1 /* This file is tc-sh.h 2 Copyright (C) 1993-2021 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 (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, 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 91 /* SH_COUNT relocs are allowed outside of frag. 92 The target is also buggy and sets fix size too large for other relocs. */ 93 #define TC_FX_SIZE_SLACK(FIX) \ 94 ((FIX)->fx_r_type == BFD_RELOC_SH_COUNT ? -1 : 2) 95 96 #define IGNORE_NONSTANDARD_ESCAPES 97 98 #define LISTING_HEADER \ 99 (!target_big_endian \ 100 ? "Renesas / SuperH SH GAS Little Endian" \ 101 : "Renesas / SuperH SH GAS Big Endian") 102 103 #define md_operand(x) 104 105 extern const struct relax_type md_relax_table[]; 106 #define TC_GENERIC_RELAX_TABLE md_relax_table 107 108 /* We record, for each section, whether we have most recently output a 109 CODE reloc or a DATA reloc. */ 110 struct sh_segment_info_type 111 { 112 int in_code : 1; 113 }; 114 #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type 115 116 /* We call a routine to emit a reloc for a label, so that the linker 117 can align loads and stores without crossing a label. */ 118 extern void sh_frob_label (symbolS *); 119 #define tc_frob_label(sym) sh_frob_label (sym) 120 121 /* We call a routine to flush pending output in order to output a DATA 122 reloc when required. */ 123 extern void sh_flush_pending_output (void); 124 #define md_flush_pending_output() sh_flush_pending_output () 125 126 #define tc_frob_file_before_adjust sh_frob_file 127 extern void sh_frob_file (void); 128 129 130 #ifdef OBJ_COFF 131 /* COFF specific definitions. */ 132 133 #define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG) 134 135 #define tc_coff_symbol_emit_hook(a) ; /* Not used. */ 136 137 #define TC_KEEP_FX_OFFSET 1 138 139 #define SEG_NAME(SEG) segment_name (SEG) 140 141 /* We align most sections to a 16 byte boundary. */ 142 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ 143 (startswith (SEG_NAME (SEG), ".stabstr") \ 144 ? 0 \ 145 : ((startswith (SEG_NAME (SEG), ".stab") \ 146 || strcmp (SEG_NAME (SEG), ".ctors") == 0 \ 147 || strcmp (SEG_NAME (SEG), ".dtors") == 0) \ 148 ? 2 \ 149 : (sh_small ? 2 : 4))) 150 151 #endif /* OBJ_COFF */ 152 153 #ifdef OBJ_ELF 154 /* ELF specific definitions. */ 155 156 /* Whether or not the target is big endian. */ 157 extern int target_big_endian; 158 #ifdef TE_LINUX 159 #define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux") 160 #elif defined(TE_NetBSD) 161 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd") 162 #elif defined (TE_VXWORKS) 163 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-vxworks" : "elf32-sh-vxworks") 164 #elif defined (TE_UCLINUX) 165 #define TARGET_FORMAT sh_uclinux_target_format () 166 extern const char * sh_uclinux_target_format (void); 167 #else 168 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh") 169 #endif 170 171 #define elf_tc_final_processing sh_elf_final_processing 172 extern void sh_elf_final_processing (void); 173 174 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs. */ 175 176 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 177 178 /* This is the relocation type for direct references to 179 GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such 180 as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed 181 normally with the regular expressions. The fixup specified here 182 when used at runtime implies that we should add the address of the 183 GOT to the specified location, and as a result we have simplified 184 the expression into something we can use. */ 185 #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC 186 187 #define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX) 188 extern bool sh_fix_adjustable (struct fix *); 189 190 /* Values passed to md_apply_fix don't include symbol values. */ 191 #define MD_APPLY_SYM_VALUE(FIX) 0 192 193 /* This expression evaluates to true if the relocation is for a local object 194 for which we still want to do the relocation at runtime. False if we 195 are willing to perform this relocation while building the .o file. 196 197 We can't resolve references to the GOT or the PLT when creating the 198 object file, since these tables are only created by the linker. 199 Also, if the symbol is global, weak, common or not defined, the 200 assembler can't compute the appropriate reloc, since its location 201 can only be determined at link time. */ 202 203 #define TC_FORCE_RELOCATION_LOCAL(FIX) \ 204 (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \ 205 || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 206 || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \ 207 || (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC) 208 209 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ 210 ((!md_register_arithmetic && (SEG) == reg_section) \ 211 || (sh_relax && SWITCH_TABLE (FIX))) 212 213 /* This keeps the subtracted symbol around, for use by PLT_PCREL 214 relocs. */ 215 #define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \ 216 ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 217 || (!md_register_arithmetic && (SEG) == reg_section)) 218 219 /* Don't complain when we leave fx_subsy around. */ 220 #undef TC_VALIDATE_FIX_SUB 221 #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ 222 ((md_register_arithmetic || (SEG) != reg_section) \ 223 && ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 224 || (sh_relax && SWITCH_TABLE (FIX)))) 225 226 #define md_parse_name(name, exprP, mode, nextcharP) \ 227 sh_parse_name ((name), (exprP), (mode), (nextcharP)) 228 int sh_parse_name (char const *, expressionS *, 229 enum expr_mode, char *); 230 231 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \ 232 sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC)) 233 void sh_cons_fix_new (fragS *, int, int, expressionS *, 234 bfd_reloc_code_real_type); 235 236 /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT 237 symbols. The relocation type is stored in X_md. */ 238 #define O_PIC_reloc O_md1 239 240 #define TARGET_USE_CFIPOP 1 241 242 #define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions 243 extern void sh_cfi_frame_initial_instructions (void); 244 245 #define tc_regname_to_dw2regnum sh_regname_to_dw2regnum 246 extern int sh_regname_to_dw2regnum (char *); 247 248 /* All SH instructions are multiples of 16 bits. */ 249 #define DWARF2_LINE_MIN_INSN_LENGTH 2 250 #define DWARF2_DEFAULT_RETURN_COLUMN 17 251 #define DWARF2_CIE_DATA_ALIGNMENT (-4) 252 253 #endif /* OBJ_ELF */ 254 255 #define H_TICK_HEX 1 256