gas/config/tc-ppc.h

   1 /* tc-ppc.h -- Header file for tc-ppc.c.
   2    Copyright (C) 1994-2015 Free Software Foundation, Inc.
   3    Written by Ian Lance Taylor, Cygnus Support.
   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 #define TC_PPC
  23
  24 #include "opcode/ppc.h"
  25
  26 struct fix;
  27
  28 /* Set the endianness we are using.  Default to big endian.  */
  29 #ifndef TARGET_BYTES_BIG_ENDIAN
  30 #define TARGET_BYTES_BIG_ENDIAN 1
  31 #endif
  32
  33 /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
  34    XCOFF for AIX or PowerMac.  If TE_PE is defined, we are assembling
  35    COFF for Windows NT.  */
  36
  37 #ifdef OBJ_COFF
  38 #ifndef TE_PE
  39 #define OBJ_XCOFF
  40 #endif
  41 #endif
  42
  43 /* The target BFD architecture.  */
  44 #define TARGET_ARCH (ppc_arch ())
  45 #define TARGET_MACH (ppc_mach ())
  46 extern enum bfd_architecture ppc_arch (void);
  47 extern unsigned long ppc_mach (void);
  48
  49 /* Whether or not the target is big endian */
  50 extern int target_big_endian;
  51
  52 /* The target BFD format.  */
  53 #define TARGET_FORMAT (ppc_target_format ())
  54 extern char *ppc_target_format (void);
  55
  56 /* Permit temporary numeric labels.  */
  57 #define LOCAL_LABELS_FB 1
  58
  59 /* $ is used to refer to the current location.  */
  60 #define DOLLAR_DOT
  61
  62 /* Strings do not use backslash escapes under COFF.  */
  63 #ifdef OBJ_COFF
  64 #define NO_STRING_ESCAPES
  65 #endif
  66
  67 #ifdef OBJ_ELF
  68 #define DIFF_EXPR_OK            /* foo-. gets turned into PC relative relocs */
  69 #endif
  70
  71 #if TARGET_BYTES_BIG_ENDIAN
  72 #define PPC_BIG_ENDIAN 1
  73 #else
  74 #define PPC_BIG_ENDIAN 0
  75 #endif
  76
  77 /* We don't need to handle .word strangely.  */
  78 #define WORKING_DOT_WORD
  79
  80 #define MAX_MEM_FOR_RS_ALIGN_CODE 4
  81 #define HANDLE_ALIGN(FRAGP)                                             \
  82   if ((FRAGP)->fr_type == rs_align_code)                                \
  83     ppc_handle_align (FRAGP);
  84
  85 extern void ppc_handle_align (struct frag *);
  86 extern void ppc_frag_check (struct frag *);
  87
  88 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
  89
  90 #define md_frag_check(FRAGP) ppc_frag_check (FRAGP)
  91
  92 /* Arrange to store the value of ppc_cpu at the site of a fixup
  93    for later use in md_apply_fix.  */
  94 struct _ppc_fix_extra
  95 {
  96   ppc_cpu_t ppc_cpu;
  97 };
  98
  99 extern ppc_cpu_t ppc_cpu;
 100
 101 #define TC_FIX_TYPE struct _ppc_fix_extra
 102 #define TC_INIT_FIX_DATA(FIXP) \
 103   do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0)
 104 \f
 105 #ifdef TE_PE
 106
 107 /* Question marks are permitted in symbol names.  */
 108 #define LEX_QM 1
 109
 110 /* Don't adjust TOC relocs.  */
 111 #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
 112 extern int ppc_pe_fix_adjustable (struct fix *);
 113
 114 #endif
 115
 116 #ifdef OBJ_XCOFF
 117
 118 /* Declarations needed when generating XCOFF code.  XCOFF is an
 119    extension of COFF, used only on the RS/6000.  Rather than create an
 120    obj-xcoff, we just use obj-coff, and handle the extensions here in
 121    tc-ppc.  */
 122
 123 /* We need to keep some information for symbols.  */
 124 struct ppc_tc_sy
 125 {
 126   /* We keep a few linked lists of symbols.  */
 127   symbolS *next;
 128   /* The real name, if the symbol was renamed.  */
 129   char *real_name;
 130   /* Non-zero if the symbol should be output.  The RS/6000 assembler
 131      only outputs symbols that are external or are mentioned in a
 132      .globl or .lglobl statement.  */
 133   unsigned char output;
 134   /* The symbol class.  */
 135   short symbol_class;
 136   /* For a csect or common symbol, the alignment to use.  */
 137   unsigned char align;
 138   /* For a csect symbol, the subsegment we are using.  This is zero
 139      for symbols that are not csects.  */
 140   subsegT subseg;
 141   /* For a csect symbol, the last symbol which has been defined in
 142      this csect, or NULL if none have been defined so far.
