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9 Commits

Author SHA1 Message Date
Joseph Myers
d0f5b3f851 Increase minimum Linux kernel version to 2.6.32. 
This patch increases the minimum Linux kernel version for glibc to
2.6.32, as discussed in the thread starting at
<https://sourceware.org/ml/libc-alpha/2014-01/msg00511.html>.

This patch just does the minimal change to arch_minimum_kernel
settings (and LIBC_LINUX_VERSION, which determines the minimum kernel
headers version, as it doesn't make sense for that to be older than
the minimum kernel that can be used at runtime).  Followups would be
expected to do, roughly and not necessarily precisely in this order:

* Remove __LINUX_KERNEL_VERSION checks in kernel-features.h files
  where those checks are always true / always false for kernels 2.6.32
  and above.

* Otherwise simplify/improve conditionals in those files (for example,
  where defining once in the main file then undefining in
  architecture-specific files makes things clearer than having lots of
  separate definitions of the same macro), possibly fixing in the
  process cases where a macro should optimally have been defined for a
  given architecture but wasn't.  (In the review in preparation for
  this version increase I checked what the right conditions should be
  for all macros in the main kernel-features.h whose definitions there
  would have been affected by the increase - but I only fixed that
  subset of the issues found where --enable-kernel=2.6.32 would have
  caused a kernel feature to be wrongly assumed to be present, not any
  cases where a feature is not assumed but could be assumed.)

* Remove conditionals on __ASSUME_* where they can now be taken to be
  always-true, and the definitions when the macros are only used in
  Linux-specific files.

* Split more architectures out of the main kernel-features.h (like
  ex-ports architectures), once various of the architecture
  conditionals there have been eliminated so the new
  architecture-specific files are no larger than actually necessary.

Tested x86_64.

2014-03-27  Joseph Myers  <joseph@codesourcery.com>

	[BZ #9894]
	* sysdeps/unix/sysv/linux/configure.ac (LIBC_LINUX_VERSION):
	Change to 2.6.32.
	(arch_minimum_kernel): Change all 2.6.16 settings to 2.6.32.
	* sysdeps/unix/sysv/linux/configure: Regenerated.
	* sysdeps/unix/sysv/linux/microblaze/configure.ac: Remove file.
	* sysdeps/unix/sysv/linux/microblaze/configure: Likewise.
	* sysdeps/unix/sysv/linux/tile/configure.ac: Likewise.
	* sysdeps/unix/sysv/linux/tile/configure: Likewise.
	* README: Update reference to required Linux kernel version.
	* manual/install.texi (Linux): Update reference to required Linux
	kernel headers version.
	* INSTALL: Regenerated.
 2014-04-30 15:41:03 +00:00
Torvald Riegel
36875b06e0 Fixed and unified pthread_once. 
[BZ #15215] This unifies various pthread_once architecture-specific
implementations which were using the same algorithm with slightly different
implementations.  It also adds missing memory barriers that are required for
correctness.
 2014-04-11 15:54:19 +02:00
Adhemerval Zanella
01f8eac224 Move __PTHREAD_SPINS definition to architecture specific header 
This patch moves the __PTHREAD_SPINS definition to arch specific header
since pthread_mutex_t layout is also arch specific.  This leads to no
need to defining __PTHREAD_MUTEX_HAVE_ELISION and thus removing of the
undefined compiler warning.
 2014-04-09 06:41:44 -05:00
Joseph Myers
5c7808498e Fix POSIX namespace for <bits/siginfo.h> (bug 16674). 
<bits/siginfo.h> causes symbols ILL_*, FPE_*, SEGV_* BUS_*, CLD_*,
POLL_* and TRAP_* to be exposed in <signal.h> (and <sys/wait.h>), even
though those symbols are not in non-XSI POSIX before POSIX.1-2008 and
even in POSIX.1-2008 the TRAP_* symbols are XSI-only.  This patch
conditions the symbols appropriately in the various <bits/siginfo.h>
implementations (various <signal.h> and <sys/wait.h> conformtest
issues remain for standards other than POSIX (1995/6)).  Tested
x86_64.

