include/elf/m68k.h

/* MC68k ELF support for BFD.
   Copyright (C) 1998-2021 Free Software Foundation, Inc.

   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.  */

#ifndef _ELF_M68K_H
#define _ELF_M68K_H

#include "elf/reloc-macros.h"

/* Relocation types.  */
START_RELOC_NUMBERS (elf_m68k_reloc_type)
  RELOC_NUMBER (R_68K_NONE, 0)		/* No reloc */
  RELOC_NUMBER (R_68K_32, 1)		/* Direct 32 bit  */
  RELOC_NUMBER (R_68K_16, 2)		/* Direct 16 bit  */
  RELOC_NUMBER (R_68K_8, 3)		/* Direct 8 bit  */
  RELOC_NUMBER (R_68K_PC32, 4)		/* PC relative 32 bit */
  RELOC_NUMBER (R_68K_PC16, 5)		/* PC relative 16 bit */
  RELOC_NUMBER (R_68K_PC8, 6)		/* PC relative 8 bit */
  RELOC_NUMBER (R_68K_GOT32, 7)		/* 32 bit PC relative GOT entry */
  RELOC_NUMBER (R_68K_GOT16, 8)		/* 16 bit PC relative GOT entry */
  RELOC_NUMBER (R_68K_GOT8, 9)		/* 8 bit PC relative GOT entry */
  RELOC_NUMBER (R_68K_GOT32O, 10)	/* 32 bit GOT offset */
  RELOC_NUMBER (R_68K_GOT16O, 11)	/* 16 bit GOT offset */
  RELOC_NUMBER (R_68K_GOT8O, 12)	/* 8 bit GOT offset */
  RELOC_NUMBER (R_68K_PLT32, 13)	/* 32 bit PC relative PLT address */
  RELOC_NUMBER (R_68K_PLT16, 14)	/* 16 bit PC relative PLT address */
  RELOC_NUMBER (R_68K_PLT8, 15)		/* 8 bit PC relative PLT address */
  RELOC_NUMBER (R_68K_PLT32O, 16)	/* 32 bit PLT offset */
  RELOC_NUMBER (R_68K_PLT16O, 17)	/* 16 bit PLT offset */
  RELOC_NUMBER (R_68K_PLT8O, 18)	/* 8 bit PLT offset */
  RELOC_NUMBER (R_68K_COPY, 19)		/* Copy symbol at runtime */
  RELOC_NUMBER (R_68K_GLOB_DAT, 20)	/* Create GOT entry */
  RELOC_NUMBER (R_68K_JMP_SLOT, 21)	/* Create PLT entry */
  RELOC_NUMBER (R_68K_RELATIVE, 22)	/* Adjust by program base */
  /* These are GNU extensions to enable C++ vtable garbage collection.  */
  RELOC_NUMBER (R_68K_GNU_VTINHERIT, 23)
  RELOC_NUMBER (R_68K_GNU_VTENTRY, 24)
  /* TLS static relocations.  */
  RELOC_NUMBER (R_68K_TLS_GD32, 25)
  RELOC_NUMBER (R_68K_TLS_GD16, 26)
  RELOC_NUMBER (R_68K_TLS_GD8, 27)
  RELOC_NUMBER (R_68K_TLS_LDM32, 28)
  RELOC_NUMBER (R_68K_TLS_LDM16, 29)
  RELOC_NUMBER (R_68K_TLS_LDM8, 30)
  RELOC_NUMBER (R_68K_TLS_LDO32, 31)
  RELOC_NUMBER (R_68K_TLS_LDO16, 32)
  RELOC_NUMBER (R_68K_TLS_LDO8, 33)
  RELOC_NUMBER (R_68K_TLS_IE32, 34)
  RELOC_NUMBER (R_68K_TLS_IE16, 35)
  RELOC_NUMBER (R_68K_TLS_IE8, 36)
  RELOC_NUMBER (R_68K_TLS_LE32, 37)
  RELOC_NUMBER (R_68K_TLS_LE16, 38)
  RELOC_NUMBER (R_68K_TLS_LE8, 39)
  RELOC_NUMBER (R_68K_TLS_DTPMOD32, 40)
  RELOC_NUMBER (R_68K_TLS_DTPREL32, 41)
  RELOC_NUMBER (R_68K_TLS_TPREL32, 42)
END_RELOC_NUMBERS (R_68K_max)

/* We use the top 24 bits to encode information about the
   architecture variant.  */
#define EF_M68K_CPU32    0x00810000
#define EF_M68K_M68000   0x01000000
#define EF_M68K_CFV4E    0x00008000
#define EF_M68K_FIDO     0x02000000
#define EF_M68K_ARCH_MASK						\
  (EF_M68K_M68000 | EF_M68K_CPU32 | EF_M68K_CFV4E | EF_M68K_FIDO)

/* We use the bottom 8 bits to encode information about the
   coldfire variant.  If we use any of these bits, the top 24 bits are
   either 0 or EF_M68K_CFV4E.  */
#define EF_M68K_CF_ISA_MASK	0x0F  /* Which ISA */
#define EF_M68K_CF_ISA_A_NODIV	0x01  /* ISA A except for div */
#define EF_M68K_CF_ISA_A	0x02
#define EF_M68K_CF_ISA_A_PLUS	0x03
#define EF_M68K_CF_ISA_B_NOUSP	0x04  /* ISA_B except for USP */
#define EF_M68K_CF_ISA_B	0x05
#define EF_M68K_CF_ISA_C	0x06
#define EF_M68K_CF_ISA_C_NODIV	0x07  /* ISA C except for div */
#define EF_M68K_CF_MAC_MASK	0x30 
#define EF_M68K_CF_MAC		0x10  /* MAC */
#define EF_M68K_CF_EMAC		0x20  /* EMAC */
#define EF_M68K_CF_EMAC_B	0x30  /* EMAC_B */
#define EF_M68K_CF_FLOAT	0x40  /* Has float insns */
#define EF_M68K_CF_MASK		0xFF

/* GNU object attribute tags.  */
enum
{
  /* 0-3 are generic.  */

  /* FP ABI, low 2 bits:
     1 for double precision hard-float,
     2 for soft-float,
     0 for not tagged or not using any ABIs affected by the differences. */
  Tag_GNU_M68K_ABI_FP = 4,
};

#endif