#include <klibc/string.h>
#include <lunaix/clock.h>
-#include <lunaix/common.h>
-#include <lunaix/mm/pmm.h>
+#include <lunaix/mm/mmap.h>
+#include <lunaix/mm/vmm.h>
#include <lunaix/mm/region.h>
#include <lunaix/mm/valloc.h>
-#include <lunaix/mm/vmm.h>
#include <lunaix/process.h>
#include <lunaix/spike.h>
#include <lunaix/status.h>
#include <lunaix/syscall.h>
#include <lunaix/syslog.h>
+#include <lunaix/exec.h>
+#include <lunaix/fs.h>
-LOG_MODULE("PROC")
-
-void*
-__dup_pagetable(pid_t pid, uintptr_t mount_point)
-{
- void* ptd_pp = pmm_alloc_page(pid, PP_FGPERSIST);
- vmm_set_mapping(PD_REFERENCED, PG_MOUNT_1, ptd_pp, PG_PREM_RW, VMAP_NULL);
-
- x86_page_table* ptd = PG_MOUNT_1;
- x86_page_table* pptd = (x86_page_table*)(mount_point | (0x3FF << 12));
-
- size_t kspace_l1inx = L1_INDEX(KERNEL_MM_BASE);
-
- for (size_t i = 0; i < PG_MAX_ENTRIES - 1; i++) {
-
- x86_pte_t ptde = pptd->entry[i];
- // 空或者是未在内存中的L1页表项直接照搬过去。
- // 内核地址空间直接共享过去。
- if (!ptde || i >= kspace_l1inx || !(ptde & PG_PRESENT)) {
- ptd->entry[i] = ptde;
- continue;
- }
-
- // 复制L2页表
- void* pt_pp = pmm_alloc_page(pid, PP_FGPERSIST);
- vmm_set_mapping(
- PD_REFERENCED, PG_MOUNT_2, pt_pp, PG_PREM_RW, VMAP_NULL);
-
- x86_page_table* ppt = (x86_page_table*)(mount_point | (i << 12));
- x86_page_table* pt = PG_MOUNT_2;
-
- for (size_t j = 0; j < PG_MAX_ENTRIES; j++) {
- x86_pte_t pte = ppt->entry[j];
- pmm_ref_page(pid, PG_ENTRY_ADDR(pte));
- pt->entry[j] = pte;
- }
-
- ptd->entry[i] = (uintptr_t)pt_pp | PG_ENTRY_FLAGS(ptde);
- }
-
- ptd->entry[PG_MAX_ENTRIES - 1] = NEW_L1_ENTRY(T_SELF_REF_PERM, ptd_pp);
-
- return ptd_pp;
-}
-
-void
-__del_pagetable(pid_t pid, uintptr_t mount_point)
-{
- x86_page_table* pptd = (x86_page_table*)(mount_point | (0x3FF << 12));
-
- // only remove user address space
- for (size_t i = 0; i < L1_INDEX(KERNEL_MM_BASE); i++) {
- x86_pte_t ptde = pptd->entry[i];
- if (!ptde || !(ptde & PG_PRESENT)) {
- continue;
- }
-
- x86_page_table* ppt = (x86_page_table*)(mount_point | (i << 12));
-
- for (size_t j = 0; j < PG_MAX_ENTRIES; j++) {
- x86_pte_t pte = ppt->entry[j];
- // free the 4KB data page
- if ((pte & PG_PRESENT)) {
- pmm_free_page(pid, PG_ENTRY_ADDR(pte));
- }
- }
- // free the L2 page table
- pmm_free_page(pid, PG_ENTRY_ADDR(ptde));
- }
- // free the L1 directory
- pmm_free_page(pid, PG_ENTRY_ADDR(pptd->entry[PG_MAX_ENTRIES - 1]));
-}
-
-void*
-vmm_dup_vmspace(pid_t pid)
-{
- return __dup_pagetable(pid, PD_REFERENCED);
-}
+#include <sys/abi.h>
+#include <sys/mm/mm_defs.h>
-__DEFINE_LXSYSCALL(pid_t, fork)
-{
- return dup_proc();
-}
+LOG_MODULE("PROC")
__DEFINE_LXSYSCALL(pid_t, getpid)
{
struct proc_info* proc = pid ? get_process(pid) : __current;
if (!proc) {
- __current->k_status = EINVAL;
+ syscall_result(EINVAL);
return -1;
}
struct proc_info* gruppenfuhrer = get_process(pgid);
if (!gruppenfuhrer || proc->pgid == gruppenfuhrer->pid) {
- __current->k_status = EINVAL;
+ syscall_result(EINVAL);
return -1;
}
return 0;
}
-void
-init_proc_user_space(struct proc_info* pcb)
+int
+spawn_process(struct thread** created, ptr_t entry, bool with_ustack)
{
- vmm_mount_pd(PD_MOUNT_1, pcb->page_table);
+ struct proc_info* kproc = alloc_process();
+ struct proc_mm* mm = vmspace(kproc);
- /*--- 分配用户栈 ---*/
+ procvm_initvms_mount(mm);
- // 注册用户栈区域
- region_add(
- &pcb->mm.regions, USTACK_END, USTACK_TOP, REGION_RW | REGION_RSHARED);
+ struct thread* kthread = create_thread(kproc, with_ustack);
- // 预留地址空间，具体物理页将由Page Fault Handler按需分配。
- for (uintptr_t i = PG_ALIGN(USTACK_END); i < USTACK_TOP; i += PG_SIZE) {
- vmm_set_mapping(PD_MOUNT_1, i, 0, PG_ALLOW_USER | PG_WRITE, VMAP_NULL);
+ if (!kthread) {
+ procvm_unmount(mm);
+ delete_process(kproc);
+ return -1;
}
- // TODO other uspace initialization stuff
+ commit_process(kproc);
+ start_thread(kthread, entry);
