diff options
Diffstat (limited to 'arch/riscv/kernel')
-rw-r--r-- | arch/riscv/kernel/entry.S | 3 | ||||
-rw-r--r-- | arch/riscv/kernel/probes/ftrace.c | 11 | ||||
-rw-r--r-- | arch/riscv/kernel/traps.c | 1 |
3 files changed, 14 insertions, 1 deletions
diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S index 76274a4a1d8e..83095faa680e 100644 --- a/arch/riscv/kernel/entry.S +++ b/arch/riscv/kernel/entry.S @@ -130,6 +130,9 @@ skip_context_tracking: */ andi t0, s1, SR_PIE beqz t0, 1f + /* kprobes, entered via ebreak, must have interrupts disabled. */ + li t0, EXC_BREAKPOINT + beq s4, t0, 1f #ifdef CONFIG_TRACE_IRQFLAGS call trace_hardirqs_on #endif diff --git a/arch/riscv/kernel/probes/ftrace.c b/arch/riscv/kernel/probes/ftrace.c index 17ca5e923bb0..aab85a82f419 100644 --- a/arch/riscv/kernel/probes/ftrace.c +++ b/arch/riscv/kernel/probes/ftrace.c @@ -9,10 +9,16 @@ void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip, struct kprobe *p; struct pt_regs *regs; struct kprobe_ctlblk *kcb; + int bit; + bit = ftrace_test_recursion_trylock(ip, parent_ip); + if (bit < 0) + return; + + preempt_disable_notrace(); p = get_kprobe((kprobe_opcode_t *)ip); if (unlikely(!p) || kprobe_disabled(p)) - return; + goto out; regs = ftrace_get_regs(fregs); kcb = get_kprobe_ctlblk(); @@ -45,6 +51,9 @@ void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip, */ __this_cpu_write(current_kprobe, NULL); } +out: + preempt_enable_notrace(); + ftrace_test_recursion_unlock(bit); } NOKPROBE_SYMBOL(kprobe_ftrace_handler); diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index 0879b5df11b9..1357abf79570 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -178,6 +178,7 @@ asmlinkage __visible void do_trap_break(struct pt_regs *regs) else die(regs, "Kernel BUG"); } +NOKPROBE_SYMBOL(do_trap_break); #ifdef CONFIG_GENERIC_BUG int is_valid_bugaddr(unsigned long pc) |