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From: | Richard Henderson |
Subject: | Re: [PATCH v2 6/7] target/nios2: Remove assignment to env in handle_instruction |
Date: | Mon, 28 Jun 2021 08:58:14 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 |
On 6/28/21 8:31 AM, Peter Maydell wrote:
On Sun, 20 Jun 2021 at 23:15, Richard Henderson <richard.henderson@linaro.org> wrote:Direct assignments to env during translation do not work. As it happens, the only way we can get here is if env->pc is already set to dc->pc.More to the point, t_gen_helper_raise_exception() does tcg_gen_movi_tl(dc->cpu_R[R_PC], dc->pc); before raising the exception (as you would expect it to).
Ah, didn't notice that. My comment works from the other direction:Within the page, 0x1000-0x1fff, any insn executed will raise the 0xaa exception, which means pc will be set for that insn.
r~
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