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https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-11 09:06:47 +00:00
🆕 fork
This commit is contained in:
fslongjin
parent
2ed8bdcfd2
commit
1801ddffbd
@ -281,7 +281,7 @@ static bool ahci_read(HBA_PORT *port, uint32_t startl, uint32_t starth, uint32_t
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port->ci = 1 << slot; // Issue command
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current_pcb->flags |= PROC_NEED_SCHED;
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current_pcb->flags |= PF_NEED_SCHED;
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sched_cfs();
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int retval = AHCI_SUCCESS;
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// Wait for completion
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@ -361,7 +361,7 @@ static bool ahci_write(HBA_PORT *port, uint32_t startl, uint32_t starth, uint32_
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// printk("[slot]{%d}", slot);
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port->ci = 1; // Issue command
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current_pcb->flags |= PROC_NEED_SCHED;
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current_pcb->flags |= PF_NEED_SCHED;
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//sched_cfs();
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int retval = AHCI_SUCCESS;
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@ -465,7 +465,7 @@ static struct ahci_request_packet_t *ahci_make_request(long cmd, uint64_t base_a
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void ahci_end_request()
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{
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ahci_req_queue.in_service->wait_queue.pcb->state = PROC_RUNNING;
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ahci_req_queue.in_service->wait_queue.pcb->flags |= PROC_NEED_SCHED;
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ahci_req_queue.in_service->wait_queue.pcb->flags |= PF_NEED_SCHED;
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kfree((uint64_t *)ahci_req_queue.in_service);
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ahci_req_queue.in_service = NULL;
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@ -509,7 +509,7 @@ void do_IRQ(struct pt_regs *rsp, ul number)
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kBUG("current_pcb->preempt_count<0! pid=%d", current_pcb->pid); // should not be here
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// 检测当前进程是否可被调度
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if (current_pcb->flags & PROC_NEED_SCHED)
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if (current_pcb->flags & PF_NEED_SCHED)
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{
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// kdebug("to sched");
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sched_cfs();
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@ -9,10 +9,21 @@
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#include <sched/sched.h>
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#include <filesystem/fat32/fat32.h>
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#include <common/stdio.h>
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#include <process/spinlock.h>
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spinlock_t process_global_pid_write_lock; // 增加pid的写锁
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long process_global_pid = 0; // 系统中最大的pid
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extern void system_call(void);
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extern void kernel_thread_func(void);
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/**
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* @brief 将进程加入到调度器的就绪队列中
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*
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* @param pcb 进程的pcb
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*/
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static inline void process_wakeup(struct process_control_block *pcb);
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ul _stack_start; // initial proc的栈基地址（虚拟地址）
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struct mm_struct initial_mm = {0};
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struct thread_struct initial_thread =
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@ -386,7 +397,7 @@ int kernel_thread(unsigned long (*fn)(unsigned long), unsigned long arg, unsigne
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// kdebug("kernel_thread_func=%#018lx", kernel_thread_func);
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// kdebug("&kernel_thread_func=%#018lx", &kernel_thread_func);
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// kdebug("1111\tregs.rip = %#018lx", regs.rip);
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return do_fork(®s, flags, 0, 0);
