Add a weak function for any architecture-specific initialization. ARM
will use this to register the handlers for the undefined instructions it
uses to implement uprobes.
Signed-off-by: Rabin Vincent <ra...@rab.in>
---
include/linux/uprobes.h | 1 +
kernel/events/uprobes.c | 10 ++++++++++
2 files changed, 11 insertions(+)
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index b4380ad..c3dc5de 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -130,6 +130,7 @@ extern int arch_uprobe_exception_notify(struct
notifier_block *self, unsigned l
extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs
*regs);
extern bool __weak arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs
*regs);
extern void __weak arch_uprobe_xol_copy(struct arch_uprobe *auprobe, void
*vaddr);
+extern int __weak arch_uprobes_init(void);
#else /* !CONFIG_UPROBES */
struct uprobes_state {
};
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index f7ff3a4..ca000a9 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1634,8 +1634,14 @@ static struct notifier_block uprobe_exception_nb = {
.priority = INT_MAX-1, /* notified after kprobes, kgdb
*/
};
+int __weak __init arch_uprobes_init(void)
+{
+ return 0;
+}
+
static int __init init_uprobes(void)
{
+ int ret;
int i;
for (i = 0; i < UPROBES_HASH_SZ; i++) {
@@ -1643,6 +1649,10 @@ static int __init init_uprobes(void)
mutex_init(&uprobes_mmap_mutex[i]);
}
+ ret = arch_uprobes_init();
+ if (ret)
+ return ret;
+
return register_die_notifier(&uprobe_exception_nb);
}
module_init(init_uprobes);
--
1.7.9.5
--
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