diff --git a/2020301918-李懋良-试点班第5个报告.docx b/2020301918-李懋良-试点班第5个报告.docx
new file mode 100644
index 0000000..e9c9baf
Binary files /dev/null and b/2020301918-李懋良-试点班第5个报告.docx differ
diff --git a/kern/main.c b/kern/main.c
index 8189df6..1d67a67 100644
--- a/kern/main.c
+++ b/kern/main.c
@@ -41,7 +41,6 @@ init_segment_regs(PROCESS *p_proc)
 static inline void
 lml_map(phyaddr_t cr3, uintptr_t vaddr, phyaddr_t paddr, u32 flags) {
 	uintptr_t *pde_ptr = (uintptr_t *)K_PHY2LIN(cr3);
-	// pde_ptr += PDX(3 * GB); // get page table base addr
 	// get pdx item, pde_ptr + PDX(vaddr)
 	pde_ptr += PDX(vaddr);
 	if (!(*pde_ptr & PTE_P)) {
@@ -100,7 +99,8 @@ void kernel_main(void)
 			if (phdr->p_type == PT_LOAD) {
 				u32 vpage_fst = phdr->p_va & (~0xfff); // clear low 12 bit, start of the first pg
 				u32 vpage_lst = (phdr->p_va + phdr->p_memsz - 1) & (~0xfff); //  start of the last pg
-// in fact, we allocate 4k aligned vpage to every segment; its ok because elf32 segment align is 0x1000
+				// in fact, we allocate 4k aligned vpage to every segment; 
+				// its ok because elf32 segment align is 0x1000
 				u32 page_num = ((vpage_lst - vpage_fst) >> 12) + 1;
 				phyaddr_t newpage = 0; // useless initialization
 				for (int j = 0; j < page_num; ++ j) {
@@ -123,12 +123,8 @@ void kernel_main(void)
 		for (int i = 0; i < 8; ++ i) {
 			lml_map(p_proc->pcb.cr3, (3*GB - (8-i)*PGSIZE), ustack_low + i*PGSIZE, PTE_P | PTE_W | PTE_U);
 		}
-		p_proc->pcb.user_regs.esp = 3*GB;
-		// p_proc->pcb.user_regs.esp -= 4;
-		// uintptr_t* ustack_top = (uintptr_t*)K_PHY2LIN(ustack_high + PGSIZE);
-		// ustack_top --;
-		// *ustack_top = ehdr->e_entry;
-		p_proc->pcb.user_regs.eip = ehdr->e_entry;
+		p_proc->pcb.user_regs.esp = 3*GB; // high to low stack
+		p_proc->pcb.user_regs.eip = ehdr->e_entry; // refer to restart:
 		// 初始化用户寄存器
 		p_proc->pcb.user_regs.eflags = 0x1202; /* IF=1, IOPL=1 */