utimes: Export utimensat based utimes

sys/time.h has libc_hidden_proto(utimes) which generates the hidden
"__GI_utimes" symbol reference, and common/utimes.c has a
libc_hidden_def(utimes) which generates the exported "utimes" alias.

As part of no-legacy-syscall kernel ABI, Commit 80dc2ed05
"utimes: Use utimensat if arch does not have the utimes syscall"
introduced a new wrapper, but missed the corresponding libc_hidden_def,
causing Busybox (1.20.0) link to fail (for ARC).

Also don't generate a STUB, in that case.
---------------->8-------------------
....
touch.c:(.text.touch_main+0xdc): undefined reference to `utimes'
touch.c:(.text.touch_main+0x114): undefined reference to `utimes'
libbb/lib.a(copy_file.o): In function `copy_file':
copy_file.c:(.text.copy_file+0x446): undefined reference to `utimes'
collect2: ld returned 1 exit status
---------------->8-------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

LT{,.old}: include stddef.h for size_t

A user application built with -D_POSIX_C_SOURCE=200112L and
 #include signal.h, yields following compilation error:

------------------->8-----------------------------
arc-linux-uclibc-gcc -D_POSIX_C_SOURCE=200112L hello.c
In file included from
/opt/INSTALL/lib/gcc/arc-linux-uclibc/4.4.7/../../../../arc-linux-uclibc/sys-include/signal.h:429,
                 from hello.c:1:
/opt/INSTALL/lib/gcc/arc-linux-uclibc/4.4.7/../../../../arc-linux-uclibc/sys-include/bits/pthreadtypes.h:48:
error: expected specifier-qualifier-list before 'size_t'
------------------->8-----------------------------

The fix is to make sure size_t is explicitly provided to pthreadtype.h

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: Add missing $(SYMBOL_PREFIX) to symbol names

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libpthread: Remove useless .cvsignore files

Signed-off-by: Markos Chandras <hwoarang@gentoo.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

nptl/allocatestack.c: Fix stack mprotect alignment for STACK_GROWS_UP

mprotect() expects the first argument to be aligned to a page boundary.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/pause: Enable pause_nocancel for arches without __NR_pause

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

nice: fix overflow checking in int_add_no_wrap()

In C, signed integer overflow is undefined behavior.  Many compilers
optimize away checks like `a + b < a'.

Use safe precondition testing instead.

Signed-off-by: Xi Wang <xi@mit.edu>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

inet: remove noreturn attribute from res_nclose

Partially revert e9af4dfbd328e9f3bba235fdb2d1027dd2dbbcde

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

scripts: remove CVS header from getent

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/ipc: Allow architectures to define their own __IPC_64 macro

New architectures don't define ARCH_WANT_IPC_PARSE_VERSION in their kernel.
This means that every cmd passed to semctl,msgctl and shmctl is IPC_64 by
default. For these architectures we need to define __IPC_64 as 0. Existing
architectures are not affected by this change.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

ldso: Use newer syscalls if arch does not have the deprecated syscalls

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

open: Use openat if arch does not have the open syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

not-cancel.h: Use openat if arch does not have the open syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

open64: Use openat if arch does not have the open syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

fcntl: Use fcntl64 is arch does not have the fcntl syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

fstatfs64: Prefer fstatfs64 system call instead of __libc_fstatfs

Using __libc_fstatfs for fstatfs64 adds a small delay as it needs to
use a 32-bit data structure to get the file info and them pass them to
the 64-bit data structure which was given as a fstatfs64 argument. Using
the system call directly should make the entire process much faster.
Also fix the arguments for fstatfs64. It takes three arguments
(see fs/fstatfs.c in Linux kernel sources) so despite what the manpage
says, the size of the buffer needs to be passed as the second argument

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

fstatfs: Add __libc_fstatfs wrapper

New architectures don't have fstatfs anymore, so we use a wrapper for
__libc_fstatfs which will use fstatfs64 internally. The interface however
needs to remain the same (i.e accepting a struct statfs as a second
argument) for backwards compatibility

