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julius |
/* Infineon XC16X-specific support for 16-bit ELF.
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Copyright 2006, 2007 Free Software Foundation, Inc.
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Contributed by KPIT Cummins Infosystems
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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
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Foundation, 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/xc16x.h"
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#include "elf/dwarf2.h"
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#include "libiberty.h"
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static reloc_howto_type xc16x_elf_howto_table [] =
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{
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/* This reloc does nothing. */
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HOWTO (R_XC16X_NONE, /* 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_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XC16X_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* An 8 bit absolute relocation. */
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HOWTO (R_XC16X_ABS_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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8, /* 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_XC16X_ABS_8", /* name */
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TRUE, /* partial_inplace */
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0x0000, /* src_mask */
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0x00ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 16 bit absolute relocation. */
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HOWTO (R_XC16X_ABS_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_XC16X_ABS_16", /* name */
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TRUE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_XC16X_ABS_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XC16X_ABS_32", /* name */
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TRUE, /* partial_inplace */
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0x00000000, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A PC relative 8 bit relocation. */
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HOWTO (R_XC16X_8_PCREL, /* 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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TRUE, /* pc_relative */
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8, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XC16X_8_PCREL", /* name */
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FALSE, /* partial_inplace */
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0x0000, /* src_mask */
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0x00ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* Relocation regarding page number. */
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HOWTO (R_XC16X_PAG, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XC16X_PAG", /* name */
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TRUE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* Relocation regarding page number. */
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HOWTO (R_XC16X_POF, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XC16X_POF", /* name */
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TRUE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* Relocation regarding segment number. */
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HOWTO (R_XC16X_SEG, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XC16X_SEG", /* name */
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TRUE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* Relocation regarding segment offset. */
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HOWTO (R_XC16X_SOF, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XC16X_SOF", /* name */
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TRUE, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE) /* pcrel_offset */
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};
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/* Map BFD reloc types to XC16X ELF reloc types. */
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struct xc16x_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned int xc16x_reloc_val;
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};
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static const struct xc16x_reloc_map xc16x_reloc_map [] =
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{
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{ BFD_RELOC_NONE, R_XC16X_NONE },
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{ BFD_RELOC_8, R_XC16X_ABS_8 },
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{ BFD_RELOC_16, R_XC16X_ABS_16 },
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{ BFD_RELOC_32, R_XC16X_ABS_32 },
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{ BFD_RELOC_8_PCREL, R_XC16X_8_PCREL },
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{ BFD_RELOC_XC16X_PAG, R_XC16X_PAG},
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{ BFD_RELOC_XC16X_POF, R_XC16X_POF},
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{ BFD_RELOC_XC16X_SEG, R_XC16X_SEG},
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{ BFD_RELOC_XC16X_SOF, R_XC16X_SOF},
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};
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/* This function is used to search for correct relocation type from
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howto structure. */
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static reloc_howto_type *
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xc16x_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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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 = ARRAY_SIZE (xc16x_reloc_map); --i;)
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if (xc16x_reloc_map [i].bfd_reloc_val == code)
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return & xc16x_elf_howto_table [xc16x_reloc_map[i].xc16x_reloc_val];
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return NULL;
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}
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static reloc_howto_type *
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xc16x_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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const char *r_name)
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (xc16x_elf_howto_table) / sizeof (xc16x_elf_howto_table[0]);
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i++)
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if (xc16x_elf_howto_table[i].name != NULL
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&& strcasecmp (xc16x_elf_howto_table[i].name, r_name) == 0)
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return &xc16x_elf_howto_table[i];
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return NULL;
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}
