1 /* GAS cgen support.
2    Copyright (C) 1998-2016 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