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
|
/* tc-xtensa.h -- Header file for tc-xtensa.c.
Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
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 2, 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, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef TC_XTENSA
#define TC_XTENSA 1
#ifdef ANSI_PROTOTYPES
struct fix;
#endif
#ifndef BFD_ASSEMBLER
#error Xtensa support requires BFD_ASSEMBLER
#endif
#ifndef OBJ_ELF
#error Xtensa support requires ELF object format
#endif
#include "xtensa-config.h"
#define TARGET_BYTES_BIG_ENDIAN XCHAL_HAVE_BE
struct xtensa_frag_type
{
unsigned is_literal:1;
unsigned is_text:1;
unsigned is_loop_target:1;
unsigned is_branch_target:1;
unsigned is_insn:1;
/* Info about the current state of assembly, i.e., density, relax,
generics, freeregs, longcalls. These need to be passed to the
backend and then to the linking file. */
unsigned is_no_density:1;
unsigned is_relax:1;
unsigned is_generics:1;
unsigned is_longcalls:1;
/* For text fragments that can generate literals at relax time, this
variable points to the frag where the literal will be stored. For
literal frags, this variable points to the nearest literal pool
location frag. This literal frag will be moved to after this
location. */
fragS *literal_frag;
/* The destination segment for literal frags. (Note that this is only
valid after xtensa_move_literals. */
segT lit_seg;
/* For the relaxation scheme, some literal fragments can have their
expansions modified by an instruction that relaxes. */
unsigned text_expansion;
unsigned literal_expansion;
unsigned unreported_expansion;
};
typedef struct xtensa_block_info_struct
{
segT sec;
bfd_vma offset;
size_t size;
struct xtensa_block_info_struct *next;
} xtensa_block_info;
typedef enum
{
xt_insn_sec,
xt_literal_sec,
max_xt_sec
} xt_section_type;
typedef struct xtensa_segment_info_struct
{
fragS *literal_pool_loc;
xtensa_block_info *blocks[max_xt_sec];
} xtensa_segment_info;
typedef struct xtensa_symfield_type_struct
{
unsigned int plt : 1;
unsigned int is_loop_target : 1;
unsigned int is_branch_target : 1;
} xtensa_symfield_type;
/* Section renaming is only supported in Tensilica's version of GAS. */
#define XTENSA_SECTION_RENAME 1
#ifdef XTENSA_SECTION_RENAME
extern const char *xtensa_section_rename
PARAMS ((const char *));
#else
/* Tensilica's section renaming feature is not included here. */
#define xtensa_section_rename(name) (name)
#endif /* XTENSA_SECTION_RENAME */
extern const char *xtensa_target_format
PARAMS ((void));
extern void xtensa_frag_init
PARAMS ((fragS *));
extern void xtensa_cons_fix_new
PARAMS ((fragS *, int, int, expressionS *));
extern void xtensa_frob_label
PARAMS ((struct symbol *));
extern void xtensa_end
PARAMS ((void));
extern void xtensa_post_relax_hook
PARAMS ((void));
extern void xtensa_file_arch_init
PARAMS ((bfd *));
extern void xtensa_flush_pending_output
PARAMS ((void));
extern bfd_boolean xtensa_fix_adjustable
PARAMS ((struct fix *));
extern void xtensa_symbol_new_hook
PARAMS ((symbolS *));
extern long xtensa_relax_frag
PARAMS ((fragS *, long, int *));
#define TARGET_FORMAT xtensa_target_format ()
#define TARGET_ARCH bfd_arch_xtensa
#define TC_SEGMENT_INFO_TYPE xtensa_segment_info
#define TC_SYMFIELD_TYPE xtensa_symfield_type
#define TC_FRAG_TYPE struct xtensa_frag_type
#define TC_FRAG_INIT(frag) xtensa_frag_init (frag)
#define TC_CONS_FIX_NEW xtensa_cons_fix_new
#define tc_canonicalize_symbol_name(s) xtensa_section_rename (s)
#define tc_init_after_args() xtensa_file_arch_init (stdoutput)
#define tc_fix_adjustable(fix) xtensa_fix_adjustable (fix)
#define tc_frob_label(sym) xtensa_frob_label (sym)
#define tc_symbol_new_hook(s) xtensa_symbol_new_hook (s)
#define md_elf_section_rename(name) xtensa_section_rename (name)
#define md_end xtensa_end
#define md_flush_pending_output() xtensa_flush_pending_output ()
#define md_operand(x)
#define TEXT_SECTION_NAME xtensa_section_rename (".text")
#define DATA_SECTION_NAME xtensa_section_rename (".data")
#define BSS_SECTION_NAME xtensa_section_rename (".bss")
/* The renumber_section function must be mapped over all the sections
after calling xtensa_post_relax_hook. That function is static in
write.c so it cannot be called from xtensa_post_relax_hook itself. */
#define md_post_relax_hook \
do \
{ \
int i = 0; \
xtensa_post_relax_hook (); \
bfd_map_over_sections (stdoutput, renumber_sections, &i); \
} \
while (0)
/* Because xtensa relaxation can insert a new literal into the middle of
fragment and thus require re-running the relaxation pass on the
section, we need an explicit flag here. We explicitly use the name
"stretched" here to avoid changing the source code in write.c. */
#define md_relax_frag(segment, fragP, stretch) \
xtensa_relax_frag (fragP, stretch, &stretched)
#define LOCAL_LABELS_FB 1
#define WORKING_DOT_WORD 1
#define DOUBLESLASH_LINE_COMMENTS
#define TC_HANDLES_FX_DONE
#define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 0
#define MD_APPLY_SYM_VALUE(FIX) 0
#endif /* TC_XTENSA */
|
