gas/config/tc-msp430.h

   1 /* This file is tc-msp430.h
   2    Copyright (C) 2002-2017 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   (GENERIC_FORCE_RELOCATION_LOCAL (FIX)         \
 121    || msp430_force_relocation_local (FIX))
 122 extern int msp430_force_relocation_local (struct fix *);
 123
 124 /* We need to add reference symbols for .data/.bss.  */
 125 #define tc_frob_section(sec) msp430_frob_section (sec)
 126 extern void msp430_frob_section (asection *);
 127
 128 extern int msp430_enable_relax;
 129 extern int msp430_enable_polys;
 130
 131 #define tc_fix_adjustable(FIX) msp430_fix_adjustable (FIX)
 132 extern bfd_boolean             msp430_fix_adjustable (struct fix *);
 133
 134 /* Allow hexadecimal numbers with 'h' suffix.  Note that if the number
 135    starts with a letter it will be interpreted as a symbol name not a
 136    constant.  Thus "beach" is a symbol not the hex value 0xbeac.  So
 137    is A5A5h...  */
 138 #define NUMBERS_WITH_SUFFIX 1
 139
 140 #define md_end msp430_md_end
 141 extern void    msp430_md_end (void);
 142
 143 /* Do not allow call frame debug info optimization as otherwise we could
 144    generate the DWARF directives without the relocs necessary to patch
 145    them up.  */
 146 #define md_allow_eh_opt 0
 147
 148 /* The difference between same-section symbols may be affected by linker
 149    relaxation, so do not resolve such expressions in the assembler.  */
 150 #define md_allow_local_subtract(l,r,s) msp430_allow_local_subtract (l, r, s)
 151 extern bfd_boolean msp430_allow_local_subtract (expressionS *, expressionS *, segT);
 152
 153 #define RELOC_EXPANSION_POSSIBLE
 154 #define MAX_RELOC_EXPANSION 2
 155
 156 #define DIFF_EXPR_OK
 157
 158 /* Do not adjust relocations involving symbols in code sections,
 159    because it breaks linker relaxations.  This could be fixed in the
 160    linker, but this fix is simpler, and it pretty much only affects
 161    object size a little bit.  */
 162 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC)  \
 163   (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC) \
 164    || ((SEC)->flags & SEC_CODE) != 0            \
 165    || ((SEC)->flags & SEC_DEBUGGING) != 0       \
 166    || TC_FORCE_RELOCATION (FIX))
 167
 168 /* We validate subtract arguments within tc_gen_reloc(),
 169    so don't report errors at this point.  */
 170 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
 171
 172 #define DWARF2_USE_FIXED_ADVANCE_PC 1
 173
 174 #define TC_LINKRELAX_FIXUP(seg) ((seg->flags & SEC_CODE) || (seg->flags & SEC_DEBUGGING))
 175
 176 #define DWARF2_ADDR_SIZE(bfd) 4