| 1 | /* This file is tc-sh.h |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
| 3 | 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 | struct segment_info_struct; |
| 28 | struct internal_reloc; |
| 29 | #endif |
| 30 | |
| 31 | /* Whether -relax was used. */ |
| 32 | extern int sh_relax; |
| 33 | |
| 34 | /* Whether -small was used. */ |
| 35 | extern int sh_small; |
| 36 | |
| 37 | /* Don't try to break words. */ |
| 38 | #define WORKING_DOT_WORD |
| 39 | |
| 40 | /* All SH instructions are multiples of 16 bits. */ |
| 41 | #define DWARF2_LINE_MIN_INSN_LENGTH 2 |
| 42 | |
| 43 | /* We require .long, et. al., to be aligned correctly. */ |
| 44 | #define md_cons_align(nbytes) sh_cons_align (nbytes) |
| 45 | extern void sh_cons_align PARAMS ((int)); |
| 46 | |
| 47 | /* When relaxing, we need to generate relocations for alignment |
| 48 | directives. */ |
| 49 | #define HANDLE_ALIGN(frag) sh_handle_align (frag) |
| 50 | extern void sh_handle_align PARAMS ((fragS *)); |
| 51 | |
| 52 | #define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2) |
| 53 | |
| 54 | /* We need to force out some relocations when relaxing. */ |
| 55 | #define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix) |
| 56 | |
| 57 | /* The type fixS is defined (to struct fix) in write.h, but write.h uses |
| 58 | definitions from this file. To avoid problems with including write.h |
| 59 | after the "right" definitions, don't; just forward-declare struct fix |
| 60 | here. */ |
| 61 | struct fix; |
| 62 | extern int sh_force_relocation PARAMS ((struct fix *)); |
| 63 | |
| 64 | #ifdef OBJ_ELF |
| 65 | #define obj_fix_adjustable(fixP) sh_fix_adjustable(fixP) |
| 66 | struct fix; |
| 67 | extern boolean sh_fix_adjustable PARAMS ((struct fix *)); |
| 68 | |
| 69 | /* This arranges for gas/write.c to not apply a relocation if |
| 70 | obj_fix_adjustable() says it is not adjustable. */ |
| 71 | #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP) |
| 72 | #endif |
| 73 | |
| 74 | #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section (FIXP, SEC) |
| 75 | extern long md_pcrel_from_section PARAMS ((struct fix *, segT)); |
| 76 | |
| 77 | #define IGNORE_NONSTANDARD_ESCAPES |
| 78 | |
| 79 | #define LISTING_HEADER \ |
| 80 | (!target_big_endian \ |
| 81 | ? "Hitachi Super-H GAS Little Endian" : "Hitachi Super-H GAS Big Endian") |
| 82 | |
| 83 | #define md_operand(x) |
| 84 | |
| 85 | extern const struct relax_type md_relax_table[]; |
| 86 | #define TC_GENERIC_RELAX_TABLE md_relax_table |
| 87 | |
| 88 | /* We record, for each section, whether we have most recently output a |
| 89 | CODE reloc or a DATA reloc. */ |
| 90 | struct sh_segment_info_type |
| 91 | { |
| 92 | int in_code : 1; |
| 93 | }; |
| 94 | #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type |
| 95 | |
| 96 | /* We call a routine to emit a reloc for a label, so that the linker |
| 97 | can align loads and stores without crossing a label. */ |
| 98 | extern void sh_frob_label PARAMS ((void)); |
| 99 | #define tc_frob_label(sym) sh_frob_label () |
| 100 | |
| 101 | /* We call a routine to flush pending output in order to output a DATA |
| 102 | reloc when required. */ |
| 103 | extern void sh_flush_pending_output PARAMS ((void)); |
| 104 | #define md_flush_pending_output() sh_flush_pending_output () |
| 105 | |
| 106 | #ifdef BFD_ASSEMBLER |
| 107 | #define tc_frob_file_before_adjust sh_frob_file |
| 108 | #else |
| 109 | #define tc_frob_file sh_frob_file |
| 110 | #endif |
| 111 | extern void sh_frob_file PARAMS ((void)); |
| 112 | |
| 113 | #ifdef OBJ_COFF |
| 114 | /* COFF specific definitions. */ |
| 115 | |
| 116 | #define DO_NOT_STRIP 0 |
| 117 | |
| 118 | /* This macro translates between an internal fix and an coff reloc type */ |
| 119 | #define TC_COFF_FIX2RTYPE(fix) ((fix)->fx_r_type) |
| 120 | |
| 121 | #define BFD_ARCH TARGET_ARCH |
| 122 | |
| 123 | #define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG) |
| 124 | |
