glibc/sysdeps/unix/sysv/linux
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
..
aarch64 Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
alpha Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
arm Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
bits Combine __USE_BSD and __USE_SVID into __USE_MISC. 2014-02-12 23:41:01 +00:00
generic Move tilegx, tilepro, and linux-generic from ports to libc. 2014-02-10 11:04:39 -05:00
i386 Fix __ASSUME_ACCEPT4 issues (bug 16609). 2014-02-20 17:50:31 +00:00
ia64 Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
m68k Fix __ASSUME_ACCEPT4 issues (bug 16609). 2014-02-20 17:50:31 +00:00
microblaze Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
mips Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
net Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
netash Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
netatalk Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
netax25 Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
neteconet Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
netinet Combine __USE_BSD and __USE_SVID into __USE_MISC. 2014-02-12 23:41:01 +00:00
netipx Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
netiucv Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
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netrom Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
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nfs
powerpc Combine __USE_BSD and __USE_SVID into __USE_MISC. 2014-02-12 23:41:01 +00:00
s390 Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
scsi Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sh Restore ucontext ABI for soft-float sh4. 2014-01-24 12:56:12 +09:00
sparc Combine __USE_BSD and __USE_SVID into __USE_MISC. 2014-02-12 23:41:01 +00:00
sys ptrace.h: add __ prefix to ptrace_peeksiginfo_args 2014-01-06 08:07:33 -05:00
tile Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
wordsize-64 Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
x86 Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
x86_64 Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
Implies
Makefile
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a.out.h
accept.S
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configure tst-fanotify: switch to AC_DEFINE 2014-01-04 08:34:01 -05:00
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dl-sbrk.c
dl-sysdep.c Revert "Patch [1/4] async-signal safe TLS." 2014-02-06 08:46:20 +10:00
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internal_accept4.S Fix __ASSUME_ACCEPT4 issues (bug 16609). 2014-02-20 17:50:31 +00:00
internal_recvmmsg.S Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
internal_sendmmsg.S
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internal_statvfs64.c
ipc_priv.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
kernel-features.h Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
kernel-posix-cpu-timers.h
kernel_sigaction.h
kernel_stat.h
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ldd-rewrite.sed
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listen.S
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local-setxid.h
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openat64.c
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pwritev64.c
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readdir64.c
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recv.S
recvfrom.S
recvmmsg.c Fix __ASSUME_RECVMMSG issues (bug 16610). 2014-02-20 17:53:08 +00:00
recvmsg.S
remove.c
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sa_len.c
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segfault.c
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send.S
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sendmsg.S
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shm_unlink.c
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shmctl.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
shmdt.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
shmget.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
shutdown.S
sigaction.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
siglist.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
signal.c
signalfd.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigpending.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigprocmask.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigqueue.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigreturn.c
sigset-cvt-mask.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigstack.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigsuspend.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigtimedwait.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigwait.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sigwaitinfo.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sizes.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sleep.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
socketcall.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
socketpair.S
speed.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
statfs64.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
statvfs.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
statvfs64.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
symlinkat.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
sync_file_range.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
syscalls.list
sysconf.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sysctl.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sysctl.mk
syslog.c
system.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tcdrain.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tcflow.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tcflush.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tcgetattr.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
tcgetpgrp.c
tcsendbrk.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tcsetattr.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tcsetpgrp.c
termio.h
testrtsig.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
time.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
times.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
timespec_get.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
truncate64.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tst-clone.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tst-fanotify.c tst-fanotify: switch to AC_DEFINE 2014-01-04 08:34:01 -05:00
tst-getcpu.c
ttyname.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
ttyname_r.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
ualarm.c
umount.S
umount2.S
unlinkat.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
unlockpt.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
updwtmp.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
usleep.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
ustat.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
utimensat.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
utimes.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
utmp_file.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
vfork.c
wait.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
wait3.c Flatten sysdeps/unix/bsd/bsd4.4 into sysdeps/unix/bsd. 2013-12-22 14:49:48 +00:00
waitid.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
waitpid.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
writev.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
xmknod.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
xmknodat.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
xstat.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
xstat64.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
xstatconv.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
xstatconv.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00