linux.h revision 169689 
1130803Smarcel/* Definitions for Linux for S/390.
2130803Smarcel   Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2006
3130803Smarcel   Free Software Foundation, Inc.
4   Contributed by Hartmut Penner (hpenner@de.ibm.com) and
5                  Ulrich Weigand (uweigand@de.ibm.com).
6
7This file is part of GCC.
8
9GCC is free software; you can redistribute it and/or modify it under
10the terms of the GNU General Public License as published by the Free
11Software Foundation; either version 2, or (at your option) any later
12version.
13
14GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15WARRANTY; without even the implied warranty of MERCHANTABILITY or
16FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
17for more details.
18
19You should have received a copy of the GNU General Public License
20along with GCC; see the file COPYING.  If not, write to the Free
21Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
2202110-1301, USA.  */
23
24#ifndef _LINUX_H
25#define _LINUX_H
26
27/* Target specific version string.  */
28
29#ifdef DEFAULT_TARGET_64BIT
30#undef  TARGET_VERSION
31#define TARGET_VERSION fprintf (stderr, " (Linux for zSeries)");
32#else
33#undef  TARGET_VERSION
34#define TARGET_VERSION fprintf (stderr, " (Linux for S/390)");
35#endif
36
37
38/* Target specific type definitions.  */
39
40/* ??? Do we really want long as size_t on 31-bit?  */
41#undef  SIZE_TYPE
42#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "long unsigned int")
43#undef  PTRDIFF_TYPE
44#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
45
46#undef  WCHAR_TYPE
47#define WCHAR_TYPE "int"
48#undef  WCHAR_TYPE_SIZE
49#define WCHAR_TYPE_SIZE 32
50
51
52/* Target specific preprocessor settings.  */
53
54#define TARGET_OS_CPP_BUILTINS()		\
55  do						\
56    {						\
57      LINUX_TARGET_OS_CPP_BUILTINS();		\
58    }						\
59  while (0)
60
61
62/* Target specific assembler settings.  */
63
64#undef  ASM_SPEC
65#define ASM_SPEC "%{m31&m64}%{mesa&mzarch}%{march=*}"
66
67
68/* Target specific linker settings.  */
69
70#ifdef DEFAULT_TARGET_64BIT
71#define MULTILIB_DEFAULTS { "m64" }
72#else
73#define MULTILIB_DEFAULTS { "m31" }
74#endif
75
76#define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
77#define GLIBC_DYNAMIC_LINKER64 "/lib/ld64.so.1"
78
79#undef  LINK_SPEC
80#define LINK_SPEC \
81  "%{m31:-m elf_s390}%{m64:-m elf64_s390} \
82   %{shared:-shared} \
83   %{!shared: \
84      %{static:-static} \
85      %{!static: \
86	%{rdynamic:-export-dynamic} \
87	%{!dynamic-linker: \
88          %{m31:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "} \
89          %{m64:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}}}}"
90
91#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
92
93#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
94
95#define MD_UNWIND_SUPPORT "config/s390/linux-unwind.h"
96
97#ifdef TARGET_LIBC_PROVIDES_SSP
98/* s390 glibc provides __stack_chk_guard in 0x14(tp),
99   s390x glibc provides it at 0x28(tp).  */
100#define TARGET_THREAD_SSP_OFFSET        (TARGET_64BIT ? 0x28 : 0x14)
101#endif
102
103/* Define if long doubles should be mangled as 'g'.  */
104#define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
105
106#endif
107