gas/config/tc-sparc.h

   1 /* tc-sparc.h - Macros and type defines for the sparc.
   2    Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000, 2001 Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as
   9    published by the Free Software Foundation; either version 2,
  10    or (at your option) any later version.
  11
  12    GAS is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15    the GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public
  18    License along with GAS; see the file COPYING.  If not, write
  19    to the Free Software Foundation, 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef TC_SPARC
  23 #define TC_SPARC 1
  24
  25 #ifdef ANSI_PROTOTYPES
  26 struct frag;
  27 #endif
  28
  29 /* This is used to set the default value for `target_big_endian'.  */
  30 #define TARGET_BYTES_BIG_ENDIAN 1
  31
  32 #define LOCAL_LABELS_FB 1
  33
  34 #define TARGET_ARCH bfd_arch_sparc
  35
  36 extern const char *sparc_target_format PARAMS ((void));
  37 #define TARGET_FORMAT sparc_target_format ()
  38
  39 #define RELOC_EXPANSION_POSSIBLE
  40 #define MAX_RELOC_EXPANSION 2
  41
  42 #if 0
  43 #ifdef TE_SPARCAOUT
  44 /* Bi-endian support may eventually be unconditional, but until things are
  45    working well it's only provided for targets that need it.  */
  46 #define SPARC_BIENDIAN
  47 #endif
  48 #endif
  49 /* Make it unconditional and check if -EL is valid after option parsing */
  50 #define SPARC_BIENDIAN
  51
  52 #define WORKING_DOT_WORD
  53
  54 #define md_convert_frag(b,s,f) \
  55   as_fatal (_("sparc convert_frag\n"))
  56 #define md_estimate_size_before_relax(f,s) \
  57   (as_fatal (_("estimate_size_before_relax called")), 1)
  58
  59 #define LISTING_HEADER "SPARC GAS "
  60
  61 extern int sparc_pic_code;
  62
  63 /* We require .word, et. al., to be aligned correctly.  */
  64 #define md_cons_align(nbytes) sparc_cons_align (nbytes)
  65 extern void sparc_cons_align PARAMS ((int));
  66
  67 #define HANDLE_ALIGN(fragp) sparc_handle_align (fragp)
  68 extern void sparc_handle_align PARAMS ((struct frag *));
  69
  70 #define MAX_MEM_FOR_RS_ALIGN_CODE  (3 + 4 + 4)
  71
  72 #if defined (OBJ_ELF) || defined (OBJ_AOUT)
  73
  74 /* This expression evaluates to false if the relocation is for a local
  75    object for which we still want to do the relocation at runtime.
  76    True if we are willing to perform this relocation while building
  77    the .o file.
  78
  79    If the reloc is against an externally visible symbol, then the
  80    a.out assembler should not do the relocation if generating PIC, and
  81    the ELF assembler should never do the relocation.  */
  82
  83 #ifdef OBJ_ELF
  84 #define obj_relocate_extern 0
  85 #else
  86 #define obj_relocate_extern (! sparc_pic_code)
  87 #endif
  88
  89 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)  \
  90   (obj_relocate_extern \
  91    || (FIX)->fx_addsy == NULL \
  92    || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
  93        && ! S_IS_WEAK ((FIX)->fx_addsy) \
  94        && S_IS_DEFINED ((FIX)->fx_addsy) \
  95        && ! S_IS_COMMON ((FIX)->fx_addsy)))
  96 #endif
  97
  98 /* I know that "call 0" fails in sparc-coff if this doesn't return 1.  I
  99    don't know about other relocation types, or other formats, yet.  */
 100 #ifdef OBJ_COFF
 101 #define TC_FORCE_RELOCATION(FIXP)       \
 102         ((FIXP)->fx_r_type == BFD_RELOC_32_PCREL_S2 \
 103          && ((FIXP)->fx_addsy == 0 \
 104              || S_GET_SEGMENT ((FIXP)->fx_addsy) == absolute_section))
 105 #define RELOC_REQUIRES_SYMBOL
 106 #endif
 107
 108 #ifdef OBJ_ELF
 109 #define TC_FORCE_RELOCATION(fixp) elf32_sparc_force_relocation(fixp)
 110 extern int elf32_sparc_force_relocation PARAMS ((struct fix *));
 111 #endif
 112
 113 #ifdef OBJ_ELF
 114 /* Keep relocations against global symbols.  Don't turn them into
 115    relocations against sections.  This is required for the dynamic
 116    linker to operate properly.  When generating PIC, we need to keep
