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102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/* BFD support for the ARC processor
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Copyright (C) 1994-2020 Free Software Foundation, Inc.
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Contributed by Doug Evans (dje@cygnus.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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static const bfd_arch_info_type *
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arc_compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b);
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#define ARC(mach, print_name, default_p, next) \
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{ \
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32, /* Bits in a word. */ \
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32, /* Bits in an address. */ \
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8, /* Bits in a byte. */ \
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bfd_arch_arc, \
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mach, \
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"arc", \
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print_name, \
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4, /* Section alignment power. */ \
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default_p, \
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arc_compatible, \
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bfd_default_scan, \
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bfd_arch_default_fill, \
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next, \
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0 /* Maximum offset of a reloc from the start of an insn. */ \
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}
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static const bfd_arch_info_type arch_info_struct[] =
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{
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ARC (bfd_mach_arc_arc600, "A6" , FALSE, &arch_info_struct[1]),
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ARC (bfd_mach_arc_arc601, "ARC601", FALSE, &arch_info_struct[2]),
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ARC (bfd_mach_arc_arc700, "ARC700", FALSE, &arch_info_struct[3]),
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ARC (bfd_mach_arc_arc700, "A7", FALSE, &arch_info_struct[4]),
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ARC (bfd_mach_arc_arcv2, "ARCv2", FALSE, &arch_info_struct[5]),
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ARC (bfd_mach_arc_arcv2, "EM", FALSE, &arch_info_struct[6]),
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ARC (bfd_mach_arc_arcv2, "HS", FALSE, NULL),
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};
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const bfd_arch_info_type bfd_arc_arch =
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ARC (bfd_mach_arc_arc600, "ARC600", TRUE, &arch_info_struct[0]);
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/* ARC-specific "compatible" function. The general rule is that if A and B are
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compatible, then this function should return architecture that is more
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"feature-rich", that is, can run both A and B. ARCv2, EM and HS all has
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same mach number, so bfd_default_compatible assumes they are the same, and
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returns an A. That causes issues with GDB, because GDB assumes that if
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machines are compatible, then "compatible ()" always returns same machine
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regardless of argument order. As a result GDB gets confused because, for
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example, compatible (ARCv2, EM) returns ARCv2, but compatible (EM, ARCv2)
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returns EM, hence GDB is not sure if they are compatible and prints a
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warning. */
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static const bfd_arch_info_type *
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arc_compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b)
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{
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const bfd_arch_info_type * const em = &arch_info_struct[5];
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const bfd_arch_info_type * const hs = &arch_info_struct[6];
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/* Trivial case where a and b is the same instance. Some callers already
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check this condition but some do not and get an invalid result. */
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if (a == b)
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return a;
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/* If a & b are for different architecture we can do nothing. */
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if (a->arch != b->arch)
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return NULL;
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if (a->bits_per_word != b->bits_per_word)
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return NULL;
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/* ARCv2|EM and EM. */
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if ((a->mach == bfd_mach_arc_arcv2 && b == em)
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|| (b->mach == bfd_mach_arc_arcv2 && a == em))
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return em;
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/* ARCv2|HS and HS. */
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if ((a->mach == bfd_mach_arc_arcv2 && b == hs)
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|| (b->mach == bfd_mach_arc_arcv2 && a == hs))
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return hs;
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return bfd_default_compatible (a, b);
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}
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