| /* BFD library support routines for architectures. |
| Copyright (C) 1990-2024 Free Software Foundation, Inc. |
| Hacked by Steve Chamberlain of Cygnus Support. |
| |
| 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" |
| #include "opcode/m68k.h" |
| #include "cpu-m68k.h" |
| |
| static const bfd_arch_info_type * |
| bfd_m68k_compatible (const bfd_arch_info_type *a, |
| const bfd_arch_info_type *b); |
| |
| #define N(name, print,d,next) \ |
| { 32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_m68k_compatible, \ |
| bfd_default_scan, bfd_arch_default_fill, next, 0 } |
| |
| static const bfd_arch_info_type arch_info_struct[] = |
| { |
| N(bfd_mach_m68000, "m68k:68000", false, &arch_info_struct[1]), |
| N(bfd_mach_m68008, "m68k:68008", false, &arch_info_struct[2]), |
| N(bfd_mach_m68010, "m68k:68010", false, &arch_info_struct[3]), |
| N(bfd_mach_m68020, "m68k:68020", false, &arch_info_struct[4]), |
| N(bfd_mach_m68030, "m68k:68030", false, &arch_info_struct[5]), |
| N(bfd_mach_m68040, "m68k:68040", false, &arch_info_struct[6]), |
| N(bfd_mach_m68060, "m68k:68060", false, &arch_info_struct[7]), |
| N(bfd_mach_cpu32, "m68k:cpu32", false, &arch_info_struct[8]), |
| N(bfd_mach_fido, "m68k:fido", false, &arch_info_struct[9]), |
| |
| /* Various combinations of CF architecture features */ |
| N(bfd_mach_mcf_isa_a_nodiv, "m68k:isa-a:nodiv", |
| false, &arch_info_struct[10]), |
| N(bfd_mach_mcf_isa_a, "m68k:isa-a", |
| false, &arch_info_struct[11]), |
| N(bfd_mach_mcf_isa_a_mac, "m68k:isa-a:mac", |
| false, &arch_info_struct[12]), |
| N(bfd_mach_mcf_isa_a_emac, "m68k:isa-a:emac", |
| false, &arch_info_struct[13]), |
| N(bfd_mach_mcf_isa_aplus, "m68k:isa-aplus", |
| false, &arch_info_struct[14]), |
| N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-aplus:mac", |
| false, &arch_info_struct[15]), |
| N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-aplus:emac", |
| false, &arch_info_struct[16]), |
| N(bfd_mach_mcf_isa_b_nousp, "m68k:isa-b:nousp", |
| false, &arch_info_struct[17]), |
| N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:isa-b:nousp:mac", |
| false, &arch_info_struct[18]), |
| N(bfd_mach_mcf_isa_b_nousp_emac, "m68k:isa-b:nousp:emac", |
| false, &arch_info_struct[19]), |
| N(bfd_mach_mcf_isa_b, "m68k:isa-b", |
| false, &arch_info_struct[20]), |
| N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac", |
| false, &arch_info_struct[21]), |
| N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac", |
| false, &arch_info_struct[22]), |
| N(bfd_mach_mcf_isa_b_float, "m68k:isa-b:float", |
| false, &arch_info_struct[23]), |
| N(bfd_mach_mcf_isa_b_float_mac, "m68k:isa-b:float:mac", |
| false, &arch_info_struct[24]), |
| N(bfd_mach_mcf_isa_b_float_emac, "m68k:isa-b:float:emac", |
| false, &arch_info_struct[25]), |
| N(bfd_mach_mcf_isa_c, "m68k:isa-c", |
| false, &arch_info_struct[26]), |
| N(bfd_mach_mcf_isa_c_mac, "m68k:isa-c:mac", |
| false, &arch_info_struct[27]), |
| N(bfd_mach_mcf_isa_c_emac, "m68k:isa-c:emac", |
| false, &arch_info_struct[28]), |
| N(bfd_mach_mcf_isa_c_nodiv, "m68k:isa-c:nodiv", |
| false, &arch_info_struct[29]), |
| N(bfd_mach_mcf_isa_c_nodiv_mac, "m68k:isa-c:nodiv:mac", |
| false, &arch_info_struct[30]), |
| N(bfd_mach_mcf_isa_c_nodiv_emac, "m68k:isa-c:nodiv:emac", |
| false, &arch_info_struct[31]), |
| |
| /* Legacy names for CF architectures */ |
| N(bfd_mach_mcf_isa_a_nodiv, "m68k:5200", false, &arch_info_struct[32]), |
| N(bfd_mach_mcf_isa_a_mac,"m68k:5206e", false, &arch_info_struct[33]), |
| N(bfd_mach_mcf_isa_a_mac, "m68k:5307", false, &arch_info_struct[34]), |
| N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:5407", false, &arch_info_struct[35]), |
| N(bfd_mach_mcf_isa_aplus_emac, "m68k:528x", false, &arch_info_struct[36]), |
| N(bfd_mach_mcf_isa_aplus_emac, "m68k:521x", false, &arch_info_struct[37]), |
| N(bfd_mach_mcf_isa_a_emac, "m68k:5249", false, &arch_info_struct[38]), |
| N(bfd_mach_mcf_isa_b_float_emac, "m68k:547x", |
| false, &arch_info_struct[39]), |
| N(bfd_mach_mcf_isa_b_float_emac, "m68k:548x", |
| false, &arch_info_struct[40]), |
| N(bfd_mach_mcf_isa_b_float_emac, "m68k:cfv4e", false, 0), |
| }; |
| |
| const bfd_arch_info_type bfd_m68k_arch = |
| N(0, "m68k", true, &arch_info_struct[0]); |
| |
| /* Table indexed by bfd_mach_arch number indicating which |
| architectural features are supported. */ |
| static const unsigned m68k_arch_features[] = |
| { |
| 0, |
| m68000|m68881|m68851, |
| m68000|m68881|m68851, |
| m68010|m68881|m68851, |
| m68020|m68881|m68851, |
| m68030|m68881|m68851, |
| m68040|m68881|m68851, |
| m68060|m68881|m68851, |
