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
|
/* Definitions of target machine for GNU compiler. MIPS R3000 version with
GOFAST floating point library.
Copyright (C) 1994, 1997 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC 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.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Use ELF. */
#define OBJECT_FORMAT_ELF
/* Until we figure out what MIPS ELF targets normally use, just do
stabs in ELF. */
#ifndef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
#endif
/* Mostly like ECOFF. */
#include "gofast.h"
#include "mips/ecoff.h"
/* We need to use .esize and .etype instead of .size and .type to
avoid conflicting with ELF directives. */
#undef PUT_SDB_SIZE
#define PUT_SDB_SIZE(a) \
do { \
extern FILE *asm_out_text_file; \
fprintf (asm_out_text_file, "\t.esize\t%d;", (a)); \
} while (0)
#undef PUT_SDB_TYPE
#define PUT_SDB_TYPE(a) \
do { \
extern FILE *asm_out_text_file; \
fprintf (asm_out_text_file, "\t.etype\t0x%x;", (a)); \
} while (0)
/* Biggest alignment supported by the object file format of this
machine. Use this macro to limit the alignment which can be
specified using the `__attribute__ ((aligned (N)))' construct. If
not defined, the default value is `BIGGEST_ALIGNMENT'. */
#define MAX_OFILE_ALIGNMENT (32768*8)
/* A C statement to output something to the assembler file to switch to section
NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
NULL_TREE. Some target formats do not support arbitrary sections. Do not
define this macro in such cases. */
#define ASM_OUTPUT_SECTION_NAME(F, DECL, NAME, RELOC) \
do { \
extern FILE *asm_out_text_file; \
if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \
fprintf (asm_out_text_file, "\t.section %s,\"ax\",@progbits\n", (NAME)); \
else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \
fprintf (F, "\t.section %s,\"a\",@progbits\n", (NAME)); \
else \
fprintf (F, "\t.section %s,\"aw\",@progbits\n", (NAME)); \
} while (0)
/* The following macro defines the format used to output the second
operand of the .type assembler directive. Different svr4 assemblers
expect various different forms for this operand. The one given here
is just a default. You may need to override it in your machine-
specific tm.h file (depending upon the particulars of your assembler). */
#define TYPE_OPERAND_FMT "@%s"
/* Define the strings used for the special svr4 .type and .size directives.
These strings generally do not vary from one system running svr4 to
another, but if a given system (e.g. m88k running svr) needs to use
different pseudo-op names for these, they may be overridden in the
file which includes this one. */
#undef TYPE_ASM_OP
#undef SIZE_ASM_OP
#define TYPE_ASM_OP ".type"
#define SIZE_ASM_OP ".size"
/* These macros generate the special .type and .size directives which
are used to set the corresponding fields of the linker symbol table
entries in an ELF object file under SVR4. These macros also output
the starting labels for the relevant functions/objects. */
/* Write the extra assembler code needed to declare an object properly. */
#undef ASM_DECLARE_OBJECT_NAME
#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
do { \
fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
assemble_name (FILE, NAME); \
putc (',', FILE); \
fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
putc ('\n', FILE); \
size_directive_output = 0; \
if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
{ \
size_directive_output = 1; \
fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
assemble_name (FILE, NAME); \
fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
} \
mips_declare_object (FILE, NAME, "", ":\n", 0); \
} while (0)
/* Output the size directive for a decl in rest_of_decl_compilation
in the case where we did not do so before the initializer.
Once we find the error_mark_node, we know that the value of
size_directive_output was set
by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
#undef ASM_FINISH_DECLARE_OBJECT
#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
do { \
char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
&& ! AT_END && TOP_LEVEL \
&& DECL_INITIAL (DECL) == error_mark_node \
&& !size_directive_output) \
{ \
size_directive_output = 1; \
fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
assemble_name (FILE, name); \
fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
} \
} while (0)
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
do { fputc ( '\t', FILE); \
assemble_name (FILE, LABEL1); \
fputs ( " = ", FILE); \
assemble_name (FILE, LABEL2); \
fputc ( '\n', FILE); \
} while (0)
/* Note about .weak vs. .weakext
The mips native assemblers support .weakext, but not .weak.
mips-elf gas supports .weak, but not .weakext.
mips-elf gas has been changed to support both .weak and .weakext,
but until that support is generally available, the 'if' below
should serve. */
#define ASM_WEAKEN_LABEL(FILE,NAME) ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,0)
#define ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,VALUE) \
do { \
if (TARGET_GAS) \
fputs ("\t.weak\t", FILE); \
else \
fputs ("\t.weakext\t", FILE); \
assemble_name (FILE, NAME); \
if (VALUE) \
{ \
fputc (' ', FILE); \
assemble_name (FILE, VALUE); \
} \
fputc ('\n', FILE); \
} while (0)
#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
#define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
#define UNIQUE_SECTION(DECL,RELOC) \
do { \
int len, size, sec; \
char *name, *string, *prefix; \
static char *prefixes[4][2] = { \
{ ".text.", ".gnu.linkonce.t." }, \
{ ".rodata.", ".gnu.linkonce.r." }, \
{ ".data.", ".gnu.linkonce.d." }, \
{ ".sdata.", ".gnu.linkonce.s." } \
}; \
\
name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
size = int_size_in_bytes (TREE_TYPE (decl)); \
\
/* Determine the base section we are interested in: \
0=text, 1=rodata, 2=data, 3=sdata. */ \
if (TREE_CODE (DECL) == FUNCTION_DECL) \
sec = 0; \
else if ((TARGET_EMBEDDED_PIC || TARGET_MIPS16) \
&& TREE_CODE (decl) == STRING_CST \
&& !flag_writable_strings) \
{ \
/* For embedded position independent code, put constant strings \
in the text section, because the data section is limited to \
64K in size. For mips16 code, put strings in the text \
section so that a PC relative load instruction can be used to \
get their address. */ \
sec = 0; \
} \
else if (TARGET_EMBEDDED_DATA) \
{ \
/* For embedded applications, always put an object in read-only data \
if possible, in order to reduce RAM usage. */ \
\
if (DECL_READONLY_SECTION (DECL, RELOC)) \
sec = 1; \
else if (size > 0 && size <= mips_section_threshold) \
sec = 3; \
else \
sec = 2; \
} \
else \
{ \
/* For hosted applications, always put an object in small data if \
possible, as this gives the best performance. */ \
\
if (size > 0 && size <= mips_section_threshold) \
sec = 3; \
else if (DECL_READONLY_SECTION (DECL, RELOC)) \
sec = 1; \
else \
sec = 2; \
} \
\
prefix = prefixes[sec][DECL_ONE_ONLY (DECL)]; \
len = strlen (name) + strlen (prefix); \
string = alloca (len + 1); \
sprintf (string, "%s%s", prefix, name); \
\
DECL_SECTION_NAME (DECL) = build_string (len, string); \
} while (0)
|
