|
Elf_Internal_Sym *sym;
|
| 892 |
|
|
asection *sec;
|
| 893 |
|
|
struct elf_link_hash_entry *h;
|
| 894 |
|
|
bfd_vma relocation;
|
| 895 |
|
|
bfd_reloc_status_type r;
|
| 896 |
|
|
|
| 897 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 898 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
| 899 |
|
|
howto = cr16_elf_howto_table + (r_type);
|
| 900 |
|
|
|
| 901 |
|
|
h = NULL;
|
| 902 |
|
|
sym = NULL;
|
| 903 |
|
|
sec = NULL;
|
| 904 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 905 |
|
|
{
|
| 906 |
|
|
sym = local_syms + r_symndx;
|
| 907 |
|
|
sec = local_sections[r_symndx];
|
| 908 |
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
| 909 |
|
|
}
|
| 910 |
|
|
else
|
| 911 |
|
|
{
|
| 912 |
|
|
bfd_boolean unresolved_reloc, warned;
|
| 913 |
|
|
|
| 914 |
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
| 915 |
|
|
r_symndx, symtab_hdr, sym_hashes,
|
| 916 |
|
|
h, sec, relocation,
|
| 917 |
|
|
unresolved_reloc, warned);
|
| 918 |
|
|
}
|
| 919 |
|
|
|
| 920 |
|
|
r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd,
|
| 921 |
|
|
input_section,
|
| 922 |
|
|
contents, rel->r_offset,
|
| 923 |
|
|
relocation, rel->r_addend,
|
| 924 |
|
|
info, sec, h == NULL);
|
| 925 |
|
|
|
| 926 |
|
|
if (r != bfd_reloc_ok)
|
| 927 |
|
|
{
|
| 928 |
|
|
const char *name;
|
| 929 |
|
|
const char *msg = NULL;
|
| 930 |
|
|
|
| 931 |
|
|
if (h != NULL)
|
| 932 |
|
|
name = h->root.root.string;
|
| 933 |
|
|
else
|
| 934 |
|
|
{
|
| 935 |
|
|
name = (bfd_elf_string_from_elf_section
|
| 936 |
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
| 937 |
|
|
if (name == NULL || *name == '\0')
|
| 938 |
|
|
name = bfd_section_name (input_bfd, sec);
|
| 939 |
|
|
}
|
| 940 |
|
|
|
| 941 |
|
|
switch (r)
|
| 942 |
|
|
{
|
| 943 |
|
|
case bfd_reloc_overflow:
|
| 944 |
|
|
if (!((*info->callbacks->reloc_overflow)
|
| 945 |
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
| 946 |
|
|
(bfd_vma) 0, input_bfd, input_section,
|
| 947 |
|
|
rel->r_offset)))
|
| 948 |
|
|
return FALSE;
|
| 949 |
|
|
break;
|
| 950 |
|
|
|
| 951 |
|
|
case bfd_reloc_undefined:
|
| 952 |
|
|
if (!((*info->callbacks->undefined_symbol)
|
| 953 |
|
|
(info, name, input_bfd, input_section,
|
| 954 |
|
|
rel->r_offset, TRUE)))
|
| 955 |
|
|
return FALSE;
|
| 956 |
|
|
break;
|
| 957 |
|
|
|
| 958 |
|
|
case bfd_reloc_outofrange:
|
| 959 |
|
|
msg = _("internal error: out of range error");
|
| 960 |
|
|
goto common_error;
|
| 961 |
|
|
|
| 962 |
|
|
case bfd_reloc_notsupported:
|
| 963 |
|
|
msg = _("internal error: unsupported relocation error");
|
| 964 |
|
|
goto common_error;
|
| 965 |
|
|
|
| 966 |
|
|
case bfd_reloc_dangerous:
|
| 967 |
|
|
msg = _("internal error: dangerous error");
|
| 968 |
|
|
goto common_error;
|
| 969 |
|
|
|
| 970 |
|
|
default:
|
| 971 |
|
|
msg = _("internal error: unknown error");
|
| 972 |
|
|
/* Fall through. */
|
| 973 |
|
|
|
| 974 |
|
|
common_error:
|
| 975 |
|
|
if (!((*info->callbacks->warning)
|
| 976 |
|
|
(info, msg, name, input_bfd, input_section,
|
| 977 |
|
|
rel->r_offset)))
|
| 978 |
|
|
return FALSE;
|
| 979 |
|
|
break;
|
| 980 |
|
|
}
|
| 981 |
|
|
}
|
| 982 |
|
|
}
|
| 983 |
|
|
|
| 984 |
|
|
return TRUE;
|
| 985 |
|
|
}
|
| 986 |
|
|
|
| 987 |
|
|
/* This is a version of bfd_generic_get_relocated_section_contents
|
| 988 |
|
|
which uses elf32_cr16_relocate_section. */
|
| 989 |
|
|
|
| 990 |
|
|
static bfd_byte *
|
| 991 |
|
|
