gas/config/tc-hppa.h

   1 /* tc-hppa.h -- Header file for the PA
   2    Copyright 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001
   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 /* HP PA-RISC support was contributed by the Center for Software Science
  23    at the University of Utah.  */
  24
  25 /* Please refrain from exposing the world to the internals of tc-hppa.c
  26    when this file is included.  This means only declaring exported functions,
  27    (please PARAMize them!) not exporting structures and data items which
  28    are used solely within tc-hppa.c, etc.
  29
  30    Also refrain from adding any more object file dependent code, there is
  31    already far too much object file format dependent code in this file.
  32    In theory this file should contain only exported functions, structures
  33    and data declarations common to all PA assemblers.  */
  34
  35 #ifndef _TC_HPPA_H
  36 #define _TC_HPPA_H
  37
  38 #ifndef TC_HPPA
  39 #define TC_HPPA 1
  40 #endif
  41
  42 #define TARGET_BYTES_BIG_ENDIAN 1
  43
  44 #define TARGET_ARCH bfd_arch_hppa
  45
  46 #define WORKING_DOT_WORD
  47
  48 #ifdef OBJ_ELF
  49 #if TARGET_ARCH_SIZE == 64
  50 #include "bfd/elf64-hppa.h"
  51 #ifdef TE_LINUX
  52 #define TARGET_FORMAT "elf64-hppa-linux"
  53 #else
  54 #define TARGET_FORMAT "elf64-hppa"
  55 #endif
  56 #else /* TARGET_ARCH_SIZE == 32 */
  57 #include "bfd/elf32-hppa.h"
  58 #ifdef TE_LINUX
  59 #define TARGET_FORMAT "elf32-hppa-linux"
  60 #else
  61 #define TARGET_FORMAT "elf32-hppa"
  62 #endif
  63 #endif
  64 #endif
  65
  66 #ifdef OBJ_SOM
  67 #include "bfd/som.h"
  68 #define TARGET_FORMAT "som"
  69 #endif
  70
  71 #ifdef TE_LINUX
  72 /* Define to compile in an extra assembler option, -c, which enables a
  73    warning (once per file) when a comment is encountered.
  74    The hppa comment char is a `;' which tends to occur in random C asm
  75    statements.  A semicolon is a line separator for most assemblers.
  76    It's hard to find these lurking semicolons.  Thus...  */
  77 #define WARN_COMMENTS 1
  78 #endif
  79
  80 /* FIXME.  Why oh why aren't these defined somewhere globally?  */
  81 #ifndef FALSE
  82 #define FALSE   (0)
  83 #define TRUE    (!FALSE)
  84 #endif
  85
  86 #define ASEC_NULL (asection *)0
  87
  88 /* pa_define_label gets used outside of tc-hppa.c via tc_frob_label.  */
  89 extern void pa_define_label PARAMS ((symbolS *));
  90
  91 extern void parse_cons_expression_hppa PARAMS ((expressionS *));
  92 extern void cons_fix_new_hppa PARAMS ((fragS *, int, int, expressionS *));
  93 extern int hppa_force_relocation PARAMS ((struct fix *));
  94
  95 /* This gets called before writing the object file to make sure
  96    things like entry/exit and proc/procend pairs match.  */
  97 extern void pa_check_eof PARAMS ((void));
  98 #define tc_frob_file pa_check_eof
  99
 100 #define tc_frob_label(sym) pa_define_label (sym)
 101
 102 /* The PA does not need support for either of these.  */
 103 #define tc_crawl_symbol_chain(headers) {;}
 104 #define tc_headers_hook(headers) {;}
 105
 106 #define RELOC_EXPANSION_POSSIBLE
 107 #define MAX_RELOC_EXPANSION 6
 108
 109 /* The PA needs to parse field selectors in .byte, etc.  */
 110
 111 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
 112   parse_cons_expression_hppa (EXP)
 113 #define TC_CONS_FIX_NEW cons_fix_new_hppa
 114
 115 /* On the PA, an equal sign often appears as a condition or nullification
 116    completer in an instruction.  This can be detected by checking the
 117    previous character, if the character is a comma, then the equal is