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stat: Use fstatat64 if arch does not have the stat syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

ustat: Add ustat stub for arches that don't have the ustat system call

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

lstat64: Use fstatat64 if arch does not have the lstat64 syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

lstat: Use fstatat64 if arch does not have the lstat syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stat64: Use fstatat64 if arch does not have the stat64 syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

fstatat{64}: No conversion code is needed for new architectures

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

fstatat64: Use newfstatat only for 64-bit operations

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

fstatat: Use newfstatat only for 64-bit operations

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

fstat: Use fstat64 if arch does not have the fstat syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/statfs64: Skip conversion code for new architectures

Fixes the following tests in LTP

statfs02_64 ( test case #5 )

The purpose of this test is to pass an invalid pointer to the statfs64
syscall and check if the kernel returns EFAULT or not. However,
uClibc creates a new statfs struct which is then passed to the kernel.
As a result of which, the kernel returns 0 because the newly created
statfs structure is valid. But, when copying the contens of the new
pointer to the old userspace one, the uClibc segfauls because the old
pointer is invalid. Old architectures are doomed to suffer by this
problem but new architectures can use the statfs64 syscall directly
so that the userspace pointer is passed directly to the kernel and get
the correct errno at the end.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

statfs: Use statfs64 if arch does not have the statfs syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

getdents: Use getdents64 if arch does not have the getdents syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

lseek: Use lseek64 is arch does not have the lseek syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

sendfile: Use sendfile64 if arch does not have the sendfile syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

truncate: Use truncate64 if arch does not have the truncate syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

ftruncate: Use ftruncate64 if arch does not have the ftruncate syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

fork: Use clone if arch does not have the fork syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

vfork: Use clone if arch does not have the vfork syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

utime: Use utimensat if arch does not have the utime syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

inotify_init: Use inotify_init1 if inotify_init syscall is not defined

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

epoll: Use epoll_pwait if arch does not have the epoll_wait syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

epoll: Use epoll_create1 if arch does not have the epoll_create syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

pipe: Use pipe2 if arch does not have the pipe syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

utimes: Use utimensat if arch does not have the utimes syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

symlink: Use symlinkat if arch does not have the symlink syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

readlink: Use readlinkat if arch does not have the readlink syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

rename: Use renameat if arch does not have the rename syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

mkdir: Use mkdirat if arch does not have the mkdir syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

lchown: Use fchownat if arch does not have the lchown syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

rmdir: Use unlinkat if arch does not have the rmdir syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

chown: Use fchownat if arch does not have the chown syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

mknod: Use mknodat if arch does not have the mknod syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

unlink: Use unlinkat if arch does not have the unlink syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

link: Use linkat if arch does not have the link syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

access: Use faccessat if arch does not have the access syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

chmod: Use fchmodat if arch does not have the chmod syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

dup2: Use dup3 if arch does not have the dup2 syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Makefile.in: Use non-legacy interfaces for new architectures

New architectures, which don't define ARCH_HAS_DEPRECATED syscalls, need
to use the new interfaces from libc/sysdeps/linux/generic-syscalls/bits/

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Config.in: Introduce symbol for arches with deprecated syscalls

Linuxthreads(old and new) need deprecated syscalls to build. Existing
architectures support these system calls but new architectures don't.
This symbol has no functional change apart from hidding the Linuxthreads
symbols from arches that don't support them.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/sysdeps: Add new interfaces for new architectures

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: add non standard execvpe function

Signed-off-by: Henning Heinold <heinold@inf.fu-berlin.de>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/{arm, i386}/Makefile.arch: Don't build 64-bit code if LFS is disabled

Fixes the following compilation error:

_lfs_64.h: # error Do not include this header in files not built when LFS is disabled

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stdlib: Fix fndecl of mkostemp, mkostemp64

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

test: run test{,_glibc} adjacent

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: add posix_fallocate()

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: switch warning into a TODO

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: Fix kbuild-style switch fallout

regressions introduced in 1b3025b7352f5e432ffa1c7adc57085ac9092b77
"buildsys: switch libc to kbuild-style"

unistd: Handle !UCLIBC_HAS_GET{, SUB}OPT cases

libc/libc_so.a(getsubopt-susv3.os): In function getsubopt':
getsubopt-susv3.c:(.text+0x0): multiple definition of getsubopt'
libc/libc_so.a(getsubopt.os):getsubopt.c:(.text+0x0):
first defined here.

