gas/cgen.h

   1 /* GAS cgen support.
   2    Copyright 1998, 1999, 2000 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21 #ifndef GAS_CGEN_H
  22 #define GAS_CGEN_H
  23
  24 /* Opcode table handle.  */
  25 extern CGEN_CPU_DESC gas_cgen_cpu_desc;
  26
  27 /* Maximum number of fixups in an insn.
  28    If you need to change this, allow target to override and do so there.  */
  29 #ifndef GAS_CGEN_MAX_FIXUPS
  30 #define GAS_CGEN_MAX_FIXUPS 3
  31 #endif
  32
  33 /* Struct defining result of gas_cgen_finish_insn.  */
  34 typedef struct {
  35   /* frag containing the insn */
  36   fragS * frag;
  37   /* Address of insn in frag.  */
  38   char * addr;
  39   /* Number of fixups this insn has.  */
  40   int num_fixups;
  41   /* Array of fixups.  */
  42   fixS * fixups[GAS_CGEN_MAX_FIXUPS];
  43 } finished_insnS;
  44
  45 /* Callback for operand parsing.
  46    The result is an error message or NULL for success.
  47    The parsed value is stored in the bfd_vma *.  */
  48 extern const char * gas_cgen_parse_operand
  49      (CGEN_CPU_DESC, enum cgen_parse_operand_type,
  50       const char **, int, int, enum cgen_parse_operand_result *,
  51       bfd_vma *);
  52
  53 /* Call this from md_assemble to initialize the assembler callback.  */
  54 extern void gas_cgen_init_parse (void);
  55
  56 /* Routines and macros for saving fixup chains.  */
  57 extern void gas_cgen_save_fixups (int);
  58 extern void gas_cgen_restore_fixups (int);
  59 extern void gas_cgen_swap_fixups (int);
  60 extern void gas_cgen_initialize_saved_fixups_array (void);
  61 #define MAX_SAVED_FIXUP_CHAINS 50
  62
  63 /* Add a register to the assembler's hash table.
  64    This makes lets GAS parse registers for us.
  65    ??? This isn't currently used, but it could be in the future.  */
  66 extern void cgen_asm_record_register (char *, int);
  67
  68 /* After CGEN_SYM (assemble_insn) is done, this is called to
  69    output the insn and record any fixups.  */
  70 extern void gas_cgen_finish_insn (const CGEN_INSN *,
  71                                   CGEN_INSN_BYTES_PTR, unsigned int,
  72                                   int, finished_insnS *);
  73
  74 /* Record a fixup.  */
  75 extern fixS * gas_cgen_record_fixup (fragS *, int, const CGEN_INSN *,
  76                                      int, const CGEN_OPERAND *, int,
  77                                      symbolS *, offsetT);
  78 extern fixS * gas_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *,
  79                                          int, const CGEN_OPERAND *, int,
  80                                          expressionS *);
  81
  82 /* md_apply_fix3 handler */
  83 extern void gas_cgen_md_apply_fix3 (fixS *, valueT *, segT);
  84
  85 /* tc_gen_reloc handler */
  86 extern arelent *gas_cgen_tc_gen_reloc (asection *, fixS *);
  87
  88 /* Target supplied routine to lookup a reloc.  */
  89 extern bfd_reloc_code_real_type
  90 md_cgen_lookup_reloc (const CGEN_INSN *, const CGEN_OPERAND *, fixS *);
  91
  92 /* Optional target supplied routine to record a fixup for an expression.  */
  93 extern fixS *
  94 md_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *, int,
  95                           const CGEN_OPERAND *, int, expressionS *);
  96
  97 extern void gas_cgen_md_operand (expressionS *);
  98
  99 /* Perform any cgen specific initialisation for gas.  */
 100 extern void gas_cgen_begin (void);
 101
 102 #endif /* GAS_CGEN_H */