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return do_fork(®s, flags | CLONE_VM, 0, 0);
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}
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/**
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@ -406,26 +417,47 @@ void process_init()
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initial_mm.rodata_addr_start = (ul)&_rodata;
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initial_mm.rodata_addr_end = (ul)&_erodata;
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initial_mm.bss_start = (uint64_t)&_bss;
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initial_mm.bss_end = (uint64_t)&_ebss;
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initial_mm.brk_start = 0;
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initial_mm.brk_end = memory_management_struct.kernel_end;
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initial_mm.stack_start = _stack_start;
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// 初始化进程和tss
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// set_tss64((uint *)phys_2_virt(TSS64_Table), initial_thread.rbp, initial_tss[0].rsp1, initial_tss[0].rsp2, initial_tss[0].ist1, initial_tss[0].ist2, initial_tss[0].ist3, initial_tss[0].ist4, initial_tss[0].ist5, initial_tss[0].ist6, initial_tss[0].ist7);
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initial_tss[proc_current_cpu_id].rsp0 = initial_thread.rbp;
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// ========= 在IDLE进程的顶层页表中添加对内核地址空间的映射 =====================
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// 由于IDLE进程的顶层页表的高地址部分会被后续进程所复制，为了使所有进程能够共享相同的内核空间，
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// 因此需要先在IDLE进程的顶层页表内映射二级页表
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uint64_t *idle_pml4t_vaddr = (uint64_t *)phys_2_virt((uint64_t)get_CR3() & (~0xfffUL));
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for (int i = 256; i < 512; ++i)
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{
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uint64_t *tmp = idle_pml4t_vaddr + i;
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if(*tmp==0)
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{
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void* pdpt = kmalloc(PAGE_4K_SIZE,0);
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memset(pdpt, 0, PAGE_4K_SIZE);
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set_pml4t(tmp, mk_pml4t(virt_2_phys(pdpt), PAGE_KERNEL_PGT));
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}
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}
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/*
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kdebug("initial_thread.rbp=%#018lx", initial_thread.rbp);
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kdebug("initial_tss[0].rsp1=%#018lx", initial_tss[0].rsp1);
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kdebug("initial_tss[0].ist1=%#018lx", initial_tss[0].ist1);
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*/
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// 初始化pid的写锁
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spin_init(&process_global_pid_write_lock);
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// 初始化进程的循环链表
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list_init(&initial_proc_union.pcb.list);
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kernel_thread(initial_kernel_thread, 10, CLONE_FS | CLONE_FILES | CLONE_SIGNAL); // 初始化内核进程
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kernel_thread(initial_kernel_thread, 10, CLONE_FS | CLONE_SIGNAL); // 初始化内核进程
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initial_proc_union.pcb.state = PROC_RUNNING;
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initial_proc_union.pcb.preempt_count = 0;
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initial_proc_union.pcb.cpu_id = 0;
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// 获取新的进程的pcb
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// struct process_control_block *p = container_of(list_next(¤t_pcb->list), struct process_control_block, list);
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@ -446,17 +478,23 @@ void process_init()
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unsigned long do_fork(struct pt_regs *regs, unsigned long clone_flags, unsigned long stack_start, unsigned long stack_size)
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{
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int retval = 0;
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struct process_control_block *tsk = NULL;
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// kdebug("222\tregs.rip = %#018lx", regs->rip);
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// 获取一个物理页并在这个物理页内初始化pcb
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struct Page *pp = alloc_pages(ZONE_NORMAL, 1, PAGE_PGT_MAPPED | PAGE_KERNEL);
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tsk = (struct process_control_block *)phys_2_virt(pp->addr_phys);
