#
259065 |
|
07-Dec-2013 |
gjb |
- Copy stable/10 (r259064) to releng/10.0 as part of the 10.0-RELEASE cycle. - Update __FreeBSD_version [1] - Set branch name to -RC1
[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so start releng/10.0 at '100' so the branch is started with a value ending in zero.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
#
256281 |
|
10-Oct-2013 |
gjb |
Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
|
#
256101 |
|
07-Oct-2013 |
kib |
Implement support for the interpose dso flag.
Requested by: bf Reviewed by: kan Sponsored by: The FreeBSD Foundation MFC after: 1 week Approved by: re (glebius)
|
#
238471 |
|
15-Jul-2012 |
kib |
Import the DragonFly BSD commit 4f0bc915b65fcf5a23214f6d221d65c80be68ad4 by John Marino <draco@marino.st>, with the following (edited) commit message Date: Sat, 24 Mar 2012 06:40:50 +0100 Subject: [PATCH 1/1] rtld: Implement DT_RUNPATH and -z nodefaultlib
DT_RUNPATH is incorrectly being considered as an alias of DT_RPATH. The purpose of DT_RUNPATH is to have two different types of rpath: one that can be overridden by the environment variable LD_LIBRARY_PATH and one that can't. With the currently implementation, LD_LIBRARY_PATH will always trump any embedded rpath or runpath tags.
Current path search order by rtld: ================================== LD_LIBRARY_PATH DT_RPATH / DT_RUNPATH (always the same) ldconfig hints file (default: /var/run/ld-elf.so.hints) /usr/lib
New path search order by rtld: ============================== DT_RPATH of the calling object if no DT_RUNPATH DT_RPATH of the main binary if no DT_RUNPATH and binary isn't calling obj LD_LIBRARY_PATH DT_RUNPATH ldconfig hints file /usr/lib
The new path search matches how the linux runtime loader works. The other major added feature is support for linker flag "-z nodefaultlib". When this flag is passed to the linker, rtld will skip all references to the standard library search path ("/usr/lib" in this case but it could handle more color delimited paths) except in DT_RPATH and DT_RUNPATH.
New path search order by rtld with -z nodefaultlib flag set: ============================================================ DT_RPATH of the calling object if no DT_RUNPATH DT_RPATH of the main binary if no DT_RUNPATH and binary isn't calling obj LD_LIBRARY_PATH DT_RUNPATH ldconfig hints file (skips all references to /usr/lib)
FreeBSD notes: - we fixed some bugs which were submitted to DragonFly and merged there as commit 1ff8a2bd3eb6e5587174c6a983303ea3a79e0002; - we added LD_LIBRARY_PATH_RPATH environment variable to switch to the previous behaviour of considering DT_RPATH a synonym for DT_RUNPATH; - the FreeBSD default search path is /lib:/usr/lib and not /usr/lib.
Reviewed by: kan MFC after: 1 month MFC note: flip the ld_library_path_rpath default value for stable/9
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#
234841 |
|
30-Apr-2012 |
kib |
Add GNU hash support for rtld.
Based on dragonflybsd support for GNU hash by John Marino <draco marino st> Reviewed by: kan Tested by: bapt MFC after: 2 weeks
|
#
234840 |
|
30-Apr-2012 |
kib |
Split the symlook_obj1 into a loop iterating over the ELF object symbol hash elements, and a helper matched_symbol() which match the given hash entry and request, performing needed type and version checks.
Based on dragonflybsd support for GNU hash by John Marino <draco marino st> Reviewed by: kan Tested by: bapt MFC after: 2 weeks
|
#
233546 |
|
27-Mar-2012 |
kib |
Prevent rtld_verify_object_versions() from being called several times for the same object. This can happen when object is a dependency of the dlopen()ed dso. When called several times, we waste time due to unneeded processing, and memory, because obj->vertab is allocated anew on each iteration.
Reviewed by: kan MFC after: 2 weeks
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#
233361 |
|
23-Mar-2012 |
kib |
Remove superfluous extern keywords.
