1 /* This file is tc-sh.h 2 Copyright (C) 1993-2014 Free Software Foundation, Inc. 3 4 This file is part of GAS, the GNU Assembler. 5 6 GAS is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GAS is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GAS; see the file COPYING. If not, write to 18 the Free Software Foundation, 51 Franklin Street - Fifth Floor, 19 Boston, MA 02110-1301, USA. */ 20 21 #define TC_SH 22 23 #define TARGET_ARCH bfd_arch_sh 24 25 /* The type fixS is defined (to struct fix) in write.h, but write.h uses 26 definitions from this file. To avoid problems with including write.h 27 after the "right" definitions, don't; just forward-declare struct fix 28 here. */ 29 struct fix; 30 struct segment_info_struct; 31 struct internal_reloc; 32 33 /* Whether -relax was used. */ 34 extern int sh_relax; 35 36 /* Whether -small was used. */ 37 extern int sh_small; 38 39 /* Don't try to break words. */ 40 #define WORKING_DOT_WORD 41 42 /* We require .long, et. al., to be aligned correctly. */ 43 #define md_cons_align(nbytes) sh_cons_align (nbytes) 44 extern void sh_cons_align (int); 45 46 /* We need to optimize expr with taking account of rs_align_test 47 frags. */ 48 49 #ifdef OBJ_ELF 50 #define md_optimize_expr(l,o,r) sh_optimize_expr (l, o, r) 51 extern int sh_optimize_expr (expressionS *, operatorT, expressionS *); 52 #endif 53 54 /* When relaxing, we need to generate relocations for alignment 55 directives. */ 56 #define HANDLE_ALIGN(frag) sh_handle_align (frag) 57 extern void sh_handle_align (fragS *); 58 59 #define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2) 60 61 /* We need to force out some relocations when relaxing. */ 62 #define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix) 63 extern int sh_force_relocation (struct fix *); 64 65 /* This macro decides whether a particular reloc is an entry in a 66 switch table. It is used when relaxing, because the linker needs 67 to know about all such entries so that it can adjust them if 68 necessary. */ 69 70 #define SWITCH_TABLE(FIX) \ 71 ((FIX)->fx_addsy != NULL \ 72 && (FIX)->fx_subsy != NULL \ 73 && S_GET_SEGMENT ((FIX)->fx_addsy) == text_section \ 74 && S_GET_SEGMENT ((FIX)->fx_subsy) == text_section \ 75 && ((FIX)->fx_r_type == BFD_RELOC_32 \ 76 || (FIX)->fx_r_type == BFD_RELOC_16 \ 77 || (FIX)->fx_r_type == BFD_RELOC_8)) 78 79 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ 80 (! SEG_NORMAL (SEC) \ 81 || TC_FORCE_RELOCATION (FIX) \ 82 || (sh_relax && SWITCH_TABLE (FIX))) 83 84 /* Don't complain when we leave fx_subsy around. */ 85 #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ 86 ((md_register_arithmetic || (SEG) != reg_section) \ 87 && sh_relax && SWITCH_TABLE (FIX)) 88 89 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC) 90 extern long md_pcrel_from_section (struct fix *, segT); 91 92 /* SH_COUNT relocs are allowed outside of frag. 93 The target is also buggy and sets fix size too large for other relocs. */ 94 #define TC_FX_SIZE_SLACK(FIX) \ 95 ((FIX)->fx_r_type == BFD_RELOC_SH_COUNT ? -1 : 2) 96 97 #define IGNORE_NONSTANDARD_ESCAPES 98 99 #define LISTING_HEADER \ 100 (!target_big_endian \ 101 ? "Renesas / SuperH SH GAS Little Endian" \ 102 : "Renesas / SuperH SH GAS Big Endian") 103 104 #define md_operand(x) 105 106 extern const struct relax_type md_relax_table[]; 107 #define TC_GENERIC_RELAX_TABLE md_relax_table 108 109 /* We record, for each section, whether we have most recently output a 110 CODE reloc or a DATA reloc. */ 111 struct sh_segment_info_type 112 { 113 int in_code : 1; 114 }; 115 #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type 116 117 /* We call a routine to emit a reloc for a label, so that the linker 118 can align loads and stores without crossing a label. */ 119 extern void sh_frob_label (symbolS *); 120 #define tc_frob_label(sym) sh_frob_label (sym) 121 122 /* We call a routine to flush pending output in order to output a DATA 123 reloc when required. */ 124 extern void sh_flush_pending_output (void); 125 #define md_flush_pending_output() sh_flush_pending_output () 126 127 #define tc_frob_file_before_adjust sh_frob_file 128 extern void sh_frob_file (void); 129 130 131 #ifdef OBJ_COFF 132 /* COFF specific definitions. */ 133 134 #define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG) 135 136 #define tc_coff_symbol_emit_hook(a) ; /* Not used. */ 137 138 #define TC_KEEP_FX_OFFSET 1 139 140 #define SEG_NAME(SEG) segment_name (SEG) 141 142 /* We align most sections to a 16 byte boundary. */ 143 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ 144 (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \ 145 ? 