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[PATCH] Kprobes: Track kprobe on a per_cpu basis - base changes

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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>
This commit is contained in:
Ananth N Mavinakayanahalli
2005-11-07 01:00:07 -08:00
committed by Linus Torvalds
parent 66ff2d0691
commit e65845235c
2 changed files with 50 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
include/linux/kprobes.h
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@@ -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)
{