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/* For a particular operand this function is
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called to finalise the type of relocation. */
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static void
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elf32_xc16x_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
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Elf_Internal_Rela *elf_reloc)
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{
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unsigned int r;
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unsigned int i;
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r = ELF32_R_TYPE (elf_reloc->r_info);
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for (i = 0; i < ARRAY_SIZE (xc16x_elf_howto_table); i++)
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if (xc16x_elf_howto_table[i].type == r)
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{
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bfd_reloc->howto = &xc16x_elf_howto_table[i];
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return;
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}
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abort ();
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}
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static bfd_reloc_status_type
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elf32_xc16x_final_link_relocate (unsigned long r_type,
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bfd *input_bfd,
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bfd *output_bfd ATTRIBUTE_UNUSED,
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asection *input_section ATTRIBUTE_UNUSED,
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bfd_byte *contents,
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bfd_vma offset,
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bfd_vma value,
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bfd_vma addend,
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struct bfd_link_info *info ATTRIBUTE_UNUSED,
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asection *sym_sec ATTRIBUTE_UNUSED,
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int is_local ATTRIBUTE_UNUSED)
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{
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bfd_byte *hit_data = contents + offset;
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bfd_vma val1;
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switch (r_type)
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{
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case R_XC16X_NONE:
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return bfd_reloc_ok;
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case R_XC16X_ABS_16:
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value += addend;
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bfd_put_16 (input_bfd, value, hit_data);
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return bfd_reloc_ok;
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| 270 |
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| 271 |
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case R_XC16X_8_PCREL:
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bfd_put_8 (input_bfd, value, hit_data);
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return bfd_reloc_ok;
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| 274 |
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| 275 |
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/* Following case is to find page number from actual
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address for this divide value by 16k i.e. page size. */
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| 277 |
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case R_XC16X_PAG:
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value += addend;
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value /= 0x4000;
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| 281 |
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bfd_put_16 (input_bfd, value, hit_data);
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| 282 |
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return bfd_reloc_ok;
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| 283 |
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| 284 |
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/* Following case is to find page offset from actual address
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| 285 |
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for this take modulo of value by 16k i.e. page size. */
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| 286 |
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| 287 |
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case R_XC16X_POF:
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| 288 |
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value += addend;
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| 289 |
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value %= 0x4000;
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| 290 |
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bfd_put_16 (input_bfd, value, hit_data);
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| 291 |
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return bfd_reloc_ok;
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| 292 |
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| 293 |
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/* Following case is to find segment number from actual
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| 294 |
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address for this divide value by 64k i.e. segment size. */
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| 295 |
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| 296 |
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case R_XC16X_SEG:
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value += addend;
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value /= 0x10000;
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| 299 |
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bfd_put_16 (input_bfd, value, hit_data);
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return bfd_reloc_ok;
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| 301 |
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| 302 |
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/* Following case is to find segment offset from actual address
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for this take modulo of value by 64k i.e. segment size. */
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| 304 |
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| 305 |
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case R_XC16X_SOF:
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value += addend;
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value %= 0x10000;
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bfd_put_16 (input_bfd, value, hit_data);
