1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
|
/* tc-nds32.h -- Header file for tc-nds32.c.
Copyright (C) 2012-2021 Free Software Foundation, Inc.
Contributed by Andes Technology Corporation.
This file is part of GAS.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#ifndef TC_NDS32
#define TC_NDS32
#include <stdint.h>
/* Enum mapping symbol. */
enum mstate
{
MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */
MAP_DATA,
MAP_CODE,
};
#define TC_SEGMENT_INFO_TYPE struct nds32_segment_info_type
/* For mapping symbol. */
struct nds32_segment_info_type
{
enum mstate mapstate;
};
#define LISTING_HEADER \
(target_big_endian ? "NDS32 GAS" : "NDS32 GAS Little Endian")
/* The target BFD architecture. */
#define TARGET_ARCH bfd_arch_nds32
/* mapping to mach_table[5] */
#define ISA_V1 bfd_mach_n1h
#define ISA_V2 bfd_mach_n1h_v2
#define ISA_V3 bfd_mach_n1h_v3
#define ISA_V3M bfd_mach_n1h_v3m
/* Default to big endian. Please note that for Andes architecture,
instructions are always in big-endian format. */
#ifndef TARGET_BYTES_BIG_ENDIAN
#define TARGET_BYTES_BIG_ENDIAN 1
#endif
/* as.c. */
/* Extend GAS command line option handling capability. */
extern int nds32_parse_option (int, const char *);
extern void nds32_after_parse_args (void);
/* The endianness of the target format may change based on command
line arguments. */
extern const char * nds32_target_format (void);
#define md_parse_option(optc, optarg) nds32_parse_option (optc, optarg)
#define md_after_parse_args() nds32_after_parse_args ()
#define TARGET_FORMAT nds32_target_format()
/* expr.c */
extern int nds32_parse_name (char const *, expressionS *, enum expr_mode, char *);
extern bool nds32_allow_local_subtract (expressionS *, expressionS *, segT);
#define md_parse_name(name, exprP, mode, nextcharP) \
nds32_parse_name (name, exprP, mode, nextcharP)
#define md_allow_local_subtract(lhs,rhs,sect) nds32_allow_local_subtract (lhs, rhs, sect)
/* dwarf2dbg.c. */
#define DWARF2_USE_FIXED_ADVANCE_PC 1
/* write.c. */
extern long nds32_pcrel_from_section (struct fix *, segT);
extern bool nds32_fix_adjustable (struct fix *);
extern void nds32_frob_file (void);
extern void nds32_post_relax_hook (void);
extern void nds32_frob_file_before_fix (void);
extern void elf_nds32_final_processing (void);
extern int nds32_validate_fix_sub (struct fix *, segT);
extern int nds32_force_relocation (struct fix *);
extern void nds32_set_section_relocs (asection *, arelent ** , unsigned int);
/* Fill in rs_align_code fragments. TODO: Review this. */
extern void nds32_handle_align (fragS *);
extern int nds32_relax_frag (segT, fragS *, long);
extern int tc_nds32_regname_to_dw2regnum (char *);
extern void tc_nds32_frame_initial_instructions (void);
#define MD_PCREL_FROM_SECTION(fix, sect) nds32_pcrel_from_section (fix, sect)
#define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 0
#define tc_fix_adjustable(FIX) nds32_fix_adjustable (FIX)
#define md_apply_fix(fixP, addn, seg) nds32_apply_fix (fixP, addn, seg)
#define md_post_relax_hook nds32_post_relax_hook ()
#define tc_frob_file_before_fix() nds32_frob_file_before_fix ()
#define elf_tc_final_processing() elf_nds32_final_processing ()
