[uClibc-cvs] svn commit: branches/uClibc-nptl/libpthread/nptl: compat sysdeps/unix/sysv/linux
sjhill at uclibc.org
sjhill at uclibc.org
Fri Jun 3 02:32:56 UTC 2005
Author: sjhill
Date: 2005-06-02 20:32:55 -0600 (Thu, 02 Jun 2005)
New Revision: 10456
Log:
Add in compiling compatibility header files and header file for
obtaining the Linux kernel version headers being used for NPTL.
Added:
branches/uClibc-nptl/libpthread/nptl/compat/
branches/uClibc-nptl/libpthread/nptl/compat/dl-sysdep.h
branches/uClibc-nptl/libpthread/nptl/compat/libc-internal.h
branches/uClibc-nptl/libpthread/nptl/compat/libc-symbols.h
branches/uClibc-nptl/libpthread/nptl/compat/shlib-compat.h
branches/uClibc-nptl/libpthread/nptl/sysdeps/unix/sysv/linux/hp-timing.h
branches/uClibc-nptl/libpthread/nptl/sysdeps/unix/sysv/linux/kernel-features.h
Changeset:
Added: branches/uClibc-nptl/libpthread/nptl/compat/dl-sysdep.h
===================================================================
--- branches/uClibc-nptl/libpthread/nptl/compat/dl-sysdep.h 2005-06-03 02:18:43 UTC (rev 10455)
+++ branches/uClibc-nptl/libpthread/nptl/compat/dl-sysdep.h 2005-06-03 02:32:55 UTC (rev 10456)
@@ -0,0 +1,35 @@
+/* System-specific settings for dynamic linker code. Generic version.
+ Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* No multiple inclusion protection need here because it's just macros.
+ We don't want to use _DL_SYSDEP_H in case we are #include_next'd. */
+
+/* This macro must be defined to either 0 or 1.
+
+ If 1, then an errno global variable hidden in ld.so will work right with
+ all the errno-using libc code compiled for ld.so, and there is never a
+ need to share the errno location with libc. This is appropriate only if
+ all the libc functions that ld.so uses are called without PLT and always
+ get the versions linked into ld.so rather than the libc ones. */
+
+#ifdef IS_IN_rtld
+# define RTLD_PRIVATE_ERRNO 1
+#else
+# define RTLD_PRIVATE_ERRNO 0
+#endif
Added: branches/uClibc-nptl/libpthread/nptl/compat/libc-internal.h
===================================================================
--- branches/uClibc-nptl/libpthread/nptl/compat/libc-internal.h 2005-06-03 02:18:43 UTC (rev 10455)
+++ branches/uClibc-nptl/libpthread/nptl/compat/libc-internal.h 2005-06-03 02:32:55 UTC (rev 10456)
@@ -0,0 +1,37 @@
+/* This file contains a number of internal prototype declarations that
+ don't fit anywhere else. */
+
+#ifndef _LIBC_INTERNAL
+# define _LIBC_INTERNAL 1
+
+#include <hp-timing.h>
+
+/* Initialize the `__libc_enable_secure' flag. */
+extern void __libc_init_secure (void);
+
+/* This function will be called from _init in init-first.c. */
+extern void __libc_global_ctors (void);
+
+/* Discover the tick frequency of the machine if something goes wrong,
+ we return 0, an impossible hertz. */
+extern int __profile_frequency (void);
+libc_hidden_proto (__profile_frequency)
+
+/* Hooks for the instrumenting functions. */
+extern void __cyg_profile_func_enter (void *this_fn, void *call_site);
+extern void __cyg_profile_func_exit (void *this_fn, void *call_site);
+
+/* Get frequency of the system processor. */
+extern hp_timing_t __get_clockfreq (void);
+
+/* Free all allocated resources. */
+extern void __libc_freeres (void);
+libc_hidden_proto (__libc_freeres)
+
+/* Free resources stored in thread-local variables on thread exit. */
+extern void __libc_thread_freeres (void);
+
+/* Define and initialize `__progname' et. al. */
+extern void __init_misc (int, char **, char **);
+
+#endif /* _LIBC_INTERNAL */
Added: branches/uClibc-nptl/libpthread/nptl/compat/libc-symbols.h
===================================================================
--- branches/uClibc-nptl/libpthread/nptl/compat/libc-symbols.h 2005-06-03 02:18:43 UTC (rev 10455)
+++ branches/uClibc-nptl/libpthread/nptl/compat/libc-symbols.h 2005-06-03 02:32:55 UTC (rev 10456)
@@ -0,0 +1,154 @@
+#ifndef _LIBC_SYMBOLS_H
+#define _LIBC_SYMBOLS_H 1
+
+/*
+ * NPTL - These definitions were taken from 'include/libc-symbols.h'
+ * in glibc. We are going to use the empty macros for now
+ * until we run into other compile errors that force us to
+ * do otherwise.
