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1.1 root 1: /* Target definitions for GNU compiler for Intel 80860 running System V.3
2: Copyright (C) 1991 Free Software Foundation, Inc.
3:
4: Written by Ron Guilmette ([email protected]).
5:
6: This file is part of GNU CC.
7:
8: GNU CC is free software; you can redistribute it and/or modify
9: it under the terms of the GNU General Public License as published by
10: the Free Software Foundation; either version 2, or (at your option)
11: any later version.
12:
13: GNU CC is distributed in the hope that it will be useful,
14: but WITHOUT ANY WARRANTY; without even the implied warranty of
15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: GNU General Public License for more details.
17:
18: You should have received a copy of the GNU General Public License
19: along with GNU CC; see the file COPYING. If not, write to
20: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21:
22: #include "i860/i860.h"
23: #include "svr3.h"
24:
25: #undef TARGET_VERSION
26: #define TARGET_VERSION fprintf (stderr, " (i860, System V Release 3)")
27:
28: /* Provide a set of pre-definitions and pre-assertions appropriate for
29: the i860 running svr3. */
30: #define CPP_PREDEFINES "-Di860 -Dunix -D__svr3__ -Asystem(unix) -Asystem(svr3) -Acpu(i860) -Amachine(i860)"
31:
32: /* Use crt1.o as a startup file and crtn.o as a closing file. */
33:
34: #define STARTFILE_SPEC \
35: "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
36:
37: #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
38:
39: /* Special flags for the linker. I don't know what they do. */
40:
41: #define LINK_SPEC "%{T*} %{z:-lm}"
42:
43: /* The prefix to be used in assembler output for all names of registers.
44: None is needed in V.3. */
45:
46: #define I860_REG_PREFIX ""
47:
48: /* Delimiter that starts comments in the assembler code. */
49:
50: #define ASM_COMMENT_START "//"
51:
52: /* Don't renumber the regusters for debugger output. */
53:
54: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
55:
56: /* Output the special word the System V SDB wants to see just before
57: the first word of each function's prologue code. */
58:
59: extern char *current_function_original_name;
60:
61: /* This special macro is used to output a magic word just before the
62: first word of each function. On some versions of UNIX running on
63: the i860, this word can be any word that looks like a NOP, however
64: under svr4, this neds to be an `shr r0,r0,r0' instruction in which
65: the normally unused low-order bits contain the length of the function
66: prologue code (in bytes). This is needed to make the System V SDB
67: debugger happy. */
68:
69: #undef ASM_OUTPUT_FUNCTION_PREFIX
70: #define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \
71: do { ASM_OUTPUT_ALIGN (FILE, 2); \
72: fprintf ((FILE), "\t.long\t.ep."); \
73: assemble_name (FILE, FNNAME); \
74: fprintf (FILE, "-"); \
75: assemble_name (FILE, FNNAME); \
76: fprintf (FILE, "+0xc8000000\n"); \
77: current_function_original_name = (FNNAME); \
78: } while (0)
79:
80: /* Output the special label that must go just after each function's
81: prologue code to support svr4 SDB. */
82:
83: #define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \
84: do { fprintf (FILE, ".ep."); \
85: assemble_name (FILE, current_function_original_name); \
86: fprintf (FILE, ":\n"); \
87: } while (0)
88:
89: /* This says how to output an assembler line
90: to define a local common symbol.
91: The difference from svr3.h is we don't limit align to 2. */
92:
93: #undef ASM_OUTPUT_LOCAL
94: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
95: do { \
96: int align = exact_log2 (ROUNDED); \
97: data_section (); \
98: ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
99: ASM_OUTPUT_LABEL ((FILE), (NAME)); \
100: fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \
101: } while (0)
102:
103: /* The routine used to output string literals.
104:
105: #define ASCII_DATA_ASM_OP ".byte"
106:
107: #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
108: do \
109: { \
110: register unsigned char *str = (unsigned char *) (STR); \
111: register unsigned char *limit = str + (LENGTH); \
112: register unsigned bytes_in_chunk = 0; \
113: for (; str < limit; str++) \
114: { \
115: register unsigned ch = *str; \
116: if (ch < 32 || ch == '\\' || ch == '"' || ch >= 127) \
117: { \
118: if (bytes_in_chunk > 0) \
119: { \
120: fprintf ((FILE), "\"\n"); \
121: bytes_in_chunk = 0; \
122: } \
123: fprintf ((FILE), "\t%s\t%d\n", ASM_BYTE_OP, ch); \
124: } \
125: else \
126: { \
127: if (bytes_in_chunk >= 60) \
128: { \
129: fprintf ((FILE), "\"\n"); \
130: bytes_in_chunk = 0; \
131: } \
132: if (bytes_in_chunk == 0) \
133: fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
134: putc (ch, (FILE)); \
135: bytes_in_chunk++; \
136: } \
137: } \
138: if (bytes_in_chunk > 0) \
139: fprintf ((FILE), "\"\n"); \
140: } \
141: while (0)
142:
143:
144: #undef CTORS_SECTION_ASM_OP
145: #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"x\""
146: #undef DTORS_SECTION_ASM_OP
147: #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"x\""
148:
149: /* Add definitions to support the .tdesc section as specified in the svr4
150: ABI for the i860. */
151:
152: #define TDESC_SECTION_ASM_OP ".section\t.tdesc"
153:
154: #undef EXTRA_SECTIONS
155: #define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc
156:
157: #undef EXTRA_SECTION_FUNCTIONS
158: #define EXTRA_SECTION_FUNCTIONS \
159: CONST_SECTION_FUNCTION \
160: CTORS_SECTION_FUNCTION \
161: DTORS_SECTION_FUNCTION \
162: TDESC_SECTION_FUNCTION
163:
164: #define TDESC_SECTION_FUNCTION \
165: void \
166: tdesc_section () \
167: { \
168: if (in_section != in_tdesc) \
169: { \
170: fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \
171: in_section = in_tdesc; \
172: } \
173: }
174:
175: /* Enable the `const' section that svr3.h defines how to use. */
176: #undef USE_CONST_SECTION
177: #define USE_CONST_SECTION 1
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