gas/config/tc-avr.h

   1 /* This file is tc-avr.h
   2    Copyright 1999, 2000, 2001, 2002, 2005 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, 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 /* By convention, you should define this macro in the `.h' file.  For
  24    example, `tc-m68k.h' defines `TC_M68K'.  You might have to use this
  25    if it is necessary to add CPU specific code to the object format
  26    file.  */
  27 #define TC_AVR
  28
  29 /* This macro is the BFD target name to use when creating the output
  30    file.  This will normally depend upon the `OBJ_FMT' macro.  */
  31 #define TARGET_FORMAT "elf32-avr"
  32
  33 /* This macro is the BFD architecture to pass to `bfd_set_arch_mach'.  */
  34 #define TARGET_ARCH bfd_arch_avr
  35
  36 /* This macro is the BFD machine number to pass to
  37    `bfd_set_arch_mach'.  If it is not defined, GAS will use 0.  */
  38 #define TARGET_MACH 0
  39
  40 /* You should define this macro to be non-zero if the target is big
  41    endian, and zero if the target is little endian.  */
  42 #define TARGET_BYTES_BIG_ENDIAN 0
  43
  44 /* If you define this macro, GAS will warn about the use of
  45    nonstandard escape sequences in a string.  */
  46 #define ONLY_STANDARD_ESCAPES
  47
  48 /* GAS will call this function for any expression that can not be
  49    recognized.  When the function is called, `input_line_pointer'
  50    will point to the start of the expression.  */
  51 #define md_operand(x)
  52
  53 /* You may define this macro to parse an expression used in a data
  54    allocation pseudo-op such as `.word'.  You can use this to
  55    recognize relocation directives that may appear in such directives.  */
  56 #define TC_PARSE_CONS_EXPRESSION(EXPR,N) avr_parse_cons_expression (EXPR, N)
  57 extern void avr_parse_cons_expression (expressionS *, int);
  58
  59 /* You may define this macro to generate a fixup for a data
  60    allocation pseudo-op.  */
  61 #define TC_CONS_FIX_NEW(FRAG,WHERE,N,EXP) avr_cons_fix_new (FRAG, WHERE, N, EXP)
  62 extern void avr_cons_fix_new (fragS *,int, int, expressionS *);
  63
  64 /* This should just call either `number_to_chars_bigendian' or
  65    `number_to_chars_littleendian', whichever is appropriate.  On
  66    targets like the MIPS which support options to change the
  67    endianness, which function to call is a runtime decision.  On
  68    other targets, `md_number_to_chars' can be a simple macro.  */
  69 #define md_number_to_chars number_to_chars_littleendian
  70
  71 /* `md_short_jump_size'
  72    `md_long_jump_size'
  73    `md_create_short_jump'
  74    `md_create_long_jump'
  75    If `WORKING_DOT_WORD' is defined, GAS will not do broken word
  76    processing (*note Broken words::.).  Otherwise, you should set
  77    `md_short_jump_size' to the size of a short jump (a jump that is
  78    just long enough to jump around a long jmp) and
  79    `md_long_jump_size' to the size of a long jump (a jump that can go
  80    anywhere in the function), You should define
  81    `md_create_short_jump' to create a short jump around a long jump,
  82    and define `md_create_long_jump' to create a long jump.  */
  83 #define WORKING_DOT_WORD
  84
  85 /* If you define this macro, it means that `tc_gen_reloc' may return
  86    multiple relocation entries for a single fixup.  In this case, the
  87    return value of `tc_gen_reloc' is a pointer to a null terminated
  88    array.  */
  89 #undef RELOC_EXPANSION_POSSIBLE
  90
  91 /* No shared lib support, so we don't need to ensure externally
  92    visible symbols can be overridden.  */
  93 #define EXTERN_FORCE_RELOC 0
  94
  95 /* Values passed to md_apply_fix don't include the symbol value.  */
  96 #define MD_APPLY_SYM_VALUE(FIX) 0
  97
  98 /* If you define this macro, it should return the offset between the
  99    address of a PC relative fixup and the position from which the PC
 100    relative adjustment should be made.  On many processors, the base
 101    of a PC relative instruction is the next instruction, so this
 102    macro would return the length of an instruction.  */
 103 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
 104 extern long md_pcrel_from_section (struct fix *, segT);
 105
 106 /* The number of bytes to put into a word in a listing.  This affects
 107    the way the bytes are clumped together in the listing.  For
 108    example, a value of 2 might print `1234 5678' where a value of 1
 109    would print `12 34 56 78'.  The default value is 4.  */
 110 #define LISTING_WORD_SIZE 2
 111
 112 /* AVR port uses `$' as a logical line separator */
 113 #define LEX_DOLLAR 0
 114
 115 /* An `.lcomm' directive with no explicit alignment parameter will
 116    use this macro to set P2VAR to the alignment that a request for
 117    SIZE bytes will have.  The alignment is expressed as a power of
 118    two.  If no alignment should take place, the macro definition
 119    should do nothing.  Some targets define a `.bss' directive that is
 120    also affected by this macro.  The default definition will set
 121    P2VAR to the truncated power of two of sizes up to eight bytes.  */
 122 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0