| 1 | /* This file is tc-msp430.h |
| 2 | Copyright (C) 2002-2016 Free Software Foundation, Inc. |
| 3 | |
| 4 | Contributed by Dmitry Diky <diwil@mail.ru> |
| 5 | |
| 6 | This file is part of GAS, the GNU Assembler. |
| 7 | |
| 8 | GAS is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | GAS is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GAS; see the file COPYING. If not, write to the Free |
| 20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 21 | 02110-1301, USA. */ |
| 22 | |
| 23 | #define TC_MSP430 |
| 24 | /* By convention, you should define this macro in the `.h' file. For |
| 25 | example, `tc-m68k.h' defines `TC_M68K'. You might have to use this |
| 26 | if it is necessary to add CPU specific code to the object format |
| 27 | file. */ |
| 28 | |
| 29 | #define TARGET_FORMAT "elf32-msp430" |
| 30 | /* This macro is the BFD target name to use when creating the output |
| 31 | file. This will normally depend upon the `OBJ_FMT' macro. */ |
| 32 | |
| 33 | #define TARGET_ARCH bfd_arch_msp430 |
| 34 | /* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */ |
| 35 | |
| 36 | #define TARGET_MACH 0 |
| 37 | /* This macro is the BFD machine number to pass to |
| 38 | `bfd_set_arch_mach'. If it is not defined, GAS will use 0. */ |
| 39 | |
| 40 | #define TARGET_BYTES_BIG_ENDIAN 0 |
| 41 | /* You should define this macro to be non-zero if the target is big |
| 42 | endian, and zero if the target is little endian. */ |
| 43 | |
| 44 | #define ONLY_STANDARD_ESCAPES |
| 45 | /* If you define this macro, GAS will warn about the use of |
| 46 | nonstandard escape sequences in a string. */ |
| 47 | |
| 48 | #define md_operand(x) |
| 49 | /* GAS will call this function for any expression that can not be |
| 50 | recognized. When the function is called, `input_line_pointer' |
| 51 | will point to the start of the expression. */ |
| 52 | |
| 53 | #define md_number_to_chars number_to_chars_littleendian |
| 54 | /* This should just call either `number_to_chars_bigendian' or |
| 55 | `number_to_chars_littleendian', whichever is appropriate. On |
| 56 | targets like the MIPS which support options to change the |
| 57 | endianness, which function to call is a runtime decision. On |
| 58 | other targets, `md_number_to_chars' can be a simple macro. */ |
| 59 | |
| 60 | #define WORKING_DOT_WORD |
| 61 | /* |
| 62 | `md_short_jump_size' |
| 63 | `md_long_jump_size' |
| 64 | `md_create_short_jump' |
| 65 | `md_create_long_jump' |
| 66 | If `WORKING_DOT_WORD' is defined, GAS will not do broken word |
| 67 | processing (*note Broken words::.). Otherwise, you should set |
| 68 | `md_short_jump_size' to the size of a short jump (a jump that is |
| 69 | just long enough to jump around a long jmp) and |
| 70 | `md_long_jump_size' to the size of a long jump (a jump that can go |
| 71 | anywhere in the function), You should define |
| 72 | `md_create_short_jump' to create a short jump around a long jump, |
| 73 | and define `md_create_long_jump' to create a long jump. */ |
| 74 | |
| 75 | #define MD_APPLY_FIX3 |
| 76 | /* Values passed to md_apply_fix don't include symbol values. */ |
| 77 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
| 78 | |
| 79 | #define TC_HANDLES_FX_DONE |
| 80 | |
| 81 | #undef RELOC_EXPANSION_POSSIBLE |
| 82 | /* If you define this macro, it means that `tc_gen_reloc' may return |
| 83 | multiple relocation entries for a single fixup. In this case, the |
| 84 | return value of `tc_gen_reloc' is a pointer to a null terminated |
| 85 | array. */ |
| 86 | |
| 87 | #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC) |
| 88 | /* If you define this macro, it should return the offset between the |
| 89 | address of a PC relative fixup and the position from which the PC |
| 90 | relative adjustment should be made. On many processors, the base |
| 91 | of a PC relative instruction is the next instruction, so this |
| 92 | macro would return the length of an instruction. */ |
