src-test/libexec/rtld-elf/ia64, branch main

Remove ia64.

2014-07-07T00:27:09Z

This includes: o All directories named *ia64* o All files named *ia64* o All ia64-specific code guarded by __ia64__ o All ia64-specific makefile logic o Mention of ia64 in comments and documentation This excludes: o Everything under contrib/ o Everything under crypto/ o sys/xen/interface o sys/sys/elf_common.h Discussed at: BSDcan

Fix r264346 for ia64. We need to allocate memory for the function

2014-07-02T22:04:12Z

descriptors in order to relocate RTLD itself. To allocate memory, we need the pagesizes array initialized, but that happens after RTLD is relocated. This ordering is important for amd64, but it's opposite of what ia64 needs. Handle this conflict with the define called RTLD_INIT_PAGESIZES_EARLY. When defined, obtain the page sizes before relocating rtld, otherwise do it after.

Add GNU hash support for rtld.

2012-04-30T13:31:10Z

Based on dragonflybsd support for GNU hash by John Marino Reviewed by: kan Tested by: bapt MFC after: 2 weeks

Use xmalloc() instead of malloc() in the places where malloc() calls

2012-03-22T14:20:51Z

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

Fix several problems with our ELF filters implementation.

2012-03-20T13:20:49Z

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

Add support for preinit, init and fini arrays. Some ABIs, in

2012-03-11T20:03:09Z

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

Add support for STT_GNU_IFUNC and R_MACHINE_IRELATIVE GNU extensions to

2011-12-12T11:03:14Z

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

When loading dso without PT_GNU_STACK phdr, only call

2011-01-25T21:12:31Z

__pthread_map_stacks_exec() on architectures that allow executable stacks. Reported and tested by: marcel (ia64)

Implement support for ELF filters in rtld. Both normal and auxillary

2010-12-25T08:51:20Z

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 , nwhitehorn (powerpc)

Unbreak ia64.

2010-10-22T04:43:04Z
With r169630 I disabled symbol versioning because it broke rtld. With r211706 rtld got broken for ia64 & powerpc64. It was fixed for powerpc64 with r212497. In between, r211749 removed the exports table because the version script handled the exports. But wait, symbol versioning was disabled on ia64. With exports controlled by the version script and symbol versioning disabled, all symbols are exported and too many symbols bind to the definition in rtld. Let's just say that waird things happen. So, enable symbol versioning on ia64 and apply a work-around for the SIGSEGV that triggered r169630 to begin with: when rtld relocates itself, it comes across r_debug_state and for some reason can't find the definition. This causes a failure, relocation aborts and null pointers galore. The work-around is to ignore the missing definition when rtld is relocating itself and keep going. Maybe with the next binutils this will all go away. Maybe not, in which case I still need to figure out why r_debug_state cannot be found. BTW: r_debug_state is in the symbol map -- I don't think any other rtld symbols that rtld references are in the symbol map...