使用Rust从0自研内核，具有Linux兼容性的操作系统，面向云计算轻量化场景而设计。DragonOS is an operating system developed from scratch using Rust, with Linux compatibility. It is designed for lightweight cloud computing scenarios.
Home Page: https://dragonos.org
License: GNU General Public License v2.0
获取时间戳
Tracking issue for:
Tracking issue for:
在xhci中断处理最后向Event Ring Dequeue Pointer Register（ERDP）寄存器中写入的值是否正确？
在参阅xhci.c源码时发现在xhci_hc_irq_handler中断处理函数中，当结束对event ring中event trb的处理后，向ERDP寄存器写入了新的dequeue pointer值，写入的新值为virt_2_phys(last_event_ring_vaddr)，即最后一个处理完的event trb的地址。
last_event_ring_vaddr = xhci_hc[cid].current_event_ring_vaddr;
xhci_hc[cid].current_event_ring_vaddr += sizeof(struct xhci_TRB_t);
......
xhci_write_intr_reg64(cid, 0, XHCI_IR_DEQUEUE, virt_2_phys(last_event_ring_vaddr) | (1 << 3));
但是，我在参阅其他XHCI相应源码时发现，其向中断处理后向ERDP写入的值是下一个要处理的event trb地址，以上述代码为例应该是如下所示：
xhci_hc[cid].current_event_ring_vaddr += sizeof(struct xhci_TRB_t);
......
xhci_write_intr_reg64(cid, 0, XHCI_IR_DEQUEUE, virt_2_phys( xhci_hc[cid].current_event_ring_vaddr) | (1 << 3));
以下是我参阅的其他XHCI源码：
//[haikuOS]:src/add-ons/kernel/busses/usb/xhci.cpp:ProcessEvents()
......
uint16 i = fEventIdx;
......
HandleXXX(&fEventRing[i]);
......
i++;
fEventIdx = i;
......
uint64 addr = fErst->rs_addr + i * sizeof(xhci_trb);
WriteRunReg32(XHCI_ERDP_LO(0), (uint32)addr | ERDP_BUSY);
WriteRunReg32(XHCI_ERDP_HI(0), (uint32)(addr >> 32));
//[linux2.6.39]:drivers/usb/host/xhci-ring.c:xhci_irq(struct usb_hcd *hcd)
......
event_ring_deq = xhci->event_ring->dequeue;
xhci_handle_event(xhci);
temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
if (event_ring_deq != xhci->event_ring->dequeue) {
deq = xhci_trb_virt_to_dma(xhci->event_ring->deq_seg,
xhci->event_ring->dequeue);
if (deq == 0)
xhci_warn(xhci, "WARN something wrong with SW event "
"ring dequeue ptr.\n");
/* Update HC event ring dequeue pointer */
temp_64 &= ERST_PTR_MASK;
temp_64 |= ((u64) deq & (u64) ~ERST_PTR_MASK);
}
/* Clear the event handler busy flag (RW1C); event ring is empty. */
temp_64 |= ERST_EHB;
xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue);
//[CherryUSB]:port/xhci/usb_hc_xhci.c:USBH_IRQHandler(void)
/* move ring index, notify xhci */
nidx++; /* head to next trb */
if (nidx == XHCI_RING_ITEMS) {
nidx = 0; /* roll-back if reach end of list */
cs = cs ? 0 : 1;
evts->cs = cs; /* sw toggle cycle state */
}
evts->nidx = nidx;
uint64_t erdp = (uint64_t)(evts->ring + nidx);
writeq(xhci->ir + XHCI_REG_RT_IR_ERDP, erdp | XHCI_REG_RT_IR_ERDP_EHB); /* bit[63:4] update current event ring dequeue pointer */
4.9.4 Event Ring Management
If the Cycle bit of the Event TRB pointed to by
the Event Ring Dequeue Pointer equals CCS, then the Event TRB is a valid event,
software processes it and advances the Event Ring Dequeue Poi nter. If the Event
TRB Cycle bit is not equal to CCS, then software stops processing Event TRBs
and waits for an interrupt from the xHC for the Event Ring. When the interrupt
occurs, software picks up where it left off, checking the Cycle bit of the Event
TRB pointed to by the Event Ring Dequeue Pointer against its CCS bit.
