openbsd.h revision 102780 
1/* Configuration for an OpenBSD i386 target.
2   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
3
4This file is part of GNU CC.
5
6GNU CC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10
11GNU CC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU CC; see the file COPYING.  If not, write to
18the Free Software Foundation, 59 Temple Place - Suite 330,
19Boston, MA 02111-1307, USA.  */
20
21/* This is tested by i386gas.h.  */
22#define YES_UNDERSCORES
23
24#include <i386/gstabs.h>
25
26/* Get generic OpenBSD definitions.  */
27#define OBSD_OLD_GAS
28#include <openbsd.h>
29
30/* This goes away when the math-emulator is fixed */
31#undef TARGET_SUBTARGET_DEFAULT
32#define TARGET_SUBTARGET_DEFAULT \
33  (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
34
35/* Run-time target specifications */
36#define CPP_PREDEFINES "-D__unix__ -D__OpenBSD__ \
37 -Asystem=unix -Asystem=bsd -Asystem=OpenBSD"
38
39/* Layout of source language data types.  */
40
41/* This must agree with <machine/ansi.h> */
42#undef SIZE_TYPE
43#define SIZE_TYPE "unsigned int"
44
45#undef PTRDIFF_TYPE
46#define PTRDIFF_TYPE "int"
47
48#undef WCHAR_TYPE
49#define WCHAR_TYPE "int"
50
51#undef WCHAR_TYPE_SIZE
52#define WCHAR_TYPE_SIZE 32
53
54/* Assembler format: overall framework.  */
55
56#undef ASM_APP_ON
57#define ASM_APP_ON "#APP\n"
58
59#undef ASM_APP_OFF
60#define ASM_APP_OFF "#NO_APP\n"
61
62/* Stack & calling: aggregate returns.  */
63
64/* Don't default to pcc-struct-return, because gcc is the only compiler, and
65   we want to retain compatibility with older gcc versions.  */
66#define DEFAULT_PCC_STRUCT_RETURN 0
67
68/* Assembler format: alignment output.  */
69
70/* Kludgy test: when gas is upgraded, it will have p2align, and no problems
71   with nops.  */
72#ifndef HAVE_GAS_MAX_SKIP_P2ALIGN
73/* i386 OpenBSD still uses an older gas that doesn't insert nops by default
74   when the .align directive demands to insert extra space in the text
75   segment.  */
76#undef ASM_OUTPUT_ALIGN
77#define ASM_OUTPUT_ALIGN(FILE,LOG) \
78  if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG))
79#endif
80
81/* Stack & calling: profiling.  */
82
83/* OpenBSD's profiler recovers all information from the stack pointer.
84   The icky part is not here, but in machine/profile.h.  */
85#undef FUNCTION_PROFILER
86#define FUNCTION_PROFILER(FILE, LABELNO)  \
87  fputs (flag_pic ? "\tcall mcount@PLT\n": "\tcall mcount\n", FILE);
88
89/* Assembler format: exception region output.  */
90
91/* All configurations that don't use elf must be explicit about not using
92   dwarf unwind information. egcs doesn't try too hard to check internal
93   configuration files...  */
94#define DWARF2_UNWIND_INFO 0
95
96#undef ASM_PREFERRED_EH_DATA_FORMAT
97
98
99/* Note that we pick up ASM_OUTPUT_MI_THUNK from unix.h.  */
100
101#undef ASM_COMMENT_START
102#define ASM_COMMENT_START ";#"
103
104/* OpenBSD gas currently does not support quad, so do not use it.  */
105#undef ASM_QUAD
106