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Diffstat (limited to 'arch/ppc64/kernel/kprobes.c')
-rw-r--r--arch/ppc64/kernel/kprobes.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/ppc64/kernel/kprobes.c b/arch/ppc64/kernel/kprobes.c
index 5a9f47b18c45..8f3317244311 100644
--- a/arch/ppc64/kernel/kprobes.c
+++ b/arch/ppc64/kernel/kprobes.c
@@ -45,12 +45,17 @@ static struct pt_regs jprobe_saved_regs;
45 45
46int arch_prepare_kprobe(struct kprobe *p) 46int arch_prepare_kprobe(struct kprobe *p)
47{ 47{
48 int ret = 0;
48 kprobe_opcode_t insn = *p->addr; 49 kprobe_opcode_t insn = *p->addr;
49 50
50 if (IS_MTMSRD(insn) || IS_RFID(insn)) 51 if ((unsigned long)p->addr & 0x03) {
51 /* cannot put bp on RFID/MTMSRD */ 52 printk("Attempt to register kprobe at an unaligned address\n");
52 return 1; 53 ret = -EINVAL;
53 return 0; 54 } else if (IS_MTMSRD(insn) || IS_RFID(insn)) {
55 printk("Cannot register a kprobe on rfid or mtmsrd\n");
56 ret = -EINVAL;
57 }
58 return ret;
54} 59}
55 60
56void arch_copy_kprobe(struct kprobe *p) 61void arch_copy_kprobe(struct kprobe *p)