binutils-gdb/gas/config/tc-m68k.h

/* This file is tc-m68k.h
   Copyright 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   Free Software Foundation, Inc.

   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.  */

#define TC_M68K 1

struct fix;

#define TARGET_BYTES_BIG_ENDIAN 1

#ifdef OBJ_AOUT
#ifdef TE_SUN3
#define TARGET_FORMAT "a.out-sunos-big"
#endif
#ifdef TE_NetBSD
#define TARGET_FORMAT "a.out-m68k-netbsd"
#endif
#ifdef TE_LINUX
#define TARGET_FORMAT "a.out-m68k-linux"
#endif
#ifndef TARGET_FORMAT
#define TARGET_FORMAT "a.out-zero-big"
#endif
#endif

#ifdef OBJ_ELF
#define TARGET_FORMAT "elf32-m68k"
#endif

#ifdef TE_APOLLO
#define COFF_MAGIC		APOLLOM68KMAGIC
#define COFF_AOUTHDR_MAGIC	APOLLO_COFF_VERSION_NUMBER
#undef OBJ_COFF_OMIT_OPTIONAL_HEADER
#endif

#ifdef TE_AUX
#define TARGET_FORMAT		"coff-m68k-aux"
#endif
#ifdef TE_DELTA
#define TARGET_FORMAT		"coff-m68k-sysv"
#endif

#ifndef COFF_MAGIC
#define COFF_MAGIC MC68MAGIC
#endif
#define TARGET_ARCH bfd_arch_m68k

#define tc_comment_chars m68k_comment_chars
extern const char *m68k_comment_chars;

#define LISTING_WORD_SIZE 2	/* A word is 2 bytes */
#define LISTING_LHS_WIDTH 2	/* One word on the first line */
#define LISTING_LHS_WIDTH_SECOND 2	/* One word on the second line */
#define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
#define LISTING_HEADER "68K GAS "

#ifndef REGISTER_PREFIX
#define REGISTER_PREFIX '%'
#endif

#if !defined (REGISTER_PREFIX_OPTIONAL)
#if defined (M68KCOFF) || defined (OBJ_ELF)
#define REGISTER_PREFIX_OPTIONAL 0
#else /* ! (COFF || ELF) */
#define REGISTER_PREFIX_OPTIONAL 1
#endif /* ! (COFF || ELF) */
#endif /* not def REGISTER_PREFIX and not def OPTIONAL_REGISTER_PREFIX */

#ifdef TE_DELTA
/* On the Delta, `%' can occur within a label name, but not as the
   initial character.  */
#define LEX_PCT LEX_NAME
/* On the Delta, `~' can start a label name, but is converted to '.'.  */
#define LEX_TILDE LEX_BEGIN_NAME
#define tc_canonicalize_symbol_name(s) ((*(s) == '~' ? *(s) = '.' : '.'), s)
/* On the Delta, dots are not required before pseudo-ops.  */
#define NO_PSEUDO_DOT 1
#endif

extern void m68k_mri_mode_change (int);
#define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)

extern int m68k_conditional_pseudoop (pseudo_typeS *);
#define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)

extern void m68k_frob_label (symbolS *);
#define tc_frob_label(sym) m68k_frob_label (sym)

extern void m68k_flush_pending_output (void);
#define md_flush_pending_output() m68k_flush_pending_output ()

extern void m68k_frob_symbol (symbolS *);

#define tc_frob_symbol(sym,punt)				\
do								\
  {								\
    if (S_GET_SEGMENT (sym) == reg_section)			\
      punt = 1;							\
    m68k_frob_symbol (sym);					\
  }								\
while (0)

#define NO_RELOC BFD_RELOC_NONE
#define RELAX_RELOC_ABS8  BFD_RELOC_8
#define RELAX_RELOC_ABS16 BFD_RELOC_16
#define RELAX_RELOC_ABS32 BFD_RELOC_32
#define RELAX_RELOC_PC8   BFD_RELOC_8_PCREL
#define RELAX_RELOC_PC16  BFD_RELOC_16_PCREL
#define RELAX_RELOC_PC32  BFD_RELOC_32_PCREL

#ifdef OBJ_ELF
#define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
extern int tc_m68k_fix_adjustable (struct fix *);

/* Target *-*-elf implies an embedded target.  No shared libs.
   *-*-uclinux also requires special casing to prevent GAS from
   generating unsupported R_68K_PC16 relocs.  */
#define EXTERN_FORCE_RELOC \
  ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))

/* Values passed to md_apply_fix don't include symbol values.  */
#define MD_APPLY_SYM_VALUE(FIX) 0

#define elf_tc_final_processing m68k_elf_final_processing
extern void m68k_elf_final_processing (void);
#endif

#define DIFF_EXPR_OK

extern int m68k_parse_long_option (char *);
#define md_parse_long_option m68k_parse_long_option

#define md_operand(x)

#define TARGET_ARCH bfd_arch_m68k

extern struct relax_type md_relax_table[];
#define TC_GENERIC_RELAX_TABLE md_relax_table

/* We can't do a byte jump to the next instruction, so in that case
   force word mode by faking AIM.  */
#define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
  do									  \
    {								 	  \
      if (aim == 0 && this_type->rlx_forward == 127)			  \
        aim = 128;							  \
    }									  \
  while (0)

#define DWARF2_LINE_MIN_INSN_LENGTH 2

/* We want .cfi_* pseudo-ops for generating unwind info.  */
#define TARGET_USE_CFIPOP 1

#define DWARF2_DEFAULT_RETURN_COLUMN 24
#define DWARF2_CIE_DATA_ALIGNMENT (-4)

#define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
extern int tc_m68k_regname_to_dw2regnum (char *regname);

#define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
extern void tc_m68k_frame_initial_instructions (void);

#ifdef TE_UCLINUX
/* elf2flt does not honor PT_LOAD's from the executable.
   .text and .eh_frame sections will not end up in the same segment and so
   we cannot use PC-relative encoding for CFI.  */
# define CFI_DIFF_EXPR_OK 0

/* However, follow compiler's guidance when it specifies encoding for LSDA.  */
# define CFI_DIFF_LSDA_OK 1
#endif