7842 - new directory organization

Baremetal is now the default build target and therefore has its sources
at the top-level. Baremetal programs build using the phase-2 Mu toolchain
that requires a Linux kernel. This phase-2 codebase which used to be at
the top-level is now under the linux/ directory. Finally, the phase-2 toolchain,
while self-hosting, has a way to bootstrap from a C implementation, which
is now stored in linux/bootstrap. The bootstrap C implementation uses some
literate programming tools that are now in linux/bootstrap/tools.

So the whole thing has gotten inverted. Each directory should build one
artifact and include the main sources (along with standard library). Tools
used for building it are relegated to sub-directories, even though those
tools are often useful in their own right, and have had lots of interesting
programs written using them.

A couple of things have gotten dropped in this process:
  - I had old ways to run on just a Linux kernel, or with a Soso kernel.
    No more.
  - I had some old tooling for running a single test at the cursor. I haven't
    used that lately. Maybe I'll bring it back one day.

The reorg isn't done yet. Still to do:
  - redo documentation everywhere. All the README files, all other markdown,
    particularly vocabulary.md.
  - clean up how-to-run comments at the start of programs everywhere
  - rethink what to do with the html/ directory. Do we even want to keep
    supporting it?

In spite of these shortcomings, all the scripts at the top-level, linux/
and linux/bootstrap are working. The names of the scripts also feel reasonable.
This is a good milestone to take stock at.

1 files changed, 0 insertions, 36 deletions

diff --git a/apps/ex3.subx b/apps/ex3.subx
deleted file mode 100644
index d75db65a..00000000
--- a/apps/ex3.subx
+++ /dev/null
@@ -1,36 +0,0 @@
-# Add the first 10 numbers, and return the result in the exit code.
-#
-# To run:
-#   $ ./bootstrap translate init.linux apps/ex3.subx -o apps/ex3
-#   $ ./bootstrap run apps/ex3
-# Expected result:
-#   $ echo $?
-#   55
-
-== code
-#   instruction                     effective address                                                   register    displacement    immediate
-# . op          subop               mod             rm32          base        index         scale       r32
-# . 1-3 bytes   3 bits              2 bits          3 bits        3 bits      3 bits        2 bits      2 bits      0/1/2/4 bytes   0/1/2/4 bytes
-
-Entry:
-    # result: ebx = 0
-    bb/copy-to-ebx  0/imm32
-    # counter: ecx = 1
-    b9/copy-to-ecx  1/imm32
-
-$loop:
-    # if (counter > 10) break
-    81          7/subop/compare     3/mod/direct    1/rm32/ecx    .           .             .           .           .               0xa/imm32         # compare ecx
-    7f/jump-if->  $exit/disp8
-    # result += counter
-    01/add                          3/mod/direct    3/rm32/ebx    .           .             .           1/r32/ecx   .               .                 # add ecx to ebx
-    # ++counter
-    41/increment-ecx
-    # loop
-    eb/jump  $loop/disp8
-
-$exit:
-    # exit(ebx)
-    e8/call  syscall_exit/disp32
-
-# . . vim:nowrap:textwidth=0