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return bfd_reloc_ok;
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| 310 |
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case R_XC16X_ABS_32:
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if (!strstr (input_section->name,".debug"))
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{
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| 314 |
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value += addend;
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val1 = value;
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value %= 0x4000;
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val1 /= 0x4000;
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| 318 |
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val1 = val1 << 16;
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| 319 |
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value += val1;
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| 320 |
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bfd_put_32 (input_bfd, value, hit_data);
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}
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| 322 |
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else
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| 323 |
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{
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| 324 |
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value += addend;
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| 325 |
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bfd_put_32 (input_bfd, value, hit_data);
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| 326 |
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}
|
| 327 |
|
|
return bfd_reloc_ok;
|
| 328 |
|
|
|
| 329 |
|
|
default:
|
| 330 |
|
|
return bfd_reloc_notsupported;
|
| 331 |
|
|
}
|
| 332 |
|
|
}
|
| 333 |
|
|
|
| 334 |
|
|
static bfd_boolean
|
| 335 |
|
|
elf32_xc16x_relocate_section (bfd *output_bfd,
|
| 336 |
|
|
struct bfd_link_info *info,
|
| 337 |
|
|
bfd *input_bfd,
|
| 338 |
|
|
asection *input_section,
|
| 339 |
|
|
bfd_byte *contents,
|
| 340 |
|
|
Elf_Internal_Rela *relocs,
|
| 341 |
|
|
Elf_Internal_Sym *local_syms,
|
| 342 |
|
|
asection **local_sections)
|
| 343 |
|
|
{
|
| 344 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 345 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 346 |
|
|
Elf_Internal_Rela *rel, *relend;
|
| 347 |
|
|
|
| 348 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 349 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
| 350 |
|
|
|
| 351 |
|
|
rel = relocs;
|
| 352 |
|
|
relend = relocs + input_section->reloc_count;
|
| 353 |
|
|
for (; rel < relend; rel++)
|
| 354 |
|
|
{
|
| 355 |
|
|
unsigned int r_type;
|
| 356 |
|
|
unsigned long r_symndx;
|
| 357 |
|
|
Elf_Internal_Sym *sym;
|
| 358 |
|
|
asection *sec;
|
| 359 |
|
|
struct elf_link_hash_entry *h;
|
| 360 |
|
|
bfd_vma relocation;
|
| 361 |
|
|
bfd_reloc_status_type r;
|
| 362 |
|
|
|
| 363 |
|
|
/* This is a final link. */
|
| 364 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 365 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
| 366 |
|
|
h = NULL;
|
| 367 |
|
|
sym = NULL;
|
| 368 |
|
|
sec = NULL;
|
| 369 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 370 |
|
|
{
|
| 371 |
|
|
sym = local_syms + r_symndx;
|
| 372 |
|
|
sec = local_sections[r_symndx];
|
| 373 |
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
| 374 |
|
|
}
|
| 375 |
|
|
else
|
| 376 |
|
|
{
|
| 377 |
|
|
bfd_boolean unresolved_reloc, warned;
|
| 378 |
|
|
|
| 379 |
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
| 380 |
|
|
r_symndx, symtab_hdr, sym_hashes,
|
| 381 |
|
|
h, sec, relocation,
|
| 382 |
|
|
unresolved_reloc, warned);
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
if (sec != NULL && elf_discarded_section (sec))
|
| 386 |
|
|
{
|
| 387 |
|
|
/* For relocs against symbols from removed linkonce sections,
|
| 388 |
|
|
or sections discarded by a linker script, we just want the
|
| 389 |
|
|
section contents zeroed. Avoid any special processing. */
|
| 390 |
|
|
reloc_howto_type *howto;
|
| 391 |
|
|
howto = xc16x_reloc_type_lookup (input_bfd, r_type);
|
| 392 |
|
|
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
| 393 |
|
|
rel->r_info = 0;
|
| 394 |
|
|
rel->r_addend = 0;
|
| 395 |
|
|
continue;
|
| 396 |
|
|
}
|
| 397 |
|
|
|
| 398 |
|
|
if (info->relocatable)
|
| 399 |
|
|
continue;
|
| 400 |
|
|
|
| 401 |
|
|
r = elf32_xc16x_final_link_relocate (r_type, input_bfd, output_bfd,
|
| 402 |
|
|
input_section,
|
| 403 |
|
|
contents, rel->r_offset,
|
| 404 |
|
|
relocation, rel->r_addend,
|
| 405 |
|
|
info, sec, h == NULL);
|
| 406 |
|
|
}
|
| 407 |
|
|
|
| 408 |
|
|
return TRUE;
|
| 409 |
|
|
}
|
| 410 |
|
|
|
| 411 |
|
|
|
| 412 |
|
|
static void
|
| 413 |
|
|
elf32_xc16x_final_write_processing (bfd *abfd,
|
| 414 |
|
|
bfd_boolean linker ATTRIBUTE_UNUSED)
|
| 415 |
|
|
{
|
| 416 |
|
|
unsigned long val;
|
| 417 |
|
|
|
| 418 |
|
|
switch (bfd_get_mach (abfd))
|
| 419 |
|
|
{
|
| 420 |
|
|
default:
|
| 421 |
|
|
case bfd_mach_xc16x:
|
| 422 |
|
|
val = 0x1000;
|
| 423 |
|
|
break;
|
| 424 |
|
|
|
| 425 |
|
|
case bfd_mach_xc16xl:
|
| 426 |
|
|
val = 0x1001;
|
| 427 |
|
|
break;
|
| 428 |
|
|
|
| 429 |
|
|
case bfd_mach_xc16xs:
|
| 430 |
|
|
val = 0x1002;
|
| 431 |
|
|
break;
|
| 432 |
|
|
}
|
| 433 |
|
|
|
| 434 |
|
|
elf_elfheader (abfd)->e_flags |= val;
|
| 435 |
|
|
}
|
| 436 |
|
|
|
| 437 |
|
|
static unsigned long
|
| 438 |
|
|
elf32_xc16x_mach (flagword flags)
|
| 439 |
|
|
{
|
| 440 |
|
|
switch (flags)
|
| 441 |
|
|
{
|
| 442 |
|
|
case 0x1000:
|
| 443 |
|
|
default:
|
| 444 |
|
|
return bfd_mach_xc16x;
|
| 445 |
|
|
|
| 446 |
|
|
case 0x1001:
|
| 447 |
|
|
return bfd_mach_xc16xl;
|
| 448 |
|
|
|
| 449 |
|
|
case 0x1002:
|
| 450 |
|
|
return bfd_mach_xc16xs;
|
| 451 |
|
|
}
|
| 452 |
|
|
}
|
| 453 |
|
|
|
| 454 |
|
|
|
| 455 |
|
|
static bfd_boolean
|
| 456 |
|
|
elf32_xc16x_object_p (bfd *abfd)
|
| 457 |
|
|
{
|
| 458 |
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_xc16x,
|
| 459 |
|
|
elf32_xc16x_mach (elf_elfheader (abfd)->e_flags));
|
| 460 |
|
|
return TRUE;
|
| 461 |
|
|
}
|
| 462 |
|
|
|
| 463 |
|
|
|
| 464 |
|
|
#define ELF_ARCH bfd_arch_xc16x
|
| 465 |
|
|
#define ELF_MACHINE_CODE EM_XC16X
|
| 466 |
|
|
#define ELF_MAXPAGESIZE 0x100
|
| 467 |
|
|
|
| 468 |
|
|
#define TARGET_LITTLE_SYM bfd_elf32_xc16x_vec
|
| 469 |
|
|
#define TARGET_LITTLE_NAME "elf32-xc16x"
|
| 470 |
|
|
#define elf_backend_final_write_processing elf32_xc16x_final_write_processing
|
| 471 |
|
|
#define elf_backend_object_p elf32_xc16x_object_p
|
| 472 |
|
|
#define elf_backend_can_gc_sections 1
|
| 473 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup xc16x_reloc_type_lookup
|
| 474 |
|
|
#define bfd_elf32_bfd_reloc_name_lookup xc16x_reloc_name_lookup
|
| 475 |
|
|
#define elf_info_to_howto elf32_xc16x_info_to_howto
|
| 476 |
|
|
#define elf_info_to_howto_rel elf32_xc16x_info_to_howto
|
| 477 |
|
|
#define elf_backend_relocate_section elf32_xc16x_relocate_section
|
| 478 |
|
|
#define elf_backend_rela_normal 1
|
| 479 |
|
|
|
| 480 |
|
|
#include "elf32-target.h"
|
