ee9c44fee6
Instead of rounding up both __tdata_size and __tbss_size at runtime, perform the calculation when the image is built. Signed-off-by: Peter Mitsis <peter.mitsis@intel.com>
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/*
|
|
* Copyright (c) 2020 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Kernel Thread Local Storage APIs.
|
|
*
|
|
* Kernel APIs related to thread local storage.
|
|
*/
|
|
|
|
#ifndef ZEPHYR_KERNEL_INCLUDE_KERNEL_TLS_H_
|
|
#define ZEPHYR_KERNEL_INCLUDE_KERNEL_TLS_H_
|
|
|
|
#include <zephyr/linker/linker-defs.h>
|
|
|
|
/**
|
|
* @brief Return the total size of TLS data/bss areas
|
|
*
|
|
* This returns the total size of thread local storage (TLS)
|
|
* data and bss areas as defined in the linker script.
|
|
* Note that this does not include any architecture specific
|
|
* bits required for proper functionality of TLS.
|
|
*
|
|
* @return Total size of TLS data/bss areas
|
|
*/
|
|
static inline size_t z_tls_data_size(void)
|
|
{
|
|
return (size_t)(uintptr_t)__tdata_size +
|
|
(size_t)(uintptr_t)__tbss_size;
|
|
}
|
|
|
|
/**
|
|
* @brief Copy the TLS data/bss areas into destination
|
|
*
|
|
* This copies the TLS data into destination and clear the area
|
|
* of TLS bss size after the data section.
|
|
*
|
|
* @param dest Pointer to destination
|
|
*/
|
|
static inline void z_tls_copy(char *dest)
|
|
{
|
|
/* Copy initialized data (tdata) */
|
|
memcpy(dest, __tdata_start, (size_t)(uintptr_t)__tdata_size);
|
|
|
|
/* Clear BSS data (tbss) */
|
|
dest += (size_t)(uintptr_t)__tdata_size;
|
|
memset(dest, 0, (size_t)(uintptr_t)__tbss_size);
|
|
}
|
|
|
|
#endif /* ZEPHYR_KERNEL_INCLUDE_KERNEL_TLS_H_ */
|