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authorFrederic Weisbecker <fweisbec@gmail.com>2009-11-27 04:55:54 +0100
committerIngo Molnar <mingo@elte.hu>2009-11-27 06:22:59 +0100
commitdd1853c3f493f6d22d9e5390b192a07b73d2ac0a (patch)
treeaf87226bcdc254ce2ab656530263e61f6552322b /samples
parent5fa10b28e57f94a90535cfeafe89dcee9f47d540 (diff)
downloadlinux-2.6.38-lt-ux500-dd1853c3f493f6d22d9e5390b192a07b73d2ac0a.tar.gz
hw-breakpoints: Use struct perf_event_attr to define kernel breakpoints
Kernel breakpoints are created using functions in which we pass breakpoint parameters as individual variables: address, length and type. Although it fits well for x86, this just does not scale across architectures that may support this api later as these may have more or different needs. Pass in a perf_event_attr structure instead because it is meant to evolve as much as possible into a generic hardware breakpoint parameter structure. Reported-by: K.Prasad <prasad@linux.vnet.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1259294154-5197-2-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'samples')
-rw-r--r--samples/hw_breakpoint/data_breakpoint.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/samples/hw_breakpoint/data_breakpoint.c b/samples/hw_breakpoint/data_breakpoint.c
index ee7f9fbaffb..29525500df0 100644
--- a/samples/hw_breakpoint/data_breakpoint.c
+++ b/samples/hw_breakpoint/data_breakpoint.c
@@ -51,13 +51,13 @@ static void sample_hbp_handler(struct perf_event *temp, void *data)
static int __init hw_break_module_init(void)
{
int ret;
- unsigned long addr;
+ DEFINE_BREAKPOINT_ATTR(attr);
- addr = kallsyms_lookup_name(ksym_name);
+ attr.bp_addr = kallsyms_lookup_name(ksym_name);
+ attr.bp_len = HW_BREAKPOINT_LEN_4;
+ attr.bp_type = HW_BREAKPOINT_W | HW_BREAKPOINT_R;
- sample_hbp = register_wide_hw_breakpoint(addr, HW_BREAKPOINT_LEN_4,
- HW_BREAKPOINT_W | HW_BREAKPOINT_R,
- sample_hbp_handler, true);
+ sample_hbp = register_wide_hw_breakpoint(&attr, sample_hbp_handler);
if (IS_ERR(sample_hbp)) {
ret = PTR_ERR(sample_hbp);
goto fail;