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, 157 deletions

diff --git a/baremetal/310copy-bytes.subx b/baremetal/310copy-bytes.subx
deleted file mode 100644
index 2586a53f..00000000
--- a/baremetal/310copy-bytes.subx
+++ /dev/null
@@ -1,157 +0,0 @@
-# Some helpers for copying non-overlapping regions of memory.
-# Really only intended to be called from code generated by mu.subx.
-
-== code
-
-copy-bytes:  # src: (addr byte), dest: (addr byte), size: int
-    # pseudocode:
-    #   curr-src/esi = src
-    #   curr-dest/edi = dest
-    #   i/ecx = 0
-    #   while true
-    #     if (i >= size) break
-    #     *curr-dest = *curr-src
-    #     ++curr-src
-    #     ++curr-dest
-    #     ++i
-    #
-    # . prologue
-    55/push-ebp
-    89/<- %ebp 4/r32/esp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    56/push-esi
-    57/push-edi
-    # curr-src/esi = src
-    8b/-> *(ebp+8) 6/r32/esi
-    # curr-dest/edi = dest
-    8b/-> *(ebp+0xc) 7/r32/edi
-    # var i/ecx: int = 0
-    b9/copy-to-ecx 0/imm32
-    # edx = size
-    8b/-> *(ebp+0x10) 2/r32/edx
-    {
-      # if (i >= size) break
-      39/compare %ecx 2/r32/edx
-      7d/jump-if->=  break/disp8
-      # *curr-dest = *curr-src
-      8a/byte-> *esi 0/r32/AL
-      88/byte<- *edi 0/r32/AL
-      # update
-      46/increment-esi
-      47/increment-edi
-      41/increment-ecx
-      eb/jump loop/disp8
-    }
-$copy-bytes:end:
-    # . restore registers
-    5f/pop-to-edi
-    5e/pop-to-esi
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/<- %esp 5/r32/ebp
-    5d/pop-to-ebp
-    c3/return
-
-stream-to-array:  # in: (addr stream _), out: (addr handle array _)
-    # . prologue
-    55/push-ebp
-    89/<- %ebp 4/r32/esp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    56/push-esi
-    # esi = s
-    8b/-> *(ebp+8) 6/r32/esi
-    # var len/ecx: int = s->write - s->read
-    8b/-> *esi 1/r32/ecx
-    2b/subtract *(esi+4) 1/r32/ecx
-    # allocate
-    (allocate-array Heap %ecx *(ebp+0xc))
-    # var in/edx: (addr byte) = s->data + s->read
-    8b/-> *(esi+4) 2/r32/edx
-    8d/copy-address *(esi+edx+0xc) 2/r32/edx
-    # var dest/eax: (addr byte) = data for out
-    8b/-> *(ebp+0xc) 0/r32/eax
-    (lookup *eax *(eax+4))  # => eax
-    8d/copy-address *(eax+4) 0/r32/eax
-    #
-    (copy-bytes %edx %eax %ecx)
-$stream-to-array:end:
-    # . restore registers
-    5e/pop-to-esi
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/<- %esp 5/r32/ebp
-    5d/pop-to-ebp
-    c3/return
-
-test-stream-to-array:
-    # . prologue
-    55/push-ebp
-    89/<- %ebp 4/r32/esp
-    # setup
-    (clear-stream _test-input-stream)
-    (write _test-input-stream "abc")
-    # skip something
-    (read-byte _test-input-stream)  # => eax
-    # var out/ecx: (handle array byte)
-    68/push 0/imm32
-    68/push 0/imm32
-    89/<- %ecx 4/r32/esp
-    #
-    (stream-to-array _test-input-stream %ecx)
-    (lookup *ecx *(ecx+4))  # => eax
-    (check-strings-equal %eax "bc")
-    # . epilogue
-    89/<- %esp 5/r32/ebp
-    5d/pop-to-ebp
-    c3/return
-
-# like stream-to-array but ignore surrounding quotes
-# we might do other stuff here later
-unquote-stream-to-array:  # in: (addr stream _), out: (addr handle array _)
-    # . prologue
-    55/push-ebp
-    89/<- %ebp 4/r32/esp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    56/push-esi
-    # esi = s
-    8b/-> *(ebp+8) 6/r32/esi
-    # var len/ecx: int = s->write - s->read - 2
-    8b/-> *esi 1/r32/ecx
-    2b/subtract *(esi+4) 1/r32/ecx
-    81 7/subop/compare %ecx 2/imm32
-    7c/jump-if-< $unquote-stream-to-array:end/disp8
-    81 5/subop/subtract %ecx 2/imm32
-    # allocate
-    (allocate-array Heap %ecx *(ebp+0xc))
-    # var in/edx: (addr byte) = s->data + s->read + 1
-    8b/-> *(esi+4) 2/r32/edx
-    8d/copy-address *(esi+edx+0xd) 2/r32/edx  # Stream-data + 1
-    # var dest/eax: (addr byte) = data for out
-    8b/-> *(ebp+0xc) 0/r32/eax
-    (lookup *eax *(eax+4))  # => eax
-    8d/copy-address *(eax+4) 0/r32/eax
-    #
-    (copy-bytes %edx %eax %ecx)
-$unquote-stream-to-array:end:
-    # . restore registers
-    5e/pop-to-esi
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/<- %esp 5/r32/ebp
-    5d/pop-to-ebp
-    c3/return