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81 lines
2.6 KiB
81 lines
2.6 KiB
/* |
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* Copyright (c) 2010-2014 Wind River Systems, Inc. |
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* Copyright (c) 2020 Intel Corporation |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#include <zephyr/kernel.h> |
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#include <kernel_internal.h> |
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#include <zephyr/linker/linker-defs.h> |
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#ifdef CONFIG_REQUIRES_STACK_CANARIES |
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#ifdef CONFIG_STACK_CANARIES_TLS |
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extern Z_THREAD_LOCAL volatile uintptr_t __stack_chk_guard; |
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#else |
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extern volatile uintptr_t __stack_chk_guard; |
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#endif /* CONFIG_STACK_CANARIES_TLS */ |
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#endif /* CONFIG_REQUIRES_STACK_CANARIES */ |
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/** |
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* @brief Copy the data section from ROM to RAM |
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* |
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* This routine copies the data section from ROM to RAM. |
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*/ |
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void z_data_copy(void) |
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{ |
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z_early_memcpy(&__data_region_start, &__data_region_load_start, |
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__data_region_end - __data_region_start); |
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#ifdef CONFIG_ARCH_HAS_RAMFUNC_SUPPORT |
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z_early_memcpy(&__ramfunc_region_start, &__ramfunc_load_start, |
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__ramfunc_end - __ramfunc_region_start); |
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#endif /* CONFIG_ARCH_HAS_RAMFUNC_SUPPORT */ |
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#ifdef CONFIG_ARCH_HAS_NOCACHE_MEMORY_SUPPORT |
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#if CONFIG_NOCACHE_MEMORY |
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z_early_memcpy(&_nocache_ram_start, &_nocache_load_start, |
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(uintptr_t) &_nocache_ram_size); |
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#endif /* CONFIG_NOCACHE_MEMORY */ |
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#endif /* CONFIG_ARCH_HAS_NOCACHE_MEMORY_SUPPORT */ |
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#if DT_NODE_HAS_STATUS_OKAY(DT_CHOSEN(zephyr_ccm)) |
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z_early_memcpy(&__ccm_data_start, &__ccm_data_load_start, |
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__ccm_data_end - __ccm_data_start); |
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#endif |
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#if DT_NODE_HAS_STATUS_OKAY(DT_CHOSEN(zephyr_itcm)) |
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z_early_memcpy(&__itcm_start, &__itcm_load_start, |
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(uintptr_t) &__itcm_size); |
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#endif |
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#if DT_NODE_HAS_STATUS_OKAY(DT_CHOSEN(zephyr_dtcm)) |
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z_early_memcpy(&__dtcm_data_start, &__dtcm_data_load_start, |
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__dtcm_data_end - __dtcm_data_start); |
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#endif |
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#ifdef CONFIG_CODE_DATA_RELOCATION |
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extern void data_copy_xip_relocation(void); |
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data_copy_xip_relocation(); |
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#endif /* CONFIG_CODE_DATA_RELOCATION */ |
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#ifdef CONFIG_USERSPACE |
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#ifdef CONFIG_REQUIRES_STACK_CANARIES |
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/* stack canary checking is active for all C functions. |
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* __stack_chk_guard is some uninitialized value living in the |
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* app shared memory sections. Preserve it, and don't make any |
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* function calls to perform the memory copy. The true canary |
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* value gets set later in z_cstart(). |
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*/ |
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uintptr_t guard_copy = __stack_chk_guard; |
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uint8_t *src = (uint8_t *)&_app_smem_rom_start; |
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uint8_t *dst = (uint8_t *)&_app_smem_start; |
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uint32_t count = _app_smem_end - _app_smem_start; |
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guard_copy = __stack_chk_guard; |
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while (count > 0) { |
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*(dst++) = *(src++); |
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count--; |
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} |
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__stack_chk_guard = guard_copy; |
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#else |
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z_early_memcpy(&_app_smem_start, &_app_smem_rom_start, |
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_app_smem_end - _app_smem_start); |
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#endif /* CONFIG_REQUIRES_STACK_CANARIES */ |
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#endif /* CONFIG_USERSPACE */ |
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}
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