FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=releng%2F10.2 2014-09-12T16:22:01Z 2014-09-12T16:22:01Z Konstantin Belousov kib@FreeBSD.org 2014-09-12T16:22:01Z urn:sha1:36b9190bd1d13ee0436ee2f6b0d51493027c80a8 Process STT_GNU_IFUNC when doing non-plt relocations. MFC r270802: Only do the second pass over non-plt relocations when the first pass found IFUNCs. Approved by: re (gjb) 2012-08-15T03:07:41Z Oleksandr Tymoshenko gonzo@FreeBSD.org 2012-08-15T03:07:41Z urn:sha1:c9e95645f623367fe9195f15b5b833d2e4717c88 Handle TLS for ARMv6 and ARMv7 2012-08-04T05:30:20Z Andrew Turner andrew@FreeBSD.org 2012-08-04T05:30:20Z urn:sha1:782b05f96b15a2d92336dd0bd8fc06dbc4638312 This is not strictly required with the current ABI but will be when we switch to the ARM EABI. The aapcs requires the stack to be 4 byte aligned at all times and 8 byte aligned when calling a public subroutine where the current ABI only requires sp to be a multiple of 4. 2012-04-30T13:31:10Z Konstantin Belousov kib@FreeBSD.org 2012-04-30T13:31:10Z urn:sha1:f62651920d526d8ef7a8ea66487e5bd1814a7a6f Based on dragonflybsd support for GNU hash by John Marino <draco marino st> Reviewed by: kan Tested by: bapt MFC after: 2 weeks 2012-03-20T13:20:49Z Konstantin Belousov kib@FreeBSD.org 2012-03-20T13:20:49Z urn:sha1:082f959ac8281d323f9289c45b769275e172c917 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 2012-03-11T20:03:09Z Konstantin Belousov kib@FreeBSD.org 2012-03-11T20:03:09Z urn:sha1:83aa9cc00c2d83d05a0efe7a1496d8aab4a153bb 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 2012-02-14T00:16:34Z Oleksandr Tymoshenko gonzo@FreeBSD.org 2012-02-14T00:16:34Z urn:sha1:dc3b6c3aa0d7d86596430cf284e0338577f47ea8 Reviewed by: cognet Obtained from: NetBSD 2011-12-12T11:03:14Z Konstantin Belousov kib@FreeBSD.org 2011-12-12T11:03:14Z urn:sha1:6be4b697152616e174e381a763ed2128eafca8a0 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 2011-01-25T21:12:31Z Konstantin Belousov kib@FreeBSD.org 2011-01-25T21:12:31Z urn:sha1:cb38d4941c45e3c72c4b5b3fad87d297d950cf53 __pthread_map_stacks_exec() on architectures that allow executable stacks. Reported and tested by: marcel (ia64) 2010-12-25T08:51:20Z Konstantin Belousov kib@FreeBSD.org 2010-12-25T08:51:20Z urn:sha1:8569deaf1cba0d732647f0dae7eb5af2ee5fae1b 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)