mirror of
https://github.com/CPunch/Laika.git
synced 2024-11-22 04:50:06 +00:00
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
#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 |