cool stuff, right? multi-process support with permission levels

1 files changed, 46 insertions, 0 deletions

diff --git a/pu2/code/kernel.i2 b/pu2/code/kernel.i2
new file mode 100644
index 0000000..2da075c
--- /dev/null
+++ b/pu2/code/kernel.i2
@@ -0,0 +1,46 @@
+import lib.i2;
+
+// test - write memory, spawn process, read memory
+
+macro spawn_sudo(3) {
+    @1  =   3; // authorized feature
+    @2  =   0; // spawn process
+
+    @10 =   1; // target ring = 1
+    @11 = /1/; // memory  start
+    @12 = /2/; // memory length
+    @13 =   1; // can spawn procs
+    @14 =   1; // can make syscalls
+    @15 = /3/; // time slice limit
+
+    system();  // interrupt
+}
+
+macro read_pmem(4) {
+    @1  =   3; // authorized feature
+    @2  =   2; // read memory
+    @10 = /1/; // target pid
+    @11 = /2/; // address
+    @12 = /3/; // length
+    @13 = /4/; // target
+
+    system();  // interrupt
+}
+
+/* write the actual program */
+@1007 = 10;
+@1010 =  1; @1011 = 3; // a    = 3;
+@1012 = 17; @1013 = 9; // m[3] = 9;
+@1014 =  0; @1015 = 0; // halt
+spawn_sudo([1000], [16], [5]);
+
+let output    = @2;
+let pid       = @3;
+let exit_code = @4;
+let finished  = @5;
+
+let read_out = 0;
+read_pmem([pid], [3], [1], [&read_out]);
+
+read_out += '0';
+putchar([read_out]);
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