+ */
+#if 0
+# ifndef __ASSEMBLER__
+# if !defined HAVE_VISIBILITY_ATTRIBUTE \
+ || defined HAVE_BROKEN_VISIBILITY_ATTRIBUTE
+# define __hidden_proto_hiddenattr(attrs...)
+# else
+# define __hidden_proto_hiddenattr(attrs...) \
+ __attribute__ ((visibility ("hidden"), ##attrs))
+# endif
+# define hidden_proto(name, attrs...) \
+ __hidden_proto (name, __GI_##name, ##attrs)
+# define __hidden_proto(name, internal, attrs...) \
+ extern __typeof (name) name __asm__ (__hidden_asmname (#internal)) \
+ __hidden_proto_hiddenattr (attrs);
+# define __hidden_asmname(name) \
+ __hidden_asmname1 (__USER_LABEL_PREFIX__, name)
+# define __hidden_asmname1(prefix, name) __hidden_asmname2(prefix, name)
+# define __hidden_asmname2(prefix, name) #prefix name
+# define __hidden_ver1(local, internal, name) \
+ extern __typeof (name) __EI_##name __asm__(__hidden_asmname (#internal)); \
+ extern __typeof (name) __EI_##name \
+ __attribute__((alias (__hidden_asmname (#local))))
+# define hidden_ver(local, name) __hidden_ver1(local, __GI_##name, name);
+# define hidden_data_ver(local, name) hidden_ver(local, name)
+# define hidden_def(name) __hidden_ver1(__GI_##name, name, name);
+# define hidden_data_def(name) hidden_def(name)
+# define hidden_weak(name) \
+ __hidden_ver1(__GI_##name, name, name) __attribute__((weak));
+# define hidden_data_weak(name) hidden_weak(name)
+# else
+/* For assembly, we need to do the opposite of what we do in C:
+ in assembly gcc __REDIRECT stuff is not in place, so functions
+ are defined by its normal name and we need to create the
+ __GI_* alias to it, in C __REDIRECT causes the function definition
+ to use __GI_* name and we need to add alias to the real name.
+ There is no reason to use hidden_weak over hidden_def in assembly,
+ but we provide it for consistency with the C usage.
+ hidden_proto doesn't make sense for assembly but the equivalent
+ is to call via the HIDDEN_JUMPTARGET macro instead of JUMPTARGET. */
+# define hidden_def(name) strong_alias (name, __GI_##name)
+# define hidden_weak(name) hidden_def (name)
+# define hidden_ver(local, name) strong_alias (local, __GI_##name)
+# define hidden_data_def(name) strong_data_alias (name, __GI_##name)
+# define hidden_data_weak(name) hidden_data_def (name)
+# define hidden_data_ver(local, name) strong_data_alias (local, __GI_##name)
+# ifdef HAVE_ASM_GLOBAL_DOT_NAME
+# define HIDDEN_JUMPTARGET(name) .__GI_##name
+# else
+# define HIDDEN_JUMPTARGET(name) __GI_##name
+# endif
+# endif
+#else
+# ifndef __ASSEMBLER__
+# define hidden_proto(name, attrs...)
+# else
+# define HIDDEN_JUMPTARGET(name) JUMPTARGET(name)
+# endif /* Not __ASSEMBLER__ */
+# define hidden_weak(name)
+# define hidden_def(name)
+# define hidden_ver(local, name)
+# define hidden_data_weak(name)
+# define hidden_data_def(name)
+# define hidden_data_ver(local, name)
+#endif
+
+#if defined NOT_IN_libc && defined IS_IN_rtld
+# define rtld_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
+# define rtld_hidden_def(name) hidden_def (name)
+# define rtld_hidden_weak(name) hidden_weak (name)
+# define rtld_hidden_ver(local, name) hidden_ver (local, name)
+# define rtld_hidden_data_def(name) hidden_data_def (name)
+# define rtld_hidden_data_weak(name) hidden_data_weak (name)
+# define rtld_hidden_data_ver(local, name) hidden_data_ver (local, name)
+#else
+# define rtld_hidden_proto(name, attrs...)
+# define rtld_hidden_def(name)
+# define rtld_hidden_weak(name)
+# define rtld_hidden_ver(local, name)
+# define rtld_hidden_data_def(name)
+# define rtld_hidden_data_weak(name)
+# define rtld_hidden_data_ver(local, name)
+#endif
+
+#if !defined NOT_IN_libc
+# define libc_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
+# define libc_hidden_def(name) hidden_def (name)
+# define libc_hidden_weak(name) hidden_weak (name)
+# define libc_hidden_ver(local, name) hidden_ver (local, name)
+# define libc_hidden_data_def(name) hidden_data_def (name)
+# define libc_hidden_data_weak(name) hidden_data_weak (name)
+# define libc_hidden_data_ver(local, name) hidden_data_ver (local, name)
+#else
+# define libc_hidden_proto(name, attrs...)
