gas/config/tc-arm.h

   1 /* This file is tc-arm.h
   2    Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   3    Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
   4         Modified by David Taylor (dtaylor@armltd.co.uk)
   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_ARM 1
  24
  25 #ifndef TARGET_BYTES_BIG_ENDIAN
  26 #define TARGET_BYTES_BIG_ENDIAN 0
  27 #endif
  28
  29 #define WORKING_DOT_WORD
  30
  31 #define COFF_MAGIC      ARMMAGIC
  32 #define TARGET_ARCH     bfd_arch_arm
  33
  34 #define AOUT_MACHTYPE   0
  35
  36 #define DIFF_EXPR_OK
  37
  38 #ifdef  LITTLE_ENDIAN
  39 #undef  LITTLE_ENDIAN
  40 #endif
  41
  42 #ifdef  BIG_ENDIAN
  43 #undef  BIG_ENDIAN
  44 #endif
  45
  46 #define LITTLE_ENDIAN   1234
  47 #define BIG_ENDIAN      4321
  48
  49 #if defined OBJ_AOUT
  50 #if defined TE_RISCIX
  51 # define TARGET_FORMAT "a.out-riscix"
  52 #elif defined TE_LINUX
  53 # define ARM_BI_ENDIAN
  54 # define TARGET_FORMAT "a.out-arm-linux"
  55 #elif defined TE_NetBSD
  56 # define TARGET_FORMAT "a.out-arm-netbsd"
  57 #else
  58 # define ARM_BI_ENDIAN
  59 # define TARGET_FORMAT \
  60   (target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
  61 #endif
  62 #endif /* OBJ_AOUT */
  63
  64 #ifdef OBJ_AIF
  65 #define TARGET_FORMAT "aif"
  66 #endif
  67
  68 #if defined OBJ_COFF || defined OBJ_ELF
  69 # define ARM_BI_ENDIAN
  70
  71 # define TC_VALIDATE_FIX(fixP, segType, Label) \
  72      if (arm_validate_fix (fixP)) add_symbolP = fixP->fx_addsy
  73   extern boolean arm_validate_fix PARAMS ((struct fix *));
  74 #endif
  75
  76 #ifdef OBJ_COFF
  77 # if defined TE_PE
  78 #  define TC_FORCE_RELOCATION(x) ((x)->fx_r_type == BFD_RELOC_RVA)
  79 #   ifdef TE_EPOC
  80 #    define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
  81 #   else
  82 #    define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
  83 #   endif
  84 # else
  85 #  define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little")
  86 # endif
  87 #endif
  88
  89 #ifdef OBJ_ELF
  90 # define TARGET_FORMAT elf32_arm_target_format()
  91   extern const char * elf32_arm_target_format PARAMS ((void));
  92
  93 # define TC_FORCE_RELOCATION(fixp) arm_force_relocation (fixp)
  94   extern int arm_force_relocation PARAMS ((struct fix *));
  95 #endif
  96
  97 #define md_convert_frag(b, s, f) {as_fatal (_("arm convert_frag\n"));}
  98
  99 #define md_cleanup() arm_cleanup ()
 100  extern void arm_cleanup PARAMS ((void));
 101
 102 #define md_start_line_hook() arm_start_line_hook ()
 103  extern void arm_start_line_hook PARAMS ((void));
 104
 105 #define tc_frob_label(S) arm_frob_label (S)
 106  extern void arm_frob_label PARAMS ((struct symbol *));
 107
 108 /* We also need to mark assembler created symbols:  */
 109 #define tc_frob_fake_label(S) arm_frob_label (S)
 110
 111 /* NOTE: The fake label creation in stabs.c:s_stab_generic() has
 112    deliberately not been updated to mark assembler created stabs
 113    symbols as Thumb.  */
 114
 115 #ifdef OBJ_ELF
 116 #define obj_fix_adjustable(fixP) arm_fix_adjustable (fixP)
 117 #else
 118 #define obj_fix_adjustable(fixP) 0
 119 #endif
 120
 121 /* We need to keep some local information on symbols.  */
 122
 123 #define TC_SYMFIELD_TYPE unsigned int
 124 #define ARM_GET_FLAG(s)         ((s)->sy_tc)
 125 #define ARM_SET_FLAG(s,v)       ((s)->sy_tc |= (v))
 126 #define ARM_RESET_FLAG(s,v)     ((s)->sy_tc &= ~(v))
