gas/config/tc-alpha.h

   1 /* This file is tc-alpha.h
   2    Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
   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 struct fix;
  43 struct alpha_reloc_tag;
  44
  45 extern void alpha_validate_fix PARAMS ((struct fix *));
  46 extern int alpha_force_relocation PARAMS ((struct fix *));
  47 extern int alpha_fix_adjustable PARAMS ((struct fix *));
  48
  49 extern unsigned long alpha_gprmask, alpha_fprmask;
  50 extern valueT alpha_gp_value;
  51
  52 #ifdef OBJ_ELF
  53 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) alpha_validate_fix (FIX)
  54 #endif
  55 #define TC_FORCE_RELOCATION(FIX)        alpha_force_relocation (FIX)
  56 #define tc_fix_adjustable(FIX)          alpha_fix_adjustable (FIX)
  57 #define RELOC_REQUIRES_SYMBOL
  58
  59 /* Values passed to md_apply_fix3 don't include the symbol value.  */
  60 #define MD_APPLY_SYM_VALUE(FIX) 0
  61
  62 #define md_convert_frag(b,s,f)          as_fatal ("alpha convert_frag\n")
  63 #define md_estimate_size_before_relax(f,s) \
  64                         (as_fatal ("estimate_size_before_relax called"),1)
  65 #define md_operand(x)
  66
  67 #ifdef OBJ_EVAX
  68
  69 /* This field keeps the symbols position in the link section.  */
  70 #define OBJ_SYMFIELD_TYPE valueT
  71
  72 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) \
  73       fix_new_exp (FRAG, OFF, (int)LEN, EXP, 0, \
  74         LEN == 2 ? BFD_RELOC_16 \
  75         : LEN == 4 ? BFD_RELOC_32 \
  76         : LEN == 8 ? BFD_RELOC_64 \
  77         : BFD_RELOC_ALPHA_LINKAGE);
  78 #endif
  79
  80 #define md_number_to_chars              number_to_chars_littleendian
  81
  82 extern int tc_get_register PARAMS ((int frame));
  83 extern void alpha_frob_ecoff_data PARAMS ((void));
  84
  85 #define tc_frob_label(sym) alpha_define_label (sym)
  86 extern void alpha_define_label PARAMS ((symbolS *));
  87
  88 #define md_cons_align(nbytes) alpha_cons_align (nbytes)
  89 extern void alpha_cons_align PARAMS ((int));
  90
  91 #define HANDLE_ALIGN(fragp) alpha_handle_align (fragp)
  92 extern void alpha_handle_align PARAMS ((struct frag *));
  93
  94 #define MAX_MEM_FOR_RS_ALIGN_CODE  (3 + 4 + 8)
  95
  96 #ifdef OBJ_ECOFF
  97 #define tc_frob_file_before_adjust() alpha_frob_file_before_adjust ()
  98 extern void alpha_frob_file_before_adjust PARAMS ((void));
  99 #endif
 100
 101 #define DIFF_EXPR_OK   /* foo-. gets turned into PC relative relocs */
 102
 103 #ifdef OBJ_ELF
 104 #define ELF_TC_SPECIAL_SECTIONS \
 105   { ".sdata",   SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL  }, \
 106   { ".sbss",    SHT_NOBITS,     SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL  },
 107
 108 #define md_elf_section_letter           alpha_elf_section_letter
 109 extern int alpha_elf_section_letter PARAMS ((int, char **));
 110 #define md_elf_section_flags            alpha_elf_section_flags
 111 extern flagword alpha_elf_section_flags PARAMS ((flagword, int, int));
 112 #endif
 113
 114 /* Whether to add support for explict !relocation_op!sequence_number.  At the
 115    moment, only do this for ELF, though ECOFF could use it as well.  */
 116
 117 #ifdef OBJ_ELF
 118 #define RELOC_OP_P
 119 #endif
 120
 121 /* Before the relocations are written, reorder them, so that user
 122    supplied !lituse relocations follow the appropriate !literal
 123    relocations.  Also convert the gas-internal relocations to the
 124    appropriate linker relocations.  */
 125 #define tc_frob_file_before_fix() alpha_before_fix ()
 126 extern void alpha_before_fix PARAMS ((void));
 127
 128 /* New fields for supporting explicit relocations (such as !literal to mark
 129    where a pointer is loaded from the global table, and !lituse_base to track
 130    all of the normal uses of that pointer).  */
 131
 132 #define TC_FIX_TYPE struct alpha_fix_tag
 133
 134 struct alpha_fix_tag
 135 {
 136   struct fix *next_reloc;               /* next !lituse or !gpdisp */
 137   struct alpha_reloc_tag *info;         /* other members with same sequence */
 138 };
 139
 140 /* Initialize the TC_FIX_TYPE field.  */
 141 #define TC_INIT_FIX_DATA(FIX)                                           \
 142 do {                                                                    \
 143   FIX->tc_fix_data.next_reloc = (struct fix *) 0;                       \
 144   FIX->tc_fix_data.info = (struct alpha_reloc_tag *) 0;                 \
 145 } while (0)
 146
 147 /* Work with DEBUG5 to print fields in tc_fix_type.  */
 148 #define TC_FIX_DATA_PRINT(STREAM, FIX)                                  \
 149 do {                                                                    \
 150   if (FIX->tc_fix_data.info)                                            \
 151     fprintf (STREAM, "\tinfo = 0x%lx, next_reloc = 0x%lx\n", \
 152              (long) FIX->tc_fix_data.info,                              \
 153              (long) FIX->tc_fix_data.next_reloc);                       \
 154 } while (0)
 155
 156 #define DWARF2_LINE_MIN_INSN_LENGTH 4