cgen.h revision 302408 
1/* GAS cgen support.
2   Copyright 1998, 1999, 2000, 2001, 2002, 2003
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 2, or (at your option)
10   any later version.
11
12   GAS is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public 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.  */
26extern 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.  */
35typedef struct {
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 *.  */
49extern 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.  */
55extern void gas_cgen_init_parse (void);
56
57/* Routines and macros for saving fixup chains.  */
58extern void gas_cgen_save_fixups (int);
59extern void gas_cgen_restore_fixups (int);
60extern void gas_cgen_swap_fixups (int);
61extern 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.  */
67extern 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.  */
71extern void gas_cgen_finish_insn (const CGEN_INSN *,
72				  CGEN_INSN_BYTES_PTR, unsigned int,
73				  int, finished_insnS *);
74
75/* Record a fixup.  */
76extern fixS * gas_cgen_record_fixup (fragS *, int, const CGEN_INSN *,
77				     int, const CGEN_OPERAND *, int,
78				     symbolS *, offsetT);
79extern fixS * gas_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *,
80					 int, const CGEN_OPERAND *, int,
81					 expressionS *);
82
83/* md_apply_fix handler */
84extern void gas_cgen_md_apply_fix (fixS *, valueT *, segT);
85
86/* tc_gen_reloc handler */
87extern arelent *gas_cgen_tc_gen_reloc (asection *, fixS *);
88
89/* Target supplied routine to lookup a reloc.  */
90extern bfd_reloc_code_real_type
91md_cgen_lookup_reloc (const CGEN_INSN *, const CGEN_OPERAND *, fixS *);
92
93/* Optional target supplied routine to record a fixup for an expression.  */
94extern fixS *
95md_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *, int,
96			  const CGEN_OPERAND *, int, expressionS *);
97
98extern void gas_cgen_md_operand (expressionS *);
99
100/* Perform any cgen specific initialisation for gas.  */
101extern void gas_cgen_begin (void);
102
103#endif /* GAS_CGEN_H */
104