Messages in this thread Patch in this message |  | | From | David Long <> | Subject | [PATCH v2 04/13] uprobes: allow arch-specific initialization | Date | Tue, 15 Oct 2013 17:04:19 -0400 |
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From: Rabin Vincent <rabin@rab.in>
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 <rabin@rab.in> Signed-off-by: David A. Long <dave.long@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 2556ab6..a28dcbe 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -135,6 +135,7 @@ extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs) extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, 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 22d0121..9734a5f 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1860,8 +1860,14 @@ 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++) @@ -1870,6 +1876,10 @@ 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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