1 files changed, 50 insertions, 0 deletions
diff --git a/lib/libc/i386/gen/_ctx_start.S b/lib/libc/i386/gen/_ctx_start.S
new file mode 100644
index 0000000..bfff53a
--- /dev/null
+++ b/lib/libc/i386/gen/_ctx_start.S
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2001 Daniel Eischen <deischen@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Neither the name of the author nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * _ctx_start((void *func)(int arg1, ..., argn),
+ *            int arg1, ..., argn, ucontext_t *ucp)
+ *
+ * 0(%esp)		- func
+ * 4(%esp)		- arg1
+ * 8(%esp)		- arg2
+ * ...
+ * (4*n)(%esp)		- argn
+ * (4*(n + 1))(%esp)	- ucp, %ebp setup to point here (base of stack)
+ */
+ENTRY(_ctx_start)
+	popl	%eax		/* get start function */
+	call	*%eax		/* call start function */
+	movl	%ebp, %esp	/*
+				 * setup stack for completion routine;
+				 * ucp is now at top of stack
+				 */
+	call	_ctx_done	/* should never return */
+	call	abort		/* fubar */
+	ret