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| author | Peter Maydell <peter.maydell@linaro.org> | 2017-02-28 12:08:19 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2017-02-28 12:08:19 +0000 |
| commit | e13886e3a790b52f0b2e93cb5e84fdc2ada5471a (patch) | |
| tree | 5f76ff9d870ab65b2706330424754bc0d8a60040 /target/arm/helper.c | |
| parent | aa488fe3bb5460c6675800ccd80f6dccbbd70159 (diff) | |
| download | qemu-e13886e3a790b52f0b2e93cb5e84fdc2ada5471a.zip | |
armv7m: Raise correct kind of UsageFault for attempts to execute ARM code
M profile doesn't implement ARM, and the architecturally required
behaviour for attempts to execute with the Thumb bit clear is to
generate a UsageFault with the CFSR INVSTATE bit set. We were
incorrectly implementing this as generating an UNDEFINSTR UsageFault;
fix this.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Diffstat (limited to 'target/arm/helper.c')
| -rw-r--r-- | target/arm/helper.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 9081771656..3f4211b572 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -6245,6 +6245,10 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs) armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE); env->v7m.cfsr |= R_V7M_CFSR_NOCP_MASK; break; + case EXCP_INVSTATE: + armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE); + env->v7m.cfsr |= R_V7M_CFSR_INVSTATE_MASK; + break; case EXCP_SWI: /* The PC already points to the next instruction. */ armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC); |