gas/config/tc-cris.h

   1 /* tc-cris.h -- Header file for tc-cris.c, the CRIS GAS port.
   2    Copyright 2000, 2001, 2002, 2003, 2004, 2005
   3    Free Software Foundation, Inc.
   4
   5    Contributed by Axis Communications AB, Lund, Sweden.
   6    Originally written for GAS 1.38.1 by Mikael Asker.
   7    Updates, BFDizing, GNUifying and ELF by Hans-Peter Nilsson.
   8
   9    This file is part of GAS, the GNU Assembler.
  10
  11    GAS is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2, or (at your option)
  14    any later version.
  15
  16    GAS is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with GAS; see the file COPYING.  If not, write to the
  23    Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
  24    MA 02110-1301, USA.  */
  25
  26 /* See the GAS "internal" document for general documentation on this.
  27    It is called internals.texi (internals.info when makeinfo:d), but is
  28    not installed or makeinfo:d by "make info".  */
  29
  30 /* Functions and variables that aren't declared in tc.h are declared here,
  31    with the type/prototype that is used in the local extern-declaration of
  32    their usage.  */
  33
  34 #ifndef TC_CRIS
  35 #define TC_CRIS
  36
  37 /* Multi-target support is always on.  */
  38 extern const char *cris_target_format (void);
  39 #define TARGET_FORMAT cris_target_format ()
  40
  41 #define TARGET_ARCH bfd_arch_cris
  42
  43 extern unsigned int cris_mach (void);
  44 #define TARGET_MACH (cris_mach ())
  45
  46 #define TARGET_BYTES_BIG_ENDIAN 0
  47
  48 extern const char *md_shortopts;
  49 extern struct option md_longopts[];
  50 extern size_t md_longopts_size;
  51
  52 extern const pseudo_typeS md_pseudo_table[];
  53
  54 #define tc_comment_chars cris_comment_chars
  55 extern const char cris_comment_chars[];
  56 extern const char line_comment_chars[];
  57 extern const char line_separator_chars[];
  58 extern const char EXP_CHARS[];
  59 extern const char FLT_CHARS[];
  60
  61 /* This should be optional, since it is ignored as an escape (assumed to
  62    be itself) if it is not recognized.  */
  63 #define ONLY_STANDARD_ESCAPES
  64
  65 /* Note that we do not define TC_EQUAL_IN_INSN, since its current use is
  66    in the instruction rather than the operand, and thus does not come to
  67    use for side-effect assignments such as "and.d [r0 = r1 + 42], r3".  */
  68 #define md_operand(x)
  69
  70 #define md_number_to_chars number_to_chars_littleendian
  71
  72 /* There's no use having different functions for this; the sizes are the
  73    same.  Note that we can't #define md_short_jump_size here.  */
  74 #define md_create_short_jump md_create_long_jump
  75
  76 extern const struct relax_type md_cris_relax_table[];
  77 #define TC_GENERIC_RELAX_TABLE md_cris_relax_table
  78
  79 long cris_relax_frag (segT, fragS *, long);
  80
  81 /* GAS only handles relaxations for pc-relative data targeting addresses
  82    in the same segment, so we have to handle the rest on our own.  */
  83 #define md_relax_frag(SEG, FRAGP, STRETCH)              \
  84  ((FRAGP)->fr_symbol != NULL                            \
  85   && S_GET_SEGMENT ((FRAGP)->fr_symbol) == (SEG)        \
  86   ? relax_frag (SEG, FRAGP, STRETCH)                    \
  87   : cris_relax_frag (SEG, FRAGP, STRETCH))
  88
  89 #define TC_FORCE_RELOCATION(FIX) md_cris_force_relocation (FIX)
  90 extern int md_cris_force_relocation (struct fix *);
  91
  92 #define IS_CRIS_PIC_RELOC(RTYPE)                        \
  93   ((RTYPE) == BFD_RELOC_CRIS_16_GOT                     \
  94    || (RTYPE) == BFD_RELOC_CRIS_32_GOT                  \
  95    || (RTYPE) == BFD_RELOC_CRIS_16_GOTPLT               \
  96    || (RTYPE) == BFD_RELOC_CRIS_32_GOTPLT               \
