gas/config/tc-cris.h

   1 /* tc-cris.h -- Header file for tc-cris.c, the CRIS GAS port.
   2    Copyright 2000, 2001 Free Software Foundation, Inc.
   3
   4    Contributed by Axis Communications AB, Lund, Sweden.
   5    Originally written for GAS 1.38.1 by Mikael Asker.
   6    Updates, BFDizing, GNUifying and ELF by Hans-Peter Nilsson.
   7
   8    This file is part of GAS, the GNU Assembler.
   9
  10    GAS is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2, or (at your option)
  13    any later version.
  14
  15    GAS is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with GAS; see the file COPYING.  If not, write to the
  22    Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  23    MA 02111-1307, USA.  */
  24
  25 /* See the GAS "internal" document for general documentation on this.
  26    It is called internals.texi (internals.info when makeinfo:d), but is
  27    not installed or makeinfo:d by "make info".  */
  28
  29 /* Functions and variables that aren't declared in tc.h are declared here,
  30    with the type/prototype that is used in the local extern-declaration of
  31    their usage.  */
  32
  33 #ifndef TC_CRIS
  34 #define TC_CRIS
  35
  36 /* Multi-target support is always on.  */
  37 extern const char *cris_target_format PARAMS ((void));
  38 #define TARGET_FORMAT cris_target_format ()
  39
  40 #define TARGET_ARCH bfd_arch_cris
  41
  42 #define TARGET_BYTES_BIG_ENDIAN 0
  43
  44 extern const char *md_shortopts;
  45 extern struct option md_longopts[];
  46 extern size_t md_longopts_size;
  47
  48 extern const pseudo_typeS md_pseudo_table[];
  49
  50 #define tc_comment_chars cris_comment_chars
  51 extern const char cris_comment_chars[];
  52 extern const char line_comment_chars[];
  53 extern const char line_separator_chars[];
  54 extern const char EXP_CHARS[];
  55 extern const char FLT_CHARS[];
  56
  57 /* This should be optional, since it is ignored as an escape (assumed to
  58    be itself) if it is not recognized.  */
  59 #define ONLY_STANDARD_ESCAPES
  60
  61 /* Note that we do not define TC_EQUAL_IN_INSN, since its current use is
  62    in the instruction rather than the operand, and thus does not come to
  63    use for side-effect assignments such as "and.d [r0 = r1 + 42], r3".  */
  64 #define md_operand(x)
  65
  66 #define md_number_to_chars number_to_chars_littleendian
  67
  68 extern const int md_short_jump_size;
  69 extern const int md_long_jump_size;
  70
  71 /* There's no use having different functions for this; the sizes are the
  72    same.  Note that we can't #define md_short_jump_size here.  */
  73 #define md_create_short_jump md_create_long_jump
  74
  75 extern const struct relax_type md_cris_relax_table[];
  76 #define TC_GENERIC_RELAX_TABLE md_cris_relax_table
  77
  78 #define TC_HANDLES_FX_DONE
  79
  80 #define TC_FORCE_RELOCATION(fixp) md_cris_force_relocation (fixp)
  81 extern int md_cris_force_relocation PARAMS ((struct fix *));
  82
  83 #define MD_APPLY_FIX3
  84
  85 #define IS_CRIS_PIC_RELOC(X)                    \
  86   ((X) == BFD_RELOC_CRIS_16_GOT                 \
  87    || (X) == BFD_RELOC_CRIS_32_GOT              \
  88    || (X) == BFD_RELOC_CRIS_16_GOTPLT           \
  89    || (X) == BFD_RELOC_CRIS_32_GOTPLT           \
  90    || (X) == BFD_RELOC_CRIS_32_GOTREL           \
  91    || (X) == BFD_RELOC_CRIS_32_PLT_GOTREL       \
  92    || (X) == BFD_RELOC_CRIS_32_PLT_PCREL)
  93
  94
  95 /* FIXME: Undocumented macro.  Make sure we don't resolve fixups for which
  96    we want to emit dynamic relocations.  */
  97
  98 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)                           \
  99   ((FIX)->fx_addsy == NULL                                      \
 100    || (! S_IS_EXTERNAL ((FIX)->fx_addsy)                        \
 101        && ! S_IS_WEAK ((FIX)->fx_addsy)                         \
 102        && S_IS_DEFINED ((FIX)->fx_addsy)                        \
 103        && ! S_IS_COMMON ((FIX)->fx_addsy)                       \
 104        /* FIXME: Set fx_plt instead of this check.  */          \
 105        && ! IS_CRIS_PIC_RELOC ((FIX)->fx_r_type)))
 106
 107 /* This is really a workaround for a bug in write.c that resolves relocs
 108    for weak symbols - it should be postponed to the link stage or later.
