Commit Graph

72 Commits

Author SHA1 Message Date
Nick Kralevich
d9ad62343c Add linker support for PIE
Modify the dynamic linker so that executables can be loaded
at locations other than 0x00000000.

Modify crtbegin* so that non-PIC compilant "thumb interwork
veneers" are not created by the linker.

Bug: 5323301
Change-Id: Iece0272e2b708c79034f302c20160e1fe9029588
2011-10-22 13:19:23 -07:00
Mathias Agopian
bda5da074e fix prototype of dladdr
this breaks C++ source code in particular.

Change-Id: Ie06b5d31d23b5455e6950c470adc64dd5e7784df
2011-09-28 12:17:34 -07:00
David 'Digit' Turner
96e5faccdc am 91966c30: am 0acdbe08: am 89ea107d: Merge "linker: allow debugging of constructors"
* commit '91966c30efbdc7feecd6c45a46ab488e715c0a35':
  linker: allow debugging of constructors
2011-08-30 09:50:54 -07:00
David 'Digit' Turner
91966c30ef am 0acdbe08: am 89ea107d: Merge "linker: allow debugging of constructors"
* commit '0acdbe0892105d01a38de9baf4e34eef22b8259c':
  linker: allow debugging of constructors
2011-08-29 18:01:05 -07:00
David 'Digit' Turner
e5ea45547e linker: allow debugging of constructors
This patch allows the debugging of constructors in shared
libraries and executables. It does so by ensuring that the
corresponding binary is visible to gdb before running the
constructors.

Change-Id: I0a3df726a04ad109944c834dcbba672b85d3991e
2011-08-27 10:21:01 +02:00
Shih-wei Liao
48527c3f74 Revert "Revert "linker: get rid of the buddy allocator""
This reverts commit f9a9cda23a.
This revert is promised once b/5039224, b/5036755, b/5036610 are resolved.
2011-07-17 12:32:43 -07:00
Nick Kralevich
f9a9cda23a Revert "linker: get rid of the buddy allocator"
This reverts commit 7059b1f02e.
Bug: 5036610
2011-07-15 16:12:45 -07:00
Nick Kralevich
7059b1f02e linker: get rid of the buddy allocator
Currently, the Android linker is placing shared libraries into
a well-known spot in memory.  This is interfering with the kernel's
ASLR support.

This change stops forcing non-prelinked libraries into a particular
address space.

Also, get rid of FLAG_PRELINKED.  As best I can tell, this flag
is never used.

Change-Id: I527af12fb54f821c2b5ca7693dbf63d022f8f4ae
2011-07-14 13:48:13 -07:00
David Turner
1af88c9743 am d004dc99: Merge "Use MAP_FIXED when allocating prelinked shared library regions"
* commit 'd004dc9957cd8944d3db8ed92544c8ee65b117ca':
  Use MAP_FIXED when allocating prelinked shared library regions
2011-05-02 12:34:57 -07:00
Chris Dearman
db4bce0549 Use MAP_FIXED when allocating prelinked shared library regions
Prelinked libraries must be mapped to a fixed address. MAP_FIXED is ignored
for non-prelinked libraries (si->base==0)

Signed-off-by: Raghu Gandham <raghu@mips.com>
2011-03-10 10:48:14 -08:00
Kenny Root
72f9a5c374 Increase SO_MAX to accomodate valgrind
system_server loads up 87 shared libraries upon start. Running under
valgrind pushes this just over the edge of 96. Increase SO_MAX to 128 to
give us some more headroom.

Change-Id: Iadceb14ab6d9621bdccd292570d50867828057d9
2011-02-10 17:02:23 -08:00
David 'Digit' Turner
be5755969d linker: Remove unsecure env. variable for setuid programs.
This removes several unsecure environment variables from the
environment block when the program being loaded is setuid. The
list of env. variables is the same than what GLibc uses at this
point.

Change-Id: I456d3ea0880fe0d4de0d3c5dd51871dd36e87fd6
2010-12-20 12:06:45 +01:00
Brian Swetland
fedbcde6ef add /vendor support
- add /vendor/lib to front of default library search path
- remove long-obsolete /lib from default library search path

Change-Id: I7d33bf899be018e7cc4c213d5790bbd991023a62
2010-09-19 03:39:13 -07:00
Dima Zavin
a716190241 linker: fix overwriting the real linker error string
Change-Id: Ia9165fd9aa1951b2bb81d0ac8f5bb3057aded8bd
Signed-off-by: Dima Zavin <dima@android.com>
2010-08-17 15:57:55 -07:00
David 'Digit' Turner
6774809b62 linker: Support dlopen(NULL, ...) properly.
Change-Id: Icba37823cb350c34848cc466d144c3a0af87c94c
2010-07-23 12:16:15 -07:00
Jean-Baptiste Queru
f439445830 fix build
Change-Id: I243c98e20a250e0d40d481f16af481ff070219fd
2010-05-12 10:05:59 -07:00
The Android Open Source Project
bb7928ccda merge from open-source master
Change-Id: Iecfd2bd3069f70bbe508042cc249fcf7ff24800d
2010-05-12 09:22:50 -07:00
Matt Fischer
4fd42c1dc0 Added support for LD_PRELOAD
The LD_PRELOAD environment variable allows the user to specify a list of
libraries which should be unconditionally loaded before any others.  This
makes possible some useful tricks, such as library interposers.

