1/* This file is tc-sh.h 2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 3 2003 Free Software Foundation, Inc. 4 5 This file is part of GAS, the GNU Assembler. 6 7 GAS is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2, or (at your option) 10 any later version. 11 12 GAS is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GAS; see the file COPYING. If not, write to 19 the Free Software Foundation, 59 Temple Place - Suite 330, 20 Boston, MA 02111-1307, USA. */ 21 22#define TC_SH 23 24#define TARGET_ARCH bfd_arch_sh 25 26#if ANSI_PROTOTYPES 27/* The type fixS is defined (to struct fix) in write.h, but write.h uses 28 definitions from this file. To avoid problems with including write.h 29 after the "right" definitions, don't; just forward-declare struct fix 30 here. */ 31struct fix; 32struct segment_info_struct; 33struct internal_reloc; 34#endif 35 36/* Whether -relax was used. */ 37extern int sh_relax; 38 39/* Whether -small was used. */ 40extern int sh_small; 41 42/* Don't try to break words. */ 43#define WORKING_DOT_WORD 44 45/* We require .long, et. al., to be aligned correctly. */ 46#define md_cons_align(nbytes) sh_cons_align (nbytes) 47extern void sh_cons_align (int); 48 49/* When relaxing, we need to generate relocations for alignment 50 directives. */ 51#define HANDLE_ALIGN(frag) sh_handle_align (frag) 52extern void sh_handle_align (fragS *); 53 54#define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2) 55 56/* We need to force out some relocations when relaxing. */ 57#define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix) 58extern int sh_force_relocation (struct fix *); 59 60/* This macro decides whether a particular reloc is an entry in a 61 switch table. It is used when relaxing, because the linker needs 62 to know about all such entries so that it can adjust them if 63 necessary. */ 64 65#ifdef BFD_ASSEMBLER 66#define SWITCH_TABLE_CONS(FIX) (0) 67#else 68#define SWITCH_TABLE_CONS(FIX) \ 69 ((FIX)->fx_r_type == 0 \ 70 && ((FIX)->fx_size == 2 \ 71 || (FIX)->fx_size == 1 \ 72 || (FIX)->fx_size == 4)) 73#endif 74 75#define SWITCH_TABLE(FIX) \ 76 ((FIX)->fx_addsy != NULL \ 77 && (FIX)->fx_subsy != NULL \ 78 && S_GET_SEGMENT ((FIX)->fx_addsy) == text_section \ 79 && S_GET_SEGMENT ((FIX)->fx_subsy) == text_section \ 80 && ((FIX)->fx_r_type == BFD_RELOC_32 \ 81 || (FIX)->fx_r_type == BFD_RELOC_16 \ 82 || (FIX)->fx_r_type == BFD_RELOC_8 \ 83 || SWITCH_TABLE_CONS (FIX))) 84 85#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ 86 (! SEG_NORMAL (SEC) \ 87 || TC_FORCE_RELOCATION (FIX) \ 88 || (sh_relax && SWITCH_TABLE (FIX))) 89 90/* Don't complain when we leave fx_subsy around. */ 91#define TC_VALIDATE_FIX_SUB(FIX) \ 92 (sh_relax && SWITCH_TABLE (FIX)) 93 94#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC) 95extern long md_pcrel_from_section (struct fix *, segT); 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 106extern 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. */ 111struct 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. */ 119extern void sh_frob_label (void); 120#define tc_frob_label(sym) sh_frob_label () 121 122/* We call a routine to flush pending output in order to output a DATA 123 reloc when required. */ 124extern void sh_flush_pending_output (void); 125#define md_flush_pending_output() sh_flush_pending_output () 126 127#ifdef BFD_ASSEMBLER 128#define tc_frob_file_before_adjust sh_frob_file 129#else 130#define tc_frob_file sh_frob_file 131#endif 132extern void sh_frob_file (void); 133 134 135#ifdef OBJ_COFF 136/* COFF specific definitions. */ 137 138#define DO_NOT_STRIP 0 139 140/* This macro translates between an internal fix and a coff reloc type. */ 141#define TC_COFF_FIX2RTYPE(fix) ((fix)->fx_r_type) 142 143#define BFD_ARCH TARGET_ARCH 144 145#define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG) 146 147/* We need to write out relocs which have not been completed. */ 148#define TC_COUNT_RELOC(fix) ((fix)->fx_addsy != NULL) 149 150#define TC_RELOC_MANGLE(seg, fix, int, paddr) \ 151 sh_coff_reloc_mangle ((seg), (fix), (int), (paddr)) 152extern void sh_coff_reloc_mangle 153 (struct segment_info_struct *, struct fix *, 154 struct internal_reloc *, unsigned int); 155 156#define tc_coff_symbol_emit_hook(a) ; /* not used */ 157 158#define NEED_FX_R_TYPE 1 159 160#define TC_KEEP_FX_OFFSET 1 161 162#define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag) 163extern int tc_coff_sizemachdep (fragS *); 164 165#ifdef BFD_ASSEMBLER 166#define SEG_NAME(SEG) segment_name (SEG) 167#else 168#define SEG_NAME(SEG) obj_segment_name (SEG) 169#endif 170 171/* We align most sections to a 16 byte boundary. */ 172#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ 173 (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \ 174 ? 