 117    any non PC relative reloc.  The PIC part of this test must be
 118    parallel to the code in tc_gen_reloc which converts relocations to
 119    GOT relocations.  */
 120 #define tc_fix_adjustable(FIX)                                          \
 121   (! S_IS_EXTERNAL ((FIX)->fx_addsy)                                    \
 122    && ! S_IS_WEAK ((FIX)->fx_addsy)                                     \
 123    && (FIX)->fx_r_type != BFD_RELOC_VTABLE_INHERIT                      \
 124    && (FIX)->fx_r_type != BFD_RELOC_VTABLE_ENTRY                        \
 125    && (! sparc_pic_code                                                 \
 126        || ((FIX)->fx_r_type != BFD_RELOC_HI22                           \
 127            && (FIX)->fx_r_type != BFD_RELOC_LO10                        \
 128            && (FIX)->fx_r_type != BFD_RELOC_SPARC13                     \
 129            && ((FIX)->fx_r_type != BFD_RELOC_32_PCREL_S2                \
 130                || (S_IS_DEFINED ((FIX)->fx_addsy)                       \
 131                    && ! S_IS_COMMON ((FIX)->fx_addsy)                   \
 132                    && ! S_IS_EXTERNAL ((FIX)->fx_addsy)                 \
 133                    && ! S_IS_WEAK ((FIX)->fx_addsy)))                   \
 134            && ((FIX)->fx_pcrel                                          \
 135                || ((FIX)->fx_subsy != NULL                              \
 136                    && (S_GET_SEGMENT ((FIX)->fx_subsy)                  \
 137                        == S_GET_SEGMENT ((FIX)->fx_addsy)))             \
 138                || S_IS_LOCAL ((FIX)->fx_addsy)))))
 139
 140 /* Finish up the entire symtab.  */
 141 #define tc_adjust_symtab() sparc_adjust_symtab ()
 142 extern void sparc_adjust_symtab PARAMS ((void));
 143 #endif
 144
 145 #ifdef OBJ_AOUT
 146 /* When generating PIC code, we must not adjust any reloc which will
 147    turn into a reloc against the global offset table, nor any reloc
 148    which we will need if a symbol is overridden.  */
 149 #define tc_fix_adjustable(FIX)                                          \
 150   (! sparc_pic_code                                                     \
 151    || ((FIX)->fx_pcrel                                                  \
 152        && ((FIX)->fx_addsy == NULL                                      \
 153            || (! S_IS_EXTERNAL ((FIX)->fx_addsy)                        \
 154                && ! S_IS_WEAK ((FIX)->fx_addsy))))                      \
 155    || (FIX)->fx_r_type == BFD_RELOC_16                                  \
 156    || (FIX)->fx_r_type == BFD_RELOC_32)
 157 #endif
 158
 159 #define elf_tc_final_processing sparc_elf_final_processing
 160 extern void sparc_elf_final_processing PARAMS ((void));
 161
 162 #define md_operand(x)
 163
 164 extern void sparc_md_end PARAMS ((void));
 165 #define md_end() sparc_md_end ()
 166
 167 #endif
 168
 169 #define TC_CONS_FIX_NEW cons_fix_new_sparc
 170 extern void cons_fix_new_sparc
 171   PARAMS ((struct frag *, int, unsigned int, struct expressionS *));
 172
 173 #define TC_FIX_TYPE     valueT
 174
 175 #define TC_INIT_FIX_DATA(X)                     \
 176   do                                            \
 177      {                                          \
 178        (X)->tc_fix_data = 0;                    \
 179      }                                          \
 180   while (0)
 181
 182 #define TC_FIX_DATA_PRINT(FILE, FIXP)                                   \
 183   do                                                                    \
 184     {                                                                   \
 185       fprintf ((FILE), "addend2=%ld\n",                                 \
 186               (unsigned long) (FIXP)->tc_fix_data);                     \
 187     }                                                                   \
 188   while (0)
 189
 190 #define DWARF2_LINE_MIN_INSN_LENGTH 4
 191
 192 /* end of tc-sparc.h */