528 lines
16 KiB
C
528 lines
16 KiB
C
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/* Freescale XGATE-specific support for 32-bit ELF
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Copyright (C) 2010-2022 Free Software Foundation, Inc.
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Contributed by Sean Keys(skeys@ipdatasys.com)
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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, Inc., 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 "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/xgate.h"
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#include "opcode/xgate.h"
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#include "libiberty.h"
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/* Forward declarations. */
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static bfd_reloc_status_type xgate_elf_ignore_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static bfd_reloc_status_type xgate_elf_special_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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/* Use REL instead of RELA to save space */
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#define USE_REL 1
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static reloc_howto_type elf_xgate_howto_table[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_XGATE_NONE, /* type */
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0, /* rightshift */
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3, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XGATE_NONE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 8 bit absolute relocation. */
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HOWTO (R_XGATE_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XGATE_8", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 8 bit PC-rel relocation. */
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HOWTO (R_XGATE_PCREL_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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true, /* 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_XGATE_PCREL_8", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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true), /* pcrel_offset */
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/* A 16 bit absolute relocation. */
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HOWTO (R_XGATE_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 /*bitfield */, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XGATE_16", /* 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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/* A 32 bit absolute relocation. This one is never used for the
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code relocation. It's used by gas for -gstabs generation. */
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HOWTO (R_XGATE_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_XGATE_32", /* 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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/* A 16 bit PC-rel relocation. */
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HOWTO (R_XGATE_PCREL_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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true, /* 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_XGATE_PCREL_16", /* 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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true), /* pcrel_offset */
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/* GNU extension to record C++ vtable hierarchy. */
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HOWTO (R_XGATE_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_XGATE_GNU_VTINHERIT", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* GNU extension to record C++ vtable member usage. */
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HOWTO (R_XGATE_GNU_VTENTRY, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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"R_XGATE_GNU_VTENTRY", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 24 bit relocation. */
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HOWTO (R_XGATE_24, /* 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_XGATE_IMM8_LO", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16-bit low relocation. */
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HOWTO (R_XGATE_LO16, /* type */
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8, /* 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_XGATE_IMM8_HI", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A page relocation. */
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HOWTO (R_XGATE_GPAGE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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xgate_elf_special_reloc,/* special_function */
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"R_XGATE_GPAGE", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 9 bit absolute relocation. */
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HOWTO (R_XGATE_PCREL_9, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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9, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XGATE_PCREL_9", /* 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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true), /* pcrel_offset */
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/* A 8 bit absolute relocation (upper address). */
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HOWTO (R_XGATE_PCREL_10, /* type */
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8, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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true, /* 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_XGATE_PCREL_10", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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true), /* pcrel_offset */
