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, 2002,
   3    2003, 2004, 2005, 2006, 2007, 2008, 2009 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 /* 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 #if defined (TE_LINUX) || defined (TE_NetBSD)
  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 #if defined (TE_LINUX)
  59 #define TARGET_FORMAT "elf32-hppa-linux"
  60 #else
  61 #if defined (TE_NetBSD)
  62 #define TARGET_FORMAT "elf32-hppa-netbsd"
  63 #else
  64 #define TARGET_FORMAT "elf32-hppa"
  65 #endif
  66 #endif
  67 #endif
  68 #endif
  69
  70 #ifdef OBJ_SOM
  71 #include "bfd/som.h"
  72 #define TARGET_FORMAT "som"
  73 #endif
  74
  75 #if defined(TE_LINUX) || defined(TE_NetBSD)
  76 /* Define to compile in an extra assembler option, -c, which enables a
  77    warning (once per file) when a comment is encountered.
  78    The hppa comment char is a `;' which tends to occur in random C asm
  79    statements.  A semicolon is a line separator for most assemblers.
  80    It's hard to find these lurking semicolons.  Thus...  */
  81 #define WARN_COMMENTS 1
  82 #endif
  83
  84 /* FIXME.  Why oh why aren't these defined somewhere globally?  */
  85 #ifndef FALSE
  86 #define FALSE   (0)
  87 #define TRUE    (!FALSE)
  88 #endif
  89
  90 #define ASEC_NULL (asection *)0
  91
  92 /* pa_define_label gets used outside of tc-hppa.c via tc_frob_label.  */
  93 extern void pa_define_label (symbolS *);
  94 extern void parse_cons_expression_hppa (expressionS *);
  95 extern void cons_fix_new_hppa (fragS *, int, int, expressionS *);
  96 extern int hppa_force_relocation (struct fix *);
  97
  98 /* This gets called before writing the object file to make sure
  99    things like entry/exit and proc/procend pairs match.  */
 100 extern void pa_check_eof (void);
 101 #define tc_frob_file pa_check_eof
 102
 103 #define tc_frob_label(sym) pa_define_label (sym)
 104
 105 extern const char       hppa_symbol_chars[];
 106 #define tc_symbol_chars hppa_symbol_chars
 107
 108 #define RELOC_EXPANSION_POSSIBLE
 109 #define MAX_RELOC_EXPANSION 6
 110
 111 /* The PA needs to parse field selectors in .byte, etc.  */
 112
 113 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
 114   parse_cons_expression_hppa (EXP)
 115 #define TC_CONS_FIX_NEW cons_fix_new_hppa
 116
 117 /* On the PA, an exclamation point can appear in an instruction.  It is
 118    used in FP comparison instructions and as an end of line marker.
 119    When used in an instruction it will always follow a comma.  */
 120 #define TC_EOL_IN_INSN(PTR)     (*(PTR) == '!' && (PTR)[-1] == ',')
 121
 122 int hppa_fix_adjustable (struct fix *);
 123 #define tc_fix_adjustable hppa_fix_adjustable
 124
 125 #define EXTERN_FORCE_RELOC 1
 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(FIX) hppa_force_relocation (FIX)
 131
 132 /* Values passed to md_apply_fix don't include the symbol value.  */
 133 #define MD_APPLY_SYM_VALUE(FIX) 0
 134
 135 #ifdef OBJ_SOM
 136 /* If a symbol is imported, but never used, then the symbol should
 137    *not* end up in the symbol table.  Likewise for absolute symbols
 138    with local scope.  */
 139 #define tc_frob_symbol(sym,punt) \
 140     if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \
 141         || (S_GET_SEGMENT (sym) == &bfd_abs_section \
 142             && ! S_IS_EXTERNAL (sym))) \
 143       punt = 1
 144
 145 /* We need to be able to make relocations involving the difference of
 146    two symbols.  This includes the difference of two symbols when
 147    one of them is undefined (this comes up in PIC code generation).
 148
 149    We allow the difference of two symbols when the subtract symbol is
 150    local to the relocation.  This is implemented using R_HPPA_COMPLEX.
