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) mips_relax_frag(fragp, stretch)
  53 extern int mips_relax_frag PARAMS ((struct frag *, long));
  54
  55 #define md_undefined_symbol(name)       (0)
  56 #define md_operand(x)
  57
  58 extern void mips_handle_align PARAMS ((struct frag *));
  59 #define HANDLE_ALIGN(fragp)  mips_handle_align (fragp)
  60
  61 #define MAX_MEM_FOR_RS_ALIGN_CODE  (1 + 2)
  62
  63 /* We permit PC relative difference expressions when generating
  64    embedded PIC code.  */
  65 #define DIFF_EXPR_OK
  66
  67 /* Tell assembler that we have an itbl_mips.h header file to include.  */
  68 #define HAVE_ITBL_CPU
  69
  70 /* The endianness of the target format may change based on command
  71    line arguments.  */
  72 #define TARGET_FORMAT mips_target_format()
  73 extern const char *mips_target_format PARAMS ((void));
  74
  75 /* MIPS PIC level.  */
  76
  77 enum mips_pic_level
  78 {
  79   /* Do not generate PIC code.  */
  80   NO_PIC,
  81
  82   /* Generate PIC code as in the SVR4 MIPS ABI.  */
  83   SVR4_PIC,
  84
  85   /* Generate PIC code without using a global offset table: the data
  86      segment has a maximum size of 64K, all data references are off
  87      the $gp register, and all text references are PC relative.  This
  88      is used on some embedded systems.  */
  89   EMBEDDED_PIC
  90 };
  91
  92 extern enum mips_pic_level mips_pic;
  93
  94 struct mips_cl_insn
  95 {
  96   unsigned long insn_opcode;
  97   const struct mips_opcode *insn_mo;
  98   /* The next two fields are used when generating mips16 code.  */
  99   boolean use_extend;
 100   unsigned short extend;
 101 };
 102
 103 extern int tc_get_register PARAMS ((int frame));
 104
 105 #define md_after_parse_args() mips_after_parse_args()
 106 extern void mips_after_parse_args PARAMS ((void));
 107
 108 #define tc_init_after_args() mips_init_after_args()
 109 extern void mips_init_after_args PARAMS ((void));
 110
 111 #define md_parse_long_option(arg) mips_parse_long_option (arg)
 112 extern int mips_parse_long_option PARAMS ((const char *));
 113
 114 #define tc_frob_label(sym) mips_define_label (sym)
 115 extern void mips_define_label PARAMS ((symbolS *));
 116
 117 #define tc_frob_file_before_adjust() mips_frob_file_before_adjust ()
 118 extern void mips_frob_file_before_adjust PARAMS ((void));
 119
 120 #define tc_frob_file_before_fix() mips_frob_file ()
 121 extern void mips_frob_file PARAMS ((void));
 122
 123 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
 124 #define tc_frob_file_after_relocs mips_frob_file_after_relocs
 125 extern void mips_frob_file_after_relocs PARAMS ((void));
 126 #endif
 127
 128 #define tc_fix_adjustable(fixp) mips_fix_adjustable (fixp)
 129 extern int mips_fix_adjustable PARAMS ((struct fix *));
 130
 131 /* Global syms must not be resolved, to support ELF shared libraries.
 132    When generating embedded code, we don't have shared libs.  */
 133 #define EXTERN_FORCE_RELOC                      \
 134   (OUTPUT_FLAVOR == bfd_target_elf_flavour      \
 135    && mips_pic != EMBEDDED_PIC)
 136
 137 /* When generating embedded PIC code we must keep PC relative
 138    relocations.  */
 139 #define TC_FORCE_RELOCATION(fixp) mips_force_relocation (fixp)
 140 extern int mips_force_relocation PARAMS ((struct fix *));
 141
 142 /* Register mask variables.  These are set by the MIPS assembly code
 143    and used by ECOFF and possibly other object file formats.  */
 144 extern unsigned long mips_gprmask;
 145 extern unsigned long mips_cprmask[4];
 146
 147 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
 148
 149 #define elf_tc_final_processing mips_elf_final_processing
 150 extern void mips_elf_final_processing PARAMS ((void));
 151
 152 #define ELF_TC_SPECIAL_SECTIONS \
 153   { ".sdata",   SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL  }, \
 154   { ".sbss",    SHT_NOBITS,     SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL  }, \
 155   { ".lit4",    SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL  }, \
 156   { ".lit8",    SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL  }, \
 157   { ".ucode",   SHT_MIPS_UCODE, 0                                       }, \
 158   { ".mdebug",  SHT_MIPS_DEBUG, 0                                       },
 159 /* Other special sections not generated by the assembler: .reginfo,
 160    .liblist, .conflict, .gptab, .got, .dynamic, .rel.dyn.  */
 161
 162 #endif
 163
 164 extern void md_mips_end PARAMS ((void));
 165 #define md_end()        md_mips_end()
 166
 167 #define USE_GLOBAL_POINTER_OPT  (OUTPUT_FLAVOR == bfd_target_ecoff_flavour \
 168                                  || OUTPUT_FLAVOR == bfd_target_coff_flavour \
 169                                  || OUTPUT_FLAVOR == bfd_target_elf_flavour)
 170
 171 extern void mips_pop_insert PARAMS ((void));
 172 #define md_pop_insert()         mips_pop_insert()
 173
 174 extern void mips_flush_pending_output PARAMS ((void));
 175 #define md_flush_pending_output mips_flush_pending_output
 176
 177 extern void mips_enable_auto_align PARAMS ((void));
 178 #define md_elf_section_change_hook()    mips_enable_auto_align()
 179
 180 #endif /* TC_MIPS */