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target/riscv: Allow debugger to access {h, s}stateen CSRs 

At present {h,s}stateen CSRs are not reported in the CSR XML
hence gdb cannot access them.

Fix it by adjusting their predicate() routine logic so that the
static config check comes before the run-time check, as well as
adding a debugger check.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Message-ID: <20230228104035.1879882-16-bmeng@tinylab.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Bin Meng 2023-02-28 21:45:32 +08:00 committed by Palmer Dabbelt
parent ddb10742f1
commit 0308fc6219
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
1 changed files with 20 additions and 2 deletions
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22
target/riscv/csr.c
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@ -337,13 +337,22 @@ static RISCVException hstateen_pred(CPURISCVState *env, int csrno, int base)
return RISCV_EXCP_ILLEGAL_INST;
}
RISCVException ret = hmode(env, csrno);
if (ret != RISCV_EXCP_NONE) {
return ret;
}
if (env->debugger) {
return RISCV_EXCP_NONE;
}
if (env->priv < PRV_M) {
if (!(env->mstateen[csrno - base] & SMSTATEEN_STATEEN)) {
return RISCV_EXCP_ILLEGAL_INST;
}
}
return hmode(env, csrno);
return RISCV_EXCP_NONE;
}
static RISCVException hstateen(CPURISCVState *env, int csrno)
@ -366,6 +375,15 @@ static RISCVException sstateen(CPURISCVState *env, int csrno)
return RISCV_EXCP_ILLEGAL_INST;
}
RISCVException ret = smode(env, csrno);
if (ret != RISCV_EXCP_NONE) {
return ret;
}
if (env->debugger) {
return RISCV_EXCP_NONE;
}
if (env->priv < PRV_M) {
if (!(env->mstateen[index] & SMSTATEEN_STATEEN)) {
return RISCV_EXCP_ILLEGAL_INST;
@ -378,7 +396,7 @@ static RISCVException sstateen(CPURISCVState *env, int csrno)
}
}
return smode(env, csrno);
return RISCV_EXCP_NONE;
}
/* Checks if PointerMasking registers could be accessed */