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/* A 8 bit absolute relocation. */
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HOWTO (R_XGATE_IMM8_LO, /* 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_XGATE_IMM8_LO", /* 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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/* A 16 bit absolute relocation (upper address). */
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HOWTO (R_XGATE_IMM8_HI, /* type */
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8, /* 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_XGATE_IMM8_HI", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 3 bit absolute relocation. */
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HOWTO (R_XGATE_IMM3, /* type */
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8, /* 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_XGATE_IMM3", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 4 bit absolute relocation. */
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HOWTO (R_XGATE_IMM4, /* type */
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8, /* 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_XGATE_IMM4", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 5 bit absolute relocation. */
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HOWTO (R_XGATE_IMM5, /* type */
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8, /* 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_XGATE_IMM5", /* name */
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false, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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false), /* pcrel_offset */
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/* Mark beginning of a jump instruction (any form). */
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HOWTO (R_XGATE_RL_JUMP, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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xgate_elf_ignore_reloc, /* special_function */
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"R_XGATE_RL_JUMP", /* name */
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true, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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true), /* pcrel_offset */
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/* Mark beginning of Gcc relaxation group instruction. */
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HOWTO (R_XGATE_RL_GROUP, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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xgate_elf_ignore_reloc, /* special_function */
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"R_XGATE_RL_GROUP", /* name */
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true, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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true), /* pcrel_offset */
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};
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/* Map BFD reloc types to XGATE ELF reloc types. */
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struct xgate_reloc_map
|
||
|
|
{
|
||
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
||
|
|
unsigned char elf_reloc_val;
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct xgate_reloc_map xgate_reloc_map[] =
|
||
|
|
{
|
||
|
|
{BFD_RELOC_NONE, R_XGATE_NONE},
|
||
|
|
{BFD_RELOC_8, R_XGATE_8},
|
||
|
|
{BFD_RELOC_8_PCREL, R_XGATE_PCREL_8},
|
||
|
|
{BFD_RELOC_16_PCREL, R_XGATE_PCREL_16},
|
||
|
|
{BFD_RELOC_16, R_XGATE_16},
|
||
|
|
{BFD_RELOC_32, R_XGATE_32},
|
||
|
|
|
||
|
|
{BFD_RELOC_VTABLE_INHERIT, R_XGATE_GNU_VTINHERIT},
|
||
|
|
{BFD_RELOC_VTABLE_ENTRY, R_XGATE_GNU_VTENTRY},
|
||
|
|
|
||
|
|
{BFD_RELOC_XGATE_LO16, R_XGATE_LO16},
|
||
|
|
{BFD_RELOC_XGATE_GPAGE, R_XGATE_GPAGE},
|
||
|
|
{BFD_RELOC_XGATE_24, R_XGATE_24},
|
||
|
|
{BFD_RELOC_XGATE_PCREL_9, R_XGATE_PCREL_9},
|
||
|
|
{BFD_RELOC_XGATE_PCREL_10, R_XGATE_PCREL_10},
|
||
|
|
{BFD_RELOC_XGATE_IMM8_LO, R_XGATE_IMM8_LO},
|
||
|
|
{BFD_RELOC_XGATE_IMM8_HI, R_XGATE_IMM8_HI},
|
||
|
|
{BFD_RELOC_XGATE_IMM3, R_XGATE_IMM3},
|
||
|
|
{BFD_RELOC_XGATE_IMM4, R_XGATE_IMM4},
|
||
|
|
{BFD_RELOC_XGATE_IMM5, R_XGATE_IMM5},
|
||
|
|
|
||
|
|
{BFD_RELOC_XGATE_RL_JUMP, R_XGATE_RL_JUMP},
|
||
|
|
{BFD_RELOC_XGATE_RL_GROUP, R_XGATE_RL_GROUP},
|
||
|
|
};
|
||
|
|
|
||
|
|
static reloc_howto_type *
|
||
|
|
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
|
|
bfd_reloc_code_real_type code)
|
||
|
|
{
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE (xgate_reloc_map); i++)
|
||
|
|
if (xgate_reloc_map[i].bfd_reloc_val == code)
|
||
|
|
return &elf_xgate_howto_table[xgate_reloc_map[i].elf_reloc_val];
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static reloc_howto_type *
|
||
|
|
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
|
||
|
|
{
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE (elf_xgate_howto_table); i++)
|
||
|
|
if (elf_xgate_howto_table[i].name != NULL
|
||
|
|
&& strcasecmp (elf_xgate_howto_table[i].name, r_name) == 0)
|
||
|
|
return &elf_xgate_howto_table[i];
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set the howto pointer for an XGATE ELF reloc. */
|
||
|
|
|
||
|
|
static bool
|
||
|
|
xgate_info_to_howto_rel (bfd *abfd,
|
||
|
|
arelent *cache_ptr,
|
||
|
|
Elf_Internal_Rela *dst)
|
||
|
|
{
|
||
|
|
unsigned int r_type;
|
||
|
|
|
||
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
||
|
|
if (r_type >= (unsigned int) R_XGATE_max)
|
||
|
|
{
|
||
|
|
/* xgettext:c-format */
|
||
|
|
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
|
||
|
|
abfd, r_type);
|
||
|
|
bfd_set_error (bfd_error_bad_value);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
cache_ptr->howto = &elf_xgate_howto_table[r_type];
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Specific sections:
|
||
|
|
- The .page0 is a data section that is mapped in [0x0000..0x00FF].
|
||
|
|
Page0 accesses are faster on the M68HC12.
|
||
|
|
- The .vectors is the section that represents the interrupt
|
||
|
|
vectors.
