gas/config/tc-sh.h

   1 /* This file is tc-sh.h
   2    Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
   3    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 published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to
  19    the Free Software Foundation, 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #define TC_SH
  23
  24 #define TARGET_BYTES_BIG_ENDIAN 0
  25
  26 #define TARGET_ARCH bfd_arch_sh
  27
  28 #if ANSI_PROTOTYPES
  29 struct segment_info_struct;
  30 struct internal_reloc;
  31 #endif
  32
  33 /* Whether in little endian mode.  */
  34 extern int shl;
  35
  36 /* Whether -relax was used.  */
  37 extern int sh_relax;
  38
  39 /* Whether -small was used.  */
  40 extern int sh_small;
  41
  42 /* Don't try to break words.  */
  43 #define WORKING_DOT_WORD
  44
  45 /* All SH instructions are multiples of 16 bits.  */
  46 #define DWARF2_LINE_MIN_INSN_LENGTH 2
  47
  48 /* We require .long, et. al., to be aligned correctly.  */
  49 #define md_cons_align(nbytes) sh_cons_align (nbytes)
  50 extern void sh_cons_align PARAMS ((int));
  51
  52 /* When relaxing, we need to generate relocations for alignment
  53    directives.  */
  54 #define HANDLE_ALIGN(frag) sh_handle_align (frag)
  55 extern void sh_handle_align PARAMS ((fragS *));
  56
  57 #define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2)
  58
  59 /* We need to force out some relocations when relaxing.  */
  60 #define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix)
  61 extern int sh_force_relocation ();
  62
  63 #ifdef OBJ_ELF
  64 #define obj_fix_adjustable(fixP) sh_fix_adjustable(fixP)
  65 struct fix;
  66 extern boolean sh_fix_adjustable PARAMS ((struct fix *));
  67
  68 /* This arranges for gas/write.c to not apply a relocation if
  69    obj_fix_adjustable() says it is not adjustable.  */
  70 #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP)
  71 #endif
  72
  73 #define IGNORE_NONSTANDARD_ESCAPES
  74
  75 #define LISTING_HEADER (shl ? "Hitachi Super-H GAS Little Endian" : "Hitachi Super-H GAS Big Endian")
  76
  77 #define md_operand(x)
  78
  79 extern const struct relax_type md_relax_table[];
  80 #define TC_GENERIC_RELAX_TABLE md_relax_table
  81
  82 /* We record, for each section, whether we have most recently output a
  83    CODE reloc or a DATA reloc.  */
  84 struct sh_segment_info_type
  85 {
  86   int in_code : 1;
  87 };
  88 #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type
  89
  90 /* We call a routine to emit a reloc for a label, so that the linker
  91    can align loads and stores without crossing a label.  */
  92 extern void sh_frob_label PARAMS ((void));
  93 #define tc_frob_label(sym) sh_frob_label ()
  94
  95 /* We call a routine to flush pending output in order to output a DATA
  96    reloc when required.  */
  97 extern void sh_flush_pending_output PARAMS ((void));
  98 #define md_flush_pending_output() sh_flush_pending_output ()
  99
 100 #ifdef BFD_ASSEMBLER
 101 #define tc_frob_file_before_adjust sh_frob_file
 102 #else
 103 #define tc_frob_file sh_frob_file
 104 #endif
 105 extern void sh_frob_file PARAMS ((void));
 106
 107 #ifdef OBJ_COFF
 108 /* COFF specific definitions.  */
 109
 110 #define DO_NOT_STRIP 0
 111
 112 /* This macro translates between an internal fix and an coff reloc type */
 113 #define TC_COFF_FIX2RTYPE(fix) ((fix)->fx_r_type)
 114
 115 #define BFD_ARCH TARGET_ARCH
 116
 117 #define COFF_MAGIC (shl ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG)
 118
 119 /* We need to write out relocs which have not been completed.  */
 120 #define TC_COUNT_RELOC(fix) ((fix)->fx_addsy != NULL)
 121
 122 #define TC_RELOC_MANGLE(seg, fix, int, paddr) \
 123   sh_coff_reloc_mangle ((seg), (fix), (int), (paddr))
