gas/config/tc-alpha.h

   1 /* This file is tc-alpha.h
   2    Copyright (C) 1994, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
   3    Written by Ken Raeburn <raeburn@cygnus.com>.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, USA.  */
  21
  22 #define TC_ALPHA
  23
  24 #define TARGET_BYTES_BIG_ENDIAN 0
  25
  26 #define WORKING_DOT_WORD
  27
  28 #define TARGET_ARCH                     bfd_arch_alpha
  29
  30 #define TARGET_FORMAT (OUTPUT_FLAVOR == bfd_target_ecoff_flavour        \
  31                        ? "ecoff-littlealpha"                            \
  32                        : OUTPUT_FLAVOR == bfd_target_elf_flavour        \
  33                        ? "elf64-alpha"                                  \
  34                        : OUTPUT_FLAVOR == bfd_target_evax_flavour       \
  35                        ? "vms-alpha"                                    \
  36                        : "unknown-format")
  37
  38 #define NEED_LITERAL_POOL
  39 #define TC_HANDLES_FX_DONE
  40 #define REPEAT_CONS_EXPRESSIONS
  41
  42 extern int alpha_force_relocation PARAMS ((struct fix *));
  43 extern int alpha_fix_adjustable PARAMS ((struct fix *));
  44
  45 extern unsigned long alpha_gprmask, alpha_fprmask;
  46 extern valueT alpha_gp_value;
  47
  48 #define TC_FORCE_RELOCATION(FIXP)       alpha_force_relocation (FIXP)
  49 #define tc_fix_adjustable(FIXP)         alpha_fix_adjustable (FIXP)
  50 #define RELOC_REQUIRES_SYMBOL
  51
  52 /* This expression evaluates to false if the relocation is for a local
  53    object for which we still want to do the relocation at runtime.
  54    True if we are willing to perform this relocation while building
  55    the .o file.  This is only used for pcrel relocations.  */
  56
  57 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)                           \
  58   ((FIX)->fx_addsy == NULL                                      \
  59    || (! S_IS_EXTERNAL ((FIX)->fx_addsy)                        \
  60        && ! S_IS_WEAK ((FIX)->fx_addsy)                         \
  61        && S_IS_DEFINED ((FIX)->fx_addsy)                        \
  62        && ! S_IS_COMMON ((FIX)->fx_addsy)))
  63
  64 #define md_convert_frag(b,s,f)          as_fatal ("alpha convert_frag\n")
  65 #define md_estimate_size_before_relax(f,s) \
  66                         (as_fatal("estimate_size_before_relax called"),1)
  67 #define md_operand(x)
  68
  69 #ifdef OBJ_EVAX
  70
  71 /* This field keeps the symbols position in the link section.  */
  72 #define OBJ_SYMFIELD_TYPE valueT
  73
  74 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) \
  75       fix_new_exp (FRAG, OFF, (int)LEN, EXP, 0, \
  76         LEN == 2 ? BFD_RELOC_16 \
  77         : LEN == 4 ? BFD_RELOC_32 \
  78         : LEN == 8 ? BFD_RELOC_64 \
  79         : BFD_RELOC_ALPHA_LINKAGE);
  80 #endif
  81
  82 #define md_number_to_chars              number_to_chars_littleendian
  83
  84 extern int tc_get_register PARAMS ((int frame));
  85 extern void alpha_frob_ecoff_data PARAMS ((void));
  86
  87 #define tc_frob_label(sym) alpha_define_label (sym)
  88 extern void alpha_define_label PARAMS ((symbolS *));
  89
  90 #define md_cons_align(nbytes) alpha_cons_align (nbytes)
  91 extern void alpha_cons_align PARAMS ((int));
  92
  93 #ifdef OBJ_ECOFF
  94 #define tc_frob_file_before_adjust() alpha_frob_file_before_adjust ()
  95 extern void alpha_frob_file_before_adjust PARAMS ((void));
  96 #endif
  97
  98 #define DIFF_EXPR_OK   /* foo-. gets turned into PC relative relocs */
  99
 100 #ifdef OBJ_ELF
 101 #define ELF_TC_SPECIAL_SECTIONS \
 102   { ".sdata",   SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL  }, \
 103   { ".sbss",    SHT_NOBITS,     SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL  },
 104 #endif
 105
 106 /* Whether to add support for explict !relocation_op!sequence_number.  At the
 107    moment, only do this for ELF, though ECOFF could use it as well.  */
 108
 109 #ifdef OBJ_ELF
 110 #define RELOC_OP_P
 111 #endif
 112
 113 #ifdef RELOC_OP_P
 114 /* Before the relocations are written, reorder them, so that user supplied
 115    !lituse relocations follow the appropriate !literal relocations.  Also
 116    convert the gas-internal relocations to the appropriate linker relocations.
 117    */
 118 #define tc_adjust_symtab() alpha_adjust_symtab ()
 119 extern void alpha_adjust_symtab PARAMS ((void));
 120
 121 /* New fields for supporting explicit relocations (such as !literal to mark
 122    where a pointer is loaded from the global table, and !lituse_base to track
 123    all of the normal uses of that pointer).  */
 124
 125 #define TC_FIX_TYPE struct alpha_fix_tag
 126
 127 struct alpha_fix_tag
 128 {
 129   struct fix *next_lituse;              /* next !lituse */
 130   struct alpha_literal_tag *info;       /* other members with same sequence */
 131 };
 132
 133 /* Initialize the TC_FIX_TYPE field.  */
 134 #define TC_INIT_FIX_DATA(fixP)                                          \
 135 do {                                                                    \
 136   fixP->tc_fix_data.next_lituse = (struct fix *)0;                      \
 137   fixP->tc_fix_data.info = (struct alpha_literal_tag *)0;               \
 138 } while (0)
 139
 140 /* Work with DEBUG5 to print fields in tc_fix_type.  */
 141 #define TC_FIX_DATA_PRINT(stream,fixP)                                  \
 142 do {                                                                    \
 143   if (fixP->tc_fix_data.info)                                           \
 144     fprintf (stderr, "\tinfo = 0x%lx, next_lituse = 0x%lx\n", \
 145              (long)fixP->tc_fix_data.info,                              \
 146              (long)fixP->tc_fix_data.next_lituse);                      \
 147 } while (0)
 148 #endif