gas/config/tc-frv.h

   1 /* tc-frv.h -- Header file for tc-frv.c.
   2    Copyright 2002, 2004, 2005, 2007, 2008, 2009
   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
  19    the Free Software Foundation, 51 Franklin Street - Fifth Floor,
  20    Boston, MA 02110-1301, USA. */
  21
  22 #define TC_FRV
  23
  24 #define LISTING_HEADER "FRV GAS "
  25
  26 /* The target BFD architecture.  */
  27 #define TARGET_ARCH bfd_arch_frv
  28
  29 #define TARGET_FORMAT (frv_md_fdpic_enabled () \
  30                        ? "elf32-frvfdpic" : "elf32-frv")
  31 extern bfd_boolean frv_md_fdpic_enabled (void);
  32
  33 #define TARGET_BYTES_BIG_ENDIAN 1
  34
  35 /* Permit temporary numeric labels.  */
  36 #define LOCAL_LABELS_FB 1
  37
  38 #define DIFF_EXPR_OK            /* .-foo gets turned into PC relative relocs */
  39
  40 /* We don't need to handle .word strangely.  */
  41 #define WORKING_DOT_WORD
  42
  43 /* Values passed to md_apply_fix don't include the symbol value.  */
  44 #define MD_APPLY_SYM_VALUE(FIX) 0
  45
  46 extern void frv_tomcat_workaround (void);
  47 #define md_cleanup frv_tomcat_workaround
  48
  49 #define md_number_to_chars frv_md_number_to_chars
  50 extern void frv_md_number_to_chars (char *, valueT, int);
  51
  52 extern long frv_relax_frag (fragS *, long);
  53 #define md_relax_frag(segment, fragP, stretch) frv_relax_frag(fragP, stretch)
  54
  55 #define tc_fix_adjustable(FIX) frv_fix_adjustable (FIX)
  56 struct fix;
  57 extern bfd_boolean frv_fix_adjustable (struct fix *);
  58
  59 /* When relaxing, we need to emit various relocs we otherwise wouldn't.  */
  60 #define TC_FORCE_RELOCATION(fix) frv_force_relocation (fix)
  61 extern int frv_force_relocation (struct fix *);
  62
  63 /* If we simplify subtractions that aren't SUB_SAME or SUB_ABS, we end
  64    up with PCrel fixups, but since we don't have any PCrel relocs, we
  65    crash.  Preventing simplification gets us a good, early error.  */
  66 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
  67
  68 #undef GAS_CGEN_MAX_FIXUPS
  69 #define GAS_CGEN_MAX_FIXUPS 1
  70
  71 void frv_frob_label (symbolS *);
  72 #define tc_frob_label(sym) frv_frob_label(sym)
  73
  74 #define tc_gen_reloc gas_cgen_tc_gen_reloc
  75
  76 #define md_cgen_record_fixup_exp frv_cgen_record_fixup_exp
  77
  78 /* Call md_pcrel_from_section(), not md_pcrel_from().  */
  79 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
  80 extern long md_pcrel_from_section (struct fix *, segT);
  81
  82 /* After all of the symbols have been adjusted, go over the file looking
  83    for any relocations that pic won't support.  */
  84 #define tc_frob_file() frv_frob_file ()
  85 extern void frv_frob_file (void);
  86
  87 /* We don't want 0x00 for code alignment because this generates `add.p
  88    gr0, gr0, gr0' patterns.  Although it's fine as a nop instruction,
  89    it has the VLIW packing bit set, which means if you have a bunch of
  90    them in a row and attempt to execute them, you'll exceed the VLIW
  91    capacity and fail.  This also gets GDB confused sometimes, because
  92    it won't set breakpoints in instructions other than the first of a
  93    VLIW pack, so you used to be unable to set a breakpoint in the
  94    initial instruction of a function that followed such
  95    alignment-introduced instructions.
  96
  97    We could have arranged to emit `nop' instructions (0x80880000),
  98    maybe even VLIW-pack sequences of nop instructions as much as
  99    possible for the selected machine type, just in case the alignment
 100    code actually happens to run, but this is probably too much effort
 101    for little gain.  This code is not meant to be run anyway, so just
 102    emit nops.  */
 103 #define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4)
 104 #define HANDLE_ALIGN(FRAGP) do                                          \
 105   if ((FRAGP)->fr_type == rs_align_code)                                \
 106     {                                                                   \
 107       valueT count = ((FRAGP)->fr_next->fr_address                      \
 108                       - ((FRAGP)->fr_address + (FRAGP)->fr_fix));       \
 109       char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix;               \
 110       if ((count & 3) != 0)                                             \
 111         {                                                               \
 112           memset (dest, 0, (count & 3));                                \
 113           (FRAGP)->fr_fix += (count & 3);                               \
 114           dest += (count & 3);                                          \
 115           count -= (count & 3);                                         \
 116         }                                                               \
 117       if (count)                                                        \
 118         {                                                               \
 119           (FRAGP)->fr_var = 4;                                          \
 120           *dest++ = 0x80;                                               \
 121           *dest++ = 0x88;                                               \
 122           *dest++ = 0x00;                                               \
 123           *dest++ = 0x00;                                               \
 124         }                                                               \
 125     }                                                                   \
 126  while (0)