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
|
/* Target definitions for GNU compiler for Intel 80860 running System V.3
Copyright (C) 1991 Free Software Foundation, Inc.
Written by Ron Guilmette (rfg@netcom.com).
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. */
#include "i860/i860.h"
#include "svr3.h"
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (i860, System V Release 3)")
/* Provide a set of pre-definitions and pre-assertions appropriate for
the i860 running svr3. */
#define CPP_PREDEFINES "-Di860 -Dunix -D__svr3__ -Asystem(unix) -Asystem(svr3) -Acpu(i860) -Amachine(i860)"
/* Use crt1.o as a startup file and crtn.o as a closing file. */
#define STARTFILE_SPEC \
"%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
#define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
/* Special flags for the linker. I don't know what they do. */
#define LINK_SPEC "%{T*} %{z:-lm}"
/* The prefix to be used in assembler output for all names of registers.
None is needed in V.3. */
#define I860_REG_PREFIX ""
/* Delimiter that starts comments in the assembler code. */
#define ASM_COMMENT_START "//"
/* Don't renumber the regusters for debugger output. */
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
/* Output the special word the System V SDB wants to see just before
the first word of each function's prologue code. */
extern char *current_function_original_name;
/* This special macro is used to output a magic word just before the
first word of each function. On some versions of UNIX running on
the i860, this word can be any word that looks like a NOP, however
under svr4, this neds to be an `shr r0,r0,r0' instruction in which
the normally unused low-order bits contain the length of the function
prologue code (in bytes). This is needed to make the System V SDB
debugger happy. */
#undef ASM_OUTPUT_FUNCTION_PREFIX
#define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \
do { ASM_OUTPUT_ALIGN (FILE, 2); \
fprintf ((FILE), "\t.long\t.ep."); \
assemble_name (FILE, FNNAME); \
fprintf (FILE, "-"); \
assemble_name (FILE, FNNAME); \
fprintf (FILE, "+0xc8000000\n"); \
current_function_original_name = (FNNAME); \
} while (0)
/* Output the special label that must go just after each function's
prologue code to support svr4 SDB. */
#define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \
do { fprintf (FILE, ".ep."); \
assemble_name (FILE, current_function_original_name); \
fprintf (FILE, ":\n"); \
} while (0)
/* This says how to output an assembler line
to define a local common symbol.
The difference from svr3.h is we don't limit align to 2. */
#undef ASM_OUTPUT_LOCAL
#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
do { \
int align = exact_log2 (ROUNDED); \
data_section (); \
ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
ASM_OUTPUT_LABEL ((FILE), (NAME)); \
fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \
} while (0)
/* The routine used to output string literals.
#define ASCII_DATA_ASM_OP ".byte"
#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
do \
{ \
register unsigned char *str = (unsigned char *) (STR); \
register unsigned char *limit = str + (LENGTH); \
register unsigned bytes_in_chunk = 0; \
for (; str < limit; str++) \
{ \
register unsigned ch = *str; \
if (ch < 32 || ch == '\\' || ch == '"' || ch >= 127) \
{ \
if (bytes_in_chunk > 0) \
{ \
fprintf ((FILE), "\"\n"); \
bytes_in_chunk = 0; \
} \
fprintf ((FILE), "\t%s\t%d\n", ASM_BYTE_OP, ch); \
} \
else \
{ \
if (bytes_in_chunk >= 60) \
{ \
fprintf ((FILE), "\"\n"); \
bytes_in_chunk = 0; \
} \
if (bytes_in_chunk == 0) \
fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
putc (ch, (FILE)); \
bytes_in_chunk++; \
} \
} \
if (bytes_in_chunk > 0) \
fprintf ((FILE), "\"\n"); \
} \
while (0)
#undef CTORS_SECTION_ASM_OP
#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"x\""
#undef DTORS_SECTION_ASM_OP
#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"x\""
/* Add definitions to support the .tdesc section as specified in the svr4
ABI for the i860. */
#define TDESC_SECTION_ASM_OP ".section\t.tdesc"
#undef EXTRA_SECTIONS
#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc
#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS \
CONST_SECTION_FUNCTION \
CTORS_SECTION_FUNCTION \
DTORS_SECTION_FUNCTION \
TDESC_SECTION_FUNCTION
#define TDESC_SECTION_FUNCTION \
void \
tdesc_section () \
{ \
if (in_section != in_tdesc) \
{ \
fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \
in_section = in_tdesc; \
} \
}
/* Enable the `const' section that svr3.h defines how to use. */
#undef USE_CONST_SECTION
#define USE_CONST_SECTION 1
|
