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kernel: add K_THREAD_STACK_RESERVED

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This is used to have each arch canonically state how much
room in the stack object is reserved for non-thread use.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2019-03-19 10:42:24 -07:00 • committed by Andrew Boie
commit 575abc0150
4 changed files with 36 additions and 8 deletions
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13
include/kernel.h
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@ -4580,6 +4580,7 @@ extern void z_timer_expiration_handler(struct _timeout *t);
#define K_THREAD_STACK_LEN(size) Z_ARCH_THREAD_STACK_LEN(size)
#define K_THREAD_STACK_MEMBER(sym, size) Z_ARCH_THREAD_STACK_MEMBER(sym, size)
#define K_THREAD_STACK_SIZEOF(sym) Z_ARCH_THREAD_STACK_SIZEOF(sym)
#define K_THREAD_STACK_RESERVED Z_ARCH_THREAD_STACK_RESERVED
static inline char *K_THREAD_STACK_BUFFER(k_thread_stack_t *sym)
{
return Z_ARCH_THREAD_STACK_BUFFER(sym);
@ -4677,6 +4678,18 @@ static inline char *K_THREAD_STACK_BUFFER(k_thread_stack_t *sym)
*/
#define K_THREAD_STACK_SIZEOF(sym) sizeof(sym)
/**
* @brief Indicate how much additional memory is reserved for stack objects
*
* Any given stack declaration may have additional memory in it for guard
* areas or supervisor mode stacks. This macro indicates how much space
* is reserved for this. The memory reserved may not be contiguous within
* the stack object, and does not account for additional space used due to
* enforce alignment.
*/
#define K_THREAD_STACK_RESERVED 0
/**
* @brief Get a pointer to the physical stack buffer
*