Provide a stub _rtld_call_ifunc when a platform doesn't use one of the
common ones or doesn't provide its own.

initfini array support for everyone.

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

ld.elf_so: Cite reference for Arm ELF relocations.

PR lib/58455: Missing references for processor-specific ELF
relocation semantics

branches: 1.18.2;
Fix interactions of initial-exec TLS model and dlopen

(1) If an initial-exec relocation was used for a non-local symbol
(i.e. the definition of the symbol is in a different DSO), the
computation of the static TLS offset used the wrong DSO.
This would effectively mean the wrong address was computed
(PR toolchain/50277, PR pkg/57445).

Fix this by forcing the computation of the correct DSO (the one defining
the symbol).

This code uses __UNCONST to avoid the vast interface changes for this
special case.

(2) If symbols from a DSO loaded via dlopen are used with both
global-dynamic/local-dynamic and initial-exec relocations AND
a initial-exec relocation was resolved first in a thread, a split brain
situation could exist where the dynamic relocations would use one memory
block (separate allocation) and the initial-exec relocations the static
per-thread TLS space.

(3) If the initial-exec relocation in (2) is seen after any thread has
already used a GD/LD allocation, bail out. Since IE relocations are used
only in the GOT, this will prevent the dlopen. This is a bit more
aggressive than necessary, but a full blown reference counting doesn't
seem to be justified.

branches: 1.17.2;
Whitespace. NFC.

Support ifunc on aarch64. The tests pass at least.

fix various typos in comments, documentation and messages.

Honor addend for R_AARCH64_TLS_TPREL relocation.

branches: 1.13.2;
Adapt https://svnweb.freebsd.org/base?view=revision&revision=342113 to
NetBSD.

This brings us resolving for dynamically loaded libraries and makes
tests/libexec/ld.elf_so/t_thread_local_dtor pass.

With suggestions from joerg@

Fix RTLD_DEBUG_RELOC build

Trailing whitespace

Revise previous to not deadlock.

Improve support for R_AARCH64_TLSDESC relocations.

In large part from FreeBSD.

Initialize new_value to account for bogus return from the function.

branches: 1.7.2; 1.7.4;
Various fixes / changes from Ryo Shimizu / Toru Nishimura to make this
work.

_rtld_call_ifunc copied from other rela platforms by me - not tested in
any way.

explain AARCH64 PLT design

- avoid caddr_t. use Elf_Addr instead.
- iron out rdbg() errors.

Add IRELATIVE support for ARM, X86 and PowerPC.

Replace COMBREL with just-in-time check in _rtld_relocate_nonplt_objects.

The COMBREL logic predates thread-safety of the dynamic linker and
breaks the use of shared locks for the common symbol lookup case. It is
unlikely to provide any benefit for lazy binding or PLT lookups, so
provide equivalent functionality in the non-PLT relocation handling loop
by checking if the symbol used by the current relocation is the same as
the one used during the last lookup. No inter-object cachine is done as
it is also unlikely to be benefical.

Testing with Firefox startup on AMD64 shows a small performance gain by
the new method.

branches: 1.2.8;
Add basic support for indirect functions. It allows providing a public
function symbol with an implementation choosen at run time.
Refactor calls to functions by address in ld.elf_so to create temporary
function descriptors on the stack, if the address is not leaked outside.

Limitations:
- no support for initialising static storage with function pointers
- no support for unnamed resolver functions

Inspired by FreeBSD's r228435 by kib@freebsd.org.

branches: 1.1.2; 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

ld.elf_so aarch64/rtld_start.S: Fix dynamic TLS fast path branch.

Bug found and patch prepared by pho@.

PR lib/58154

ld.elf_so aarch64/rtld_start.S: Sprinkle comments.

No functional change intended.

Prompted by PR lib/58154.

branches: 1.5.2; 1.5.4;
s/interger/integer/ and s/Compensatin/Compensation/ in comments.

branches: 1.4.2;
Adapt https://svnweb.freebsd.org/base?view=revision&revision=342113 to
NetBSD.

This brings us resolving for dynamically loaded libraries and makes
tests/libexec/ld.elf_so/t_thread_local_dtor pass.

With suggestions from joerg@

Improve support for R_AARCH64_TLSDESC relocations.

In large part from FreeBSD.

branches: 1.2.2; 1.2.4;
Various fixes / changes from Ryo Shimizu / Toru Nishimura to make this
work.

_rtld_call_ifunc copied from other rela platforms by me - not tested in
any way.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.