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[PATCH] Kprobes: Track kprobe on a per_cpu basis - i386 changes

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I386 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 <[email protected]>
Signed-off-by: Anil S Keshavamurthy <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ananth N Mavinakayanahalli 2005-11-07 01:00:08 -08:00 • committed by Linus Torvalds
commit 9a0e3a8683
2 changed files with 86 additions and 57 deletions
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17
include/asm-i386/kprobes.h
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@ -49,6 +49,23 @@ struct arch_specific_insn {
kprobe_opcode_t insn[MAX_INSN_SIZE];
};
struct prev_kprobe {
struct kprobe *kp;
unsigned long status;
unsigned long old_eflags;
unsigned long saved_eflags;
};
/* per-cpu kprobe control block */
struct kprobe_ctlblk {
unsigned long kprobe_status;
unsigned long kprobe_old_eflags;
unsigned long kprobe_saved_eflags;
long *jprobe_saved_esp;
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.