 127
 128 #define ARM_FLAG_THUMB          (1 << 0)        /* The symbol is a Thumb symbol rather than an Arm symbol.  */
 129 #define ARM_FLAG_INTERWORK      (1 << 1)        /* The symbol is attached to code that suppports interworking.  */
 130 #define THUMB_FLAG_FUNC         (1 << 2)        /* The symbol is attached to the start of a Thumb function.  */
 131
 132 #define ARM_IS_THUMB(s)         (ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
 133 #define ARM_IS_INTERWORK(s)     (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
 134 #define THUMB_IS_FUNC(s)        (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
 135
 136 #define ARM_SET_THUMB(s,t)      ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB)     : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
 137 #define ARM_SET_INTERWORK(s,t)  ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
 138 #define THUMB_SET_FUNC(s,t)     ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC)    : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))
 139
 140
 141 #define TC_FIX_TYPE PTR
 142 #define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL)
 143
 144 #define TC_START_LABEL(C,STR) \
 145   (c == ':' || (c == '/' && arm_data_in_code ()))
 146 int arm_data_in_code PARAMS ((void));
 147
 148 #define tc_canonicalize_symbol_name(str) \
 149  arm_canonicalize_symbol_name (str);
 150 char * arm_canonicalize_symbol_name PARAMS ((char *));
 151
 152 #define obj_adjust_symtab() arm_adjust_symtab ()
 153  extern void arm_adjust_symtab PARAMS ((void));
 154
 155 #ifdef OBJ_ELF
 156 #define obj_frob_symbol(sym, punt)  armelf_frob_symbol (sym, punt)
 157 #endif
 158
 159 #define tc_aout_pre_write_hook(x)       {;}     /* not used */
 160
 161 #define LISTING_HEADER "ARM GAS "
 162
 163 #define OPTIONAL_REGISTER_PREFIX '%'
 164
 165 #define md_operand(x)
 166
 167 #define TC_HANDLES_FX_DONE
 168
 169 #define MD_APPLY_FIX3
 170
 171 #define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L'))
 172 #define LOCAL_LABELS_FB   1
 173
 174 /* This expression evaluates to false if the relocation is for a local object
 175    for which we still want to do the relocation at runtime.  True if we
 176    are willing to perform this relocation while building the .o file.
 177    This is only used for pcrel relocations, so GOTOFF does not need to be
 178    checked here.  I am not sure if some of the others are ever used with
 179    pcrel, but it is easier to be safe than sorry.  */
 180
 181 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)  \
 182    (  (FIX)->fx_r_type != BFD_RELOC_ARM_GOT12 \
 183    && (FIX)->fx_r_type != BFD_RELOC_ARM_GOT32 \
 184    && (FIX)->fx_r_type != BFD_RELOC_32)
 185
 186 #define TC_CONS_FIX_NEW cons_fix_new_arm
 187  extern void cons_fix_new_arm PARAMS ((fragS *, int, int, expressionS *));
 188
 189 /* Don't allow symbols to be discarded on GOT related relocs,
 190    nor on globals.  */
 191 #define tc_fix_adjustable(x) (\
 192      ((x)->fx_r_type == BFD_RELOC_ARM_PLT32 \
 193    || (x)->fx_r_type == BFD_RELOC_ARM_GOT32 \
 194    || (x)->fx_r_type == BFD_RELOC_ARM_GOTOFF \
 195    || S_IS_EXTERN ((x)->fx_addsy) \
 196    || S_IS_WEAK ((x)->fx_addsy)) ? 0 : 1)
 197
 198 #ifdef OBJ_ELF
 199 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 200 #else
 201 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
 202 #endif
 203
 204 /* end of tc-arm.h */