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https://sourceware.org/git/binutils-gdb.git
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e6b6fad2fe
This extends the commit 4581a1c7d3 fix to more targets, which
hardens BFD a little. I think the real underlying problem was the
bfd_canonicalize_reloc call in load_specific_debug_section which
passed a NULL for "symbols". Fix that too.
PR 22509
bfd/
* aoutx.h (swap_ext_reloc_out): Gracefully handle NULL symbols.
* i386lynx.c (swap_ext_reloc_out): Likewise.
* pdp11.c (pdp11_aout_swap_reloc_out): Likewise.
* coff-tic30.c (reloc_processing): Likewise.
* coff-tic4x.c (tic4x_reloc_processing): Likewise.
* coff-tic54x.c (tic54x_reloc_processing): Likewise.
* coff-z80.c (reloc_processing): Likewise.
* coff-z8k.c (reloc_processing): Likewise.
* ecoff.c (ecoff_slurp_reloc_table): Likewise.
* som.c (som_set_reloc_info): Likewise.
binutils/
* objdump.c (load_specific_debug_section): Pass syms to
bfd_canonicalize_reloc.
491 lines
14 KiB
C
491 lines
14 KiB
C
/* BFD back-end for Zilog Z80 COFF binaries.
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Copyright (C) 2005-2022 Free Software Foundation, Inc.
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Contributed by Arnold Metselaar <arnold_m@operamail.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 "libbfd.h"
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#include "bfdlink.h"
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#include "coff/z80.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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#include "libiberty.h"
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
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typedef const struct {
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bfd_reloc_code_real_type r_type;
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reloc_howto_type howto;
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} bfd_howto_type;
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#define BFD_EMPTY_HOWTO(rt,x) {rt, EMPTY_HOWTO(x)}
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#define BFD_HOWTO(rt,a,b,c,d,e,f,g,h,i,j,k,l,m) {rt, HOWTO(a,b,c,d,e,f,g,h,i,j,k,l,m)}
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static bfd_howto_type howto_table[] =
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{
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BFD_EMPTY_HOWTO (BFD_RELOC_NONE, 0),
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BFD_HOWTO (BFD_RELOC_32,
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R_IMM32, /* type */
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0, /* rightshift */
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4, /* 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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0, /* special_function */
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"r_imm32", /* 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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BFD_HOWTO (BFD_RELOC_24,
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R_IMM24, /* type */
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0, /* rightshift */
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3, /* size */
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24, /* 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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0, /* special_function */
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"r_imm24", /* name */
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false, /* partial_inplace */
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0x00ffffff, /* src_mask */
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0x00ffffff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_16,
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R_IMM16, /* type */
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0, /* rightshift */
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2, /* 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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0, /* special_function */
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"r_imm16", /* name */
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false, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_8,
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R_IMM8, /* type */
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0, /* rightshift */
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1, /* 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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0, /* special_function */
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"r_imm8", /* name */
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false, /* partial_inplace */
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0x000000ff, /* src_mask */
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0x000000ff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_8_PCREL,
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R_JR, /* type */
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0, /* rightshift */
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1, /* size */
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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_signed, /* complain_on_overflow */
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0, /* special_function */
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"r_jr", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xFF, /* dst_mask */
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true), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_Z80_DISP8,
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R_OFF8, /* type */
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0, /* rightshift */
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1, /* 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_signed, /* complain_on_overflow */
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0, /* special_function */
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"r_off8", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_Z80_BYTE0,
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R_BYTE0, /* type */
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0, /* rightshift */
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1, /* 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_dont, /* complain_on_overflow */
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0, /* special_function */
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"r_byte0", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_Z80_BYTE1,
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R_BYTE1, /* type */
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8, /* rightshift */
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1, /* 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_dont, /* complain_on_overflow */
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0, /* special_function */
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"r_byte1", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_Z80_BYTE2,
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R_BYTE2, /* type */
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16, /* rightshift */
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1, /* 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_dont, /* complain_on_overflow */
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0, /* special_function */
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"r_byte2", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_Z80_BYTE3,
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R_BYTE3, /* type */
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24, /* rightshift */
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1, /* 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_dont, /* complain_on_overflow */
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0, /* special_function */
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"r_byte3", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_Z80_WORD0,
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R_WORD0, /* type */
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0, /* rightshift */
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2, /* 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_dont, /* complain_on_overflow */
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0, /* special_function */
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"r_word0", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_Z80_WORD1,
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R_WORD1, /* type */
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16, /* rightshift */
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2, /* 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_dont, /* complain_on_overflow */
