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CONFIGURE_MAXIMUM_THREAD_LOCAL_STORAGE_SIZE

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Add this application configuration option.  This configuration option can be
used to reserve space for the dynamic linking of modules with thread-local
storage objects.

Add RTEMS_TASK_STORAGE_ALIGNMENT to define the minium alignment of a
thread-local storage size.

Update #4074.
This commit is contained in:
Sebastian Huber
2020-09-10 16:35:09 +02:00
parent dce1cdf19e
commit c312f3110e
13 changed files with 186 additions and 8 deletions
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37
cpukit/doxygen/appl-config.h
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@@ -801,6 +801,43 @@
*/
#define CONFIGURE_MAXIMUM_TASKS
/**
* @brief This configuration option is an integer define.
*
* If the value of this configuration option is greater than zero, then it
* defines the maximum thread-local storage size, otherwise the thread-local
* storage size is defined by the linker depending on the thread-local storage
* objects used by the application in the statically-linked executable.
*
* @par Default Value
* The default value is 0.
*
* @par Value Constraints
* The value of this configuration option shall be greater than or equal to 0
* and less than or equal to <a
* href="https://en.cppreference.com/w/c/types/limits">SIZE_MAX</a>.
*
* @par Notes
* @parblock
* This configuration option can be used to reserve space for the dynamic
* linking of modules with thread-local storage objects.
*
* If the thread-local storage size defined by the thread-local storage objects
* used by the application in the statically-linked executable is greater than
* a non-zero value of this configuration option, then a fatal error will occur
* during system initialization.
*
* Use RTEMS_ALIGN_UP() and #RTEMS_TASK_STORAGE_ALIGNMENT to adjust the size to
* meet the minimum alignment requirement of a thread-local storage area.
*
* The actual thread-local storage size is determined when the application
* executable is linked. The ``rtems-exeinfo`` command line tool included in
* the RTEMS Tools can be used to obtain the thread-local storage size and
* alignment of an application executable.
* @endparblock
*/
#define CONFIGURE_MAXIMUM_THREAD_LOCAL_STORAGE_SIZE
/**
* @brief This configuration option is an integer define.
*