 109    Also don't adjust fixups for global symbols for ELF, and no relocs
 110    where the original symbol name must be kept.  */
 111 #define tc_fix_adjustable(X)                                    \
 112  (((X)->fx_addsy == NULL                                        \
 113    || (! S_IS_WEAK ((X)->fx_addsy)                              \
 114        && ! (OUTPUT_FLAVOR == bfd_target_elf_flavour            \
 115              && S_IS_EXTERNAL ((X)->fx_addsy))))                \
 116   && (X)->fx_r_type != BFD_RELOC_VTABLE_INHERIT                 \
 117   && (X)->fx_r_type != BFD_RELOC_VTABLE_ENTRY                   \
 118   && (! IS_CRIS_PIC_RELOC ((X)->fx_r_type)                      \
 119       || (X)->fx_r_type == BFD_RELOC_CRIS_32_GOTREL))
 120
 121 /* When we have fixups against constant expressions, we get a GAS-specific
 122    section symbol at no extra charge for obscure reasons in
 123    adjust_reloc_syms.  Since ELF outputs section symbols, it gladly
 124    outputs this "*ABS*" symbol in every object.  Avoid that.
 125    Also, don't emit undefined symbols (that aren't used in relocations).
 126    They pop up when tentatively parsing register names as symbols.  */
 127 #define tc_frob_symbol(symp, punt)                      \
 128  do {                                                   \
 129   if ((OUTPUT_FLAVOR == bfd_target_elf_flavour          \
 130        && (symp) == section_symbol (absolute_section))  \
 131       || ! S_IS_DEFINED (symp))                         \
 132     (punt) = 1;                                         \
 133  } while (0)
 134
 135 #define LISTING_HEADER "GAS for CRIS"
 136
 137 #if 0
 138 /* The testsuite does not let me define these, although they IMHO should
 139    be preferred over the default.  */
 140 #define LISTING_WORD_SIZE 2
 141 #define LISTING_LHS_WIDTH 4
 142 #define LISTING_LHS_WIDTH_SECOND 4
 143 #endif
 144
 145 /* END of declaration and definitions described in the "internals"
 146    document.  */
 147
 148 /* Do this, or we will never know what hit us when the
 149    broken-word-fixes break.  Do _not_ use WARN_SIGNED_OVERFLOW_WORD,
 150    it is only for use with WORKING_DOT_WORD and warns about most stuff.
 151    (still in 2.9.1).  */
 152 struct broken_word;
 153 extern void tc_cris_check_adjusted_broken_word PARAMS ((offsetT,
 154                                                         struct
 155                                                         broken_word *));
 156 #define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \
 157  tc_cris_check_adjusted_broken_word ((offsetT) (new_offset), brokw)
 158
 159 /* We don't want any implicit alignment, so we do nothing.  */
 160 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR)
 161
 162 /* CRIS instructions, with operands and prefixes included, are a multiple
 163    of two bytes long.  */
 164 #define DWARF2_LINE_MIN_INSN_LENGTH 2
 165
 166 #endif /* TC_CRIS */
 167 /*
 168  * Local variables:
 169  * eval: (c-set-style "gnu")
 170  * indent-tabs-mode: t
 171  * End:
 172  */