gas/cgen.h

   1 /* GAS cgen support.
   2    Copyright (C) 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 {
  36   /* frag containing the insn */
  37   fragS * frag;
  38   /* Address of insn in frag.  */
  39   char * addr;
  40   /* Number of fixups this insn has.  */
  41   int num_fixups;
  42   /* Array of fixups.  */
  43   fixS * fixups[GAS_CGEN_MAX_FIXUPS];
  44 } finished_insnS;
  45
  46 /* Callback for operand parsing.
  47    The result is an error message or NULL for success.
  48    The parsed value is stored in the bfd_vma *.  */
  49 extern const char * gas_cgen_parse_operand
  50      PARAMS ((CGEN_CPU_DESC, enum cgen_parse_operand_type,
  51               const char **, int, int, enum cgen_parse_operand_result *,
  52               bfd_vma *));
  53
  54 /* Call this from md_assemble to initialize the assembler callback.  */
  55 extern void gas_cgen_init_parse PARAMS ((void));
  56
  57 extern void gas_cgen_save_fixups PARAMS ((void));
  58 extern void gas_cgen_restore_fixups PARAMS ((void));
  59 extern void gas_cgen_swap_fixups PARAMS ((void));
  60
  61 /* Add a register to the assembler's hash table.
  62    This makes lets GAS parse registers for us.
  63    ??? This isn't currently used, but it could be in the future.  */
  64 extern void cgen_asm_record_register PARAMS ((char *, int));
  65
  66 /* After CGEN_SYM (assemble_insn) is done, this is called to
  67    output the insn and record any fixups.  */
  68 extern void gas_cgen_finish_insn PARAMS ((const CGEN_INSN *,
  69                                           CGEN_INSN_BYTES_PTR, unsigned int,
  70                                           int, finished_insnS *));
  71
  72 /* Record a fixup.  */
  73 extern fixS * gas_cgen_record_fixup PARAMS ((fragS *, int, const CGEN_INSN *,
  74                                              int, const CGEN_OPERAND *, int,
  75                                              symbolS *, offsetT));
  76 extern fixS * gas_cgen_record_fixup_exp PARAMS ((fragS *, int, const CGEN_INSN *,
  77                                                  int, const CGEN_OPERAND *, int,
  78                                                  expressionS *));
  79
  80 /* md_apply_fix3 handler */
  81 extern int gas_cgen_md_apply_fix3 PARAMS ((fixS *, valueT *, segT));
  82
  83 /* tc_gen_reloc handler */
  84 extern arelent *gas_cgen_tc_gen_reloc PARAMS ((asection *, fixS *));
  85
  86 /* Target supplied routine to lookup a reloc.  */
  87 extern bfd_reloc_code_real_type
  88 md_cgen_lookup_reloc PARAMS ((const CGEN_INSN *, const CGEN_OPERAND *,
  89                               fixS *));
  90
  91 /* Optional target supplied routine to record a fixup for an expression.  */
  92 extern fixS *
  93 md_cgen_record_fixup_exp PARAMS ((fragS *, int, const CGEN_INSN *, int,
  94                                   const CGEN_OPERAND *, int,
  95                                   expressionS *));
  96
  97 #endif /* GAS_CGEN_H */