	[BZ #16674]
	* bits/siginfo.h (ILL_ILLOPC): Condition on [__USE_XOPEN_EXTENDED
	|| __USE_XOPEN2K8].
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/siginfo.h (ILL_ILLOPC):
	Likewise.
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(BUS_MCEERR_AR): Likewise.
	(BUS_MCEERR_AO): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* sysdeps/unix/sysv/linux/bits/siginfo.h (ILL_ILLOPC): Likewise.
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(BUS_MCEERR_AR): Likewise.
	(BUS_MCEERR_AO): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* sysdeps/unix/sysv/linux/ia64/bits/siginfo.h (ILL_ILLOPC):
	Likewise.
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(ILL_BADIADDR): Likewise.
	(ILL_BREAK): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(FPE_DECOVF): Likewise.
	(FPE_DECDIV): Likewise.
	(FPE_DECERR): Likewise.
	(FPE_INVASC): Likewise.
	(FPE_INVDEC): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(SEGV_PSTKOVF): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(BUS_MCEERR_AR): Likewise.
	(BUS_MCEERR_AO): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(TRAP_BRANCH): Likewise.
	(TRAP_HWBKPT): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/siginfo.h (ILL_ILLOPC): Likewise.
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(BUS_MCEERR_AR): Likewise.
	(BUS_MCEERR_AO): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* sysdeps/unix/sysv/linux/s390/bits/siginfo.h (ILL_ILLOPC): Likewise.
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(BUS_MCEERR_AR): Likewise.
	(BUS_MCEERR_AO): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/siginfo.h (ILL_ILLOPC): Likewise.
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(BUS_MCEERR_AR): Likewise.
	(BUS_MCEERR_AO): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* sysdeps/unix/sysv/linux/tile/bits/siginfo.h (ILL_ILLOPC): Likewise.
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(ILL_DBLFLT): Likewise.
	(ILL_HARDWALL): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(BUS_MCEERR_AR): Likewise.
	(BUS_MCEERR_AO): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* sysdeps/unix/sysv/linux/x86/bits/siginfo.h (ILL_ILLOPC): Likewise.
	(ILL_ILLOPN): Likewise.
	(ILL_ILLADR): Likewise.
	(ILL_ILLTRP): Likewise.
	(ILL_PRVOPC): Likewise.
	(ILL_PRVREG): Likewise.
	(ILL_COPROC): Likewise.
	(ILL_BADSTK): Likewise.
	(FPE_INTDIV): Likewise.
	(FPE_INTOVF): Likewise.
	(FPE_FLTDIV): Likewise.
	(FPE_FLTOVF): Likewise.
	(FPE_FLTUND): Likewise.
	(FPE_FLTRES): Likewise.
	(FPE_FLTINV): Likewise.
	(FPE_FLTSUB): Likewise.
	(SEGV_MAPERR): Likewise.
	(SEGV_ACCERR): Likewise.
	(BUS_ADRALN): Likewise.
	(BUS_ADRERR): Likewise.
	(BUS_OBJERR): Likewise.
	(BUS_MCEERR_AR): Likewise.
	(BUS_MCEERR_AO): Likewise.
	(TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
	(TRAP_TRACE): Likewise.
	(CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
	__USE_XOPEN2K8].
	(CLD_KILLED): Likewise.
	(CLD_DUMPED): Likewise.
	(CLD_TRAPPED): Likewise.
	(CLD_STOPPED): Likewise.
	(CLD_CONTINUED): Likewise.
	(POLL_IN): Likewise.
	(POLL_OUT): Likewise.
	(POLL_MSG): Likewise.
	(POLL_ERR): Likewise.
	(POLL_PRI): Likewise.
	(POLL_HUP): Likewise.
	* conform/Makefile (test-xfail-POSIX/signal.h/conform): Remove.
	(test-xfail-POSIX/sys/wait.h/conform): Likewise.
 2014-03-07 23:57:56 +00:00
Joseph Myers
67737b8f07 Don't define __ASSUME_UTIMES for linux-generic architectures. 
The __ASSUME_UTIMES macro describes whether the utimes syscall is
present.  For linux-generic architectures, it isn't (utimensat is
instead), so the macro should not be defined for them; this patch
removes the spurious definitions for such architectures.  (Those
definitions don't actually cause any user-visible bug, because
futimes.c doesn't use __ASSUME_UTIMES if __ASSUME_UTIMENSAT is
defined, and futimesat.c and utimes.c are overridden for
linux-generic, but the definitions are still logically incorrect.)

	* sysdeps/unix/sysv/linux/aarch64/kernel-features.h
	(__ASSUME_UTIMES): Remove.
	* sysdeps/unix/sysv/linux/tile/kernel-features.h
	(__ASSUME_UTIMES): Likewise.
 2014-03-06 14:13:18 +00:00
Joseph Myers
bc688c1029 Fix __ASSUME_SENDMMSG issues (bug 16611). 
Similar to the issues for accept4 and recvmmsg, __ASSUME_SENDMMSG is
also confused about whether it relates to function availability or
socketcall operation availability, and the conditions for the
definition are always wrong (sendmmsg appeared in Linux kernel 3.0,
not 2.6.39); this is now bug 16611.

