gas/config/tc-hppa.h

   1 /* tc-hppa.h -- Header file for the PA
   2    Copyright (C) 1989, 93, 94, 95, 96, 97, 98, 1999
   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 1, 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, 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, USA.  */
  21
  22
  23 /* HP PA-RISC support was contributed by the Center for Software Science
  24    at the University of Utah.  */
  25
  26 /* Please refrain from exposing the world to the internals of tc-hppa.c
  27    when this file is included.  This means only declaring exported functions,
  28    (please PARAMize them!) not exporting structures and data items which
  29    are used solely within tc-hppa.c, etc.
  30
  31    Also refrain from adding any more object file dependent code, there is
  32    already far too much object file format dependent code in this file.
  33    In theory this file should contain only exported functions, structures
  34    and data declarations common to all PA assemblers.  */
  35
  36 #ifndef _TC_HPPA_H
  37 #define _TC_HPPA_H
  38
  39 #ifndef TC_HPPA
  40 #define TC_HPPA 1
  41 #endif
  42
  43 #define TARGET_BYTES_BIG_ENDIAN 1
  44
  45 #define TARGET_ARCH bfd_arch_hppa
  46
  47 #define WORKING_DOT_WORD
  48
  49 /* FIXME.  The lack of a place to put things which are both target cpu
  50    and target format dependent makes hacks like this necessary.  */
  51 #ifdef OBJ_ELF
  52 #ifdef BFD64
  53 #include "bfd/elf64-hppa.h"
  54 #define TARGET_FORMAT "elf64-hppa"
  55 #else
  56 #include "bfd/elf32-hppa.h"
  57 #define TARGET_FORMAT "elf32-hppa"
  58 #endif
  59 #endif
  60
  61 #ifdef OBJ_SOM
  62 #include "bfd/som.h"
  63 #define TARGET_FORMAT "som"
  64 #endif
  65
  66 /* FIXME.  Why oh why aren't these defined somewhere globally?  */
  67 #ifndef FALSE
  68 #define FALSE   (0)
  69 #define TRUE    (!FALSE)
  70 #endif
  71
  72 #define ASEC_NULL (asection *)0
  73
  74 /* Labels are not required to have a colon for a suffix.  */
  75 #define LABELS_WITHOUT_COLONS
  76
  77 /* FIXME.  This should be static and declared in tc-hppa.c, but
  78    pa_define_label gets used outside of tc-hppa.c via tc_frob_label.
  79    Should also be PARAMized, but symbolS isn't available here.  */
  80 extern void pa_define_label ();
  81
  82 /* FIXME.  Types not available here, so they can't be PARAMized.  */
  83 extern void parse_cons_expression_hppa ();
  84 extern void cons_fix_new_hppa ();
  85 extern int hppa_force_relocation ();
  86
  87 /* This gets called before writing the object file to make sure
  88    things like entry/exit and proc/procend pairs match.  */
  89 extern void pa_check_eof PARAMS ((void));
  90 #define tc_frob_file pa_check_eof
  91
  92 #define tc_frob_label(sym) pa_define_label (sym)
  93
  94 /* The PA does not need support for either of these.  */
  95 #define tc_crawl_symbol_chain(headers) {;}
  96 #define tc_headers_hook(headers) {;}
  97
  98 #define RELOC_EXPANSION_POSSIBLE
  99 #define MAX_RELOC_EXPANSION 6
 100
 101 /* FIXME.  More things which are both HPPA and ELF specific.  There is
 102    nowhere to put such things.  */
 103 #ifdef OBJ_ELF
 104 #define elf_tc_final_processing elf_hppa_final_processing
 105 void elf_hppa_final_processing PARAMS ((void));
 106 #endif
 107
 108 /* The PA needs to parse field selectors in .byte, etc.  */
 109
 110 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
 111   parse_cons_expression_hppa (EXP)
 112 #define TC_CONS_FIX_NEW cons_fix_new_hppa
 113
 114 /* On the PA, an equal sign often appears as a condition or nullification
 115    completer in an instruction.  This can be detected by checking the
 116    previous character, if the character is a comma, then the equal is
 117    being used as part of an instruction.  */
 118 #define TC_EQUAL_IN_INSN(C, PTR)        ((C) == ',')
 119
 120 /* Similarly for an exclamation point.  It is used in FP comparison
 121    instructions and as an end of line marker.  When used in an instruction
 122    it will always follow a comma.  */
 123 #define TC_EOL_IN_INSN(PTR)     (*(PTR) == '!' && (PTR)[-1] == ',')
 124
 125 #define tc_fix_adjustable hppa_fix_adjustable
 126
 127 /* Because of the strange PA calling conventions, it is sometimes
 128    necessary to emit a relocation for a call even though it would
 129    normally appear safe to handle it completely within GAS.  */
 130 #define TC_FORCE_RELOCATION(FIXP) hppa_force_relocation (FIXP)
 131
 132 #ifdef OBJ_SOM
 133 /* If a symbol is imported, but never used, then the symbol should
 134    *not* end up in the symbol table.  Likewise for absolute symbols
 135    with local scope.  */
 136 #define tc_frob_symbol(sym,punt) \
 137     if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \
 138         || (S_GET_SEGMENT (sym) == &bfd_abs_section \
 139             && ! S_IS_EXTERNAL (sym))) \
 140       punt = 1
 141
 142 /* We need to be able to make relocations involving the difference of
 143    two symbols.  This includes the difference of two symbols when
 144    one of them is undefined (this comes up in PIC code generation).
 145
 146    We don't define DIFF_EXPR_OK because it does the wrong thing if
 147    the add symbol is undefined and the sub symbol is a symbol in
 148    the same section as the relocation.  We also need some way to
 149    specialize some code in adjust_reloc_syms.  */
 150 #define UNDEFINED_DIFFERENCE_OK
 151 #endif
 152
 153 #ifdef OBJ_ELF
 154 #define tc_frob_symbol(sym,punt) \
 155   { \
 156     if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \
 157         || (S_GET_SEGMENT (sym) == &bfd_abs_section \
 158             && ! S_IS_EXTERNAL (sym)) \
 159         || strcmp (S_GET_NAME (sym), "$global$") == 0) \
 160       punt = 1; \
 161   }
 162 #endif
 163
 164 #define md_operand(x)
 165
 166 #define TC_FIX_TYPE PTR
 167 #define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL)
 168
 169 #endif /* _TC_HPPA_H */