elf32_cr16_get_relocated_section_contents (bfd *output_bfd,
|
| 992 |
|
|
struct bfd_link_info *link_info,
|
| 993 |
|
|
struct bfd_link_order *link_order,
|
| 994 |
|
|
bfd_byte *data,
|
| 995 |
|
|
bfd_boolean relocatable,
|
| 996 |
|
|
asymbol **symbols)
|
| 997 |
|
|
{
|
| 998 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 999 |
|
|
asection *input_section = link_order->u.indirect.section;
|
| 1000 |
|
|
bfd *input_bfd = input_section->owner;
|
| 1001 |
|
|
asection **sections = NULL;
|
| 1002 |
|
|
Elf_Internal_Rela *internal_relocs = NULL;
|
| 1003 |
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
| 1004 |
|
|
|
| 1005 |
|
|
/* We only need to handle the case of relaxing, or of having a
|
| 1006 |
|
|
particular set of section contents, specially. */
|
| 1007 |
|
|
if (relocatable
|
| 1008 |
|
|
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
| 1009 |
|
|
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
| 1010 |
|
|
link_order, data,
|
| 1011 |
|
|
relocatable,
|
| 1012 |
|
|
symbols);
|
| 1013 |
|
|
|
| 1014 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 1015 |
|
|
|
| 1016 |
|
|
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
| 1017 |
|
|
(size_t) input_section->size);
|
| 1018 |
|
|
|
| 1019 |
|
|
if ((input_section->flags & SEC_RELOC) != 0
|
| 1020 |
|
|
&& input_section->reloc_count > 0)
|
| 1021 |
|
|
{
|
| 1022 |
|
|
Elf_Internal_Sym *isym;
|
| 1023 |
|
|
Elf_Internal_Sym *isymend;
|
| 1024 |
|
|
asection **secpp;
|
| 1025 |
|
|
bfd_size_type amt;
|
| 1026 |
|
|
|
| 1027 |
|
|
internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
|
| 1028 |
|
|
NULL, NULL, FALSE);
|
| 1029 |
|
|
if (internal_relocs == NULL)
|
| 1030 |
|
|
goto error_return;
|
| 1031 |
|
|
|
| 1032 |
|
|
if (symtab_hdr->sh_info != 0)
|
| 1033 |
|
|
{
|
| 1034 |
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 1035 |
|
|
if (isymbuf == NULL)
|
| 1036 |
|
|
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
|
| 1037 |
|
|
symtab_hdr->sh_info, 0,
|
| 1038 |
|
|
NULL, NULL, NULL);
|
| 1039 |
|
|
if (isymbuf == NULL)
|
| 1040 |
|
|
goto error_return;
|
| 1041 |
|
|
}
|
| 1042 |
|
|
|
| 1043 |
|
|
amt = symtab_hdr->sh_info;
|
| 1044 |
|
|
amt *= sizeof (asection *);
|
| 1045 |
|
|
sections = bfd_malloc (amt);
|
| 1046 |
|
|
if (sections == NULL && amt != 0)
|
| 1047 |
|
|
goto error_return;
|
| 1048 |
|
|
|
| 1049 |
|
|
isymend = isymbuf + symtab_hdr->sh_info;
|
| 1050 |
|
|
for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
|
| 1051 |
|
|
{
|
| 1052 |
|
|
asection *isec;
|
| 1053 |
|
|
|
| 1054 |
|
|
if (isym->st_shndx == SHN_UNDEF)
|
| 1055 |
|
|
isec = bfd_und_section_ptr;
|
| 1056 |
|
|
else if (isym->st_shndx == SHN_ABS)
|
| 1057 |
|
|
isec = bfd_abs_section_ptr;
|
| 1058 |
|
|
else if (isym->st_shndx == SHN_COMMON)
|
| 1059 |
|
|
isec = bfd_com_section_ptr;
|
| 1060 |
|
|
else
|
| 1061 |
|
|
isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
|
| 1062 |
|
|
|
| 1063 |
|
|
*secpp = isec;
|
| 1064 |
|
|
}
|
| 1065 |
|
|
|
| 1066 |
|
|
if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd,
|
| 1067 |
|
|
input_section, data, internal_relocs,
|
| 1068 |
|
|
isymbuf, sections))
|
| 1069 |
|
|
goto error_return;
|
| 1070 |
|
|
|
| 1071 |
|
|
if (sections != NULL)
|
| 1072 |
|
|
free (sections);
|
| 1073 |
|
|
if (isymbuf != NULL
|
| 1074 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1075 |
|
|
free (isymbuf);
|
| 1076 |
|
|
