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wip: start to add multiple pd for each task

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0x35c
2025-02-07 15:48:13 +01:00
parent 3b798e5daa
commit 8dd5373e7f
7 changed files with 101 additions and 85 deletions
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53
src/multitasking/task.c
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@ -10,36 +10,49 @@
#include <stdbool.h>
#include <stdint.h>
u32 esp_backup;
uint32_t esp_backup;
struct task *create_task(u8 uid)
struct task *create_task(uint8_t uid)
{
static u32 pid = 1;
static uint32_t pid = 1;
uint32_t *old_pd = current_task->heap;
current_task->heap = page_directory; // kernel pd
struct task *new_task = vmalloc(sizeof(struct task));
current_task->heap = old_pd;
if (!new_task)
return NULL;
new_task->status = RUN;
new_task->uid = uid;
new_task->esp = new_task->esp0 + STACK_SIZE;
new_task->pid = pid++;
// Allocate new pd
old_pd = current_task->heap;
current_task->heap = alloc_pages(4096, (void **)&new_task->cr3);
if (!new_task->heap) {
current_task->heap = old_pd;
vfree(new_task);
return NULL;
}
new_task->heap = current_task->heap;
// Allocate new stack on the newly allocated pd
new_task->esp0 = alloc_pages(STACK_SIZE, NULL);
current_task->heap = old_pd;
if (!new_task->esp0) {
vfree(new_task);
free_pages(new_task->heap, 4096);
return NULL;
}
new_task->heap[768] = ((uint32_t)boot_page_table1 - HEAP_END) | 0x03;
new_task->next = current_task->next;
new_task->prev = current_task;
current_task->next = new_task;
new_task->status = RUN;
new_task->uid = uid;
new_task->esp0 = alloc_pages(STACK_SIZE, NULL);
if (!new_task->esp0) {
vfree(new_task);
return NULL;
}
new_task->esp = new_task->esp0 + STACK_SIZE;
new_task->pid = pid++;
new_task->heap = alloc_pages(4096, (void **)&new_task->cr3);
if (!new_task->heap) {
free_pages(new_task->esp0, STACK_SIZE);
vfree(new_task);
return NULL;
}
return new_task;
}
i8 create_kernel_task(void)
int8_t create_kernel_task(void)
{
struct task *new_task = vmalloc(sizeof(struct task));
if (!new_task)
@ -60,7 +73,7 @@ void exec_fn(void (*fn)(void))
struct task *new_task = create_task(OWNER_KERNEL);
if (!new_task)
kpanic("failed to create new task");
new_task->eip = (u32 *)fn;
new_task->eip = (uint32_t *)fn;
}
void zombify_task(struct task *task)