+# define libc_hidden_def(name)
+# define libc_hidden_weak(name)
+# define libc_hidden_ver(local, name)
+# define libc_hidden_data_def(name)
+# define libc_hidden_data_weak(name)
+# define libc_hidden_data_ver(local, name)
+#endif
+
+#ifdef HAVE_TLS_MODEL_ATTRIBUTE
+# define attribute_tls_model_ie __attribute__ ((tls_model ("initial-exec")))
+#else
+# define attribute_tls_model_ie
+#endif
+
+#ifdef HAVE_Z_RELRO
+# define attribute_relro __attribute__ ((section (".data.rel.ro")))
+#else
+# define attribute_relro
+#endif
+
+/* Define SET as a symbol set. This may be required (it is in a.out) to
+ be able to use the set's contents. */
+# define symbol_set_define(set) symbol_set_declare(set)
+
+/* Declare SET for use in this module, if defined in another module.
+ In a shared library, this is always local to that shared object.
+ For static linking, the set might be wholly absent and so we use
+ weak references. */
+# define symbol_set_declare(set) \
+ extern char const __start_##set[] __symbol_set_attribute; \
+ extern char const __stop_##set[] __symbol_set_attribute;
+
+# define __symbol_set_attribute attribute_hidden
+
+/* Return a pointer (void *const *) to the first element of SET. */
+# define symbol_set_first_element(set) ((void *const *) (&__start_##set))
+
+/* Return true iff PTR (a void *const *) has been incremented
+ past the last element in SET. */
+# define symbol_set_end_p(set, ptr) ((ptr) >= (void *const *) &__stop_##set)
+
+/* Not compiling ELF shared libraries at all, so never any old versions. */
+# define SHLIB_COMPAT(lib, introduced, obsoleted) 0
+
+/* No versions to worry about, just make this the global definition. */
+# define versioned_symbol(lib, local, symbol, version) \
+ weak_alias (local, symbol)
+
+/* This should not appear outside `#if SHLIB_COMPAT (...)'. */
+# define compat_symbol(lib, local, symbol, version) ...
+
+#endif /* _LIBC_SYMBOLS_H */
Added: branches/uClibc-nptl/libpthread/nptl/compat/shlib-compat.h
===================================================================
--- branches/uClibc-nptl/libpthread/nptl/compat/shlib-compat.h 2005-06-03 02:18:43 UTC (rev 10455)
+++ branches/uClibc-nptl/libpthread/nptl/compat/shlib-compat.h 2005-06-03 02:32:55 UTC (rev 10456)
@@ -0,0 +1,89 @@
+/* Macros for managing ABI-compatibility definitions using ELF symbol versions.
+ Copyright (C) 2000, 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _SHLIB_COMPAT_H
+#define _SHLIB_COMPAT_H 1
+
+#if defined HAVE_ELF && defined DO_VERSIONING
+/* Since there is just one set of .d files generated, we need to
+ include this unconditionally to have the dependency noticed properly. */
+#include <abi-versions.h> /* header generated by abi-versions.awk */
+#endif
+
+#if defined HAVE_ELF && defined SHARED && defined DO_VERSIONING
+
+/* The file abi-versions.h (generated by scripts/abi-versions.awk) defines
+ symbols like `ABI_libm_GLIBC_2_0' for each version set in the source
+ code for each library. For a version set that is subsumed by a later
+ version set, the definition gives the subsuming set, i.e. if GLIBC_2_0
+ is subsumed by GLIBC_2_1, then ABI_libm_GLIBC_2_0 == ABI_libm_GLIBC_2_1.
+ Each version set that is to be distinctly defined in the output has an
+ unique positive integer value, increasing with newer versions. Thus,
+ evaluating two ABI_* symbols reduces to integer values that differ only
+ when the two version sets named are in fact two different ABIs we are
+ supporting. If these do not differ, then there is no need to compile in
+ extra code to support this version set where it has been superseded by a
+ newer version. The compatibility code should be conditionalized with
+ e.g. `#if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_2)' for code introduced
+ in the GLIBC_2.0 version and obsoleted in the GLIBC_2.2 version. */
+
+# define SHLIB_COMPAT(lib, introduced, obsoleted) \
+ ((IS_IN_##lib - 0) \
+ && (!(ABI_##lib##_##obsoleted - 0) \
+ || ((ABI_##lib##_##introduced - 0) < (ABI_##lib##_##obsoleted - 0))))
+
+# ifndef NOT_IN_libc
+# define IS_IN_libc 1
+# endif
+
+/* That header also defines symbols like `VERSION_libm_GLIBC_2_1' to
+ the version set name to use for e.g. symbols first introduced into
+ libm in the GLIBC_2.1 version. Definitions of symbols with explicit
+ versions should look like:
+ versioned_symbol (libm, new_foo, foo, GLIBC_2_1);
+ This will define the symbol `foo' with the appropriate default version,
+ i.e. either GLIBC_2.1 or the "earliest version" specified in
+ shlib-versions if that is newer. */
+
+# define versioned_symbol(lib, local, symbol, version) \
+ versioned_symbol_1 (local, symbol, VERSION_##lib##_##version)
+# define versioned_symbol_1(local, symbol, name) \
+ default_symbol_version (local, symbol, name)
+
+# define compat_symbol(lib, local, symbol, version) \
+ compat_symbol_1 (local, symbol, VERSION_##lib##_##version)
+# define compat_symbol_1(local, symbol, name) \
+ symbol_version (local, symbol, name)
+
+#else
+
+/* Not compiling ELF shared libraries at all, so never any old versions. */
+# define SHLIB_COMPAT(lib, introduced, obsoleted) 0
+
+/* No versions to worry about, just make this the global definition. */
+# define versioned_symbol(lib, local, symbol, version) \
+ weak_alias (local, symbol)
+
+/* This should not appear outside `#if SHLIB_COMPAT (...)'. */
+# define compat_symbol(lib, local, symbol, version) ...