 118    being used as part of an instruction.  */
 119 #define TC_EQUAL_IN_INSN(C, PTR)        ((C) == ',')
 120
 121 /* Similarly for an exclamation point.  It is used in FP comparison
 122    instructions and as an end of line marker.  When used in an instruction
 123    it will always follow a comma.  */
 124 #define TC_EOL_IN_INSN(PTR)     (*(PTR) == '!' && (PTR)[-1] == ',')
 125
 126 int hppa_fix_adjustable PARAMS((struct fix *));
 127 #define tc_fix_adjustable hppa_fix_adjustable
 128
 129 /* Because of the strange PA calling conventions, it is sometimes
 130    necessary to emit a relocation for a call even though it would
 131    normally appear safe to handle it completely within GAS.  */
 132 #define TC_FORCE_RELOCATION(FIXP) hppa_force_relocation (FIXP)
 133
 134 #ifdef OBJ_SOM
 135 /* If a symbol is imported, but never used, then the symbol should
 136    *not* end up in the symbol table.  Likewise for absolute symbols
 137    with local scope.  */
 138 #define tc_frob_symbol(sym,punt) \
 139     if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \
 140         || (S_GET_SEGMENT (sym) == &bfd_abs_section \
 141             && ! S_IS_EXTERNAL (sym))) \
 142       punt = 1
 143
 144 /* We need to be able to make relocations involving the difference of
 145    two symbols.  This includes the difference of two symbols when
 146    one of them is undefined (this comes up in PIC code generation).
 147
 148    We don't define DIFF_EXPR_OK because it does the wrong thing if
 149    the add symbol is undefined and the sub symbol is a symbol in
 150    the same section as the relocation.  We also need some way to
 151    specialize some code in adjust_reloc_syms.  */
 152 #define UNDEFINED_DIFFERENCE_OK
 153 #endif
 154
 155 #ifdef OBJ_ELF
 156 /* It's OK to subtract two symbols in the same section without
 157    emitting a relocation.  */
 158 #define TC_FORCE_RELOCATION_SECTION(FIXP, SEC) 0
 159
 160 /* Handle .type psuedo.  Given a type string of `millicode', set the
 161    internal elf symbol type to STT_PARISC_MILLI, and return
 162    BSF_FUNCTION for the BFD symbol type.  */
 163 #define md_elf_symbol_type(name, sym, elf)                              \
 164   ((strcmp ((name), "millicode") == 0                                   \
 165     || strcmp ((name), "STT_PARISC_MILLI") == 0)                        \
 166    ? (((elf)->internal_elf_sym.st_info = ELF_ST_INFO                    \
 167        (ELF_ST_BIND ((elf)->internal_elf_sym.st_info), STT_PARISC_MILLI)\
 168        ), BSF_FUNCTION)                                                 \
 169    : -1)
 170
 171 #define tc_frob_symbol(sym,punt) \
 172   { \
 173     if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \
 174         || (S_GET_SEGMENT (sym) == &bfd_abs_section \
 175             && ! S_IS_EXTERNAL (sym)) \
 176         || strcmp (S_GET_NAME (sym), "$global$") == 0 \
 177         || strcmp (S_GET_NAME (sym), "$PIC_pcrel$0") == 0) \
 178       punt = 1; \
 179   }
 180
 181 #define elf_tc_final_processing elf_hppa_final_processing
 182 void elf_hppa_final_processing PARAMS ((void));
 183
 184 #define DWARF2_LINE_MIN_INSN_LENGTH 4
 185 #endif /* OBJ_ELF */
 186
 187 #define md_operand(x)
 188
 189 /* Allow register expressions to be treated as absolute expressions.
 190    A silly fudge required for backwards compatibility.  */
 191 #define md_optimize_expr hppa_force_reg_syms_absolute
 192
 193 int hppa_force_reg_syms_absolute
 194   PARAMS ((expressionS *, operatorT, expressionS *));
 195
 196 #define TC_FIX_TYPE PTR
 197 #define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL)
 198
 199 #endif /* _TC_HPPA_H */