101 lines
3.7 KiB
C
101 lines
3.7 KiB
C
/* BFD support for the ARC processor
|
|
Copyright (C) 1994-2017 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, /* 32 bits in a word */ \
|
|
32, /* 32 bits in an address */ \
|
|
8, /* 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, \
|
|
}
|
|
|
|
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);
|
|
}
|