1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
typedef struct Process process_t;
#ifndef SCHEDULER_H
#define SCHEDULER_H
#include <fs/ext2.h>
#include <fs/vfs.h>
#include <lib/list.h>
#include <lib/relist.h>
#include <lib/stack.h>
#include <mmu.h>
#include <signal.h>
#include <stdbool.h>
#define MAX_PATH 256
#define KEYBOARD_HALT 0
#define WAIT_CHILD_HALT 1
extern process_t *current_task;
extern process_t *ready_queue;
int fork(void);
int exec(const char *filename, char **argv, int dealloc_argv,
int dealloc_filename);
void switch_task(void);
void tasking_init(void);
void exit(int status);
int process_signal(vfs_fd_t *fd, int sig);
void *mmap(void *addr, size_t length, int prot, int flags, int fd,
size_t offset);
int munmap(void *addr, size_t length);
int msync(void *addr, size_t length, int flags);
int kill(pid_t pid, int sig);
void set_signal_handler(int sig, void (*handler)(int));
typedef struct {
void *u_address;
void *k_address;
u32 length;
int fd;
struct vfs_vm_object *underlying_object;
} MemoryMap;
typedef struct {
uintptr_t handler_ip;
} signal_t;
typedef struct TCB {
uint32_t ESP;
uint32_t CR3;
uint32_t ESP0;
} __attribute__((packed)) TCB;
void process_push_restore_context(process_t *p, reg_t r);
void process_pop_restore_context(process_t *p, reg_t *out_r);
void process_push_signal(process_t *p, signal_t s);
const signal_t *process_pop_signal(process_t *p);
struct Process {
pid_t pid;
char program_name[100];
char current_working_directory[MAX_PATH];
void *signal_handlers[32];
void *interrupt_handler;
PageDirectory *cr3;
struct relist file_descriptors;
struct list read_list;
struct list write_list;
struct list disconnect_list;
int reference_count;
struct list event_queue;
struct stack restore_context_stack;
struct stack signal_stack;
u32 halts[2];
struct Halt *halt_list;
void *data_segment_end;
process_t *next;
process_t *parent;
TCB *tcb;
int is_interrupted;
int is_halted;
// TODO: Create a linkedlist of childs so that the parent process
// can do stuff such as reap zombies and get status.
process_t *child;
MemoryMap *maps[100];
u32 sleep_until;
int child_rc;
int dead;
};
int get_task_from_pid(pid_t pid, process_t **out);
void free_process(process_t *p);
void *get_free_virtual_memory(size_t length);
void signal_process(process_t *p, int sig);
void process_remove_reference(process_t *p);
#endif
|
