always assume tgkill is present

We do not support 2.4 Linux kernels anyway, and almost
all newer 2.6 kernels should have tgkill syscall.

Cleanup the raise situation, pt-raise.c is unused, sync
raise.c with latest GNU libc.

Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>

libc/sysdeps/linux/common/bits/kernel-features.h

@@ -382,18 +382,6 @@
 # define __ASSUME_CORRECT_SI_PID	1
 #endif
 
-/* The tgkill syscall was instroduced for i386 in 2.5.75.  For Alpha
-   it was introduced in 2.6.0-test1 which unfortunately cannot be
-   distinguished from 2.6.0.  On x86-64, ppc, and ppc64 it was
-   introduced in 2.6.0-test3. */
-#if (__LINUX_KERNEL_VERSION >= 132427 && defined __i386__) \
-    || (__LINUX_KERNEL_VERSION >= 132609 && defined __alpha__) \
-    || (__LINUX_KERNEL_VERSION >= 132609 && defined __x86_64__) \
-    || (__LINUX_KERNEL_VERSION >= 132609 && defined __powerpc__) \
-    || (__LINUX_KERNEL_VERSION >= 132609 && defined __sh__)
-# define __ASSUME_TGKILL	1
-#endif
-
 /* The utimes syscall has been available for some architectures
    forever.  For x86 it was introduced after 2.5.75, for x86-64,
    ppc, and ppc64 it was introduced in 2.6.0-test3.  */

libpthread/nptl/allocatestack.c

@@ -996,18 +996,8 @@ setxid_signal_thread (struct xid_command *cmdp, struct pthread *t)
 
   int val;
   INTERNAL_SYSCALL_DECL (err);
-#if defined (__ASSUME_TGKILL) && __ASSUME_TGKILL
   val = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid),
 			  t->tid, SIGSETXID);
-#else
-# ifdef __NR_tgkill
-  val = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid),
-			  t->tid, SIGSETXID);
-  if (INTERNAL_SYSCALL_ERROR_P (val, err)
-      && INTERNAL_SYSCALL_ERRNO (val, err) == ENOSYS)
-# endif
-    val = INTERNAL_SYSCALL (tkill, err, 2, t->tid, SIGSETXID);
-#endif
 
   /* If this failed, it must have had not started yet or else exited.  */
   if (!INTERNAL_SYSCALL_ERROR_P (val, err))

libpthread/nptl/pthread_cancel.c

@@ -75,20 +75,9 @@ pthread_cancel (
 	     a signal handler.  But this is no allowed, pthread_cancel
 	     is not guaranteed to be async-safe.  */
 	  int val;
-#if defined(__ASSUME_TGKILL) && __ASSUME_TGKILL
 	  val = INTERNAL_SYSCALL (tgkill, err, 3,
 				  THREAD_GETMEM (THREAD_SELF, pid), pd->tid,
 				  SIGCANCEL);
-#else
-# ifdef __NR_tgkill
-	  val = INTERNAL_SYSCALL (tgkill, err, 3,
-				  THREAD_GETMEM (THREAD_SELF, pid), pd->tid,
-				  SIGCANCEL);
-	  if (INTERNAL_SYSCALL_ERROR_P (val, err)
-	      && INTERNAL_SYSCALL_ERRNO (val, err) == ENOSYS)
-# endif
-	    val = INTERNAL_SYSCALL (tkill, err, 2, pd->tid, SIGCANCEL);
-#endif
 
 	  if (INTERNAL_SYSCALL_ERROR_P (val, err))
 	    result = INTERNAL_SYSCALL_ERRNO (val, err);

libpthread/nptl/sysdeps/pthread/createthread.c

@@ -105,13 +105,9 @@ do_clone (struct pthread *pd, const struct pthread_attr *attr,
 		 send it the cancellation signal.  */
 	      INTERNAL_SYSCALL_DECL (err2);
 	    err_out:
-#if defined (__ASSUME_TGKILL) && __ASSUME_TGKILL
 	      (void) INTERNAL_SYSCALL (tgkill, err2, 3,
 				       THREAD_GETMEM (THREAD_SELF, pid),
 				       pd->tid, SIGCANCEL);
-#else
-	      (void) INTERNAL_SYSCALL (tkill, err2, 2, pd->tid, SIGCANCEL);
-#endif
 
 	      return (INTERNAL_SYSCALL_ERROR_P (res, err)
 		      ? INTERNAL_SYSCALL_ERRNO (res, err)

libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.commonarch

@@ -95,7 +95,6 @@ endif
 
 libpthread-a-y += $(if $(DOPIC),$(libpthread_linux_OBJS:.o=.os),$(libpthread_linux_OBJS))
 libpthread-so-y += $(libpthread_linux_OBJS:.o=.oS)
-libpthread-so-y += $(libpthread_linux_OUT)/pt-raise.oS
 
