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authorAnil S Keshavamurthy <anil.s.keshavamurthy@intel.com>2005-06-23 03:09:27 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-23 12:45:22 -0400
commit7213b2521889eb087eed8abaa48d1a692575da3e (patch)
tree8a9a0b5cfaa9824de97d9dae45b20d2a7309db5b /include/asm-ia64/kdebug.h
parent0aa55e4d7db822059fe8132fe9f2b7773c48216c (diff)
[PATCH] Kprobes/IA64: kdebug die notification mechanism
As many of you know that kprobes exist in the main line kernel for various architecture including i386, x86_64, ppc64 and sparc64. Attached patches following this mail are a port of Kprobes and Jprobes for IA64. I have tesed this patches for kprobes and Jprobes and this seems to work fine. I have tested this patch by inserting kprobes on various slots and various templates including various types of branch instructions. I have also tested this patch using the tool http://marc.theaimsgroup.com/?l=linux-kernel&m=111657358022586&w=2 and the kprobes for IA64 works great. Here is list of TODO things and pathes for the same will appear soon. 1) Support kprobes on "mov r1=ip" type of instruction 2) Support Kprobes and Jprobes to exist on the same address 3) Support Return probes 3) Architecture independent cleanup of kprobes This patch adds the kdebug die notification mechanism needed by Kprobes. For break instruction on Branch type slot, imm21 is ignored and value zero is placed in IIM register, hence we need to handle kprobes for switch case zero. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Rusty Lynch <Rusty.lynch@intel.com> From: Rusty Lynch <rusty.lynch@intel.com> At the point in traps.c where we recieve a break with a zero value, we can not say if the break was a result of a kprobe or some other debug facility. This simple patch changes the informational string to a more correct "break 0" value, and applies to the 2.6.12-rc2-mm2 tree with all the kprobes patches that were just recently included for the next mm cut. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-ia64/kdebug.h')
-rw-r--r--include/asm-ia64/kdebug.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/include/asm-ia64/kdebug.h b/include/asm-ia64/kdebug.h
new file mode 100644
index 000000000000..4d376e1663f7
--- /dev/null
+++ b/include/asm-ia64/kdebug.h
@@ -0,0 +1,61 @@
1#ifndef _IA64_KDEBUG_H
2#define _IA64_KDEBUG_H 1
3/*
4 * include/asm-ia64/kdebug.h
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *
20 * Copyright (C) Intel Corporation, 2005
21 *
22 * 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
23 * <anil.s.keshavamurthy@intel.com> adopted from
24 * include/asm-x86_64/kdebug.h
25 */
26#include <linux/notifier.h>
27
28struct pt_regs;
29
30struct die_args {
31 struct pt_regs *regs;
32 const char *str;
33 long err;
34 int trapnr;
35 int signr;
36};
37
38int register_die_notifier(struct notifier_block *nb);
39extern struct notifier_block *ia64die_chain;
40
41enum die_val {
42 DIE_BREAK = 1,
43 DIE_SS,
44 DIE_PAGE_FAULT,
45};
46
47static inline int notify_die(enum die_val val, char *str, struct pt_regs *regs,
48 long err, int trap, int sig)
49{
50 struct die_args args = {
51 .regs = regs,
52 .str = str,
53 .err = err,
54 .trapnr = trap,
55 .signr = sig
56 };
57
58 return notifier_call_chain(&ia64die_chain, val, &args);
59}
60
61#endif