gas/config/tc-avr.h

   1 /* This file is tc-avr.h
   2    Copyright 1999, 2000 Free Software Foundation, Inc.
   3
   4    Contributed by Denis Chertykov <denisc@overta.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 2, 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, 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, USA.  */
  22
  23 #ifndef BFD_ASSEMBLER
  24  #error AVR support requires BFD_ASSEMBLER
  25 #endif
  26
  27 #define TC_AVR
  28 /*   By convention, you should define this macro in the `.h' file.  For
  29      example, `tc-m68k.h' defines `TC_M68K'.  You might have to use this
  30      if it is necessary to add CPU specific code to the object format
  31      file.  */
  32
  33 #define TARGET_FORMAT "elf32-avr"
  34 /*   This macro is the BFD target name to use when creating the output
  35      file.  This will normally depend upon the `OBJ_FMT' macro.  */
  36
  37 #define TARGET_ARCH bfd_arch_avr
  38 /*   This macro is the BFD architecture to pass to `bfd_set_arch_mach'.  */
  39
  40 #define TARGET_MACH 0
  41 /*   This macro is the BFD machine number to pass to
  42      `bfd_set_arch_mach'.  If it is not defined, GAS will use 0.  */
  43
  44 #define TARGET_BYTES_BIG_ENDIAN 0
  45 /*   You should define this macro to be non-zero if the target is big
  46      endian, and zero if the target is little endian.  */
  47
  48 #define ONLY_STANDARD_ESCAPES
  49 /*   If you define this macro, GAS will warn about the use of
  50      nonstandard escape sequences in a string.  */
  51
  52 #define md_operand(x)
  53 /*   GAS will call this function for any expression that can not be
  54      recognized.  When the function is called, `input_line_pointer'
  55      will point to the start of the expression.  */
  56
  57 void avr_parse_cons_expression (expressionS *exp, int nbytes);
  58
  59 #define TC_PARSE_CONS_EXPRESSION(EXPR,N) avr_parse_cons_expression (EXPR,N)
  60 /*
  61      You may define this macro to parse an expression used in a data
  62      allocation pseudo-op such as `.word'.  You can use this to
  63      recognize relocation directives that may appear in such directives.*/
  64
  65 void avr_cons_fix_new(fragS *frag,int where, int nbytes, expressionS *exp);
  66
  67 #define TC_CONS_FIX_NEW(FRAG,WHERE,N,EXP) avr_cons_fix_new(FRAG,WHERE,N,EXP)
  68 /*   You may define this macro to generate a fixup for a data
  69      allocation pseudo-op.  */
  70
  71 #define md_number_to_chars number_to_chars_littleendian
  72 /*   This should just call either `number_to_chars_bigendian' or
  73      `number_to_chars_littleendian', whichever is appropriate.  On
  74      targets like the MIPS which support options to change the
  75      endianness, which function to call is a runtime decision.  On
  76      other targets, `md_number_to_chars' can be a simple macro.  */
  77
  78 #define WORKING_DOT_WORD
  79 /*
  80 `md_short_jump_size'
  81 `md_long_jump_size'
  82 `md_create_short_jump'
  83 `md_create_long_jump'
  84      If `WORKING_DOT_WORD' is defined, GAS will not do broken word
  85      processing (*note Broken words::.).  Otherwise, you should set
  86      `md_short_jump_size' to the size of a short jump (a jump that is
  87      just long enough to jump around a long jmp) and
  88      `md_long_jump_size' to the size of a long jump (a jump that can go
  89      anywhere in the function), You should define
  90      `md_create_short_jump' to create a short jump around a long jump,
  91      and define `md_create_long_jump' to create a long jump.  */
  92
  93 #define MD_APPLY_FIX3
  94
  95 #define TC_HANDLES_FX_DONE
  96
  97 #undef RELOC_EXPANSION_POSSIBLE
  98 /*   If you define this macro, it means that `tc_gen_reloc' may return
  99      multiple relocation entries for a single fixup.  In this case, the
 100      return value of `tc_gen_reloc' is a pointer to a null terminated
 101      array.  */
 102
 103 #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
 104 /*   If you define this macro, it should return the offset between the
 105      address of a PC relative fixup and the position from which the PC
 106      relative adjustment should be made.  On many processors, the base
 107      of a PC relative instruction is the next instruction, so this
 108      macro would return the length of an instruction.  */
 109
 110 extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
 111
 112 #define LISTING_WORD_SIZE 2
 113 /*   The number of bytes to put into a word in a listing.  This affects
 114      the way the bytes are clumped together in the listing.  For
 115      example, a value of 2 might print `1234 5678' where a value of 1
 116      would print `12 34 56 78'.  The default value is 4.  */
 117
 118 #define LEX_DOLLAR 0
 119 /* AVR port uses `$' as a logical line separator */
 120
 121 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0
 122 /*   An `.lcomm' directive with no explicit alignment parameter will
 123      use this macro to set P2VAR to the alignment that a request for
 124      SIZE bytes will have.  The alignment is expressed as a power of
 125      two.  If no alignment should take place, the macro definition
 126      should do nothing.  Some targets define a `.bss' directive that is
 127      also affected by this macro.  The default definition will set
 128      P2VAR to the truncated power of two of sizes up to eight bytes.  */