+
+#endif
+
+
+#endif /* shlib-compat.h */
Added: branches/uClibc-nptl/libpthread/nptl/sysdeps/unix/sysv/linux/hp-timing.h
===================================================================
--- branches/uClibc-nptl/libpthread/nptl/sysdeps/unix/sysv/linux/hp-timing.h 2005-06-03 02:18:43 UTC (rev 10455)
+++ branches/uClibc-nptl/libpthread/nptl/sysdeps/unix/sysv/linux/hp-timing.h 2005-06-03 02:32:55 UTC (rev 10456)
@@ -0,0 +1,83 @@
+/* High precision, low overhead timing functions. Generic version.
+ Copyright (C) 1998, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper at cygnus.com>, 1998.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _HP_TIMING_H
+#define _HP_TIMING_H 1
+
+
+/* There are no generic definitions for the times. We could write something
+ using the `gettimeofday' system call where available but the overhead of
+ the system call might be too high.
+
+ In case a platform supports timers in the hardware the following macros
+ and types must be defined:
+
+ - HP_TIMING_AVAIL: test for availability.
+
+ - HP_TIMING_INLINE: this macro is non-zero if the functionality is not
+ implemented using function calls but instead uses some inlined code
+ which might simply consist of a few assembler instructions. We have to
+ know this since we might want to use the macros here in places where we
+ cannot make function calls.
+
+ - hp_timing_t: This is the type for variables used to store the time
+ values.
+
+ - HP_TIMING_ZERO: clear `hp_timing_t' object.
+
+ - HP_TIMING_NOW: place timestamp for current time in variable given as
+ parameter.
+
+ - HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the
+ HP_TIMING_DIFF macro.
+
+ - HP_TIMING_DIFF: compute difference between two times and store it
+ in a third. Source and destination might overlap.
+
+ - HP_TIMING_ACCUM: add time difference to another variable. This might
+ be a bit more complicated to implement for some platforms as the
+ operation should be thread-safe and 64bit arithmetic on 32bit platforms
+ is not.
+
+ - HP_TIMING_ACCUM_NT: this is the variant for situations where we know
+ there are no threads involved.
+
+ - HP_TIMING_PRINT: write decimal representation of the timing value into
+ the given string. This operation need not be inline even though
+ HP_TIMING_INLINE is specified.
+
+*/
+
+/* Provide dummy definitions. */
+#define HP_TIMING_AVAIL (0)
+#define HP_TIMING_INLINE (0)
+typedef int hp_timing_t;
+#define HP_TIMING_ZERO(Var)
+#define HP_TIMING_NOW(var)
+#define HP_TIMING_DIFF_INIT()
+#define HP_TIMING_DIFF(Diff, Start, End)
+#define HP_TIMING_ACCUM(Sum, Diff)
+#define HP_TIMING_ACCUM_NT(Sum, Diff)
+#define HP_TIMING_PRINT(Buf, Len, Val)
+
+/* Since this implementation is not available we tell the user about it. */
+#define HP_TIMING_NONAVAIL 1
+
+#endif /* hp-timing.h */
Added: branches/uClibc-nptl/libpthread/nptl/sysdeps/unix/sysv/linux/kernel-features.h
===================================================================
--- branches/uClibc-nptl/libpthread/nptl/sysdeps/unix/sysv/linux/kernel-features.h 2005-06-03 02:18:43 UTC (rev 10455)
+++ branches/uClibc-nptl/libpthread/nptl/sysdeps/unix/sysv/linux/kernel-features.h 2005-06-03 02:32:55 UTC (rev 10456)
@@ -0,0 +1,442 @@
+/* Set flags signalling availability of kernel features based on given
+ kernel version number.
