gas/config/tc-sparc.h

   1 /* tc-sparc.h - Macros and type defines for the sparc.
   2    Copyright (C) 1989, 90-96, 97, 98, 1999 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as
   8    published by the Free Software Foundation; either version 2,
   9    or (at your option) any later version.
  10
  11    GAS is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  14    the GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public
  17    License along with GAS; see the file COPYING.  If not, write
  18    to the Free Software Foundation, 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef TC_SPARC
  22 #define TC_SPARC 1
  23
  24 #ifdef ANSI_PROTOTYPES
  25 struct frag;
  26 #endif
  27
  28 /* This is used to set the default value for `target_big_endian'.  */
  29 #define TARGET_BYTES_BIG_ENDIAN 1
  30
  31 #define LOCAL_LABELS_FB 1
  32
  33 #define TARGET_ARCH bfd_arch_sparc
  34
  35 extern const char *sparc_target_format PARAMS ((void));
  36 #define TARGET_FORMAT sparc_target_format ()
  37
  38 #if 0
  39 #ifdef TE_SPARCAOUT
  40 /* Bi-endian support may eventually be unconditional, but until things are
  41    working well it's only provided for targets that need it.  */
  42 #define SPARC_BIENDIAN
  43 #endif
  44 #endif
  45 /* Make it unconditional and check if -EL is valid after option parsing */
  46 #define SPARC_BIENDIAN
  47
  48 #define WORKING_DOT_WORD
  49
  50 #define md_convert_frag(b,s,f)          {as_fatal (_("sparc convert_frag\n"));}
  51 #define md_estimate_size_before_relax(f,s) \
  52                         (as_fatal(_("estimate_size_before_relax called")),1)
  53
  54 #define LISTING_HEADER "SPARC GAS "
  55
  56 extern int sparc_pic_code;
  57
  58 #define md_do_align(n, fill, len, max, around)                          \
  59 if ((n) && (n) <= 10 && !need_pass_2 && !(fill)                         \
  60     && now_seg != data_section && now_seg != bss_section)               \
  61   {                                                                     \
  62     char *p;                                                            \
  63     p = frag_var (rs_align_code, 1 << n, 1, (relax_substateT) 1024,     \
  64                   (symbolS *) 0, (offsetT) (n), (char *) 0);            \
  65     *p = 0x00;                                                          \
  66     goto around;                                                        \
  67   }
  68
  69 /* We require .word, et. al., to be aligned correctly.  */
  70 #define md_cons_align(nbytes) sparc_cons_align (nbytes)
  71 extern void sparc_cons_align PARAMS ((int));
  72 #define HANDLE_ALIGN(fragp) sparc_handle_align (fragp)
  73 extern void sparc_handle_align PARAMS ((struct frag *));
  74
  75 #if defined (OBJ_ELF) || defined (OBJ_AOUT)
  76
  77 /* This expression evaluates to false if the relocation is for a local
  78    object for which we still want to do the relocation at runtime.
  79    True if we are willing to perform this relocation while building
  80    the .o file.
  81
  82    If the reloc is against an externally visible symbol, then the
  83    a.out assembler should not do the relocation if generating PIC, and
  84    the ELF assembler should never do the relocation.  */
  85
  86 #ifdef OBJ_ELF
  87 #define obj_relocate_extern 0
  88 #else
  89 #define obj_relocate_extern (! sparc_pic_code)
  90 #endif
  91
  92 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)  \
  93   (obj_relocate_extern \
  94    || (FIX)->fx_addsy == NULL \
  95    || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
  96        && ! S_IS_WEAK ((FIX)->fx_addsy) \
  97        && S_IS_DEFINED ((FIX)->fx_addsy) \
  98        && ! S_IS_COMMON ((FIX)->fx_addsy)))
  99 #endif
 100
 101 /* I know that "call 0" fails in sparc-coff if this doesn't return 1.  I
 102    don't know about other relocation types, or other formats, yet.  */
 103 #ifdef OBJ_COFF
 104 #define TC_FORCE_RELOCATION(FIXP)       \
 105         ((FIXP)->fx_r_type == BFD_RELOC_32_PCREL_S2 \
 106          && ((FIXP)->fx_addsy == 0 \
 107              || S_GET_SEGMENT ((FIXP)->fx_addsy) == absolute_section))
 108 #define RELOC_REQUIRES_SYMBOL
 109 #endif
 110
 111 #ifdef OBJ_ELF
 112 #define TC_FORCE_RELOCATION(fixp) elf32_sparc_force_relocation(fixp)
 113 extern int elf32_sparc_force_relocation PARAMS ((struct fix *));
 114 #endif
 115
 116 #define MD_APPLY_FIX3
 117 #define TC_HANDLES_FX_DONE
 118
 119 #ifdef OBJ_ELF
 120 /* Keep relocations against global symbols.  Don't turn them into
 121    relocations against sections.  This is required for the dynamic
 122    linker to operate properly.  When generating PIC, we need to keep
 123    any non PC relative reloc.  */
 124 #define tc_fix_adjustable(FIX)                                          \
 125   (! S_IS_EXTERNAL ((FIX)->fx_addsy)                                    \
 126    && ! S_IS_WEAK ((FIX)->fx_addsy)                                     \
 127    && (! sparc_pic_code                                                 \
 128        || (FIX)->fx_pcrel                                               \
 129        || ((FIX)->fx_subsy != NULL                                      \
 130            && (S_GET_SEGMENT ((FIX)->fx_subsy)                          \
 131                == S_GET_SEGMENT ((FIX)->fx_addsy)))                     \
 132        || strchr (S_GET_NAME ((FIX)->fx_addsy), '\001') != NULL         \
 133        || strchr (S_GET_NAME ((FIX)->fx_addsy), '\002') != NULL))
 134 #endif
 135
 136 #ifdef OBJ_AOUT
 137 /* When generating PIC code, we must not adjust any reloc which will
 138    turn into a reloc against the global offset table, nor any reloc
 139    which we will need if a symbol is overridden.  */
 140 #define tc_fix_adjustable(FIX)                                          \
 141   (! sparc_pic_code                                                     \
 142    || ((FIX)->fx_pcrel                                                  \
 143        && ((FIX)->fx_addsy == NULL                                      \
 144            || (! S_IS_EXTERNAL ((FIX)->fx_addsy)                        \
 145                && ! S_IS_WEAK ((FIX)->fx_addsy))))                      \
 146    || (FIX)->fx_r_type == BFD_RELOC_16                                  \
 147    || (FIX)->fx_r_type == BFD_RELOC_32)
 148 #endif
 149
 150 #define elf_tc_final_processing sparc_elf_final_processing
 151 extern void sparc_elf_final_processing PARAMS ((void));
 152
 153 #define md_operand(x)
 154
 155 extern void sparc_md_end PARAMS ((void));
 156 #define md_end() sparc_md_end ()
 157
 158 #endif
 159
 160 #define TC_CONS_FIX_NEW cons_fix_new_sparc
 161 extern void cons_fix_new_sparc
 162   PARAMS ((struct frag *, int, unsigned int, struct expressionS *));
 163
 164 /* end of tc-sparc.h */