binutils-gdb/gas/cgen.h

/* GAS cgen support.
   Copyright 1998, 1999, 2000 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 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, 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

#ifndef GAS_CGEN_H
#define GAS_CGEN_H

/* Opcode table handle.  */
extern CGEN_CPU_DESC gas_cgen_cpu_desc;

/* Maximum number of fixups in an insn.
   If you need to change this, allow target to override and do so there.  */
#ifndef GAS_CGEN_MAX_FIXUPS
#define GAS_CGEN_MAX_FIXUPS 3
#endif

/* Struct defining result of gas_cgen_finish_insn.  */
typedef struct {
  /* frag containing the insn */
  fragS * frag;
  /* Address of insn in frag.  */
  char * addr;
  /* Number of fixups this insn has.  */
  int num_fixups;
  /* Array of fixups.  */
  fixS * fixups[GAS_CGEN_MAX_FIXUPS];
} finished_insnS;

/* Callback for operand parsing.
   The result is an error message or NULL for success.
   The parsed value is stored in the bfd_vma *.  */
extern const char * gas_cgen_parse_operand
     PARAMS ((CGEN_CPU_DESC, enum cgen_parse_operand_type,
	      const char **, int, int, enum cgen_parse_operand_result *,
	      bfd_vma *));

/* Call this from md_assemble to initialize the assembler callback.  */
extern void gas_cgen_init_parse PARAMS ((void));

/* Routines and macros for saving fixup chains. */
extern void gas_cgen_save_fixups PARAMS ((int));
extern void gas_cgen_restore_fixups PARAMS ((int));
extern void gas_cgen_swap_fixups PARAMS ((int));
extern void gas_cgen_initialize_saved_fixups_array PARAMS ((void));
#define MAX_SAVED_FIXUP_CHAINS 50

/* Add a register to the assembler's hash table.
   This makes lets GAS parse registers for us.
   ??? This isn't currently used, but it could be in the future.  */
extern void cgen_asm_record_register PARAMS ((char *, int));

/* After CGEN_SYM (assemble_insn) is done, this is called to
   output the insn and record any fixups.  */
extern void gas_cgen_finish_insn PARAMS ((const CGEN_INSN *,
					  CGEN_INSN_BYTES_PTR, unsigned int,
					  int, finished_insnS *));

/* Record a fixup.  */
extern fixS * gas_cgen_record_fixup PARAMS ((fragS *, int, const CGEN_INSN *,
					     int, const CGEN_OPERAND *, int,
					     symbolS *, offsetT));
extern fixS * gas_cgen_record_fixup_exp PARAMS ((fragS *, int, const CGEN_INSN *,
						 int, const CGEN_OPERAND *, int,
						 expressionS *));

/* md_apply_fix3 handler */
extern int gas_cgen_md_apply_fix3 PARAMS ((fixS *, valueT *, segT));

/* tc_gen_reloc handler */
extern arelent *gas_cgen_tc_gen_reloc PARAMS ((asection *, fixS *));

/* Target supplied routine to lookup a reloc.  */
extern bfd_reloc_code_real_type
md_cgen_lookup_reloc PARAMS ((const CGEN_INSN *, const CGEN_OPERAND *,
			      fixS *));

/* Optional target supplied routine to record a fixup for an expression.  */
extern fixS *
md_cgen_record_fixup_exp PARAMS ((fragS *, int, const CGEN_INSN *, int,
				  const CGEN_OPERAND *, int,
				  expressionS *));

#endif /* GAS_CGEN_H */