chao.an a98a599cb9 arm/cortex-[a|r]: IRQ Switch return should with shadow SPSR
The SPSR is used to store the current value of the CPSR when an exception
is taken so that it can be restored after handling the exception.
Each exception handling mode can access its own SPSR.

User mode and System mode do not have an SPSR because they are not
exception handling modes.

Signed-off-by: chao.an <anchao@xiaomi.com>
2022-03-30 08:12:26 +09:00
..