if (elf_section_data (input_section)->relocs != internal_relocs)
|
| 1077 |
|
|
free (internal_relocs);
|
| 1078 |
|
|
}
|
| 1079 |
|
|
|
| 1080 |
|
|
return data;
|
| 1081 |
|
|
|
| 1082 |
|
|
error_return:
|
| 1083 |
|
|
if (sections != NULL)
|
| 1084 |
|
|
free (sections);
|
| 1085 |
|
|
if (isymbuf != NULL
|
| 1086 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1087 |
|
|
free (isymbuf);
|
| 1088 |
|
|
if (internal_relocs != NULL
|
| 1089 |
|
|
&& elf_section_data (input_section)->relocs != internal_relocs)
|
| 1090 |
|
|
free (internal_relocs);
|
| 1091 |
|
|
return NULL;
|
| 1092 |
|
|
}
|
| 1093 |
|
|
|
| 1094 |
|
|
/* This function handles relaxing for the CR16.
|
| 1095 |
|
|
|
| 1096 |
|
|
There's quite a few relaxing opportunites available on the CR16:
|
| 1097 |
|
|
|
| 1098 |
|
|
* bcond:24 -> bcond:16 2 bytes
|
| 1099 |
|
|
* bcond:16 -> bcond:8 2 bytes
|
| 1100 |
|
|
* arithmetic imm32 -> arithmetic imm20/imm16 2 bytes
|
| 1101 |
|
|
* arithmetic imm20/imm16 -> arithmetic imm4 2 bytes
|
| 1102 |
|
|
|
| 1103 |
|
|
Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
|
| 1104 |
|
|
|
| 1105 |
|
|
static bfd_boolean
|
| 1106 |
|
|
elf32_cr16_relax_section (bfd *abfd, asection *sec,
|
| 1107 |
|
|
struct bfd_link_info *link_info, bfd_boolean *again)
|
| 1108 |
|
|
{
|
| 1109 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 1110 |
|
|
Elf_Internal_Rela *internal_relocs;
|
| 1111 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
| 1112 |
|
|
bfd_byte *contents = NULL;
|
| 1113 |
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
| 1114 |
|
|
|
| 1115 |
|
|
/* Assume nothing changes. */
|
| 1116 |
|
|
*again = FALSE;
|
| 1117 |
|
|
|
| 1118 |
|
|
/* We don't have to do anything for a relocatable link, if
|
| 1119 |
|
|
this section does not have relocs, or if this is not a
|
| 1120 |
|
|
code section. */
|
| 1121 |
|
|
if (link_info->relocatable
|
| 1122 |
|
|
|| (sec->flags & SEC_RELOC) == 0
|
| 1123 |
|
|
|| sec->reloc_count == 0
|
| 1124 |
|
|
|| (sec->flags & SEC_CODE) == 0)
|
| 1125 |
|
|
return TRUE;
|
| 1126 |
|
|
|
| 1127 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 1128 |
|
|
|
| 1129 |
|
|
/* Get a copy of the native relocations. */
|
| 1130 |
|
|
internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
|
| 1131 |
|
|
link_info->keep_memory);
|
| 1132 |
|
|
if (internal_relocs == NULL)
|
| 1133 |
|
|
goto error_return;
|
| 1134 |
|
|
|
| 1135 |
|
|
/* Walk through them looking for relaxing opportunities. */
|
| 1136 |
|
|
irelend = internal_relocs + sec->reloc_count;
|
| 1137 |
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
| 1138 |
|
|
{
|
| 1139 |
|
|
bfd_vma symval;
|
| 1140 |
|
|
|
| 1141 |
|
|
/* If this isn't something that can be relaxed, then ignore
|
| 1142 |
|
|
this reloc. */
|
| 1143 |
|
|
if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16
|
| 1144 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24
|
| 1145 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32
|
| 1146 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20
|
| 1147 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16)
|
| 1148 |
|
|
continue;
|
| 1149 |
|
|
|
| 1150 |
|
|
/* Get the section contents if we haven't done so already. */
|
| 1151 |
|
|
if (contents == NULL)
|
| 1152 |
|
|
{
|
| 1153 |
|
|
/* Get cached copy if it exists. */
|
| 1154 |
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
| 1155 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