| 93 | |
| 94 | extern long md_pcrel_from_section (struct fix *, segT); |
| 95 | |
| 96 | #define LISTING_WORD_SIZE 2 |
| 97 | /* The number of bytes to put into a word in a listing. This affects |
| 98 | the way the bytes are clumped together in the listing. For |
| 99 | example, a value of 2 might print `1234 5678' where a value of 1 |
| 100 | would print `12 34 56 78'. The default value is 4. */ |
| 101 | |
| 102 | /* Support symbols like: C$$IO$$. */ |
| 103 | #undef LEX_DOLLAR |
| 104 | #define LEX_DOLLAR 1 |
| 105 | |
| 106 | #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0 |
| 107 | /* An `.lcomm' directive with no explicit alignment parameter will |
| 108 | use this macro to set P2VAR to the alignment that a request for |
| 109 | SIZE bytes will have. The alignment is expressed as a power of |
| 110 | two. If no alignment should take place, the macro definition |
| 111 | should do nothing. Some targets define a `.bss' directive that is |
| 112 | also affected by this macro. The default definition will set |
| 113 | P2VAR to the truncated power of two of sizes up to eight bytes. */ |
| 114 | |
| 115 | #define md_relax_frag(SEG, FRAGP, STRETCH) \ |
| 116 | msp430_relax_frag (SEG, FRAGP, STRETCH) |
| 117 | extern long msp430_relax_frag (segT, fragS *, long); |
| 118 | |
| 119 | #define TC_FORCE_RELOCATION_LOCAL(FIX) \ |
| 120 | msp430_force_relocation_local (FIX) |
| 121 | extern int msp430_force_relocation_local (struct fix *); |
| 122 | |
| 123 | /* We need to add reference symbols for .data/.bss. */ |
| 124 | #define tc_frob_section(sec) msp430_frob_section (sec) |
| 125 | extern void msp430_frob_section (asection *); |
| 126 | |
| 127 | extern int msp430_enable_relax; |
| 128 | extern int msp430_enable_polys; |
| 129 | |
| 130 | #define tc_fix_adjustable(FIX) msp430_fix_adjustable (FIX) |
| 131 | extern bfd_boolean msp430_fix_adjustable (struct fix *); |
| 132 | |
| 133 | /* Allow hexadeciaml numbers with 'h' suffix. Note that if the number |
| 134 | starts with a letter it will be interpreted as a symbol name not a |
| 135 | constant. Thus "beach" is a symbol not the hex value 0xbeac. So |
| 136 | is A5A5h... */ |
| 137 | #define NUMBERS_WITH_SUFFIX 1 |
| 138 | |
| 139 | #define md_end msp430_md_end |
| 140 | extern void msp430_md_end (void); |
| 141 | |
| 142 | /* Do not allow call frame debug info optimization as otherwise we could |
| 143 | generate the DWARF directives without the relocs necessary to patch |
| 144 | them up. */ |
| 145 | #define md_allow_eh_opt 0 |
| 146 | |
| 147 | /* The difference between same-section symbols may be affected by linker |
| 148 | relaxation, so do not resolve such expressions in the assembler. */ |
| 149 | #define md_allow_local_subtract(l,r,s) msp430_allow_local_subtract (l, r, s) |
| 150 | extern bfd_boolean msp430_allow_local_subtract (expressionS *, expressionS *, segT); |
| 151 | |
| 152 | #define RELOC_EXPANSION_POSSIBLE |
| 153 | #define MAX_RELOC_EXPANSION 2 |
| 154 | |
| 155 | #define DIFF_EXPR_OK |
| 156 | |
| 157 | /* Do not adjust relocations involving symbols in code sections, |
| 158 | because it breaks linker relaxations. This could be fixed in the |
| 159 | linker, but this fix is simpler, and it pretty much only affects |
| 160 | object size a little bit. */ |
| 161 | #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ |
| 162 | ( ((SEC)->flags & SEC_CODE) != 0 \ |
| 163 | || ((SEC)->flags & SEC_DEBUGGING) != 0 \ |
| 164 | || ! SEG_NORMAL (SEC) \ |
| 165 | || TC_FORCE_RELOCATION (FIX)) |
| 166 | |
| 167 | /* We validate subtract arguments within tc_gen_reloc(), |
| 168 | so don't report errors at this point. */ |
| 169 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1 |
| 170 | |
| 171 | #define DWARF2_USE_FIXED_ADVANCE_PC 1 |
| 172 | |
| 173 | #define TC_LINKRELAX_FIXUP(seg) ((seg->flags & SEC_CODE) || (seg->flags & SEC_DEBUGGING)) |
| 174 | |
| 175 | #define DWARF2_ADDR_SIZE(bfd) 4 |