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      1 /* m68hc11 & m68hc12 ELF support for BFD.
      2    Copyright (C) 1999-2014 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_M68HC11_H
     21 #define _ELF_M68HC11_H
     22 
     23 #include "elf/reloc-macros.h"
     24 
     25 /* Relocation types.  */
     26 START_RELOC_NUMBERS (elf_m68hc11_reloc_type)
     27   RELOC_NUMBER (R_M68HC11_NONE, 0)
     28   RELOC_NUMBER (R_M68HC11_8, 1)
     29   RELOC_NUMBER (R_M68HC11_HI8, 2)
     30   RELOC_NUMBER (R_M68HC11_LO8, 3)
     31   RELOC_NUMBER (R_M68HC11_PCREL_8, 4)
     32   RELOC_NUMBER (R_M68HC11_16, 5)
     33   RELOC_NUMBER (R_M68HC11_32, 6)
     34   RELOC_NUMBER (R_M68HC11_3B, 7)
     35   RELOC_NUMBER (R_M68HC11_PCREL_16, 8)
     36 
     37      /* These are GNU extensions to enable C++ vtable garbage collection.  */
     38   RELOC_NUMBER (R_M68HC11_GNU_VTINHERIT, 9)
     39   RELOC_NUMBER (R_M68HC11_GNU_VTENTRY, 10)
     40 
     41   RELOC_NUMBER (R_M68HC11_24, 11)
     42   RELOC_NUMBER (R_M68HC11_LO16, 12)
     43   RELOC_NUMBER (R_M68HC11_PAGE, 13)
     44 
     45   RELOC_NUMBER (R_M68HC12_16B, 15)
     46   RELOC_NUMBER (R_M68HC12_PCREL_9, 16)
     47   RELOC_NUMBER (R_M68HC12_PCREL_10, 17)
     48   RELOC_NUMBER (R_M68HC12_HI8XG, 18)
     49   RELOC_NUMBER (R_M68HC12_LO8XG, 19)
     50 
     51      /* GNU extension for linker relaxation.
     52         Mark beginning of a jump instruction (any form).  */
     53   RELOC_NUMBER (R_M68HC11_RL_JUMP, 20)
     54 
     55      /* Mark beginning of Gcc relaxation group instruction.  */
     56   RELOC_NUMBER (R_M68HC11_RL_GROUP, 21)
     57 END_RELOC_NUMBERS (R_M68HC11_max)
     58 
     59 /* Processor specific flags for the ELF header e_flags field.  */
     60 
     61 /* ABI identification.  */
     62 #define EF_M68HC11_ABI  0x00000000F
     63 
     64 /* Integers are 32-bit long.  */
     65 #define E_M68HC11_I32   0x000000001
     66 
     67 /* Doubles are 64-bit long.  */
     68 #define E_M68HC11_F64   0x000000002
     69 
     70 /* Uses 68HC12 memory banks.  */
     71 #define E_M68HC12_BANKS 0x000000004
     72 
     73 /* XGATE ram offsetting.  */
     74 #define E_M68HC11_XGATE_RAMOFFSET     0x000000100
     75 
     76 /* Suppress warnings */
     77 #define E_M68HC11_NO_BANK_WARNING     0x000000200
     78 
     79 #define EF_M68HC11_MACH_MASK 0xF0
     80 #define EF_M68HC11_GENERIC   0x00 /* Generic 68HC12/backward compatibility.  */
     81 #define EF_M68HC12_MACH      0x10 /* 68HC12 microcontroller.  */
     82 #define EF_M68HCS12_MACH     0x20 /* 68HCS12 microcontroller.  */
     83 #define EF_M68HC11_MACH(mach) ((mach) & EF_M68HC11_MACH_MASK)
     84 
     85 /* True if we can merge machines.  A generic HC12 can work on any proc
     86    but once we have specific code, merge is not possible.  */
     87 #define EF_M68HC11_CAN_MERGE_MACH(mach1, mach2) \
     88   ((EF_M68HC11_MACH (mach1) == EF_M68HC11_MACH (mach2)) \
     89    || (EF_M68HC11_MACH (mach1) == EF_M68HC11_GENERIC) \
     90    || (EF_M68HC11_MACH (mach2) == EF_M68HC11_GENERIC))
     91 
     92 #define EF_M68HC11_MERGE_MACH(mach1, mach2) \
     93   (((EF_M68HC11_MACH (mach1) == EF_M68HC11_MACH (mach2)) \
     94     || (EF_M68HC11_MACH (mach1) == EF_M68HC11_GENERIC)) ? \
     95       EF_M68HC11_MACH (mach2) : EF_M68HC11_MACH (mach1))
     96 
     97 
     98 /* Special values for the st_other field in the symbol table.  These
    100    are used for 68HC12 to identify far functions (must be called with
    101    'call' and returns with 'rtc').  */
    102 #define STO_M68HC12_FAR          0x80
    103 
    104 /* Identify interrupt handlers.  This is used by the debugger to
    105    correctly compute the stack frame.  */
    106 #define STO_M68HC12_INTERRUPT    0x40
    107 
    108 #endif
    109