| 1156 |
|
|
/* Go get them off disk. */
|
| 1157 |
|
|
else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
| 1158 |
|
|
goto error_return;
|
| 1159 |
|
|
}
|
| 1160 |
|
|
|
| 1161 |
|
|
/* Read this BFD's local symbols if we haven't done so already. */
|
| 1162 |
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
| 1163 |
|
|
{
|
| 1164 |
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 1165 |
|
|
if (isymbuf == NULL)
|
| 1166 |
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
| 1167 |
|
|
symtab_hdr->sh_info, 0,
|
| 1168 |
|
|
NULL, NULL, NULL);
|
| 1169 |
|
|
if (isymbuf == NULL)
|
| 1170 |
|
|
goto error_return;
|
| 1171 |
|
|
}
|
| 1172 |
|
|
|
| 1173 |
|
|
/* Get the value of the symbol referred to by the reloc. */
|
| 1174 |
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
| 1175 |
|
|
{
|
| 1176 |
|
|
/* A local symbol. */
|
| 1177 |
|
|
Elf_Internal_Sym *isym;
|
| 1178 |
|
|
asection *sym_sec;
|
| 1179 |
|
|
|
| 1180 |
|
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
| 1181 |
|
|
if (isym->st_shndx == SHN_UNDEF)
|
| 1182 |
|
|
sym_sec = bfd_und_section_ptr;
|
| 1183 |
|
|
else if (isym->st_shndx == SHN_ABS)
|
| 1184 |
|
|
sym_sec = bfd_abs_section_ptr;
|
| 1185 |
|
|
else if (isym->st_shndx == SHN_COMMON)
|
| 1186 |
|
|
sym_sec = bfd_com_section_ptr;
|
| 1187 |
|
|
else
|
| 1188 |
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
| 1189 |
|
|
symval = (isym->st_value
|
| 1190 |
|
|
+ sym_sec->output_section->vma
|
| 1191 |
|
|
+ sym_sec->output_offset);
|
| 1192 |
|
|
}
|
| 1193 |
|
|
else
|
| 1194 |
|
|
{
|
| 1195 |
|
|
unsigned long indx;
|
| 1196 |
|
|
struct elf_link_hash_entry *h;
|
| 1197 |
|
|
|
| 1198 |
|
|
/* An external symbol. */
|
| 1199 |
|
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
| 1200 |
|
|
h = elf_sym_hashes (abfd)[indx];
|
| 1201 |
|
|
BFD_ASSERT (h != NULL);
|
| 1202 |
|
|
|
| 1203 |
|
|
if (h->root.type != bfd_link_hash_defined
|
| 1204 |
|
|
&& h->root.type != bfd_link_hash_defweak)
|
| 1205 |
|
|
/* This appears to be a reference to an undefined
|
| 1206 |
|
|
symbol. Just ignore it--it will be caught by the
|
| 1207 |
|
|
regular reloc processing. */
|
| 1208 |
|
|
continue;
|
| 1209 |
|
|
|
| 1210 |
|
|
symval = (h->root.u.def.value
|
| 1211 |
|
|
+ h->root.u.def.section->output_section->vma
|
| 1212 |
|
|
+ h->root.u.def.section->output_offset);
|
| 1213 |
|
|
}
|
| 1214 |
|
|
|
| 1215 |
|
|
/* For simplicity of coding, we are going to modify the section
|
| 1216 |
|
|
contents, the section relocs, and the BFD symbol table. We
|
| 1217 |
|
|
must tell the rest of the code not to free up this
|
| 1218 |
|
|
information. It would be possible to instead create a table
|
| 1219 |
|
|
of changes which have to be made, as is done in coff-mips.c;
|
| 1220 |
|
|
that would be more work, but would require less memory when
|
| 1221 |
|
|
the linker is run. */
|
| 1222 |
|
|
|
| 1223 |
|
|
/* Try to turn a 24 branch/call into a 16bit relative
|
| 1224 |
|
|
branch/call. */
|
| 1225 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24)
|
| 1226 |
|
|
{
|
| 1227 |
|
|
bfd_vma value = symval;
|
| 1228 |
|
|
|
| 1229 |
|
|
/* Deal with pc-relative gunk. */
|
| 1230 |
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
| 1231 |
|
|
value -= irel->r_offset;
|
| 1232 |
|
|
value += irel->r_addend;
|
| 1233 |
|
|
|
| 1234 |
|
|
/* See if the value will fit in 16 bits, note the high value is
|
| 1235 |
|
|
