GNU C Library master sources branch, master, updated. glibc-2.16-ports-merge-44-g07cbfc2

[tschwinge at sourceware dot org]

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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=07cbfc23683827c1b92d0bc62b15a77a48b09a17

commit 07cbfc23683827c1b92d0bc62b15a77a48b09a17
Author: Thomas Schwinge <thomas@codesourcery.com>
Date:   Tue Jul 17 10:06:06 2012 +0200

    SH: makecontext: exit (0) if uc_link is the null pointer.

diff --git a/ChangeLog b/ChangeLog
index 9c2930f..751b596 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2012-07-17  Thomas Schwinge  <thomas@codesourcery.com>
 
+	* sysdeps/unix/sysv/linux/sh/makecontext.S (.Lexitcode): Preserve
+	zero value for regular exit case.
+
 	* sysdeps/unix/sysv/linux/x86_64/__start_context.S
 	(__start_context): Preserve zero value for regular exit case.
 
diff --git a/sysdeps/unix/sysv/linux/sh/makecontext.S b/sysdeps/unix/sysv/linux/sh/makecontext.S
index a04bc9f..73fca8b 100644
--- a/sysdeps/unix/sysv/linux/sh/makecontext.S
+++ b/sysdeps/unix/sysv/linux/sh/makecontext.S
@@ -128,6 +128,7 @@ ENTRY(__makecontext)
 	cfi_restore (pr)
 	/* If this returns (which can happen if the syscall fails) we'll exit
 	   the program with the return error value (-1).  */
+	mov	r0, r4
 
 2:
 	mov.l	.Lexit, r1
@@ -135,7 +136,7 @@ ENTRY(__makecontext)
 	add	r12, r1
 #endif
 	jsr	@r1
-	 mov	r0, r4
+	 nop
 	/* The 'exit' call should never return.  In case it does cause the
 	   process to terminate.  */
 	ABORT_INSTRUCTION_ASM

http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=f7db31703ab2e11b162d4e0e3b4af0c1c971b6cd

commit f7db31703ab2e11b162d4e0e3b4af0c1c971b6cd
Author: Thomas Schwinge <thomas@codesourcery.com>
Date:   Tue Jul 17 10:06:02 2012 +0200

    x86_64: makecontext: exit (0) if uc_link is the null pointer.

diff --git a/ChangeLog b/ChangeLog
index fce4617..9c2930f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,9 @@
 2012-07-17  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/x86_64/__start_context.S
+	(__start_context): Preserve zero value for regular exit case.
+
+2012-07-17  Thomas Schwinge  <thomas@codesourcery.com>
 	    Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
 
 	* manual/setjmp.texi (setcontext): Clarify normal process
diff --git a/sysdeps/unix/sysv/linux/x86_64/__start_context.S b/sysdeps/unix/sysv/linux/x86_64/__start_context.S
index 77d322e..9f2ee23 100644
--- a/sysdeps/unix/sysv/linux/x86_64/__start_context.S
+++ b/sysdeps/unix/sysv/linux/x86_64/__start_context.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Andreas Jaeger <aj@suse.de>, 2002.
 
@@ -39,8 +39,9 @@ ENTRY(__start_context)
 	call	JUMPTARGET(__setcontext)
 	/* If this returns (which can happen if the syscall fails) we'll
 	   exit the program with the return error value (-1).  */
+	movq	%rax,%rdi
 
-2:	movq	%rax,%rdi
+2:
 	call	HIDDEN_JUMPTARGET(exit)
 	/* The 'exit' call should never return.  In case it does cause
 	   the process to terminate.  */

http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=dc97c227c95dd521594f1eaa472399b9fba03b2a

commit dc97c227c95dd521594f1eaa472399b9fba03b2a
Author: Thomas Schwinge <thomas@codesourcery.com>
Date:   Tue Jul 17 10:05:55 2012 +0200

    setcontext: Clarify termination when uc_link is the null pointer.

diff --git a/ChangeLog b/ChangeLog
index f6c1cc5..fce4617 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2012-07-17  Thomas Schwinge  <thomas@codesourcery.com>
+	    Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
+
+	* manual/setjmp.texi (setcontext): Clarify normal process
+	termination when uc_link is the null pointer.
+	* stdlib/tst-makecontext.c (cf): Exercise this: remove explicit
+	exit call.
+
 2012-07-16  Andreas Schwab  <schwab@linux-m68k.org>
 
 	* stdlib/bug-getcontext.c (do_test): Don't test FE_ALL_EXCEPT in
diff --git a/manual/setjmp.texi b/manual/setjmp.texi
index a5a7ce6..f13ac7b 100644
--- a/manual/setjmp.texi
+++ b/manual/setjmp.texi
@@ -354,7 +354,8 @@ specified parameters passed.  If this function returns execution is
 resumed in the context which was referenced by the @code{uc_link}
 element of the context structure passed to @code{makecontext} at the
 time of the call.  If @code{uc_link} was a null pointer the application
-terminates in this case.
+terminates normally with an exit status value of @code{EXIT_SUCCESS}
+(@pxref{Program Termination}).
 
 Since the context contains information about the stack no two threads
 should use the same context at the same time.  The result in most cases
diff --git a/stdlib/tst-makecontext.c b/stdlib/tst-makecontext.c
index 3185900..eb6e89b 100644
--- a/stdlib/tst-makecontext.c
+++ b/stdlib/tst-makecontext.c
@@ -35,7 +35,9 @@ cf (int i)
       printf ("i %d thr %d\n", i, thr);
       exit (1);
     }
-  exit (0);
+
+  /* Since uc_link below has been set to NULL, setcontext is supposed to
+     terminate the process normally after this function returns.  */
 }
 
 int

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                        |   16 ++++++++++++++++
 manual/setjmp.texi                               |    3 ++-
 stdlib/tst-makecontext.c                         |    4 +++-
 sysdeps/unix/sysv/linux/sh/makecontext.S         |    3 ++-
 sysdeps/unix/sysv/linux/x86_64/__start_context.S |    5 +++--
 5 files changed, 26 insertions(+), 5 deletions(-)


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