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0, /* special_function */
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"r_word1", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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BFD_HOWTO (BFD_RELOC_Z80_16_BE,
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R_IMM16BE, /* type */
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0, /* rightshift */
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2, /* 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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0, /* special_function */
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"r_imm16be", /* name */
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false, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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false), /* pcrel_offset */
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};
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#define NUM_HOWTOS ARRAY_SIZE (howto_table)
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#define BADMAG(x) Z80BADMAG(x)
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#define Z80 1 /* Customize coffcode.h. */
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#define __A_MAGIC_SET__
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/* Code to swap in the reloc. */
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#define SWAP_IN_RELOC_OFFSET H_GET_32
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#define SWAP_OUT_RELOC_OFFSET H_PUT_32
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#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
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dst->r_stuff[0] = 'S'; \
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dst->r_stuff[1] = 'C';
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/* Code to turn a r_type into a howto ptr, uses the above howto table. */
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static void
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rtype2howto (arelent *internal, struct internal_reloc *dst)
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{
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unsigned i;
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for (i = 0; i < NUM_HOWTOS; i++)
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{
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if (howto_table[i].howto.type == dst->r_type)
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{
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internal->howto = &howto_table[i].howto;
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return;
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}
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}
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internal->howto = NULL;
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}
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#define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
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static reloc_howto_type *
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coff_z80_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 i;
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for (i = 0; i < NUM_HOWTOS; i++)
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if (howto_table[i].r_type == code)
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return &howto_table[i].howto;
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BFD_FAIL ();
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return NULL;
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}
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static reloc_howto_type *
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coff_z80_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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const char *r_name)
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{
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unsigned i;
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for (i = 0; i < NUM_HOWTOS; i++)
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if (strcasecmp(howto_table[i].howto.name, r_name) == 0)
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return &howto_table[i].howto;
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return NULL;
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}
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/* Perform any necessary magic to the addend in a reloc entry. */
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#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
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cache_ptr->addend = ext_reloc.r_offset;
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#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
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reloc_processing(relent, reloc, symbols, abfd, section)
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static void
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reloc_processing (arelent *relent,
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struct internal_reloc *reloc,
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asymbol **symbols,
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bfd *abfd,
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asection *section)
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{
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relent->address = reloc->r_vaddr;
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rtype2howto (relent, reloc);
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if (reloc->r_symndx == -1 || symbols == NULL)
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relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
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else if (reloc->r_symndx >= 0 && reloc->r_symndx < obj_conv_table_size (abfd))
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relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
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else
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{
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_bfd_error_handler
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/* xgettext:c-format */
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(_("%pB: warning: illegal symbol index %ld in relocs"),
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abfd, reloc->r_symndx);
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relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
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}
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relent->addend = reloc->r_offset;
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relent->address -= section->vma;
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}
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static void
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extra_case (bfd *in_abfd,
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struct bfd_link_info *link_info,
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struct bfd_link_order *link_order,
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arelent *reloc,
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bfd_byte *data,
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unsigned int *src_ptr,
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unsigned int *dst_ptr)
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{
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asection * input_section = link_order->u.indirect.section;
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int val = bfd_coff_reloc16_get_value (reloc, link_info, input_section);
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switch (reloc->howto->type)
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{
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case R_OFF8:
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if (reloc->howto->partial_inplace)
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val += (signed char)(bfd_get_8 ( in_abfd, data+*src_ptr)
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& reloc->howto->src_mask);
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if (val>127 || val<-128) /* Test for overflow. */
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(*link_info->callbacks->reloc_overflow)
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(link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr),
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reloc->howto->name, reloc->addend, input_section->owner,
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input_section, reloc->address);
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bfd_put_8 (in_abfd, val, data + *dst_ptr);