0 \ 175 : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \ 176 || strcmp (SEG_NAME (SEG), ".ctors") == 0 \ 177 || strcmp (SEG_NAME (SEG), ".dtors") == 0) \ 178 ? 2 \ 179 : (sh_small ? 2 : 4))) 180 181#endif /* OBJ_COFF */ 182 183#ifdef OBJ_ELF 184/* ELF specific definitions. */ 185 186/* Whether or not the target is big endian */ 187extern int target_big_endian; 188#ifdef TE_LINUX 189#define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux") 190#elif defined(TE_NetBSD) 191#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd") 192#elif defined(TE_OpenBSD) 193#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-obsd" : "elf32-sh-obsd") 194#else 195#define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh") 196#endif 197 198#define elf_tc_final_processing sh_elf_final_processing 199extern void sh_elf_final_processing (void); 200 201#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 202 203#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 204 205/* This is the relocation type for direct references to 206 GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such 207 as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed 208 normally with the regular expressions. The fixup specified here 209 when used at runtime implies that we should add the address of the 210 GOT to the specified location, and as a result we have simplified 211 the expression into something we can use. */ 212#define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC 213 214#define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX) 215extern bfd_boolean sh_fix_adjustable (struct fix *); 216 217/* Values passed to md_apply_fix3 don't include symbol values. */ 218#define MD_APPLY_SYM_VALUE(FIX) 0 219 220/* This expression evaluates to true if the relocation is for a local object 221 for which we still want to do the relocation at runtime. False if we 222 are willing to perform this relocation while building the .o file. 223 224 We can't resolve references to the GOT or the PLT when creating the 225 object file, since these tables are only created by the linker. 226 Also, if the symbol is global, weak, common or not defined, the 227 assembler can't compute the appropriate reloc, since its location 228 can only be determined at link time. */ 229 230#define TC_FORCE_RELOCATION_LOCAL(FIX) \ 231 (!(FIX)->fx_pcrel \ 232 || (FIX)->fx_plt \ 233 || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 234 || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \ 235 || (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC \ 236 || TC_FORCE_RELOCATION (FIX)) 237 238#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) (sh_relax && SWITCH_TABLE (FIX)) 239 240/* This keeps the subtracted symbol around, for use by PLT_PCREL 241 relocs. */ 242#define TC_FORCE_RELOCATION_SUB_ABS(FIX) \ 243 ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL) 244 245/* Don't complain when we leave fx_subsy around. */ 246#undef TC_VALIDATE_FIX_SUB 247#define TC_VALIDATE_FIX_SUB(FIX) \ 248 ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ 249 || (sh_relax && SWITCH_TABLE (FIX))) 250 251#define md_parse_name(name, exprP, nextcharP) \ 252 sh_parse_name ((name), (exprP), (nextcharP)) 253int sh_parse_name (char const *name, expressionS *exprP, char *nextchar); 254 255#define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \ 256 sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP)) 257void sh_cons_fix_new (fragS *, int, int, expressionS *); 258 259/* This is used to construct expressions out of @GOTOFF, @PLT and @GOT 260 symbols. The relocation type is stored in X_md. */ 261#define O_PIC_reloc O_md1 262 263#define TARGET_USE_CFIPOP 1 264 265#define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions 266extern void sh_cfi_frame_initial_instructions (void); 267 268#define tc_regname_to_dw2regnum sh_regname_to_dw2regnum 269extern int sh_regname_to_dw2regnum (const char *regname); 270 271/* All SH instructions are multiples of 16 bits. */ 272#define DWARF2_LINE_MIN_INSN_LENGTH 2 273#define DWARF2_DEFAULT_RETURN_COLUMN 17 274#define DWARF2_CIE_DATA_ALIGNMENT -4 275 276#endif /* OBJ_ELF */ 277