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/* This file is tc-avr.h
Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Contributed by Denis Chertykov <denisc@overta.ru>
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#ifndef BFD_ASSEMBLER
#error AVR support requires BFD_ASSEMBLER
#endif
/* By convention, you should define this macro in the `.h' file. For
example, `tc-m68k.h' defines `TC_M68K'. You might have to use this
if it is necessary to add CPU specific code to the object format
file. */
#define TC_AVR
/* This macro is the BFD target name to use when creating the output
file. This will normally depend upon the `OBJ_FMT' macro. */
#define TARGET_FORMAT "elf32-avr"
/* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
#define TARGET_ARCH bfd_arch_avr
/* This macro is the BFD machine number to pass to
`bfd_set_arch_mach'. If it is not defined, GAS will use 0. */
#define TARGET_MACH 0
/* You should define this macro to be non-zero if the target is big
endian, and zero if the target is little endian. */
#define TARGET_BYTES_BIG_ENDIAN 0
/* If you define this macro, GAS will warn about the use of
nonstandard escape sequences in a string. */
#define ONLY_STANDARD_ESCAPES
/* GAS will call this function for any expression that can not be
recognized. When the function is called, `input_line_pointer'
will point to the start of the expression. */
#define md_operand(x)
/* You may define this macro to parse an expression used in a data
allocation pseudo-op such as `.word'. You can use this to
recognize relocation directives that may appear in such directives. */
#define TC_PARSE_CONS_EXPRESSION(EXPR,N) avr_parse_cons_expression (EXPR,N)
void avr_parse_cons_expression (expressionS *exp, int nbytes);
/* You may define this macro to generate a fixup for a data
allocation pseudo-op. */
#define TC_CONS_FIX_NEW(FRAG,WHERE,N,EXP) avr_cons_fix_new(FRAG,WHERE,N,EXP)
void avr_cons_fix_new(fragS *frag,int where, int nbytes, expressionS *exp);
/* This should just call either `number_to_chars_bigendian' or
`number_to_chars_littleendian', whichever is appropriate. On
targets like the MIPS which support options to change the
endianness, which function to call is a runtime decision. On
other targets, `md_number_to_chars' can be a simple macro. */
#define md_number_to_chars number_to_chars_littleendian
/* `md_short_jump_size'
`md_long_jump_size'
`md_create_short_jump'
`md_create_long_jump'
If `WORKING_DOT_WORD' is defined, GAS will not do broken word
processing (*note Broken words::.). Otherwise, you should set
`md_short_jump_size' to the size of a short jump (a jump that is
just long enough to jump around a long jmp) and
`md_long_jump_size' to the size of a long jump (a jump that can go
anywhere in the function), You should define
`md_create_short_jump' to create a short jump around a long jump,
and define `md_create_long_jump' to create a long jump. */
#define WORKING_DOT_WORD
/* If you define this macro, it means that `tc_gen_reloc' may return
multiple relocation entries for a single fixup. In this case, the
return value of `tc_gen_reloc' is a pointer to a null terminated
array. */
#undef RELOC_EXPANSION_POSSIBLE
/* No shared lib support, so we don't need to ensure externally
visible symbols can be overridden. */
#define EXTERN_FORCE_RELOC 0
/* Values passed to md_apply_fix don't include the symbol value. */
#define MD_APPLY_SYM_VALUE(FIX) 0
/* If you define this macro, it should return the offset between the
address of a PC relative fixup and the position from which the PC
relative adjustment should be made. On many processors, the base
of a PC relative instruction is the next instruction, so this
macro would return the length of an instruction. */
#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
/* The number of bytes to put into a word in a listing. This affects
the way the bytes are clumped together in the listing. For
example, a value of 2 might print `1234 5678' where a value of 1
would print `12 34 56 78'. The default value is 4. */
#define LISTING_WORD_SIZE 2
/* AVR port uses `$' as a logical line separator */
#define LEX_DOLLAR 0
/* An `.lcomm' directive with no explicit alignment parameter will
use this macro to set P2VAR to the alignment that a request for
SIZE bytes will have. The alignment is expressed as a power of
two. If no alignment should take place, the macro definition
should do nothing. Some targets define a `.bss' directive that is
also affected by this macro. The default definition will set
P2VAR to the truncated power of two of sizes up to eight bytes. */
#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0
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