The solution is to filter out the correct files when
UCLIBC_HAS_GETOPT and UCLIBC_HAS_GETSUBOPT are not defined.

inet: Move INET_RPC_{DIR, OUT} before CSRC_ALL

libc/libc_so.a(rpc_thread.oS): In function __rpc_thread_svc_max_pollfd':
rpc_thread.c:(.text+0x148): undefined reference to svc_max_pollfd'
libc/libc_so.a(rpc_thread.oS): In function __rpc_thread_svc_pollfd':
rpc_thread.c:(.text+0x184): undefined reference to svc_pollfd'

The CSRC_ALL variable uses the INET_RPC_DIR variable which is
initialized later on. We fix this problem by moving the
INET_RCP_{DIR,OUT} definitions before we use them in CSRC_ALL

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

mman: rename MAP_UNINITIALIZE to MAP_UNINITIALIZED

The name was changed to include a trailing 'D' when it went into the
kernel.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: switch libc to kbuild-style

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libpthread: Fix handling of SUBARCH includes

TARGET_SUBARCH can only ever be set if TARGET_ARCH is set.
Only include SUBARCH includes if SUBARCH is non-empty.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: atexit: reuse free slots at the end of exit functions table

Continuosly dlopen and dlclose of shared object will cause a memory leak
in atexit function. This fix reuse free slots at the end of the list.

For further detail see https://bugs.busybox.net/show_bug.cgi?id=2455

Signed-off-by: Ronald Wahl <ronald.wahl@raritan.com>
Tested-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

libc/inet: pull in stddef.h for NULL

Fixes a build error:
In file included from libc/inet/recv.c:8:0:
libc/inet/socketcalls.c: In function '__recv_nocancel':
libc/inet/socketcalls.c:203:57: error: 'NULL' undeclared (first use in this function)

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libc/sysdeps: sync bits/in.h with glibc

URL: https://bugs.busybox.net/show_bug.cgi?id=5888
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

buildsys: gen_bits_syscall_h: do not leave undefined SYS_xxx around

If we end up doing '#undef __NR_xxx', we don't want to leave the
corresponding SYS_xxx symbol defined.  So undef it too.

For example, with the ARM EABI layer, we have a bunch of legacy
syscalls that we define early on and then later undefine (such
as __NR_utime).  But we left SYS_utime defined so code that tests
for that define before using it would be broken (since it'd be
defined to a non-existent symbol).

URL: https://bugs.gentoo.org/425006
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

buildsys: gen_bits_syscall_h: clean up script

Just style changes here to make it more readable.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

buildsys: gen_bits_syscall_h: remove top_builddir references

This script hasn't used this var in a while (it writes to stdout), so
drop all mention/usage of it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

buildsys: allow the toolchain to search its dirs for kernel headers

Setting KERNEL_HEADERS up to the exact path all the time is a pita,
especially when the toolchain is often times already configured to
do the right thing.  So if the user has set that to "", don't force
any specific paths.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

buildsys: clean up path scrubbing a bit

This just makes it easier to read -- no functional changes.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libc/sysdeps: dup3: fix typo in comment

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libc: fix typo in statvfs

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: fix typo in statvfs

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

mount.h: update

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

statfs: towards _STATFS_F_FLAGS

preparatory work.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

statfs: support f_frsize

closes bugzilla #5834

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

socket.h: pull socket_type.h from eglibc

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

config: improve help of UCLIBC_HAS_RESOLVER_SUPPORT

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: link libgcc_eh if DODEBUG

with -O0 we (e.g. lockf) might end up with references to
_Unwind_Resume, so pull in gcc_eh in this case..