MFC after: 2 weeks
|
#
233307 |
|
22-Mar-2012 |
kib |
Use xmalloc() instead of malloc() in the places where malloc() calls are assumed to not fail.
Make the xcalloc() calling conventions follow the calloc(3) calling conventions and replace unchecked calls to calloc() with calls to xcalloc().
Remove redundand declarations from xmalloc.c, which are already present in rtld.h.
Reviewed by: kan Discussed with: bde MFC after: 2 weeks
|
#
233231 |
|
20-Mar-2012 |
kib |
Fix several problems with our ELF filters implementation.
Do not relocate twice an object which happens to be needed by loaded binary (or dso) and some filtee opened due to symbol resolution when relocating need objects. Record the state of the relocation processing in Obj_Entry and short-circuit relocate_objects() if current object already processed.
Do not call constructors for filtees loaded during the early relocation processing before image is initialized enough to run user-provided code. Filtees are loaded using dlopen_object(), which normally performs relocation and initialization. If filtee is lazy-loaded during the relocation of dso needed by the main object, dlopen_object() runs too earlier, when most runtime services are not yet ready.
Postpone the constructors call to the time when main binary and depended libraries constructors are run, passing the new flag RTLD_LO_EARLY to dlopen_object(). Symbol lookups callers inform symlook_* functions about early stage of initialization with SYMLOOK_EARLY. Pass flags through all functions participating in object relocation.
Use the opportunity and fix flags argument to find_symdef() in arch-specific reloc.c to use proper name SYMLOOK_IN_PLT instead of true, which happen to have the same numeric value.
Reported and tested by: theraven Reviewed by: kan MFC after: 2 weeks
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#
232974 |
|
14-Mar-2012 |
kib |
Rtld on diet 3.
Stop using strerror(3) in rtld, which brings in msgcat and stdio. Directly access sys_errlist array of errno messages with private rtld_strerror() function.
Now, $ size /libexec/ld-elf.so.1 text data bss dec hex filename 96983 2480 8744 108207 1a6af /libexec/ld-elf.so.1
Reviewed by: dim, kan MFC after: 2 weeks
|
#
232831 |
|
11-Mar-2012 |
kib |
Add support for preinit, init and fini arrays. Some ABIs, in particular on ARM, do require working init arrays.
Traditional FreeBSD crt1 calls _init and _fini of the binary, instead of allowing runtime linker to arrange the calls. This was probably done to have the same crt code serve both statically and dynamically linked binaries. Since ABI mandates that first is called preinit array functions, then init, and then init array functions, the init have to be called from rtld now.
To provide binary compatibility to old FreeBSD crt1, which calls _init itself, rtld only calls intializers and finalizers for main binary if binary has a note indicating that new crt was used for linking. Add parsing of ELF notes to rtld, and cache p_osrel value since we parsed it anyway.
The patch is inspired by init_array support for DragonflyBSD, written by John Marino.
Reviewed by: kan Tested by: andrew (arm, previous version), flo (sparc64, previous version) MFC after: 3 weeks
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#
230784 |
|
30-Jan-2012 |
kib |
Add support for GNU RELRO.
Submitted by: John Marino <draco marino st> MFC after: 2 weeks
|
#
229780 |
|
07-Jan-2012 |
uqs |
Spelling fixes for libexec/
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#
228435 |
|
12-Dec-2011 |
kib |
Add support for STT_GNU_IFUNC and R_MACHINE_IRELATIVE GNU extensions to rtld on 386 and amd64. This adds runtime bits neccessary for the use of the dispatch functions from the dynamically-linked executables and shared libraries.
To allow use of external references from the dispatch function, resolution of the R_MACHINE_IRESOLVE relocations in PLT is postponed until GOT entries for PLT are prepared, and normal resolution of the GOT entries is finished. Similar to how it is done by GNU, IRELATIVE relocations are resolved in advance, instead of normal lazy handling for PLT.
Move the init_pltgot() call before the relocations for the object are processed.
MFC after: 3 weeks
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#
228375 |
|
09-Dec-2011 |
kib |
Typo.
