Update.

2001-03-16  David Mosberger  <davidm@hpl.hp.com>

	* sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h (struct sigcontext):
	Drop hack that was needed for 2.1.1 kernel headers.

	* sysdeps/unix/sysv/linux/ia64/ucontext_i.h: New file.

	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h: Rewrite to make it
	overlay with kernel's "struct sigcontext".

	* sysdeps/unix/sysv/linux/ia64/Makefile (sysdep_headers): Add
	sys/rse.h for "misc" subdir.
	(sysdep_routines): Add __start_context for "stdlib" subdir.

	* sysdeps/unix/sysv/linux/ia64/sys/rse.h: New file (based on
	kernel file of the same name).

	* stdlib/Makefile (tests): Add tst-setcontext.
	* stdlib/tst-setcontext.c: New file (based on a sample program by
	Uli Drepper).

	* sysdeps/unix/sysv/linux/ia64/setcontext.S: New file.
	* sysdeps/unix/sysv/linux/ia64/getcontext.S: New file.
	* sysdeps/unix/sysv/linux/ia64/__start_context.S: New file.
	* sysdeps/unix/sysv/linux/ia64/makecontext.c: New file.

	* sysdeps/unix/sysv/linux/ia64/__longjmp.S (__longjmp): Use extr.u
	instead of shift & and.

1 files changed, 51 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/ia64/__start_context.S b/sysdeps/unix/sysv/linux/ia64/__start_context.S
new file mode 100644
index 0000000000..c21b4cf33a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/__start_context.S
@@ -0,0 +1,51 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+#include <features.h>
+
+/* When a context set up by __makecontext() is activated, control
+   transfers to __start_context.  When we get here:
+
+	b1 = entry point of function to call
+	in0 = address of UCP to resume after function returns
+	in1 = global pointer for __start_context
+	out0 .. outN = arguments for function  */
+
+ENTRY(__start_context)
+	.prologue
+	alloc r2 = ar.pfs, 2, 0, 8, 0
+
+	.save rp, r4		// terminate call chain with a NULL rp
+	mov r4 = r0
+	;;
+
+	.body
+	br.call.sptk rp = b1
+1:
+	mov gp = in1			// restore gp
+	cmp.ne p6,p0 = in0, r0		// uc_link != 0 ?
+	;;
+(p6)	mov out0 = in0
+(p6)	br.call.sptk rp = __setcontext
+.Lexit:
+	mov out0 = 0
+	br.call.sptk rp = exit
+
+1:	br.cond.sptk .Lexit
+END(__start_context)