diff options
| author | Julia Suvorova <jusual@mail.ru> | 2018-08-14 17:17:18 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-08-14 17:17:18 +0100 |
| commit | def183446cebc0090f6d885383a6502302249f33 (patch) | |
| tree | 7fe6be471e4ba13e8be2e5f7fd81c350f1ba4b39 /target/arm | |
| parent | 38441756b70eec5807b5f60dad11a93a91199866 (diff) | |
target/arm: Forbid unprivileged mode for M Baseline
MSR handling is the only place where CONTROL.nPRIV is modified.
Signed-off-by: Julia Suvorova <jusual@mail.ru>
Message-id: 20180705222622.17139-1-jusual@mail.ru
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm')
| -rw-r--r-- | target/arm/helper.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 66afb08ee0..a6d642f4ae 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -10728,8 +10728,10 @@ void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val) write_v7m_control_spsel_for_secstate(env, val & R_V7M_CONTROL_SPSEL_MASK, M_REG_NS); - env->v7m.control[M_REG_NS] &= ~R_V7M_CONTROL_NPRIV_MASK; - env->v7m.control[M_REG_NS] |= val & R_V7M_CONTROL_NPRIV_MASK; + if (arm_feature(env, ARM_FEATURE_M_MAIN)) { + env->v7m.control[M_REG_NS] &= ~R_V7M_CONTROL_NPRIV_MASK; + env->v7m.control[M_REG_NS] |= val & R_V7M_CONTROL_NPRIV_MASK; + } return; case 0x98: /* SP_NS */ { @@ -10822,8 +10824,10 @@ void HELPER(v7m_msr)(CPUARMState *env, uint32_t maskreg, uint32_t val) !arm_v7m_is_handler_mode(env)) { write_v7m_control_spsel(env, (val & R_V7M_CONTROL_SPSEL_MASK) != 0); } - env->v7m.control[env->v7m.secure] &= ~R_V7M_CONTROL_NPRIV_MASK; - env->v7m.control[env->v7m.secure] |= val & R_V7M_CONTROL_NPRIV_MASK; + if (arm_feature(env, ARM_FEATURE_M_MAIN)) { + env->v7m.control[env->v7m.secure] &= ~R_V7M_CONTROL_NPRIV_MASK; + env->v7m.control[env->v7m.secure] |= val & R_V7M_CONTROL_NPRIV_MASK; + } break; default: bad_reg: |