| 1 | /* tc-mn10300.h -- Header file for tc-mn10300.c. |
| 2 | Copyright (C) 1996-2019 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 the Free |
| 18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 19 | 02110-1301, USA. */ |
| 20 | |
| 21 | #define TC_MN10300 |
| 22 | |
| 23 | #define TARGET_BYTES_BIG_ENDIAN 0 |
| 24 | |
| 25 | #define DIFF_EXPR_OK |
| 26 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" |
| 27 | |
| 28 | #define TC_FORCE_RELOCATION(FIX) mn10300_force_relocation (FIX) |
| 29 | extern bfd_boolean mn10300_force_relocation (struct fix *); |
| 30 | |
| 31 | /* tc-mn10300.c uses TC_FORCE_RELOCATION_LOCAL, a macro that should |
| 32 | only appear in write.c. The use is likely incorrect. Duplicating |
| 33 | the definition here rather than expanding it in |
| 34 | TC_FORCE_RELOCATION_LOCAL at least ensures write.c changes will be |
| 35 | flagged immediately with a compile error. */ |
| 36 | #define GENERIC_FORCE_RELOCATION_LOCAL(FIX) \ |
| 37 | (!(FIX)->fx_pcrel \ |
| 38 | || TC_FORCE_RELOCATION (FIX)) |
| 39 | |
| 40 | #define TC_FORCE_RELOCATION_LOCAL(FIX) \ |
| 41 | (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \ |
| 42 | || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ |
| 43 | || (FIX)->fx_r_type == BFD_RELOC_MN10300_GOT32 \ |
| 44 | || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL) |
| 45 | |
| 46 | #define md_parse_name(NAME, EXPRP, MODE, NEXTCHARP) \ |
| 47 | mn10300_parse_name ((NAME), (EXPRP), (MODE), (NEXTCHARP)) |
| 48 | int mn10300_parse_name (char const *, expressionS *, enum expr_mode, char *); |
| 49 | |
| 50 | #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \ |
| 51 | mn10300_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC)) |
| 52 | void mn10300_cons_fix_new (fragS *, int, int, expressionS *, |
| 53 | bfd_reloc_code_real_type); |
| 54 | |
| 55 | /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT |
| 56 | symbols. The relocation type is stored in X_md. */ |
| 57 | #define O_PIC_reloc O_md1 |
| 58 | |
| 59 | /* The target BFD architecture. */ |
| 60 | #define TARGET_ARCH bfd_arch_mn10300 |
| 61 | |
| 62 | #ifdef TE_LINUX |
| 63 | #define TARGET_FORMAT "elf32-am33lin" |
| 64 | #else |
| 65 | #define TARGET_FORMAT "elf32-mn10300" |
| 66 | #endif |
| 67 | |
| 68 | |
| 69 | /* Do not adjust relocations involving symbols in code sections, |
| 70 | because it breaks linker relaxations. This could be fixed in the |
| 71 | linker, but this fix is simpler, and it pretty much only affects |
| 72 | object size a little bit. */ |
| 73 | #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ |
| 74 | (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC) \ |
| 75 | || ((SEC)->flags & SEC_CODE) != 0 \ |
| 76 | || (FIX)->fx_r_type == BFD_RELOC_MN10300_ALIGN \ |
| 77 | || TC_FORCE_RELOCATION (FIX)) |
| 78 | |
| 79 | /* We validate subtract arguments within tc_gen_reloc(), so don't |
| 80 | report errors at this point. */ |
| 81 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1 |
| 82 | |
| 83 | /* Fixup debug sections since we will never relax them. Ideally, we |
| 84 | could do away with this and instead check every single fixup with |
| 85 | TC_FORCE_RELOCATION and TC_FORCE_RELOCATION_SUB_NAME, verifying |
| 86 | that the sections of the referenced symbols (and not the sections |
| 87 | in which the fixup appears) may be subject to relaxation. We'd |
| 88 | still have to check the section in which the fixup appears, because |
| 89 | we want to do some simplifications in debugging info that might |
| 90 | break in real code. |
| 91 | |
| 92 | Using the infrastructure in write.c to simplify subtraction fixups |
| 93 | would enable us to remove a lot of code from tc_gen_reloc(), but |
| 94 | this is simpler, faster, and produces almost the same effect. |
| 95 | Also, in the macros above, we can't check whether the fixup is in a |
| 96 | debugging section or not, so we have to use this for now. */ |
| 97 | #define TC_LINKRELAX_FIXUP(seg) (seg->flags & SEC_ALLOC) |
| 98 | |
| 99 | #define md_operand(x) |
| 100 | |
| 101 | /* Permit temporary numeric labels. */ |
| 102 | #define LOCAL_LABELS_FB 1 |
| 103 | |
| 104 | /* We don't need to handle .word strangely. */ |
| 105 | #define WORKING_DOT_WORD |
| 106 | |
| 107 | #define md_number_to_chars number_to_chars_littleendian |
| 108 | |
| 109 | #define tc_fix_adjustable(FIX) mn10300_fix_adjustable (FIX) |
| 110 | extern bfd_boolean mn10300_fix_adjustable (struct fix *); |
| 111 | |
| 112 | /* We do relaxing in the assembler as well as the linker. */ |
| 113 | extern const struct relax_type md_relax_table[]; |
| 114 | #define TC_GENERIC_RELAX_TABLE md_relax_table |
| 115 | |
| 116 | #define DWARF2_LINE_MIN_INSN_LENGTH 1 |
| 117 | |
| 118 | /* The difference between same-section symbols may be affected by linker |
| 119 | relaxation, so do not resolve such expressions in the assembler. */ |
| 120 | #define md_allow_local_subtract(l,r,s) mn10300_allow_local_subtract (l, r, s) |
| 121 | extern bfd_boolean mn10300_allow_local_subtract (expressionS *, expressionS *, segT); |
| 122 | |
| 123 | #define RELOC_EXPANSION_POSSIBLE |
| 124 | #define MAX_RELOC_EXPANSION 2 |
| 125 | |
| 126 | #define TC_FRAG_TYPE bfd_boolean |
| 127 | |
| 128 | #define HANDLE_ALIGN(frag) mn10300_handle_align (frag) |
| 129 | extern void mn10300_handle_align (fragS *); |
| 130 | |
| 131 | /* Only allow call frame debug info optimization when linker relaxation is |
| 132 | not enabled as otherwise we could generate the DWARF directives without |
| 133 | the relocs necessary to patch them up. */ |
| 134 | #define md_allow_eh_opt (linkrelax == 0) |