gas/config/tc-sh.h

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