0xfffe + 2 as the target will be two bytes closer if we are
|
| 1236 |
|
|
able to relax. */
|
| 1237 |
|
|
if ((long) value < 0x10000 && (long) value > -0x10002)
|
| 1238 |
|
|
{
|
| 1239 |
|
|
unsigned int code;
|
| 1240 |
|
|
|
| 1241 |
|
|
/* Get the opcode. */
|
| 1242 |
|
|
code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset);
|
| 1243 |
|
|
|
| 1244 |
|
|
/* Verify it's a 'bcond' and fix the opcode. */
|
| 1245 |
|
|
if ((code & 0xffff) == 0x0010)
|
| 1246 |
|
|
{
|
| 1247 |
|
|
bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), contents + irel->r_offset);
|
| 1248 |
|
|
bfd_put_16 (abfd, value, contents + irel->r_offset + 2);
|
| 1249 |
|
|
}
|
| 1250 |
|
|
else
|
| 1251 |
|
|
continue;
|
| 1252 |
|
|
|
| 1253 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1254 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1255 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1256 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1257 |
|
|
|
| 1258 |
|
|
/* Fix the relocation's type. */
|
| 1259 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1260 |
|
|
R_CR16_DISP16);
|
| 1261 |
|
|
|
| 1262 |
|
|
/* Delete two bytes of data. */
|
| 1263 |
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
| 1264 |
|
|
irel->r_offset + 2, 2))
|
| 1265 |
|
|
goto error_return;
|
| 1266 |
|
|
|
| 1267 |
|
|
/* That will change things, so, we should relax again.
|
| 1268 |
|
|
Note that this is not required, and it may be slow. */
|
| 1269 |
|
|
*again = TRUE;
|
| 1270 |
|
|
}
|
| 1271 |
|
|
}
|
| 1272 |
|
|
|
| 1273 |
|
|
/* Try to turn a 16-bit pc-relative branch into an
|
| 1274 |
|
|
8-bit pc-relative branch. */
|
| 1275 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16)
|
| 1276 |
|
|
{
|
| 1277 |
|
|
bfd_vma value = symval;
|
| 1278 |
|
|
|
| 1279 |
|
|
/* Deal with pc-relative gunk. */
|
| 1280 |
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
| 1281 |
|
|
value -= irel->r_offset;
|
| 1282 |
|
|
value += irel->r_addend;
|
| 1283 |
|
|
|
| 1284 |
|
|
/* See if the value will fit in 8 bits, note the high value is
|
| 1285 |
|
|
0xfc + 2 as the target will be two bytes closer if we are
|
| 1286 |
|
|
able to relax. */
|
| 1287 |
|
|
if ((long) value < 0xfe && (long) value > -0x100)
|
| 1288 |
|
|
{
|
| 1289 |
|
|
unsigned short code;
|
| 1290 |
|
|
|
| 1291 |
|
|
/* Get the opcode. */
|
| 1292 |
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
| 1293 |
|
|
|
| 1294 |
|
|
/* Verify it's a 'bcond' opcode. */
|
| 1295 |
|
|
if ((code & 0xff00) == 0x1800)
|
| 1296 |
|
|
{
|
| 1297 |
|
|
bfd_put_8 (abfd, 0x1 | ((0xf & (code >> 4)) << 4), contents + irel->r_offset);
|
| 1298 |
|
|
bfd_put_8 (abfd, value, contents + irel->r_offset + 2);
|
| 1299 |
|
|
}
|
| 1300 |
|
|
else
|
| 1301 |
|
|
continue;
|
| 1302 |
|
|
|
| 1303 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1304 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1305 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1306 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1307 |
|
|
|
| 1308 |
|
|
/* Fix the relocation's type. */
|
| 1309 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1310 |
|
|
R_CR16_DISP8);
|
| 1311 |
|
|
|
| 1312 |
|
|
/* Delete two bytes of data. */
|
| 1313 |
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
| 1314 |
|
|
irel->r_offset + 2, 2))
|
| 1315 |
|
|
goto error_return;
|
| 1316 |
|
|
|
| 1317 |
|
|
/* That will change things, so, we should relax again.