MFC after: 3 days
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#
225152 |
|
24-Aug-2011 |
kib |
Rtld links with the specially built pic static libc library to get some C runtime services, like printf(). Unfortunately, the multithread-safeness measures in the libc do not work in rtld environment.
Rip the kernel printf() implementation and use it in the rtld instead of libc version. This printf does not require any shared global data and thus is mt-safe. Systematically use rtld_printf() and related functions, remove the calls to err(3).
Note that stdio is still pulled from libc due to libmap implementaion using fopen(). This is safe but unoptimal, and can be changed later.
Reported and tested by: pgj Diagnosed and reviewed by: kan (previous version) Approved by: re (bz)
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#
218476 |
|
09-Feb-2011 |
kib |
Use sigsetjmp/siglongjmp with disabled signal mask access for lock upgrade in rtld. There is no need to care about the mask, which causes a lot of unneeded sigprocmask(2) calls during each symbol lookup.
|
#
217153 |
|
08-Jan-2011 |
kib |
In rtld, read the initial stack access mode from AT_STACKPROT as set by kernel, and parse PT_GNU_STACK phdr from linked and loaded dsos.
If the loaded dso requires executable stack, as specified by PF_X bit of p_flags of PT_GNU_STACK phdr, but current stack protection does not permit execution, the __pthread_map_stacks_exec symbol is looked up and called. It should be implemented in libc or threading library and change the protection mode of all thread stacks to be executable.
Provide a private interface _rtld_get_stack_prot() to export the stack access mode as calculated by rtld.
Reviewed by: kan
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#
216695 |
|
25-Dec-2010 |
kib |
Implement support for ELF filters in rtld. Both normal and auxillary filters are implemented.
Filtees are loaded on demand, unless LD_LOADFLTR environment variable is set or -z loadfltr was specified during the linking. This forces rtld to upgrade read-locked rtld_bind_lock to write lock when it encounters an object with filter during symbol lookup.
Consolidate common arguments of the symbol lookup functions in the SymLook structure. Track the state of the rtld locks in the RtldLockState structure. Pass local RtldLockState through the rtld symbol lookup calls to allow lock upgrades.
Reviewed by: kan Tested by: Mykola Dzham <i levsha me>, nwhitehorn (powerpc)
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#
214728 |
|
03-Nov-2010 |
kib |
If dlopen() is called for the dso that has been already loaded as a dependency, then the dso never has its DAG initialized. Empty DAG makes ref_dag() call in dlopen() a nop, and the dso refcount is off by one.
Initialize the DAG on the first dlopen() call, using a boolean flag to prevent double initialization.
From the PR (edited): Assume we have a library liba.so, containing a function a(), and a library libb.so, containing function b(). liba.so needs functionality from libb.so, so liba.so links in libb.so.
An application doesn't know about the relation between these libraries, but needs to call a() and b(). It dlopen()s liba.so and obtains a pointer to a(), then it dlopen()s libb.so and obtains a pointer to b().
As soon as the application doesn't need a() anymore, it dlclose()s liba.so.
Expected result: the pointer to b() is still valid and can be called Actual result: the pointer to b() has become invalid, even though the application did not dlclose() the handle to libb.so. On calling b(), the application crashes with a segmentation fault.
PR: misc/151861 Based on patch by: jh Reviewed by: kan Tested by: Arjan van Leeuwen <freebsd-maintainer opera com> MFC after: 1 week
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#
212497 |
|
12-Sep-2010 |
nwhitehorn |
Check for undefined weak symbols during PLT binding on powerpc64, and do not attempt to copy NULL function descriptors. This fixes LD_BIND_NOW on powerpc64 after r211706.
Reviewed by: kib
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#
199877 |
|
28-Nov-2009 |
kib |
Allow to load not-openable dso when tracing. This fixes ldd on such dso or dso linked to non-openable object. Remove '\n' at the end of error message. End comments with dot.
MFC after: 3 weeks (together with r199829)
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#
199829 |
|
26-Nov-2009 |
kib |
Implement rtld part of the support for -z nodlopen (see ld(1)).