0 \ 146 : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \ 147 || strcmp (SEG_NAME (SEG), ".ctors") == 0 \ 148 || strcmp (SEG_NAME (SEG), ".dtors") == 0) \ 149 ? 2 \ 150 : (sh_small ? 2 : 4))) 151 152 #endif /* OBJ_COFF */ 153 154 #ifdef OBJ_ELF 155 /* ELF specific definitions. */ 156 157 /* Whether or not the target is big endian. */ 158 extern int target_big_endian; 159 #ifdef TE_LINUX 160 #define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux") 161 #elif defined(TE_NetBSD) 162 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd") 163 #elif defined TARGET_SYMBIAN 164 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-symbian" : "elf32-sh-symbian") 165 #elif defined (TE_VXWORKS) 166 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-vxworks" : "elf32-sh-vxworks") 167 #elif defined (TE_UCLINUX) 168 #define TARGET_FORMAT sh_uclinux_target_format () 169 extern const char * sh_uclinux_target_format (void); 170 #else 171 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh") 172 #endif 173 174 #define elf_tc_final_processing sh_elf_final_processing 175 extern void sh_elf_final_processing (void); 176 177 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs. */ 178 179 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 180 181 /* This is the relocation type for direct references to 182 GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such 183 as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed 184 normally with the regular expressions. The fixup specified here 185 when used at runtime implies that we should add the address of the 186 GOT to the specified location, and as a result we have simplified 187 the expression into something we can use. */ 188 #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC 189 190 #define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX) 191 extern bfd_boolean sh_fix_adjustable (struct fix *); 192 193 /* Values passed to md_apply_fix don't include symbol values. */ 194 #define MD_APPLY_SYM_VALUE(FIX) 0 195 196 /* This expression evaluates to true if the relocation is for a local object 197 for which we still want to do the relocation at runtime. False if we 198 are willing to perform this relocation while building the .o file. 199 200 We can't resolve references to the GOT or the PLT when creating the 201 object file, since these tables are only created by the linker. 202 Also, if the symbol is global, weak, common or not defined, the 203 assembler can't compute the appropriate reloc, since its location 204 can only be determined at link time. */ 205 206 #define TC_FORCE_RELOCATION_LOCAL(FIX) \ 207 (!(FIX)->fx_pcrel \ 208 || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 209 || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \ 210 || (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC \ 211 || TC_FORCE_RELOCATION (FIX)) 212 213 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ 214 ((!md_register_arithmetic && (SEG) == reg_section) \ 215 || (sh_relax && SWITCH_TABLE (FIX))) 216 217 /* This keeps the subtracted symbol around, for use by PLT_PCREL 218 relocs. */ 219 #define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \ 220 ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 221 || (!md_register_arithmetic && (SEG) == reg_section)) 222 223 /* Don't complain when we leave fx_subsy around. */ 224 #undef TC_VALIDATE_FIX_SUB 225 #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ 226 ((md_register_arithmetic || (SEG) != reg_section) \ 227 && ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 228 || (sh_relax && SWITCH_TABLE (FIX)))) 229 230 #define md_parse_name(name, exprP, mode, nextcharP) \ 231 sh_parse_name ((name), (exprP), (mode), (nextcharP)) 232 int sh_parse_name (char const *, expressionS *, 233 enum expr_mode, char *); 234 235 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \ 236 sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC)) 237 void sh_cons_fix_new (fragS *, int, int, expressionS *, 238 bfd_reloc_code_real_type); 239 240 /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT 241 symbols. The relocation type is stored in X_md. */ 242 #define O_PIC_reloc O_md1 243 244 #define TARGET_USE_CFIPOP 1 245 246 #define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions 247 extern void sh_cfi_frame_initial_instructions (void); 248 249 #define tc_regname_to_dw2regnum sh_regname_to_dw2regnum 250 extern int sh_regname_to_dw2regnum (char *); 251 252 /* All SH instructions are multiples of 16 bits. */ 253 #define DWARF2_LINE_MIN_INSN_LENGTH 2 254 #define DWARF2_DEFAULT_RETURN_COLUMN 17 255 #define DWARF2_CIE_DATA_ALIGNMENT (-4) 256 257 #endif /* OBJ_ELF */ 258 259 #define H_TICK_HEX 1 260
