kamkow1
e52268cd8e
All checks were successful
Build documentation / build-and-deploy (push) Successful in 26s
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
#include <amd64/gdt.h>
|
|
#include <aux/elf.h>
|
|
#include <libk/std.h>
|
|
#include <libk/string.h>
|
|
#include <limine/requests.h>
|
|
#include <mm/liballoc.h>
|
|
#include <mm/pmm.h>
|
|
#include <proc/proc.h>
|
|
#include <sync/spin_lock.h>
|
|
#include <sys/debug.h>
|
|
|
|
struct proc* proc_from_elf (uint8_t* elf_contents) {
|
|
struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
|
|
|
|
struct proc* proc = malloc (sizeof (*proc));
|
|
if (proc == NULL)
|
|
return NULL;
|
|
|
|
memset (proc, 0, sizeof (*proc));
|
|
|
|
proc->pd.lock = SPIN_LOCK_INIT;
|
|
proc->pd.cr3_paddr = mm_alloc_user_pd_phys ();
|
|
if (proc->pd.cr3_paddr == 0) {
|
|
free (proc);
|
|
return NULL;
|
|
}
|
|
|
|
proc->pdata.kernel_stack = pmm_alloc (KSTACK_SIZE / PAGE_SIZE);
|
|
if (proc->pdata.kernel_stack == PMM_ALLOC_ERR) {
|
|
free (proc);
|
|
return NULL;
|
|
}
|
|
uintptr_t kernel_stack = proc->pdata.kernel_stack;
|
|
proc->pdata.kernel_stack += (uintptr_t)hhdm->offset + KSTACK_SIZE;
|
|
|
|
proc->pdata.user_stack = pmm_alloc (USTACK_SIZE / PAGE_SIZE);
|
|
if (proc->pdata.user_stack == PMM_ALLOC_ERR) {
|
|
free (proc);
|
|
pmm_free (kernel_stack, USTACK_SIZE / PAGE_SIZE);
|
|
return NULL;
|
|
}
|
|
uintptr_t user_stack = proc->pdata.user_stack;
|
|
proc->pdata.user_stack += USTACK_SIZE;
|
|
|
|
proc_map (proc, user_stack, PROC_USTACK_TOP - USTACK_SIZE, USTACK_SIZE / PAGE_SIZE,
|
|
MM_PG_USER | MM_PG_PRESENT | MM_PG_RW);
|
|
|
|
struct elf_aux aux = proc_load_segments (proc, elf_contents);
|
|
|
|
proc->pdata.regs.ss = GDT_UDATA | 0x03;
|
|
proc->pdata.regs.rsp = (uint64_t)PROC_USTACK_TOP;
|
|
proc->pdata.regs.rflags = 0x202;
|
|
proc->pdata.regs.cs = GDT_UCODE | 0x03;
|
|
proc->pdata.regs.rip = aux.entry;
|
|
proc->lock = SPIN_LOCK_INIT;
|
|
atomic_store (&proc->state, PROC_READY);
|
|
|
|
return proc;
|
|
}
|