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modify_ldt.2: Tweaks after feedback from Andy Lutomirski 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2015-01-30 16:11:02 +01:00
parent 520789667e
commit c79a3031bb
1 changed files with 9 additions and 5 deletions
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14
man2/modify_ldt.2
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@ -100,7 +100,7 @@ field is the segment type (data, expand-down data, non-conforming code, or
conforming code).
The other fields match their descriptions in the CPU manual, although
.BR modify_ldt ()
cannot set the accessed bit.
cannot set the hardware-defined "accessed" bit described in the CPU manual.
.PP
A
.I user_desc
@ -119,7 +119,9 @@ and
.I limit
to 0.
.PP
A conforming code segment will be rejected if
A conforming code segment (i.e., one with
.IR contents==3 )
will be rejected if
.I
func
is 1 or if
@ -186,9 +188,11 @@ The normal use for
is to run legacy 16-bit or segmented 32-bit code.
Not all kernels allow 16-bit segments to be installed, however.
.SH BUGS
On 64-bit kernels before Linux 3.19, one of the padding bits in
.IR user_desc ,
if set, would prevent the descriptor from being considered empty.
On 64-bit kernels before Linux 3.19,
.\" commit e30ab185c490e9a9381385529e0fd32f0a399495
setting the "lm" padding bit in
.IR user_desc
prevents the descriptor from being considered empty.
.SH SEE ALSO
.BR arch_prctl (2),
.BR set_thread_area (2),