diff --git a/arch/sh/include/asm/kprobes.h b/arch/sh/include/asm/kprobes.h index 85d8bcaa8493..6171682f7798 100644 --- a/arch/sh/include/asm/kprobes.h +++ b/arch/sh/include/asm/kprobes.h @@ -27,7 +27,6 @@ struct kprobe; void arch_remove_kprobe(struct kprobe *); void kretprobe_trampoline(void); -void jprobe_return_end(void); /* Architecture specific copy of original instruction*/ struct arch_specific_insn { @@ -43,9 +42,6 @@ struct prev_kprobe { /* per-cpu kprobe control block */ struct kprobe_ctlblk { unsigned long kprobe_status; - unsigned long jprobe_saved_r15; - struct pt_regs jprobe_saved_regs; - kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; struct prev_kprobe prev_kprobe; }; diff --git a/arch/sh/kernel/kprobes.c b/arch/sh/kernel/kprobes.c index 52a5e11247d1..2b5e58873b96 100644 --- a/arch/sh/kernel/kprobes.c +++ b/arch/sh/kernel/kprobes.c @@ -523,57 +523,6 @@ 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); - unsigned long addr; - struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); - - kcb->jprobe_saved_regs = *regs; - kcb->jprobe_saved_r15 = regs->regs[15]; - addr = kcb->jprobe_saved_r15; - - /* - * TBD: As Linus pointed out, gcc assumes that the callee - * owns the argument space and could overwrite it, e.g. - * tailcall optimization. So, to be absolutely safe - * we also save and restore enough stack bytes to cover - * the argument area. - */ - memcpy(kcb->jprobes_stack, (kprobe_opcode_t *) addr, - MIN_STACK_SIZE(addr)); - - regs->pc = (unsigned long)(jp->entry); - - return 1; -} - -void __kprobes jprobe_return(void) -{ - asm volatile ("trapa #0x3a\n\t" "jprobe_return_end:\n\t" "nop\n\t"); -} - -int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs) -{ - struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); - unsigned long stack_addr = kcb->jprobe_saved_r15; - u8 *addr = (u8 *)regs->pc; - - if ((addr >= (u8 *)jprobe_return) && - (addr <= (u8 *)jprobe_return_end)) { - *regs = kcb->jprobe_saved_regs; - - memcpy((kprobe_opcode_t *)stack_addr, kcb->jprobes_stack, - MIN_STACK_SIZE(stack_addr)); - - kcb->kprobe_status = KPROBE_HIT_SS; - preempt_enable_no_resched(); - return 1; - } - - return 0; -} - static struct kprobe trampoline_p = { .addr = (kprobe_opcode_t *)&kretprobe_trampoline, .pre_handler = trampoline_probe_handler