diff options
| author | alc <alc@FreeBSD.org> | 2003-06-14 06:20:25 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2003-06-14 06:20:25 +0000 |
| commit | d20c30720bd75946190688b47500e9780baef631 (patch) | |
| tree | dd61e4c6e73f5c138ec859061b2bcca151d658da /sys/vm | |
| parent | a80cfe492357d8c190a91f25d7c62688b38e5c4a (diff) | |
| download | FreeBSD-src-d20c30720bd75946190688b47500e9780baef631.zip FreeBSD-src-d20c30720bd75946190688b47500e9780baef631.tar.gz | |
Move the *_new_altkstack() and *_dispose_altkstack() functions out of the
various pmap implementations into the machine-independent vm. They were
all identical.
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/pmap.h | 2 | ||||
| -rw-r--r-- | sys/vm/vm_extern.h | 2 | ||||
| -rw-r--r-- | sys/vm/vm_glue.c | 31 |
3 files changed, 33 insertions, 2 deletions
diff --git a/sys/vm/pmap.h b/sys/vm/pmap.h index 1a1e232..36ca187 100644 --- a/sys/vm/pmap.h +++ b/sys/vm/pmap.h @@ -131,8 +131,6 @@ void pmap_prefault(pmap_t, vm_offset_t, vm_map_entry_t); int pmap_mincore(pmap_t pmap, vm_offset_t addr); void pmap_new_thread(struct thread *td, int pages); void pmap_dispose_thread(struct thread *td); -void pmap_new_altkstack(struct thread *td, int pages); -void pmap_dispose_altkstack(struct thread *td); void pmap_swapout_thread(struct thread *td); void pmap_swapin_thread(struct thread *td); void pmap_activate(struct thread *td); diff --git a/sys/vm/vm_extern.h b/sys/vm/vm_extern.h index eafc300..4718eff 100644 --- a/sys/vm/vm_extern.h +++ b/sys/vm/vm_extern.h @@ -96,5 +96,7 @@ void vm_object_print(/* db_expr_t */ long, boolean_t, /* db_expr_t */ long, int vm_fault_quick(caddr_t v, int prot); void vm_proc_new(struct proc *p); void vm_proc_dispose(struct proc *p); +void vm_thread_new_altkstack(struct thread *td, int pages); +void vm_thread_dispose_altkstack(struct thread *td); #endif /* _KERNEL */ #endif /* !_VM_EXTERN_H_ */ diff --git a/sys/vm/vm_glue.c b/sys/vm/vm_glue.c index ec15d96..2145c0c 100644 --- a/sys/vm/vm_glue.c +++ b/sys/vm/vm_glue.c @@ -388,6 +388,37 @@ retry: #endif /* + * Set up a variable-sized alternate kstack. + */ +void +vm_thread_new_altkstack(struct thread *td, int pages) +{ + + td->td_altkstack = td->td_kstack; + td->td_altkstack_obj = td->td_kstack_obj; + td->td_altkstack_pages = td->td_kstack_pages; + + pmap_new_thread(td, pages); +} + +/* + * Restore the original kstack. + */ +void +vm_thread_dispose_altkstack(struct thread *td) +{ + + pmap_dispose_thread(td); + + td->td_kstack = td->td_altkstack; + td->td_kstack_obj = td->td_altkstack_obj; + td->td_kstack_pages = td->td_altkstack_pages; + td->td_altkstack = 0; + td->td_altkstack_obj = NULL; + td->td_altkstack_pages = 0; +} + +/* * Implement fork's actions on an address space. * Here we arrange for the address space to be copied or referenced, * allocate a user struct (pcb and kernel stack), then call the |
