Commit Graph

5 Commits

Author SHA1 Message Date
Masami Hiramatsu
f438d914b2 kprobes: support kretprobe blacklist
Introduce architecture dependent kretprobe blacklists to prohibit users
from inserting return probes on the function in which kprobes can be
inserted but kretprobes can not.

This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and
registers "__switch_to" to the blacklist on x86-64, because that mark is to
prohibit user from inserting only kretprobe.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 09:43:10 -07:00
Christoph Hellwig
74a0b57627 x86: optimize page faults like all other achitectures and kill notifier cruft
x86(-64) are the last architectures still using the page fault notifier
cruft for the kprobes page fault hook.  This patch converts them to the
proper direct calls, and removes the now unused pagefault notifier bits
aswell as the cruft in kprobes.c that was related to this mess.

I know Andi didn't really like this, but all other architecture maintainers
agreed the direct calls are much better and besides the obvious cruft
removal a common way of dealing with kprobes across architectures is
important aswell.

[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix sparc64]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Andi Kleen <ak@suse.de>
Cc: <linux-arch@vger.kernel.org>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 09:42:50 -07:00
Peter Zijlstra
58dfe883d3 lockdep: annotate kprobes irq fiddling
kprobes disables irqs for jprobes, but does not tell lockdep about it.

This resolves this warning during an allyesconfig bzImage bootup test:

 [  423.670337] WARNING: at kernel/lockdep.c:2658 check_flags()
 [  423.670341]  [<c0107f01>] show_trace_log_lvl+0x19/0x2e
 [  423.670348]  [<c0107ffa>] show_trace+0x12/0x14
 [  423.670350]  [<c0108010>] dump_stack+0x14/0x16
 [  423.670353]  [<c015249d>] check_flags+0x95/0x142
 [  423.670357]  [<c0155576>] lock_acquire+0x52/0xb8
 [  423.670360]  [<c1313c90>] _spin_lock+0x2e/0x58
 [  423.670365]  [<c11b72f9>] jtcp_rcv_established+0x6e/0x189
 [  423.670369]  [<c11810da>] tcp_v4_do_rcv+0x30b/0x620
 [  423.670373]  [<c1181c8c>] tcp_v4_rcv+0x89d/0x8fa
 [  423.670376]  [<c1167dba>] ip_local_deliver+0x17d/0x225
 [  423.670380]  [<c11682f5>] ip_rcv+0x493/0x4ce
 [  423.670383]  [<c11177ef>] netif_receive_skb+0x347/0x365
 [  423.670388]  [<c07b6e7b>] nv_napi_poll+0x501/0x6c3
 [  423.670393]  [<c1115b1a>] net_rx_action+0xa3/0x1b6
 [  423.670396]  [<c013bdee>] __do_softirq+0x76/0xfb
 [  423.670400]  [<c0109189>] do_softirq+0x75/0xf3

[ akpm: checkpatch.pl cleanups ]

Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2007-10-11 22:25:25 +02:00
Dave Jones
835c34a168 Delete filenames in comments.
Since the x86 merge, lots of files that referenced their own filenames
are no longer correct.  Rather than keep them up to date, just delete
them, as they add no real value.

Additionally:
- fix up comment formatting in scx200_32.c
- Remove a credit from myself in setup_64.c from a time when we had no SCM
- remove longwinded history from tsc_32.c which can be figured out from
  git.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-13 10:01:23 -07:00
Thomas Gleixner
250c22777f x86_64: move kernel
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-11 11:17:24 +02:00