  97    || (RTYPE) == BFD_RELOC_CRIS_32_GOTREL               \
  98    || (RTYPE) == BFD_RELOC_CRIS_32_PLT_GOTREL           \
  99    || (RTYPE) == BFD_RELOC_CRIS_32_PLT_PCREL)
 100
 101 /* Make sure we don't resolve fixups for which we want to emit dynamic
 102    relocations.  FIXME: Set fx_plt instead of using IS_CRIS_PIC_RELOC.  */
 103 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 104   (!(FIX)->fx_pcrel                                     \
 105    || (FIX)->fx_plt                                     \
 106    || IS_CRIS_PIC_RELOC ((FIX)->fx_r_type)              \
 107    || TC_FORCE_RELOCATION (FIX))
 108
 109 /* For some reloc types, don't adjust fixups by reducing to a section
 110    symbol.  */
 111 #define tc_fix_adjustable(FIX)                          \
 112  ((FIX)->fx_r_type != BFD_RELOC_VTABLE_INHERIT          \
 113   && (FIX)->fx_r_type != BFD_RELOC_VTABLE_ENTRY         \
 114   && (! IS_CRIS_PIC_RELOC ((FIX)->fx_r_type)            \
 115       || (FIX)->fx_r_type == BFD_RELOC_CRIS_32_GOTREL))
 116
 117 /* FIXME: This *should* be a redundant definition, as the
 118    TC_FORCE_RELOCATION* definitions already told about the cases where
 119    we *don't* want the symbol value calculated.  Here we seem to answer
 120    the "are you sure" question.  It certainly has very little to do with
 121    whether the symbol value is passed to md_apply_fix.  */
 122 #define MD_APPLY_SYM_VALUE(FIX) 0
 123
 124 /* When we have fixups against constant expressions, we get a GAS-specific
 125    section symbol at no extra charge for obscure reasons in
 126    adjust_reloc_syms.  Since ELF outputs section symbols, it gladly
 127    outputs this "*ABS*" symbol in every object.  Avoid that.
 128    Also, don't emit undefined symbols (that aren't used in relocations).
 129    They pop up when tentatively parsing register names as symbols.  */
 130 #define tc_frob_symbol(symp, punt)                      \
 131  do {                                                   \
 132   if ((OUTPUT_FLAVOR == bfd_target_elf_flavour          \
 133        && (symp) == section_symbol (absolute_section))  \
 134       || ! S_IS_DEFINED (symp))                         \
 135     (punt) = 1;                                         \
 136  } while (0)
 137
 138 #define LISTING_HEADER "GAS for CRIS"
 139
 140 #if 0
 141 /* The testsuite does not let me define these, although they IMHO should
 142    be preferred over the default.  */
 143 #define LISTING_WORD_SIZE 2
 144 #define LISTING_LHS_WIDTH 4
 145 #define LISTING_LHS_WIDTH_SECOND 4
 146 #endif
 147
 148 /* END of declaration and definitions described in the "internals"
 149    document.  */
 150
 151 /* Do this, or we will never know what hit us when the
 152    broken-word-fixes break.  Do _not_ use WARN_SIGNED_OVERFLOW_WORD,
 153    it is only for use with WORKING_DOT_WORD and warns about most stuff.
 154    (still in 2.9.1).  */
 155 struct broken_word;
 156 extern void tc_cris_check_adjusted_broken_word (offsetT,
 157                                                 struct broken_word *);
 158 #define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \
 159  tc_cris_check_adjusted_broken_word ((offsetT) (new_offset), brokw)
 160
 161 /* We don't want any implicit alignment, so we do nothing.  */
 162 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) do { } while (0)
 163
 164 /* CRIS instructions, with operands and prefixes included, are a multiple
 165    of two bytes long.  */
 166 #define DWARF2_LINE_MIN_INSN_LENGTH 2
 167
 168 /* Make port immune to unwanted difference in te-generic.h vs. te-linux.h.  */
 169 #define LOCAL_LABELS_DOLLAR 1
 170
 171 #endif /* TC_CRIS */
 172 /*
 173  * Local variables:
 174  * eval: (c-set-style "gnu")
 175  * indent-tabs-mode: t
 176  * End:
 177  */