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1.1 root 1: /* Definitions for Intel 386 running system V with gnu tools
2: Except that that really seems to use i386gas.h. So it's
3: not clear what, if anything, this file is good for.
4: Copyright (C) 1988 Free Software Foundation, Inc.
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:
23: #include "i386.h"
24: /* Use the bsd assembler syntax. */
25: /* we need to do this because gas is really a bsd style assembler,
26: * and so doesn't work well this these att-isms:
27: *
28: * ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
29: * ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
30: * used to define bss static space
31: *
32: * Next is the question of whether to uses underscores. RMS didn't
33: * like this idea at first, but since it is now obvious that we
34: * need this separate tm file for use with gas, at least to get
35: * dbx debugging info. */
36:
37: #include "bsd386.h"
38:
39: /* these come from bsd386.h, but are specific to sequent */
40: #undef DBX_NO_XREFS
41: #undef DBX_CONTIN_LENGTH
42:
43: /* By default, target has a 80387. */
44:
45: #define TARGET_DEFAULT 1
46:
47: #if 0 /* These aren't right for GNU ld. */
48: /* Use crt1.o as a startup file and crtn.o as a closing file. */
49:
50: #define STARTFILE_SPEC \
51: "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
52:
53: #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
54: #endif
55:
56: /* Specify predefined symbols in preprocessor. */
57:
58: #define CPP_PREDEFINES "-Dunix -Di386"
59:
60: /* Allow #sccs in preprocessor. */
61:
62: #define SCCS_DIRECTIVE
63:
64: /* Output #ident as a .ident. */
65:
66: #define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
67:
68: /* We do not want to output SDB debugging information. */
69:
70: #undef SDB_DEBUGGING_INFO
71:
72: /* We want to output DBX debugging information. */
73:
74: #define DBX_DEBUGGING_INFO
75:
76: /* Implicit library calls should use memcpy, not bcopy, etc. */
77:
78: #define TARGET_MEM_FUNCTIONS
79:
80: /* Writing `int' for a bitfield forces int alignment for the structure. */
81:
82: #define PCC_BITFIELD_TYPE_MATTERS 1
83:
84: #undef ASM_FILE_START
85: #define ASM_FILE_START(FILE) \
86: fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name);
87:
88: /* This is how to output a reference to a user-level label named NAME. */
89: #undef ASM_OUTPUT_LABELREF
90: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
91: fprintf (FILE, "_%s", NAME)
92:
93: #if 0 /* People say gas uses the log as the arg to .align. */
94: /* When using gas, .align N aligns to an N-byte boundary. */
95:
96: #undef ASM_OUTPUT_ALIGN
97: #define ASM_OUTPUT_ALIGN(FILE,LOG) \
98: if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
99: #endif
100:
101: /* Align labels, etc. at 4-byte boundaries. */
102:
103: #undef ASM_OUTPUT_ALIGN_CODE
104: #define ASM_OUTPUT_ALIGN_CODE(FILE) \
105: fprintf ((FILE), "\t.align 2,0x90\n"); /* Use log of 4 as arg. */
106:
107: /* Machines that use the AT&T assembler syntax
108: also return floating point values in an FP register. */
109: /* Define how to find the value returned by a function.
110: VALTYPE is the data type of the value (as a tree).
111: If the precise function being called is known, FUNC is its FUNCTION_DECL;
112: otherwise, FUNC is 0. */
113:
114: #define VALUE_REGNO(MODE) \
115: (((MODE)==SFmode || (MODE)==DFmode) ? FIRST_FLOAT_REG : 0)
116:
117: /* 1 if N is a possible register number for a function value. */
118:
119: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG)
120:
121: #if 0 /* This symbol is expected to exist only on BSD,
122: and besides, it describes the host rather than the target.
123: It certainly does not belong here. */
124: #ifndef MAXPATHLEN
125: #define MAXPATHLEN 1024
126: #endif
127: #endif
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