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>
Signed-off-by: David A. Long <dave.l...@linaro.org>
---
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 2a0aa10..e5a9bfb 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -135,6 +135,7 @@ 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 64471bd..5004f6f 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1862,8 +1862,14 @@ 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++)
@@ -1872,6 +1878,10 @@ static int __init init_uprobes(void)
if (percpu_init_rwsem(&dup_mmap_sem))
return -ENOMEM;
+ ret = arch_uprobes_init();
+ if (ret)
+ return ret;
+
return register_die_notifier(&uprobe_exception_nb);
}
module_init(init_uprobes);
--
1.8.1.2
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