Differences between current version and predecessor to the previous major change of modify_ldt(2).
Other diffs: Previous Revision, Previous Author, or view the Annotated Edit History
| Newer page: | version 4 | Last edited on Saturday, March 15, 2003 12:51:04 am | by PerryLorier | |
| Older page: | version 2 | Last edited on Monday, June 3, 2002 6:53:00 pm | by perry | Revert |
@@ -1,79 +1,29 @@
-MODIFY_LDT
-!!!MODIFY_LDT
-NAME
-SYNOPSIS
-DESCRIPTION
-RETURN VALUE
-ERRORS
-CONFORMING TO
-SEE ALSO
-----
!!NAME
-
-
modify_ldt - get or set ldt
!!SYNOPSIS
+ __#include <linux/ldt.h>__
+ __#include <linux/unistd>__
+ ___syscall(int __''modify_ldt''__, int __''func''__, void *__''ptr''__, unsigned long__'' bytecount''__ )__
+ __char *modify_ldt(int __ ''func''__, void *__''ptr''__, unsigned long__ ''bytecount''__);__
-
-__#include
-__ ''func''__, void *__''ptr''__, unsigned long__ ''bytecount''__);
-__
!!DESCRIPTION
+__modify_ldt__ reads or writes the local descriptor table (ldt) for a process. The ldt is a per-process memory management table used by the i386 processor. For more
+information on this table, see an Intel 386 processor handbook.
+When ''func'' is 0, __modify_ldt__ reads the ldt into the memory pointed to by ''ptr''. The number of bytes read is the smaller of ''bytecount'' and the actual size of the ldt.
-__modify_ldt__ reads or writes the local descriptor table
-(
ldt) for a process
. The ldt is
a per-process memory
-management table used by
the i386 processor. For more
-information on
this table, see an Intel 386 processor
-handbook
.
+When ''func'' is 1,
__modify_ldt__ modifies one
ldt entry
. ''ptr'' points to
a ''modify_ldt_ldt_s'' structure and ''bytecount'' must equal
the size of
this structure
.
-
-When ''func'' is 0, __modify_ldt__ reads the ldt into
-the memory pointed to by ''ptr''. The number of bytes
-read is the smaller of ''bytecount'' and the actual size
-of the ldt.
-
-
-When ''func'' is 1, __modify_ldt__ modifies one ldt
-entry. ''ptr'' points to a ''modify_ldt_ldt_s''
-structure and ''bytecount'' must equal the size of this
-structure.
!!RETURN VALUE
-
-
-
-
-
-
+On success, __modify_ldt__ returns either the actual number of bytes read (for reading) or 0 (for writing). On failure, __modify_ldt__ returns -1 and sets ''errno''.
!!ERRORS
+;[ENOSYS]: ''func'' is neither 0 nor 1.
+;[EINVAL]: ''ptr'' is 0, or ''func'' is 1 and ''bytecount'' is not equal to the size of the structure ''modify_ldt_ldt_s'', or ''func'' is 1 and the new ldt entry has illegal values.
+;[EFAULT]: ''ptr'' points outside the address space.
-
-__ENOSYS__
-
-
-''func'' is neither 0 nor 1.
-
-
-__EINVAL__
-
-
-''ptr'' is 0, or ''func'' is 1 and ''bytecount'' is
-not equal to the size of the structure
-''modify_ldt_ldt_s'', or ''func'' is 1 and the new ldt
-entry has illegal values.
-
-
-__EFAULT__
-
-
-''ptr'' points outside the address space.
!!CONFORMING TO
+This call in Linux-specfic and should not be used in programs intended to be portable.
-
-This call in Linux-specfic and should not be used in
-programs intended to be portable.
!!SEE ALSO
-
-
vm86(2)
----
