| 183ad9df536ab04ef35a397a1f4724e4e401d11f |
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27-Feb-2014 |
Torne (Richard Coles) <torne@google.com> |
Allow sharing the RELRO section via a file.
Add flags and a file descriptor to android_dlopen_ext() to allow writing
the RELRO section of the loaded library to a file after relocation
processing, and to allow mapping identical pages from the file over the
top of relocated memory in another process. Explicitly comparing the
pages is required in case a page contains a reference to a symbol
defined in another library loaded at a random base address.
Bug: 13005501
Change-Id: Ibb5b2d384edfaa5acf3e97a5f8b6115c10497a1e
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| 12bbb9164578b6512b8b07a3fb093858244b7c7b |
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06-Feb-2014 |
Torne (Richard Coles) <torne@google.com> |
Support loading libraries to a reserved address.
Add flags and parameters to android_dlopen_ext() to allow loading a
library at an already-reserved fixed address. If the library to be
loaded will not fit within the space reserved, then the linker will
either fail, or allocate its own address space as usual, according to
which flag has been specified. This behaviour only applies to the
specific library requested; any other libraries loaded as dependencies
will be loaded in the normal fashion.
There is a new gtest included to cover the functionality added.
Bug: 13005501
Change-Id: I5d1810375b20fc51ba6a9b3191a25f9792c687f1
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| 0266ae5f884d72da58f33a072e865ba131234a5e |
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11-Feb-2014 |
Elliott Hughes <enh@google.com> |
Switch <elf.h> over to linux uapi under the covers.
Remove the linker's reliance on BSD cruft and use the glibc-style
ElfW macro. (Other code too, but the linker contains the majority
of the code that needs to work for Elf32 and Elf64.)
All platforms need dl_iterate_phdr_static, so it doesn't make sense
to have that part of the per-architecture configuration.
Bug: 12476126
Change-Id: I1d7f918f1303a392794a6cd8b3512ff56bd6e487
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| 4eeb1f12a8b63afc0d0ad4d466b16fbffb21cd5a |
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26-Oct-2013 |
Elliott Hughes <enh@google.com> |
Clean up linker architecture macros.
We don't need our own architecture macros; the standard ones will do.
This patch also fixes some __x86_64__ tests to be USE_RELA tests instead,
because they're not actually x86_64-specific.
I've cleaned up architecture-specific code slightly so where possible
all the code corresponding to a particular architecture is together.
This patch also fixes a bug in LP64 DT_PLTGOT handling, which should be
an error rather than falling through into DT_DEBUG! There was another #ifdef
bug where we'd only report unexpected DT_ entries on MIPS.
Change-Id: Id1d04e372611f641c1aa278a18e379f28af9eaf5
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| c00f2cb587630d5e954c7f548749f1e3170b3cb1 |
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05-Oct-2013 |
Elliott Hughes <enh@google.com> |
x86_64 linker.
Based on I8dc3e2cb596f75dc58ae82e4dc58f8c177dd3323 by
Pavel Chupin <pavel.v.chupin@intel.com>.
Change-Id: Icd582d277cbe273477b450f2848343d72c86ec9f
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| c620059479c47a78d57086d73726c9adc2f337ad |
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01-Oct-2013 |
Elliott Hughes <enh@google.com> |
Remove 32-bit assumptions from the ELF code.
Change-Id: I2c1f3d34c33685799aade8866eec44479ff9f963
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| e7dffe150b3c1c835c669ec03965e37fead13de7 |
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11-Jan-2013 |
Brian Carlstrom <bdc@google.com> |
Honor p_vaddr if set
(cherry picked from commit 88ff15c2c279d2bbe3569101b36cd2aa0931a0a9)
Change-Id: I4aabbe911d30aea8ace69e29bb6e980a4e89de90
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| 650be4e584eeab3591b9e273bfd6d169eea60853 |
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06-Mar-2013 |
Elliott Hughes <enh@google.com> |
More linker cleanup.