|
| 1318 |
|
|
Note that this is not required, and it may be slow. */
|
| 1319 |
|
|
*again = TRUE;
|
| 1320 |
|
|
}
|
| 1321 |
|
|
}
|
| 1322 |
|
|
|
| 1323 |
|
|
/* Try to turn a 32bit immediate address into
|
| 1324 |
|
|
a 20/16bit immediate address. */
|
| 1325 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32)
|
| 1326 |
|
|
{
|
| 1327 |
|
|
bfd_vma value = symval;
|
| 1328 |
|
|
unsigned short is_add_mov = 0;
|
| 1329 |
|
|
|
| 1330 |
|
|
/* See if the value will fit in 20 bits. */
|
| 1331 |
|
|
if ((long) value < 0xfffff && (long) value > 0)
|
| 1332 |
|
|
{
|
| 1333 |
|
|
unsigned short code;
|
| 1334 |
|
|
|
| 1335 |
|
|
/* Get the opcode. */
|
| 1336 |
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
| 1337 |
|
|
|
| 1338 |
|
|
/* Verify it's a arithmetic ADDD or MOVD instruction.
|
| 1339 |
|
|
For ADDD and MOVD only, convert to IMM32 -> IMM20. */
|
| 1340 |
|
|
if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020))
|
| 1341 |
|
|
is_add_mov = 1;
|
| 1342 |
|
|
|
| 1343 |
|
|
if (is_add_mov)
|
| 1344 |
|
|
{
|
| 1345 |
|
|
/* Note that we've changed the relocs, section contents,
|
| 1346 |
|
|
etc. */
|
| 1347 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1348 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1349 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1350 |
|
|
|
| 1351 |
|
|
/* Fix the opcode. */
|
| 1352 |
|
|
if ((code & 0xfff0) == 0x0070) /* For movd. */
|
| 1353 |
|
|
bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1);
|
| 1354 |
|
|
else /* code == 0x0020 for addd. */
|
| 1355 |
|
|
bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1);
|
| 1356 |
|
|
|
| 1357 |
|
|
bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset);
|
| 1358 |
|
|
|
| 1359 |
|
|
|
| 1360 |
|
|
/* Fix the relocation's type. */
|
| 1361 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1362 |
|
|
R_CR16_IMM20);
|
| 1363 |
|
|
/* Delete two bytes of data. */
|
| 1364 |
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
| 1365 |
|
|
irel->r_offset + 2, 2))
|
| 1366 |
|
|
goto error_return;
|
| 1367 |
|
|
|
| 1368 |
|
|
/* That will change things, so, we should relax again.
|
| 1369 |
|
|
Note that this is not required, and it may be slow. */
|
| 1370 |
|
|
*again = TRUE;
|
| 1371 |
|
|
}
|
| 1372 |
|
|
}
|
| 1373 |
|
|
/* See if the value will fit in 16 bits. */
|
| 1374 |
|
|
if ((!is_add_mov) && ((long) value < 0x7fff && (long) value > 0))
|
| 1375 |
|
|
{
|
| 1376 |
|
|
unsigned short code;
|
| 1377 |
|
|
|
| 1378 |
|
|
/* Get the opcode. */
|
| 1379 |
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
| 1380 |
|
|
|
| 1381 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1382 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1383 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1384 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1385 |
|
|
|
| 1386 |
|
|
/* Fix the opcode. */
|
| 1387 |
|
|
if ((code & 0xf0) == 0x70) /* For movd. */
|
| 1388 |
|
|
bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1);
|
| 1389 |
|
|
else if ((code & 0xf0) == 0x20) /* For addd. */
|
| 1390 |
|
|
bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1);
|
| 1391 |
|
|
else if ((code & 0xf0) == 0x90) /* For cmpd. */
|
| 1392 |
|
|
bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1);
|
| 1393 |
|
|
else
|
| 1394 |
|
|
continue;
|
| 1395 |
|
|
|
| 1396 |
|
|
bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset);
|
| 1397 |
|
|
|
| 1398 |
|
|
/* Fix the relocation's type. */
|
| 1399 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1400 |
|
|
R_CR16_IMM16);
|
| 1401 |
|
|
|
| 1402 |
|
|
/* Delete two bytes of data. */
|
| 1403 |
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
| 1404 |
|
|
irel->r_offset + 2, 2))
|
| 1405 |
|
|
goto error_return;
|
| 1406 |
|
|
|
| 1407 |
|
|
/* That will change things, so, we should relax again.