+ Copyright (C) 1999-2003, 2004, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* This file must not contain any C code. At least it must be protected
+ to allow using the file also in assembler files. */
+
+#if defined __mips__
+# include <sgidefs.h>
+#endif
+
+#if __UCLIBC__
+# include <linux/version.h>
+# define __LINUX_KERNEL_VERSION LINUX_VERSION_CODE
+#endif
+
+#ifndef __LINUX_KERNEL_VERSION
+/* We assume the worst; all kernels should be supported. */
+# define __LINUX_KERNEL_VERSION 0
+#endif
+
+/* We assume for __LINUX_KERNEL_VERSION the same encoding used in
+ linux/version.h. I.e., the major, minor, and subminor all get a
+ byte with the major number being in the highest byte. This means
+ we can do numeric comparisons.
+
+ In the following we will define certain symbols depending on
+ whether the describes kernel feature is available in the kernel
+ version given by __LINUX_KERNEL_VERSION. We are not always exactly
+ recording the correct versions in which the features were
+ introduced. If somebody cares these values can afterwards be
+ corrected. Most of the numbers here are set corresponding to
+ 2.2.0. */
+
+/* `getcwd' system call. */
+#if __LINUX_KERNEL_VERSION >= 131584
+# define __ASSUME_GETCWD_SYSCALL 1
+#endif
+
+/* Real-time signal became usable in 2.1.70. */
+#if __LINUX_KERNEL_VERSION >= 131398
+# define __ASSUME_REALTIME_SIGNALS 1
+#endif
+
+/* When were the `pread'/`pwrite' syscalls introduced? */
+#if __LINUX_KERNEL_VERSION >= 131584
+# define __ASSUME_PREAD_SYSCALL 1
+# define __ASSUME_PWRITE_SYSCALL 1
+#endif
+
+/* When was `poll' introduced? */
+#if __LINUX_KERNEL_VERSION >= 131584
+# define __ASSUME_POLL_SYSCALL 1
+#endif
+
+/* The `lchown' syscall was introduced in 2.1.80. */
+#if __LINUX_KERNEL_VERSION >= 131408
+# define __ASSUME_LCHOWN_SYSCALL 1
+#endif
+
+/* When did the `setresuid' sysall became available? */
+#if __LINUX_KERNEL_VERSION >= 131584 && !defined __sparc__
+# define __ASSUME_SETRESUID_SYSCALL 1
+#endif
+
+/* The SIOCGIFNAME ioctl is available starting with 2.1.50. */
+#if __LINUX_KERNEL_VERSION >= 131408
+# define __ASSUME_SIOCGIFNAME 1
+#endif
+
+/* MSG_NOSIGNAL was at least available with Linux 2.2.0. */
+#if __LINUX_KERNEL_VERSION >= 131584
+# define __ASSUME_MSG_NOSIGNAL 1
+#endif
+
+/* On x86 another `getrlimit' syscall was added in 2.3.25. */
+#if __LINUX_KERNEL_VERSION >= 131865 && defined __i386__
+# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1
+#endif
+
+/* On x86 the truncate64/ftruncate64 syscalls were introduced in 2.3.31. */
+#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__
+# define __ASSUME_TRUNCATE64_SYSCALL 1
+#endif
+
+/* On x86 the mmap2 syscall was introduced in 2.3.31. */
+#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__
+# define __ASSUME_MMAP2_SYSCALL 1
+#endif
+
+/* On x86 the stat64/lstat64/fstat64 syscalls were introduced in 2.3.34. */
+#if __LINUX_KERNEL_VERSION >= 131874 && defined __i386__
+# define __ASSUME_STAT64_SYSCALL 1
+#endif
+
+/* On sparc and ARM the truncate64/ftruncate64/mmap2/stat64/lstat64/fstat64
+ syscalls were introduced in 2.3.35. */
+#if __LINUX_KERNEL_VERSION >= 131875 && (defined __sparc__ || defined __arm__)
+# define __ASSUME_TRUNCATE64_SYSCALL 1
+# define __ASSUME_MMAP2_SYSCALL 1
+# define __ASSUME_STAT64_SYSCALL 1
+#endif
+
+/* I know for sure that getrlimit are in 2.3.35 on powerpc. */
+#if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__
+# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1
+#endif
+
+/* I know for sure that these are in 2.3.35 on powerpc. But PowerPC64 does not
+ support separate 64-bit syscalls, already 64-bit */
+#if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__ \
+ && !defined __powerpc64__
+# define __ASSUME_TRUNCATE64_SYSCALL 1
+# define __ASSUME_STAT64_SYSCALL 1
+#endif
+
+/* Linux 2.3.39 introduced 32bit UID/GIDs. Some platforms had 32
