gas/config/tc-mips.h

   1 /* tc-mips.h -- header file for tc-mips.c.
   2    Copyright 1993, 1994, 1995, 1996, 1997, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4    Contributed by the OSF and Ralph Campbell.
   5    Written by Keith Knowles and Ralph Campbell, working independently.
   6    Modified for ECOFF support by Ian Lance Taylor of Cygnus Support.
   7
   8    This file is part of GAS.
   9
  10    GAS is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2, or (at your option)
  13    any later version.
  14
  15    GAS is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with GAS; see the file COPYING.  If not, write to the Free
  22    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  23    02111-1307, USA.  */
  24
  25 #ifndef TC_MIPS
  26
  27 #define TC_MIPS
  28
  29 #ifdef ANSI_PROTOTYPES
  30 struct frag;
  31 struct expressionS;
  32 #endif
  33
  34 /* Default to big endian.  */
  35 #ifndef TARGET_BYTES_BIG_ENDIAN
  36 #define TARGET_BYTES_BIG_ENDIAN         1
  37 #endif
  38
  39 #define TARGET_ARCH bfd_arch_mips
  40
  41 #define WORKING_DOT_WORD        1
  42 #define OLD_FLOAT_READS
  43 #define REPEAT_CONS_EXPRESSIONS
  44 #define RELOC_EXPANSION_POSSIBLE
  45 #define MAX_RELOC_EXPANSION 3
  46 #define LOCAL_LABELS_FB 1
  47
  48 /* Maximum symbol offset that can be encoded in a BFD_RELOC_GPREL16
  49    relocation: */
  50 #define MAX_GPREL_OFFSET (0x7FF0)
  51
  52 #define md_relax_frag(segment, fragp, stretch) \
  53   mips_relax_frag(segment, fragp, stretch)
  54 extern int mips_relax_frag PARAMS ((asection *, struct frag *, long));
  55
  56 #define md_undefined_symbol(name)       (0)
  57 #define md_operand(x)
  58
  59 extern void mips_handle_align PARAMS ((struct frag *));
  60 #define HANDLE_ALIGN(fragp)  mips_handle_align (fragp)
  61
  62 #define MAX_MEM_FOR_RS_ALIGN_CODE  (1 + 2)
  63
  64 /* We permit PC relative difference expressions when generating
  65    embedded PIC code.  */
  66 #define DIFF_EXPR_OK
  67
  68 /* Tell assembler that we have an itbl_mips.h header file to include.  */
  69 #define HAVE_ITBL_CPU
  70
  71 /* The endianness of the target format may change based on command
  72    line arguments.  */
  73 #define TARGET_FORMAT mips_target_format()
  74 extern const char *mips_target_format PARAMS ((void));
  75
  76 /* MIPS PIC level.  */
  77
  78 enum mips_pic_level
  79 {
  80   /* Do not generate PIC code.  */
  81   NO_PIC,
  82
  83   /* Generate PIC code as in the SVR4 MIPS ABI.  */
  84   SVR4_PIC,
  85
  86   /* Generate PIC code without using a global offset table: the data
  87      segment has a maximum size of 64K, all data references are off
  88      the $gp register, and all text references are PC relative.  This
  89      is used on some embedded systems.  */
  90   EMBEDDED_PIC
  91 };
  92
  93 extern enum mips_pic_level mips_pic;
  94
  95 struct mips_cl_insn
  96 {
  97   unsigned long insn_opcode;
  98   const struct mips_opcode *insn_mo;
  99   /* The next two fields are used when generating mips16 code.  */
 100   boolean use_extend;
 101   unsigned short extend;
 102 };
 103
 104 extern int tc_get_register PARAMS ((int frame));
 105
 106 #define md_after_parse_args() mips_after_parse_args()
 107 extern void mips_after_parse_args PARAMS ((void));
 108
 109 #define tc_init_after_args() mips_init_after_args()
 110 extern void mips_init_after_args PARAMS ((void));
 111
 112 #define md_parse_long_option(arg) mips_parse_long_option (arg)
 113 extern int mips_parse_long_option PARAMS ((const char *));
 114
 115 #define tc_frob_label(sym) mips_define_label (sym)
 116 extern void mips_define_label PARAMS ((symbolS *));
 117
 118 #define tc_frob_file_before_adjust() mips_frob_file_before_adjust ()
 119 extern void mips_frob_file_before_adjust PARAMS ((void));
 120
 121 #define tc_frob_file_before_fix() mips_frob_file ()
 122 extern void mips_frob_file PARAMS ((void));
 123
 124 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
 125 #define tc_frob_file_after_relocs mips_frob_file_after_relocs
 126 extern void mips_frob_file_after_relocs PARAMS ((void));
 127 #endif
 128
 129 #define tc_fix_adjustable(fixp) mips_fix_adjustable (fixp)
 130 extern int mips_fix_adjustable PARAMS ((struct fix *));
 131
 132 /* Global syms must not be resolved, to support ELF shared libraries.
 133    When generating embedded code, we don't have shared libs.  */
 134 #define EXTERN_FORCE_RELOC                      \
 135   (OUTPUT_FLAVOR == bfd_target_elf_flavour      \
 136    && mips_pic != EMBEDDED_PIC)
 137
 138 /* When generating embedded PIC code we must keep PC relative
 139    relocations.  */
 140 #define TC_FORCE_RELOCATION(FIX) mips_force_relocation (FIX)
 141 extern int mips_force_relocation PARAMS ((struct fix *));
 142
 143 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG)  \
 144   (mips_force_relocation (FIX)                  \
 145    || !SEG_NORMAL (SEG))
 146
 147 /* Register mask variables.  These are set by the MIPS assembly code
 148    and used by ECOFF and possibly other object file formats.  */
 149 extern unsigned long mips_gprmask;
 150 extern unsigned long mips_cprmask[4];
 151
 152 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
 153
 154 #define elf_tc_final_processing mips_elf_final_processing
 155 extern void mips_elf_final_processing PARAMS ((void));
 156
 157 #define ELF_TC_SPECIAL_SECTIONS \
 158   { ".sdata",   SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL  }, \
 159   { ".sbss",    SHT_NOBITS,     SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL  }, \
 160   { ".lit4",    SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL  }, \
 161   { ".lit8",    SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL  }, \
 162   { ".ucode",   SHT_MIPS_UCODE, 0                                       }, \
 163   { ".mdebug",  SHT_MIPS_DEBUG, 0                                       },
 164 /* Other special sections not generated by the assembler: .reginfo,
 165    .liblist, .conflict, .gptab, .got, .dynamic, .rel.dyn.  */
 166
 167 #endif
 168
 169 extern void md_mips_end PARAMS ((void));
 170 #define md_end()        md_mips_end()
 171
 172 #define USE_GLOBAL_POINTER_OPT  (OUTPUT_FLAVOR == bfd_target_ecoff_flavour \
 173                                  || OUTPUT_FLAVOR == bfd_target_coff_flavour \
 174                                  || OUTPUT_FLAVOR == bfd_target_elf_flavour)
 175
 176 extern void mips_pop_insert PARAMS ((void));
 177 #define md_pop_insert()         mips_pop_insert()
 178
 179 extern void mips_flush_pending_output PARAMS ((void));
 180 #define md_flush_pending_output mips_flush_pending_output
 181
 182 extern void mips_enable_auto_align PARAMS ((void));
 183 #define md_elf_section_change_hook()    mips_enable_auto_align()
 184
 185 #endif /* TC_MIPS */