Update.

	* sysdeps/unix/sysv/linux/i386/getcontext.S: Don't touch the %gs
	register so that contexts can be used in different threads.
	* sysdeps/unix/sysv/linux/i386/setcontext.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/swapcontext.S: Likewise.

5 files changed, 20 insertions, 20 deletions

diff --git a/ChangeLog b/ChangeLog
index bca582b887..cc01d033d9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2001-07-31  Ulrich Drepper  <drepper@redhat.com>
 
+	* sysdeps/unix/sysv/linux/i386/getcontext.S: Don't touch the %gs
+	register so that contexts can be used in different threads.
+	* sysdeps/unix/sysv/linux/i386/setcontext.S: Likewise.
+	* sysdeps/unix/sysv/linux/i386/swapcontext.S: Likewise.
+
 	* sysdeps/unix/sysv/linux/cmsg_nxthdr.c (__cmsg_nxthdr): Correct
 	test for cmsg struct size.
 	* sysdeps/unix/sysv/linux/bits/socket.h (__cmsg_nxthdr): Likewise.
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog
index b4c51749ef..0969bd3abf 100644
--- a/linuxthreads/ChangeLog
+++ b/linuxthreads/ChangeLog
@@ -1,5 +1,8 @@
 2001-07-31  Ulrich Drepper  <drepper@redhat.com>
 
+	* tst-context.c (threadfct): Initialize context before calling
+	makecontext.
+
 	* Examples/ex17.c: Make sure test thread is around long enough.
 
 2001-07-26  kaz Kojima  <kkojima@rr.iij4u.or.jp>
diff --git a/sysdeps/unix/sysv/linux/i386/getcontext.S b/sysdeps/unix/sysv/linux/i386/getcontext.S
index ddc0f6f117..600a886863 100644
--- a/sysdeps/unix/sysv/linux/i386/getcontext.S
+++ b/sysdeps/unix/sysv/linux/i386/getcontext.S
@@ -43,13 +43,11 @@ ENTRY(__getcontext)
 	movl	%ecx, oESP(%eax)
 	movl	%ebx, oEBX(%eax)
 
-	/* Save the FS and GS segment register.  */
+	/* Save the FS segment register.  We don't touch the GS register
+	   since it is used for threads.  */
 	xorl	%edx, %edx
-	xorl	%ecx, %ecx
-	movw	%gs, %dx
-	movw	%fs, %cx
-	movl	%edx, oGS(%eax)
-	movl	%ecx, oFS(%eax)
+	movw	%fs, %dx
+	movl	%edx, oFS(%eax)
 
 	/* We have separate floating-point register content memory on the
 	   stack.  We use the __fpregs_mem block in the context.  Set the
diff --git a/sysdeps/unix/sysv/linux/i386/setcontext.S b/sysdeps/unix/sysv/linux/i386/setcontext.S
index 985212310e..58a122fc28 100644
--- a/sysdeps/unix/sysv/linux/i386/setcontext.S
+++ b/sysdeps/unix/sysv/linux/i386/setcontext.S
@@ -48,10 +48,9 @@ ENTRY(__setcontext)
 	movl	oFPREGS(%eax), %ecx
 	fldenv	(%ecx)
 
-	/* Restore the FS and GS segment registers.  */
-	movl	oGS(%eax), %edx
+	/* Restore the FS segment register.  We don't touch the GS register
+	   since it is used for threads.  */
 	movl	oFS(%eax), %ecx
-	movw	%dx, %gs
 	movw	%cx, %fs
 
 	/* Load the new stack pointer.  */
diff --git a/sysdeps/unix/sysv/linux/i386/swapcontext.S b/sysdeps/unix/sysv/linux/i386/swapcontext.S
index a8481b2924..0c249437a5 100644
--- a/sysdeps/unix/sysv/linux/i386/swapcontext.S
+++ b/sysdeps/unix/sysv/linux/i386/swapcontext.S
@@ -43,13 +43,10 @@ ENTRY(__swapcontext)
 	movl	%ecx, oESP(%eax)
 	movl	%ebx, oEBX(%eax)
 
-	/* Save the FS and GS segment register.  */
+	/* Save the FS segment register.  */
 	xorl	%edx, %edx
-	xorl	%ecx, %ecx
-	movw	%gs, %dx
-	movw	%fs, %cx
-	movl	%edx, oGS(%eax)
-	movl	%ecx, oFS(%eax)
+	movw	%fs, %dx
+	movl	%edx, oFS(%eax)
 
 	/* We have separate floating-point register content memory on the
 	   stack.  We use the __fpregs_mem block in the context.  Set the
@@ -81,11 +78,9 @@ ENTRY(__swapcontext)
 	movl	oFPREGS(%eax), %ecx
 	fldenv	(%ecx)
 
-	/* Restore the FS and GS segment registers.  */
-	movl	oGS(%eax), %edx
-	movl	oFS(%eax), %ecx
-	movw	%dx, %gs
-	movw	%cx, %fs
+	/* Restore the FS segment registers.  */
+	movl	oFS(%eax), %edx
+	movw	%dx, %fs
 
 	/* Load the new stack pointer.  */
 	movl	oESP(%eax), %ecx