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jeremybenn |
/* BFD library support routines for architectures.
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Copyright 1990, 1991, 1992, 1993, 1994, 1997, 1998, 2000, 2001, 2002,
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2003, 2004, 2006, 2007 Free Software Foundation, Inc.
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Hacked by Steve Chamberlain of Cygnus Support.
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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 "opcode/m68k.h"
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static const bfd_arch_info_type *
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bfd_m68k_compatible (const bfd_arch_info_type *a,
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const bfd_arch_info_type *b);
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#define N(name, print,d,next) \
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{ 32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_m68k_compatible,bfd_default_scan, next, }
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static const bfd_arch_info_type arch_info_struct[] =
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{
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N(bfd_mach_m68000, "m68k:68000", FALSE, &arch_info_struct[1]),
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N(bfd_mach_m68008, "m68k:68008", FALSE, &arch_info_struct[2]),
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N(bfd_mach_m68010, "m68k:68010", FALSE, &arch_info_struct[3]),
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N(bfd_mach_m68020, "m68k:68020", FALSE, &arch_info_struct[4]),
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N(bfd_mach_m68030, "m68k:68030", FALSE, &arch_info_struct[5]),
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N(bfd_mach_m68040, "m68k:68040", FALSE, &arch_info_struct[6]),
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N(bfd_mach_m68060, "m68k:68060", FALSE, &arch_info_struct[7]),
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N(bfd_mach_cpu32, "m68k:cpu32", FALSE, &arch_info_struct[8]),
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N(bfd_mach_fido, "m68k:fido", FALSE, &arch_info_struct[9]),
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/* Various combinations of CF architecture features */
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N(bfd_mach_mcf_isa_a_nodiv, "m68k:isa-a:nodiv",
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FALSE, &arch_info_struct[10]),
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N(bfd_mach_mcf_isa_a, "m68k:isa-a",
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FALSE, &arch_info_struct[11]),
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N(bfd_mach_mcf_isa_a_mac, "m68k:isa-a:mac",
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FALSE, &arch_info_struct[12]),
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N(bfd_mach_mcf_isa_a_emac, "m68k:isa-a:emac",
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FALSE, &arch_info_struct[13]),
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N(bfd_mach_mcf_isa_aplus, "m68k:isa-aplus",
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FALSE, &arch_info_struct[14]),
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N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-aplus:mac",
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FALSE, &arch_info_struct[15]),
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N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-aplus:emac",
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FALSE, &arch_info_struct[16]),
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N(bfd_mach_mcf_isa_b_nousp, "m68k:isa-b:nousp",
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FALSE, &arch_info_struct[17]),
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N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:isa-b:nousp:mac",
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FALSE, &arch_info_struct[18]),
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N(bfd_mach_mcf_isa_b_nousp_emac, "m68k:isa-b:nousp:emac",
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FALSE, &arch_info_struct[19]),
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N(bfd_mach_mcf_isa_b, "m68k:isa-b",
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FALSE, &arch_info_struct[20]),
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N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac",
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FALSE, &arch_info_struct[21]),
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N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac",
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FALSE, &arch_info_struct[22]),
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N(bfd_mach_mcf_isa_b_float, "m68k:isa-b:float",
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FALSE, &arch_info_struct[23]),
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N(bfd_mach_mcf_isa_b_float_mac, "m68k:isa-b:float:mac",
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FALSE, &arch_info_struct[24]),
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N(bfd_mach_mcf_isa_b_float_emac, "m68k:isa-b:float:emac",
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FALSE, &arch_info_struct[25]),
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N(bfd_mach_mcf_isa_c, "m68k:isa-c",
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FALSE, &arch_info_struct[26]),
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N(bfd_mach_mcf_isa_c_mac, "m68k:isa-c:mac",
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FALSE, &arch_info_struct[27]),
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N(bfd_mach_mcf_isa_c_emac, "m68k:isa-c:emac",
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FALSE, &arch_info_struct[28]),
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N(bfd_mach_mcf_isa_c_nodiv, "m68k:isa-c:nodiv",
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FALSE, &arch_info_struct[29]),
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N(bfd_mach_mcf_isa_c_nodiv_mac, "m68k:isa-c:nodiv:mac",
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FALSE, &arch_info_struct[30]),
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N(bfd_mach_mcf_isa_c_nodiv_emac, "m68k:isa-c:nodiv:emac",
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FALSE, &arch_info_struct[31]),
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/* Legacy names for CF architectures */
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N(bfd_mach_mcf_isa_a_nodiv, "m68k:5200", FALSE, &arch_info_struct[32]),
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N(bfd_mach_mcf_isa_a_mac,"m68k:5206e", FALSE, &arch_info_struct[33]),
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N(bfd_mach_mcf_isa_a_mac, "m68k:5307", FALSE, &arch_info_struct[34]),
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N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:5407", FALSE, &arch_info_struct[35]),
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N(bfd_mach_mcf_isa_aplus_emac, "m68k:528x", FALSE, &arch_info_struct[36]),
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N(bfd_mach_mcf_isa_aplus_emac, "m68k:521x", FALSE, &arch_info_struct[37]),
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N(bfd_mach_mcf_isa_a_emac, "m68k:5249", FALSE, &arch_info_struct[38]),
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N(bfd_mach_mcf_isa_b_float_emac, "m68k:547x",
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FALSE, &arch_info_struct[39]),
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N(bfd_mach_mcf_isa_b_float_emac, "m68k:548x",
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FALSE, &arch_info_struct[40]),
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N(bfd_mach_mcf_isa_b_float_emac, "m68k:cfv4e", FALSE, 0),
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};
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const bfd_arch_info_type bfd_m68k_arch =
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N(0, "m68k", TRUE, &arch_info_struct[0]);
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/* Table indexed by bfd_mach_arch number indicating which
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architectural features are supported. */
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static const unsigned m68k_arch_features[] =
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{
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0,
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m68000|m68881|m68851,
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m68000|m68881|m68851,
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m68010|m68881|m68851,
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m68020|m68881|m68851,
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m68030|m68881|m68851,
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m68040|m68881|m68851,
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m68060|m68881|m68851,
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cpu32|m68881,
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fido_a|m68881,
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mcfisa_a,
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mcfisa_a|mcfhwdiv,
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mcfisa_a|mcfhwdiv|mcfmac,
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mcfisa_a|mcfhwdiv|mcfemac,
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mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp,
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mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac,
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mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac,
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mcfisa_a|mcfhwdiv|mcfisa_b,
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mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac,
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mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac,