|
||
|
|
- The .xgate section is starts in 0xE08800 or as xgate sees it 0x0800. */
|
||
|
|
static const struct bfd_elf_special_section elf32_xgate_special_sections[] =
|
||
|
|
{
|
||
|
|
{ STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
|
||
|
|
{ STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
|
||
|
|
{ STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
|
||
|
|
{ STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC },
|
||
|
|
/*{ STRING_COMMA_LEN (".xgate"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
|
||
|
|
TODO finish this implementation */
|
||
|
|
{ NULL, 0, 0, 0, 0 }
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Hook called when reading symbols. */
|
||
|
|
|
||
|
|
static void
|
||
|
|
elf32_xgate_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
|
||
|
|
asymbol *sym)
|
||
|
|
{
|
||
|
|
/* Mark xgate symbols. */
|
||
|
|
((elf_symbol_type *) sym)->internal_elf_sym.st_target_internal = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This function is used for relocs which are only used for relaxing,
|
||
|
|
which the linker should otherwise ignore. */
|
||
|
|
|
||
|
|
static bfd_reloc_status_type
|
||
|
|
xgate_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
||
|
|
arelent *reloc_entry,
|
||
|
|
asymbol *symbol ATTRIBUTE_UNUSED,
|
||
|
|
void *data ATTRIBUTE_UNUSED,
|
||
|
|
asection *input_section,
|
||
|
|
bfd *output_bfd,
|
||
|
|
char **error_message ATTRIBUTE_UNUSED)
|
||
|
|
{
|
||
|
|
if (output_bfd != NULL)
|
||
|
|
reloc_entry->address += input_section->output_offset;
|
||
|
|
return bfd_reloc_ok;
|
||
|
|
}
|
||
|
|
|
||
|
|
static bfd_reloc_status_type
|
||
|
|
xgate_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
||
|
|
arelent *reloc_entry ATTRIBUTE_UNUSED,
|
||
|
|
asymbol *symbol ATTRIBUTE_UNUSED,
|
||
|
|
void *data ATTRIBUTE_UNUSED,
|
||
|
|
asection *input_section ATTRIBUTE_UNUSED,
|
||
|
|
bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
|
|
char **error_message ATTRIBUTE_UNUSED)
|
||
|
|
{
|
||
|
|
abort ();
|
||
|
|
}
|
||
|
|
|
||
|
|
static bool
|
||
|
|
_bfd_xgate_elf_print_private_bfd_data (bfd *abfd, void *ptr)
|
||
|
|
{
|
||
|
|
FILE *file = (FILE *) ptr;
|
||
|
|
|
||
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
||
|
|
|
||
|
|
/* Print normal ELF private data. */
|
||
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
||
|
|
|
||
|
|
/* xgettext:c-format */
|
||
|
|
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
||
|
|
|
||
|
|
if (elf_elfheader (abfd)->e_flags & E_XGATE_I32)
|
||
|
|
fprintf (file, _("[abi=32-bit int, "));
|
||
|
|
else
|
||
|
|
fprintf (file, _("[abi=16-bit int, "));
|
||
|
|
|
||
|
|
if (elf_elfheader (abfd)->e_flags & E_XGATE_F64)
|
||
|
|
fprintf (file, _("64-bit double, "));
|
||
|
|
else
|
||
|
|
fprintf (file, _("32-bit double, "));
|
||
|
|
if (elf_elfheader (abfd)->e_flags & EF_XGATE_MACH)
|
||
|
|
fprintf (file, _("cpu=XGATE]"));
|
||
|
|
else
|
||
|
|
fprintf (file, _("error reading cpu type from elf private data"));
|
||
|
|
fputc ('\n', file);
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define ELF_ARCH bfd_arch_xgate
|
||
|
|
#define ELF_MACHINE_CODE EM_XGATE
|
||
|
|
|
||
|
|
#define ELF_MAXPAGESIZE 0x1000
|
||
|
|
|
||
|
|
#define TARGET_BIG_SYM xgate_elf32_vec
|
||
|
|
#define TARGET_BIG_NAME "elf32-xgate"
|
||
|
|
|
||
|
|
#define elf_info_to_howto_rel xgate_info_to_howto_rel
|
||
|
|
#define elf_backend_special_sections elf32_xgate_special_sections
|
||
|
|
#define elf_backend_symbol_processing elf32_xgate_backend_symbol_processing
|
||
|
|
#define bfd_elf32_bfd_print_private_bfd_data _bfd_xgate_elf_print_private_bfd_data
|
||
|
|
|
||
|
|
#include "elf32-target.h"
|