Reviewed by: kan MFC after: 3 weeks
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#
194531 |
|
20-Jun-2009 |
kan |
Allow order of initialization of loaded shared objects to be altered through their .init code. This might happen if init vector calls dlopen on its own and that dlopen causes some not yet initialized object to be initialized earlier as part of that dlopened DAG.
Do not reset module reference counts to zero on final fini vector run when process is exiting. Just add an additional parameter to force fini vector invocation regardless of current reference count value if object was not destructed yet. This allows dlclose called from fini vector to proceed normally instead of failing with handle validation error.
Reviewed by: kib Reported by: venki kaps
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#
192922 |
|
27-May-2009 |
dfr |
Increase the size of the static TLS area slightly (required for the NVidia's OpenGL driver on amd64).
|
#
190543 |
|
30-Mar-2009 |
kib |
Implement support for RTLD_NODELETE flag for dlopen() and -z nodelete static linker option. Do it by incrementing reference count on the loaded object and its dependencies.
Reviewed by: davidxu, kan
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#
189959 |
|
18-Mar-2009 |
kib |
Implement the dynamic string token substitution in the rpath and soneeded pathes. The $ORIGIN, $OSNAME, $OSREL and $PLATFORM tokens are supported. Enabling the substitution requires DF_ORIGIN flag in DT_FLAGS or DF_1_ORIGIN if DF_FLAGS_1, that may be set with -z origin gnu ld flag. Translation is unconditionally disabled for setuid/setgid processes.
The $ORIGIN translation relies on the AT_EXECPATH auxinfo supplied by kernel.
Requested by: maho Tested by: maho, pho Reviewed by: kan
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#
177924 |
|
04-Apr-2008 |
imp |
MFp4: Add mips support for dynamic linking.
This code came from the merged mips2 and Juniper mips repositories. Warner Losh, Randall Seager, Oleksandr Tymoshenko and Olivier Houchard worked to merge, debug and integrate this code. This code may also contain code derived from NetBSD.
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#
168312 |
|
03-Apr-2007 |
kan |
Implement dl_iterate_phdr function. Convert boolean flags in internal Obj_Entry structure into bitfields. Properly check for loaded segment alignment in map_object.
|
#
153515 |
|
18-Dec-2005 |
kan |
Implement ELF symbol versioning using GNU semantics. This code aims to be compatible with symbol versioning support as implemented by GNU libc and documented by http://people.redhat.com/~drepper/symbol-versioning and LSB 3.0.
Implement dlvsym() function to allow lookups for a specific version of a given symbol.
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#
153504 |
|
18-Dec-2005 |
marcel |
Make our ELF64 type definitions match standards. In particular this means: o Remove Elf64_Quarter, o Redefine Elf64_Half to be 16-bit, o Redefine Elf64_Word to be 32-bit, o Add Elf64_Xword and Elf64_Sxword for 64-bit entities, o Use Elf_Size in MI code to abstract the difference between Elf32_Word and Elf64_Word. o Add Elf_Ssize as the signed counterpart of Elf_Size.
MFC after: 2 weeks
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#
142645 |
|
27-Feb-2005 |
dfr |
Attempt to free any static TLS space used by a shared library when it is unloaded. This allows applications which load and unload libraries like libGL.so.1 several times to work properly.
MFC after: 2 days
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#
133063 |
|
03-Aug-2004 |
dfr |
Add support for Thread Local Storage.
|
#
127250 |
|
20-Mar-2004 |
peter |
Add initial support for compiling a special 32 bit version of ld-elf.so.1 on 64 bit systems. Most of this involves using alternate paths, environment variables and diagnostic messages.
The build glue is seperate.
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#
119013 |
|
17-Aug-2003 |
gordon |
Prepend /lib to the builtin library search path in rtld.
|
#
116563 |
|
19-Jun-2003 |
mdodd |
Provide a mechanism for dumping relocation information.
Setting the LD_DUMP_REL_PRE or LD_DUMP_REL_POST environment variables cause rtld-elf to output a table of all relocations.
This is useful for debugging.
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#
116558 |
|
19-Jun-2003 |
mdodd |
Move MD function prototypes together.
