gas/config/tc-crx.h

   1 /* tc-crx.h -- Header file for tc-crx.c, the CRX GAS port.
   2    Copyright 2004, 2007 Free Software Foundation, Inc.
   3
   4    Contributed by Tomer Levi, NSC, Israel.
   5    Originally written for GAS 2.12 by Tomer Levi, NSC, Israel.
   6    Updates, BFDizing, GNUifying and ELF support by Tomer Levi.
   7
   8    This file is part of GAS, the GNU Assembler.
   9
  10    GAS is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3, or (at your option)
  13    any later version.
  14
  15    GAS is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with GAS; see the file COPYING.  If not, write to the
  22    Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
  23    MA 02110-1301, USA.  */
  24
  25 #ifndef TC_CRX_H
  26 #define TC_CRX_H
  27
  28 #define TC_CRX 1
  29
  30 #define TARGET_BYTES_BIG_ENDIAN 0
  31
  32 #define TARGET_FORMAT "elf32-crx"
  33 #define TARGET_ARCH   bfd_arch_crx
  34
  35 #define WORKING_DOT_WORD
  36 #define LOCAL_LABEL_PREFIX '.'
  37
  38 #define md_undefined_symbol(s)  0
  39 #define md_number_to_chars      number_to_chars_littleendian
  40
  41 /* We do relaxing in the assembler as well as the linker.  */
  42 extern const struct relax_type md_relax_table[];
  43 #define TC_GENERIC_RELAX_TABLE md_relax_table
  44
  45 /* We do not want to adjust any relocations to make implementation of
  46    linker relaxations easier.  */
  47 #define tc_fix_adjustable(fixP) 0
  48
  49 /* We need to force out some relocations when relaxing.  */
  50 #define TC_FORCE_RELOCATION(FIXP) crx_force_relocation (FIXP)
  51 extern int crx_force_relocation (struct fix *);
  52
  53 /* Fixup debug sections since we will never relax them.  */
  54 #define TC_LINKRELAX_FIXUP(seg) (seg->flags & SEC_ALLOC)
  55
  56 /* CRX instructions, with operands included, are a multiple
  57    of two bytes long.  */
  58 #define DWARF2_LINE_MIN_INSN_LENGTH 2
  59
  60 /* This is called by emit_expr when creating a reloc for a cons.
  61    We could use the definition there, except that we want to handle
  62    the CRX reloc type specially, rather than the BFD_RELOC type.  */
  63 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \
  64       fix_new_exp (FRAG, OFF, (int) LEN, EXP, 0, \
  65         LEN == 1 ? BFD_RELOC_CRX_NUM8 \
  66         : LEN == 2 ? BFD_RELOC_CRX_NUM16 \
  67         : LEN == 4 ? BFD_RELOC_CRX_NUM32 \
  68         : BFD_RELOC_NONE);
  69
  70 /* Give an error if a frag containing code is not aligned to a 2-byte
  71    boundary.  */
  72 #define md_frag_check(FRAGP) \
  73   if ((FRAGP)->has_code                                                 \
  74       && (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 1) != 0)         \
  75      as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line,                  \
  76                    _("instruction address is not a multiple of 2"));
  77
  78 #endif /* TC_CRX_H */