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scripts: Add align for empty _app_smem region

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When _app_smem region is empty, alignment is also needed. If there
is no alignment, the _app_smem_start used by arm mpu can be lower
than __rodata_region_end, and this two regions can overlap.

The Armv8-R aarch64 MPU does not allow overlapped regions.

Signed-off-by: Jaxson Han <jaxson.han@arm.com>
This commit is contained in:
Jaxson Han 2021-08-31 14:14:03 +08:00 • committed by Christopher Friedt
commit f079e6638f
2 changed files with 13 additions and 0 deletions
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10
include/arch/arm64/scripts/linker.ld
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@ -218,6 +218,16 @@ SECTIONS
#define APP_SHARED_ALIGN . = ALIGN(_region_min_align);
#define SMEM_PARTITION_ALIGN(size) MMU_ALIGN
#if defined(CONFIG_ARM_MPU)
/*
* When _app_smem region is empty, alignment is also needed. If there
* is no alignment, the _app_smem_start used by arm mpu can be lower
* than __rodata_region_end, and this two regions can overlap.
* The Armv8-R aarch64 MPU does not allow overlapped regions.
*/
#define EMPTY_APP_SHARED_ALIGN APP_SHARED_ALIGN
#endif
#include <app_smem.ld>
_app_smem_size = _app_smem_end - _app_smem_start;