This patch removes the socket.S implementation for all ports and replace
it by a C implementation using socketcall. For ports that implement
the syscall directly, there is no change.
The patch idea is to simplify the socket function implementation that
uses the socketcall to be based on C implemetation instead of a pseudo
assembly implementation with arch specific parts. The patch then remove
the assembly implementatation for the ports which uses socketcall
(i386, microblaze, mips, powerpc, sparc, m68k, s390 and sh).
I have cross-build GLIBC for afore-mentioned ports and tested on both
i386 and ppc32 without regressions.
The current scheme to identify which module a translation unit is
built in depends on defining multiple macros IS_IN_* and also defining
NOT_IN_libc if we're building a non-libc module. In addition, there
is an IN_LIB macro that does effectively the same thing, but for
different modules (notably the systemtap probes). This macro scheme
unifies both ideas to use just one macro IN_MODULE and assign it a
value depending on the module it is being built into. If the module
is not defined, it defaults to MODULE_libc.
Patches that follow will replace uses of IS_IN_* variables with the
IS_IN() macro. libc-symbols.h has been converted already to give an
example of how such a transition will look.
Verified that there are no relevant binary changes. One source change
that will crop up repeatedly is that of nscd_stat, since it uses the
build timestamp as a constant in its logic.
* Makeconfig (in-module): Get value of libof set for the
translation unit.
(CPPFLAGS): Use $(in-module).
* Makerules: Don't suffix routine names for nonlib.
* include/libc-modules.h: New file.
* include/libc-symbols.h: Include libc-modules.h
(IS_IN): New macro to replace IS_IN_* macros.
* elf/Makefile: Set libof-* for each routine.
* elf/rtld-Rules: Likewise.
* extra-modules.mk: Likewise.
* iconv/Makefile: Likewise.
* iconvdata/Makefile: Likewise.
* locale/Makefile: Likewise.
* malloc/Makefile: Likewise.
* nss/Makefile: Likewise.
* sysdeps/gnu/Makefile: Likewise.
* sysdeps/ieee754/ldbl-opt/Makefile: Likewise.
* sysdeps/unix/sysv/linux/Makefile: Likewise.
* sysdeps/s390/s390-64/Makefile: Likewise.
* nscd/Makefile: Set libof-* for each routine. Set CFLAGS and
CPPFLAGS for nscd instead of nonlib.
The generated header is compiled with `-ffreestanding' to avoid any
circular dependencies against the installed implementation headers.
Such a dependency would require the implementation header to be
installed before the generated header could be built (See bug 15711).
In current practice the generated header dependencies do not include
any of the implementation headers removed by the use of `-ffreestanding'.
---
2013-07-15 Carlos O'Donell <carlos@redhat.com>
[BZ #15711]
* sysdeps/unix/sysv/linux/Makefile ($(objpfx)bits/syscall%h):
Avoid system header dependency with -ffreestanding.
($(objpfx)bits/syscall%d): Likewise.
Whenever getaddrinfo needed network interface information it used the
netlink interface to read the information every single time. The
problem is that this information can change at any time.
The patch implements monitoring of the network interfaces through
nscd. If no change is detected the previously read information can
be reused (which is the norm). This timestamp information is also
made available to other processes using the shared memory segment
between nscd and those processes.
nscd can clear caches when certain files change. The list of files
was hardcoded so far and worked for nss_files and nss_dns and those
modules which need no monitoring. nss_db, for instance, has its
own set of files to monitor. Now the NSS modules themselves can
request that certain files are monitored.
The getcwd syscall (so far?) can only handle path up to one page
in size. There is no limit about directory hierarchy depth, though,
and the POSIX getcwd is supposed to handle this. In that case fall
back to the generic getcwd.
Additionally, optimize the generic getcwd to use openat when possible
to change the asymptotic performance from O(N^2) to O(n).
