[PATCH] Kprobes: Track kprobe on a per_cpu basis - sparc64 changes

Sparc64 changes to track kprobe execution on a per-cpu basis.  We now track
the kprobe state machine independently on each cpu using an arch specific
kprobe control block.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/include/asm-sparc64/kprobes.h b/include/asm-sparc64/kprobes.h
index a8d326a598f0..7ba845320f5c 100644
--- a/include/asm-sparc64/kprobes.h
+++ b/include/asm-sparc64/kprobes.h
@@ -3,6 +3,7 @@
 
 #include <linux/config.h>
 #include <linux/types.h>
+#include <linux/percpu.h>
 
 typedef u32 kprobe_opcode_t;
 
@@ -18,6 +19,25 @@ struct arch_specific_insn {
 	kprobe_opcode_t insn[MAX_INSN_SIZE];
 };
 
+struct prev_kprobe {
+	struct kprobe *kp;
+	unsigned int status;
+	unsigned long orig_tnpc;
+	unsigned long orig_tstate_pil;
+};
+
+/* per-cpu kprobe control block */
+struct kprobe_ctlblk {
+	unsigned long kprobe_status;
+	unsigned long kprobe_orig_tnpc;
+	unsigned long kprobe_orig_tstate_pil;
+	long *jprobe_saved_esp;
+	struct pt_regs jprobe_saved_regs;
+	struct pt_regs *jprobe_saved_regs_location;
+	struct sparc_stackf jprobe_saved_stack;
+	struct prev_kprobe prev_kprobe;
+};
+
 #ifdef CONFIG_KPROBES
 extern int kprobe_exceptions_notify(struct notifier_block *self,
 				    unsigned long val, void *data);