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_ARCH bfd_arch_sh
  25
  26 #if ANSI_PROTOTYPES
  27 struct segment_info_struct;
  28 struct internal_reloc;
  29 #endif
  30
  31 /* Whether -relax was used.  */
  32 extern int sh_relax;
  33
  34 /* Whether -small was used.  */
  35 extern int sh_small;
  36
  37 /* Don't try to break words.  */
  38 #define WORKING_DOT_WORD
  39
  40 /* All SH instructions are multiples of 16 bits.  */
  41 #define DWARF2_LINE_MIN_INSN_LENGTH 2
  42
  43 /* We require .long, et. al., to be aligned correctly.  */
  44 #define md_cons_align(nbytes) sh_cons_align (nbytes)
  45 extern void sh_cons_align PARAMS ((int));
  46
  47 /* When relaxing, we need to generate relocations for alignment
  48    directives.  */
  49 #define HANDLE_ALIGN(frag) sh_handle_align (frag)
  50 extern void sh_handle_align PARAMS ((fragS *));
  51
  52 #define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2)
  53
  54 /* We need to force out some relocations when relaxing.  */
  55 #define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix)
  56
  57 /* The type fixS is defined (to struct fix) in write.h, but write.h uses
  58    definitions from this file.  To avoid problems with including write.h
  59    after the "right" definitions, don't; just forward-declare struct fix
  60    here.  */
  61 struct fix;
  62 extern int sh_force_relocation PARAMS ((struct fix *));
  63
  64 #ifdef OBJ_ELF
  65 #define obj_fix_adjustable(fixP) sh_fix_adjustable(fixP)
  66 struct fix;
  67 extern boolean sh_fix_adjustable PARAMS ((struct fix *));
  68
  69 /* This arranges for gas/write.c to not apply a relocation if
  70    obj_fix_adjustable() says it is not adjustable.  */
  71 #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP)
  72 #endif
  73
  74 #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section (FIXP, SEC)
  75 extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
  76
  77 #define IGNORE_NONSTANDARD_ESCAPES
  78
  79 #define LISTING_HEADER \
  80   (!target_big_endian \
  81    ? "Hitachi Super-H GAS Little Endian" : "Hitachi Super-H GAS Big Endian")
  82
  83 #define md_operand(x)
  84
  85 extern const struct relax_type md_relax_table[];
  86 #define TC_GENERIC_RELAX_TABLE md_relax_table
  87
  88 /* We record, for each section, whether we have most recently output a
  89    CODE reloc or a DATA reloc.  */
  90 struct sh_segment_info_type
  91 {
  92   int in_code : 1;
  93 };
  94 #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type
  95
  96 /* We call a routine to emit a reloc for a label, so that the linker
  97    can align loads and stores without crossing a label.  */
  98 extern void sh_frob_label PARAMS ((void));
  99 #define tc_frob_label(sym) sh_frob_label ()
 100
 101 /* We call a routine to flush pending output in order to output a DATA
 102    reloc when required.  */
 103 extern void sh_flush_pending_output PARAMS ((void));
 104 #define md_flush_pending_output() sh_flush_pending_output ()
 105
 106 #ifdef BFD_ASSEMBLER
 107 #define tc_frob_file_before_adjust sh_frob_file
 108 #else
 109 #define tc_frob_file sh_frob_file
 110 #endif
 111 extern void sh_frob_file PARAMS ((void));
 112
 113 #ifdef OBJ_COFF
 114 /* COFF specific definitions.  */
 115
 116 #define DO_NOT_STRIP 0
 117
 118 /* This macro translates between an internal fix and an coff reloc type */
 119 #define TC_COFF_FIX2RTYPE(fix) ((fix)->fx_r_type)
 120
 121 #define BFD_ARCH TARGET_ARCH
 122
 123 #define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG)
 124
 125 /* We need to write out relocs which have not been completed.  */
 126 #define TC_COUNT_RELOC(fix) ((fix)->fx_addsy != NULL)
 127
 128 #define TC_RELOC_MANGLE(seg, fix, int, paddr) \
 129   sh_coff_reloc_mangle ((seg), (fix), (int), (paddr))