这里的陈述可以得知ERDP指向的trb是下一个要处理的trb。
但是：
5.5.2.3.3 Event Ring Dequeue Pointer Register (ERDP)
Dequeue ERST Segment Index (DESI) usage:
When software finishes processing an Event TRB, it will write the address of that
Event TRB to the ERDP. Before enqueuing an Event, the xHC shall check that
space is available on the Event Ring. This check can be skipped if the xHC is
currently enqueuing Event TRBs in a different ERST segment than the one that
software is using to dequeue Events.
这里的一段又说将处理完的trb地址填入ERDP中。
BUG: 处理器不支持x2APIC时，系统会崩溃
我使用的是Ubuntu22.04,shell是zsh，而环境变量只会在bash的配置文档中设置。使用的是zsh的话make run时会提示没有安装交叉编译器。手动修改zsh的环境变量后才可运行
画面输出会卡死在这一行：
initial proc running... arg:0x000000000000000a, vruntime=0[ INFO ]
以下是串口输出的全文（后面一直在死循环，太长了就不放了）：
uart init
Video driver initialized.
textui_install_handlertextui_enable_handler
text ui initialized
[ INFO ] Kernel Starting...
[ DEBUG ] (main.c:80) _stack_start=0xffff800000278000
[ INFO ] Initializing memory management unit...
[ INFO ] Total amounts of RAM : 4580352 bytes
[ INFO ] Total amounts of 2M pages : 254.
[ INFO ] Memory management unit initialize complete!
[ INFO ] Initializing SLAB...
[ INFO ] SLAB initialized successfully!
[ INFO ] Re-Initializing page table...
[ INFO ] Page table Initialized. Affects:254
[ INFO ] mmio_init success
[ INFO ] Re-mapping VBE frame buffer...
[ INFO ] VBE frame buffer successfully Re-mapped!
[ INFO ] Initializing ACPI...
[ DEBUG ] (acpi.c:196) rsdpv1->RsdtAddress=0x000000001ffe196e
[ DEBUG ] (acpi.c:207) RSDT mapped!
RSDT Length=52bytes.
RSDT Entry num=4
[ INFO ] ACPI module initialized!
[ DEBUG ] (src/sched/rt.rs:28) rt scheduler init
[ DEBUG ] (apic/apic.c:374) 8259A Masked.
[ DEBUG ] (apic/apic.c:290) This computer support APIC&xAPIC
[ DEBUG ] (apic/apic.c:304) This computer support x2APIC
[ INFO ] xAPIC & x2APIC enabled!
[ INFO ] APIC Software Enabled.
[ DEBUG ] (apic/apic.c:240) local APIC Version:0x00000014,Max LVT Entry:0x00000006,SVR(Suppress EOI Broadcast):0x00
[ DEBUG ] (apic/apic.c:246) Integrated APIC.
[ DEBUG ] (apic/apic.c:266) All LVT Masked
[ DEBUG ] (apic/apic.c:104) IO APIC Version=17, Max Redirection Entries=24
[ WARN ] Cannot get RCBA address. RCBA_phys=0xffffffff
[ INFO ] Initializing softirq...
[ INFO ] Initializing syscall...
[ DEBUG ] (src/time/timer.rs:177) timer initiated successfully
[ DEBUG ] (smp.c:57) total_processor_num=2
[ DEBUG ] (smp.c:68) [core 0] acpi processor UID=0, APIC ID=0, flags=0x00000001
[ DEBUG ] (smp.c:68) [core 1] acpi processor UID=1, APIC ID=1, flags=0x00000001
[ SUCCESS ] AP core 1 successfully started!
[ INFO ] [ INFO ] Initializing AP-core's local apic...Cleaning page table remapping...
[ DEBUG ] (smp.c:139) [ INFO ] init proc's preempt_count=0xAPIC & x2APIC enabled!
[ INFO ] [ INFO ] APIC Software Enabled.Successfully cleaned page table remapping!
[ DEBUG ] (apic/apic.c:240) [ INFO ] ProcFS mounted.
local APIC Version:0x00000014,Max LVT Entry:0x00000006,SVR(Suppress EOI Broadcast):0x00 [ INFO ] DevFS mounted.
[ INFO ] Successfully initialized VFS!
