From 5ad17be9307907eadc844ed8cd8f036baffddd67 Mon Sep 17 00:00:00 2001 From: Christian Mauderer Date: Fri, 28 May 2021 16:58:49 +0200 Subject: cpu/armv7m: Avoid regions with negative size Don't initialze regions that have a negative size (for example due to a wrong calculation). Update #4450 --- cpukit/score/cpu/arm/include/rtems/score/armv7m.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'cpukit') diff --git a/cpukit/score/cpu/arm/include/rtems/score/armv7m.h b/cpukit/score/cpu/arm/include/rtems/score/armv7m.h index 8f926e826a..a5eaaef418 100644 --- a/cpukit/score/cpu/arm/include/rtems/score/armv7m.h +++ b/cpukit/score/cpu/arm/include/rtems/score/armv7m.h @@ -656,7 +656,7 @@ static inline void _ARMV7M_MPU_Set_region( RTEMS_OBFUSCATE_VARIABLE(end); size = (uintptr_t) end - (uintptr_t) begin; - if ( size > 0 ) { + if ( (uintptr_t) end > (uintptr_t) begin ) { rbar = (uintptr_t) begin | region | ARMV7M_MPU_RBAR_VALID; rasr |= _ARMV7M_MPU_Get_region_size(size); } else { -- cgit v1.2.3