diff options
| author | Guo Ren <guoren@linux.alibaba.com> | 2020-12-17 17:01:44 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-01-15 00:09:08 +0100 |
| commit | 74784081aac8a0f3636965fc230e2d3b7cc123c6 (patch) | |
| tree | 5fa2a78dc3467d7d3e53525da8011e4c512f2f1f /arch/riscv/mm | |
| parent | riscv: Add KPROBES_ON_FTRACE supported (diff) | |
| download | linux-74784081aac8a0f3636965fc230e2d3b7cc123c6.tar.xz linux-74784081aac8a0f3636965fc230e2d3b7cc123c6.zip | |
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/mm')
| -rw-r--r-- | arch/riscv/mm/fault.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 1da870f33582..8f17519208c7 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -240,6 +240,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs) * in an atomic region, then we must not take the fault. */ if (unlikely(faulthandler_disabled() || !mm)) { + tsk->thread.bad_cause = cause; no_context(regs, addr); return; } @@ -262,16 +263,19 @@ retry: mmap_read_lock(mm); vma = find_vma(mm, addr); if (unlikely(!vma)) { + tsk->thread.bad_cause = cause; bad_area(regs, mm, code, addr); return; } if (likely(vma->vm_start <= addr)) goto good_area; if (unlikely(!(vma->vm_flags & VM_GROWSDOWN))) { + tsk->thread.bad_cause = cause; bad_area(regs, mm, code, addr); return; } if (unlikely(expand_stack(vma, addr))) { + tsk->thread.bad_cause = cause; bad_area(regs, mm, code, addr); return; } @@ -284,6 +288,7 @@ good_area: code = SEGV_ACCERR; if (unlikely(access_error(cause, vma))) { + tsk->thread.bad_cause = cause; bad_area(regs, mm, code, addr); return; } @@ -317,6 +322,7 @@ good_area: mmap_read_unlock(mm); if (unlikely(fault & VM_FAULT_ERROR)) { + tsk->thread.bad_cause = cause; mm_fault_error(regs, addr, fault); return; } |