1/* tc-mips.h -- header file for tc-mips.c.
2   Copyright 1993, 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2003, 2004,
3   2005, 2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.
4   Contributed by the OSF and Ralph Campbell.
5   Written by Keith Knowles and Ralph Campbell, working independently.
6   Modified for ECOFF support by Ian Lance Taylor of Cygnus Support.
7
8   This file is part of GAS.
9
10   GAS is free software; you can redistribute it and/or modify
11   it under the terms of the GNU General Public License as published by
12   the Free Software Foundation; either version 3, or (at your option)
13   any later version.
14
15   GAS is distributed in the hope that it will be useful,
16   but WITHOUT ANY WARRANTY; without even the implied warranty of
17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18   GNU General Public License for more details.
19
20   You should have received a copy of the GNU General Public License
21   along with GAS; see the file COPYING.  If not, write to the Free
22   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23   02110-1301, USA.  */
24
25#ifndef TC_MIPS
26#define TC_MIPS
27
28struct frag;
29struct expressionS;
30
31/* Default to big endian.  */
32#ifndef TARGET_BYTES_BIG_ENDIAN
33#define TARGET_BYTES_BIG_ENDIAN		1
34#endif
35
36#define TARGET_ARCH bfd_arch_mips
37
38#define WORKING_DOT_WORD	1
39#define OLD_FLOAT_READS
40#define REPEAT_CONS_EXPRESSIONS
41#define RELOC_EXPANSION_POSSIBLE
42#define MAX_RELOC_EXPANSION 3
43#define LOCAL_LABELS_FB 1
44
45/* Maximum symbol offset that can be encoded in a BFD_RELOC_GPREL16
46   relocation.  */
47#define MAX_GPREL_OFFSET (0x7FF0)
48
49#define md_relax_frag(segment, fragp, stretch) \
50  mips_relax_frag(segment, fragp, stretch)
51extern int mips_relax_frag (asection *, struct frag *, long);
52
53#define md_undefined_symbol(name)	(0)
54#define md_operand(x)
55
56extern char mips_nop_opcode (void);
57#define NOP_OPCODE (mips_nop_opcode ())
58
59extern void mips_handle_align (struct frag *);
60#define HANDLE_ALIGN(fragp)  mips_handle_align (fragp)
61
62#define MAX_MEM_FOR_RS_ALIGN_CODE  (3 + 4)
63
64struct insn_label_list;
65struct mips_segment_info {
66  struct insn_label_list *labels;
67  unsigned int mips16 : 1;
68};
69#define TC_SEGMENT_INFO_TYPE struct mips_segment_info
70
71/* This field is nonzero if the symbol is the target of a MIPS16 jump.  */
72#define TC_SYMFIELD_TYPE int
73
74/* Tell assembler that we have an itbl_mips.h header file to include.  */
75#define HAVE_ITBL_CPU
76
77/* The endianness of the target format may change based on command
78   line arguments.  */
79#define TARGET_FORMAT mips_target_format()
80extern const char *mips_target_format (void);
81
82/* MIPS PIC level.  */
83
84enum mips_pic_level
85{
86  /* Do not generate PIC code.  */
87  NO_PIC,
88
89  /* Generate PIC code as in the SVR4 MIPS ABI.  */
90  SVR4_PIC,
91
92  /* VxWorks's PIC model.  */
93  VXWORKS_PIC
94};
95
96extern enum mips_pic_level mips_pic;
97
98extern int tc_get_register (int frame);
99
100#define md_after_parse_args() mips_after_parse_args()
101extern void mips_after_parse_args (void);
102
103#define tc_init_after_args() mips_init_after_args()
104extern void mips_init_after_args (void);
105
106#define md_parse_long_option(arg) mips_parse_long_option (arg)
107extern int mips_parse_long_option (const char *);
108
109#define tc_frob_label(sym) mips_define_label (sym)
110extern void mips_define_label (symbolS *);
111
112#define tc_new_dot_label(sym) mips_record_label (sym)
113extern void mips_record_label (symbolS *);
114
115#define tc_frob_file_before_adjust() mips_frob_file_before_adjust ()
116extern void mips_frob_file_before_adjust (void);
117
118#define tc_frob_file_before_fix() mips_frob_file ()
119extern void mips_frob_file (void);
120
121#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
122#define tc_frob_file_after_relocs mips_frob_file_after_relocs
123extern void mips_frob_file_after_relocs (void);
124#endif
125
126#define tc_fix_adjustable(fixp) mips_fix_adjustable (fixp)
127extern int mips_fix_adjustable (struct fix *);
128
129/* Values passed to md_apply_fix don't include symbol values.  */
130#define MD_APPLY_SYM_VALUE(FIX) 0
131
132/* Global syms must not be resolved, to support ELF shared libraries.  */
133#define EXTERN_FORCE_RELOC			\
134  (OUTPUT_FLAVOR == bfd_target_elf_flavour)
135
136/* When generating NEWABI code, we may need to have to keep combined
137   relocations which don't have symbols.  */
138#define TC_FORCE_RELOCATION(FIX) mips_force_relocation (FIX)
139extern int mips_force_relocation (struct fix *);
140
141#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
142  (! SEG_NORMAL (SEG) || mips_force_relocation (FIX))
143
144/* Register mask variables.  These are set by the MIPS assembly code
145   and used by ECOFF and possibly other object file formats.  */
146extern unsigned long mips_gprmask;
147extern unsigned long mips_cprmask[4];
148
149#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
150
151#define elf_tc_final_processing mips_elf_final_processing
152extern void mips_elf_final_processing (void);
153
154#endif
155
156extern void md_mips_end (void);
157#define md_end()	md_mips_end()
158
159extern void mips_pop_insert (void);
160#define md_pop_insert()		mips_pop_insert()
161
162extern void mips_emit_delays (void);
163#define md_flush_pending_output mips_emit_delays
164
165extern void mips_enable_auto_align (void);
166#define md_elf_section_change_hook()	mips_enable_auto_align()
167
168#ifdef TE_IRIX
169enum dwarf2_format;
170extern enum dwarf2_format mips_dwarf2_format (asection *);
171# define DWARF2_FORMAT(SEC) mips_dwarf2_format (SEC)
172#else
173/* Use GAS' defaults.  */
174#endif
175
176extern int mips_dwarf2_addr_size (void);
177#define DWARF2_ADDR_SIZE(bfd) mips_dwarf2_addr_size ()
178#define DWARF2_FDE_RELOC_SIZE mips_dwarf2_addr_size ()
179
180#define TARGET_USE_CFIPOP 1
181
182#define tc_cfi_frame_initial_instructions mips_cfi_frame_initial_instructions
183extern void mips_cfi_frame_initial_instructions (void);
184
185#define tc_regname_to_dw2regnum tc_mips_regname_to_dw2regnum
186extern int tc_mips_regname_to_dw2regnum (char *regname);
187
188#define DWARF2_DEFAULT_RETURN_COLUMN 31
189#define DWARF2_CIE_DATA_ALIGNMENT (-4)
190
191#endif /* TC_MIPS */
192