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7 Commits

Author SHA1 Message Date
Mark Johnston
0fc8a79672 linux: Unmap the VDSO page when unloading 
linux_shared_page_init() creates an object and grabs and maps a single
page to back the VDSO.  When destroying the VDSO object, we failed to
destroy the mapping and free KVA.  Fix this.

Reviewed by:	kib
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D28696
 2021-02-16 09:40:02 -05:00
Mateusz Guzik
1a18003240 compat: clean up empty lines in .c and .h files 2020-09-01 21:24:33 +00:00
Jeff Roberson
4504268a1b Fix the last few cases that grab without busy or valid. The grab functions must 
return the page in some held state for consistency elsewhere.

Reviewed by:	alc, kib, markj
Differential Revision:	https://reviews.freebsd.org/D22610
 2019-12-02 22:38:25 +00:00
Dmitry Chagin
c151945c86 Avoid using [LINUX_]SHAREDPAGE constant directly in the vdso code. 
This is needed for https://reviews.freebsd.org/D11780.

Reported by:	kib@
 2017-07-30 21:24:20 +00:00
Dmitry Chagin
5bb676adf7 Fix usage of the same 'i' variable in the external and nested loops. 
Submitted by: Svyatoslav <razmyslov at viva64.com>
Sponsored by: PVS-Studio

MFC after:	1 week
 2017-03-14 18:29:23 +00:00
Dmitry Chagin
36204c3016 Add 64 bit support to the vdso. 
Differential Revision:	https://reviews.freebsd.org/D1069
Reviewed by:	trasz
 2015-05-24 15:45:36 +00:00
Dmitry Chagin
bdc379344a Implement vdso - virtual dynamic shared object. Through vdso Linux 
exposes functions from kernel with proper DWARF CFI information so that
it becomes easier to unwind through them.
Using vdso is a mandatory for a thread cancelation && cleanup
on a modern glibc.

Differential Revision:	https://reviews.freebsd.org/D1060
 2015-05-24 15:28:17 +00:00