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      1 /* GAS cgen support.
      2    Copyright (C) 1998-2014 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 3, or (at your option)
      9    any later version.
     10 
     11    GAS is distributed in the hope that it will be useful, but WITHOUT
     12    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     13    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
     14    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, 51 Franklin Street - Fifth Floor, Boston, MA
     19    02110-1301, 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      (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 (void);
     56 
     57 /* Routines and macros for saving fixup chains.  */
     58 extern void gas_cgen_save_fixups (int);
     59 extern void gas_cgen_restore_fixups (int);
     60 extern void gas_cgen_swap_fixups (int);
     61 extern void gas_cgen_initialize_saved_fixups_array (void);
     62 #define MAX_SAVED_FIXUP_CHAINS 50
     63 
     64 /* Add a register to the assembler's hash table.
     65    This makes lets GAS parse registers for us.
     66    ??? This isn't currently used, but it could be in the future.  */
     67 extern void cgen_asm_record_register (char *, int);
     68 
     69 /* After CGEN_SYM (assemble_insn) is done, this is called to
     70    output the insn and record any fixups.  */
     71 extern void gas_cgen_finish_insn (const CGEN_INSN *,
     72 				  CGEN_INSN_BYTES_PTR, unsigned int,
     73 				  int, finished_insnS *);
     74 
     75 /* Record a fixup.  */
     76 extern fixS * gas_cgen_record_fixup (fragS *, int, const CGEN_INSN *,
     77 				     int, const CGEN_OPERAND *, int,
     78 				     symbolS *, offsetT);
     79 extern fixS * gas_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *,
     80 					 int, const CGEN_OPERAND *, int,
     81 					 expressionS *);
     82 
     83 extern bfd_reloc_code_real_type gas_cgen_pcrel_r_type (bfd_reloc_code_real_type);
     84 
     85 /* md_apply_fix handler.  */
     86 extern void gas_cgen_md_apply_fix (fixS *, valueT *, segT);
     87 
     88 /* tc_gen_reloc handler.  */
     89 extern arelent *gas_cgen_tc_gen_reloc (asection *, fixS *);
     90 
     91 /* Target supplied routine to lookup a reloc.  */
     92 extern bfd_reloc_code_real_type
     93 md_cgen_lookup_reloc (const CGEN_INSN *, const CGEN_OPERAND *, fixS *);
     94 
     95 /* Optional target supplied routine to record a fixup for an expression.  */
     96 extern fixS *
     97 md_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *, int,
     98 			  const CGEN_OPERAND *, int, expressionS *);
     99 
    100 extern void gas_cgen_md_operand (expressionS *);
    101 
    102 /* Perform any cgen specific initialisation for gas.  */
    103 extern void gas_cgen_begin (void);
    104 
    105 #endif /* GAS_CGEN_H */
    106