TLS variant I archs need to fudge the offset by the size of the TCB.

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.

ld.elf_so: Make tls alloc debug messages more detailed and greppable.

XXX pullup-10

ld.elf_so: Sprinkle tls debug messages.

XXX pullup-10

Alignment. NFCI.

Use alignof and not size_t for platforms with non-natural base
alignments.

PR 54093: Align static TLS area to max_align_t.

branches: 1.12.2;
Do not compile __tls_get_addr() into ldd(1), which fixes ldd(1) crashing
on arm after switching to new jemalloc.

jemalloc invokes __tls_get_addr() under some condition. If anything other
than ld.elf_so nor libc exports it, inconsistency arises as a result.

branches: 1.11.6;
Fix two bugs related to promotion of DSO TLS blocks into the static
thread allocation:
(1) Set the DTV vector up whenever an offset into the static allocation
is assigned, even if the block itself is not initialized. This has been
seen in libstdc++.
(2) Do not free a DTV block if it is part of the static thread
allocation.

branches: 1.10.8;
fix powerpc TLS problems by removing the hacks for PPC EABI.
the kernel no longer treats R2 specially and its use as
the TLS register is now handled entirely in userland.

branches: 1.9.4;
Only initialise TLS space from the PT_TLS segment, if the size is
positive and the offset has been computed. Fixes PR lib/48324.

Add debug code.

branches: 1.7.4; 1.7.6; 1.7.10; 1.7.12; 1.7.18;
Fix a Freudian slip found by rmind

Add a workaround for older crt0.o that overwrite r2 (tcb pointer).
(save tcb pointer using _lwp_setprivate in ld.elf_so and retrieve the tcb
via _lwp_getprivate in libc and use it to restore the value in r2).

Block signals when using the exclusive lock.

Add basic locking to ld.elf_so.

Add TLS support for PowerPC.
If the port has __lwp_gettcb_fast or __lwp_settcb use them instead of
__lwp_getprivate_fast or lwp_setprivate.

Fix prototype for __tls_get_addr. Add a generic implementation of it
using __tls_get_addr. Update TLS notes.

Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports
_rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to
setup the thread private area of all new threads. ld.elf_so is
responsible for setting up the private area for the initial thread.
Similar functions are called from _libc_init for static binaries, using
dl_iterate_phdr to access the ELF Program Header.

Add test cases to exercise the different TLS storage models. Test cases
are compiled and installed on all platforms, but are skipped on
platforms not marked for TLS support.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

It is inspired by the TLS support in FreeBSD by Doug Rabson and the
clean ups of the DragonFly port of the original FreeBSD modifications.

Alignment. NFCI.

Use alignof and not size_t for platforms with non-natural base
alignments.

PR 54093: Align static TLS area to max_align_t.

branches: 1.12.2;
Do not compile __tls_get_addr() into ldd(1), which fixes ldd(1) crashing
on arm after switching to new jemalloc.

jemalloc invokes __tls_get_addr() under some condition. If anything other
than ld.elf_so nor libc exports it, inconsistency arises as a result.

branches: 1.11.6;
Fix two bugs related to promotion of DSO TLS blocks into the static
thread allocation:
(1) Set the DTV vector up whenever an offset into the static allocation
is assigned, even if the block itself is not initialized. This has been
seen in libstdc++.
(2) Do not free a DTV block if it is part of the static thread
allocation.

branches: 1.10.8;
fix powerpc TLS problems by removing the hacks for PPC EABI.
the kernel no longer treats R2 specially and its use as
the TLS register is now handled entirely in userland.

branches: 1.9.4;
Only initialise TLS space from the PT_TLS segment, if the size is
positive and the offset has been computed. Fixes PR lib/48324.

Add debug code.

branches: 1.7.4; 1.7.6; 1.7.10; 1.7.12; 1.7.18;
Fix a Freudian slip found by rmind

Add a workaround for older crt0.o that overwrite r2 (tcb pointer).
(save tcb pointer using _lwp_setprivate in ld.elf_so and retrieve the tcb
via _lwp_getprivate in libc and use it to restore the value in r2).

Block signals when using the exclusive lock.

Add basic locking to ld.elf_so.

Add TLS support for PowerPC.
If the port has __lwp_gettcb_fast or __lwp_settcb use them instead of
__lwp_getprivate_fast or lwp_setprivate.

Fix prototype for __tls_get_addr. Add a generic implementation of it
using __tls_get_addr. Update TLS notes.

Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports
_rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to
setup the thread private area of all new threads. ld.elf_so is
responsible for setting up the private area for the initial thread.
Similar functions are called from _libc_init for static binaries, using
dl_iterate_phdr to access the ELF Program Header.

Add test cases to exercise the different TLS storage models. Test cases
are compiled and installed on all platforms, but are skipped on
platforms not marked for TLS support.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

It is inspired by the TLS support in FreeBSD by Doug Rabson and the
clean ups of the DragonFly port of the original FreeBSD modifications.

Use alignof and not size_t for platforms with non-natural base
alignments.

PR 54093: Align static TLS area to max_align_t.

Do not compile __tls_get_addr() into ldd(1), which fixes ldd(1) crashing
on arm after switching to new jemalloc.

jemalloc invokes __tls_get_addr() under some condition. If anything other
than ld.elf_so nor libc exports it, inconsistency arises as a result.

branches: 1.11.6;
Fix two bugs related to promotion of DSO TLS blocks into the static
thread allocation:
(1) Set the DTV vector up whenever an offset into the static allocation
is assigned, even if the block itself is not initialized. This has been
seen in libstdc++.
(2) Do not free a DTV block if it is part of the static thread
allocation.

branches: 1.10.8;
fix powerpc TLS problems by removing the hacks for PPC EABI.
the kernel no longer treats R2 specially and its use as
the TLS register is now handled entirely in userland.

branches: 1.9.4;
Only initialise TLS space from the PT_TLS segment, if the size is
positive and the offset has been computed. Fixes PR lib/48324.

Add debug code.

branches: 1.7.4; 1.7.6; 1.7.10; 1.7.12; 1.7.18;
Fix a Freudian slip found by rmind

Add a workaround for older crt0.o that overwrite r2 (tcb pointer).
(save tcb pointer using _lwp_setprivate in ld.elf_so and retrieve the tcb
via _lwp_getprivate in libc and use it to restore the value in r2).

Block signals when using the exclusive lock.

Add basic locking to ld.elf_so.

Add TLS support for PowerPC.
If the port has __lwp_gettcb_fast or __lwp_settcb use them instead of
__lwp_getprivate_fast or lwp_setprivate.

Fix prototype for __tls_get_addr. Add a generic implementation of it
using __tls_get_addr. Update TLS notes.

Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports
_rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to
setup the thread private area of all new threads. ld.elf_so is
responsible for setting up the private area for the initial thread.
Similar functions are called from _libc_init for static binaries, using
dl_iterate_phdr to access the ELF Program Header.

Add test cases to exercise the different TLS storage models. Test cases
are compiled and installed on all platforms, but are skipped on
platforms not marked for TLS support.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

It is inspired by the TLS support in FreeBSD by Doug Rabson and the
clean ups of the DragonFly port of the original FreeBSD modifications.

PR 54093: Align static TLS area to max_align_t.

Do not compile __tls_get_addr() into ldd(1), which fixes ldd(1) crashing
on arm after switching to new jemalloc.

jemalloc invokes __tls_get_addr() under some condition. If anything other
than ld.elf_so nor libc exports it, inconsistency arises as a result.

branches: 1.11.6;
Fix two bugs related to promotion of DSO TLS blocks into the static
thread allocation:
(1) Set the DTV vector up whenever an offset into the static allocation
is assigned, even if the block itself is not initialized. This has been
seen in libstdc++.
(2) Do not free a DTV block if it is part of the static thread
allocation.

branches: 1.10.8;
fix powerpc TLS problems by removing the hacks for PPC EABI.
the kernel no longer treats R2 specially and its use as
the TLS register is now handled entirely in userland.

branches: 1.9.4;
Only initialise TLS space from the PT_TLS segment, if the size is
positive and the offset has been computed. Fixes PR lib/48324.

Add debug code.

branches: 1.7.4; 1.7.6; 1.7.10; 1.7.12; 1.7.18;
Fix a Freudian slip found by rmind

Add a workaround for older crt0.o that overwrite r2 (tcb pointer).
(save tcb pointer using _lwp_setprivate in ld.elf_so and retrieve the tcb
via _lwp_getprivate in libc and use it to restore the value in r2).

Block signals when using the exclusive lock.

Add basic locking to ld.elf_so.

Add TLS support for PowerPC.
If the port has __lwp_gettcb_fast or __lwp_settcb use them instead of
__lwp_getprivate_fast or lwp_setprivate.

Fix prototype for __tls_get_addr. Add a generic implementation of it
using __tls_get_addr. Update TLS notes.

Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports
_rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to
setup the thread private area of all new threads. ld.elf_so is
responsible for setting up the private area for the initial thread.
Similar functions are called from _libc_init for static binaries, using
dl_iterate_phdr to access the ELF Program Header.

Add test cases to exercise the different TLS storage models. Test cases
are compiled and installed on all platforms, but are skipped on
platforms not marked for TLS support.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

It is inspired by the TLS support in FreeBSD by Doug Rabson and the
clean ups of the DragonFly port of the original FreeBSD modifications.

Do not compile __tls_get_addr() into ldd(1), which fixes ldd(1) crashing
on arm after switching to new jemalloc.

jemalloc invokes __tls_get_addr() under some condition. If anything other
than ld.elf_so nor libc exports it, inconsistency arises as a result.

Fix two bugs related to promotion of DSO TLS blocks into the static
thread allocation:
(1) Set the DTV vector up whenever an offset into the static allocation
is assigned, even if the block itself is not initialized. This has been
seen in libstdc++.
(2) Do not free a DTV block if it is part of the static thread
allocation.

branches: 1.10.8;
fix powerpc TLS problems by removing the hacks for PPC EABI.
the kernel no longer treats R2 specially and its use as
the TLS register is now handled entirely in userland.

branches: 1.9.4;
Only initialise TLS space from the PT_TLS segment, if the size is
positive and the offset has been computed. Fixes PR lib/48324.

Add debug code.

branches: 1.7.4; 1.7.6; 1.7.10; 1.7.12; 1.7.18;
Fix a Freudian slip found by rmind

Add a workaround for older crt0.o that overwrite r2 (tcb pointer).
(save tcb pointer using _lwp_setprivate in ld.elf_so and retrieve the tcb
via _lwp_getprivate in libc and use it to restore the value in r2).

Block signals when using the exclusive lock.

Add basic locking to ld.elf_so.

Add TLS support for PowerPC.
If the port has __lwp_gettcb_fast or __lwp_settcb use them instead of
__lwp_getprivate_fast or lwp_setprivate.

Fix prototype for __tls_get_addr. Add a generic implementation of it
using __tls_get_addr. Update TLS notes.

Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports
_rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to
setup the thread private area of all new threads. ld.elf_so is
responsible for setting up the private area for the initial thread.
Similar functions are called from _libc_init for static binaries, using
dl_iterate_phdr to access the ELF Program Header.

Add test cases to exercise the different TLS storage models. Test cases
are compiled and installed on all platforms, but are skipped on
platforms not marked for TLS support.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

It is inspired by the TLS support in FreeBSD by Doug Rabson and the
clean ups of the DragonFly port of the original FreeBSD modifications.

Fix two bugs related to promotion of DSO TLS blocks into the static
thread allocation:
(1) Set the DTV vector up whenever an offset into the static allocation
is assigned, even if the block itself is not initialized. This has been
seen in libstdc++.
(2) Do not free a DTV block if it is part of the static thread
allocation.

fix powerpc TLS problems by removing the hacks for PPC EABI.
the kernel no longer treats R2 specially and its use as
the TLS register is now handled entirely in userland.

branches: 1.9.4;
Only initialise TLS space from the PT_TLS segment, if the size is
positive and the offset has been computed. Fixes PR lib/48324.

Add debug code.

branches: 1.7.4; 1.7.6; 1.7.10; 1.7.12; 1.7.18;
Fix a Freudian slip found by rmind

Add a workaround for older crt0.o that overwrite r2 (tcb pointer).
(save tcb pointer using _lwp_setprivate in ld.elf_so and retrieve the tcb
via _lwp_getprivate in libc and use it to restore the value in r2).

Block signals when using the exclusive lock.

Add basic locking to ld.elf_so.

Add TLS support for PowerPC.
If the port has __lwp_gettcb_fast or __lwp_settcb use them instead of
__lwp_getprivate_fast or lwp_setprivate.

Fix prototype for __tls_get_addr. Add a generic implementation of it
using __tls_get_addr. Update TLS notes.

Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports
_rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to
setup the thread private area of all new threads. ld.elf_so is
responsible for setting up the private area for the initial thread.
Similar functions are called from _libc_init for static binaries, using
dl_iterate_phdr to access the ELF Program Header.

Add test cases to exercise the different TLS storage models. Test cases
are compiled and installed on all platforms, but are skipped on
platforms not marked for TLS support.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

It is inspired by the TLS support in FreeBSD by Doug Rabson and the
clean ups of the DragonFly port of the original FreeBSD modifications.