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#
116557 |
|
19-Jun-2003 |
mdodd |
Fix warnings; no parameters in function prototypes.
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#
116511 |
|
18-Jun-2003 |
mdodd |
- Add support for DT_FLAGS. - Define various things from the most recent ELF spec.
|
#
115396 |
|
29-May-2003 |
kan |
Allow threading libraries to register their own locking implementation in case default one provided by rtld is not suitable.
Consolidate various identical MD lock implementation into a single file using appropriate machine/atomic.h.
Approved by: re (scottl)
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#
110804 |
|
13-Feb-2003 |
kan |
Implement dlinfo() function.
Introdice RTLD_SELF special handle and properly process it within dlsym() and dlinfo() functions.
The intention is to improve our compatibility with Solaris and to make a Java port easier.
Partially submitted by: phantom
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#
110801 |
|
13-Feb-2003 |
kan |
Remove /usr/lib/elf from a default search path. Move xprintf to malloc.c, it is only used there. Make static.
Submitted by: phantom
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#
85677 |
|
29-Oct-2001 |
peter |
Update rtld for the "new" ia64 ABI. In the old toolchain, the DT_INIT and DT_FINI tags pointed to fptr records. In 2.11.2, it points to the actuall address of the function. On IA64 you cannot just take an address of a function, store it in a function pointer variable and call it.. the function pointers point to a fptr data block that has the target gp and address in it. This is absolutely necessary for using the in-tree binutils toolchain, but (unfortunately) will not work with old shared libraries. Save your old ld-elf.so.1 if you want to use old ones still. Do not mix-and-match.
This is a no-op change for i386 and alpha.
Reviewed by: dfr
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#
85004 |
|
15-Oct-2001 |
dfr |
Add ia64 support. Various adjustments were made to existing targets to cope with a few interface changes required by the ia64. In particular, function pointers on ia64 need special treatment in rtld.
|
#
76296 |
|
05-May-2001 |
jdp |
Performance improvements for the ELF dynamic linker. These particularly help programs which load many shared libraries with a lot of relocations. Large C++ programs such as are found in KDE are a prime example.
While relocating a shared object, maintain a vector of symbols which have already been looked up, directly indexed by symbol number. Typically, symbols which are referenced by a relocation entry are referenced by many of them. This is the same optimization I made to the a.out dynamic linker in 1995 (rtld.c revision 1.30).
Also, compare the first character of a sought-after symbol with its symbol table entry before calling strcmp().
On a PII/400 these changes reduce the start-up time of a typical KDE program from 833 msec (elapsed) to 370 msec.
MFC after: 5 days
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#
76224 |
|
02-May-2001 |
obrien |
* include/elf.h has been repo copied to include/elf-hints.h, and it no longer includes machine/elf.h. * consumers of elf.h now use the minimalist elf header possible.
This change is motivated by Binutils 2.11.0 and too much clashing over our base elf headers and the Binutils elf headers.
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#
66056 |
|
19-Sep-2000 |
jdp |
Add support for dlsym(RTLD_DEFAULT, ...).
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#
63870 |
|
26-Jul-2000 |
jdp |
Revamp the code that calls shared libraries' init and fini functions. Formerly the init functions were called in the opposite of the order in which libraries were loaded, and libraries were loaded according to a breadth-first traversal of the dependency graph. That ordering came from SVR4.0, and it was easy to implement but not always sensible.
Now we do a depth-first walk over the dependency graph and call the init functions in an order such that each shared object's needed objects are initialized before the shared object itself. At the same time we build a list of finalization (fini) functions in the opposite order, to guarantee correct C++ destructor ordering whenever possible. (It may not be possible if dlopen and dlclose are used in strange ways, but we come as close as one can come.)
The need for this renovation has become apparent as more programs have started using multithreading. The multithreaded C library libc_r requires initialization, whereas the standard libc does not. Since virtually every other object depends on the C library, it is important that it get initialized first.
