[Backport v4.2-branch] arch: arm: start threads on privileged stack #97306
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
![github-actions[bot]](https://avatars.githubusercontent.com/in/15368?s=80&v=4){kind=small}
Use the privileged stack when starting K_USER threads in arch_new_thread(). Threads entering user mode with k_thread_user_mode_enter() keep their existing flow. To support both cases, z_arm_userspace_enter() now takes an internal ABI flag (sp_is_priv) indicating whether PSP already points to the privileged stack. Also fix calculation of the privileged stack top: use priv_stack_end directly instead of priv_stack_start + CONFIG_PRIVILEGED_STACK_SIZE, which failed to account for guard/FPU offsets applied to priv_stack_start. Signed-off-by: Sudan Landge <[email protected]> (cherry picked from commit 0438b9f)
|
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Backport 0438b9f from #96850.
Fixes #97304