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10 Commits

Author SHA1 Message Date
Jiyong Park 31cd08f9eb dynamic linker is running for init 
init is now built as a dynamic executable, so the dynamic linker has to
be able to run in the init process. However, since init is launched so
early, even /dev/* and /proc/* file systems are not mounted and thus
some APIs that rely on the paths do not work. The dynamic linker now
goes alternative path when it is running in the init process.

For example, /proc/self/exe is not read for the init since we always now
the path of the init (/init). Also, arc4random* APIs are not used since
the APIs rely on /dev/urandom. Linker now does not randomize library
loading order and addresses when running in the init process.

Bug: 80454183
Test: `adb reboot recovery; adb devices` shows the device ID
Change-Id: I29b6d70e4df5f7f690876126d5fe81258c1d3115
 2018-06-08 14:50:14 +09:00
Elliott Hughes cbc80ba9d8 Switch the rest of our internal headers to #pragma once. 
We've been using #pragma once for new internal files, but let's be more bold.

Bug: N/A
Test: builds
Change-Id: I7e2ee2730043bd884f9571cdbd8b524043030c07
 2018-02-13 14:27:17 -08:00
Dimitry Ivanov 4cabfaad34 Load namespace configuration from ld.config.txt 
This change allows customization of default namespace
configuration for different executables. It also enables
target_sdk_version setup for binaries (note that this
option should explicitly be enabled in ld.config.txt).

Bug: http://b/30706810
Bug: http://b/30435785
Test: run linker-unit-tests/bionic-unit-tests, boot angler
Change-Id: Ibbe87209acf1538fc9cec04944f3d22a190c38f1
 2017-03-24 15:50:45 -07:00
Dimitry Ivanov 2a6d9b2543 Extract format_string function. 
Extract format_string function and add a test.

Test: run linker-unit-tests
Change-Id: I794a29aaf62e184438ce1a9224b88aa0586c17b5
 2017-03-13 16:25:51 -07:00
Dimitry Ivanov bcc4da9b75 Unify linker files under one license (BSD) 
Historically we had part of the linker licensed under BSD and
another part under Apache 2 license. This commit makes all the
linker code licensed under BSD license.

Test: m
Change-Id: I11b8163ae75966b5768d3fe992679de376106515
 2017-02-15 15:35:33 -08:00
Dimitry Ivanov 48ec288d40 Extract soinfo and globals to separate files. 
Move soinfo and globals out of linker.cpp to
separate files.

Breaking up huge linker.cpp into smaller peaces
in order to make it easier to extract part of the
code that belongs to libdl.so and remove parts of
the code that do not belong to linker

(refactoring part 2 of many)

Change-Id: I868417f4b8d2b84d0e8265e354bc7977161497e2
 2016-08-08 16:12:53 -07:00
Dimitry Ivanov 284ae3559e Add permitted_when_isolated_path to linker namespaces 
The permitted_when_isolated_path is a way to white-list
directories not present in search-path. It is ignored for
not isolated namespaces.

Bug: http://b/25853516
Bug: http://b/22548808
Change-Id: Ib1538037268eea69323ea49968a34a4a1d1938a5
 2015-12-09 13:54:01 -08:00
Dmitriy Ivanov 84bab5a955 Move some utility functions to linker_utils 
Also adds unit-tests for page_start, page_offset, and safe_add

Change-Id: Ia1325b4682d367328a01599a19848e4ffcd2c0ea
 2015-11-20 21:37:51 +00:00
Dmitriy Ivanov 42d5fcb9f4 Introducing linker namespaces 
Bug: http://b/22548808
Change-Id: Ia3af3c0a167f1d16447a3d83bb045d143319b1e1
 2015-11-15 12:09:16 -08:00
Dmitriy Ivanov a1feb117e4 Make dt_runpath work for libraries opened from apk 
This patch also fixes realpath for libraries opened directly
from apks.

Bug: http://b/21960914
Bug: http://b/21961857
Change-Id: I35ade661c87f1d448191f385811f6e9fd3cacf11
 2015-10-07 11:44:53 -07:00