Author: dchagin
Date: Sat Apr 29 09:20:04 2017
New Revision: 317588
URL: https://svnweb.freebsd.org/changeset/base/317588
Log:
MFC r316288:
Add kern_mincore() helper for mincore() syscall.
Modified:
stable/11/sys/sys/syscallsubr.h
stable/11/sys/vm/vm_mmap.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/sys/syscallsubr.h
==============================================================================
--- stable/11/sys/sys/syscallsubr.h Sat Apr 29 09:18:55 2017
(r317587)
+++ stable/11/sys/sys/syscallsubr.h Sat Apr 29 09:20:04 2017
(r317588)
@@ -151,6 +151,7 @@ int kern_lseek(struct thread *td, int fd
int kern_lutimes(struct thread *td, char *path, enum uio_seg pathseg,
struct timeval *tptr, enum uio_seg tptrseg);
int kern_madvise(struct thread *td, uintptr_t addr, size_t len, int behav);
+int kern_mincore(struct thread *td, uintptr_t addr, size_t len, char *vec);
int kern_mkdirat(struct thread *td, int fd, char *path,
enum uio_seg segflg, int mode);
int kern_mkfifoat(struct thread *td, int fd, char *path,
Modified: stable/11/sys/vm/vm_mmap.c
==============================================================================
--- stable/11/sys/vm/vm_mmap.c Sat Apr 29 09:18:55 2017 (r317587)
+++ stable/11/sys/vm/vm_mmap.c Sat Apr 29 09:20:04 2017 (r317588)
@@ -711,11 +711,17 @@ struct mincore_args {
int
sys_mincore(struct thread *td, struct mincore_args *uap)
{
+
+ return (kern_mincore(td, (uintptr_t)uap->addr, uap->len, uap->vec));
+}
+
+int
+kern_mincore(struct thread *td, uintptr_t addr0, size_t len, char *vec)
+{
vm_offset_t addr, first_addr;
vm_offset_t end, cend;
pmap_t pmap;
vm_map_t map;
- char *vec;
int error = 0;
int vecindex, lastvecindex;
vm_map_entry_t current;
@@ -732,17 +738,12 @@ sys_mincore(struct thread *td, struct mi
* Make sure that the addresses presented are valid for user
* mode.
*/
- first_addr = addr = trunc_page((vm_offset_t) uap->addr);
- end = addr + (vm_size_t)round_page(uap->len);
+ first_addr = addr = trunc_page(addr0);
+ end = addr + (vm_size_t)round_page(len);
map = &td->td_proc->p_vmspace->vm_map;
if (end > vm_map_max(map) || end < addr)
return (ENOMEM);
- /*
- * Address of byte vector
- */
- vec = uap->vec;
-
pmap = vmspace_pmap(td->td_proc->p_vmspace);
vm_map_lock_read(map);
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