Change-Id: I433d775ab08ef63a5fbe7b21f87a5642954fc32f
2010-05-10 15:09:19 -07:00
The Android Open Source Project
5ef5272be9 merge from open-source master
Change-Id: I518bb4ae9d7269957365561d4d609f22cde519db
2010-04-21 09:10:08 -07:00
Matt Fischer
1698d9ebfc Fixed support for RTLD_NEXT in dlsym()
The previous implementation of this flag was broken--it behaved identically
to RTLD_DEFAULT.  This adds a proper implementation, which examines the address
of the calling function, and uses it to determine which library to use to begin
the symbol search process.

Change-Id: I2ad2b46363f68932af63a3828a22f9c7987eea67
2010-04-08 10:14:47 -05:00
The Android Open Source Project
d046725133 merge from open-source master
Change-Id: I483fedf77d978b1c6e52d73eebc14f011bb9f809
2010-03-31 14:19:51 -07:00
Min-su, Kim
3cab22c8cf linker: fix the undefined weak symbols issue 2010-03-29 15:43:09 -07:00
The Android Open Source Project
377d4c979d merge from open-source master
Change-Id: I70266ee8c520b216773f267e46c8273d2334c31d
2010-03-22 15:55:09 -07:00
Matt Fischer
e2a8b1fd19 Added support for dladdr()
dladdr() is a GNU extension function, which allows the caller to retrieve
symbol information for a specified memory address.  It is useful for things
like generating backtrace information at runtime.

Change-Id: I3a1def1a6c9c666d93e1e97b7d260dfa5b9b79a9
2010-03-17 16:11:37 -05:00
David 'Digit' Turner
5c734644ee Fix debug output in the dynamic linker.
This provides a mini-printf implementation that reduces the
size of the dynamic linker by 25 KB, by preventing the drag of
formatting-related routines from the C library.

Also allow traces to be sent to the log, instead of stdout.

NOTE: You now need to modify Android.mk to enable/disable debug
      output.
2010-02-11 10:46:48 -08:00
Iliyan Malchev
e100f52f4a bionic/linker: rename ba_prelink to ba_nonprelink
-- fixes b/2432550
-- ba_prelink is used to manage non-prelinked libraries, hence ba_nonprelink is
   a more appropriate name for it

Signed-off-by: Iliyan Malchev <malchev@google.com>
2010-02-10 19:14:35 -08:00
David 'Digit' Turner
a3de55c831 am fe62de1a: Add support for R_ARM_REL32 to the dynamic linker.
Merge commit 'fe62de1ad036a1417df44b7b1a7c65cc79dc7091' into eclair-plus-aosp

* commit 'fe62de1ad036a1417df44b7b1a7c65cc79dc7091':
  Add support for R_ARM_REL32 to the dynamic linker.
2009-12-02 11:17:29 -08:00
David 'Digit' Turner
fe62de1ad0 Add support for R_ARM_REL32 to the dynamic linker.
Merged from eclair-mr2
2009-12-02 10:54:53 -08:00
David 'Digit' Turner
83d3d7491a am ebf3ea00: am 34ea5117: Add support for R_ARM_REL32 to the dynamic linker.
Merge commit 'ebf3ea006e5367fff93d2491eec24c4b1a633805'

* commit 'ebf3ea006e5367fff93d2491eec24c4b1a633805':
  Add support for R_ARM_REL32 to the dynamic linker.
2009-11-17 16:16:52 -08:00
David 'Digit' Turner
ebf3ea006e am 34ea5117: Add support for R_ARM_REL32 to the dynamic linker.
Merge commit '34ea5117dbeba41ae5dfdfb2c2ec8cae23388b66' into eclair-mr2-plus-aosp

* commit '34ea5117dbeba41ae5dfdfb2c2ec8cae23388b66':
  Add support for R_ARM_REL32 to the dynamic linker.
2009-11-17 16:06:26 -08:00
David 'Digit' Turner
34ea5117db Add support for R_ARM_REL32 to the dynamic linker. 2009-11-17 14:56:26 -08:00
Jean-Baptiste Queru
b152dde4ca am 83362689: merge from open-source master
Merge commit '83362689f5b1f6393d376d242fe29541b63ead2d'

