#include <klibc/string.h>
#include <lunaix/clock.h>
-#include <lunaix/common.h>
#include <lunaix/mm/mmap.h>
-#include <lunaix/mm/pmm.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>
+
+#include <asm/abi.h>
+#include <asm/mm_defs.h>
LOG_MODULE("PROC")
-void*
-__dup_pagetable(pid_t pid, uintptr_t mount_point)
+int
+spawn_process(struct thread** created, ptr_t entry, bool with_ustack)
{
- void* ptd_pp = pmm_alloc_page(pid, PP_FGPERSIST);
- vmm_set_mapping(VMS_SELF, PG_MOUNT_1, ptd_pp, PG_PREM_RW, VMAP_NULL);
+ struct proc_info* kproc = alloc_process();
+ struct proc_mm* mm = vmspace(kproc);
- x86_page_table* ptd = PG_MOUNT_1;
- x86_page_table* pptd = (x86_page_table*)(mount_point | (0x3FF << 12));
+ procvm_initvms_mount(mm);
- size_t kspace_l1inx = L1_INDEX(KERNEL_MM_BASE);
+ struct thread* kthread = create_thread(kproc, with_ustack);
- for (size_t i = 0; i < PG_MAX_ENTRIES - 1; i++) {
+ if (!kthread) {
+ procvm_unmount(mm);
+ delete_process(kproc);
+ return -1;
+ }
- 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;
- }
+ commit_process(kproc);
+ start_thread(kthread, entry);
- // 复制L2页表
- void* pt_pp = pmm_alloc_page(pid, PP_FGPERSIST);
- vmm_set_mapping(VMS_SELF, PG_MOUNT_2, pt_pp, PG_PREM_RW, VMAP_NULL);
+ procvm_unmount(mm);
- x86_page_table* ppt = (x86_page_table*)(mount_point | (i << 12));
- x86_page_table* pt = PG_MOUNT_2;
+ if (created) {
+ *created = kthread;
+ }
- 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;
- }
+ return 0;
+}
- ptd->entry[i] = (uintptr_t)pt_pp | PG_ENTRY_FLAGS(ptde);
+int
+spawn_process_usr(struct thread** created, char* path,
+ const char** argv, const char** envp)
+{
+ // FIXME remote injection of user stack not yet implemented
+
+ struct proc_info* proc = alloc_process();
+ struct proc_mm* mm = vmspace(proc);
+
+ assert(!kernel_process(proc));
+
+ procvm_initvms_mount(mm);
+
+ int errno = 0;
+ struct thread* main_thread;
+ if (!(main_thread = create_thread(proc, true))) {
+ errno = ENOMEM;
+ goto fail;
}
- ptd->entry[PG_MAX_ENTRIES - 1] = NEW_L1_ENTRY(T_SELF_REF_PERM, ptd_pp);
+ struct exec_host container;
+ exec_init_container(&container, main_thread, VMS_MOUNT_1, argv, envp);
+ if ((errno = exec_load_byname(&container, path))) {
+ goto fail;
+ }
- return ptd_pp;
-}
+ commit_process(proc);
+ start_thread(main_thread, container.exe.entry);
-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));
+ if (created) {
+ *created = main_thread;
}
- // 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, VMS_SELF);
+ procvm_unmount(mm);
+ return 0;
+
+fail:
+ procvm_unmount(mm);
+ delete_process(proc);
+ return errno;
}
-__DEFINE_LXSYSCALL(pid_t, fork)
-{
- return dup_proc();
+
+ptr_t proc_vmroot() {
+ return __current->mm->vmroot;
}
__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)
-{
- vmm_mount_pd(VMS_MOUNT_1, pcb->page_table);
+static inline bool
+__can_change_real_id(const struct user_scope* procu, caps_t id_cap) {
+ if (uscope_with_capability(procu, id_cap)) {
+ return true;
+ }
- /*--- 分配用户栈 ---*/
+ if (check_current_acl(0, 0) != ACL_NO_MATCH) {
+ return true;
+ }
+
+ return false;
+}
- struct mm_region* mapped;
- struct mmap_param param = { .vms_mnt = VMS_MOUNT_1,
- .regions = &pcb->mm.regions,
- .length = USTACK_SIZE,
- .proct = PROT_READ | PROT_WRITE,
- .flags = MAP_ANON | MAP_PRIVATE | MAP_FIXED,
- .type = REGION_TYPE_STACK };
+__DEFINE_LXSYSCALL1(int, setuid, uid_t, uid)
+{
+ struct user_scope* procu;
- int status = 0;
