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[PATCH] Kprobes: Track kprobe on a per_cpu basis - x86_64 changes

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x86_64 changes to track kprobe execution on a per-cpu basis.  We now track the
kprobe state machine independently on each cpu using a 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>
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 01:00:12 -08:00
committed by Linus Torvalds
parent f215d985e9
commit e7a510f92c
2 changed files with 89 additions and 59 deletions
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include/asm-x86_64/kprobes.h
+19
View File
@@ -25,6 +25,7 @@
*/
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/percpu.h>
struct pt_regs;
@@ -48,6 +49,24 @@ struct arch_specific_insn {
kprobe_opcode_t *insn;
};
struct prev_kprobe {
struct kprobe *kp;
unsigned long status;
unsigned long old_rflags;
unsigned long saved_rflags;
};
/* per-cpu kprobe control block */
struct kprobe_ctlblk {
unsigned long kprobe_status;
unsigned long kprobe_old_rflags;
unsigned long kprobe_saved_rflags;
long *jprobe_saved_rsp;
struct pt_regs jprobe_saved_regs;
kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
struct prev_kprobe prev_kprobe;
};
/* trap3/1 are intr gates for kprobes. So, restore the status of IF,
* if necessary, before executing the original int3/1 (trap) handler.
*/