Use a Thread Information Block in both single and multi-threaded programs.
This stores errno, the cancelation flags, and related bits for each thread
and is allocated by ld.so or libc.a. This is an

Use a Thread Information Block in both single and multi-threaded programs.
This stores errno, the cancelation flags, and related bits for each thread
and is allocated by ld.so or libc.a. This is an ABI break from 5.9-stable!

Make libpthread dlopen'able by moving the cancelation wrappers into libc
and doing locking and fork/errno handling via callbacks that libpthread
registers when it first initializes. 'errno' *must* be declared via
<errno.h> now!

Clean up libpthread's symbol exports like libc.

On powerpc, offset the TIB/TCB/TLS data from the register per the ELF spec.

Testing by various, particularly sthen@ and patrick@
ok kettenis@

show more ...

Provide _dlctl(), an alternate name for dlctl() that's in the reserved
namespace, for use by libpthread

ok deraadt@

Export environ and __progname, making the latter a copy of just the filename
portion like crt0 does. This is prep for eliminating _dl_fixup_user_env()
Mark almost everything in resolve.h as hidden,

Export environ and __progname, making the latter a copy of just the filename
portion like crt0 does. This is prep for eliminating _dl_fixup_user_env()
Mark almost everything in resolve.h as hidden, to improve code generation.

ok kettenis@ mpi@ "good time" deraadt@

show more ...

Apply a symbol export list to ld.so with just the expected dl*() and the
two symbols needed by gdb. Remember: ld.so exports override those in
shared libs.

ok deraadt@