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

3 files changed, 113 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]);
\ No newline at end of file
diff --git a/pu2/code/lib.i2 b/pu2/code/lib.i2
new file mode 100644
index 0000000..e619fd8
--- /dev/null
+++ b/pu2/code/lib.i2
@@ -0,0 +1,37 @@
+// standard library for i2
+
+macro puts(2) {
+    @1 =   0; // write
+    @2 = /1/; // ptr
+    @3 = /2/; // size
+    system(); // interrupt
+}
+
+macro putchar(1) {
+    @1  =   0; // write
+    @2  =  10; // ptr
+    @3  =   1; // size
+    @10 = /1/; // value
+    system();  // interrupt
+}
+
+// &str, out_dest
+macro strlen(2) {
+    @20 = /1/; // get reference to var
+    @21 =   0; // char count
+    @22 = *@20;
+    while(@22) {
+        @20++;
+        @22 = *@20;
+        @21++;
+    }
+
+    /2/ = @21;
+}
+
+macro print(1) {
+    strlen([/1/], [@3]);
+    @1 =   0; // write
+    @2 = /1/; // ptr
+    system(); // interrupt
+}
\ No newline at end of file
diff --git a/pu2/code/main.i2 b/pu2/code/main.i2
new file mode 100644
index 0000000..8cc5615
--- /dev/null
+++ b/pu2/code/main.i2
@@ -0,0 +1,30 @@
+
+/*
+
+    testing grounds for the ir2 assembler
+    i still don't know whether it's a compiler, an IR emitter, or an assembler
+    hmmm...
+
+*/
+
+import lib.i2;
+
+let initial = 5;
+let count = initial;
+
+while (count) {
+    count--;
+
+    print(["hello "]);
+    
+    // basically equivalent to putchar(initial - count + '0' - 1)
+    let index = initial;
+    index -= count;
+    index += 47; // '0' - 1
+    putchar([index]);
+
+    putchar([10]);
+}
+
+exit(0);
+