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ftrace: support for PowerPC

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This patch adds full support for ftrace for PowerPC (both 64 and 32 bit).
This includes dynamic tracing and function filtering.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Steven Rostedt
2008-05-14 23:49:44 -04:00
committed by Thomas Gleixner
parent e0eca07bad
commit 4e491d14f2
11 changed files with 405 additions and 10 deletions
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11
kernel/trace/trace_selftest.c
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@@ -123,6 +123,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
int ret;
int save_ftrace_enabled = ftrace_enabled;
int save_tracer_enabled = tracer_enabled;
char *func_name;
/* The ftrace test PASSED */
printk(KERN_CONT "PASSED\n");
@@ -142,9 +143,15 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
return ret;
}
/*
* Some archs *cough*PowerPC*cough* add charachters to the
* start of the function names. We simply put a '*' to
* accomodate them.
*/
func_name = "*" STR(DYN_FTRACE_TEST_NAME);
/* filter only on our function */
ftrace_set_filter(STR(DYN_FTRACE_TEST_NAME),
sizeof(STR(DYN_FTRACE_TEST_NAME)), 1);
ftrace_set_filter(func_name, strlen(func_name), 1);
/* enable tracing */
tr->ctrl = 1;