Update and correct SPARC configuration for supported socket syscalls (bug 23848).

Looking at kernel-features.h files, I saw that SPARC was missing full
information on when it gained separate socket syscalls.

This patch adds such information to the SPARC kernel-features.h.  It
also corrects what appear to be bugs in the existing code (that would
cause syscalls to be assumed to be present when not actually present).
Various __ASSUME_* macros, defined by default, were not undefined for
32-bit despite those syscalls only being added for 32-bit in Linux
4.4.  Some syscalls were used in the SPARC64 syscalls.list but only
added in 4.4; this was harmless before the __NR_* macros were defined
at all, but once the macros were defined it means a build with
post-4.4 headers would assume the syscalls to be present regardless of
--enable-kernel version.  Then, various __ASSUME_* macros were
previously not defined in cases where they could be defined (this part
of the patch is just an optimization, not a bug fix).

Note the observation in a comment in the patch that even the latest
Linux kernel for SPARC does not have getpeername and getsockname
syscalls in the compat syscall table for 32-bit binaries on 64-bit
kernels (so glibc can't assume those syscalls to be present for 32-bit
at all, although the 32-bit syscall table gained them in 4.4).

Tested (compilation only) for SPARC with build-many-glibcs.py.

	[BZ #23848]
	* sysdeps/unix/sysv/linux/sparc/kernel-features.h [!__arch64__ &&
	__LINUX_KERNEL_VERSION < 0x040400] (__ASSUME_SENDMSG_SYSCALL):
	Undefine.
	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
	(__ASSUME_RECVMSG_SYSCALL): Likewise.
	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
	(__ASSUME_SENDTO_SYSCALL): Likewise.
	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
	(__ASSUME_ACCEPT_SYSCALL): Undefine under this condition, not just
	[!__arch64__].
	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
	(__ASSUME_CONNECT_SYSCALL): Likewise.
	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
	(__ASSUME_RECVFROM_SYSCALL): Likewise.
	[__LINUX_KERNEL_VERSION >= 0x040400] (__ASSUME_BIND_SYSCALL):
	Define.
	[__LINUX_KERNEL_VERSION >= 0x040400] (__ASSUME_LISTEN_SYSCALL):
	Likewise.
	[__LINUX_KERNEL_VERSION >= 0x040400]
	(__ASSUME_SETSOCKOPT_SYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list (bind):
	Remove.
	(listen): Likewise.
	(setsockopt): Likewise.

1 files changed, 28 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 67abf144c9..96f6ce52d8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,31 @@
+2018-11-01  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #23848]
+	* sysdeps/unix/sysv/linux/sparc/kernel-features.h [!__arch64__ &&
+	__LINUX_KERNEL_VERSION < 0x040400] (__ASSUME_SENDMSG_SYSCALL):
+	Undefine.
+	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
+	(__ASSUME_RECVMSG_SYSCALL): Likewise.
+	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
+	(__ASSUME_SENDTO_SYSCALL): Likewise.
+	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
+	(__ASSUME_ACCEPT_SYSCALL): Undefine under this condition, not just
+	[!__arch64__].
+	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
+	(__ASSUME_CONNECT_SYSCALL): Likewise.
+	[!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400]
+	(__ASSUME_RECVFROM_SYSCALL): Likewise.
+	[__LINUX_KERNEL_VERSION >= 0x040400] (__ASSUME_BIND_SYSCALL):
+	Define.
+	[__LINUX_KERNEL_VERSION >= 0x040400] (__ASSUME_LISTEN_SYSCALL):
+	Likewise.
+	[__LINUX_KERNEL_VERSION >= 0x040400]
+	(__ASSUME_SETSOCKOPT_SYSCALL): Likewise.
+	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list (bind):
+	Remove.
+	(listen): Likewise.
+	(setsockopt): Likewise.
+
 2018-11-01  Fredrik Noring  <noring@nocrew.org>
 
 	* sysdeps/mips/sys/tas.h (_test_and_set): Handle the R5900 CPU