/* For DIFF relocations. The default behavior is inconsistent with the
asm internal document. */
#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
(GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC) \
|| TC_FORCE_RELOCATION (FIX))
#define TC_FORCE_RELOCATION(fix) nds32_force_relocation (fix)
#define TC_VALIDATE_FIX_SUB(FIX,SEG) nds32_validate_fix_sub (FIX,SEG)
#define SET_SECTION_RELOCS(sec, relocs, n) nds32_set_section_relocs (sec, relocs, n)
/* Values passed to md_apply_fix don't include the symbol value. */
#define MD_APPLY_SYM_VALUE(FIX) 0
#define HANDLE_ALIGN(f) nds32_handle_align (f)
#undef DIFF_EXPR_OK /* They should be fixed in linker. */
#define md_relax_frag(segment, fragP, stretch) nds32_relax_frag (segment, fragP, stretch)
#define WORKING_DOT_WORD /* We don't need to handle .word strangely. */
/* Using to chain fixup with previous fixup. */
#define TC_FIX_TYPE struct fix *
#define TC_INIT_FIX_DATA(fixP) \
do \
{ \
fixP->tc_fix_data = NULL; \
} \
while (0)
/* read.c. */
/* Extend GAS macro handling capability. */
extern void nds32_macro_start (void);
extern void nds32_macro_end (void);
extern void nds32_macro_info (void *);
extern void nds32_start_line_hook (void);
extern void nds32_elf_section_change_hook (void);
extern void md_begin (void);
extern void md_end (void);
extern int nds32_start_label (int, int);
extern void nds32_cleanup (void);
extern void nds32_flush_pending_output (void);
extern void nds32_cons_align (int);
extern void nds32_check_label (symbolS *);
extern void nds32_frob_label (symbolS *);
extern void nds32_pre_do_align (int, char *, int, int);
extern void nds32_do_align (int);
#define md_macro_start() nds32_macro_start ()
#define md_macro_end() nds32_macro_end ()
#define md_macro_info(args) nds32_macro_info (args)
#define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) \
(NEXT_CHAR == ':' && nds32_start_label (0, 0))
#define tc_check_label(label) nds32_check_label (label)
#define tc_frob_label(label) nds32_frob_label (label)
#define md_end md_end
#define md_start_line_hook() nds32_start_line_hook ()
#define md_cons_align(n) nds32_cons_align (n)
/* COLE: TODO: Review md_do_align. */
#define md_do_align(N, FILL, LEN, MAX, LABEL) \
nds32_pre_do_align (N, FILL, LEN, MAX); \
if ((N) > 1 && (subseg_text_p (now_seg) \
|| startswith (now_seg->name, ".gcc_except_table"))) \
nds32_do_align (N); \
goto LABEL;
#define md_elf_section_change_hook() nds32_elf_section_change_hook ()
#define md_flush_pending_output() nds32_flush_pending_output ()
#define md_cleanup() nds32_cleanup ()
#define LOCAL_LABELS_FB 1 /* Permit temporary numeric labels. */
/* frags.c. */
enum FRAG_ATTR
{
NDS32_FRAG_RELAXABLE = 0x1,
NDS32_FRAG_RELAXED = 0x2,
NDS32_FRAG_BRANCH = 0x4,
NDS32_FRAG_LABEL = 0x8,
NDS32_FRAG_FINAL = 0x10,
NDS32_FRAG_RELAXABLE_BRANCH = 0x20,
NDS32_FRAG_ALIGN = 0x40
};
struct nds32_frag_type
{
relax_substateT flag;
struct nds32_opcode *opcode;
uint32_t insn;
/* To Save previous label fixup if existence. */
struct fix *fixup;
};
extern void nds32_frag_init (fragS *);
#define TC_FRAG_TYPE struct nds32_frag_type
#define TC_FRAG_INIT(fragP, max_bytes) nds32_frag_init (fragP)
/* CFI directive. */
