include/elf/m68k.h

   1 /* MC68k ELF support for BFD.
   2    Copyright (C) 1998-2024 Free Software Foundation, Inc.
   3
   4    This file is part of BFD, the Binary File Descriptor library.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software Foundation,
  18    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  19
  20 #ifndef _ELF_M68K_H
  21 #define _ELF_M68K_H
  22
  23 #include "elf/reloc-macros.h"
  24
  25 /* Relocation types.  */
  26 START_RELOC_NUMBERS (elf_m68k_reloc_type)
  27   RELOC_NUMBER (R_68K_NONE, 0)          /* No reloc */
  28   RELOC_NUMBER (R_68K_32, 1)            /* Direct 32 bit  */
  29   RELOC_NUMBER (R_68K_16, 2)            /* Direct 16 bit  */
  30   RELOC_NUMBER (R_68K_8, 3)             /* Direct 8 bit  */
  31   RELOC_NUMBER (R_68K_PC32, 4)          /* PC relative 32 bit */
  32   RELOC_NUMBER (R_68K_PC16, 5)          /* PC relative 16 bit */
  33   RELOC_NUMBER (R_68K_PC8, 6)           /* PC relative 8 bit */
  34   RELOC_NUMBER (R_68K_GOT32, 7)         /* 32 bit PC relative GOT entry */
  35   RELOC_NUMBER (R_68K_GOT16, 8)         /* 16 bit PC relative GOT entry */
  36   RELOC_NUMBER (R_68K_GOT8, 9)          /* 8 bit PC relative GOT entry */
  37   RELOC_NUMBER (R_68K_GOT32O, 10)       /* 32 bit GOT offset */
  38   RELOC_NUMBER (R_68K_GOT16O, 11)       /* 16 bit GOT offset */
  39   RELOC_NUMBER (R_68K_GOT8O, 12)        /* 8 bit GOT offset */
  40   RELOC_NUMBER (R_68K_PLT32, 13)        /* 32 bit PC relative PLT address */
  41   RELOC_NUMBER (R_68K_PLT16, 14)        /* 16 bit PC relative PLT address */
  42   RELOC_NUMBER (R_68K_PLT8, 15)         /* 8 bit PC relative PLT address */
  43   RELOC_NUMBER (R_68K_PLT32O, 16)       /* 32 bit PLT offset */
  44   RELOC_NUMBER (R_68K_PLT16O, 17)       /* 16 bit PLT offset */
  45   RELOC_NUMBER (R_68K_PLT8O, 18)        /* 8 bit PLT offset */
  46   RELOC_NUMBER (R_68K_COPY, 19)         /* Copy symbol at runtime */
  47   RELOC_NUMBER (R_68K_GLOB_DAT, 20)     /* Create GOT entry */
  48   RELOC_NUMBER (R_68K_JMP_SLOT, 21)     /* Create PLT entry */
  49   RELOC_NUMBER (R_68K_RELATIVE, 22)     /* Adjust by program base */
  50   /* These are GNU extensions to enable C++ vtable garbage collection.  */
  51   RELOC_NUMBER (R_68K_GNU_VTINHERIT, 23)
  52   RELOC_NUMBER (R_68K_GNU_VTENTRY, 24)
  53   /* TLS static relocations.  */
  54   RELOC_NUMBER (R_68K_TLS_GD32, 25)
  55   RELOC_NUMBER (R_68K_TLS_GD16, 26)
  56   RELOC_NUMBER (R_68K_TLS_GD8, 27)
  57   RELOC_NUMBER (R_68K_TLS_LDM32, 28)
  58   RELOC_NUMBER (R_68K_TLS_LDM16, 29)
  59   RELOC_NUMBER (R_68K_TLS_LDM8, 30)
  60   RELOC_NUMBER (R_68K_TLS_LDO32, 31)
  61   RELOC_NUMBER (R_68K_TLS_LDO16, 32)
  62   RELOC_NUMBER (R_68K_TLS_LDO8, 33)
  63   RELOC_NUMBER (R_68K_TLS_IE32, 34)
  64   RELOC_NUMBER (R_68K_TLS_IE16, 35)
  65   RELOC_NUMBER (R_68K_TLS_IE8, 36)
  66   RELOC_NUMBER (R_68K_TLS_LE32, 37)
  67   RELOC_NUMBER (R_68K_TLS_LE16, 38)
  68   RELOC_NUMBER (R_68K_TLS_LE8, 39)
  69   RELOC_NUMBER (R_68K_TLS_DTPMOD32, 40)
  70   RELOC_NUMBER (R_68K_TLS_DTPREL32, 41)
  71   RELOC_NUMBER (R_68K_TLS_TPREL32, 42)
  72 END_RELOC_NUMBERS (R_68K_max)
  73
  74 /* We use the top 24 bits to encode information about the
  75    architecture variant.  */
  76 #define EF_M68K_CPU32    0x00810000
  77 #define EF_M68K_M68000   0x01000000
  78 #define EF_M68K_CFV4E    0x00008000
  79 #define EF_M68K_FIDO     0x02000000
  80 #define EF_M68K_ARCH_MASK                                               \
  81   (EF_M68K_M68000 | EF_M68K_CPU32 | EF_M68K_CFV4E | EF_M68K_FIDO)
  82
  83 /* We use the bottom 8 bits to encode information about the
  84    coldfire variant.  If we use any of these bits, the top 24 bits are
  85    either 0 or EF_M68K_CFV4E.  */
  86 #define EF_M68K_CF_ISA_MASK     0x0F  /* Which ISA */
  87 #define EF_M68K_CF_ISA_A_NODIV  0x01  /* ISA A except for div */
  88 #define EF_M68K_CF_ISA_A        0x02
  89 #define EF_M68K_CF_ISA_A_PLUS   0x03
  90 #define EF_M68K_CF_ISA_B_NOUSP  0x04  /* ISA_B except for USP */
  91 #define EF_M68K_CF_ISA_B        0x05
  92 #define EF_M68K_CF_ISA_C        0x06
  93 #define EF_M68K_CF_ISA_C_NODIV  0x07  /* ISA C except for div */
  94 #define EF_M68K_CF_MAC_MASK     0x30
  95 #define EF_M68K_CF_MAC          0x10  /* MAC */
  96 #define EF_M68K_CF_EMAC         0x20  /* EMAC */
  97 #define EF_M68K_CF_EMAC_B       0x30  /* EMAC_B */
  98 #define EF_M68K_CF_FLOAT        0x40  /* Has float insns */
  99 #define EF_M68K_CF_MASK         0xFF
 100
 101 /* GNU object attribute tags.  */
 102 enum
 103 {
 104   /* 0-3 are generic.  */
 105
 106   /* FP ABI, low 2 bits:
 107      1 for double precision hard-float,
 108      2 for soft-float,
 109      0 for not tagged or not using any ABIs affected by the differences. */
 110   Tag_GNU_M68K_ABI_FP = 4,
 111 };
 112
 113 #endif