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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.h"
23: #include "svr3.h"
24:
25: /* Provide a set of pre-definitions and pre-assertions appropriate for
26: the i860 running svr3. */
27: #define CPP_PREDEFINES "-Di860 -Dunix -DSVR3"
28:
29: /* Use crt1.o as a startup file and crtn.o as a closing file. */
30:
31: #define STARTFILE_SPEC \
32: "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
33:
34: #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
35:
36: /* Special flags for the linker. I don't know what they do. */
37:
38: #define LINK_SPEC "%{T*} %{z:-lm}"
39:
40: /* The prefix to be used in assembler output for all names of registers.
41: None is needed in V.3. */
42:
43: #define I860_REG_PREFIX ""
44:
45: /* Delimiter that starts comments in the assembler code. */
46:
47: #define ASM_COMMENT_START "//"
48:
49: /* Don't renumber the regusters for debugger output. */
50:
51: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
52:
53: /* Output the special word the System V SDB wants to see just before
54: the first word of each function's prologue code. */
55:
56: extern char *current_function_original_name;
57:
58: /* This special macro is used to output a magic word just before the
59: first word of each function. On some versions of UNIX running on
60: the i860, this word can be any word that looks like a NOP, however
61: under svr4, this neds to be an `shr r0,r0,r0' instruction in which
62: the normally unused low-order bits contain the length of the function
63: prologue code (in bytes). This is needed to make the System V SDB
64: debugger happy. */
65:
66: #undef ASM_OUTPUT_FUNCTION_PREFIX
67: #define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \
68: do { ASM_OUTPUT_ALIGN (FILE, 2); \
69: fprintf ((FILE), "\t.long\t.ep."); \
70: assemble_name (FILE, FNNAME); \
71: fprintf (FILE, "-"); \
72: assemble_name (FILE, FNNAME); \
73: fprintf (FILE, "+0xc8000000\n"); \
74: current_function_original_name = (FNNAME); \
75: } while (0)
76:
77: /* Output the special label that must go just after each function's
78: prologue code to support svr4 SDB. */
79:
80: #define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \
81: do { fprintf (FILE, ".ep."); \
82: assemble_name (FILE, current_function_original_name); \
83: fprintf (FILE, ":\n"); \
84: } while (0)
85:
86: /* The routine used to output string literals.
87:
88: #define ASCII_DATA_ASM_OP ".byte"
89:
90: #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
91: do \
92: { \
93: register unsigned char *str = (unsigned char *) (STR); \
94: register unsigned char *limit = str + (LENGTH); \
95: register unsigned bytes_in_chunk = 0; \
96: for (; str < limit; str++) \
97: { \
98: register unsigned ch = *str; \
99: if (ch < 32 || ch == '\\' || ch == '"' || ch >= 127) \
100: { \
101: if (bytes_in_chunk > 0) \
102: { \
103: fprintf ((FILE), "\"\n"); \
104: bytes_in_chunk = 0; \
105: } \
106: fprintf ((FILE), "%s\t%d\n", ASM_BYTE_OP, ch); \
107: } \
108: else \
109: { \
110: if (bytes_in_chunk >= 60) \
111: { \
112: fprintf ((FILE), "\"\n"); \
113: bytes_in_chunk = 0; \
114: } \
115: if (bytes_in_chunk == 0) \
116: fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
117: putc (ch, (FILE)); \
118: bytes_in_chunk++; \
119: } \
120: } \
121: if (bytes_in_chunk > 0) \
122: fprintf ((FILE), "\"\n"); \
123: } \
124: while (0)
125:
126:
127: #undef CTORS_SECTION_ASM_OP
128: #define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"x\"\n"
129: #undef DTORS_SECTION_ASM_OP
130: #define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"x\"\n"
131:
132: /* Add definitions to support the .tdesc section as specified in the svr4
133: ABI for the i860. */
134:
135: #define TDESC_SECTION_ASM_OP "\t.section\t.tdesc"
136:
137: #undef EXTRA_SECTIONS
138: #define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc
139:
140: #undef EXTRA_SECTION_FUNCTIONS
141: #define EXTRA_SECTION_FUNCTIONS \
142: CONST_SECTION_FUNCTION \
143: CTORS_SECTION_FUNCTION \
144: DTORS_SECTION_FUNCTION \
145: TDESC_SECTION_FUNCTION
146:
147: #define TDESC_SECTION_FUNCTION \
148: void \
149: tdesc_section () \
150: { \
151: if (in_section != in_tdesc) \
152: { \
153: fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \
154: in_section = in_tdesc; \
155: } \
156: }
157:
158: /* Enable the `const' section that svr3.h defines how to use. */
159: #define USE_CONST_SECTION 1
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