1 /* tc-mips.h -- header file for tc-mips.c.
2 Copyright (C) 1993-2023 Free Software Foundation, Inc.
3 Contributed by the OSF and Ralph Campbell.
4 Written by Keith Knowles and Ralph Campbell, working independently.
5 Modified for ECOFF support by Ian Lance Taylor of Cygnus Support.
6
7 This file is part of GAS.
8
9 GAS is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
12 any later version.
13
14 GAS is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with GAS; see the file COPYING. If not, write to the Free
21 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
22 02110-1301, USA. */
23
24 #ifndef TC_MIPS
25 #define TC_MIPS
26
27 struct frag;
28 struct expressionS;
29
30 /* Default to big endian. */
31 #ifndef TARGET_BYTES_BIG_ENDIAN
32 #define TARGET_BYTES_BIG_ENDIAN 1
33 #endif
34
35 #define TARGET_ARCH bfd_arch_mips
36
37 #define WORKING_DOT_WORD 1
38 #define OLD_FLOAT_READS
39 #define REPEAT_CONS_EXPRESSIONS
40 #define RELOC_EXPANSION_POSSIBLE
41 #define MAX_RELOC_EXPANSION 3
42 #define LOCAL_LABELS_FB 1
43
44 #define TC_ADDRESS_BYTES mips_address_bytes
45 extern int mips_address_bytes (void);
46
47 /* Maximum symbol offset that can be encoded in a BFD_RELOC_GPREL16
48 relocation. */
49 #define MAX_GPREL_OFFSET (0x7FF0)
50
51 #define md_relax_frag(segment, fragp, stretch) \
52 mips_relax_frag(segment, fragp, stretch)
53 extern int mips_relax_frag (asection *, struct frag *, long);
54
55 #define md_undefined_symbol(name) (0)
56 #define md_operand(x)
57
58 extern char mips_nop_opcode (void);
59 #define NOP_OPCODE (mips_nop_opcode ())
60
61 extern void mips_handle_align (struct frag *);
62 #define HANDLE_ALIGN(fragp) mips_handle_align (fragp)
63
64 #define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4)
65
66 struct insn_label_list;
67 struct mips_segment_info {
68 struct insn_label_list *labels;
69 unsigned int mips16 : 1;
70 unsigned int micromips : 1;
71 };
72 #define TC_SEGMENT_INFO_TYPE struct mips_segment_info
73
74 /* This field is nonzero if the symbol is the target of a MIPS16 jump. */
75 #define TC_SYMFIELD_TYPE int
76
77 /* Tell assembler that we have an itbl_mips.h header file to include. */
78 #define HAVE_ITBL_CPU
79
80 /* The endianness of the target format may change based on command
81 line arguments. */
82 #define TARGET_FORMAT mips_target_format()
83 extern const char *mips_target_format (void);
84
85 /* MIPS PIC level. */
86
87 enum mips_pic_level
88 {
89 /* Do not generate PIC code. */
90 NO_PIC,
91
92 /* Generate PIC code as in the SVR4 MIPS ABI. */
93 SVR4_PIC,
94
95 /* VxWorks's PIC model. */
96 VXWORKS_PIC
97 };
98
99 extern enum mips_pic_level mips_pic;
100
101 extern int tc_get_register (int frame);
102
103 #define md_after_parse_args() mips_after_parse_args()
104 extern void mips_after_parse_args (void);
105
106 #define tc_init_after_args() mips_init_after_args()
107 extern void mips_init_after_args (void);
108
109 #define md_parse_long_option(arg) mips_parse_long_option (arg)
110 extern int mips_parse_long_option (const char *);
111
112 #define tc_frob_label(sym) mips_define_label (sym)
113 extern void mips_define_label (symbolS *);
114
115 #define tc_new_dot_label(sym) mips_add_dot_label (sym)
116 extern void mips_add_dot_label (symbolS *);
117
118 #define tc_frob_file_before_adjust() mips_frob_file_before_adjust ()
119 extern void mips_frob_file_before_adjust (void);
120
121 #define tc_frob_file_before_fix() mips_frob_file ()
122 extern void mips_frob_file (void);