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mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp,
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mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfmac,
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mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfemac,
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mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat,
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mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac,
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mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac,
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mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp,
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mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfmac,
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mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfemac,
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mcfisa_a|mcfisa_c|mcfusp,
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mcfisa_a|mcfisa_c|mcfusp|mcfmac,
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mcfisa_a|mcfisa_c|mcfusp|mcfemac,
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};
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/* Return the count of bits set in MASK */
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static unsigned
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bit_count (unsigned mask)
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{
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unsigned ix;
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for (ix = 0; mask; ix++)
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/* Clear the LSB set */
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mask ^= mask & -mask;
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return ix;
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}
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/* Return the architectural features supported by MACH */
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unsigned
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bfd_m68k_mach_to_features (int mach)
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{
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if ((unsigned)mach
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>= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]))
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mach = 0;
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return m68k_arch_features[mach];
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}
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/* Return the bfd machine that most closely represents the
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architectural features. We find the machine with the smallest
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number of additional features. If there is no such machine, we
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find the one with the smallest number of missing features. */
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int bfd_m68k_features_to_mach (unsigned features)
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{
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int superset = 0, subset = 0;
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unsigned extra = 99, missing = 99;
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unsigned ix;
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for (ix = 0;
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ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]);
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ix++)
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{
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unsigned this_extra, this_missing;
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if (m68k_arch_features[ix] == features)
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return ix;
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this_extra = bit_count (m68k_arch_features[ix] & ~features);
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if (this_extra < extra)
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{
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extra = this_extra;
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superset = ix;
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}
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this_missing = bit_count (features & ~m68k_arch_features[ix]);
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if (this_missing < missing)
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{
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missing = this_missing;
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superset = ix;
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}
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}
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return superset ? superset : subset;
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}
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static const bfd_arch_info_type *
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bfd_m68k_compatible (const bfd_arch_info_type *a,
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const bfd_arch_info_type *b)
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{
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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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if (!a->mach)
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return b;
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if (!b->mach)
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return a;
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if (a->mach <= bfd_mach_m68060 && b->mach <= bfd_mach_m68060)
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/* Merge m68k machine. */
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return a->mach > b->mach ? a : b;
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else if (a->mach >= bfd_mach_cpu32 && b->mach >= bfd_mach_cpu32)
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{
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/* Merge the machine features. */
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unsigned features = (bfd_m68k_mach_to_features (a->mach)
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| bfd_m68k_mach_to_features (b->mach));
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/* CPU32 and Coldfire are incompatible. */
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if ((~features & (cpu32 | mcfisa_a)) == 0)
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return NULL;
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| 236 |
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/* Fido and Coldfire are incompatible. */
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if ((~features & (fido_a | mcfisa_a)) == 0)
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return NULL;
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| 240 |
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/* ISA A+ and ISA B are incompatible. */
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if ((~features & (mcfisa_aa | mcfisa_b)) == 0)
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return NULL;
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| 244 |
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/* ISA B and ISA C are incompatible. */
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if ((~features & (mcfisa_b | mcfisa_c)) == 0)
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return NULL;
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| 248 |
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/* MAC and EMAC code cannot be merged. */
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if ((~features & (mcfmac | mcfemac)) == 0)
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return NULL;
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| 251 |
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| 252 |
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/* CPU32 is compatible with Fido except that Fido does not
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support tbl instructions. Warn when the user wants to mix
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the two. */
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if ((a->mach == bfd_mach_cpu32 && b->mach == bfd_mach_fido)
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|| (a->mach == bfd_mach_fido && b->mach == bfd_mach_cpu32))
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{
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| 258 |
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static int cpu32_fido_mix_warning;
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| 259 |
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if (!cpu32_fido_mix_warning)
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{
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cpu32_fido_mix_warning = 1;
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(*_bfd_error_handler) ("warning: linking CPU32 objects with fido objects");
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}
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return bfd_lookup_arch (a->arch,
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bfd_m68k_features_to_mach (fido_a | m68881));
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}
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return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features));
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}
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else
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/* They are incompatible. */
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return NULL;
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}
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