Update.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* sysdeps/unix/sysv/linux/cris/Dist: New file.
	* sysdeps/unix/sysv/linux/cris/Makefile: New file.
	* sysdeps/unix/sysv/linux/cris/_G_config.h: New file.
	* sysdeps/unix/sysv/linux/cris/bits/fcntl.h: New file.
	* sysdeps/unix/sysv/linux/cris/bits/mman.h: New file.
	* sysdeps/unix/sysv/linux/cris/bits/resource.h: New file.
	* sysdeps/unix/sysv/linux/cris/brk.c: New file.
	* sysdeps/unix/sysv/linux/cris/chown.c: New file.
	* sysdeps/unix/sysv/linux/cris/clone.S: New file.
	* sysdeps/unix/sysv/linux/cris/fchown.c: New file.
	* sysdeps/unix/sysv/linux/cris/fcntl.c: New file.
	* sysdeps/unix/sysv/linux/cris/fxstat.c: New file.
	* sysdeps/unix/sysv/linux/cris/getegid.c: New file.
	* sysdeps/unix/sysv/linux/cris/geteuid.c: New file.
	* sysdeps/unix/sysv/linux/cris/getgid.c: New file.
	* sysdeps/unix/sysv/linux/cris/getgroups.c: New file.
	* sysdeps/unix/sysv/linux/cris/getresgid.c: New file.
	* sysdeps/unix/sysv/linux/cris/getresuid.c: New file.
	* sysdeps/unix/sysv/linux/cris/getrlimit.c: New file.
	* sysdeps/unix/sysv/linux/cris/getrlimit64.c: New file.
	* sysdeps/unix/sysv/linux/cris/getuid.c: New file.
	* sysdeps/unix/sysv/linux/cris/lchown.c: New file.
	* sysdeps/unix/sysv/linux/cris/lockf64.c: New file.
	* sysdeps/unix/sysv/linux/cris/lxstat.c: New file.
	* sysdeps/unix/sysv/linux/cris/mmap.S: New file.
	* sysdeps/unix/sysv/linux/cris/mmap64.S: New file.
	* sysdeps/unix/sysv/linux/cris/msgctl.c: New file.
	* sysdeps/unix/sysv/linux/cris/profil-counter.h: New file.
	* sysdeps/unix/sysv/linux/cris/register-dump.h: New file.
	* sysdeps/unix/sysv/linux/cris/semctl.c: New file.
	* sysdeps/unix/sysv/linux/cris/setegid.c: New file.
	* sysdeps/unix/sysv/linux/cris/seteuid.c: New file.
	* sysdeps/unix/sysv/linux/cris/setfsgid.c: New file.
	* sysdeps/unix/sysv/linux/cris/setfsuid.c: New file.
	* sysdeps/unix/sysv/linux/cris/setgid.c: New file.
	* sysdeps/unix/sysv/linux/cris/setgroups.c: New file.
	* sysdeps/unix/sysv/linux/cris/setregid.c: New file.
	* sysdeps/unix/sysv/linux/cris/setresgid.c: New file.
	* sysdeps/unix/sysv/linux/cris/setresuid.c: New file.
	* sysdeps/unix/sysv/linux/cris/setreuid.c: New file.
	* sysdeps/unix/sysv/linux/cris/setrlimit.c: New file.
	* sysdeps/unix/sysv/linux/cris/setuid.c: New file.
	* sysdeps/unix/sysv/linux/cris/shmctl.c: New file.
	* sysdeps/unix/sysv/linux/cris/socket.S: New file.
	* sysdeps/unix/sysv/linux/cris/sys/ucontext.h: New file.
	* sysdeps/unix/sysv/linux/cris/syscall.S: New file.
	* sysdeps/unix/sysv/linux/cris/sysdep.S: New file.
	* sysdeps/unix/sysv/linux/cris/sysdep.h: New file.
	* sysdeps/unix/sysv/linux/cris/vfork.S: New file.
	* sysdeps/unix/sysv/linux/cris/xstat.c: New file.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* sysdeps/cris/Dist: New file.
	* sysdeps/cris/Implies: New file.
	* sysdeps/cris/Makefile: New file.
	* sysdeps/cris/__longjmp.S: New file.
	* sysdeps/cris/_mcount.S: New file.
	* sysdeps/cris/bits/endian.h: New file.
	* sysdeps/cris/bits/setjmp.h: New file.
	* sysdeps/cris/bits/string.h: New file.
	* sysdeps/cris/dl-machine.h: New file.
	* sysdeps/cris/elf/start.S: New file.
	* sysdeps/cris/machine-gmon.h: New file.
	* sysdeps/cris/memcopy.h: New file.
	* sysdeps/cris/memusage.h: New file.
	* sysdeps/cris/setjmp.S: New file.
	* sysdeps/cris/sysdep.h: New file.
	* sysdeps/cris/wordcopy.c: New file.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* elf/elf.h: Add new relocations for CRIS.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* shlib-versions: Add cases for Linux on CRIS.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* configure.in (ASM_LINE_SEP tests): Handle CRIS assembly, with
	';' for comments and '@' for line separator.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* sysdeps/unix/sysv/linux/hppa/sysdep.h (INLINE_SYSCALL): Fix
	typo; s/==/=/ for assignment.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* malloc/Makefile: Correct comment; mtrace is Perl, not AWK.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* iconv/gconv_simple.c (internal_ucs4_loop_unaligned): Check for
	empty input before checking full output.

