/*
* The actual disarming is done here on each CPU and synchronized using
* stop_machine. This synchronization is necessary on SMP to avoid removing
* a probe between the moment the 'Undefined Instruction' exception is raised
* and the moment the exception handler reads the faulting instruction from
* memory. It is also needed to atomically set the two half-words of a 32-bit
* Thumb breakpoint.
*/
int __kprobes __arch_disarm_kprobe(void *p)
{
struct kprobe *kp = p;
void *addr = (void *)((uintptr_t)kp->addr & ~1);
__patch_text(addr, kp->opcode);
return 0;
}
static int __kprobes_remove_breakpoint(void *data)
{
struct patch *p = data;
__patch_text(p->addr, p->insn);
return 0;
}
