diff options
| author | Guo Ren <guoren@linux.alibaba.com> | 2020-12-17 16:01:44 +0000 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-01-14 15:09:08 -0800 |
| commit | 74784081aac8a0f3636965fc230e2d3b7cc123c6 (patch) | |
| tree | 5fa2a78dc3467d7d3e53525da8011e4c512f2f1f /arch/riscv/kernel/traps.c | |
| parent | 829adda597fef2fe133d57aac681580b2e292268 (diff) | |
riscv: Add uprobes supported
This patch adds support for uprobes on riscv architecture.
Just like kprobe, it support single-step and simulate instructions.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/kernel/traps.c')
| -rw-r--r-- | arch/riscv/kernel/traps.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index 19a788a271f7..2bca2fab2d27 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -76,6 +76,8 @@ void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr) static void do_trap_error(struct pt_regs *regs, int signo, int code, unsigned long addr, const char *str) { + current->thread.bad_cause = regs->cause; + if (user_mode(regs)) { do_trap(regs, signo, code, addr); } else { @@ -153,6 +155,14 @@ asmlinkage __visible void do_trap_break(struct pt_regs *regs) if (kprobe_breakpoint_handler(regs)) return; #endif +#ifdef CONFIG_UPROBES + if (uprobe_single_step_handler(regs)) + return; + + if (uprobe_breakpoint_handler(regs)) + return; +#endif + current->thread.bad_cause = regs->cause; if (user_mode(regs)) force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->epc); |