gas/config/tc-alpha.h

   1 /* This file is tc-alpha.h
   2    Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
   3    Free Software Foundation, Inc.
   4    Written by Ken Raeburn <raeburn@cygnus.com>.
   5
   6    This file is part of GAS, the GNU Assembler.
   7
   8    GAS is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    GAS is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GAS; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, USA.  */
  22
  23 #define TC_ALPHA
  24
  25 #define TARGET_BYTES_BIG_ENDIAN 0
  26
  27 #define WORKING_DOT_WORD
  28
  29 #define TARGET_ARCH                     bfd_arch_alpha
  30
  31 #define TARGET_FORMAT (OUTPUT_FLAVOR == bfd_target_ecoff_flavour        \
  32                        ? "ecoff-littlealpha"                            \
  33                        : OUTPUT_FLAVOR == bfd_target_elf_flavour        \
  34                        ? "elf64-alpha"                                  \
  35                        : OUTPUT_FLAVOR == bfd_target_evax_flavour       \
  36                        ? "vms-alpha"                                    \
  37                        : "unknown-format")
  38
  39 #define NEED_LITERAL_POOL
  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 #define HANDLE_ALIGN(fragp) alpha_handle_align (fragp)
  94 extern void alpha_handle_align PARAMS ((struct frag *));
  95
  96 #define MAX_MEM_FOR_RS_ALIGN_CODE  (3 + 4 + 8)
  97
  98 #ifdef OBJ_ECOFF
  99 #define tc_frob_file_before_adjust() alpha_frob_file_before_adjust ()
 100 extern void alpha_frob_file_before_adjust PARAMS ((void));
 101 #endif
 102
 103 #define DIFF_EXPR_OK   /* foo-. gets turned into PC relative relocs */
 104
 105 #ifdef OBJ_ELF
 106 #define ELF_TC_SPECIAL_SECTIONS \
 107   { ".sdata",   SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL  }, \
 108   { ".sbss",    SHT_NOBITS,     SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL  },
 109
 110 #define md_elf_section_letter           alpha_elf_section_letter
 111 extern int alpha_elf_section_letter PARAMS ((int, char **));
 112 #define md_elf_section_flags            alpha_elf_section_flags
 113 extern flagword alpha_elf_section_flags PARAMS ((flagword, int, int));
 114 #endif
 115
 116 /* Whether to add support for explict !relocation_op!sequence_number.  At the
 117    moment, only do this for ELF, though ECOFF could use it as well.  */
 118
 119 #ifdef OBJ_ELF
 120 #define RELOC_OP_P
 121 #endif
 122
 123 /* Before the relocations are written, reorder them, so that user
 124    supplied !lituse relocations follow the appropriate !literal
 125    relocations.  Also convert the gas-internal relocations to the
 126    appropriate linker relocations.  */
 127 #define tc_adjust_symtab() alpha_adjust_symtab ()
 128 extern void alpha_adjust_symtab PARAMS ((void));
 129
 130 /* New fields for supporting explicit relocations (such as !literal to mark
 131    where a pointer is loaded from the global table, and !lituse_base to track
 132    all of the normal uses of that pointer).  */
 133
 134 #define TC_FIX_TYPE struct alpha_fix_tag
 135
 136 struct alpha_fix_tag
 137 {
 138   struct fix *next_reloc;               /* next !lituse or !gpdisp */
 139   struct alpha_reloc_tag *info;         /* other members with same sequence */
 140 };
 141
 142 /* Initialize the TC_FIX_TYPE field.  */
 143 #define TC_INIT_FIX_DATA(fixP)                                          \
 144 do {                                                                    \
 145   fixP->tc_fix_data.next_reloc = (struct fix *)0;                       \
 146   fixP->tc_fix_data.info = (struct alpha_literal_tag *)0;               \
 147 } while (0)
 148
 149 /* Work with DEBUG5 to print fields in tc_fix_type.  */
 150 #define TC_FIX_DATA_PRINT(stream,fixP)                                  \
 151 do {                                                                    \
 152   if (fixP->tc_fix_data.info)                                           \
 153     fprintf (stderr, "\tinfo = 0x%lx, next_reloc = 0x%lx\n", \
 154              (long)fixP->tc_fix_data.info,                              \
 155              (long)fixP->tc_fix_data.next_reloc);                       \
 156 } while (0)
 157
 158 #define DWARF2_LINE_MIN_INSN_LENGTH 4