 130 extern void sh_coff_reloc_mangle
 131   PARAMS ((struct segment_info_struct *, struct fix *,
 132            struct internal_reloc *, unsigned int));
 133
 134 #define tc_coff_symbol_emit_hook(a) ; /* not used */
 135
 136 #define NEED_FX_R_TYPE 1
 137
 138 #define TC_KEEP_FX_OFFSET 1
 139
 140 #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
 141 extern int tc_coff_sizemachdep PARAMS ((fragS *));
 142
 143 #ifdef BFD_ASSEMBLER
 144 #define SEG_NAME(SEG) segment_name (SEG)
 145 #else
 146 #define SEG_NAME(SEG) obj_segment_name (SEG)
 147 #endif
 148
 149 /* We align most sections to a 16 byte boundary.  */
 150 #define SUB_SEGMENT_ALIGN(SEG)                          \
 151   (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0         \
 152    ? 0                                                  \
 153    : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0        \
 154        || strcmp (SEG_NAME (SEG), ".ctors") == 0        \
 155        || strcmp (SEG_NAME (SEG), ".dtors") == 0)       \
 156       ? 2                                               \
 157       : (sh_small ? 2 : 4)))
 158
 159 #endif /* OBJ_COFF */
 160
 161 #ifdef OBJ_ELF
 162 /* ELF specific definitions.  */
 163
 164 /* Whether or not the target is big endian */
 165 extern int target_big_endian;
 166
 167 #ifdef TE_LINUX
 168 #define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux")
 169 #else
 170 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh")
 171 #endif
 172
 173 #define elf_tc_final_processing sh_elf_final_processing
 174 extern void sh_elf_final_processing PARAMS ((void));
 175
 176 #define DIFF_EXPR_OK            /* foo-. gets turned into PC relative relocs */
 177
 178 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 179
 180 /* This is the relocation type for direct references to
 181    GLOBAL_OFFSET_TABLE.  It comes up in complicated expressions such
 182    as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed
 183    normally with the regular expressions.  The fixup specified here
 184    when used at runtime implies that we should add the address of the
 185    GOT to the specified location, and as a result we have simplified
 186    the expression into something we can use.  */
 187 #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC
 188
 189 /* This expression evaluates to false if the relocation is for a local object
 190    for which we still want to do the relocation at runtime.  True if we
 191    are willing to perform this relocation while building the .o file.
 192    This is only used for pcrel relocations, so GOTOFF does not need to be
 193    checked here.  I am not sure if some of the others are ever used with
 194    pcrel, but it is easier to be safe than sorry.
 195
 196    We can't resolve references to the GOT or the PLT when creating the
 197    object file, since these tables are only created by the linker.
 198    Also, if the symbol is global, weak, common or not defined, the
 199    assembler can't compute the appropriate reloc, since its location
 200    can only be determined at link time.  */
 201
 202 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)                           \
 203   ((FIX)->fx_r_type != BFD_RELOC_32_PLT_PCREL                   \
 204    && (FIX)->fx_r_type != BFD_RELOC_32_GOT_PCREL                \
 205    && (FIX)->fx_r_type != BFD_RELOC_SH_GOTPC                    \
 206    && ((FIX)->fx_addsy == NULL                                  \
 207        || (! S_IS_EXTERNAL ((FIX)->fx_addsy)                    \
 208            && ! S_IS_WEAK ((FIX)->fx_addsy)                     \
 209            && S_IS_DEFINED ((FIX)->fx_addsy)                    \
 210            && ! S_IS_COMMON ((FIX)->fx_addsy))))
 211
 212 #endif /* OBJ_ELF */