123
124 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
125 #define tc_frob_file_after_relocs mips_frob_file_after_relocs
126 extern void mips_frob_file_after_relocs (void);
127 #endif
128
129 #ifdef TE_IRIX
130 #define tc_frob_symbol(sym, punt) mips_frob_symbol (sym)
131 extern void mips_frob_symbol (symbolS *);
132 #endif
133
134 #define tc_fix_adjustable(fixp) mips_fix_adjustable (fixp)
135 extern int mips_fix_adjustable (struct fix *);
136
137 /* Values passed to md_apply_fix don't include symbol values. */
138 #define MD_APPLY_SYM_VALUE(FIX) 0
139
140 /* Global syms must not be resolved, to support ELF shared libraries. */
141 #define EXTERN_FORCE_RELOC \
142 (OUTPUT_FLAVOR == bfd_target_elf_flavour)
143
144 #define TC_FORCE_RELOCATION(FIX) mips_force_relocation (FIX)
145 extern int mips_force_relocation (struct fix *);
146
147 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
148 (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEG) \
149 || mips_force_relocation (FIX))
150
151 #define TC_FORCE_RELOCATION_ABS(FIX) mips_force_relocation_abs (FIX)
152 extern bool mips_force_relocation_abs (struct fix *);
153
154 /* Register mask variables. These are set by the MIPS assembly code
155 and used by ECOFF and possibly other object file formats. */
156 extern unsigned long mips_gprmask;
157 extern unsigned long mips_cprmask[4];
158
159 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
160
161 #define elf_tc_final_processing mips_elf_final_processing
162 extern void mips_elf_final_processing (void);
163
164 #endif
165
166 extern void mips_md_finish (void);
167 #define md_finish() mips_md_finish()
168
169 extern void mips_pop_insert (void);
170 #define md_pop_insert() mips_pop_insert()
171
172 extern void mips_emit_delays (void);
173 #define md_flush_pending_output mips_emit_delays
174
175 extern void mips_enable_auto_align (void);
176 #define md_elf_section_change_hook() mips_enable_auto_align()
177
178 #ifdef TE_IRIX
179 enum dwarf2_format;
180 extern enum dwarf2_format mips_dwarf2_format (asection *);
181 # define DWARF2_FORMAT(SEC) mips_dwarf2_format (SEC)
182 #else
183 /* Use GAS' defaults. */
184 #endif
185
186 extern int mips_dwarf2_addr_size (void);
187 #define DWARF2_ADDR_SIZE(bfd) mips_dwarf2_addr_size ()
188 #define DWARF2_FDE_RELOC_SIZE (compact_eh ? 4 : mips_dwarf2_addr_size ())
189 #define DWARF2_FDE_RELOC_ENCODING(enc) \
190 (enc | (compact_eh ? DW_EH_PE_pcrel : 0))
191
192 #define TARGET_USE_CFIPOP 1
193
194 #define tc_cfi_frame_initial_instructions mips_cfi_frame_initial_instructions
195 extern void mips_cfi_frame_initial_instructions (void);
196
197 #define tc_regname_to_dw2regnum tc_mips_regname_to_dw2regnum
198 extern int tc_mips_regname_to_dw2regnum (char *regname);
199
200 #define DWARF2_DEFAULT_RETURN_COLUMN 31
201 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
202
203 #if defined(OBJ_ELF)
204
205 #define tc_cfi_reloc_for_encoding mips_cfi_reloc_for_encoding
206 extern bfd_reloc_code_real_type mips_cfi_reloc_for_encoding (int encoding);
207
208 #define tc_compact_eh_opcode_stop 0x5c
209 #define tc_compact_eh_opcode_pad 0x5f
210
211 #endif
212 #define DIFF_EXPR_OK
213 /* We define DIFF_EXPR_OK because of R_MIPS_PC32, but we have no
214 64-bit form for n64 CFIs. */
215 #define CFI_DIFF_EXPR_OK 0
216
217 #define CONVERT_SYMBOLIC_ATTRIBUTE(name) mips_convert_symbolic_attribute (name)
218 extern int mips_convert_symbolic_attribute (const char *);
219
220 #endif /* TC_MIPS */