cgen.h revision 85815 
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     PARAMS ((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 PARAMS ((void));
55
56extern void gas_cgen_save_fixups PARAMS ((void));
57extern void gas_cgen_restore_fixups PARAMS ((void));
58extern void gas_cgen_swap_fixups PARAMS ((void));
59
60/* Add a register to the assembler's hash table.
61   This makes lets GAS parse registers for us.
62   ??? This isn't currently used, but it could be in the future.  */
63extern void cgen_asm_record_register PARAMS ((char *, int));
64
65/* After CGEN_SYM (assemble_insn) is done, this is called to
66   output the insn and record any fixups.  */
67extern void gas_cgen_finish_insn PARAMS ((const CGEN_INSN *,
68					  CGEN_INSN_BYTES_PTR, unsigned int,
69					  int, finished_insnS *));
70
71/* Record a fixup.  */
72extern fixS * gas_cgen_record_fixup PARAMS ((fragS *, int, const CGEN_INSN *,
73					     int, const CGEN_OPERAND *, int,
74					     symbolS *, offsetT));
75extern fixS * gas_cgen_record_fixup_exp PARAMS ((fragS *, int, const CGEN_INSN *,
76						 int, const CGEN_OPERAND *, int,
77						 expressionS *));
78
79/* md_apply_fix3 handler */
80extern int gas_cgen_md_apply_fix3 PARAMS ((fixS *, valueT *, segT));
81
82/* tc_gen_reloc handler */
83extern arelent *gas_cgen_tc_gen_reloc PARAMS ((asection *, fixS *));
84
85/* Target supplied routine to lookup a reloc.  */
86extern bfd_reloc_code_real_type
87md_cgen_lookup_reloc PARAMS ((const CGEN_INSN *, const CGEN_OPERAND *,
88			      fixS *));
89
90/* Optional target supplied routine to record a fixup for an expression.  */
91extern fixS *
92md_cgen_record_fixup_exp PARAMS ((fragS *, int, const CGEN_INSN *, int,
93				  const CGEN_OPERAND *, int,
94				  expressionS *));
95
96#endif /* GAS_CGEN_H */
97