3 files changed, 69 insertions, 0 deletions
diff --git a/mu-init-test.subx b/mu-init-test.subx
new file mode 100644
index 00000000..6b08b113
--- /dev/null
+++ b/mu-init-test.subx
@@ -0,0 +1,37 @@
+# Just a test stub for mu-init.subx
+#
+# Try it out like this:
+#   $ ./ntranslate init.linux 0*.subx mu-init.subx mu-init-test.subx
+#   $ ./a.elf  # should run all tests
+
+main:  # args : (address array kernel-string) -> result/ebx : int
+    # . prologue
+    55/push-ebp
+    89/<- %ebp 4/r32/esp
+    # . save registers
+    50/push-eax
+    56/push-esi
+    # esi = args
+    8b/-> *(ebp+8) 6/r32/esi
+    {
+      # if (argc <= 1) break
+      81 7/subop/compare *esi 1/imm32
+      7e/jump-if-lesser-or-equal break/disp8
+      # if (argv[1] != "test") break
+      (kernel-string-equal? *(esi+8) "test")  # => eax
+      3d/compare-eax-and 0/imm32
+      74/jump-if-equal break/disp8
+      #
+      (run-tests)
+      # return *Num-test-failures
+      8b/-> *Num-test-failures 3/r32/ebx
+      eb/jump $main:end/disp8
+    }
+$main:end:
+    # . restore registers
+    5e/pop-to-esi
+    58/pop-to-eax
+    # . epilogue
+    89/<- %esp 5/r32/ebp
+    5d/pop-to-ebp
+    c3/return
diff --git a/mu-init.subx b/mu-init.subx
new file mode 100644
index 00000000..0c5d0293
--- /dev/null
+++ b/mu-init.subx
@@ -0,0 +1,25 @@
+# Initialize the minimal runtime for Mu programs.
+#
+# See translate_mu for how this file is used.
+#
+# Mu programs start at a function called 'main' with this signature:
+#   fn main args: (address array kernel-string) -> exit_status/ebx : int
+# If your program doesn't need commandline arguments you can drop it:
+#   fn main -> exit_status/ebx : int
+#
+# Notice that the output must be in ebx, so that the exit() syscall can pick
+# it up.
+
+== code
+
+Entry:
+    # we don't use ebp in Entry; just initialize it
+    bd/copy-to-ebp 0/imm32
+    # var args/eax : (address array kernel-string)
+    89/<- %eax 4/r32/esp
+    # initialize the heap
+    (new-segment *Heap-size Heap)
+    # run Mu program
+    (main %eax)
+    # exit
+    (syscall_exit)
diff --git a/translate_mu b/translate_mu
new file mode 100755
index 00000000..d3029433
--- /dev/null
+++ b/translate_mu
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -e
+
+cat $*          |apps/mu      > a.subx
+
+./ntranslate init.linux 0*.subx mu-init.subx a.subx