Re: [PATCH 12/18] target/riscv: Allow debugger to access user timer and counter CSRs

[LIU Zhiwei]

On 2023/2/14 9:09, Bin Meng wrote:

At present user timer and counter CSRs are not reported in the
CSR XML hence gdb cannot access them.

Fix it by addding a debugger check in their predicate() routine.

Signed-off-by: Bin Meng <bm...@tinylab.org>
---

  target/riscv/csr.c | 4 ++++
  1 file changed, 4 insertions(+)

diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 749d0ef83e..515b05348b 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -131,6 +131,10 @@ static RISCVException ctr(CPURISCVState *env, int csrno)

skip_ext_pmu_check: + if (env->debugger) {

+        return RISCV_EXCP_NONE;
+    }
+

Reviewed-by: LIU Zhiwei <zhiwei_...@linux.alibaba.com>


Zhiwei

      if (env->priv < PRV_M && !get_field(env->mcounteren, ctr_mask)) {
          return RISCV_EXCP_ILLEGAL_INST;
      }