/* This file is tc-avr.h
|
/* This file is tc-avr.h
|
Copyright 1999, 2000, 2001, 2002, 2005, 2006, 2007
|
Copyright 1999, 2000, 2001, 2002, 2005, 2006, 2007
|
Free Software Foundation, Inc.
|
Free Software Foundation, Inc.
|
|
|
Contributed by Denis Chertykov <denisc@overta.ru>
|
Contributed by Denis Chertykov <denisc@overta.ru>
|
|
|
This file is part of GAS, the GNU Assembler.
|
This file is part of GAS, the GNU Assembler.
|
|
|
GAS is free software; you can redistribute it and/or modify
|
GAS is free software; you can redistribute it and/or modify
|
it under the terms of the GNU General Public License as published by
|
it under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 3, or (at your option)
|
the Free Software Foundation; either version 3, or (at your option)
|
any later version.
|
any later version.
|
|
|
GAS is distributed in the hope that it will be useful,
|
GAS is distributed in the hope that it will be useful,
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
GNU General Public License for more details.
|
GNU General Public License for more details.
|
|
|
You should have received a copy of the GNU General Public License
|
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
|
along with GAS; see the file COPYING. If not, write to the Free
|
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
|
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
|
02110-1301, USA. */
|
02110-1301, USA. */
|
|
|
/* By convention, you should define this macro in the `.h' file. For
|
/* 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
|
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
|
if it is necessary to add CPU specific code to the object format
|
file. */
|
file. */
|
#define TC_AVR
|
#define TC_AVR
|
|
|
/* This macro is the BFD target name to use when creating the output
|
/* This macro is the BFD target name to use when creating the output
|
file. This will normally depend upon the `OBJ_FMT' macro. */
|
file. This will normally depend upon the `OBJ_FMT' macro. */
|
#define TARGET_FORMAT "elf32-avr"
|
#define TARGET_FORMAT "elf32-avr"
|
|
|
/* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
|
/* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
|
#define TARGET_ARCH bfd_arch_avr
|
#define TARGET_ARCH bfd_arch_avr
|
|
|
/* This macro is the BFD machine number to pass to
|
/* This macro is the BFD machine number to pass to
|
`bfd_set_arch_mach'. If it is not defined, GAS will use 0. */
|
`bfd_set_arch_mach'. If it is not defined, GAS will use 0. */
|
#define TARGET_MACH 0
|
#define TARGET_MACH 0
|
|
|
/* You should define this macro to be non-zero if the target is big
|
/* You should define this macro to be non-zero if the target is big
|
endian, and zero if the target is little endian. */
|
endian, and zero if the target is little endian. */
|
#define TARGET_BYTES_BIG_ENDIAN 0
|
#define TARGET_BYTES_BIG_ENDIAN 0
|
|
|
/* If you define this macro, GAS will warn about the use of
|
/* If you define this macro, GAS will warn about the use of
|
nonstandard escape sequences in a string. */
|
nonstandard escape sequences in a string. */
|
#define ONLY_STANDARD_ESCAPES
|
#define ONLY_STANDARD_ESCAPES
|
|
|
/* GAS will call this function for any expression that can not be
|
/* GAS will call this function for any expression that can not be
|
recognized. When the function is called, `input_line_pointer'
|
recognized. When the function is called, `input_line_pointer'
|
will point to the start of the expression. */
|
will point to the start of the expression. */
|
#define md_operand(x)
|
#define md_operand(x)
|
|
|
/* You may define this macro to parse an expression used in a data
|
/* You may define this macro to parse an expression used in a data
|
allocation pseudo-op such as `.word'. You can use this to
|
allocation pseudo-op such as `.word'. You can use this to
|
recognize relocation directives that may appear in such directives. */
|
recognize relocation directives that may appear in such directives. */
|
#define TC_PARSE_CONS_EXPRESSION(EXPR,N) avr_parse_cons_expression (EXPR, N)
|
#define TC_PARSE_CONS_EXPRESSION(EXPR,N) avr_parse_cons_expression (EXPR, N)
|
extern void avr_parse_cons_expression (expressionS *, int);
|
extern void avr_parse_cons_expression (expressionS *, int);
|
|
|
/* You may define this macro to generate a fixup for a data
|
/* You may define this macro to generate a fixup for a data
|
allocation pseudo-op. */
|
allocation pseudo-op. */
|
#define TC_CONS_FIX_NEW(FRAG,WHERE,N,EXP) avr_cons_fix_new (FRAG, WHERE, N, EXP)
|
#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 *);
|
extern void avr_cons_fix_new (fragS *,int, int, expressionS *);
|
|
|
/* This should just call either `number_to_chars_bigendian' or
|
/* This should just call either `number_to_chars_bigendian' or
|
`number_to_chars_littleendian', whichever is appropriate. On
|
`number_to_chars_littleendian', whichever is appropriate. On
|
targets like the MIPS which support options to change the
|
targets like the MIPS which support options to change the
|
endianness, which function to call is a runtime decision. On
|
endianness, which function to call is a runtime decision. On
|
other targets, `md_number_to_chars' can be a simple macro. */
|
other targets, `md_number_to_chars' can be a simple macro. */
|
#define md_number_to_chars number_to_chars_littleendian
|
#define md_number_to_chars number_to_chars_littleendian
|
|
|
/* `md_short_jump_size'
|
/* `md_short_jump_size'
|
`md_long_jump_size'
|
`md_long_jump_size'
|
`md_create_short_jump'
|
`md_create_short_jump'
|
`md_create_long_jump'
|
`md_create_long_jump'
|
If `WORKING_DOT_WORD' is defined, GAS will not do broken word
|
If `WORKING_DOT_WORD' is defined, GAS will not do broken word