+ bit type all along. */
+#if __LINUX_KERNEL_VERSION >= 131879 || defined __powerpc__ || defined __mips__
+# define __ASSUME_32BITUIDS 1
+#endif
+
+/* Linux 2.3.39 sparc added setresuid. */
+#if __LINUX_KERNEL_VERSION >= 131879 && defined __sparc__
+# define __ASSUME_SETRESUID_SYSCALL 1
+#endif
+
+#if __LINUX_KERNEL_VERSION >= 131879
+# define __ASSUME_SETRESGID_SYSCALL 1
+#endif
+
+/* Linux 2.3.39 introduced IPC64. Except for powerpc. */
+#if __LINUX_KERNEL_VERSION >= 131879 && !defined __powerpc__
+# define __ASSUME_IPC64 1
+#endif
+
+/* MIPS platforms had IPC64 all along. */
+#if defined __mips__
+# define __ASSUME_IPC64 1
+#endif
+
+/* We can use the LDTs for threading with Linux 2.3.99 and newer. */
+#if __LINUX_KERNEL_VERSION >= 131939
+# define __ASSUME_LDT_WORKS 1
+#endif
+
+/* Linux 2.4.0 on PPC introduced a correct IPC64. But PowerPC64 does not
+ support a separate 64-bit sys call, already 64-bit */
+#if __LINUX_KERNEL_VERSION >= 132096 && defined __powerpc__ \
+ && !defined __powerpc64__
+# define __ASSUME_IPC64 1
+#endif
+
+/* SH kernels got stat64, mmap2, and truncate64 during 2.4.0-test. */
+#if __LINUX_KERNEL_VERSION >= 132096 && defined __sh__
+# define __ASSUME_TRUNCATE64_SYSCALL 1
+# define __ASSUME_MMAP2_SYSCALL 1
+# define __ASSUME_STAT64_SYSCALL 1
+#endif
+
+/* The changed st_ino field appeared in 2.4.0-test6. But we cannot
+ distinguish this version from other 2.4.0 releases. Therefore play
+ save and assume it available is for 2.4.1 and up. However, SH is lame,
+ and still does not have a 64-bit inode field. */
+#if __LINUX_KERNEL_VERSION >= 132097 && !defined __alpha__ && !defined __sh__
+# define __ASSUME_ST_INO_64_BIT 1
+#endif
+
+/* To support locking of large files a new fcntl() syscall was introduced
+ in 2.4.0-test7. We test for 2.4.1 for the earliest version we know
+ the syscall is available. */
+#if __LINUX_KERNEL_VERSION >= 132097 && (defined __i386__ || defined __sparc__)
+# define __ASSUME_FCNTL64 1
+#endif
+
+/* The AT_CLKTCK auxiliary vector entry was introduction in the 2.4.0
+ series. */
+#if __LINUX_KERNEL_VERSION >= 132097
+# define __ASSUME_AT_CLKTCK 1
+#endif
+
+/* Arm got fcntl64 in 2.4.4, PowerPC and SH have it also in 2.4.4 (I
+ don't know when it got introduced). But PowerPC64 does not support
+ separate FCNTL64 call, FCNTL is already 64-bit */
+#if __LINUX_KERNEL_VERSION >= 132100 \
+ && (defined __arm__ || defined __powerpc__ || defined __sh__) \
+ && !defined __powerpc64__
+# define __ASSUME_FCNTL64 1
+#endif
+
+/* The getdents64 syscall was introduced in 2.4.0-test7. We test for
+ 2.4.1 for the earliest version we know the syscall is available. */
+#if __LINUX_KERNEL_VERSION >= 132097
+# define __ASSUME_GETDENTS64_SYSCALL 1
+#endif
+
+/* When did O_DIRECTORY became available? Early in 2.3 but when?
+ Be safe, use 2.3.99. */
+#if __LINUX_KERNEL_VERSION >= 131939
+# define __ASSUME_O_DIRECTORY 1
+#endif
+
+/* Starting with one of the 2.4.0 pre-releases the Linux kernel passes
+ up the page size information. */
+#if __LINUX_KERNEL_VERSION >= 132097
+# define __ASSUME_AT_PAGESIZE 1
+#endif
+
+/* Starting with at least 2.4.0 the kernel passes the uid/gid unconditionally
+ up to the child. */
+#if __LINUX_KERNEL_VERSION >= 132097
+# define __ASSUME_AT_XID 1
+#endif
+
+/* Starting with 2.4.5 kernels PPC passes the AUXV in the standard way
+ and the vfork syscall made it into the official kernel. */
+#if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__
+# define __ASSUME_STD_AUXV 1
+# define __ASSUME_VFORK_SYSCALL 1
+#endif
+
+/* Starting with 2.4.5 kernels the mmap2 syscall made it into the official
+ kernel. But PowerPC64 does not support a separate MMAP2 call. */
+#if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__ \
+ && !defined __powerpc64__
+# define __ASSUME_MMAP2_SYSCALL 1
+#endif
+
+/* Starting with 2.4.21 PowerPC implements the new prctl syscall.