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(*dst_ptr) += 1;
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(*src_ptr) += 1;
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break;
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case R_BYTE3:
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bfd_put_8 (in_abfd, val >> 24, data + *dst_ptr);
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(*dst_ptr) += 1;
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(*src_ptr) += 1;
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break;
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case R_BYTE2:
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bfd_put_8 (in_abfd, val >> 16, data + *dst_ptr);
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(*dst_ptr) += 1;
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(*src_ptr) += 1;
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break;
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case R_BYTE1:
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bfd_put_8 (in_abfd, val >> 8, data + *dst_ptr);
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(*dst_ptr) += 1;
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(*src_ptr) += 1;
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break;
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case R_IMM8:
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if (reloc->howto->partial_inplace)
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val += bfd_get_8 ( in_abfd, data+*src_ptr) & reloc->howto->src_mask;
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/* Fall through. */
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case R_BYTE0:
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bfd_put_8 (in_abfd, val, data + *dst_ptr);
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(*dst_ptr) += 1;
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(*src_ptr) += 1;
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break;
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case R_WORD1:
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bfd_put_16 (in_abfd, val >> 16, data + *dst_ptr);
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(*dst_ptr) += 2;
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(*src_ptr) += 2;
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break;
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case R_IMM16:
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if (reloc->howto->partial_inplace)
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val += bfd_get_16 ( in_abfd, data+*src_ptr) & reloc->howto->src_mask;
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/* Fall through. */
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case R_WORD0:
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bfd_put_16 (in_abfd, val, data + *dst_ptr);
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(*dst_ptr) += 2;
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(*src_ptr) += 2;
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break;
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case R_IMM24:
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if (reloc->howto->partial_inplace)
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val += (bfd_get_24 (in_abfd, data + *src_ptr)
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& reloc->howto->src_mask);
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bfd_put_24 (in_abfd, val, data + *dst_ptr);
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(*dst_ptr) += 3;
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(*src_ptr) += 3;
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break;
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case R_IMM32:
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if (reloc->howto->partial_inplace)
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val += bfd_get_32 ( in_abfd, data+*src_ptr) & reloc->howto->src_mask;
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bfd_put_32 (in_abfd, val, data + *dst_ptr);
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(*dst_ptr) += 4;
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(*src_ptr) += 4;
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break;
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case R_JR:
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{
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if (reloc->howto->partial_inplace)
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val += (signed char)(bfd_get_8 ( in_abfd, data+*src_ptr)
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& reloc->howto->src_mask);
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bfd_vma dot = (*dst_ptr
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+ input_section->output_offset
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+ input_section->output_section->vma);
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int gap = val - dot;
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if (gap >= 128 || gap < -128)
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(*link_info->callbacks->reloc_overflow)
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(link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr),
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reloc->howto->name, reloc->addend, input_section->owner,
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input_section, reloc->address);
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bfd_put_8 (in_abfd, gap, data + *dst_ptr);
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(*dst_ptr)++;
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(*src_ptr)++;
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break;
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}
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case R_IMM16BE:
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if (reloc->howto->partial_inplace)
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val += (bfd_get_8 ( in_abfd, data+*src_ptr+0) * 0x100 +
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bfd_get_8 ( in_abfd, data+*src_ptr+1)) & reloc->howto->src_mask;
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bfd_put_8 (in_abfd, val >> 8, data + *dst_ptr+0);
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bfd_put_8 (in_abfd, val, data + *dst_ptr+1);
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(*dst_ptr) += 2;
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(*src_ptr) += 2;
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break;
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default:
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abort ();
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}
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}
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static bool
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z80_is_local_label_name (bfd * abfd ATTRIBUTE_UNUSED,
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const char * name)
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{
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return (name[0] == '.' && name[1] == 'L') ||
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_bfd_coff_is_local_label_name (abfd, name);
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}
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#define coff_bfd_is_local_label_name z80_is_local_label_name
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#define coff_reloc16_extra_cases extra_case
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#define coff_bfd_reloc_type_lookup coff_z80_reloc_type_lookup
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#define coff_bfd_reloc_name_lookup coff_z80_reloc_name_lookup
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#ifndef bfd_pe_print_pdata
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#define bfd_pe_print_pdata NULL
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#endif
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#include "coffcode.h"
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#undef coff_bfd_get_relocated_section_contents
|
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#define coff_bfd_get_relocated_section_contents \
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bfd_coff_reloc16_get_relocated_section_contents
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#undef coff_bfd_relax_section
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#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
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CREATE_LITTLE_COFF_TARGET_VEC (z80_coff_vec, "coff-z80", 0,
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SEC_CODE | SEC_DATA, '\0', NULL,
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COFF_SWAP_TABLE)
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|