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// 为新的进程分配栈空间，并将pcb放置在底部
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tsk = (struct process_control_block *)kmalloc(STACK_SIZE, 0);
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kdebug("struct process_control_block ADDRESS=%#018lx", (uint64_t)tsk);
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if (tsk == NULL)
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{
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retval = -ENOMEM;
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return retval;
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}
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memset(tsk, 0, sizeof(struct process_control_block));
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// 将当前进程的pcb复制到新的pcb内
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*tsk = *current_pcb;
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memcpy(tsk, current_pcb, sizeof(struct process_control_block));
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// kdebug("current_pcb->flags=%#010lx", current_pcb->flags);
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@ -466,12 +504,62 @@ unsigned long do_fork(struct pt_regs *regs, unsigned long clone_flags, unsigned
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// list_add(&initial_proc_union.pcb.list, &tsk->list);
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tsk->priority = 2;
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tsk->preempt_count = 0;
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++(tsk->pid);
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// 增加全局的pid并赋值给新进程的pid
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spin_lock(&process_global_pid_write_lock);
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tsk->pid = process_global_pid++;
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// 加入到进程链表中
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tsk->next_pcb = initial_proc_union.pcb.next_pcb;
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initial_proc_union.pcb.next_pcb = tsk;
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tsk->parent_pcb = current_pcb;
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spin_unlock(&process_global_pid_write_lock);
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tsk->cpu_id = proc_current_cpu_id;
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tsk->state = PROC_UNINTERRUPTIBLE;
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list_init(&tsk->list);
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list_add(&initial_proc_union.pcb.list, &tsk->list);
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// list_add(&initial_proc_union.pcb.list, &tsk->list);
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retval = -ENOMEM;
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// 拷贝标志位
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if (process_copy_flags(clone_flags, tsk))
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goto copy_flags_failed;
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// 拷贝内存空间分布结构体
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if (process_copy_mm(clone_flags, tsk))
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goto copy_mm_failed;
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// 拷贝文件
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if (process_copy_files(clone_flags, tsk))
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goto copy_files_failed;
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// 拷贝线程结构体
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if (process_copy_thread(clone_flags, tsk, stack_start, stack_size, regs))
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goto copy_thread_failed;
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// 拷贝成功
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retval = tsk->pid;
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// 唤醒进程
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process_wakeup(tsk);
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return retval;
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copy_thread_failed:;
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// 回收线程
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process_exit_thread(tsk);
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copy_files_failed:;
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// 回收文件
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process_exit_files(tsk);
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copy_mm_failed:;
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// 回收内存空间分布结构体
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process_exit_mm(tsk);
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copy_flags_failed:;
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kfree(tsk);
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return retval;
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/*