+ This allows applications to get/set the Floating Point Exception Mode. */
+#if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc__
+# define __ASSUME_NEW_PRCTL_SYSCALL 1
+#endif
+
+/* Starting with 2.4.21 the PowerPC32 clone syscall works as expected. */
+#if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc__ \
+ && !defined __powerpc64__
+# define __ASSUME_FIXED_CLONE_SYSCALL 1
+#endif
+
+/* Starting with 2.4.21 PowerPC64 implements the new rt_sigreturn syscall.
+ The new rt_sigreturn takes an ucontext pointer allowing rt_sigreturn
+ to be used in the set/swapcontext implementation. */
+#if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc64__
+# define __ASSUME_NEW_RT_SIGRETURN_SYSCALL 1
+#endif
+
+/* On x86, the set_thread_area syscall was introduced in 2.5.29, but its
+ semantics was changed in 2.5.30, and again after 2.5.31. */
+#if __LINUX_KERNEL_VERSION >= 132384 && defined __i386__
+# define __ASSUME_SET_THREAD_AREA_SYSCALL 1
+#endif
+
+/* The vfork syscall on x86 and arm was definitely available in 2.4. */
+#if __LINUX_KERNEL_VERSION >= 132097 && (defined __i386__ || defined __arm__)
+# define __ASSUME_VFORK_SYSCALL 1
+#endif
+
+/* There are an infinite number of PA-RISC kernel versions numbered
+ 2.4.0. But they've not really been released as such. We require
+ and expect the final version here. */
+#ifdef __hppa__
+# define __ASSUME_32BITUIDS 1
+# define __ASSUME_TRUNCATE64_SYSCALL 1
+# define __ASSUME_MMAP2_SYSCALL 1
+# define __ASSUME_STAT64_SYSCALL 1
+# define __ASSUME_IPC64 1
+# define __ASSUME_ST_INO_64_BIT 1
+# define __ASSUME_FCNTL64 1
+# define __ASSUME_GETDENTS64_SYSCALL 1
+#endif
+
+/* Alpha switched to a 64-bit timeval sometime before 2.2.0. */
+#if __LINUX_KERNEL_VERSION >= 131584 && defined __alpha__
+# define __ASSUME_TIMEVAL64 1
+#endif
+
+#if defined __mips__ && _MIPS_SIM == _ABIN32
+# define __ASSUME_FCNTL64 1
+#endif
+
+/* The late 2.5 kernels saw a lot of new CLONE_* flags. Summarize
+ their availability with one define. The changes were made first
+ for i386 and the have to be done separately for the other archs.
+ For i386 we pick 2.5.50 as the first version with support. */
+#if __LINUX_KERNEL_VERSION >= 132402 && defined __i386__
+# define __ASSUME_CLONE_THREAD_FLAGS 1
+#endif
+
+/* These features were surely available with 2.4.12. */
+#if __LINUX_KERNEL_VERSION >= 132108 && defined __mc68000__
+# define __ASSUME_MMAP2_SYSCALL 1
+# define __ASSUME_TRUNCATE64_SYSCALL 1
+# define __ASSUME_STAT64_SYSCALL 1
+# define __ASSUME_FCNTL64 1
+# define __ASSUME_VFORK_SYSCALL 1
+#endif
+
+/* Beginning with 2.5.63 support for realtime and monotonic clocks and
+ timers based on them is available. */
+#if __LINUX_KERNEL_VERSION >= 132415
+# define __ASSUME_POSIX_TIMERS 1
+#endif
+
+/* The late 2.5 kernels saw a lot of new CLONE_* flags. Summarize
+ their availability with one define. The changes were made first
+ for i386 and the have to be done separately for the other archs.