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

getpwnam: hide relocation

The non-reentrant version of getpwnam is used in the RPC code (for
!HAS_REENTRANT_RPC)

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

LT.old: reinstate build

As noted by Florian Fainelli:
  LD libpthread-0.9.34-git.so
libpthread/linuxthreads.old/libpthread_so.a(wrapsyscall.oS): In function `fcntl64':
wrapsyscall.c:(.text+0xd8): undefined reference to `__libc_fcntl64'
libpthread/linuxthreads.old/libpthread_so.a(wrapsyscall.oS): In function `lseek64':
wrapsyscall.c:(.text+0x190): undefined reference to `__libc_lseek64'
libpthread/linuxthreads.old/libpthread_so.a(wrapsyscall.oS): In function `pread64':
wrapsyscall.c:(.text+0x39c): undefined reference to `__libc_pread64'

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: use kbuild style, fix omission

forgot this hunk in d0234b16d61f06b2a3fd6241eff8c81250283a60

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: use kbuild style

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: remove superfluous default n

kconfig's default defaults to n so spelling out default n is redundant

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: add {get,set,swap,make}context user context manipulation functions

Add the obsolescent SUSv3 family of user context manipulating functions
for arm, i386, mips, x86_64.

Signed-off-by: Timon ter Braak <timonterbraak@gmail.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

dl: fix dlsym lookups with RTLD_NEXT

The current code for dlsym() when invoked with RTLD_NEXT lookup
searches for the module where it's being called from, and executes the
_dl_find_hash only for the next module in the chain. However, if the
looked symbol is not there, the rest of the modules are not checked.

Generally this is not a problem as symbols are merged for the parent
modules; so this affects only RTLD_NEXT.

This patch adds a loop iterating through all the following modules.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Reviewed-by: Filippo ARCIDIACONO <filippo.arcidiacono@st.com>
Tested-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: prevent make from searching for .config

Fixes:
make distclean
mkdir /.config
make -C test/API clean
Reading makefile `../../.config' (search path) (don't care) (no ~ expansion)...
make: *** ../../.config: Is a directory.  Stop.

write(1, "Reading makefile `../../.config'"..., 80) = 80
open("../../.config", O_RDONLY)         = -1 ENOENT (No such file or directory)
open("/usr/include/../../.config", O_RDONLY) = 6
fstat(6, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
read(6, 0x7f2fe3bfc000, 4096)           = -1 EISDIR (Is a directory)

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

arm: workaround GCC PR target/53735 with fork()

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: handle sync_file_range

Add cancellation and support arm, ppc64, mips32.
Compile-tested.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

arm: clone: restore stack pointer just after return from syscall

If the syscall returns with an error the stack pointer and r4 register
are not restored because the instruction 'ldmnefd sp!, {r4}' is executed
after branching to '__error' label.
This bug has been spotted out by running './utstest clone 5' from LTP
built with -fstack-protector-all compiler flag as log below:

root@cortex-a9:/usr/tests/ltp/testcases/bin# ./utstest clone 5
stack smashing detected: ./utstest terminated()

Regression introduced by commit e58798e107d652644629a1daaa95d76430808d53

Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Giuseppe Di Giore <giuseppe.di-giore@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

xtensa: fix setjmp that didn't save all registers correctly

Setjmp was only saving the lower order of registers (a0-a3) correctly, but
not the higher ones (a4-a8/a12).
The change also includes additional information, and renames many of the
registers, so that setjmp and longjmp look more like the inverse of
each other.

Signed-off-by: Chris Zankel <chris@zankel.net>

sched.h: include stdlib.h for malloc/free

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

update ptrace.h to latest from glibc

Update libc/sysdeps/linux/common/sys/ptrace.h to latest from glibc's
sysdeps/unix/sysv/linux/sys/ptrace.h.

This adds definitions for operations:
 - PTRACE_GETREGSET
 - PTRACE_SETREGSET
 - PTRACE_SEIZE
 - PTRACE_INTERRUPT
 - PTRACE_LISTEN

And adds flags:
 - PTRACE_SEIZE_DEVEL

And adds event codes:
 - PTRACE_EVENT_SECCOMP

This is to allow access to the generic interface for accessing
architecture specific regsets using the corresponding NT_* types,
required for new Linux kernel architecture ports.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libc/stdlib: localize __unix_grantpt

When ASSUME_DEVPTS is disabled, we end up exporting __unix_grantpt and
get a reloc to it from grantpt.  Mark it static to fix all of that.

Reported-by: Michael Deutschmann <michael@talamasca.ocis.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

drop support for pre ISO-C compilers

This drops __signed, __volatile, and __const.  Only the latter was
used in the code base, and for uClibc, not consistently.  Much of
the code used plain "const" which meant "__const" was useless.

Really, the point of this is to stay in sync with what glibc did.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>