 143      For a .bs symbol, the referenced csect symbol.
 144      For a label, the enclosing csect.  */
 145   symbolS *within;
 146   union
 147   {
 148     /* For a function symbol, a symbol whose value is the size.  The
 149        field is NULL if there is no size.  */
 150     symbolS *size;
 151     /* For a dwarf symbol, the corresponding dwarf subsection.  */
 152     struct dw_subsection *dw;
 153   } u;
 154 };
 155
 156 #define TC_SYMFIELD_TYPE struct ppc_tc_sy
 157
 158 /* We need an additional auxent for function symbols.  */
 159 #define OBJ_COFF_MAX_AUXENTRIES 2
 160
 161 /* Square and curly brackets are permitted in symbol names.  */
 162 #define LEX_BR 3
 163
 164 /* Canonicalize the symbol name.  */
 165 #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
 166 extern char *ppc_canonicalize_symbol_name (char *);
 167
 168 /* Get the symbol class from the name.  */
 169 #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
 170 extern void ppc_symbol_new_hook (symbolS *);
 171
 172 /* Set the symbol class of a label based on the csect.  */
 173 #define tc_frob_label(sym) ppc_frob_label (sym)
 174 extern void ppc_frob_label (symbolS *);
 175
 176 /* TOC relocs requires special handling.  */
 177 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
 178 extern int ppc_fix_adjustable (struct fix *);
 179
 180 /* We need to set the section VMA.  */
 181 #define tc_frob_section(sec) ppc_frob_section (sec)
 182 extern void ppc_frob_section (asection *);
 183
 184 /* Finish up the symbol.  */
 185 #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
 186 extern int ppc_frob_symbol (symbolS *);
 187
 188 /* Finish up the entire symtab.  */
 189 #define tc_adjust_symtab() ppc_adjust_symtab ()
 190 extern void ppc_adjust_symtab (void);
 191
 192 /* We also need to copy, in particular, the class of the symbol,
 193    over what obj-coff would otherwise have copied.  */
 194 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src)                    \
 195 do {                                                            \
 196   if (SF_GET_GET_SEGMENT (dest))                                \
 197     S_SET_SEGMENT (dest, S_GET_SEGMENT (src));                  \
 198   symbol_get_tc (dest)->u = symbol_get_tc (src)->u;             \
 199   symbol_get_tc (dest)->align = symbol_get_tc (src)->align;     \
 200   symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_class;       \
 201   symbol_get_tc (dest)->within = symbol_get_tc (src)->within;   \
 202 } while (0)
 203
 204 extern void ppc_xcoff_end (void);
 205 #define md_end ppc_xcoff_end
 206
 207 #define tc_new_dot_label(sym) ppc_new_dot_label (sym)
 208 extern void ppc_new_dot_label (symbolS *);
 209
 210 #endif /* OBJ_XCOFF */
 211
 212 extern const char       ppc_symbol_chars[];
 213 #define tc_symbol_chars ppc_symbol_chars
 214
 215 #ifdef OBJ_ELF
 216
 217 /* Support for SHT_ORDERED */
 218 extern int ppc_section_type (char *, size_t);
 219 extern int ppc_section_flags (flagword, bfd_vma, int);
 220
 221 #define md_elf_section_type(STR, LEN)           ppc_section_type (STR, LEN)
 222 #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
 223
 224 #define tc_comment_chars ppc_comment_chars
 225 extern const char *ppc_comment_chars;
 226
 227 /* Keep relocations relative to the GOT, or non-PC relative.  */
 228 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
