| /* This file is tc-avr.h |
| Copyright 1999, 2000, 2001, 2002, 2005, 2006, 2007 |
| 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 3, 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. */ |
| |
| /* 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) |
| extern void avr_parse_cons_expression (expressionS *, int); |
| |
| /* 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) |
| extern void avr_cons_fix_new (fragS *,int, int, expressionS *); |
| |
| /* 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 (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 |
| |
| /* We don't want gas to fixup the following program memory related relocations. |
| We will need them in case that we want to do linker relaxation. |
| We could in principle keep these fixups in gas when not relaxing. |
| However, there is no serious performance penilty when making the linker |
| make the fixup work. Check also that fx_addsy is not NULL, in order to make |
| sure that the fixup refers to some sort of lable. */ |
| #define TC_VALIDATE_FIX(FIXP,SEG,SKIP) \ |
| if ( (FIXP->fx_r_type == BFD_RELOC_AVR_7_PCREL \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_13_PCREL \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_LO8_LDI_PM \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_LO8_LDI_GS \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_HI8_LDI_PM \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_HI8_LDI_GS \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_HH8_LDI_PM \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_LO8_LDI_PM_NEG \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_HI8_LDI_PM_NEG \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_HH8_LDI_PM_NEG \ |
| || FIXP->fx_r_type == BFD_RELOC_AVR_16_PM) \ |
| && (FIXP->fx_addsy)) \ |
| { \ |
| goto SKIP; \ |
| } |
| |
| /* This target is buggy, and sets fix size too large. */ |
| #define TC_FX_SIZE_SLACK(FIX) 2 |
