diff options
| -rw-r--r-- | arch/arc/include/asm/kprobes.h | 2 | ||||
| -rw-r--r-- | arch/arc/kernel/kprobes.c | 38 |
2 files changed, 2 insertions, 38 deletions
diff --git a/arch/arc/include/asm/kprobes.h b/arch/arc/include/asm/kprobes.h index 2e52d18e6bc7..2c1b479d5aea 100644 --- a/arch/arc/include/asm/kprobes.h +++ b/arch/arc/include/asm/kprobes.h @@ -45,8 +45,6 @@ struct prev_kprobe { struct kprobe_ctlblk { unsigned int kprobe_status; - struct pt_regs jprobe_saved_regs; - char jprobes_stack[MAX_STACK_SIZE]; struct prev_kprobe prev_kprobe; }; diff --git a/arch/arc/kernel/kprobes.c b/arch/arc/kernel/kprobes.c index 42b05046fad9..7811a6bbe8f0 100644 --- a/arch/arc/kernel/kprobes.c +++ b/arch/arc/kernel/kprobes.c @@ -225,10 +225,8 @@ int __kprobes arc_kprobe_handler(unsigned long addr, struct pt_regs *regs) /* If we have no pre-handler or it returned 0, we continue with * normal processing. If we have a pre-handler and it returned - * non-zero - which is expected from setjmp_pre_handler for - * jprobe, we return without single stepping and leave that to - * the break-handler which is invoked by a kprobe from - * jprobe_return + * non-zero - which means user handler setup registers to exit + * to another instruction, we must skip the single stepping. */ if (!p->pre_handler || !p->pre_handler(p, regs)) { setup_singlestep(p, regs); @@ -386,38 +384,6 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self, return ret; } -int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs) -{ - struct jprobe *jp = container_of(p, struct jprobe, kp); - struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); - unsigned long sp_addr = regs->sp; - - kcb->jprobe_saved_regs = *regs; - memcpy(kcb->jprobes_stack, (void *)sp_addr, MIN_STACK_SIZE(sp_addr)); - regs->ret = (unsigned long)(jp->entry); - - return 1; -} - -void __kprobes jprobe_return(void) -{ - __asm__ __volatile__("unimp_s"); - return; -} - -int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs) -{ - struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); - unsigned long sp_addr; - - *regs = kcb->jprobe_saved_regs; - sp_addr = regs->sp; - memcpy((void *)sp_addr, kcb->jprobes_stack, MIN_STACK_SIZE(sp_addr)); - preempt_enable_no_resched(); - - return 1; -} - static void __used kretprobe_trampoline_holder(void) { __asm__ __volatile__(".global kretprobe_trampoline\n" |