gas/config/tc-mn10300.h

   1 /* tc-mn10300.h -- Header file for tc-mn10300.c.
   2    Copyright 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
   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 3, 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 the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #define TC_MN10300
  23
  24 #define TARGET_BYTES_BIG_ENDIAN 0
  25
  26 #define DIFF_EXPR_OK
  27 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
  28
  29 #define TC_FORCE_RELOCATION(FIX) mn10300_force_relocation (FIX)
  30 extern bfd_boolean mn10300_force_relocation (struct fix *);
  31
  32 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
  33   (!(FIX)->fx_pcrel                                     \
  34    || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL        \
  35    || (FIX)->fx_r_type == BFD_RELOC_MN10300_GOT32       \
  36    || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL        \
  37    || TC_FORCE_RELOCATION (FIX))
  38
  39 #define md_parse_name(NAME, EXPRP, MODE, NEXTCHARP) \
  40     mn10300_parse_name ((NAME), (EXPRP), (MODE), (NEXTCHARP))
  41 int mn10300_parse_name (char const *, expressionS *, enum expr_mode, char *);
  42
  43 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \
  44      mn10300_cons_fix_new ((FRAG), (OFF), (LEN), (EXP))
  45 void mn10300_cons_fix_new (fragS *, int, int, expressionS *);
  46
  47 /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT
  48    symbols.  The relocation type is stored in X_md.  */
  49 #define O_PIC_reloc O_md1
  50
  51 /* The target BFD architecture.  */
  52 #define TARGET_ARCH bfd_arch_mn10300
  53
  54 #ifdef TE_LINUX
  55 #define TARGET_FORMAT "elf32-am33lin"
  56 #else
  57 #define TARGET_FORMAT "elf32-mn10300"
  58 #endif
  59
  60
  61 /* Do not adjust relocations involving symbols in code sections,
  62    because it breaks linker relaxations.  This could be fixed in the
  63    linker, but this fix is simpler, and it pretty much only affects
  64    object size a little bit.  */
  65 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC)  \
  66   (((SEC)->flags & SEC_CODE) != 0               \
  67    || ! SEG_NORMAL (SEC)                        \
  68    || (FIX)->fx_r_type == BFD_RELOC_MN10300_ALIGN \
  69    || TC_FORCE_RELOCATION (FIX))
  70
  71 /* We validate subtract arguments within tc_gen_reloc(), so don't
  72    report errors at this point.  */
  73 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
  74
  75 /* Fixup debug sections since we will never relax them.  Ideally, we
  76    could do away with this and instead check every single fixup with
  77    TC_FORCE_RELOCATION and TC_FORCE_RELOCATION_SUB_NAME, verifying
  78    that the sections of the referenced symbols (and not the sections
  79    in which the fixup appears) may be subject to relaxation.  We'd
  80    still have to check the section in which the fixup appears, because
  81    we want to do some simplifications in debugging info that might
  82    break in real code.
  83
  84    Using the infrastructure in write.c to simplify subtraction fixups
  85    would enable us to remove a lot of code from tc_gen_reloc(), but
  86    this is simpler, faster, and produces almost the same effect.
  87    Also, in the macros above, we can't check whether the fixup is in a
  88    debugging section or not, so we have to use this for now.  */
  89 #define TC_LINKRELAX_FIXUP(seg) (seg->flags & SEC_ALLOC)
  90
  91 #define md_operand(x)
  92
  93 /* Permit temporary numeric labels.  */
  94 #define LOCAL_LABELS_FB 1
  95
  96 /* We don't need to handle .word strangely.  */
  97 #define WORKING_DOT_WORD
  98
  99 #define md_number_to_chars number_to_chars_littleendian
 100
 101 #define tc_fix_adjustable(FIX) mn10300_fix_adjustable (FIX)
 102 extern bfd_boolean mn10300_fix_adjustable (struct fix *);
 103
 104 /* We do relaxing in the assembler as well as the linker.  */
 105 extern const struct relax_type md_relax_table[];
 106 #define TC_GENERIC_RELAX_TABLE md_relax_table
 107
 108 #define DWARF2_LINE_MIN_INSN_LENGTH 1
 109
 110 /* The difference between same-section symbols may be affected by linker
 111    relaxation, so do not resolve such expressions in the assembler.  */
 112 #define md_allow_local_subtract(l,r,s) mn10300_allow_local_subtract (l, r, s)
 113 extern bfd_boolean mn10300_allow_local_subtract (expressionS *, expressionS *, segT);
 114
 115 #define RELOC_EXPANSION_POSSIBLE
 116 #define MAX_RELOC_EXPANSION 2
 117
 118 #define TC_FRAG_TYPE bfd_boolean
 119
 120 #define HANDLE_ALIGN(frag) mn10300_handle_align (frag)
 121 extern void mn10300_handle_align (fragS *);
 122
 123 /* Only allow call frame debug info optimization when linker relaxation is
 124    not enabled as otherwise we could generate the DWARF directives without
 125    the relocs necessary to patch them up.  */
 126 #define md_allow_eh_opt (linkrelax == 0)