Change-Id: I9fb3c7c0d4b4ffef0eeaf092d4e30ffe63a08671
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| d4ee82dfa3ba01baa10e3ca48fcb31a27b8a4e81 |
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01-Mar-2013 |
Brian Carlstrom <bdc@google.com> |
Minor linker cleanup, primarily to use Elf32_Dyn
Change-Id: Ifa9408e9859c6f79444715bed4808b7c13fdced5
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| cf23905a4bcc7bfdd109be5b6d69ad06877aa217 |
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12-Jan-2013 |
Chris Dearman <chris@mips.com> |
[MIPS] Set DT_DEBUG dyntab entry if it is writable
This is primarily for MIPS exutables that do not have a
DT_MIPS_RLD_MAP entry.
Change-Id: I4c221d92debcfed961eeee2515123f3fb21ec8e6
Signed-off-by: Chris Dearman <chris@mips.com>
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| 18a206c81d9743481e364384affd43306911283d |
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30-Oct-2012 |
Elliott Hughes <enh@google.com> |
More dynamic linker cleanup.
I still want to break linker_format out into its own library so we can reuse
it for malloc debugging and so forth. (There are many similar pieces of code
in bionic, but the linker's one seems to be the most complete/functional.)
Change-Id: If3721853d28937c8e821ca1d23cf200e228a409a
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| 12c78bbded8ec03f821dfa09174464c04836e4ea |
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14-Aug-2012 |
Ard Biesheuvel <ard.biesheuvel@gmail.com> |
linker: avoid clobbering the .dynamic section of shared libs
This patch removes the DT_NEEDED hack which stores pointers
to soinfo structs in the .dynamic section of the library
being loaded.
Instead, it caches the soinfo struct pointers on the stack
during relocation time. After relocation time, i.e. when
calling constructors and destructors of the shared library
and its dependencies, uncached access is used instead,
doing lookups using the string table entries pointed to by
the DT_NEEDED entries.
By removing this hack, it is no longer needed to undo the
PT_GNURELRO protection, i.e., all non-writable mappings
can remain non-writable during their entire lifespan.
Even though, strictly speaking, the algorithmic complexity
has increased somewhat, the real-world adverse effect
is negligible on the systems I have tested.
Change-Id: I2361502560b96b5878f7f94a8e8a215350d70d64
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@gmail.com>
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| 4688279db5dcc4004941e7f133c4a1c3617d842c |
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04-Aug-2012 |
Elliott Hughes <enh@google.com> |
Clean up the linker a bit, remove prelinking support.
Also make the errors more readable, since none of us seemed to know
what they actually meant. The new style is still as verbose as the
old, but that's probably necessary in the absence of chained exceptions
in C. Here's what you'd see if you try to boot after removing
libsurfaceflinger.so:
32267 32267 E AndroidRuntime: java.lang.UnsatisfiedLinkError: Cannot load library: (linker.c:1629, pid 32259) soinfo_link_image: could not load library "libsystem_server.so" needed by "libandroid_servers.so"; caused by (linker.c:1629, pid 32259) soinfo_link_image: could not load library "libsurfaceflinger.so" needed by "libsystem_server.so"; caused by (linker.c:709, pid 32259) load_library: library "libsurfaceflinger.so" not found
This patch also fixes almost all of the compiler warnings.
Change-Id: I64bb59aed6d4e039c15ea45be2367f319ef879f8
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| c1bd559d5b0fdcc25db2b6ae2705914103b24699 |
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19-Jun-2012 |
David 'Digit' Turner <digit@google.com> |
linker: New sources to manage the ELF program header table.
This patch introduces two new source files containing a set of functions
to manage the program header table in an ELF binary, including the ability
to load PT_LOAD segments, and apply PT_GNU_RELRO protection.
Note: the files are not used currently, this will appear in a series
of future patches that will gradually modify linker.c to use
the phdr_table_xxx functions properly.
Change-Id: Ia3d4c1ff5fc3e265d8258b64b492f4e643f51bdc
|