Do not skip RTLD_LOCAL libraries in dlsym(RTLD_DEFAULT, ...)
if the library is opened by application with target api level <= 22
Bug: http://b/21565766
Bug: http://b/17512583
Change-Id: Ic45ed1e4f53e84cba9d74cab6b0049c0c7aa8423
This applies for apps targeting sdk<=22 and
only for lp32 platforms.
Bug: http://b/21364029
Change-Id: I903e81c9ccda2a8beaba1d132d68c77d30a4cdb2
(cherry picked from commit d974e88046)
Linker used to skip RTLD_NEXT within local_group when
caller->next is nullptr (which represents load order
but not the order within local_group dependency tree)
Bug: http://b/21380474
Change-Id: I178fc4657b19bceb871635b177c1df67855b1708
(cherry picked from commit b96ac41b32)
According to the comments in Posix_close(), TEMP_FAILURE_RETRY() should
not be used with close():
462bdac45c%5E%21/#F12
Kill ScopedFd by simplifying the single caller.
Bug: http://b/20501816
Change-Id: I248c40b8c2fc95f1938a6edfc245c81847fc44af
Signed-off-by: Spencer Low <CompareAndSwap@gmail.com>
(cherry picked from commit 0346ad7a4f)
Answers the question: what if dependent library
was preloaded with RTLD_LOCAL flag.
Also add test for RTLD_NEXT within local_group.
Bug: http://b/17512583
Change-Id: I79e081e68b3a8c0ed8980d4275a06515fea94ec9
(cherry picked from commit 697bd9fd38)
There's no reason to have multiple years in our own copyright headers,
and given the stupidity of our NOTICE file generation, it just creates
more junk.
Change-Id: I065a3811c2e2584e3b649a18ad9460286bc72b92
(cherry picked from commit c69ace87ec)
Use one instance of VersionTracker per link (instead of 2).
Change-Id: I6860013df65f5969975c82ebdae8bd90a82e0a82
(cherry picked from commit 7e4bbbae4a)
We did not set DF_1_GLOBAL flag for LD_PRELOADed
libraries which led to the situation when ld_preloads
where ignored during on dlopen()
Change-Id: I696b3b2506a8ed4c0984ad2c803210a7a4f8e686
(cherry picked from commit f8093a9485)
This is to make getenv() work correctly.
Bug: http://b/20567629
(cherry picked from commit a85bcc2e99)
Change-Id: I7c2289279b331793335029dc17a792d416efff4b
This change adds realpath to soinfo and
extends limit on filenames from 128 to PATH_MAX.
It also removes soinfo::name field, linker uses
dt_soname instead.
Bug: http://b/19818481
Bug: https://code.google.com/p/android/issues/detail?id=80336
Change-Id: I9cff4cb5bda3ee2bc74e1bbded9594ea7fbe2a08
This flag allows to force loading of the library
in the case when for some reason multiple ELF files
share the same filename (because the already-loaded
library has been removed and overwritten, for example).
Change-Id: I798d44409ee13d63eaa75d685e99c4d028d2b0c1
When the Android dynamic linker handles a text relocation,
it first relaxes the permissions on the segment being modified,
performs the modifications, and then restores the page permissions.
The relaxation worked by adding PROT_WRITE to whatever protection
bits were set in the section. In effect, the pages were getting set
to PROT_READ|PROT_WRITE|PROT_EXEC, modified, then restored to
PROT_READ|PROT_EXEC
The SELinux kernel code differentiates between 4 different kinds
of executable memory:
* Executable stack (execstack)
* Executable heap (execheap)
* File-based executable code which has been modified (execmod)
* All other executable memory (execmem)
The execmod capability is only triggered by the kernel when a
dirty but non-executable mmap()ed page becomes executable. When that
occurs, an SELinux policy check is done to see if the execmod capability
is provided by policy.
However, if the page is already executable, and PROT_WRITE is added
to the page, it's considered an execmem permission check, not an execmod
permission check.
There are certain circumstances where we may want to distinguish between
execmod and execmem. This change adjusts the dynamic linker to avoid
using RWX pages, so that an RX -> RW -> RX transition will properly
be detected as an execmod permission check instead of an execmem permission
check.
Bug: 20013628
Change-Id: I14d7be29170b156942f9809023f3b2fc1f37846c