- vmm_unmount_pd(PD_MOUNT_1);
-}
-
-void
-__mark_region(uintptr_t start_vpn, uintptr_t end_vpn, int attr)
-{
- for (size_t i = start_vpn; i <= end_vpn; i++) {
- x86_pte_t* curproc = &PTE_MOUNTED(PD_REFERENCED, i);
- x86_pte_t* newproc = &PTE_MOUNTED(PD_MOUNT_1, i);
- cpu_invplg(newproc);
+ procvm_unmount(mm);
- if ((attr & REGION_MODE_MASK) == REGION_RSHARED) {
- // 如果读共享，则将两者的都标注为只读，那么任何写入都将会应用COW策略。
- cpu_invplg(curproc);
- cpu_invplg(i << 12);
- *curproc = *curproc & ~PG_WRITE;
- *newproc = *newproc & ~PG_WRITE;
- } else {
- // 如果是私有页，则将该页从新进程中移除。
- *newproc = 0;
- }
+ if (created) {
+ *created = kthread;
}
-}
-void
-__copy_fdtable(struct proc_info* pcb)
-{
- for (size_t i = 0; i < VFS_MAX_FD; i++) {
- struct v_fd* fd = __current->fdtable->fds[i];
- if (!fd)
- continue;
- vfs_dup_fd(fd, &pcb->fdtable->fds[i]);
- }
+ return 0;
}
-pid_t
-dup_proc()
+int
+spawn_process_usr(struct thread** created, char* path,
+ const char** argv, const char** envp)
{
- struct proc_info* pcb = alloc_process();
- pcb->mm.u_heap = __current->mm.u_heap;
- pcb->intr_ctx = __current->intr_ctx;
- pcb->parent = __current;
-
- memcpy(pcb->fxstate, __current->fxstate, 512);
-
- if (__current->cwd) {
- pcb->cwd = __current->cwd;
- vfs_ref_dnode(pcb->cwd);
- }
+ // FIXME remote injection of user stack not yet implemented
- __copy_fdtable(pcb);
- region_copy(&__current->mm.regions, &pcb->mm.regions);
+ struct proc_info* proc = alloc_process();
+ struct proc_mm* mm = vmspace(proc);
+
+ assert(!kernel_process(proc));
- setup_proc_mem(pcb, PD_REFERENCED);
+ procvm_initvms_mount(mm);
- // 根据 mm_region 进一步配置页表
-
- struct mm_region *pos, *n;
- llist_for_each(pos, n, &pcb->mm.regions.head, head)
- {
- // 如果写共享，则不作处理。
- if ((pos->attr & REGION_WSHARED)) {
- continue;
- }
+ int errno = 0;
+ struct thread* main_thread;
+ if (!(main_thread = create_thread(proc, true))) {
+ errno = ENOMEM;
+ goto fail;
+ }
- uintptr_t start_vpn = pos->start >> 12;
- uintptr_t end_vpn = pos->end >> 12;
- __mark_region(start_vpn, end_vpn, pos->attr);
+ struct exec_host container;
+ exec_init_container(&container, main_thread, VMS_MOUNT_1, argv, envp);
+ if ((errno = exec_load_byname(&container, path))) {
+ goto fail;
}
- vmm_unmount_pd(PD_MOUNT_1);
+ commit_process(proc);
+ start_thread(main_thread, container.exe.entry);
- // 正如同fork，返回两次。
- pcb->intr_ctx.registers.eax = 0;
+ if (created) {
+ *created = main_thread;
+ }
- commit_process(pcb);
+ procvm_unmount(mm);
+ return 0;
- return pcb->pid;
+fail:
+ procvm_unmount(mm);
+ delete_process(proc);
+ return errno;
}
-extern void __kernel_end;
-
-void
-setup_proc_mem(struct proc_info* proc, uintptr_t usedMnt)
-{
- // copy the entire kernel page table
- pid_t pid = proc->pid;
- void* pt_copy = __dup_pagetable(pid, usedMnt);
-
- vmm_mount_pd(PD_MOUNT_1, pt_copy); // 将新进程的页表挂载到挂载点#2
-
- // copy the kernel stack
- for (size_t i = KSTACK_START >> 12; i <= KSTACK_TOP >> 12; i++) {
- volatile x86_pte_t* ppte = &PTE_MOUNTED(PD_MOUNT_1, i);
-
- /*
- This is a fucking nightmare, the TLB caching keep the rewrite to PTE
- from updating. Even the Nightmare Moon the Evil is far less nasty
- than this. It took me hours of debugging to figure this out.
-
- In the name of Celestia our glorious goddess, I will fucking HATE
- the TLB for the rest of my LIFE!
- */
- cpu_invplg(ppte);
-
- x86_pte_t p = *ppte;
- void* ppa = vmm_dup_page(pid, PG_ENTRY_ADDR(p));
- pmm_free_page(pid, PG_ENTRY_ADDR(p));
- *ppte = (p & 0xfff) | (uintptr_t)ppa;
- }
-
- // 我们不需要分配内核的区域，因为所有的内核代码和数据段只能通过系统调用来访问，任何非法的访问
- // 都会导致eip落在区域外面，从而segmentation fault.
- // 至于其他的区域我们暂时没有办法知道，因为那需要知道用户程序的信息。我们留到之后在处理。
- proc->page_table = pt_copy;
+ptr_t proc_vmroot() {
+ return __current->mm->vmroot;
}
\ No newline at end of file
git://scm.lunaixsky.com / lunaix-os.git / blobdiff