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// 将线程结构体放置在pcb的后面
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struct thread_struct *thd = (struct thread_struct *)(tsk + 1);
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memset(thd, 0, sizeof(struct thread_struct));
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@ -498,6 +586,277 @@ unsigned long do_fork(struct pt_regs *regs, unsigned long clone_flags, unsigned
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tsk->state = PROC_RUNNING;
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sched_cfs_enqueue(tsk);
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*/
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return 0;
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}
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/**
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* @brief 根据pid获取进程的pcb
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*
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* @param pid
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* @return struct process_control_block*
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*/
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struct process_control_block *process_get_pcb(long pid)
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{
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struct process_control_block *pcb = initial_proc_union.pcb.next_pcb;
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// 使用蛮力法搜索指定pid的pcb
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// todo: 使用哈希表来管理pcb
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for (; pcb != &initial_proc_union.pcb; pcb = pcb->next_pcb)
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{
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if (pcb->pid == pid)
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return pcb;
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}
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return NULL;
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}
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/**
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* @brief 将进程加入到调度器的就绪队列中
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*
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* @param pcb 进程的pcb
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*/
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static inline void process_wakeup(struct process_control_block *pcb)
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{
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pcb->state = PROC_RUNNING;
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sched_cfs_enqueue(pcb);
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}
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/**
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* @brief 拷贝当前进程的标志位
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*
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* @param clone_flags 克隆标志位
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* @param pcb 新的进程的pcb
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* @return uint64_t
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*/
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uint64_t process_copy_flags(uint64_t clone_flags, struct process_control_block *pcb)
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{
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if (clone_flags & CLONE_VM)
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pcb->flags |= PF_VFORK;
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return 0;
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}
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/**
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* @brief 拷贝当前进程的文件描述符等信息
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*
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* @param clone_flags 克隆标志位
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* @param pcb 新的进程的pcb
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* @return uint64_t
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*/
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uint64_t process_copy_files(uint64_t clone_flags, struct process_control_block *pcb)
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{
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int retval = 0;
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// 如果CLONE_FS被置位，那么子进程与父进程共享文件描述符
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// 文件描述符已经在复制pcb时被拷贝
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if (clone_flags & CLONE_FS)
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return retval;
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// 为新进程拷贝新的文件描述符
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for (int i = 0; i < PROC_MAX_FD_NUM; ++i)
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{
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if (current_pcb->fds[i] == NULL)
