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Diffstat (limited to 'nuttx/TODO')
| -rw-r--r-- | nuttx/TODO | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/nuttx/TODO b/nuttx/TODO index 1739b618a..b202e9690 100644 --- a/nuttx/TODO +++ b/nuttx/TODO @@ -478,13 +478,23 @@ o Kernel/Protected Build address environment must be instantiated in memory to load the .text and .data and to allocate the initial user space components from the new user heap. + However, the previous program's stack currently resides in its heap. So when a process tries to run another program, its heap is unmapped and the system crashes. + The fix is to add a separate stack in a separate memory region that does not get unmapped when creating new processes. There are hooks in place to do this; I just need to get time to get that done. + + UPDATE: I don't think it is that simple. Startup logic will need + to access the new stack in its correct location to do things like + setup task arguments. So I don't think that there is anyway to + do that without losing the current stack. + + I may have to do the Linux solution: Two stacks for each thread: + The main user stack, and a tiny kernel mode stack. Status: Open Priority: Pretty high... the kernel build is useless without this capability. |