Merge stack(9) implementations for i386 and amd64 under x86/.

Reviewed by:	jhb, kib
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D3255

2 files changed, 162 insertions, 0 deletions

diff --git a/sys/x86/include/stack.h b/sys/x86/include/stack.h
new file mode 100644
index 0000000..8e45b82
--- /dev/null
+++ b/sys/x86/include/stack.h
@@ -0,0 +1,58 @@
+/*-
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _X86_STACK_H
+#define	_X86_STACK_H
+
+/*
+ * Stack trace.
+ */
+
+#ifdef __i386__
+struct i386_frame {
+	struct i386_frame	*f_frame;
+	u_int			f_retaddr;
+	u_int			f_arg0;
+};
+#endif
+
+#ifdef __amd64__
+struct amd64_frame {
+	struct amd64_frame	*f_frame;
+	u_long			f_retaddr;
+	u_long			f_arg0;
+};
+
+struct i386_frame {
+	uint32_t		f_frame;
+	uint32_t		f_retaddr;
+	uint32_t		f_arg0;
+};
+#endif /* __amd64__ */
+
+#endif /* !_X86_STACK_H */
diff --git a/sys/x86/x86/stack_machdep.c b/sys/x86/x86/stack_machdep.c
new file mode 100644
index 0000000..3ebf5a9
--- /dev/null
+++ b/sys/x86/x86/stack_machdep.c
@@ -0,0 +1,104 @@
+/*-
+ * Copyright (c) 2005 Antoine Brodin
+ * 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. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/stack.h>
+
+#include <x86/stack.h>
+
+#include <machine/pcb.h>
+
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+#include <vm/pmap.h>
+
+#ifdef __i386__
+#define	PCB_FP(pcb)	((pcb)->pcb_ebp)
+#define	TF_FP(tf)	((tf)->tf_ebp)
+#define	TF_PC(tf)	((tf)->tf_eip)
+
+typedef struct i386_frame *x86_frame_t;
+#else
+#define	PCB_FP(pcb)	((pcb)->pcb_rbp)
+#define	TF_FP(tf)	((tf)->tf_rbp)
+#define	TF_PC(tf)	((tf)->tf_rip)
+
+typedef struct amd64_frame *x86_frame_t;
+#endif
+
+static void
+stack_capture(struct thread *td, struct stack *st, register_t fp)
+{
+	x86_frame_t frame;
+	vm_offset_t callpc;
+
+	stack_zero(st);
+	frame = (x86_frame_t)fp;
+	while (1) {
+		if (!INKERNEL((long)frame))
+			break;
+		callpc = frame->f_retaddr;
+		if (!INKERNEL(callpc))
+			break;
+		if (stack_put(st, callpc) == -1)
+			break;
+		if (frame->f_frame <= frame ||
+		    (vm_offset_t)frame->f_frame >= td->td_kstack +
+		    td->td_kstack_pages * PAGE_SIZE)
+			break;
+		frame = frame->f_frame;
+	}
+}
+
+void
+stack_save_td(struct stack *st, struct thread *td)
+{
+
+	if (TD_IS_SWAPPED(td))
+		panic("stack_save_td: swapped");
+	if (TD_IS_RUNNING(td))
+		panic("stack_save_td: running");
+
+	stack_capture(td, st, PCB_FP(td->td_pcb));
+}
+
+void
+stack_save(struct stack *st)
+{
+	register_t fp;
+
+#ifdef __i386__
+	__asm __volatile("movl %%ebp,%0" : "=g" (fp));
+#else
+	__asm __volatile("movq %%rbp,%0" : "=g" (fp));
+#endif
+	stack_capture(curthread, st, fp);
+}