| cpu32|m68881, |
| fido_a|m68881, |
| mcfisa_a, |
| mcfisa_a|mcfhwdiv, |
| mcfisa_a|mcfhwdiv|mcfmac, |
| mcfisa_a|mcfhwdiv|mcfemac, |
| mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp, |
| mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac, |
| mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac, |
| mcfisa_a|mcfhwdiv|mcfisa_b, |
| mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac, |
| mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac, |
| mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp, |
| mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfmac, |
| mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfemac, |
| mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat, |
| mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac, |
| mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac, |
| mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp, |
| mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfmac, |
| mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfemac, |
| mcfisa_a|mcfisa_c|mcfusp, |
| mcfisa_a|mcfisa_c|mcfusp|mcfmac, |
| mcfisa_a|mcfisa_c|mcfusp|mcfemac, |
| }; |
| |
| /* Return the count of bits set in MASK */ |
| static unsigned |
| bit_count (unsigned mask) |
| { |
| unsigned ix; |
| |
| for (ix = 0; mask; ix++) |
| /* Clear the LSB set */ |
| mask ^= mask & -mask; |
| return ix; |
| } |
| |
| /* Return the architectural features supported by MACH */ |
| |
| unsigned |
| bfd_m68k_mach_to_features (int mach) |
| { |
| if ((unsigned)mach |
| >= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0])) |
| mach = 0; |
| return m68k_arch_features[mach]; |
| } |
| |
| /* Return the bfd machine that most closely represents the |
| architectural features. We find the machine with the smallest |
| number of additional features. If there is no such machine, we |
| find the one with the smallest number of missing features. */ |
| |
| int bfd_m68k_features_to_mach (unsigned features) |
| { |
| int superset = 0, subset = 0; |
| unsigned extra = 99, missing = 99; |
| unsigned ix; |
| |
| for (ix = 0; |
| ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]); |
| ix++) |
| { |
| unsigned this_extra, this_missing; |
| |
| if (m68k_arch_features[ix] == features) |
| return ix; |
| this_extra = bit_count (m68k_arch_features[ix] & ~features); |
| if (this_extra < extra) |
| { |
| extra = this_extra; |
| superset = ix; |
| } |
| |
| this_missing = bit_count (features & ~m68k_arch_features[ix]); |
| if (this_missing < missing) |
| { |
| missing = this_missing; |
| superset = ix; |
| } |
| } |
| return superset ? superset : subset; |
| } |
| |
| static const bfd_arch_info_type * |
| bfd_m68k_compatible (const bfd_arch_info_type *a, |
| const bfd_arch_info_type *b) |
| { |
| if (a->arch != b->arch) |
| return NULL; |
| |
| if (a->bits_per_word != b->bits_per_word) |
| return NULL; |
| |
| if (!a->mach) |
| return b; |
| if (!b->mach) |
| return a; |
| |
| if (a->mach <= bfd_mach_m68060 && b->mach <= bfd_mach_m68060) |
| /* Merge m68k machine. */ |
| return a->mach > b->mach ? a : b; |
| else if (a->mach >= bfd_mach_cpu32 && b->mach >= bfd_mach_cpu32) |
| { |
| /* Merge the machine features. */ |
| unsigned features = (bfd_m68k_mach_to_features (a->mach) |
| | bfd_m68k_mach_to_features (b->mach)); |
| |
| /* CPU32 and Coldfire are incompatible. */ |
| if ((~features & (cpu32 | mcfisa_a)) == 0) |
| return NULL; |
| |
| /* Fido and Coldfire are incompatible. */ |
| if ((~features & (fido_a | mcfisa_a)) == 0) |
| return NULL; |
| |
| /* ISA A+ and ISA B are incompatible. */ |
| if ((~features & (mcfisa_aa | mcfisa_b)) == 0) |
| return NULL; |
| |
| /* ISA B and ISA C are incompatible. */ |
| if ((~features & (mcfisa_b | mcfisa_c)) == 0) |
| return NULL; |
| |
| /* MAC and EMAC code cannot be merged. */ |
| if ((~features & (mcfmac | mcfemac)) == 0) |
| return NULL; |
| |
| /* CPU32 is compatible with Fido except that Fido does not |
| support tbl instructions. Warn when the user wants to mix |
| the two. */ |
| if ((a->mach == bfd_mach_cpu32 && b->mach == bfd_mach_fido) |
| || (a->mach == bfd_mach_fido && b->mach == bfd_mach_cpu32)) |
| { |
| static int cpu32_fido_mix_warning; |
| if (!cpu32_fido_mix_warning) |
| { |
| cpu32_fido_mix_warning = 1; |
| _bfd_error_handler ("warning: linking CPU32 objects with fido objects"); |
| } |
| return bfd_lookup_arch (a->arch, |
| bfd_m68k_features_to_mach (fido_a | m68881)); |
| } |
| |
| return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features)); |
| } |
| else |
| /* They are incompatible. */ |
| return NULL; |
| } |