cgen.h revision 130562 
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.  */
25extern 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.  */
34typedef 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 *.  */
48extern 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.  */
54extern void gas_cgen_init_parse (void);
55
56/* Routines and macros for saving fixup chains.  */
57extern void gas_cgen_save_fixups (int);
58extern void gas_cgen_restore_fixups (int);
59extern void gas_cgen_swap_fixups (int);
60extern 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.  */
66extern 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.  */
70extern void gas_cgen_finish_insn (const CGEN_INSN *,
71				  CGEN_INSN_BYTES_PTR, unsigned int,
72				  int, finished_insnS *);
73
74/* Record a fixup.  */
75extern fixS * gas_cgen_record_fixup (fragS *, int, const CGEN_INSN *,
76				     int, const CGEN_OPERAND *, int,
77				     symbolS *, offsetT);
78extern 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 */
83extern void gas_cgen_md_apply_fix3 (fixS *, valueT *, segT);
84
85/* tc_gen_reloc handler */
86extern arelent *gas_cgen_tc_gen_reloc (asection *, fixS *);
87
88/* Target supplied routine to lookup a reloc.  */
89extern bfd_reloc_code_real_type
90md_cgen_lookup_reloc (const CGEN_INSN *, const CGEN_OPERAND *, fixS *);
91
92/* Optional target supplied routine to record a fixup for an expression.  */
93extern fixS *
94md_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *, int,
95			  const CGEN_OPERAND *, int, expressionS *);
96
97extern void gas_cgen_md_operand (expressionS *);
98
99/* Perform any cgen specific initialisation for gas.  */
100extern void gas_cgen_begin (void);
101
102#endif /* GAS_CGEN_H */
103