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continue;
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pcb->fds[i] = (struct vfs_file_t *)kmalloc(sizeof(struct vfs_file_t), 0);
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memcpy(pcb->fds[i], current_pcb->fds[i], sizeof(struct vfs_file_t));
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}
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return retval;
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}
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/**
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* @brief 回收进程的所有文件描述符
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*
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* @param pcb 要被回收的进程的pcb
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* @return uint64_t
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*/
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uint64_t process_exit_files(struct process_control_block *pcb)
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{
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// 与父进程共享文件描述符
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if (pcb->flags & PF_VFORK)
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return 0;
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for (int i = 0; i < PROC_MAX_FD_NUM; ++i)
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{
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if (pcb->fds[i] == NULL)
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continue;
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kfree(pcb->fds[i]);
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}
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memset(pcb->fds, 0, sizeof(struct vfs_file_t *) * PROC_MAX_FD_NUM);
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}
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/**
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* @brief 拷贝当前进程的内存空间分布结构体信息
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*
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* @param clone_flags 克隆标志位
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* @param pcb 新的进程的pcb
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* @return uint64_t
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*/
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uint64_t process_copy_mm(uint64_t clone_flags, struct process_control_block *pcb)
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{
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int retval = 0;
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// 与父进程共享内存空间
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if (clone_flags & CLONE_VM)
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{
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pcb->mm = current_pcb->mm;
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return retval;
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}
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// 分配新的内存空间分布结构体
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struct mm_struct *new_mms = (struct mm_struct *)kmalloc(sizeof(struct mm_struct), 0);
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memset(new_mms, 0, sizeof(struct mm_struct));
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memcpy(new_mms, current_pcb->mm, sizeof(struct mm_struct));
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pcb->mm = new_mms;
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// 分配顶层页表, 并设置顶层页表的物理地址
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new_mms->pgd = (pml4t_t *)virt_2_phys(kmalloc(PAGE_4K_SIZE, 0));
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// 拷贝内核空间的页表指针
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memcpy(phys_2_virt(new_mms->pgd) + 256, phys_2_virt(initial_proc[proc_current_cpu_id]) + 256, PAGE_4K_SIZE / 2);
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pml4t_t *current_pgd = (pml4t_t *)phys_2_virt(current_pcb->mm->pgd);
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// 迭代地拷贝用户空间
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for (int i = 0; i <= 255; ++i)
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{
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// 当前页表项为空
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if ((current_pgd + i)->pml4t == 0)
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continue;
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// 分配新的二级页表
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pdpt_t *new_pdpt = (pdpt_t *)kmalloc(PAGE_4K_SIZE, 0);
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memset(new_pdpt, 0, PAGE_4K_SIZE);
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// 在新的一级页表中设置新的二级页表表项
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set_pml4t((uint64_t *)(current_pgd + i), mk_pml4t(virt_2_phys(new_pdpt), ((current_pgd + i)->pml4t) & 0xfffUL));
