[PATCH] target/riscv: Check the correct exception cause in vector GDB stub

[frank . chang]

From: Frank Chang <frank.ch...@sifive.com>

After RISCVException enum is introduced, riscv_csrrw_debug() returns
RISCV_EXCP_NONE to indicate there's no error. RISC-V vector GDB stub
should check the result against RISCV_EXCP_NONE instead of value 0.
Otherwise, 'E14' packet would be incorrectly reported for vector CSRs
when using "info reg vector" GDB command.

Signed-off-by: Frank Chang <frank.ch...@sifive.com>
Reviewed-by: Jim Shu <jim....@sifive.com>
Reviewed-by: Tommy Wu <tommy...@sifive.com>
---
 target/riscv/gdbstub.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c
index 9ed049c29e..118bd40f10 100644
--- a/target/riscv/gdbstub.c
+++ b/target/riscv/gdbstub.c
@@ -211,7 +211,7 @@ static int riscv_gdb_get_vector(CPURISCVState *env, 
GByteArray *buf, int n)
     target_ulong val = 0;
     int result = riscv_csrrw_debug(env, csrno, &val, 0, 0);
 
-    if (result == 0) {
+    if (result == RISCV_EXCP_NONE) {
         return gdb_get_regl(buf, val);
     }
 
@@ -238,7 +238,7 @@ static int riscv_gdb_set_vector(CPURISCVState *env, uint8_t 
*mem_buf, int n)
     target_ulong val = ldtul_p(mem_buf);
     int result = riscv_csrrw_debug(env, csrno, NULL, val, -1);
 
-    if (result == 0) {
+    if (result == RISCV_EXCP_NONE) {
         return sizeof(target_ulong);
     }
 
-- 
2.36.1