 124 extern void sh_coff_reloc_mangle
 125   PARAMS ((struct segment_info_struct *, struct fix *,
 126            struct internal_reloc *, unsigned int));
 127
 128 #define tc_coff_symbol_emit_hook(a) ; /* not used */
 129
 130 #define NEED_FX_R_TYPE 1
 131
 132 #define TC_KEEP_FX_OFFSET 1
 133
 134 #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
 135 extern int tc_coff_sizemachdep PARAMS ((fragS *));
 136
 137 #ifdef BFD_ASSEMBLER
 138 #define SEG_NAME(SEG) segment_name (SEG)
 139 #else
 140 #define SEG_NAME(SEG) obj_segment_name (SEG)
 141 #endif
 142
 143 /* We align most sections to a 16 byte boundary.  */
 144 #define SUB_SEGMENT_ALIGN(SEG)                          \
 145   (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0         \
 146    ? 0                                                  \
 147    : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0        \
 148        || strcmp (SEG_NAME (SEG), ".ctors") == 0        \
 149        || strcmp (SEG_NAME (SEG), ".dtors") == 0)       \
 150       ? 2                                               \
 151       : (sh_small ? 2 : 4)))
 152
 153 #endif /* OBJ_COFF */
 154
 155 #ifdef OBJ_ELF
 156 /* ELF specific definitions.  */
 157
 158 /* Whether or not the target is big endian */
 159 extern int target_big_endian;
 160
 161 #ifdef TE_LINUX
 162 #define TARGET_FORMAT (shl ? "elf32-sh-linux" : "elf32-shbig-linux")
 163 #else
 164 #define TARGET_FORMAT (shl ? "elf32-shl" : "elf32-sh")
 165 #endif
 166
 167 #define elf_tc_final_processing sh_elf_final_processing
 168 extern void sh_elf_final_processing PARAMS ((void));
 169
 170 #define DIFF_EXPR_OK            /* foo-. gets turned into PC relative relocs */
 171
 172 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 173
 174 /* This is the relocation type for direct references to
 175    GLOBAL_OFFSET_TABLE.  It comes up in complicated expressions such
 176    as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed
 177    normally with the regular expressions.  The fixup specified here
 178    when used at runtime implies that we should add the address of the
 179    GOT to the specified location, and as a result we have simplified
 180    the expression into something we can use.  */
 181 #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC
 182
 183 /* This expression evaluates to false if the relocation is for a local object
 184    for which we still want to do the relocation at runtime.  True if we
 185    are willing to perform this relocation while building the .o file.
 186    This is only used for pcrel relocations, so GOTOFF does not need to be
 187    checked here.  I am not sure if some of the others are ever used with
 188    pcrel, but it is easier to be safe than sorry.
 189
 190    We can't resolve references to the GOT or the PLT when creating the
 191    object file, since these tables are only created by the linker.
 192    Also, if the symbol is global, weak, common or not defined, the
 193    assembler can't compute the appropriate reloc, since its location
 194    can only be determined at link time.  */
 195
 196 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)                           \
 197   ((FIX)->fx_r_type != BFD_RELOC_32_PLT_PCREL                   \
 198    && (FIX)->fx_r_type != BFD_RELOC_32_GOT_PCREL                \
 199    && (FIX)->fx_r_type != BFD_RELOC_SH_GOTPC                    \
 200    && ((FIX)->fx_addsy == NULL                                  \
 201        || (! S_IS_EXTERNAL ((FIX)->fx_addsy)                    \
 202            && ! S_IS_WEAK ((FIX)->fx_addsy)                     \
 203            && S_IS_DEFINED ((FIX)->fx_addsy)                    \
 204            && ! S_IS_COMMON ((FIX)->fx_addsy))))
 205
 206 #endif /* OBJ_ELF */