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/* Copyright (C) 2024 Aryadev Chavali
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License Version 2 for
* details.
* You may distribute and modify this code under the terms of the GNU General
* Public License Version 2, which you should have received a copy of along with
* this program. If not, please go to <https://www.gnu.org/licenses/>.
* Created: 2024-10-25
* Author: Aryadev Chavali
* Description: Entrypoint
*/
#include <malloc.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
typedef int8_t i8;
typedef int16_t i16;
typedef int32_t i32;
typedef int64_t i64;
typedef struct
{
u8 *buffer;
u64 size_memory, size_stack, size_registers;
} vm_t;
#define VM_DEFAULT_MEM_SIZE (1024)
#define VM_DEFAULT_STACK_SIZE (128 * sizeof(u64))
#define VM_DEFAULT_REGISTERS_SIZE (8 * sizeof(u64))
#define VM_STACK(VM) ((VM)->buffer + (VM)->size_memory + (VM)->size_registers)
#define VM_REGISTERS(VM) ((u64 *)((VM)->buffer + (VM)->size_memory))
#define VM_IP(VM) (VM_REGISTERS(VM)[0])
#define VM_SP(VM) (VM_REGISTERS(VM)[1])
void vm_init_malloc(vm_t *vm)
{
if (vm->size_stack == 0)
vm->size_stack = VM_DEFAULT_STACK_SIZE;
if (vm->size_registers == 0)
vm->size_registers = VM_DEFAULT_REGISTERS_SIZE;
if (vm->size_memory == 0)
vm->size_memory = VM_DEFAULT_MEM_SIZE;
vm->buffer = calloc(1, vm->size_memory + vm->size_stack + vm->size_registers);
}
void vm_stop(vm_t *vm)
{
free(vm->buffer);
memset(vm, 0, sizeof(*vm));
}
int main(void)
{
vm_t vm = {0};
vm_init_malloc(&vm);
vm_stop(&vm);
return 0;
}
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