https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85388

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to igor.v.tsimbalist from comment #2)
> You are fixing 64bit part. There is similar place for 32bit
> 
>          movl    -8(%ebp),%eax           # Restore the last register.
> 
>          call    *-12(%ebp)              # Call our caller!
> 
> What do we call here? Is it returning back to a function that causes more
> stack allocation? Is it possible for the compiler to insert ENDBR there
> based on some knowledge of morestack was called?

Please take a look if we can insert ENDBR in ix86_expand_split_stack_prologue.

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