Using the MSR instruction to write to CPSR.E is deprecated, but it is
required to work from any mode including unprivileged code. We were
incorrectly forbidding usermode code from writing it because
CPSR_USER did not include the CPSR_E bit.
We use CPSR_USER in only three places:
* as the mask of
On Mon, 18 May 2020 at 15:28, Peter Maydell wrote:
>
> Using the MSR instruction to write to CPSR.E is deprecated, but it is
> required to work from any mode including unprivileged code. We were
> incorrectly forbidding usermode code from writing it because
> CPSR_USER did not include the CPSR_E
On 5/18/20 7:28 AM, Peter Maydell wrote:
> Using the MSR instruction to write to CPSR.E is deprecated, but it is
> required to work from any mode including unprivileged code. We were
> incorrectly forbidding usermode code from writing it because
> CPSR_USER did not include the CPSR_E bit.
>
> We
Using the MSR instruction to write to CPSR.E is deprecated, but it is
required to work from any mode including unprivileged code. We were
incorrectly forbidding usermode code from writing it because
CPSR_USER did not include the CPSR_E bit.
We use CPSR_USER in only three places:
* as the mask of
