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, 4 insertions, 45 deletions

diff --git a/118parse-hex-int.subx b/118parse-hex-int.subx
index 5d92b13a..153def3c 100644
--- a/118parse-hex-int.subx
+++ b/118parse-hex-int.subx
@@ -888,51 +888,10 @@ $from-hex-char:letter:
     c3/return
 
 $from-hex-char:abort:
-    # . _write(2/stderr, error)
-    # . . push args
-    68/push  "invalid hex char: "/imm32
-    68/push  2/imm32/stderr
-    # . . call
-    e8/call  _write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . clear-stream($Stderr->buffer)
-    # . . save eax
-    50/push-eax
-    # . . push args
-    68/push  $Stderr->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . . restore eax
-    58/pop-to-eax
-    # . write-int32-hex-buffered(Stderr, eax)
-    # . . push args
-    50/push-eax
-    68/push  Stderr/imm32
-    # . . call
-    e8/call  write-int32-hex-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . flush(Stderr)
-    # . . push args
-    68/push  Stderr/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . _write(2/stderr, "\n")
-    # . . push args
-    68/push  Newline/imm32
-    68/push  2/imm32/stderr
-    # . . call
-    e8/call  _write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . syscall(exit, 1)
-    bb/copy-to-ebx  1/imm32
-    e8/call  syscall_exit/disp32
+    (draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0 "invalid hex char" 3 0)  # 3=cyan
+    {
+      eb/jump loop/disp8
+    }
     # never gets here
 
 # . . vim:nowrap:textwidth=0