|
processing (*note Broken words::.). Otherwise, you should set
|
processing (*note Broken words::.). Otherwise, you should set
|
`md_short_jump_size' to the size of a short jump (a jump that is
|
`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
|
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
|
`md_long_jump_size' to the size of a long jump (a jump that can go
|
anywhere in the function), You should define
|
anywhere in the function), You should define
|
`md_create_short_jump' to create a short jump around a long jump,
|
`md_create_short_jump' to create a short jump around a long jump,
|
and define `md_create_long_jump' to create a long jump. */
|
and define `md_create_long_jump' to create a long jump. */
|
#define WORKING_DOT_WORD
|
#define WORKING_DOT_WORD
|
|
|
/* If you define this macro, it means that `tc_gen_reloc' may return
|
/* If you define this macro, it means that `tc_gen_reloc' may return
|
multiple relocation entries for a single fixup. In this case, the
|
multiple relocation entries for a single fixup. In this case, the
|
return value of `tc_gen_reloc' is a pointer to a null terminated
|
return value of `tc_gen_reloc' is a pointer to a null terminated
|
array. */
|
array. */
|
#undef RELOC_EXPANSION_POSSIBLE
|
#undef RELOC_EXPANSION_POSSIBLE
|
|
|
/* No shared lib support, so we don't need to ensure externally
|
/* No shared lib support, so we don't need to ensure externally
|
visible symbols can be overridden. */
|
visible symbols can be overridden. */
|
#define EXTERN_FORCE_RELOC 0
|
#define EXTERN_FORCE_RELOC 0
|
|
|
/* Values passed to md_apply_fix don't include the symbol value. */
|
/* Values passed to md_apply_fix don't include the symbol value. */
|
#define MD_APPLY_SYM_VALUE(FIX) 0
|
#define MD_APPLY_SYM_VALUE(FIX) 0
|
|
|
/* If you define this macro, it should return the offset between the
|
/* 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
|
address of a PC relative fixup and the position from which the PC
|
relative adjustment should be made. On many processors, the base
|
relative adjustment should be made. On many processors, the base
|
of a PC relative instruction is the next instruction, so this
|
of a PC relative instruction is the next instruction, so this
|
macro would return the length of an instruction. */
|
macro would return the length of an instruction. */
|
#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
|
#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
|
extern long md_pcrel_from_section (struct fix *, segT);
|
extern long md_pcrel_from_section (struct fix *, segT);
|
|
|
/* The number of bytes to put into a word in a listing. This affects
|
/* 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
|
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
|
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. */
|
would print `12 34 56 78'. The default value is 4. */
|
#define LISTING_WORD_SIZE 2
|
#define LISTING_WORD_SIZE 2
|
|
|
/* AVR port uses `$' as a logical line separator. */
|
/* AVR port uses `$' as a logical line separator. */
|
#define LEX_DOLLAR 0
|
#define LEX_DOLLAR 0
|
|
|
/* An `.lcomm' directive with no explicit alignment parameter will
|
/* An `.lcomm' directive with no explicit alignment parameter will
|
use this macro to set P2VAR to the alignment that a request for
|
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
|
SIZE bytes will have. The alignment is expressed as a power of
|
two. If no alignment should take place, the macro definition
|
two. If no alignment should take place, the macro definition
|
should do nothing. Some targets define a `.bss' directive that is
|
should do nothing. Some targets define a `.bss' directive that is
|
also affected by this macro. The default definition will set
|
also affected by this macro. The default definition will set
|
P2VAR to the truncated power of two of sizes up to eight bytes. */
|
P2VAR to the truncated power of two of sizes up to eight bytes. */
|
#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0
|
#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0
|
|
|
/* We don't want gas to fixup the following program memory related relocations.
|
/* 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 will need them in case that we want to do linker relaxation.
|
We could in principle keep these fixups in gas when not relaxing.
|
We could in principle keep these fixups in gas when not relaxing.
|
However, there is no serious performance penilty when making the linker
|
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
|
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. */
|
sure that the fixup refers to some sort of lable. */
|
#define TC_VALIDATE_FIX(FIXP,SEG,SKIP) \
|
#define TC_VALIDATE_FIX(FIXP,SEG,SKIP) \
|
if ( (FIXP->fx_r_type == BFD_RELOC_AVR_7_PCREL \
|
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_13_PCREL \
|
|| FIXP->fx_r_type == BFD_RELOC_AVR_LO8_LDI_PM \
|
|| 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_LO8_LDI_GS \
|
|| FIXP->fx_r_type == BFD_RELOC_AVR_HI8_LDI_PM \
|
|| 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_HI8_LDI_GS \
|
|| FIXP->fx_r_type == BFD_RELOC_AVR_HH8_LDI_PM \
|
|| 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_LO8_LDI_PM_NEG \
|
|| FIXP->fx_r_type == BFD_RELOC_AVR_HI8_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_HH8_LDI_PM_NEG \
|
|| FIXP->fx_r_type == BFD_RELOC_AVR_16_PM) \
|
|| FIXP->fx_r_type == BFD_RELOC_AVR_16_PM) \
|
&& (FIXP->fx_addsy)) \
|
&& (FIXP->fx_addsy)) \
|
{ \
|
{ \
|
goto SKIP; \
|
goto SKIP; \
|
}
|
}
|
|
|
/* This target is buggy, and sets fix size too large. */
|
/* This target is buggy, and sets fix size too large. */
|
#define TC_FX_SIZE_SLACK(FIX) 2
|
#define TC_FX_SIZE_SLACK(FIX) 2
|
|
|
