gas/config/tc-arm.h

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