1 /* tc-mips.h -- header file for tc-mips.c. 2 Copyright 1993, 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2003 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 #define TC_MIPS 27 28 struct frag; 29 struct expressionS; 30 31 /* Default to big endian. */ 32 #ifndef TARGET_BYTES_BIG_ENDIAN 33 #define TARGET_BYTES_BIG_ENDIAN 1 34 #endif 35 36 #define TARGET_ARCH bfd_arch_mips 37 38 #define WORKING_DOT_WORD 1 39 #define OLD_FLOAT_READS 40 #define REPEAT_CONS_EXPRESSIONS 41 #define RELOC_EXPANSION_POSSIBLE 42 #define MAX_RELOC_EXPANSION 3 43 #define LOCAL_LABELS_FB 1 44 45 /* Maximum symbol offset that can be encoded in a BFD_RELOC_GPREL16 46 relocation. */ 47 #define MAX_GPREL_OFFSET (0x7FF0) 48 49 #define md_relax_frag(segment, fragp, stretch) \ 50 mips_relax_frag(segment, fragp, stretch) 51 extern int mips_relax_frag (asection *, struct frag *, long); 52 53 #define md_undefined_symbol(name) (0) 54 #define md_operand(x) 55 56 extern void mips_handle_align (struct frag *); 57 #define HANDLE_ALIGN(fragp) mips_handle_align (fragp) 58 59 #define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2) 60 61 /* We permit PC relative difference expressions when generating 62 embedded PIC code. */ 63 #define DIFF_EXPR_OK 64 65 /* Tell assembler that we have an itbl_mips.h header file to include. */ 66 #define HAVE_ITBL_CPU 67 68 /* The endianness of the target format may change based on command 69 line arguments. */ 70 #define TARGET_FORMAT mips_target_format() 71 extern const char *mips_target_format (void); 72 73 /* MIPS PIC level. */ 74 75 enum mips_pic_level 76 { 77 /* Do not generate PIC code. */ 78 NO_PIC, 79 80 /* Generate PIC code as in the SVR4 MIPS ABI. */ 81 SVR4_PIC, 82 83 /* Generate PIC code without using a global offset table: the data 84 segment has a maximum size of 64K, all data references are off 85 the $gp register, and all text references are PC relative. This 86 is used on some embedded systems. */ 87 EMBEDDED_PIC 88 }; 89 90 extern enum mips_pic_level mips_pic; 91 92 struct mips_cl_insn 93 { 94 unsigned long insn_opcode; 95 const struct mips_opcode *insn_mo; 96 /* The next two fields are used when generating mips16 code. */ 97 bfd_boolean use_extend; 98 unsigned short extend; 99 }; 100 101 extern int tc_get_register (int frame); 102 103 #define md_after_parse_args() mips_after_parse_args() 104 extern void mips_after_parse_args (void); 105 106 #define tc_init_after_args() mips_init_after_args() 107 extern void mips_init_after_args (void); 108 109 #define md_parse_long_option(arg) mips_parse_long_option (arg) 110 extern int mips_parse_long_option (const char *); 111 112 #define tc_frob_label(sym) mips_define_label (sym) 113 extern void mips_define_label (symbolS *); 114 115 #define tc_frob_file_before_adjust() mips_frob_file_before_adjust () 116 extern void mips_frob_file_before_adjust (void); 117 118 #define tc_frob_file_before_fix() mips_frob_file () 119 extern void mips_frob_file (void); 120 121 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) 122 #define tc_frob_file_after_relocs mips_frob_file_after_relocs 123 extern void mips_frob_file_after_relocs (void); 124 #endif 125 126 #define tc_fix_adjustable(fixp) mips_fix_adjustable (fixp) 127 extern int mips_fix_adjustable (struct fix *); 128 129 /* Values passed to md_apply_fix3 don't include symbol values. */ 130 #define MD_APPLY_SYM_VALUE(FIX) 0 131 132 /* 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 (struct fix *); 142 143 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \ 144 (! SEG_NORMAL (SEG) || mips_force_relocation (FIX)) 145 146 /* We use this to turn branches to global symbols into branches to 147 local symbols, so that they can be simplified. */ 148 #define TC_VALIDATE_FIX(fixp, this_segment, skip_label) \ 149 do \ 150 if (! mips_validate_fix ((fixp), (this_segment))) \ 151 goto skip_label; \ 152 while (0) 153 extern int mips_validate_fix (struct fix *, asection *); 154 155 /* Register mask variables. These are set by the MIPS assembly code 156 and used by ECOFF and possibly other object file formats. */ 157 extern unsigned long mips_gprmask; 158 extern unsigned long mips_cprmask[4]; 159 160 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) 161 162 #define elf_tc_final_processing mips_elf_final_processing 163 extern void mips_elf_final_processing (void); 164 165 #endif 166 167 extern void md_mips_end (void); 168 #define md_end() md_mips_end() 169 170 #define USE_GLOBAL_POINTER_OPT (OUTPUT_FLAVOR == bfd_target_ecoff_flavour \ 171 || OUTPUT_FLAVOR == bfd_target_coff_flavour \ 172 || OUTPUT_FLAVOR == bfd_target_elf_flavour) 173 174 extern void mips_pop_insert (void); 175 #define md_pop_insert() mips_pop_insert() 176 177 extern void mips_flush_pending_output (void); 178 #define md_flush_pending_output mips_flush_pending_output 179 180 extern void mips_enable_auto_align (void); 181 #define md_elf_section_change_hook() mips_enable_auto_align() 182 183 extern enum dwarf2_format mips_dwarf2_format (void); 184 #define DWARF2_FORMAT() mips_dwarf2_format () 185 186 #define DWARF2_ADDR_SIZE(bfd) mips_dwarf2_addr_size () 187 188 #define TARGET_USE_CFIPOP 1 189 190 #define tc_cfi_frame_initial_instructions mips_cfi_frame_initial_instructions 191 extern void mips_cfi_frame_initial_instructions (void); 192 193 #define DWARF2_DEFAULT_RETURN_COLUMN 31 194 #define DWARF2_CIE_DATA_ALIGNMENT -4 195 196 #define tc_regname_to_dw2regnum tc_mips_regname_to_dw2regnum 197 extern int tc_mips_regname_to_dw2regnum (char *regname); 198 199 #endif /* TC_MIPS */ 200