| 125 | /* We need to write out relocs which have not been completed. */ |
| 126 | #define TC_COUNT_RELOC(fix) ((fix)->fx_addsy != NULL) |
| 127 | |
| 128 | #define TC_RELOC_MANGLE(seg, fix, int, paddr) \ |
| 129 | sh_coff_reloc_mangle ((seg), (fix), (int), (paddr)) |
| 130 | extern void sh_coff_reloc_mangle |
| 131 | PARAMS ((struct segment_info_struct *, struct fix *, |
| 132 | struct internal_reloc *, unsigned int)); |
| 133 | |
| 134 | #define tc_coff_symbol_emit_hook(a) ; /* not used */ |
| 135 | |
| 136 | #define NEED_FX_R_TYPE 1 |
| 137 | |
| 138 | #define TC_KEEP_FX_OFFSET 1 |
| 139 | |
| 140 | #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag) |
| 141 | extern int tc_coff_sizemachdep PARAMS ((fragS *)); |
| 142 | |
| 143 | #ifdef BFD_ASSEMBLER |
| 144 | #define SEG_NAME(SEG) segment_name (SEG) |
| 145 | #else |
| 146 | #define SEG_NAME(SEG) obj_segment_name (SEG) |
| 147 | #endif |
| 148 | |
| 149 | /* We align most sections to a 16 byte boundary. */ |
| 150 | #define SUB_SEGMENT_ALIGN(SEG) \ |
| 151 | (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \ |
| 152 | ? 0 \ |
| 153 | : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \ |
| 154 | || strcmp (SEG_NAME (SEG), ".ctors") == 0 \ |
| 155 | || strcmp (SEG_NAME (SEG), ".dtors") == 0) \ |
| 156 | ? 2 \ |
| 157 | : (sh_small ? 2 : 4))) |
| 158 | |
| 159 | #endif /* OBJ_COFF */ |
| 160 | |
| 161 | #ifdef OBJ_ELF |
| 162 | /* ELF specific definitions. */ |
| 163 | |
| 164 | /* Whether or not the target is big endian */ |
| 165 | extern int target_big_endian; |
| 166 | |
| 167 | #ifdef TE_LINUX |
| 168 | #define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux") |
| 169 | #else |
| 170 | #define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh") |
| 171 | #endif |
| 172 | |
| 173 | #define elf_tc_final_processing sh_elf_final_processing |
| 174 | extern void sh_elf_final_processing PARAMS ((void)); |
| 175 | |
| 176 | #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ |
| 177 | |
| 178 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" |
| 179 | |
| 180 | /* This is the relocation type for direct references to |
| 181 | GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such |
| 182 | as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed |
| 183 | normally with the regular expressions. The fixup specified here |
| 184 | when used at runtime implies that we should add the address of the |
| 185 | GOT to the specified location, and as a result we have simplified |
| 186 | the expression into something we can use. */ |
| 187 | #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC |
| 188 | |
| 189 | /* This expression evaluates to false if the relocation is for a local object |
| 190 | for which we still want to do the relocation at runtime. True if we |
| 191 | are willing to perform this relocation while building the .o file. |
| 192 | This is only used for pcrel relocations, so GOTOFF does not need to be |
| 193 | checked here. I am not sure if some of the others are ever used with |
| 194 | pcrel, but it is easier to be safe than sorry. |
| 195 | |
| 196 | We can't resolve references to the GOT or the PLT when creating the |
| 197 | object file, since these tables are only created by the linker. |
| 198 | Also, if the symbol is global, weak, common or not defined, the |
| 199 | assembler can't compute the appropriate reloc, since its location |
| 200 | can only be determined at link time. */ |
| 201 | |
| 202 | #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ |
| 203 | ((FIX)->fx_r_type != BFD_RELOC_32_PLT_PCREL \ |
| 204 | && (FIX)->fx_r_type != BFD_RELOC_32_GOT_PCREL \ |
| 205 | && (FIX)->fx_r_type != BFD_RELOC_SH_GOTPC \ |
| 206 | && ((FIX)->fx_addsy == NULL \ |
| 207 | || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ |
| 208 | && ! S_IS_WEAK ((FIX)->fx_addsy) \ |
| 209 | && S_IS_DEFINED ((FIX)->fx_addsy) \ |
| 210 | && ! S_IS_COMMON ((FIX)->fx_addsy)))) |
| 211 | |
| 212 | #endif /* OBJ_ELF */ |