This patch splits the macro into separate macros like those for
accept4 and recvmmsg, defining them for appropriate kernel versions.

Tested x86_64, including that disassembly of the installed shared
libraries is unchanged by this patch.

	[BZ #16611]
	* sysdeps/unix/sysv/linux/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030000 && __ASSUME_SOCKETCALL]
	(__ASSUME_SENDMMSG_SOCKETCALL): Define.
	[__LINUX_KERNEL_VERSION >= 0x030000 && (__i386__ || __x86_64__ ||
	__powerpc__ || __sh__ || __sparc__)] (__ASSUME_SENDMMSG_SYSCALL):
	Likewise.
	[__i386__ || __powerpc__ || __sh__ || __sparc__]
	(__ASSUME_SENDMMSG_SYSCALL_WITH_SOCKETCALL): Likewise.
	[__ASSUME_SENDMMSG_SOCKETCALL || __ASSUME_SENDMMSG_SYSCALL]
	(__ASSUME_SENDMMSG): Define instead of using previous
	[__LINUX_KERNEL_VERSION >= 0x020627] condition.
	* sysdeps/unix/sysv/linux/aarch64/kernel-features.h
	(__ASSUME_SENDMMSG_SYSCALL): Define.
	* sysdeps/unix/sysv/linux/alpha/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030200] (__ASSUME_SENDMMSG_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/arm/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030000] (__ASSUME_SENDMMSG_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/ia64/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030000] (__ASSUME_SENDMMSG_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/internal_sendmmsg.S [__ASSUME_SOCKETCALL
	&& !__ASSUME_SENDMMSG_SYSCALL_WITH_SOCKETCALL &&
	!__ASSUME_SENDMMSG_SYSCALL] (__NR_sendmmsg): Undefine.
	[__ASSUME_SENDMMSG]: Change conditionals to
	[__ASSUME_SENDMMSG_SOCKETCALL].
	* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030300] (__ASSUME_SENDMMSG_SYSCALL):
	Define.
	* sysdeps/unix/sysv/linux/mips/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030100] (__ASSUME_SENDMMSG_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/sendmmsg.c [__ASSUME_SOCKETCALL &&
	!__ASSUME_SENDMMSG_SYSCALL_WITH_SOCKETCALL &&
	!__ASSUME_SENDMMSG_SYSCALL] (__NR_sendmmsg): Undefine.
	[!__ASSUME_SENDMMSG]: Change conditional to
	[!__ASSUME_SENDMMSG_SOCKETCALL].
	* sysdeps/unix/sysv/linux/tile/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030000] (__ASSUME_SENDMMSG_SYSCALL):
	Define.

	* sysdeps/unix/sysv/linux/hppa/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030100] (__ASSUME_SENDMMSG_SYSCALL):
	Define.
 2014-02-20 17:55:35 +00:00
Joseph Myers
0e31b18ca2 Fix __ASSUME_RECVMMSG issues (bug 16610). 
Similar to the issues for accept4, __ASSUME_RECVMMSG is also confused
about whether it relates to function availability or socketcall
operation availability; this is now bug 16610.

Nothing actually tests __ASSUME_RECVMMSG for function availability,
but implicit in the definition in kernel-features.h is the idea that
it makes sense when the syscall is available and socketcall is not
being used.  As with accept4, there are architectures where the
syscall was added later than the socketcall operation, meaning that
assuming glibc is built with recent enough kernel headers, it does not
attempt to use socketcall for these operations and __ASSUME_RECVMMSG
gets defined for kernels >= 2.6.33 even when the syscall was only
added later.

This patch splits the macro into separate macros like those used for
accept4; having similar macro structure in both cases (and for
sendmmsg once I've dealt with that) seems likely to be less confusing
than having a different structure on the basis of nothing actually
needing to assume the recvmmsg function works.  Appropriate
definitions are added for all architectures.

Architecture-specific note: Tile's kernel-features.h says "TILE glibc
support starts with 2.6.36", which is accurate in that 2.6.36 was the
first kernel version with Tile support, and on that basis I've made
that header define __ASSUME_RECVMMSG_SYSCALL unconditionally.
However, Tile's configure.ac has arch_minimum_kernel=2.6.32.  Since
arch_minimum_kernel is meant to reflect only kernel.org kernel
versions, I think that should change to 2.6.36.  (If using glibc with
kernel versions from before a port went in kernel.org, it's your
responsibility to change arch_minimum_kernel in a local patch, and at
the same time to adjust any __ASSUME_* definitions that may not be
correct for your older kernel; for developing the official glibc it
should only ever be necessary to consider what official kernel.org
releases support.)