+ For ia64, s390*, PPC, x86-64 we pick 2.5.64 as the first version
+ with support. */
+#if __LINUX_KERNEL_VERSION >= 132416 \
+ && (defined __ia64__ || defined __s390__ || defined __powerpc__ \
+ || defined __x86_64__ || defined __sh__)
+# define __ASSUME_CLONE_THREAD_FLAGS 1
+#endif
+
+/* With kernel 2.4.17 we always have netlink support. */
+#if __LINUX_KERNEL_VERSION >= (132096+17)
+# define __ASSUME_NETLINK_SUPPORT 1
+#endif
+
+/* The requeue futex functionality was introduced in 2.5.70. */
+#if __LINUX_KERNEL_VERSION >= 132422
+# define __ASSUME_FUTEX_REQUEUE 1
+#endif
+
+/* The statfs64 syscalls are available in 2.5.74. */
+#if __LINUX_KERNEL_VERSION >= 132426
+# define __ASSUME_STATFS64 1
+#endif
+
+/* Starting with at least 2.5.74 the kernel passes the setuid-like exec
+ flag unconditionally up to the child. */
+#if __LINUX_KERNEL_VERSION >= 132426
+# define __ASSUME_AT_SECURE 1
+#endif
+
+/* Starting with the 2.5.75 kernel the kernel fills in the correct value
+ in the si_pid field passed as part of the siginfo_t struct to signal
+ handlers. */
+#if __LINUX_KERNEL_VERSION >= 132427
+# define __ASSUME_CORRECT_SI_PID 1
+#endif
+
+/* The tgkill syscall was instroduced for i386 in 2.5.75. For Alpha
+ it was introduced in 2.6.0-test1 which unfortunately cannot be
+ distinguished from 2.6.0. On x86-64, ppc, and ppc64 it was
+ introduced in 2.6.0-test3. */
+#if (__LINUX_KERNEL_VERSION >= 132427 && defined __i386__) \
+ || (__LINUX_KERNEL_VERSION >= 132609 && defined __alpha__) \
+ || (__LINUX_KERNEL_VERSION >= 132609 && defined __x86_64__) \
+ || (__LINUX_KERNEL_VERSION >= 132609 && defined __powerpc__) \
+ || (__LINUX_KERNEL_VERSION >= 132609 && defined __sh__)
+# define __ASSUME_TGKILL 1
+#endif
+
+/* The utimes syscall has been available for some architectures
+ forever. For x86 it was introduced after 2.5.75, for x86-64,
+ ppc, and ppc64 it was introduced in 2.6.0-test3. */
+#if defined __alpha__ || defined __ia64__ || defined __hppa__ \
+ || defined __sparc__ \
+ || (__LINUX_KERNEL_VERSION > 132427 && defined __i386__) \
+ || (__LINUX_KERNEL_VERSION > 132609 && defined __x86_64__) \
+ || (__LINUX_KERNEL_VERSION >= 132609 && defined __powerpc__) \
+ || (__LINUX_KERNEL_VERSION >= 132609 && defined __sh__)
+# define __ASSUME_UTIMES 1
+#endif
+
+// XXX Disabled for now since the semantics we want is not achieved.
+#if 0
+/* The CLONE_STOPPED flag was introduced in the 2.6.0-test1 series. */
+#if __LINUX_KERNEL_VERSION >= 132609
+# define __ASSUME_CLONE_STOPPED 1
+#endif
+#endif
+
+/* The fixed version of the posix_fadvise64 syscall appeared in
+ 2.6.0-test3. At least for x86. Powerpc support appeared in
+ 2.6.2, but for 32-bit userspace only. */
+#if (__LINUX_KERNEL_VERSION >= 132609 && defined __i386__) \
+ || (__LINUX_KERNEL_VERSION >= 132610 && defined __powerpc__ \
+ && !defined __powerpc64__)
+# define __ASSUME_FADVISE64_64_SYSCALL 1
+#endif
+
+/* The PROT_GROWSDOWN/PROT_GROWSUP flags were introduced in the 2.6.0-test
+ series. */
+#if __LINUX_KERNEL_VERSION >= 132609
+# define __ASSUME_PROT_GROWSUPDOWN 1
+#endif
+
+/* Starting with 2.6.0 PowerPC adds signal/swapcontext support for Vector
+ SIMD (AKA Altivec, VMX) instructions and register state. This changes
+ the overall size of the sigcontext and adds the swapcontext syscall. */
+#if __LINUX_KERNEL_VERSION >= 132608 && defined __powerpc__
+# define __ASSUME_SWAPCONTEXT_SYSCALL 1
+#endif
+
+/* The CLONE_DETACHED flag is not necessary in 2.6.2 kernels, it is
+ implied. */
+#if __LINUX_KERNEL_VERSION >= 132610
+# define __ASSUME_NO_CLONE_DETACHED 1
+#endif
+
+/* Starting with version 2.6.4-rc1 the getdents syscall returns d_type
+ information as well. */
+#if __LINUX_KERNEL_VERSION >= 132612
+# define __ASSUME_GETDENTS32_D_TYPE 1
+#endif
+
+/* Starting with version 2.5.3, the initial location returned by `brk'
+ after exec is always rounded up to the next page. */
+#if __LINUX_KERNEL_VERSION >= 132355
+# define __ASSUME_BRK_PAGE_ROUNDED 1
+#endif
+
+/* Starting with version 2.6.9, the waitid system call is available.
+ Except for powerpc and powerpc64, where it is available in 2.6.12. */
+#if (__LINUX_KERNEL_VERSION >= 0x020609 && !defined __powerpc__) \
+ || (__LINUX_KERNEL_VERSION >= 0x02060c && defined __powerpc__)
+# define __ASSUME_WAITID_SYSCALL 1
+#endif
+
+/* Starting with version 2.6.9, SSI_IEEE_RAISE_EXCEPTION exists. */
+#if __LINUX_KERNEL_VERSION >= 0x020609 && defined __alpha__
+#define __ASSUME_IEEE_RAISE_EXCEPTION 1
+#endif
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