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[v2,14/18] target/riscv: Allow debugger to access seed CSR

Message ID 20230228104035.1879882-15-bmeng@tinylab.org
State New
Headers show
Series target/riscv: Various fixes to gdbstub and CSR access | expand

Commit Message

Bin Meng Feb. 28, 2023, 1:45 p.m. UTC 
From: Bin Meng <bmeng@tinylab.org>

At present seed CSR is not reported in the CSR XML hence gdb cannot
access it.

Fix it by adding a debugger check in its predicate() routine.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
---

(no changes since v1)

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

diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 10ae5df5e6..15b23b9b5a 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -459,6 +459,10 @@  static RISCVException seed(CPURISCVState *env, int csrno)
     }
 
 #if !defined(CONFIG_USER_ONLY)
+    if (env->debugger) {
+        return RISCV_EXCP_NONE;
+    }
+
     /*
      * With a CSR read-write instruction:
      * 1) The seed CSR is always available in machine mode as normal.