diff options
author | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
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committer | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
commit | ed03f430cdc8c802652467e9097606fedc2c7abc (patch) | |
tree | 30941ec1e6f93e99358fefe18175e5dd800a4379 /kernel/kprobes.c | |
parent | ed349a8a0a780ed27e2a765f16cee54d9b63bfee (diff) | |
parent | 6f957eaf79356a32e838f5f262ee9a60544b1d5b (diff) | |
download | op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.zip op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.tar.gz |
Pull pnpacpi into acpica branch
Diffstat (limited to 'kernel/kprobes.c')
-rw-r--r-- | kernel/kprobes.c | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 5beda37..3bb71e6 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -246,6 +246,19 @@ static int __kprobes aggr_break_handler(struct kprobe *p, struct pt_regs *regs) return ret; } +/* Walks the list and increments nmissed count for multiprobe case */ +void __kprobes kprobes_inc_nmissed_count(struct kprobe *p) +{ + struct kprobe *kp; + if (p->pre_handler != aggr_pre_handler) { + p->nmissed++; + } else { + list_for_each_entry_rcu(kp, &p->list, list) + kp->nmissed++; + } + return; +} + /* Called with kretprobe_lock held */ struct kretprobe_instance __kprobes *get_free_rp_inst(struct kretprobe *rp) { @@ -399,10 +412,7 @@ static inline void add_aggr_kprobe(struct kprobe *ap, struct kprobe *p) INIT_LIST_HEAD(&ap->list); list_add_rcu(&p->list, &ap->list); - INIT_HLIST_NODE(&ap->hlist); - hlist_del_rcu(&p->hlist); - hlist_add_head_rcu(&ap->hlist, - &kprobe_table[hash_ptr(ap->addr, KPROBE_HASH_BITS)]); + hlist_replace_rcu(&p->hlist, &ap->hlist); } /* @@ -462,9 +472,16 @@ int __kprobes register_kprobe(struct kprobe *p) int ret = 0; unsigned long flags = 0; struct kprobe *old_p; + struct module *mod; + + if ((!kernel_text_address((unsigned long) p->addr)) || + in_kprobes_functions((unsigned long) p->addr)) + return -EINVAL; + + if ((mod = module_text_address((unsigned long) p->addr)) && + (unlikely(!try_module_get(mod)))) + return -EINVAL; - if ((ret = in_kprobes_functions((unsigned long) p->addr)) != 0) - return ret; if ((ret = arch_prepare_kprobe(p)) != 0) goto rm_kprobe; @@ -488,6 +505,8 @@ out: rm_kprobe: if (ret == -EEXIST) arch_remove_kprobe(p); + if (ret && mod) + module_put(mod); return ret; } @@ -495,6 +514,7 @@ void __kprobes unregister_kprobe(struct kprobe *p) { unsigned long flags; struct kprobe *old_p; + struct module *mod; spin_lock_irqsave(&kprobe_lock, flags); old_p = get_kprobe(p->addr); @@ -506,6 +526,10 @@ void __kprobes unregister_kprobe(struct kprobe *p) cleanup_kprobe(p, flags); synchronize_sched(); + + if ((mod = module_text_address((unsigned long)p->addr))) + module_put(mod); + if (old_p->pre_handler == aggr_pre_handler && list_empty(&old_p->list)) kfree(old_p); |