Re: [PATCH] target/riscv: Set opcode to env->bins for illegal/virtual instruction fault

[Alistair Francis]

On Thu, Mar 30, 2023 at 1:47 PM Weiwei Li <liweiwei@iscas.ac.cn> wrote:
>
> decode_save_opc() will not work for generate_exception(), since 0 is passed
> to riscv_raise_exception() as pc in helper_raise_exception(), and bins will
> not be restored in this case.
>
> Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
> Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>

Acked-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  target/riscv/insn_trans/trans_rvh.c.inc | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/target/riscv/insn_trans/trans_rvh.c.inc 
> b/target/riscv/insn_trans/trans_rvh.c.inc
> index 9248b48c36..4b730cd492 100644
> --- a/target/riscv/insn_trans/trans_rvh.c.inc
> +++ b/target/riscv/insn_trans/trans_rvh.c.inc
> @@ -20,6 +20,8 @@
>  static bool check_access(DisasContext *ctx)
>  {
>      if (!ctx->hlsx) {
> +        tcg_gen_st_i32(tcg_constant_i32(ctx->opcode), cpu_env,
> +                       offsetof(CPURISCVState, bins));
>          if (ctx->virt_enabled) {
>              generate_exception(ctx, RISCV_EXCP_VIRT_INSTRUCTION_FAULT);
>          } else {
> --
> 2.25.1
>
>