extern void nds32_elf_frame_initial_instructions (void);
extern int tc_nds32_regname_to_dw2regnum (char *);
#define TARGET_USE_CFIPOP 1
#define DWARF2_DEFAULT_RETURN_COLUMN 30
#define DWARF2_CIE_DATA_ALIGNMENT -4
#define DWARF2_LINE_MIN_INSN_LENGTH 2
#define tc_regname_to_dw2regnum tc_nds32_regname_to_dw2regnum
#define tc_cfi_frame_initial_instructions tc_nds32_frame_initial_instructions
/* COLE: TODO: Review These. They seem to be obsoleted. */
#if 1
#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
((FIX)->fx_addsy == NULL \
|| (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
&& ! S_IS_WEAK ((FIX)->fx_addsy) \
&& S_IS_DEFINED ((FIX)->fx_addsy) \
&& ! S_IS_COMMON ((FIX)->fx_addsy)))
#define TC_HANDLES_FX_DONE
#endif
/* Because linker may relax the code, assemble-time expression
optimization is not allowed. */
#define md_allow_eh_opt 0
/* For nds32 relax. */
enum nds32_br_range
{
BR_RANGE_S256 = 0,
BR_RANGE_S16K,
BR_RANGE_S64K,
BR_RANGE_S16M,
BR_RANGE_U4G,
BR_RANGE_NUM
};
enum nds32_ramp
{
NDS32_CREATE_LABEL = 1,
NDS32_RELAX = (1 << 1), /* Obsolete in the future. */
NDS32_ORIGIN = (1 << 2),
NDS32_INSN16 = (1 << 3),
NDS32_PTR = (1 << 4),
NDS32_ABS = (1 << 5),
NDS32_HINT = (1 << 6),
NDS32_FIX = (1 << 7),
NDS32_ADDEND = (1 << 8),
NDS32_SYM = (1 << 9),
NDS32_PCREL = (1 << 10),
NDS32_PTR_PATTERN = (1 << 11),
NDS32_PTR_MULTIPLE = (1 << 12),
NDS32_GROUP = (1 << 13),
NDS32_SYM_DESC_MEM = (1 << 14)
};
typedef struct nds32_relax_fixup_info
{
int offset;
int size;
/* Reverse branch has to jump to the end of instruction pattern. */
int ramp;
enum bfd_reloc_code_real r_type;
} nds32_relax_fixup_info_t;
typedef struct nds32_cond_field
{
int offset;
int bitpos; /* Register position. */
int bitmask; /* Number of register bits. */
bool signed_extend;
} nds32_cond_field_t;
/* The max relaxation pattern is 20-bytes including the nop. */
#define NDS32_MAXCHAR 20
/* In current, the max extended number of instruction for one pseudo instruction
is 6, but its number of relocation may be 12. */
#define MAX_RELAX_NUM 6
#define MAX_RELAX_FIX 12
typedef struct nds32_relax_info
{
/* Opcode for the instruction. */
const char *opcode;
enum nds32_br_range br_range;
nds32_cond_field_t cond_field[MAX_RELAX_NUM]; /* TODO: Reuse nds32_field? */
/* Code sequences for different branch range. */
uint32_t relax_code_seq[BR_RANGE_NUM][MAX_RELAX_NUM];
nds32_cond_field_t relax_code_condition[BR_RANGE_NUM][MAX_RELAX_NUM];
unsigned int relax_code_size[BR_RANGE_NUM];
int relax_branch_isize[BR_RANGE_NUM];
nds32_relax_fixup_info_t relax_fixup[BR_RANGE_NUM][MAX_RELAX_FIX];
} relax_info_t;
enum nds32_relax_hint_type
{
NDS32_RELAX_HINT_NONE = 0,
NDS32_RELAX_HINT_LA_FLSI,
NDS32_RELAX_HINT_LALS,
NDS32_RELAX_HINT_LA_PLT,
NDS32_RELAX_HINT_LA_GOT,
NDS32_RELAX_HINT_LA_GOTOFF,
NDS32_RELAX_HINT_TLS_START = 0x100,
NDS32_RELAX_HINT_TLS_LE_LS,
NDS32_RELAX_HINT_TLS_IE_LS,
NDS32_RELAX_HINT_TLS_IE_LA,
NDS32_RELAX_HINT_TLS_IEGP_LA,
NDS32_RELAX_HINT_TLS_DESC_LS,
};
struct nds32_relax_hint_table
{
enum nds32_relax_hint_type main_type;
unsigned int relax_code_size;
uint32_t relax_code_seq[MAX_RELAX_NUM];
nds32_relax_fixup_info_t relax_fixup[MAX_RELAX_FIX];
};
#endif /* TC_NDS32 */
|