|
| 1408 |
|
|
Note that this is not required, and it may be slow. */
|
| 1409 |
|
|
*again = TRUE;
|
| 1410 |
|
|
}
|
| 1411 |
|
|
}
|
| 1412 |
|
|
|
| 1413 |
|
|
/* Try to turn a 20/16bit immediate address into
|
| 1414 |
|
|
a 4bit immediate address. */
|
| 1415 |
|
|
if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
|
| 1416 |
|
|
|| (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16))
|
| 1417 |
|
|
{
|
| 1418 |
|
|
bfd_vma value = symval;
|
| 1419 |
|
|
|
| 1420 |
|
|
/* See if the value will fit in 4 bits. */
|
| 1421 |
|
|
if ((long) value < 0xf && (long) value > 0)
|
| 1422 |
|
|
{
|
| 1423 |
|
|
unsigned short code;
|
| 1424 |
|
|
|
| 1425 |
|
|
/* Get the opcode. */
|
| 1426 |
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
| 1427 |
|
|
|
| 1428 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1429 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1430 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1431 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1432 |
|
|
|
| 1433 |
|
|
/* Fix the opcode. */
|
| 1434 |
|
|
if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500))
|
| 1435 |
|
|
{
|
| 1436 |
|
|
if ((code & 0x0f00) == 0x0400) /* For movd imm20. */
|
| 1437 |
|
|
bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
|
| 1438 |
|
|
else /* For addd imm20. */
|
| 1439 |
|
|
bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
|
| 1440 |
|
|
bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1);
|
| 1441 |
|
|
}
|
| 1442 |
|
|
else
|
| 1443 |
|
|
{
|
| 1444 |
|
|
if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */
|
| 1445 |
|
|
bfd_put_8 (abfd, 0x56, contents + irel->r_offset);
|
| 1446 |
|
|
else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */
|
| 1447 |
|
|
bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
|
| 1448 |
|
|
else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */
|
| 1449 |
|
|
bfd_put_8 (abfd, 0x58, contents + irel->r_offset);
|
| 1450 |
|
|
else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */
|
| 1451 |
|
|
bfd_put_8 (abfd, 0x5A, contents + irel->r_offset);
|
| 1452 |
|
|
else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */
|
| 1453 |
|
|
bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
|
| 1454 |
|
|
else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */
|
| 1455 |
|
|
bfd_put_8 (abfd, 0x30, contents + irel->r_offset);
|
| 1456 |
|
|
else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */
|
| 1457 |
|
|
bfd_put_8 (abfd, 0x2C, contents + irel->r_offset);
|
| 1458 |
|
|
else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */
|
| 1459 |
|
|
bfd_put_8 (abfd, 0x32, contents + irel->r_offset);
|
| 1460 |
|
|
else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */
|
| 1461 |
|
|
bfd_put_8 (abfd, 0x38, contents + irel->r_offset);
|
| 1462 |
|
|
else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */
|
| 1463 |
|
|
bfd_put_8 (abfd, 0x3A, contents + irel->r_offset);
|
| 1464 |
|
|
else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */
|
| 1465 |
|
|
bfd_put_8 (abfd, 0x50, contents + irel->r_offset);
|
| 1466 |
|
|
else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */
|
| 1467 |
|
|
bfd_put_8 (abfd, 0x52, contents + irel->r_offset);
|
| 1468 |
|
|
else
|
| 1469 |
|
|
continue;
|
| 1470 |
|
|
|
| 1471 |
|
|
bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1);
|
| 1472 |
|
|
}
|
| 1473 |
|
|
|
| 1474 |
|
|
/* Fix the relocation's type. */
|
| 1475 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1476 |
|
|
R_CR16_IMM4);
|
| 1477 |
|
|
|
| 1478 |
|
|
/* Delete two bytes of data. */
|
| 1479 |
|
|
if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
|
| 1480 |
|
|
irel->r_offset + 2, 2))
|
| 1481 |
|
|
goto error_return;
|
| 1482 |
|
|
|
| 1483 |
|
|
/* That will change things, so, we should relax again.