 151
 152    This has some limitations.  Difference expressions only work between
 153    symbols in the same segment/quadrant of a module since the HP dynamic
 154    loader relocates the text and data segments independently.  Thus, a
 155    difference expression can't be used between text and data symbols,
 156    or between symbols in different executable modules.  */
 157 #define DIFF_EXPR_OK 1
 158 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
 159 #define UNDEFINED_DIFFERENCE_OK
 160 #endif
 161
 162 #ifdef OBJ_ELF
 163
 164 /* Difference expressions for the 64-bit HP-UX target have the same
 165    limitations as those for the 32-bit SOM target.  */
 166 #define DIFF_EXPR_OK 1
 167
 168 /* Handle .type psuedo.  Given a type string of `millicode', set the
 169    internal elf symbol type to STT_PARISC_MILLI, and return
 170    BSF_FUNCTION for the BFD symbol type.  */
 171 #define md_elf_symbol_type(name, sym, elf)                              \
 172   ((strcmp ((name), "millicode") == 0                                   \
 173     || strcmp ((name), "STT_PARISC_MILLI") == 0)                        \
 174    ? (((elf)->internal_elf_sym.st_info = ELF_ST_INFO                    \
 175        (ELF_ST_BIND ((elf)->internal_elf_sym.st_info), STT_PARISC_MILLI)\
 176        ), BSF_FUNCTION)                                                 \
 177    : -1)
 178
 179 #define tc_frob_symbol(sym,punt) \
 180   { \
 181     if ((S_GET_SEGMENT (sym) == &bfd_und_section \
 182          && ! symbol_used_p (sym) \
 183          && ELF_ST_VISIBILITY (S_GET_OTHER (sym)) == STV_DEFAULT) \
 184         || strcmp (S_GET_NAME (sym), "$global$") == 0 \
 185         || strcmp (S_GET_NAME (sym), "$segrel$") == 0 \
 186         || strcmp (S_GET_NAME (sym), "$PIC_pcrel$0") == 0 \
 187         || strcmp (S_GET_NAME (sym), "$tls_gdidx$") == 0 \
 188         || strcmp (S_GET_NAME (sym), "$tls_ldidx$") == 0 \
 189         || strcmp (S_GET_NAME (sym), "$tls_dtpoff$") == 0 \
 190         || strcmp (S_GET_NAME (sym), "$tls_ieoff$") == 0 \
 191         || strcmp (S_GET_NAME (sym), "$tls_leoff$") == 0) \
 192       punt = 1; \
 193   }
 194
 195 #define elf_tc_final_processing elf_hppa_final_processing
 196 void elf_hppa_final_processing (void);
 197 #endif /* OBJ_ELF */
 198
 199 #define md_operand(x)
 200
 201 /* Allow register expressions to be treated as absolute expressions.
 202    A silly fudge required for backwards compatibility.  */
 203 #define md_optimize_expr hppa_force_reg_syms_absolute
 204
 205 int hppa_force_reg_syms_absolute (expressionS *, operatorT, expressionS *);
 206
 207 #define TC_FIX_TYPE void *
 208 #define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL)
 209
 210 #ifdef OBJ_ELF
 211 #define TARGET_USE_CFIPOP 1
 212
 213 #define tc_cfi_frame_initial_instructions hppa_cfi_frame_initial_instructions
 214 extern void hppa_cfi_frame_initial_instructions (void);
 215
 216 #define tc_regname_to_dw2regnum hppa_regname_to_dw2regnum
 217 extern int hppa_regname_to_dw2regnum (char *regname);
 218
 219 #define DWARF2_LINE_MIN_INSN_LENGTH 4
 220 #define DWARF2_DEFAULT_RETURN_COLUMN 2
 221 #if TARGET_ARCH_SIZE == 64
 222 #define DWARF2_CIE_DATA_ALIGNMENT 8
 223 #define DWARF2_FDE_RELOC_SIZE 8
 224 #else
 225 #define DWARF2_CIE_DATA_ALIGNMENT 4
 226 #endif
 227
 228 #if !defined (TE_LINUX) && !defined (TE_NetBSD)
 229 /* Due to the way dynamic linking to personality functions is handled
 230    on HP-UX, we need to have a read-write .eh_frame section.  */
 231 #define DWARF2_EH_FRAME_READ_ONLY 0
 232
 233 /* Because differences between text and data symbols don't work, we
 234    can't use difference expressions during CFI generation.  */
 235 #define CFI_DIFF_EXPR_OK 0
 236 #endif
 237
 238 #endif /* OBJ_ELF */
 239 #endif /* _TC_HPPA_H */