[ DEBUG ] (apic/apic.c:246) [ INFO ] Integrated APIC.CPU manufacturer: GenuineIntel
[ DEBUG ] (apic/apic.c:266) [ INFO ] All LVT MaskedCPU Brand Name: Intel Xeon E3-12xx v2 (Ivy Bridge)
[ INFO ] Family ID=0x6 Extended Family ID=0x0 Processor Type=0x0
[ INFO ] Model ID=0xa Extended Model ID=0x3 Stepping ID=0x9
[ INFO ] Cpu_max_phys_addrline_size = 40
[ INFO ] Cpu_max_linear_addrline_size = 48
[ INFO ] Max basic mop=0x014
[ INFO ] Max extended mop=0x8000000a
[ INFO ] ps/2 keyboard registered.
[ INFO ] Initializing PCI bus...
[ INFO ] Checking all devices in PCI bus...
[ INFO ] Total pci device and function num = 5
[ INFO ] [ pci device 0 ] class code = 6 subclass=0 status=0x00000000
[ INFO ] [ pci device 1 ] class code = 12 subclass=3 status=0x00000010 cap_pointer=0x00000090 bar5=0x00000000, vendor=0x001b36, device id=0x00000d
[ INFO ] [ pci device 2 ] class code = 1 subclass=6 status=0x00000010 cap_pointer=0x00000080 bar5=0xfeb95000, vendor=0x008086, device id=0x002922
[ INFO ] [ pci device 3 ] class code = 2 subclass=0 status=0x00000010 cap_pointer=0x00000084 bar5=0x00000000, vendor=0x001af4, device id=0x001000
[ INFO ] [ pci device 4 ] class code = 3 subclass=0 status=0x00000000
[ INFO ] PCI bus initialized.
[ INFO ] Initializing HPET...
[ DEBUG ] (HPET/HPET.c:272) hpet_table->address=0x00000000fed00000
[ DEBUG ] (HPET/HPET.c:274) HPET_REG_BASE=0xffffa000fed00000
[ DEBUG ] (HPET/HPET.c:283) HPET_COUNTER_CLK_PERIOD=0x0000000000989680
[ INFO ] Total HPET timers: 2
[ INFO ] HPET driver Initialized.
[ INFO ] Measuring local APIC timer's frequency...
[ INFO ] Local APIC timer's freq: 324283 ticks/ms.
[ INFO ] TSC frequency: 2806MHz
[ INFO ] Initializing process...
[ DEBUG ] (process.c:708) Initial process to init files
[ DEBUG ] (process.c:710) Initial process init files ok
[ INFO ] Initializing kthread mechanism...
[ INFO ] HPET0 enabled.
[ INFO ] Initializing apic timer for cpu 0
[ INFO ] Initializing apic timer for cpu 1[ INFO ]
initial proc running... arg:0x000000000000000a, vruntime=0[ INFO ]
##kitnhirt edaoudb ldea ebmuofnf esrt#a#r
t#e#dt!o
c
hange double buffer##
[ DEBUG ] (video.c:148) register softirq video done
#[# iEnRiRtOiRa l]i dzoe_dp daoubgele_ fbuafufelr#t#(1
4),Error code :0x0000000000000000,RSP:0xffff80000182ff80, RBP=0xffff80000182ffb0, RIP:0xffff800000133afd CPU:1, pid=3
[ INFO ]
Initializing AHCI...[
ERROR[ DEBUG ] (pci.c:492) ] [2] class_code=1, sub_class=6, progIF=1, bar5=0xfeb95000regs->rax = 0x0000000000000000
[ INFO ] Page Not-Present, ABAR mapped!Read Cause Fault,
Fault in supervisor(0,1,2) [ DEBUG ] (src/driver/disk/ahci/mod.rs:106) <ahci_rust_init> Find a SATA type Disk.
[ DEBUG ] (src/driver/disk/ahci/mod.rs:136) start register ahci device
CR2:0x0000000000000000
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
======== Kernel traceback =======
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
function:video_refresh_daemon() (+) 0105 address:0xffff800000133afd
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
rbp:0xffff80000182ffb0,*rbp:0xffff80000182fff0
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
function:kthread() (+) 0153 address:0xffff800000147884
[ INFO ] Try to mount FAT32 as root fs...
rbp:0xffff80000182fff0,*rbp:0x0000000000000000
[ INFO ] VFS: Migrating filesystems...
function:kernel_thread_func() (+) 0045 address:0xffff80000014a0d9
[ INFO ] VFS: Migrate filesystems done!
======== Kernel traceback end =======
[ INFO ] Successfully migrate rootfs to FAT32!
