vm_gudet Kernel Service
Purpose
Removes a region attached with vm_guatt from the current process's address space.
Syntax
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/vmuser.h>
int vm_gudet (kaddr, uaddr, size, flags)
void * kaddr;
void * uaddr;
vmsize_t size;
long flags;
Parameters
| Item | Description |
|---|---|
| kaddr | Kernel address attached by vm_guatt. |
| uaddr | Location in the process address space where the kernel region was attached. |
| size | Length of the attached region, in bytes. |
| flags | Type of vm_gudet operation, must be VU_ANYWHERE. |
Description
vm_gudet is a kernel service that detaches a region of global kernel memory that was attached by vm_guatt. This memory must still be allocated, detaching a region after it has been deallocated with vm_gfree is an error. If the detach is successful, the global kernel memory region at kaddr will no longer be addressable at uaddr by the calling process.
Execution Environment
The vm_gudet kernel service can be called from the process environment only.
Return Values
| Item | Description |
|---|---|
| 0 | User address detached successfully. |
| EINVAL | Indicates one of the following errors:
|
Implementation Specifics
The vm_gudet kernel service is part of Base Operating System (BOS) Runtime.