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- /* BFD support for the ARC processor
- Copyright (C) 1994-2022 Free Software Foundation, Inc.
- Contributed by Doug Evans (dje@cygnus.com).
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- #include "sysdep.h"
- #include "bfd.h"
- #include "libbfd.h"
- static const bfd_arch_info_type *
- arc_compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b);
- #define ARC(mach, print_name, default_p, next) \
- { \
- 32, /* Bits in a word. */ \
- 32, /* Bits in an address. */ \
- 8, /* Bits in a byte. */ \
- bfd_arch_arc, \
- mach, \
- "arc", \
- print_name, \
- 4, /* Section alignment power. */ \
- default_p, \
- arc_compatible, \
- bfd_default_scan, \
- bfd_arch_default_fill, \
- next, \
- 0 /* Maximum offset of a reloc from the start of an insn. */ \
- }
- static const bfd_arch_info_type arch_info_struct[] =
- {
- ARC (bfd_mach_arc_arc600, "A6" , false, &arch_info_struct[1]),
- ARC (bfd_mach_arc_arc601, "ARC601", false, &arch_info_struct[2]),
- ARC (bfd_mach_arc_arc700, "ARC700", false, &arch_info_struct[3]),
- ARC (bfd_mach_arc_arc700, "A7", false, &arch_info_struct[4]),
- ARC (bfd_mach_arc_arcv2, "ARCv2", false, &arch_info_struct[5]),
- ARC (bfd_mach_arc_arcv2, "EM", false, &arch_info_struct[6]),
- ARC (bfd_mach_arc_arcv2, "HS", false, NULL),
- };
- const bfd_arch_info_type bfd_arc_arch =
- ARC (bfd_mach_arc_arc600, "ARC600", true, &arch_info_struct[0]);
- /* ARC-specific "compatible" function. The general rule is that if A and B are
- compatible, then this function should return architecture that is more
- "feature-rich", that is, can run both A and B. ARCv2, EM and HS all has
- same mach number, so bfd_default_compatible assumes they are the same, and
- returns an A. That causes issues with GDB, because GDB assumes that if
- machines are compatible, then "compatible ()" always returns same machine
- regardless of argument order. As a result GDB gets confused because, for
- example, compatible (ARCv2, EM) returns ARCv2, but compatible (EM, ARCv2)
- returns EM, hence GDB is not sure if they are compatible and prints a
- warning. */
- static const bfd_arch_info_type *
- arc_compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b)
- {
- const bfd_arch_info_type * const em = &arch_info_struct[5];
- const bfd_arch_info_type * const hs = &arch_info_struct[6];
- /* Trivial case where a and b is the same instance. Some callers already
- check this condition but some do not and get an invalid result. */
- if (a == b)
- return a;
- /* If a & b are for different architecture we can do nothing. */
- if (a->arch != b->arch)
- return NULL;
- if (a->bits_per_word != b->bits_per_word)
- return NULL;
- /* ARCv2|EM and EM. */
- if ((a->mach == bfd_mach_arc_arcv2 && b == em)
- || (b->mach == bfd_mach_arc_arcv2 && a == em))
- return em;
- /* ARCv2|HS and HS. */
- if ((a->mach == bfd_mach_arc_arcv2 && b == hs)
- || (b->mach == bfd_mach_arc_arcv2 && a == hs))
- return hs;
- return bfd_default_compatible (a, b);
- }
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