| 1 | /* This file is tc-sh.h |
| 2 | Copyright (C) 1993-2019 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 | 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 (TE_VXWORKS) |
| 164 | #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-vxworks" : "elf32-sh-vxworks") |
| 165 | #elif defined (TE_UCLINUX) |
| 166 | #define TARGET_FORMAT sh_uclinux_target_format () |
| 167 | extern const char * sh_uclinux_target_format (void); |
| 168 | #else |
| 169 | #define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh") |
| 170 | #endif |
| 171 | |
| 172 | #define elf_tc_final_processing sh_elf_final_processing |
| 173 | extern void sh_elf_final_processing (void); |
| 174 | |
| 175 | #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs. */ |
| 176 | |
| 177 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" |
| 178 | |
| 179 | /* This is the relocation type for direct references to |
| 180 | GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such |
| 181 | as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed |
| 182 | normally with the regular expressions. The fixup specified here |
| 183 | when used at runtime implies that we should add the address of the |
| 184 | GOT to the specified location, and as a result we have simplified |
| 185 | the expression into something we can use. */ |
| 186 | #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC |
| 187 | |
| 188 | #define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX) |
| 189 | extern bfd_boolean sh_fix_adjustable (struct fix *); |
| 190 | |
| 191 | /* Values passed to md_apply_fix don't include symbol values. */ |
| 192 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
| 193 | |
| 194 | /* This expression evaluates to true if the relocation is for a local object |
| 195 | for which we still want to do the relocation at runtime. False if we |
| 196 | are willing to perform this relocation while building the .o file. |
| 197 | |
| 198 | We can't resolve references to the GOT or the PLT when creating the |
| 199 | object file, since these tables are only created by the linker. |
| 200 | Also, if the symbol is global, weak, common or not defined, the |
| 201 | assembler can't compute the appropriate reloc, since its location |
| 202 | can only be determined at link time. */ |
| 203 | |
| 204 | #define TC_FORCE_RELOCATION_LOCAL(FIX) \ |
| 205 | (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \ |
| 206 | || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ |
| 207 | || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \ |
| 208 | || (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC) |
| 209 | |
| 210 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ |
| 211 | ((!md_register_arithmetic && (SEG) == reg_section) \ |
| 212 | || (sh_relax && SWITCH_TABLE (FIX))) |
| 213 | |
| 214 | /* This keeps the subtracted symbol around, for use by PLT_PCREL |
| 215 | relocs. */ |
| 216 | #define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \ |
| 217 | ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ |
| 218 | || (!md_register_arithmetic && (SEG) == reg_section)) |
| 219 | |
| 220 | /* Don't complain when we leave fx_subsy around. */ |
| 221 | #undef TC_VALIDATE_FIX_SUB |
| 222 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ |
| 223 | ((md_register_arithmetic || (SEG) != reg_section) \ |
| 224 | && ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ |
| 225 | || (sh_relax && SWITCH_TABLE (FIX)))) |
| 226 | |
| 227 | #define md_parse_name(name, exprP, mode, nextcharP) \ |
| 228 | sh_parse_name ((name), (exprP), (mode), (nextcharP)) |
| 229 | int sh_parse_name (char const *, expressionS *, |
| 230 | enum expr_mode, char *); |
| 231 | |
| 232 | #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \ |
| 233 | sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC)) |
| 234 | void sh_cons_fix_new (fragS *, int, int, expressionS *, |
| 235 | bfd_reloc_code_real_type); |
| 236 | |
| 237 | /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT |
| 238 | symbols. The relocation type is stored in X_md. */ |
| 239 | #define O_PIC_reloc O_md1 |
| 240 | |
| 241 | #define TARGET_USE_CFIPOP 1 |
| 242 | |
| 243 | #define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions |
| 244 | extern void sh_cfi_frame_initial_instructions (void); |
| 245 | |
| 246 | #define tc_regname_to_dw2regnum sh_regname_to_dw2regnum |
| 247 | extern int sh_regname_to_dw2regnum (char *); |
| 248 | |
| 249 | /* All SH instructions are multiples of 16 bits. */ |
| 250 | #define DWARF2_LINE_MIN_INSN_LENGTH 2 |
| 251 | #define DWARF2_DEFAULT_RETURN_COLUMN 17 |
| 252 | #define DWARF2_CIE_DATA_ALIGNMENT (-4) |
| 253 | |
| 254 | #endif /* OBJ_ELF */ |
| 255 | |
| 256 | #define H_TICK_HEX 1 |