diff options
Diffstat (limited to 'target/arm/internals.h')
| -rw-r--r-- | target/arm/internals.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/target/arm/internals.h b/target/arm/internals.h index 24c0444c8d..2495681435 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -801,4 +801,20 @@ static inline uint32_t arm_debug_exception_fsr(CPUARMState *env) */ #define MEMOPIDX_SHIFT 8 +/** + * v7m_using_psp: Return true if using process stack pointer + * Return true if the CPU is currently using the process stack + * pointer, or false if it is using the main stack pointer. + */ +static inline bool v7m_using_psp(CPUARMState *env) +{ + /* Handler mode always uses the main stack; for thread mode + * the CONTROL.SPSEL bit determines the answer. + * Note that in v7M it is not possible to be in Handler mode with + * CONTROL.SPSEL non-zero, but in v8M it is, so we must check both. + */ + return !arm_v7m_is_handler_mode(env) && + env->v7m.control[env->v7m.secure] & R_V7M_CONTROL_SPSEL_MASK; +} + #endif |