1 /* m88k.h -- Assembler for the Motorola 88000 2 Contributed by Devon Bowen of Buffalo University 3 and Torbjorn Granlund of the Swedish Institute of Computer Science. 4 Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000, 5 2002 Free Software Foundation, Inc. 6 7 This file is part of GAS, the GNU Assembler. 8 9 GAS is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2, or (at your option) 12 any later version. 13 14 GAS is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GAS; see the file COPYING. If not, write to the Free 21 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 22 02111-1307, USA. */ 23 24 #define TC_M88K 25 26 #define TARGET_BYTES_BIG_ENDIAN 1 27 #undef REGISTER_PREFIX 28 29 #ifdef OBJ_AOUT 30 #ifdef TE_OpenBSD 31 #define TARGET_FORMAT "a.out-m88k-openbsd" 32 #endif 33 #endif 34 35 #ifdef M88KCOFF 36 #define BFD_ARCH bfd_arch_m88k 37 #define COFF_MAGIC MC88OMAGIC 38 #define COFF_FLAGS F_AR32W 39 #endif 40 41 #ifdef OBJ_ELF 42 #define BFD_ARCH bfd_arch_m88k 43 #define TARGET_ARCH bfd_arch_m88k 44 #define TARGET_FORMAT "elf32-m88k" 45 #if defined(TE_OpenBSD) 46 #define REGISTER_PREFIX '%' 47 #else 48 #define REGISTER_PREFIX '#' 49 #endif 50 #endif 51 52 #define CUSTOM_RELOC_FORMAT 53 54 /* different type of relocation available in the m88k */ 55 56 #ifdef BFD_ASSEMBLER 57 #include "bfd.h" 58 #define m88k_reloc_type bfd_reloc_code_real 59 #else 60 enum m88k_reloc_type 61 { 62 RELOC_LO16, /* lo16(sym) */ 63 RELOC_HI16, /* hi16(sym) */ 64 RELOC_PC16, /* bb0, bb1, bcnd */ 65 RELOC_PC26, /* br, bsr */ 66 RELOC_32, /* jump tables, etc */ 67 RELOC_IW16, /* global access through linker regs 28 */ 68 NO_RELOC 69 }; 70 71 #define NEED_FX_R_TYPE 72 #ifdef M88KCOFF 73 #define TC_KEEP_FX_OFFSET 74 #endif 75 #define TC_CONS_RELOC RELOC_32 76 77 struct reloc_info_m88k 78 { 79 unsigned long int r_address; 80 unsigned int r_symbolnum:24; 81 unsigned int r_extern:1; 82 unsigned int r_pad:3; 83 enum m88k_reloc_type r_type:4; 84 long int r_addend; 85 }; 86 87 #define relocation_info reloc_info_m88k 88 #endif /* BFD_ASSEMBLER */ 89 90 #ifdef OBJ_ELF 91 92 /* This is used to recognize #abdiff, #got_rel and #plt symbols. 93 The relocation type is stored in X_md. */ 94 #define md_parse_name m88k_parse_name 95 extern int m88k_parse_name (const char *, expressionS *, char *); 96 97 /* This expression evaluates to true if the relocation is for a local 98 object for which we still want to do the relocation at runtime. 99 False if we are willing to perform this relocation while building 100 the .o file. Only concerns pcrel relocs. */ 101 102 #define TC_FORCE_RELOCATION_LOCAL(FIX) \ 103 (!(FIX)->fx_pcrel \ 104 || (FIX)->fx_plt \ 105 || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 106 || TC_FORCE_RELOCATION (FIX)) 107 108 /* Keep relocations relative to the GOT, or non-PC relative. */ 109 #define tc_fix_adjustable(FIX) m88k_fix_adjustable (FIX) 110 extern int m88k_fix_adjustable PARAMS ((struct fix *)); 111 112 #endif /* OBJ_ELF */ 113 114 #ifndef OBJ_ELF 115 /* The m88k uses '@' to start local labels, except on ELF. */ 116 #define LEX_AT (LEX_BEGIN_NAME | LEX_NAME) 117 118 #ifndef BFD_ASSEMBLER 119 #define LOCAL_LABEL(name) \ 120 ((name[0] =='@' && (name [1] == 'L' || name [1] == '.')) \ 121 || (name[0] == 'L' && name[1] == '0' && name[2] == '\001')) 122 #endif 123 #endif /* OBJ_ELF */ 124 125 #if !defined(OBJ_ELF) || !defined(TE_OpenBSD) 126 /* The m88k uses pseudo-ops with no leading period, except on OpenBSD ELF. */ 127 #define NO_PSEUDO_DOT 1 128 #endif 129 130 /* Don't warn on word overflow; it happens on %hi relocs. */ 131 #undef WARN_SIGNED_OVERFLOW_WORD 132 133 #define md_convert_frag(b,s,f) {as_fatal (_("m88k convert_frag\n"));} 134 135 /* We don't need to do anything special for undefined symbols. */ 136 #define md_undefined_symbol(s) 0 137 138 /* We have no special operand handling. */ 139 #define md_operand(e) 140 141 #define tc_aout_pre_write_hook(x) do { } while (0) 142 #define tc_crawl_symbol_chain(a) do { } while (0) 143 144 #ifdef M88KCOFF 145 146 /* Whether a reloc should be output. */ 147 #define TC_COUNT_RELOC(fixp) ((fixp)->fx_addsy != NULL) 148 149 /* Get the BFD reloc type to use for a gas fixS structure. */ 150 #define TC_COFF_FIX2RTYPE(fixp) tc_coff_fix2rtype (fixp) 151 152 /* No special hook needed for symbols. */ 153 #define tc_coff_symbol_emit_hook(s) 154 155 /* Align sections to a four byte boundary. */ 156 #ifndef max 157 #define max(a,b) (((a) > (b)) ? (a) : (b)) 158 #endif 159 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) max (section_alignment[(int) (SEG)], 4) 160 161 #endif /* M88KCOFF */ 162 163 /* Fill in rs_align_code fragments. */ 164 extern void m88k_handle_align PARAMS ((fragS *)); 165 #define HANDLE_ALIGN(frag) m88k_handle_align (frag) 166 167 #define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4) 168 169 #define elf_tc_final_processing m88k_elf_final_processing 170 extern void m88k_elf_final_processing (void); 171 172 /* word pseudo outputs 32-bit values, no risk of ``broken words'' */ 173 #define WORKING_DOT_WORD 174