 libc_linux_OBJS := $(libc_linux_arch_OBJS)
 libc_linux_OBJS += $(patsubst %.c,$(libpthread_linux_OUT)/%.o,$(libc_linux_CSRC))

libpthread/nptl/sysdeps/unix/sysv/linux/pt-raise.c

@@ -1,51 +0,0 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <errno.h>
-#include <signal.h>
-#include <sysdep.h>
-#include <tls.h>
-#include <bits/kernel-features.h>
-
-
-int
-raise (
-     int sig)
-{
-#if (defined(__ASSUME_TGKILL) && __ASSUME_TGKILL) || defined __NR_tgkill
-  /* raise is an async-safe function.  It could be called while the
-     fork function temporarily invalidated the PID field.  Adjust for
-     that.  */
-  pid_t pid = THREAD_GETMEM (THREAD_SELF, pid);
-  if (__builtin_expect (pid < 0, 0))
-    pid = -pid;
-#endif
-
-#if defined(__ASSUME_TGKILL) && __ASSUME_TGKILL
-  return INLINE_SYSCALL (tgkill, 3, pid, THREAD_GETMEM (THREAD_SELF, tid),
-			 sig);
-#else
-# ifdef __NR_tgkill
-  int res = INLINE_SYSCALL (tgkill, 3, pid, THREAD_GETMEM (THREAD_SELF, tid),
-			    sig);
-  if (res != -1 || errno != ENOSYS)
-    return res;
-# endif
-  return INLINE_SYSCALL (tkill, 2, THREAD_GETMEM (THREAD_SELF, tid), sig);
-#endif
-}

libpthread/nptl/sysdeps/unix/sysv/linux/pthread_kill.c

@@ -58,18 +58,8 @@ __pthread_kill (
      fork, it would have to happen in a signal handler.  But this is
      no allowed, pthread_kill is not guaranteed to be async-safe.  */
   int val;
-#if defined(__ASSUME_TGKILL) && __ASSUME_TGKILL
   val = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid),
 			  tid, signo);
-#else
-# ifdef __NR_tgkill
-  val = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid),
-			  tid, signo);
-  if (INTERNAL_SYSCALL_ERROR_P (val, err)
-      && INTERNAL_SYSCALL_ERRNO (val, err) == ENOSYS)
-# endif
-    val = INTERNAL_SYSCALL (tkill, err, 2, tid, signo);
-#endif
 
   return (INTERNAL_SYSCALL_ERROR_P (val, err)
 	  ? INTERNAL_SYSCALL_ERRNO (val, err) : 0);

libpthread/nptl/sysdeps/unix/sysv/linux/raise.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2016 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -21,17 +21,13 @@
 #include <signal.h>
 #include <sysdep.h>
 #include <pthreadP.h>
-#include <bits/kernel-features.h>
 
 
 int
-raise (
-     int sig)
+raise (int sig)
 {
   struct pthread *pd = THREAD_SELF;
-#if (defined(__ASSUME_TGKILL) && __ASSUME_TGKILL) || defined __NR_tgkill
   pid_t pid = THREAD_GETMEM (pd, pid);
-#endif
   pid_t selftid = THREAD_GETMEM (pd, tid);
   if (selftid == 0)
     {
@@ -44,30 +40,17 @@ raise (
 #endif
       THREAD_SETMEM (pd, tid, selftid);
 
-#if (defined(__ASSUME_TGKILL) && __ASSUME_TGKILL) || defined __NR_tgkill
       /* We do not set the PID field in the TID here since we might be
 	 called from a signal handler while the thread executes fork.  */
       pid = selftid;
-#endif
     }
-#if (defined(__ASSUME_TGKILL) && __ASSUME_TGKILL) || defined __NR_tgkill
   else
     /* raise is an async-safe function.  It could be called while the
        fork/vfork function temporarily invalidated the PID field.  Adjust for
        that.  */
     if (__builtin_expect (pid <= 0, 0))
       pid = (pid & INT_MAX) == 0 ? selftid : -pid;
-#endif
 
-#if defined(__ASSUME_TGKILL) && __ASSUME_TGKILL
   return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
-#else
-# ifdef __NR_tgkill
-  int res = INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
-  if (res != -1 || errno != ENOSYS)
-    return res;
-# endif
-  return INLINE_SYSCALL (tkill, 2, selftid, sig);
-#endif
 }
 libc_hidden_def (raise)

libpthread/nptl/sysdeps/xtensa/Makefile.arch

@@ -15,8 +15,6 @@
 # License along with the GNU C Library; see the file COPYING.LIB.  If
 # not, see <http://www.gnu.org/licenses/>.
 
-CFLAGS-pt-raise.c = -DNOT_IN_libc -DIS_IN_libpthread
-
 ASFLAGS-dl-tlsdesc.S = -DNOT_IN_libc=1
 ASFLAGS-pthread_spin_lock.S = -DNOT_IN_libc -DIS_IN_libpthread
 ASFLAGS-pthread_spin_trylock.S = -DNOT_IN_libc -DIS_IN_libpthread