|
| 1484 |
|
|
Note that this is not required, and it may be slow. */
|
| 1485 |
|
|
*again = TRUE;
|
| 1486 |
|
|
}
|
| 1487 |
|
|
}
|
| 1488 |
|
|
}
|
| 1489 |
|
|
|
| 1490 |
|
|
if (isymbuf != NULL
|
| 1491 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1492 |
|
|
{
|
| 1493 |
|
|
if (! link_info->keep_memory)
|
| 1494 |
|
|
free (isymbuf);
|
| 1495 |
|
|
else
|
| 1496 |
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
| 1497 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1498 |
|
|
}
|
| 1499 |
|
|
|
| 1500 |
|
|
if (contents != NULL
|
| 1501 |
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
| 1502 |
|
|
{
|
| 1503 |
|
|
if (! link_info->keep_memory)
|
| 1504 |
|
|
free (contents);
|
| 1505 |
|
|
else
|
| 1506 |
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
| 1507 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1508 |
|
|
}
|
| 1509 |
|
|
|
| 1510 |
|
|
if (internal_relocs != NULL
|
| 1511 |
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
| 1512 |
|
|
free (internal_relocs);
|
| 1513 |
|
|
|
| 1514 |
|
|
return TRUE;
|
| 1515 |
|
|
|
| 1516 |
|
|
error_return:
|
| 1517 |
|
|
if (isymbuf != NULL
|
| 1518 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1519 |
|
|
free (isymbuf);
|
| 1520 |
|
|
if (contents != NULL
|
| 1521 |
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
| 1522 |
|
|
free (contents);
|
| 1523 |
|
|
if (internal_relocs != NULL
|
| 1524 |
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
| 1525 |
|
|
free (internal_relocs);
|
| 1526 |
|
|
|
| 1527 |
|
|
return FALSE;
|
| 1528 |
|
|
}
|
| 1529 |
|
|
|
| 1530 |
|
|
static asection *
|
| 1531 |
|
|
elf32_cr16_gc_mark_hook (asection *sec,
|
| 1532 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
| 1533 |
|
|
Elf_Internal_Rela *rel ATTRIBUTE_UNUSED,
|
| 1534 |
|
|
struct elf_link_hash_entry *h,
|
| 1535 |
|
|
Elf_Internal_Sym *sym)
|
| 1536 |
|
|
{
|
| 1537 |
|
|
if (h == NULL)
|
| 1538 |
|
|
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
| 1539 |
|
|
|
| 1540 |
|
|
switch (h->root.type)
|
| 1541 |
|
|
{
|
| 1542 |
|
|
case bfd_link_hash_defined:
|
| 1543 |
|
|
case bfd_link_hash_defweak:
|
| 1544 |
|
|
return h->root.u.def.section;
|
| 1545 |
|
|
|
| 1546 |
|
|
case bfd_link_hash_common:
|
| 1547 |
|
|
return h->root.u.c.p->section;
|
| 1548 |
|
|
|
| 1549 |
|
|
default:
|
| 1550 |
|
|
return NULL;
|
| 1551 |
|
|
}
|
| 1552 |
|
|
}
|
| 1553 |
|
|
|
| 1554 |
|
|
/* Update the got entry reference counts for the section being removed. */
|
| 1555 |
|
|
|
| 1556 |
|
|
static bfd_boolean
|
| 1557 |
|
|
elf32_cr16_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
|
| 1558 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
| 1559 |
|
|
asection *sec ATTRIBUTE_UNUSED,
|
| 1560 |
|
|
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
|
| 1561 |
|
|
{
|
| 1562 |
|
|
/* We don't support garbage collection of GOT and PLT relocs yet. */
|
| 1563 |
|
|
return TRUE;
|
| 1564 |
|
|
}
|
| 1565 |
|
|
|
| 1566 |
|
|
/* Definitions for setting CR16 target vector. */
|
| 1567 |
|
|
#define TARGET_LITTLE_SYM bfd_elf32_cr16_vec
|
| 1568 |
|
|
#define TARGET_LITTLE_NAME "elf32-cr16"
|
| 1569 |
|
|
#define ELF_ARCH bfd_arch_cr16
|
| 1570 |
|
|
#define ELF_MACHINE_CODE EM_CR16
|
| 1571 |
|
|
#define ELF_MAXPAGESIZE 0x1
|
| 1572 |
|
|
#define elf_symbol_leading_char '_'
|
| 1573 |
|
|
|
| 1574 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup
|
| 1575 |
|
|
#define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup
|
| 1576 |
|
|
#define elf_info_to_howto elf_cr16_info_to_howto
|
| 1577 |
|
|
#define elf_info_to_howto_rel 0
|
| 1578 |
|
|
#define elf_backend_relocate_section elf32_cr16_relocate_section
|
| 1579 |
|
|
#define bfd_elf32_bfd_relax_section elf32_cr16_relax_section
|
| 1580 |
|
|
#define bfd_elf32_bfd_get_relocated_section_contents \
|
| 1581 |
|
|
elf32_cr16_get_relocated_section_contents
|
| 1582 |
|
|
#define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook
|
| 1583 |
|
|
#define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook
|
| 1584 |
|
|
#define elf_backend_can_gc_sections 1
|
| 1585 |
|
|
#define elf_backend_rela_normal 1
|
| 1586 |
|
|
|
| 1587 |
|
|
#include "elf32-target.h"
|
