1 /* This file is tc-avr.h
2 Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
4 Contributed by Denis Chertykov <denisc@overta.ru>
6 This file is part of GAS, the GNU Assembler.
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)
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.
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
24 #error AVR support requires BFD_ASSEMBLER
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
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. */
37 #define TARGET_ARCH bfd_arch_avr
38 /* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
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. */
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. */
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. */
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. */
57 void avr_parse_cons_expression (expressionS *exp, int nbytes);
59 #define TC_PARSE_CONS_EXPRESSION(EXPR,N) avr_parse_cons_expression (EXPR,N)
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.*/
65 void avr_cons_fix_new(fragS *frag,int where, int nbytes, expressionS *exp);
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. */
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. */
78 #define WORKING_DOT_WORD
82 `md_create_short_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. */
93 #undef RELOC_EXPANSION_POSSIBLE
94 /* If you define this macro, it means that `tc_gen_reloc' may return
95 multiple relocation entries for a single fixup. In this case, the
96 return value of `tc_gen_reloc' is a pointer to a null terminated
99 #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
100 /* If you define this macro, it should return the offset between the
101 address of a PC relative fixup and the position from which the PC
102 relative adjustment should be made. On many processors, the base
103 of a PC relative instruction is the next instruction, so this
104 macro would return the length of an instruction. */
106 extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
108 #define LISTING_WORD_SIZE 2
109 /* The number of bytes to put into a word in a listing. This affects
110 the way the bytes are clumped together in the listing. For
111 example, a value of 2 might print `1234 5678' where a value of 1
112 would print `12 34 56 78'. The default value is 4. */
115 /* AVR port uses `$' as a logical line separator */
117 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0
118 /* An `.lcomm' directive with no explicit alignment parameter will
119 use this macro to set P2VAR to the alignment that a request for
120 SIZE bytes will have. The alignment is expressed as a power of
121 two. If no alignment should take place, the macro definition
122 should do nothing. Some targets define a `.bss' directive that is
123 also affected by this macro. The default definition will set
124 P2VAR to the truncated power of two of sizes up to eight bytes. */