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    SubjectRe: [PATCH 16/18] arm64: kprobes: fix kprobes without CONFIG_KRETPROBES
    On Fri, 18 Oct 2019 at 18:11, Sami Tolvanen <samitolvanen@google.com> wrote:
    >
    > This allows CONFIG_KRETPROBES to be disabled without disabling
    > kprobes entirely.
    >
    > Signed-off-by: Sami Tolvanen <samitolvanen@google.com>

    Can we make kretprobes work with the shadow call stack instead?

    > ---
    > arch/arm64/kernel/probes/kprobes.c | 2 ++
    > 1 file changed, 2 insertions(+)
    >
    > diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
    > index c4452827419b..98230ae979ca 100644
    > --- a/arch/arm64/kernel/probes/kprobes.c
    > +++ b/arch/arm64/kernel/probes/kprobes.c
    > @@ -551,6 +551,7 @@ void __kprobes __used *trampoline_probe_handler(struct pt_regs *regs)
    > return (void *)orig_ret_address;
    > }
    >
    > +#ifdef CONFIG_KRETPROBES
    > void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
    > struct pt_regs *regs)
    > {
    > @@ -564,6 +565,7 @@ int __kprobes arch_trampoline_kprobe(struct kprobe *p)
    > {
    > return 0;
    > }
    > +#endif
    >
    > int __init arch_init_kprobes(void)
    > {
    > --
    > 2.23.0.866.gb869b98d4c-goog
    >

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