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pdpt_t *current_pdpt = (pdpt_t *)phys_2_virt((current_pgd + i)->pml4t & (~0xfffUL));
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// 设置二级页表
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for (int j = 0; j < 512; ++j)
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{
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if ((current_pdpt + j)->pdpt == 0)
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continue;
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// 分配新的三级页表
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pdt_t *new_pdt = (pdt_t *)kmalloc(PAGE_4K_SIZE, 0);
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memset(new_pdt, 0, PAGE_4K_SIZE);
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// 在新的二级页表中设置三级页表的表项
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set_pdpt((uint64_t *)new_pdpt, mk_pdpt(virt_2_phys(new_pdt), (current_pdpt + j)->pdpt & 0xfffUL));
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pdt_t *current_pdt = (pdt_t *)phys_2_virt((current_pdpt + j)->pdpt & (~0xfffUL));
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// 拷贝内存页
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for (int k = 0; k < 512; ++k)
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{
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if ((current_pdt + k)->pdt == 0)
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continue;
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// 获取一个新页
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struct Page *pg = alloc_pages(ZONE_NORMAL, 1, PAGE_PGT_MAPPED);
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set_pdt((uint64_t *)(current_pdt + k), mk_pdt(pg->addr_phys, (current_pdt + k)->pdt & 0x1fffUL));
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// 拷贝数据
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memcpy(phys_2_virt(pg->addr_phys), phys_2_virt((current_pdt + k)->pdt & (~0x1fffUL)), PAGE_2M_SIZE);
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}
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}
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}
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return retval;
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}
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/**
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* @brief 释放进程的页表
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*
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* @param pcb 要被释放页表的进程
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* @return uint64_t
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*/
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uint64_t process_exit_mm(struct process_control_block *pcb)
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||||
{
|
||||
if (pcb->flags & CLONE_VM)
|
||||
return 0;
|
||||
if (pcb->mm == NULL)
|
||||
{
|
||||
kdebug("pcb->mm==NULL");
|
||||
return 0;
|
||||
}
|
||||
if (pcb->mm->pgd == NULL)
|
||||
{
|
||||
kdebug("pcb->mm->pgd==NULL");
|
||||
return 0;
|
||||
}
|
||||
// 获取顶层页表
|
||||
pml4t_t *current_pgd = (pml4t_t *)phys_2_virt(pcb->mm->pgd);
|
||||
|
||||
// 迭代地释放用户空间
|
||||
for (int i = 0; i <= 255; ++i)
|
||||
{
|
||||
// 当前页表项为空
|
||||
if ((current_pgd + i)->pml4t == 0)
|
||||
continue;
|
||||
|
||||
// 二级页表entry
|
||||
pdpt_t *current_pdpt = (pdpt_t *)phys_2_virt((current_pgd + i)->pml4t & (~0xfffUL));
|
||||
// 遍历二级页表
|
||||
for (int j = 0; j < 512; ++j)
|
||||
{
|
||||
if ((current_pdpt + j)->pdpt == 0)
|
||||
continue;
|
||||
|
||||
// 三级页表的entry
|
||||
pdt_t *current_pdt = (pdt_t *)phys_2_virt((current_pdpt + j)->pdpt & (~0xfffUL));
|
||||
|
||||
// 释放三级页表的内存页
|
||||
for (int k = 0; k < 512; ++k)
|
||||
{
|
||||
if ((current_pdt + k)->pdt == 0)
|
||||
continue;
|
||||
// 释放内存页
|
||||
free_pages(Phy_to_2M_Page((current_pdt + k)->pdt & (~0x1fffUL)), 1);
|
||||
}
|
||||
// 释放三级页表
|
||||
kfree(current_pdt);
|
||||
}
|
||||
// 释放二级页表
|
||||
kfree(current_pdpt);
|
||||
}
|
||||
// 释放顶层页表
|
||||
kfree(current_pgd);
|
||||
|
||||
// 释放内存空间分布结构体
|
||||
kfree(pcb->mm);
|
||||
|
||||
return 0;
|
||||
}
|
||||
/**
|
||||
* @brief 拷贝当前进程的线程结构体
|
||||
*
|
||||
* @param clone_flags 克隆标志位
|
||||
* @param pcb 新的进程的pcb
|
||||
* @return uint64_t
|
||||
*/
|
||||
uint64_t process_copy_thread(uint64_t clone_flags, struct process_control_block *pcb, uint64_t stack_start, uint64_t stack_size, struct pt_regs *current_regs)
|
||||
{
|
||||
// 将线程结构体放置在pcb后方
|
||||
struct thread_struct *thd = (struct thread_struct *)(pcb + 1);
|
||||
memset(thd, 0, sizeof(struct thread_struct));
|
||||
pcb->thread = thd;
|
||||
|
||||
// 拷贝栈空间
|
||||
struct pt_regs *child_regs = (struct pt_regs *)((uint64_t)pcb + STACK_SIZE - sizeof(struct pt_regs));
|
||||
memcpy(child_regs, current_regs, sizeof(struct pt_regs));
|
||||
|
||||
child_regs->rax = 0;
|
||||
child_regs->rsp = stack_start;
|
||||
|
||||
thd->rbp = (uint64_t)pcb + STACK_SIZE;
|
||||
thd->rsp = (uint64_t)child_regs;
|
||||
thd->fs = current_pcb->thread->fs;
|
||||
thd->gs = current_pcb->thread->gs;
|
||||
|
||||
// 根据是否为内核线程，设置进程的开始执行的地址
