diff options
Diffstat (limited to 'arch/arm64/kernel/probes/kprobes.c')
| -rw-r--r-- | arch/arm64/kernel/probes/kprobes.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c index 6dbcc89f6662..d9dfa82c1f18 100644 --- a/arch/arm64/kernel/probes/kprobes.c +++ b/arch/arm64/kernel/probes/kprobes.c @@ -7,6 +7,9 @@ * Copyright (C) 2013 Linaro Limited. * Author: Sandeepa Prabhu <sandeepa.prabhu@linaro.org> */ + +#define pr_fmt(fmt) "kprobes: " fmt + #include <linux/extable.h> #include <linux/kasan.h> #include <linux/kernel.h> @@ -218,7 +221,7 @@ static int __kprobes reenter_kprobe(struct kprobe *p, break; case KPROBE_HIT_SS: case KPROBE_REENTER: - pr_warn("Unrecoverable kprobe detected.\n"); + pr_warn("Failed to recover from reentered kprobes.\n"); dump_kprobe(p); BUG(); break; @@ -398,18 +401,17 @@ int __init arch_populate_kprobe_blacklist(void) void __kprobes __used *trampoline_probe_handler(struct pt_regs *regs) { - return (void *)kretprobe_trampoline_handler(regs, &kretprobe_trampoline, - (void *)kernel_stack_pointer(regs)); + return (void *)kretprobe_trampoline_handler(regs, (void *)regs->regs[29]); } void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri, struct pt_regs *regs) { ri->ret_addr = (kprobe_opcode_t *)regs->regs[30]; - ri->fp = (void *)kernel_stack_pointer(regs); + ri->fp = (void *)regs->regs[29]; /* replace return addr (x30) with trampoline */ - regs->regs[30] = (long)&kretprobe_trampoline; + regs->regs[30] = (long)&__kretprobe_trampoline; } int __kprobes arch_trampoline_kprobe(struct kprobe *p) |