 229 extern int ppc_fix_adjustable (struct fix *);
 230
 231 /* Values passed to md_apply_fix don't include symbol values.  */
 232 #define MD_APPLY_SYM_VALUE(FIX) 0
 233
 234 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
 235   ppc_elf_parse_cons (EXP, NBYTES)
 236 extern bfd_reloc_code_real_type ppc_elf_parse_cons (expressionS *,
 237                                                     unsigned int);
 238 #define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \
 239   ppc_elf_cons_fix_check (EXP, NBYTES, FIX)
 240 extern void ppc_elf_cons_fix_check (expressionS *, unsigned int, struct fix *);
 241
 242 #define tc_frob_file_before_adjust ppc_frob_file_before_adjust
 243 extern void ppc_frob_file_before_adjust (void);
 244
 245 #define tc_adjust_symtab() ppc_elf_adjust_symtab ()
 246 extern void ppc_elf_adjust_symtab (void);
 247
 248 extern void ppc_elf_end (void);
 249 #define md_end ppc_elf_end
 250
 251 #endif /* OBJ_ELF */
 252
 253 #if defined (OBJ_ELF) || defined (OBJ_XCOFF)
 254 #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
 255 extern int ppc_force_relocation (struct fix *);
 256 #endif
 257
 258 /* call md_pcrel_from_section, not md_pcrel_from */
 259 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
 260 extern long md_pcrel_from_section (struct fix *, segT);
 261
 262 #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
 263 extern int ppc_parse_name (const char *, struct expressionS *);
 264
 265 #define md_operand(x)
 266
 267 #define md_cleanup() ppc_cleanup ()
 268 extern void ppc_cleanup (void);
 269
 270 #if (defined TE_AIX5 || defined TE_AIX                                  \
 271      || defined TE_FreeBSD || defined TE_NetBSD || defined TE_LYNX)
 272 /* ppc uses different register numbers between .eh_frame and .debug_frame.
 273    This macro translates the .eh_frame register numbers to .debug_frame
 274    register numbers.  */
 275 #define md_reg_eh_frame_to_debug_frame(regno)                           \
 276   ((regno) == 70 ? 64   /* cr2 */                                       \
 277    : (regno) == 65 ? 108 /* lr */                                       \
 278    : (regno) == 66 ? 109 /* ctr */                                      \
 279    : (regno) >= 68 && (regno) <= 75 ? (regno) + 86 - 68 /* crN */       \
 280    : (regno) == 76 ? 101 /* xer */                                      \
 281    : (regno) >= 77 && (regno) <= 108 ? (regno) + 1124 - 77 /* vrN */    \
 282    : (regno) == 109 ? 356 /* vrsave */                                  \
 283    : (regno) == 110 ? 67 /* vscr */                                     \
 284    : (regno) == 111 ? 99 /* spe_acc */                                  \
 285    : (regno) == 112 ? 612 /* spefscr */                                 \
 286    : (regno))
 287 #endif
 288
 289 #define TARGET_USE_CFIPOP 1
 290
 291 #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
 292 extern void ppc_cfi_frame_initial_instructions (void);
 293
 294 #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
 295 extern int tc_ppc_regname_to_dw2regnum (char *);
 296
 297 extern int ppc_cie_data_alignment;
 298
 299 extern int ppc_dwarf2_line_min_insn_length;
 300
 301 #define DWARF2_LINE_MIN_INSN_LENGTH     ppc_dwarf2_line_min_insn_length
 302 #define DWARF2_DEFAULT_RETURN_COLUMN    0x41
 303 #define DWARF2_CIE_DATA_ALIGNMENT       ppc_cie_data_alignment