Tested x86_64, including that disassembly of the installed shared
libraries is unchanged by this patch.

	[BZ #16610]
	* sysdeps/unix/sysv/linux/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020621 && __ASSUME_SOCKETCALL]
	(__ASSUME_RECVMMSG_SOCKETCALL): Define.
	[(__LINUX_KERNEL_VERSION >= 0x020621 && (__i386__ || __x86_64__ ||
	__sparc__)) || (__LINUX_KERNEL_VERSION >= 0x020625 && (__powerpc__
	|| __sh__))] (__ASSUME_RECVMMSG_SYSCALL): Likewise.
	[__i386__ || __sparc__]
	(__ASSUME_RECVMMSG_SYSCALL_WITH_SOCKETCALL): Likewise.
	[__ASSUME_RECVMMSG_SOCKETCALL || __ASSUME_RECVMMSG_SYSCALL]
	(__ASSUME_RECVMMSG): Define instead of using previous
	[__LINUX_KERNEL_VERSION >= 0x020621] condition.
	* sysdeps/unix/sysv/linux/aarch64/kernel-features.h
	(__ASSUME_RECVMMSG_SYSCALL): Define.
	* sysdeps/unix/sysv/linux/alpha/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/arm/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/ia64/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/internal_recvmmsg.S [__ASSUME_SOCKETCALL
	&& !__ASSUME_RECVMMSG_SYSCALL_WITH_SOCKETCALL &&
	!__ASSUME_RECVMMSG_SYSCALL] (__NR_recvmmsg): Undefine.
	[__ASSUME_RECVMMSG]: Change condition to
	[__ASSUME_RECVMMSG_SOCKETCALL].
	* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG_SYSCALL):
	Define.
	(__ASSUME_RECVMMSG_SYSCALL_WITH_SOCKETCALL): Likewise.
	* sysdeps/unix/sysv/linux/mips/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_RECVMMSG_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/recvmmsg.c [__ASSUME_SOCKETCALL &&
	!__ASSUME_RECVMMSG_SYSCALL_WITH_SOCKETCALL &&
	!__ASSUME_RECVMMSG_SYSCALL] (__NR_recvmmsg): Undefine.
	[!__ASSUME_RECVMMSG]: Change condition to
	[!__ASSUME_RECVMMSG_SOCKETCALL].
	* sysdeps/unix/sysv/linux/tile/kernel-features.h
	(__ASSUME_RECVMMSG_SYSCALL): Define.

	* sysdeps/unix/sysv/linux/hppa/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020622] (__ASSUME_RECVMMSG_SYSCALL):
	Define.
 2014-02-20 17:53:08 +00:00
Joseph Myers
dd481ccffd Fix __ASSUME_ACCEPT4 issues (bug 16609). 
In <https://sourceware.org/ml/libc-alpha/2013-12/msg00008.html>,
Aurelien noted issues with the definition of __ASSUME_ACCEPT4, which I
discussed in more detail in
<https://sourceware.org/ml/libc-alpha/2013-12/msg00014.html>; these
are now bug 16609.

As previously noted, __ASSUME_ACCEPT4 is used in two ways:

* In OS-independent code, to mean "accept4 can be assumed to work
  rather than fail with ENOSYS".  It doesn't matter whether it's
  implemented with socketcall or a separate syscall.

* In Linux-specific code, to mean "the socketcall multiplex syscall
  can be assumed to handle the accept4 operation.  When used in
  Linux-specific code, it *never* refers to anything relating to the
  accept4 syscall, only to the socketcall multiplexer.

This patch splits the macro into separate __ASSUME_ACCEPT4_SOCKETCALL,
__ASSUME_ACCEPT4_SYSCALL and __ASSUME_ACCEPT4 to clarify the different
cases involved.  A macro __ASSUME_SOCKETCALL is added for convenience
in writing logic relating to all socketcall architectures.  In
addition, to address the issue of architectures where socketcall
support for accept4 was added before a separate syscall was added (and
so the separate syscall should not be used unless known to be present
or fallback to socketcall is available), a fourth macro
__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL is added to indicate that the
syscall became available at the same time as socketcall support.  This
is then used in the relevant places in a conditional determining
whether to undefine __NR_accept4 (the simple approach to avoiding the
syscall's presence causing problems; I didn't try to implement runtime
fallback from the syscall to socketcall).