* commit '83362689f5b1f6393d376d242fe29541b63ead2d':
  added and modified linker to support SuperH architecture
  Add the BSD sys_signame array.
  added and modified bionic code to support SuperH architecture
2009-11-09 12:07:54 -08:00
Jean-Baptiste Queru
83362689f5 merge from open-source master 2009-11-09 08:04:48 -08:00
Jean-Baptiste Queru
10be95cffc merge from open-source master 2009-11-08 16:09:17 -08:00
Shin-ichiro KAWASAKI
ad13c57298 added and modified linker to support SuperH architecture 2009-11-06 10:36:37 +09:00
Doug Kwan
e823807dc2 Add weak symbol support. Also fix a bug caused by a typo. 2009-10-26 12:05:23 -07:00
Iliyan Malchev
f1729553e3 am 9e78de3e: am 70bba516: am 763ac283: Merge changes Ibcba4b4f,I9af341e1 into eclair
Merge commit '9e78de3e3c90ec3c2970431d8eae7378fdc0dac6'

* commit '9e78de3e3c90ec3c2970431d8eae7378fdc0dac6':
  bionic/linker: make the buddy allocator compute max_order on its own
  bionic/linker: change the buddy allocator to take a handle to the managed area
2009-10-23 18:58:19 -07:00
Iliyan Malchev
9e78de3e3c am 70bba516: am 763ac283: Merge changes Ibcba4b4f,I9af341e1 into eclair
Merge commit '70bba5160f83ecd6251c4539f747ae39e9ed469c' into eclair-mr2-plus-aosp

* commit '70bba5160f83ecd6251c4539f747ae39e9ed469c':
  bionic/linker: make the buddy allocator compute max_order on its own
  bionic/linker: change the buddy allocator to take a handle to the managed area
2009-10-23 18:49:14 -07:00
Iliyan Malchev
53b32f8b7e am 763ac283: Merge changes Ibcba4b4f,I9af341e1 into eclair
Merge commit '763ac28357f604e0e4196e0a7ad5b0f5cdcf274a' into eclair-plus-aosp

* commit '763ac28357f604e0e4196e0a7ad5b0f5cdcf274a':
  bionic/linker: make the buddy allocator compute max_order on its own
  bionic/linker: change the buddy allocator to take a handle to the managed area
2009-10-23 18:39:30 -07:00
Doug Kwan
943043583a Clean up some linker code. 2009-10-23 18:11:40 -07:00
Iliyan Malchev
bb9eedeff4 bionic/linker: make the buddy allocator compute max_order on its own
Signed-off-by: Iliyan Malchev <malchev@google.com>
2009-10-19 18:10:35 -07:00
Iliyan Malchev
af7315acf6 bionic/linker: change the buddy allocator to take a handle to the managed area
-- rename struct ba_info to struct ba
-- move the static ba descriptor from ba.c to linker.c and rename it ba_prelink
-- ba_init, ba_allocate, ba_free, ba_start_addr, and ba_len all take a pointer
   to struct ba

Signed-off-by: Iliyan Malchev <malchev@google.com>
2009-10-19 18:10:35 -07:00
David 'Digit' Turner
5d436ddcae am 8213d5c3: am ff7b46b8: Merge change I3c998761 into eclair
Merge commit '8213d5c3c072b23f5cc1922d232efe7338091d9b' into eclair-mr2-plus-aosp

* commit '8213d5c3c072b23f5cc1922d232efe7338091d9b':
  Allow the dynamic linker to relocate references to thumb symbols in NDK libraries.
2009-10-16 12:46:51 -07:00
David 'Digit' Turner
cd23098828 am ff7b46b8: Merge change I3c998761 into eclair
Merge commit 'ff7b46b87c4d85881d88c2105a94be6c6accb628' into eclair-plus-aosp

* commit 'ff7b46b87c4d85881d88c2105a94be6c6accb628':
  Allow the dynamic linker to relocate references to thumb symbols in NDK libraries.
2009-10-16 12:36:27 -07:00
Jean-Baptiste Queru
73981476a3 merge from open-source master 2009-10-14 08:18:23 -07:00
David 'Digit' Turner
3c99876116 Allow the dynamic linker to relocate references to thumb symbols in NDK libraries.
The lowest bit of the symbol's value should be ignored when looking at UNDEF symbols
for correctness. It is used as an ARM/Thumb flag by the linker.
2009-10-13 16:55:18 -07:00
Iliyan Malchev
4a9afcb101 bionic/linker: allow resolving of symbols from library back to executable
Signed-off-by: Iliyan Malchev <malchev@google.com>
2009-09-29 14:33:46 -07:00
Iliyan Malchev
9ea64da6c5 bionic/linker: change lookup() to return soinfo, not base 2009-09-29 14:33:46 -07:00
Iliyan Malchev
6ed80c8814 Revert "Revert "bionic/linker: fix symbol lookup during relocations""
This reverts commit 33acbf0719.
2009-09-29 14:33:46 -07:00
Mathias Agopian
33acbf0719 Revert "bionic/linker: fix symbol lookup during relocations"
This reverts commit 8d0c0334f1.
2009-09-27 22:04:15 -07:00