gas/config/tc-m88k.h

   1 /* m88k.h -- Assembler for the Motorola 88000
   2    Contributed by Devon Bowen of Buffalo University
   3    and Torbjorn Granlund of the Swedish Institute of Computer Science.
   4    Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 96, 1997
   5    Free Software Foundation, Inc.
   6
   7 This file is part of GAS, the GNU Assembler.
   8
   9 GAS is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GAS is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GAS; see the file COPYING.  If not, write to the Free
  21 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  22 02111-1307, USA.  */
  23
  24 #define TC_M88K
  25
  26 #define TARGET_BYTES_BIG_ENDIAN 1
  27
  28 #ifdef M88KCOFF
  29 #define COFF_MAGIC MC88OMAGIC
  30 #define BFD_ARCH bfd_arch_m88k
  31 #define COFF_FLAGS F_AR32W
  32 #endif
  33
  34 #define NEED_FX_R_TYPE
  35 #define TC_KEEP_FX_OFFSET
  36 #define TC_CONS_RELOC RELOC_32
  37
  38 /* different type of relocation available in the m88k */
  39
  40 enum reloc_type
  41 {
  42   RELOC_LO16,                   /* lo16(sym) */
  43   RELOC_HI16,                   /* hi16(sym) */
  44   RELOC_PC16,                   /* bb0, bb1, bcnd */
  45   RELOC_PC26,                   /* br, bsr */
  46   RELOC_32,                     /* jump tables, etc */
  47   RELOC_IW16,                   /* global access through linker regs 28 */
  48   NO_RELOC
  49 };
  50
  51 struct reloc_info_m88k
  52 {
  53   unsigned long int r_address;
  54   unsigned int r_symbolnum:24;
  55   unsigned int r_extern:1;
  56   unsigned int r_pad:3;
  57   enum reloc_type r_type:4;
  58   long int r_addend;
  59 };
  60
  61 #define relocation_info reloc_info_m88k
  62
  63 /* The m88k uses '@' to start local labels.  */
  64 #define LEX_AT (LEX_BEGIN_NAME | LEX_NAME)
  65
  66 #ifndef BFD_ASSEMBLER
  67 #define LOCAL_LABEL(name) \
  68   ((name[0] =='@' && (name [1] == 'L' || name [1] == '.')) \
  69    || (name[0] == 'L' && name[1] == '0' && name[2] == '\001'))
  70 #endif
  71
  72 /* The m88k uses pseudo-ops with no leading period.  */
  73 #define NO_PSEUDO_DOT
  74
  75 /* Don't warn on word overflow; it happens on %hi relocs.  */
  76 #undef WARN_SIGNED_OVERFLOW_WORD
  77
  78 #define md_convert_frag(b,s,f)          {as_fatal (_("m88k convert_frag\n"));}
  79
  80 /* We don't need to do anything special for undefined symbols.  */
  81 #define md_undefined_symbol(s) 0
  82
  83 /* We have no special operand handling.  */
  84 #define md_operand(e)
  85
  86 #ifdef M88KCOFF
  87
  88 /* Whether a reloc should be output.  */
  89 #define TC_COUNT_RELOC(fixp) ((fixp)->fx_addsy != NULL)
  90
  91 /* Get the BFD reloc type to use for a gas fixS structure.  */
  92 #define TC_COFF_FIX2RTYPE(fixp) tc_coff_fix2rtype (fixp)
  93
  94 /* No special hook needed for symbols.  */
  95 #define tc_coff_symbol_emit_hook(s)
  96
  97 /* Align sections to a four byte boundary.  */
  98 #ifndef max
  99 #define max(a,b)        (((a) > (b)) ? (a) : (b))
 100 #endif
 101 #define SUB_SEGMENT_ALIGN(SEG)  max (section_alignment[(int) (SEG)], 4)
 102
 103 /* We use a special alignment function to insert the correct nop
 104    pattern in .init.  */
 105 extern int m88k_do_align PARAMS ((int, const char *, int, int));
 106 #define md_do_align(n,fill,len,max,l) if (m88k_do_align(n,fill,max,len)) goto l
 107
 108 #endif /* M88KCOFF */