Architecture-specific note: alpha defined __ASSUME_ACCEPT4 for 2.6.33
and later, but actually the syscall was added for alpha in 3.2, so
this patch uses the correct condition for __ASSUME_ACCEPT4_SYSCALL
there.

Tested x86_64, including that disassembly of the installed shared
libraries is unchanged by this patch.

	[BZ #16609]
	* sysdeps/unix/sysv/linux/kernel-features.h [__i386__ ||
	__powerpc__ || __s390__ || __sh__ || __sparc__]
	(__ASSUME_SOCKETCALL): Define.
	[__LINUX_KERNEL_VERSION && __ASSUME_SOCKETCALL]
	(__ASSUME_ACCEPT4_SOCKETCALL): Likewise.
	[(__LINUX_KERNEL_VERSION >= 0x02061c && (__x86_64__ || __sparc__))
	|| (__LINUX_KERNEL_VERSION >= 0x020625 && (__powerpc__ ||
	__sh__))] (__ASSUME_ACCEPT4_SYSCALL): Likewise.
	[__sparc__] (__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL): Likewise.
	[__ASSUME_ACCEPT4_SOCKETCALL || __ASSUME_ACCEPT4_SYSCALL]
	(__ASSUME_ACCEPT4): Define instead of using previous
	[__LINUX_KERNEL_VERSION >= 0x02061c && (__i386__ || __x86_64__ ||
	__powerpc__ || __sparc__ || __s390__)] condition.
	* sysdeps/unix/sysv/linux/aarch64/kernel-features.h
	(__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL.
	* sysdeps/unix/sysv/linux/accept4.c [__ASSUME_SOCKETCALL &&
	!__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL &&
	!__ASSUME_ACCEPT4_SYSCALL] (__NR_accept4): Undefine.
	[!__ASSUME_ACCEPT4]: Change condition to
	[!__ASSUME_ACCEPT4_SOCKETCALL].
	* sysdeps/unix/sysv/linux/alpha/kernel-features.h
	(__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL.  Correct
	condition to [__LINUX_KERNEL_VERSION >= 0x030200].
	* sysdeps/unix/sysv/linux/arm/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020624] (__ASSUME_ACCEPT4): Change to
	__ASSUME_ACCEPT4_SYSCALL.
	* sysdeps/unix/sysv/linux/i386/accept4.S [__ASSUME_ACCEPT4]:
	Change conditions to [__ASSUME_ACCEPT4_SOCKETCALL].
	* sysdeps/unix/sysv/linux/ia64/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x030300] (__ASSUME_ACCEPT4): Change to
	__ASSUME_ACCEPT4_SYSCALL.
	* sysdeps/unix/sysv/linux/internal_accept4.S [__ASSUME_SOCKETCALL
	&& !__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL &&
	!__ASSUME_ACCEPT4_SYSCALL] (__NR_accept4): Undefine.
	[__ASSUME_ACCEPT4]: Change condition to
	[__ASSUME_ACCEPT4_SOCKETCALL].
	* sysdeps/unix/sysv/linux/m68k/kernel-features.h
	(__ASSUME_SOCKETCALL): Define.
	[__LINUX_KERNEL_VERSION >= 0x02061c] (__ASSUME_ACCEPT4): Remove.
	* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
	(__ASSUME_SOCKETCALL): Define.
	(__ASSUME_ACCEPT4): Remove.
	[__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_ACCEPT4_SYSCALL):
	Define.
	* sysdeps/unix/sysv/linux/mips/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x02061f] (__ASSUME_ACCEPT4_SYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/tile/kernel-features.h
	(__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL.

	* sysdeps/unix/sysv/linux/hppa/kernel-features.h
	[__LINUX_KERNEL_VERSION >= 0x020622] (__ASSUME_ACCEPT4_SYSCALL):
	Define.
 2014-02-20 17:50:31 +00:00
Chris Metcalf
4372980f58 Move tilegx, tilepro, and linux-generic from ports to libc. 
I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy,
along with the linux-generic ports infrastructure.  Beyond the README
update, the move was just

    git mv ports/sysdeps/tile sysdeps/tile
    git mv ports/sysdeps/unix/sysv/linux/tile \
      sysdeps/unix/sysv/linux/tile
    git mv ports/sysdeps/unix/sysv/linux/generic \
      sysdeps/unix/sysv/linux/generic

I updated the relevant ChangeLogs along the lines of the ARM move
in commit c6bfe5c4d75 and tested the 64-bit tilegx build to confirm that
there were no changes in "objdump -dr" output in the shared objects.
 2014-02-10 11:04:39 -05:00