|
||||
if (pcb->flags & PF_KTHREAD)
|
||||
thd->rip = (uint64_t)kernel_thread_func;
|
||||
else
|
||||
thd->rip = (uint64_t)ret_from_system_call;
|
||||
kdebug("new proc's ret addr = %#018lx\tchild_regs->rsp = %#018lx", child_regs->rbx, child_regs->rsp);
|
||||
return 0;
|
||||
}
|
||||
@ -15,7 +15,7 @@
|
||||
#include "../mm/mm.h"
|
||||
#include "../syscall/syscall.h"
|
||||
#include "ptrace.h"
|
||||
|
||||
#include <common/errno.h>
|
||||
#include <filesystem/VFS/VFS.h>
|
||||
|
||||
// 进程最大可拥有的文件描述符数量
|
||||
@ -46,9 +46,9 @@
|
||||
#define USER_DS (0x30)
|
||||
|
||||
// 进程初始化时的数据拷贝标志位
|
||||
#define CLONE_FS (1 << 0)
|
||||
#define CLONE_FILES (1 << 1)
|
||||
#define CLONE_SIGNAL (1 << 2)
|
||||
#define CLONE_FS (1 << 0) // 在进程间共享打开的文件
|
||||
#define CLONE_SIGNAL (1 << 1)
|
||||
#define CLONE_VM (1 << 2) // 在进程间共享虚拟内存空间
|
||||
|
||||
/**
|
||||
* @brief 内存空间分布结构体
|
||||
@ -63,6 +63,8 @@ struct mm_struct
|
||||
ul data_addr_start, data_addr_end;
|
||||
// 只读数据段空间
|
||||
ul rodata_addr_start, rodata_addr_end;
|
||||
// BSS段的空间
|
||||
uint64_t bss_start, bss_end;
|
||||
// 动态内存分配区（堆区域）
|
||||
ul brk_start, brk_end;
|
||||
// 应用层栈基地址
|
||||
@ -89,8 +91,10 @@ struct thread_struct
|
||||
|
||||
// ========= pcb->flags =========
|
||||
// 进程标志位
|
||||
#define PF_KTHREAD (1UL << 0)
|
||||
#define PROC_NEED_SCHED (1UL << 1) // 进程需要被调度
|
||||
#define PF_KTHREAD (1UL << 0) // 内核线程
|
||||
#define PF_NEED_SCHED (1UL << 1) // 进程需要被调度
|
||||
#define PF_VFORK (1UL << 2) // 标志进程是否由于vfork而存在资源共享
|
||||
|
||||
/**
|
||||
* @brief 进程控制块
|
||||
*
|
||||
@ -110,7 +114,7 @@ struct process_control_block
|
||||
// 进程切换时保存的状态信息
|
||||
struct thread_struct *thread;
|
||||
|
||||
// 连接各个pcb的双向链表
|
||||
// 连接各个pcb的双向链表（todo：删除这个变量）
|
||||
struct List list;
|
||||
|
||||
// 地址空间范围
|
||||
@ -125,6 +129,11 @@ struct process_control_block
|
||||
// 进程拥有的文件描述符的指针数组
|
||||
// todo: 改用动态指针数组
|
||||
struct vfs_file_t *fds[PROC_MAX_FD_NUM];
|
||||
|
||||
// 链表中的下一个pcb
|
||||
struct process_control_block *next_pcb;
|
||||
// 父进程的pcb
|
||||
struct process_control_block *parent_pcb;
|
||||
};
|
||||
|
||||
// 将进程的pcb和内核栈融合到一起,8字节对齐
|
||||
@ -148,7 +157,9 @@ union proc_union
|
||||
.priority = 2, \
|
||||
.preempt_count = 0, \
|
||||
.cpu_id = 0, \
|
||||
.fds = { 0 } \
|
||||
.fds = {0}, \
|
||||
.next_pcb = &proc, \
|
||||
.parent_pcb = &proc \
|
||||
}
|
||||
|
||||
/**
|
||||
@ -254,6 +265,27 @@ void process_init();
|
||||
*/
|
||||
unsigned long do_fork(struct pt_regs *regs, unsigned long clone_flags, unsigned long stack_start, unsigned long stack_size);
|
||||
|
||||
/**
|
||||
* @brief 根据pid获取进程的pcb
|
||||
*
|
||||
* @param pid
|
||||
* @return struct process_control_block*
|
||||
*/
|
||||
struct process_control_block *process_get_pcb(long pid);
|
||||
|
||||
/**
|
||||
* @brief 切换页表
|
||||
* @param prev 前一个进程的pcb
|
||||
* @param next 下一个进程的pcb
|
||||
*
|
||||
*/
|
||||
#define process_switch_mm(prev, next) \
|
||||
do \
|
||||
{ \
|
||||
asm volatile("movq %0, %%cr3 \n\t" ::"r"(next->mm->pgd) \
|
||||
: "memory"); \
|
||||
} while (0)
|
||||
|
||||
// 获取当前cpu id
|
||||
#define proc_current_cpu_id (current_pcb->cpu_id)
|
||||
|
||||
|
||||
@ -51,13 +51,13 @@ void sched_cfs_enqueue(struct process_control_block *pcb)
|
||||
void sched_cfs()
|
||||
{
|
||||
cli();
|
||||
current_pcb->flags &= ~PROC_NEED_SCHED;
|
||||
current_pcb->flags &= ~PF_NEED_SCHED;
|
||||
struct process_control_block *proc = sched_cfs_dequeue();
|
||||
|
||||
if (current_pcb->virtual_runtime >= proc->virtual_runtime || current_pcb->state != PROC_RUNNING) // 当前进程运行时间大于了下一进程的运行时间，进行切换
|
||||
{
|
||||
|
||||
if (current_pcb->state = PROC_RUNNING) // 本次切换由于时间片到期引发，则再次加入就绪队列，否则交由其它功能模块进行管理
|
||||
if (current_pcb->state == PROC_RUNNING) // 本次切换由于时间片到期引发，则再次加入就绪队列，否则交由其它功能模块进行管理
|
||||
sched_cfs_enqueue(current_pcb);
|
||||
|
||||
if (sched_cfs_ready_queue[proc_current_cpu_id].cpu_exec_proc_jiffies <= 0)
|
||||
@ -75,6 +75,7 @@ void sched_cfs()
|
||||
}
|
||||
}
|
||||
// kdebug("before switch, next.rip = %#018lx\tnext->gs=%#018lx", proc->thread->rip, proc->thread->gs);
|
||||
process_switch_mm(current_pcb, proc);
|
||||
switch_proc(current_pcb, proc);
|
||||
}
|
||||
else // 不进行切换
|
||||
@ -127,7 +128,7 @@ void sched_update_jiffies()
|
||||
}
|
||||
// 时间片耗尽，标记可调度
|
||||
if (sched_cfs_ready_queue[proc_current_cpu_id].cpu_exec_proc_jiffies <= 0)
|
||||
current_pcb->flags |= PROC_NEED_SCHED;
|
||||
current_pcb->flags |= PF_NEED_SCHED;
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
@ -336,6 +336,17 @@ uint64_t sys_lseek(struct pt_regs *regs)
|
||||
return retval;
|
||||
}
|
||||
|
||||
uint64_t sys_fork(struct pt_regs *regs)
|
||||
{
|
||||
kdebug("sys_fork");
|
||||
return do_fork(regs, 0, regs->rsp, 0);
|
||||
}
|
||||
uint64_t sys_vfork(struct pt_regs *regs)
|
||||
{
|
||||
kdebug("sys vfork");
|
||||
return do_fork(regs, CLONE_VM | CLONE_FS | CLONE_SIGNAL, regs->rsp, 0);
|
||||
}
|
||||
|
||||
ul sys_ahci_end_req(struct pt_regs *regs)
|
||||
{
|
||||
ahci_end_request();
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user