gas/config/tc-arm.h

   1 /* This file is tc-arm.h
   2    Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
   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 struct fix;
  70
  71 #if defined OBJ_COFF || defined OBJ_ELF
  72 # define ARM_BI_ENDIAN
  73
  74 # define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
  75   extern void arm_validate_fix PARAMS ((struct fix *));
  76 #endif
  77
  78 #ifdef OBJ_COFF
  79 # if defined TE_PE
  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 md_elf_section_change_hook() arm_elf_change_section
  95   extern void arm_elf_change_section (void);
  96 #endif
  97
  98 #define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
  99 extern int arm_force_relocation PARAMS ((struct fix *));
 100
 101 #define md_convert_frag(b, s, f) {as_fatal (_("arm convert_frag\n"));}
 102
 103 #define md_cleanup() arm_cleanup ()
 104  extern void arm_cleanup PARAMS ((void));
 105
 106 #define md_start_line_hook() arm_start_line_hook ()
 107  extern void arm_start_line_hook PARAMS ((void));
 108
 109 #define tc_frob_label(S) arm_frob_label (S)
 110  extern void arm_frob_label PARAMS ((symbolS *));
 111
 112 /* We also need to mark assembler created symbols:  */
 113 #define tc_frob_fake_label(S) arm_frob_label (S)
 114
 115 /* NOTE: The fake label creation in stabs.c:s_stab_generic() has
 116    deliberately not been updated to mark assembler created stabs
 117    symbols as Thumb.  */
 118
 119 #define TC_FIX_TYPE PTR
 120 #define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL)
 121
 122 #if defined OBJ_ELF || defined OBJ_COFF
 123 #define EXTERN_FORCE_RELOC 1
 124
 125 #define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX)
 126 bfd_boolean arm_fix_adjustable PARAMS ((struct fix *));
 127
 128 /* Values passed to md_apply_fix3 don't include the symbol value.  */
 129 #define MD_APPLY_SYM_VALUE(FIX) 0
 130 #endif
 131
 132 /* We need to keep some local information on symbols.  */
 133
 134 #define TC_SYMFIELD_TYPE unsigned int
 135 #define ARM_GET_FLAG(s)         (*symbol_get_tc (s))
 136 #define ARM_SET_FLAG(s,v)       (*symbol_get_tc (s) |= (v))
 137 #define ARM_RESET_FLAG(s,v)     (*symbol_get_tc (s) &= ~(v))
 138
 139 #define ARM_FLAG_THUMB          (1 << 0)        /* The symbol is a Thumb symbol rather than an Arm symbol.  */
 140 #define ARM_FLAG_INTERWORK      (1 << 1)        /* The symbol is attached to code that suppports interworking.  */
 141 #define THUMB_FLAG_FUNC         (1 << 2)        /* The symbol is attached to the start of a Thumb function.  */
 142
 143 #define ARM_IS_THUMB(s)         (ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
 144 #define ARM_IS_INTERWORK(s)     (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
 145 #define THUMB_IS_FUNC(s)        (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
 146
 147 #define ARM_SET_THUMB(s,t)      ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB)     : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
 148 #define ARM_SET_INTERWORK(s,t)  ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
 149 #define THUMB_SET_FUNC(s,t)     ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC)    : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))
 150
 151 #define TC_START_LABEL(C,STR) \
 152   (c == ':' || (c == '/' && arm_data_in_code ()))
 153 int arm_data_in_code PARAMS ((void));
 154
 155 #define tc_canonicalize_symbol_name(str) \
 156  arm_canonicalize_symbol_name (str);
 157 char * arm_canonicalize_symbol_name PARAMS ((char *));
 158
 159 #define obj_adjust_symtab() arm_adjust_symtab ()
 160  extern void arm_adjust_symtab PARAMS ((void));
 161
 162 #ifdef OBJ_ELF
 163 #define obj_frob_symbol(sym, punt)  armelf_frob_symbol ((sym), & (punt))
 164 void armelf_frob_symbol PARAMS ((symbolS *, int *));
 165 #endif
 166
 167 #define tc_aout_pre_write_hook(x)       {;}     /* not used */
 168
 169 #define LISTING_HEADER "ARM GAS "
 170
 171 #define OPTIONAL_REGISTER_PREFIX '%'
 172
 173 #define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L'))
 174 #define LOCAL_LABELS_FB   1
 175 #ifdef OBJ_ELF
 176 #define LOCAL_LABEL_PREFIX '.'
 177 #endif
 178
 179 /* This expression evaluates to true if the relocation is for a local
 180    object for which we still want to do the relocation at runtime.
 181    False if we are willing to perform this relocation while building
 182    the .o file.  GOTOFF does not need to be checked here because it is
 183    not pcrel.  I am not sure if some of the others are ever used with
 184    pcrel, but it is easier to be safe than sorry.  */
 185
 186 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 187   (!(FIX)->fx_pcrel                                     \
 188    || (FIX)->fx_plt                                     \
 189    || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT12           \
 190    || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32           \
 191    || (FIX)->fx_r_type == BFD_RELOC_32                  \
 192    || TC_FORCE_RELOCATION (FIX))
 193
 194 #define TC_CONS_FIX_NEW cons_fix_new_arm
 195  extern void cons_fix_new_arm PARAMS ((fragS *, int, int, expressionS *));
 196
 197 #ifdef OBJ_ELF
 198 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 199 #else
 200 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
 201 #endif
 202
 203 #ifdef OBJ_ELF
 204 #define DWARF2_LINE_MIN_INSN_LENGTH 2
 205 #endif
 206
 207 #define MAX_MEM_FOR_RS_ALIGN_CODE 31
 208
 209 /* For frags in code sections we need to record whether they contain
 210    ARM code or THUMB code.  This is that if they have to be aligned,
 211    they can contain the correct type of no-op instruction.  */
 212 #define TC_FRAG_TYPE    int
 213 #define TC_FRAG_INIT(fragp)     arm_init_frag (fragp)
 214 extern void arm_init_frag PARAMS ((struct frag *));
 215
 216 #define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
 217 extern void arm_handle_align PARAMS ((struct frag *));
 218
 219 #define md_do_align(N, FILL, LEN, MAX, LABEL)                                   \
 220   if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg))     \
 221     {                                                                           \
 222       arm_frag_align_code (N, MAX);                                             \
 223       goto LABEL;                                                               \
 224     }
 225 extern void arm_frag_align_code PARAMS ((int, int));