- if ((status = mem_map(NULL, &mapped, USTACK_END, NULL, ¶m))) {
- kprint_panic("fail to alloc user stack: %d", status);
+ procu = current_user_scope();
+
+ if (__can_change_real_id(procu, CAP_SETUID))
+ {
+ procu->ruid = uid;
}
- // TODO other uspace initialization stuff
+ __current->suid = uid;
+ __current->euid = uid;
- vmm_unmount_pd(VMS_MOUNT_1);
+ return 0;
}
-void
-__mark_region(uintptr_t start_vpn, uintptr_t end_vpn, int attr)
+__DEFINE_LXSYSCALL1(int, setgid, gid_t, gid)
{
- for (size_t i = start_vpn; i <= end_vpn; i++) {
- x86_pte_t* curproc = &PTE_MOUNTED(VMS_SELF, i);
- x86_pte_t* newproc = &PTE_MOUNTED(VMS_MOUNT_1, i);
- cpu_invplg(newproc);
-
- 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;
- }
+ struct user_scope* procu;
+
+ procu = current_user_scope();
+
+ if (__can_change_real_id(procu, CAP_SETGID))
+ {
+ procu->rgid = gid;
}
+
+ __current->sgid = gid;
+ __current->egid = gid;
+
+ return 0;
}
-void
-__copy_fdtable(struct proc_info* pcb)
+__DEFINE_LXSYSCALL1(int, seteuid, uid_t, euid)
{
- 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]);
- }
+ __current->euid = euid;
+
+ return 0;
}
-pid_t
-dup_proc()
+__DEFINE_LXSYSCALL1(int, setegid, gid_t, egid)
{
- 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);
+ __current->egid = egid;
- if (__current->cwd) {
- pcb->cwd = __current->cwd;
- vfs_ref_dnode(pcb->cwd);
- }
+ return 0;
+}
- __copy_fdtable(pcb);
- region_copy(&__current->mm.regions, &pcb->mm.regions);
+__DEFINE_LXSYSCALL2(int, setgroups, const gid_t*, gids, unsigned int, len)
+{
+ struct user_scope* procu;
- setup_proc_mem(pcb, VMS_SELF);
+ procu = current_user_scope();
- // 根据 mm_region 进一步配置页表
+ if (check_current_acl(0, 0) == ACL_NO_MATCH) {
+ return EPERM;
+ }
- struct mm_region *pos, *n;
- llist_for_each(pos, n, &pcb->mm.regions, head)
- {
- // 如果写共享，则不作处理。
- if ((pos->attr & REGION_WSHARED)) {
- continue;
- }
-
- uintptr_t start_vpn = pos->start >> 12;
- uintptr_t end_vpn = pos->end >> 12;
- __mark_region(start_vpn, end_vpn, pos->attr);
+ if (uscope_with_capability(procu, CAP_SETGID)) {
+ return EPERM;
}
- vmm_unmount_pd(VMS_MOUNT_1);
+ return uscope_setgroups(procu, gids, len);
+}
- // 正如同fork，返回两次。
- pcb->intr_ctx.registers.eax = 0;
- commit_process(pcb);
+__DEFINE_LXSYSCALL(uid_t, getuid)
+{
+ return current_user_scope()->ruid;
+}
- return pcb->pid;
+__DEFINE_LXSYSCALL(gid_t, getgid)
+{
+ return current_user_scope()->rgid;
}
-extern void __kernel_end;
+__DEFINE_LXSYSCALL(uid_t, geteuid)
+{
+ return __current->euid;
+}
-void
-setup_proc_mem(struct proc_info* proc, uintptr_t usedMnt)
+__DEFINE_LXSYSCALL(gid_t, getegid)
{
- // copy the entire kernel page table
- pid_t pid = proc->pid;
- void* pt_copy = __dup_pagetable(pid, usedMnt);
-
- vmm_mount_pd(VMS_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(VMS_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;
- }
+ return __current->egid;
+}
+
+__DEFINE_LXSYSCALL2(int, getgroups, gid_t*, out_buf, unsigned int, len)
+{
+ struct user_scope* procu;
+ struct ugroup_obj* gobj;
+
+ procu = current_user_scope();
+ gobj = user_groups(procu);
- // 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.
+ assert(gobj);
+ len = MIN(gobj->maxcap, len);
- // 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;
-}
\ No newline at end of file
+ unsigned i = 0;
+ for (; i < len && gobj->list[i] != grp_list_end; i++)
+ {
+ out_buf[i] = gobj->list[i];
+ }
+
+ return i + 1;
+}
git://scm.lunaixsky.com / lunaix-os.git / blobdiff