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authorFrederic Weisbecker <fweisbec@gmail.com>2010-04-22 05:05:45 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2010-05-01 04:32:07 +0200
commit73266fc1df2f94cf72b3beba3eee3b88ed0b0664 (patch)
tree876f6ab9c85715665e5c5562d70d9ea2c10facea /include
parentd00a47cce569a3e660a8c9de5d57af28d6a9f0f7 (diff)
hw-breakpoints: Tag ptrace breakpoint as exclude_kernel
Tag ptrace breakpoints with the exclude_kernel attribute set. This will make it easier to set generic policies on breakpoints, when it comes to ensure nobody unpriviliged try to breakpoint on the kernel. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Cc: K. Prasad <prasad@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/hw_breakpoint.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/hw_breakpoint.h b/include/linux/hw_breakpoint.h
index c70d27af03f..a0aa5a9cfb0 100644
--- a/include/linux/hw_breakpoint.h
+++ b/include/linux/hw_breakpoint.h
@@ -34,6 +34,12 @@ static inline void hw_breakpoint_init(struct perf_event_attr *attr)
attr->sample_period = 1;
}
+static inline void ptrace_breakpoint_init(struct perf_event_attr *attr)
+{
+ hw_breakpoint_init(attr);
+ attr->exclude_kernel = 1;
+}
+
static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
{
return bp->attr.bp_addr;