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#
62801 |
|
08-Jul-2000 |
jdp |
Solve the dynamic linker's problems with multithreaded programs once and for all (I hope). Packages such as wine, JDK, and linuxthreads should no longer have any problems with re-entering the dynamic linker.
This commit replaces the locking used in the dynamic linker with a new spinlock-based reader/writer lock implementation. Brian Fundakowski Feldman <green> argued for this from the very beginning, but it took me a long time to come around to his point of view. Spinlocks are the only kinds of locks that work with all thread packages. But on uniprocessor systems they can be inefficient, because while a contender for the lock is spinning the holder of the lock cannot make any progress toward releasing it. To alleviate this disadvantage I have borrowed a trick from Sleepycat's Berkeley DB implementation. When spinning for a lock, the requester does a nanosleep() call for 1 usec. each time around the loop. This will generally yield the CPU to other threads, allowing the lock holder to finish its business and release the lock. I chose 1 usec. as the minimum sleep which would with reasonable certainty not be rounded down to 0.
The formerly machine-independent file "lockdflt.c" has been moved into the architecture-specific subdirectories by repository copy. It now contains the machine-dependent spinlocking code. For the spinlocks I used the very nifty "simple, non-scalable reader-preference lock" which I found at
<http://www.cs.rochester.edu/u/scott/synchronization/pseudocode/rw.html>
on all CPUs except the 80386 (the specific CPU model, not the architecture). The 80386 CPU doesn't support the necessary "cmpxchg" instruction, so on that CPU a simple exclusive test-and-set lock is used instead. 80386 CPUs are detected at initialization time by trying to execute "cmpxchg" and catching the resulting SIGILL signal.
To reduce contention for the locks, I have revamped a couple of key data structures, permitting all common operations to be done under non-exclusive (reader) locking. The only operations that require exclusive locking now are the rare intrusive operations such as dlopen() and dlclose().
The dllockinit() interface is now deprecated. It still exists, but only as a do-nothing stub. I plan to remove it as soon as is reasonably possible. (From the very beginning it was clearly labeled as experimental and subject to change.) As far as I know, only the linuxthreads port uses dllockinit(). This interface turned out to have several problems. As one example, when the dynamic linker called a client-supplied locking function, that function sometimes needed lazy binding, causing re-entry into the dynamic linker and a big looping mess. And in any case, it turned out to be too burdensome to require threads packages to register themselves with the dynamic linker.
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#
60938 |
|
26-May-2000 |
jake |
Back out the previous change to the queue(3) interface. It was not discussed and should probably not happen.
Requested by: msmith and others
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#
60833 |
|
23-May-2000 |
jake |
Change the way that the queue(3) structures are declared; don't assume that the type argument to *_HEAD and *_ENTRY is a struct.
Suggested by: phk Reviewed by: phk Approved by: mdodd
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#
56780 |
|
28-Jan-2000 |
jdp |
When a threads package registers locking methods with dllockinit(), figure out which shared object(s) contain the the locking methods and fully bind those objects as if they had been loaded with LD_BIND_NOW=1. The goal is to keep the locking methods from requiring any lazy binding. Otherwise infinite recursion occurs in _rtld_bind.
This fixes the infinite recursion problem in the linuxthreads port.
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#
55687 |
|
09-Jan-2000 |
jdp |
Revamp the mechanism for enumerating and calling shared objects' init and fini functions. Now the code is very careful to hold no locks when calling these functions. Thus the dynamic linker cannot be re-entered with a lock already held.
Remove the tolerance for recursive locking that I added in revision 1.2 of dllockinit.c. Recursive locking shouldn't happen any more.
Mozilla and JDK users: I'd appreciate confirmation that things still work right (or at least the same) with these changes.
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#
55122 |
|
27-Dec-1999 |
jdp |
Add a new function dllockinit() for registering thread locking functions to be used by the dynamic linker. This can be called by threads packages at start-up time. I will add the call to libc_r soon.
Also add a default locking method that is used up until dllockinit() is called. The default method works by blocking SIGVTALRM, SIGPROF, and SIGALRM in critical sections. It is based on the observation that most user-space threads packages implement thread preemption with one of these signals (usually SIGVTALRM).