The ntp_gettime implementation of NTP exports the tai field the kernel
now produces. This requires an ABI change since the ntptimeval structure
changed. Upstream kept the same name, there is nothing to do. This
patch changes the ntptimeval structure but keeps the old ntp_gettime
definition. A new ntp_gettimex function which is transparently invoked
through the old name is introduced. This has the advantage that even
object files can remain compatible. This wouldn't be the case if
symbol versioning would be used to overload the name ntp_gettime.
* sysdeps/unix/sysv/linux/fallocate64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/fallocate64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/fallocate.c: New file.
* sysdeps/unix/sysv/linux/i386/fallocate64.c: New file.
* sysdeps/unix/sysv/linux/i386/fallocate.c: New file.
* sysdeps/unix/sysv/linux/Versions: Export fallocate and fallocate64
for GLIBC_2.10.
* sysdeps/unix/sysv/linux/Makefile [subdir=io] (sysdep_routines):
Add fallocate and fallocate64.
* io/fcntl.h: Pretty printing.
fields.
* nscd/connections.c (inotify_fd): New variable.
(nscd_init): Try to open an inotify descriptor.
If successful, watch files for databases using inotify instead of
having prune threads stat the files.
(nscd_run_prune): Recognize clear_cache flag being set and call
prune_cache appropriately.
(main_loop_poll): Add inotify descriptor to wait set and handle the
reported changes.
(main_loop_epoll): Likewise.
* nscd/cache.c (prune_cache): Don't stat files for databases if
inotify is used.
* sysdeps/unix/sysv/linux/Makefile [subdir=nscd]
(CFLAGS-connections.c): Add -DHAVE_INOTIFY.
* sysdeps/unix/sysv/linux/open64_2.c: ...here. New file.
* sysdeps/unix/sysv/linux/Makefile [subdir=io] (sysdep_routines): Add
open64_2.
* sysdeps/unix/sysv/linux/ia64/syscalls.list: Add open and creat
entries.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list: Likewise.
* sysdeps/wordsize-64/alphasort.c: New file.
* sysdeps/wordsize-64/alphasort64.c: New file.
* sysdeps/wordsize-64/fseeko.c: New file.
* sysdeps/wordsize-64/fseeko64.c: New file.
* sysdeps/wordsize-64/ftello.c: New file.
* sysdeps/wordsize-64/ftello64.c: New file.
* sysdeps/wordsize-64/ftw.c: New file.
* sysdeps/wordsize-64/ftw64.c: New file.
* sysdeps/wordsize-64/iofgetpos.c: New file.
* sysdeps/wordsize-64/iofgetpos64.c: New file.
* sysdeps/wordsize-64/iofopen.c: New file.
* sysdeps/wordsize-64/iofopen64.c: New file.
* sysdeps/wordsize-64/iofsetpos.c: New file.
* sysdeps/wordsize-64/iofsetpos64.c: New file.
* sysdeps/wordsize-64/lockf.c: New file.
* sysdeps/wordsize-64/lockf64.c: New file.
* sysdeps/wordsize-64/mkostemp.c: New file.
* sysdeps/wordsize-64/mkostemp64.c: New file.
* sysdeps/wordsize-64/mkstemp.c: New file.
* sysdeps/wordsize-64/mkstemp64.c: New file.
* sysdeps/wordsize-64/scandir.c: New file.
* sysdeps/wordsize-64/scandir64.c: New file.
* sysdeps/wordsize-64/tmpfile.c: New file.
* sysdeps/wordsize-64/tmpfile64.c: New file.
* sysdeps/wordsize-64/versionsort.c: New file.
* sysdeps/wordsize-64/versionsort64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/aio_read.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/aio_read64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/aio_write.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/aio_write64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/creat64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/getdirentries.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/getdirentries64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/lio_listio.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/lio_listio64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/open64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/openat.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/openat64.c: New file.
* crypt/sha256-crypt.c: Fix a comment.
* crypt/sha512-crypt.c: Likewise.
* sysdeps/unix/sysv/linux/signalfd.c: New file.
* sysdeps/unix/sysv/linux/sys/signalfd.h: New file.
* sysdeps/unix/sysv/linux/Versions: Export signalfd for GLIBC_2.7.
