gas/cgen.h

   1 /* GAS cgen support.
   2    Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2011
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #ifndef GAS_CGEN_H
  23 #define GAS_CGEN_H
  24
  25 /* Opcode table handle.  */
  26 extern CGEN_CPU_DESC gas_cgen_cpu_desc;
  27
  28 /* Maximum number of fixups in an insn.
  29    If you need to change this, allow target to override and do so there.  */
  30 #ifndef GAS_CGEN_MAX_FIXUPS
  31 #define GAS_CGEN_MAX_FIXUPS 3
  32 #endif
  33
  34 /* Struct defining result of gas_cgen_finish_insn.  */
  35 typedef struct
  36 {
  37   /* Frag containing the insn */
  38   fragS * frag;
  39   /* Address of insn in frag.  */
  40   char * addr;
  41   /* Number of fixups this insn has.  */
  42   int num_fixups;
  43   /* Array of fixups.  */
  44   fixS * fixups[GAS_CGEN_MAX_FIXUPS];
  45 } finished_insnS;
  46
  47 /* Callback for operand parsing.
  48    The result is an error message or NULL for success.
  49    The parsed value is stored in the bfd_vma *.  */
  50 extern const char * gas_cgen_parse_operand
  51      (CGEN_CPU_DESC, enum cgen_parse_operand_type,
  52       const char **, int, int, enum cgen_parse_operand_result *,
  53       bfd_vma *);
  54
  55 /* Call this from md_assemble to initialize the assembler callback.  */
  56 extern void gas_cgen_init_parse (void);
  57
  58 /* Routines and macros for saving fixup chains.  */
  59 extern void gas_cgen_save_fixups (int);
  60 extern void gas_cgen_restore_fixups (int);
  61 extern void gas_cgen_swap_fixups (int);
  62 extern void gas_cgen_initialize_saved_fixups_array (void);
  63 #define MAX_SAVED_FIXUP_CHAINS 50
  64
  65 /* Add a register to the assembler's hash table.
  66    This makes lets GAS parse registers for us.
  67    ??? This isn't currently used, but it could be in the future.  */
  68 extern void cgen_asm_record_register (char *, int);
  69
  70 /* After CGEN_SYM (assemble_insn) is done, this is called to
  71    output the insn and record any fixups.  */
  72 extern void gas_cgen_finish_insn (const CGEN_INSN *,
  73                                   CGEN_INSN_BYTES_PTR, unsigned int,
  74                                   int, finished_insnS *);
  75
  76 /* Record a fixup.  */
  77 extern fixS * gas_cgen_record_fixup (fragS *, int, const CGEN_INSN *,
  78                                      int, const CGEN_OPERAND *, int,
  79                                      symbolS *, offsetT);
  80 extern fixS * gas_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *,
  81                                          int, const CGEN_OPERAND *, int,
  82                                          expressionS *);
  83
  84 extern bfd_reloc_code_real_type gas_cgen_pcrel_r_type (bfd_reloc_code_real_type);
  85
  86 /* md_apply_fix handler.  */
  87 extern void gas_cgen_md_apply_fix (fixS *, valueT *, segT);
  88
  89 /* tc_gen_reloc handler.  */
  90 extern arelent *gas_cgen_tc_gen_reloc (asection *, fixS *);
  91
  92 /* Target supplied routine to lookup a reloc.  */
  93 extern bfd_reloc_code_real_type
  94 md_cgen_lookup_reloc (const CGEN_INSN *, const CGEN_OPERAND *, fixS *);
  95
  96 /* Optional target supplied routine to record a fixup for an expression.  */
  97 extern fixS *
  98 md_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *, int,
  99                           const CGEN_OPERAND *, int, expressionS *);
 100
 101 extern void gas_cgen_md_operand (expressionS *);
 102
 103 /* Perform any cgen specific initialisation for gas.  */
 104 extern void gas_cgen_begin (void);
 105
 106 #endif /* GAS_CGEN_H */