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authorAnanth N Mavinakayanahalli <ananth@in.ibm.com>2005-11-07 01:00:07 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:45 -0800
commite65845235c8120be63001fc1a4ac00c819194bbe (patch)
tree209a081cc07375290743ceb45f52dc474f45382a /include/linux/kprobes.h
parent66ff2d0691e00e1e7bfdf398a970310c9a0fe671 (diff)
downloadop-kernel-dev-e65845235c8120be63001fc1a4ac00c819194bbe.zip
op-kernel-dev-e65845235c8120be63001fc1a4ac00c819194bbe.tar.gz
[PATCH] Kprobes: Track kprobe on a per_cpu basis - base changes
Changes to the base kprobe infrastructure to track kprobe execution on a per-cpu basis. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/kprobes.h')
-rw-r--r--include/linux/kprobes.h31
1 files changed, 22 insertions, 9 deletions
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index e30afdc..6720305 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -33,6 +33,7 @@
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/smp.h>
+#include <linux/percpu.h>
#include <asm/kprobes.h>
@@ -106,6 +107,9 @@ struct jprobe {
kprobe_opcode_t *entry; /* probe handling code to jump to */
};
+DECLARE_PER_CPU(struct kprobe *, current_kprobe);
+DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
+
#ifdef ARCH_SUPPORTS_KRETPROBES
extern void arch_prepare_kretprobe(struct kretprobe *rp, struct pt_regs *regs);
#else /* ARCH_SUPPORTS_KRETPROBES */
@@ -146,13 +150,6 @@ struct kretprobe_instance {
void lock_kprobes(void);
void unlock_kprobes(void);
-/* kprobe running now on this CPU? */
-static inline int kprobe_running(void)
-{
- extern unsigned int kprobe_cpu;
- return kprobe_cpu == smp_processor_id();
-}
-
extern int arch_prepare_kprobe(struct kprobe *p);
extern void arch_copy_kprobe(struct kprobe *p);
extern void arch_arm_kprobe(struct kprobe *p);
@@ -167,6 +164,22 @@ extern void free_insn_slot(kprobe_opcode_t *slot);
struct kprobe *get_kprobe(void *addr);
struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk);
+/* kprobe_running() will just return the current_kprobe on this CPU */
+static inline struct kprobe *kprobe_running(void)
+{
+ return (__get_cpu_var(current_kprobe));
+}
+
+static inline void reset_current_kprobe(void)
+{
+ __get_cpu_var(current_kprobe) = NULL;
+}
+
+static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
+{
+ return (&__get_cpu_var(kprobe_ctlblk));
+}
+
int register_kprobe(struct kprobe *p);
void unregister_kprobe(struct kprobe *p);
int setjmp_pre_handler(struct kprobe *, struct pt_regs *);
@@ -183,9 +196,9 @@ void add_rp_inst(struct kretprobe_instance *ri);
void kprobe_flush_task(struct task_struct *tk);
void recycle_rp_inst(struct kretprobe_instance *ri);
#else /* CONFIG_KPROBES */
-static inline int kprobe_running(void)
+static inline struct kprobe *kprobe_running(void)
{
- return 0;
+ return NULL;
}
static inline int register_kprobe(struct kprobe *p)
{
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