2001-04-08  Hans-Peter Nilsson  <hp@axis.com>

	* iconv/gconv.c (__gconv): Don't derefer parameter cd before
	checking if == -1L.

2001-04-08  Ulrich Drepper  <drepper@redhat.com>

	* inet/rexec.c (rexec_af): Avoid calling perror with errno being set.

1 files changed, 99 insertions, 0 deletions

diff --git a/manual/examples/swapcontext.c b/manual/examples/swapcontext.c
new file mode 100644
index 0000000..f733510
--- /dev/null
+++ b/manual/examples/swapcontext.c
@@ -0,0 +1,99 @@
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ucontext.h>
+#include <sys/time.h>
+
+/* Set by the signal handler.  */
+static volatile int expired;
+
+/* The contexts.  */
+static ucontext_t uc[3];
+
+/* We do only a certain number of switches.  */
+static int switches;
+
+
+/* This is the function doing the work.  It is just a
+   skeleton, real code has to be filled in.  */
+static void
+f (int n)
+{
+  int m = 0;
+  while (1)
+    {
+      /* This is where the work would be done.  */
+      if (++m % 100 == 0)
+        {
+          putchar ('.');
+          fflush (stdout);
+        }
+
+      /* Regularly the @var{expire} variable must be checked.  */
+      if (expired)
+        {
+          /* We do not want the program to run forever.  */
+          if (++switches == 20)
+            return;
+
+          printf ("\nswitching from %d to %d\n", n, 3 - n);
+          expired = 0;
+          /* Switch to the other context, saving the current one.  */
+          swapcontext (&uc[n], &uc[3 - n]);
+        }
+    }
+}
+
+/* This is the signal handler which simply set the variable.  */
+void
+handler (int signal)
+{
+  expired = 1;
+}
+
+
+int
+main (void)
+{
+  struct sigaction sa;
+  struct itimerval it;
+  char st1[8192];
+  char st2[8192];
+
+  /* Initialize the data structures for the interval timer.  */
+  sa.sa_flags = SA_RESTART;
+  sigfillset (&sa.sa_mask);
+  sa.sa_handler = handler;
+  it.it_interval.tv_sec = 0;
+  it.it_interval.tv_usec = 1;
+  it.it_value = it.it_interval;
+
+  /* Install the timer and get the context we can manipulate.  */
+  if (sigaction (SIGPROF, &sa, NULL) < 0
+      || setitimer (ITIMER_PROF, &it, NULL) < 0
+      || getcontext (&uc[1]) == -1
+      || getcontext (&uc[2]) == -1)
+    abort ();
+
+  /* Create a context with a separate stack which causes the
+     function @code{f} to be call with the parameter @code{1}.
+     Note that the @code{uc_link} points to the main context
+     which will cause the program to terminate once the function
+     return.  */
+  uc[1].uc_link = &uc[0];
+  uc[1].uc_stack.ss_sp = st1;
+  uc[1].uc_stack.ss_size = sizeof st1;
+  makecontext (&uc[1], (void (*) (void)) f, 1, 1);
+
+  /* Similarly, but @code{2} is passed as the parameter to @code{f}.  */
+  uc[2].uc_link = &uc[0];
+  uc[2].uc_stack.ss_sp = st2;
+  uc[2].uc_stack.ss_size = sizeof st2;
+  makecontext (&uc[2], (void (*) (void)) f, 1, 2);
+
+  /* Start running.  */
+  swapcontext (&uc[0], &uc[1]);
+  putchar ('\n');
+
+  return 0;
+}