The dynamic linker has never been reentrant, but it became less reentrant in revision 1.34 of "src/libexec/rtld-elf/rtld.c". Starting with that revision, multiple threads each doing lazy binding could interfere with each other. The usual symptom was that a symbol was falsely reported as undefined at start-up time. It was rare but not unseen. This commit fixes it.
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#
50977 |
|
05-Sep-1999 |
jdp |
Make jdk-1.1.8 work again. It turns out that some code inside libjava peeks into the dynamic linker's private Obj_Entry structures. My recent changes introduced some new members near the front of the structures, causing libjava to get the wrong fields. This commit moves the new members toward the end of the structure so that the layout of the portion that is relevant to JDK remains the same as before.
I will work with the JDK porting team to see if we can come up with a less fragile way for them to do what they need to do. I understand the current approach was necessary in order to work around some limitations of the dynamic linker. Maybe it's not necessary any more.
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#
50610 |
|
29-Aug-1999 |
jdp |
Get the actual pathname of the dynamic linker from the executable's PT_INTERP program header entry, to ensure that gdb always finds the right dynamic linker.
Use obj->relocbase to simplify a few calculations where appropriate.
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#
50609 |
|
29-Aug-1999 |
jdp |
When checking to see if a shared object is already loaded, look for a device/inode match if no pathname match is found.
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#
50608 |
|
29-Aug-1999 |
jdp |
Revamp the symbol lookup algorithm to cope better with objects loaded separately by dlopen that have global symbols with identical names. Viewing each dlopened object as a DAG which is linked by its DT_NEEDED entries in the dynamic table, the search order is as follows:
* If the referencing object was linked with -Bsymbolic, search it internally. * Search all dlopened DAGs containing the referencing object. * Search all objects loaded at program start up. * Search all objects which were dlopened() using the RTLD_GLOBAL flag (which is now supported too).
The search terminates as soon as a strong definition is found. Lacking that, the first weak definition is used.
These rules match those of Solaris, as best I could determine them from its vague manual pages and the results of experiments I performed.
PR: misc/12438
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#
50476 |
|
27-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
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#
48871 |
|
17-Jul-1999 |
jdp |
Change many asserts into normal errors. They were all for conditions caused by invalid shared objects rather than by internal errors.
Enable format string mismatch checking for _rtld_error().
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#
45501 |
|
08-Apr-1999 |
jdp |
Eliminate all machine-dependent code from the main source body and the Makefile, and move it down into the architecture-specific subdirectories.
Eliminate an asm() statement for the i386.
Make the dynamic linker work if it is built as an executable instead of as a shared library. See i386/Makefile.inc to find out how to do it. Note, this change is not enabled and it might never be enabled. But it might be useful in the future. Building the dynamic linker as an executable should make it start up faster, because it won't have any relocations. But in practice I suspect the difference is negligible.
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38816 |
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04-Sep-1998 |
dfr |
Add alpha support.
Submitted by: John Birrell <jb@cimlogic.com.au> (with extra hacks by me) Obtained from: Probably NetBSD
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38740 |
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02-Sep-1998 |
jdp |
Suppress duplicate entries in ldd output.
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38467 |
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21-Aug-1998 |
jb |
Update this header to use the revamped elf headers which select Elf32 or Elf64 based on the inclusion of the machine dependent header.
I've left the addition of the extra fields to handle the relocation structures with addend for a separate commit after jdp has had a chance to review what I've done. The current change is needed to compile csu/alpha/crt1.c
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35529 |
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30-Apr-1998 |
dfr |
Add GDB support. The method and some of the code came from NetBSD's elf runtime linker.
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34193 |
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07-Mar-1998 |
jdp |
This commit was generated by cvs2svn to compensate for changes in r34192, which included commits to RCS files with non-trunk default branches.
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34192 |
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07-Mar-1998 |
jdp |
Import the ELF dynamic linker. This is the ElfKit version with quite a few enhancements and bug fixes. There are still some known deficiencies, but it should be adequate to get us started with ELF.
Submitted by: John Polstra <jdp@polstra.com>
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