patacongo commented on a change in pull request #3517:
URL: https://github.com/apache/incubator-nuttx/pull/3517#discussion_r612930562
##########
File path: arch/arm/src/common/arm_usestack.c
##########
@@ -127,37 +117,17 @@ int up_use_stack(struct tcb_s *tcb, void *stack, size_t
stack_size)
/* Save the new stack allocation */
tcb->stack_alloc_ptr = stack;
-
- /* Align stack top */
-
- tcb->adj_stack_ptr =
- (FAR void *)STACK_ALIGN_DOWN((uintptr_t)stack + stack_size);
-
- /* Offset by tls_size */
-
- stack = (FAR void *)((uintptr_t)stack + tls_size);
-
- /* Is there enough room for at least TLS ? */
-
- if ((uintptr_t)stack > (uintptr_t)tcb->adj_stack_ptr)
- {
- return -ENOMEM;
- }
-
- tcb->adj_stack_size = (uintptr_t)tcb->adj_stack_ptr - (uintptr_t)stack;
-
- /* Initialize the TLS data structure */
-
- memset(tcb->stack_alloc_ptr, 0, tls_size);
+ tcb->adj_stack_ptr = tcb->stack_alloc_ptr;
+ tcb->adj_stack_size =
+ STACK_ALIGN_DOWN((uintptr_t)stack + stack_size) - (uintptr_t)stack;
Review comment:
> > Before this change it looked (CONFIG_TLS_ALIGNED not lit) like
300+sizeof(tls) which I got what I asked for and the OS got what it needed. Is
that still the case?
>
> I believe you will get 300-sizeof(tls). That could be dangerous for finely
tuned, minimal stack sizes.
That could be fixed by adding sizeof(struct task_info_s) or sizeof(struct
tls_info_s) in the up_create_stack alls.
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