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ftrace: store mcount address in rec->ip

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Record the address of the mcount call-site. Currently all archs except sparc64
record the address of the instruction following the mcount call-site. Some
general cleanups are entailed. Storing mcount addresses in rec->ip enables
looking them up in the kprobe hash table later on to check if they're kprobe'd.

Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Cc: davem@davemloft.net
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Abhishek Sagar
2008-06-21 23:47:27 +05:30
committed by Ingo Molnar
parent f34bfb1bee
commit 395a59d0f8
19 changed files with 111 additions and 57 deletions
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3
kernel/trace/ftrace.c
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@@ -27,6 +27,8 @@
#include <linux/hash.h>
#include <linux/list.h>
#include <asm/ftrace.h>
#include "trace.h"
/* ftrace_enabled is a method to turn ftrace on or off */
@@ -329,7 +331,6 @@ ftrace_record_ip(unsigned long ip)
}
#define FTRACE_ADDR ((long)(ftrace_caller))
#define MCOUNT_ADDR ((long)(mcount))
static int
__ftrace_replace_code(struct dyn_ftrace *rec,