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

[LIU Zhiwei]

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

Zhiwei

On 2022/9/18 16:32, frank.chang@sifive.com wrote:
> From: Frank Chang <frank.chang@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.chang@sifive.com>
> Reviewed-by: Jim Shu <jim.shu@sifive.com>
> Reviewed-by: Tommy Wu <tommy.wu@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);
>       }
>