task.h

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#pragma once
 
#include "memory/paging/paging.h"
#include "idt/idt.h"
struct registers
{
    uint32_t edi; //0
    uint32_t esi; //4
    uint32_t ebp; //8
    uint32_t ebx; //12
    uint32_t edx; //16
    uint32_t ecx; //20
    uint32_t eax; //24
 
    uint32_t ip; //28
    uint32_t cs; //32
    uint32_t flags; //36
    uint32_t esp; //40
    uint32_t ss; //44
} __attribute__((packed));
 
struct process;
 
struct task 
{
    struct paging_chunk* page_directory;
 
    struct registers registers;
 
    struct process* process;
 
    struct task* next;
 
    struct task* prev;
};
 
#define PROGRAM_VIRTUAL_ADDRESS 0x400000
#define PROGRAM_VIRTUAL_STACK_SIZE 1024 * 16
#define PROGRAM_VIRTUAL_STACK_ADDRESS_START 0x3FF000
#define PROGRAM_VIRTUAL_STACK_ADDRESS_END  PROGRAM_VIRTUAL_STACK_ADDRESS_START - PROGRAM_VIRTUAL_STACK_SIZE
 
struct task* task_current();
struct task* task_get_next();
struct task* task_new(struct process* process);
int task_free(struct task* task);
void task_return(struct registers* registers);
 
void task_run_first_ever_task();
void user_registers();
int task_switch(struct task* task);
int task_page();
void task_page_task(struct task* task);
void task_current_save_state(struct interrupt_frame* frame);
 
int task_copy_string_from(struct task* task, void* virtual_address, void* physical_address, int max);
void* task_peek_stack(struct task* task, int offset);