real filesystems (and /proc, our immediate target) look up files incrementally
by each component.  Apply that to our filesystem infrastructure.

A new object is introduced, dir, representing a directory.  Lookup operations
are deferred to this object.

avoid leakage

This takes the short cut of using sse 4.1 for the implementation,
avoiding a coplicated C implementation.  Will work on Core and higher
processors.

override with 'make V=1'

needed to set up the initial TLS block

It is not an exception condition.

This allows generic code to include arch specific code, by eliding the
arch/x64/ prefix.

We will never build a single program containing code from two architectures,
so segregating arch-specific code into a separate namespace is not solving
any problem.  However it makes using arch-specific code from generic code
impossible.

Remove the 86 namespace to fix this.

The compiler complains that the varibles are not initialized, even though the
inout guarantees that they will be.  Initialize them anyway.

'make mode=release'

-MD accepts no argument, and luckily the argument we supplied evaluated to
nothing.  Remove it.

the -MP switch allows make to ignore deleted files.

this gives us better dependency tracking.

Code worked by accident.

Adjust the debug prints to the Debug class

* 'master' of github.com:/avikivity/osv:
  Add missing file elf-dl.s
  build: fix autodependencies for .S files
  elf: fix missing pltgot relocation
  linux: implement gettid() syscall (stub)
  add stub for dispatching linux syscalls via syscall()