[ [ DEBUG ] (pci.c:492) [3] class_code=2, sub_class=0, progIF=0, bar5=0x00000000
[ DEBUG ] (src/driver/pci/pci.rs:438) pci_device_bar:
Bar0:I/O space at 0x0000c020, size 32
Bar1:Unused bar
Bar2:Unused bar
Bar3:Unused bar
Bar4:Memory space at 0xfe000000, size 16384, type Width64, prefetchable true,mapped at 0xffffa1ffffbfc000
Bar5:Unused bar
[ DEBUG ] (src/driver/virtio/virtio.rs:22) Detected virtio PCI device with device type Network, features 0x0000000130bf8024
[ DEBUG ] (src/driver/virtio/virtio.rs:85) Virtio-net driver init successfully.
[ DEBUG ] (src/driver/virtio/virtio.rs:129) virtio_net MAC=[82, 84, 0, 18, 52, 86]
[ DEBUG ] (src/driver/virtio/virtio.rs:130) virtio-net test finished
[ INFO ] LZ4 lib Version=1.9.3
__rust_demo_func()
[ DEBUG ] (process.c:593) in initial_kernel_thread: flags=4
____ ___ ____
| _ \ _ __ __ _ __ _ ___ _ __ / _ \ / ___|
| | | || '__| / _` | / _` | / _ \ | 'ERR_O R\ ]| d o|_ pa| ge|_\_f_aul_t( 14\) , Er
r|o r |c_o|d e| |: 0|x 0 0 0|0 0(0_0|0 0|0|0 0(0_0|00 ,|R|S P(:_0x)ff f|f8|0 0|00 18|2 f|f|80 ,| _R|BP =| 0_x_f_f)f f|8
0|0_0_0_1_8/2 ff|b_0|, R I P\:_0_x,f_ff|f 8\000_0_0,1 3|3 af\d_ C_P_U/:1 , |p_i|d =|3_
|
[\ _E_R_R/O R| _]_ _r_e/g s
- > r a x = 0 x 0 00 00 00 0 0 0 0 00 0 00
|P_a_g_e/ N o t-P r e
s
e
n[tD,r aRgeoandO SC]a u/s e# Fault, Fault in supervisor(0,1,2)
CR2:0x0000000000000000
======== Kernel traceback =======
function:video_refresh_daemon() (+) 0105 address:0xffff800000133afd
rbp:0xffff80000182ffb0,*rbp:0xffff80000182fff0
function:kthread() (+) 0153 address:0xffff800000147884
rbp:0xffff80000182fff0,*rbp:0x0000000000000000
function:kernel_thread_func() (+) 0045 address:0xffff80000014a0d9
======== Kernel traceback end =======
[ ERROR ] do_page_fault(14),Error code :0x0000000000000000,RSP:0xffff80000182ff80, RBP=0xffff80000182ffb0, RIP:0xffff800000133afd CPU:1, pid=3
[ ERROR ] regs->rax = 0x0000000000000000
Page Not-Present, Read Cause Fault, Fault in supervisor(0,1,2)
CR2:0x0000000000000000
======== Kernel traceback =======
function:video_refresh_daemon() (+) 0105 address:0xffff800000133afd
rbp:0xffff80000182ffb0,*rbp:0xffff80000182fff0
function:kthread() (+) 0153 address:0xffff800000147884
rbp:0xffff80000182fff0,*rbp:0x0000000000000000
function:kernel_thread_func() (+) 0045 address:0xffff80000014a0d9
======== Kernel traceback end =======
[ ERROR ] do_page_fault(14),Error code :0x0000000000000000,RSP:0xffff80000182ff80, RBP=0xffff80000182ffb0, RIP:0xffff800000133afd CPU:1, pid=3
[ ERROR ] regs->rax = 0x0000000000000000
Page Not-Present, Read Cause Fault, Fault in supervisor(0,1,2)
CR2:0x0000000000000000
======== Kernel traceback =======
function:video_refresh_daemon() (+) 0105 address:0xffff800000133afd
rbp:0xffff80000182ffb0,*rbp:0xffff80000182fff0
function:kthread() (+) 0153 address:0xffff800000147884
rbp:0xffff80000182fff0,*rbp:0x0000000000000000
hello, wrong file descriptor, when make run
nm -n /lyndon/iProject/rustpath/src/github.com/DragonOS/kernel/src/kernel | ./kallsyms > kallsyms.S
/home/zxh/opt/dragonos-gcc/gcc-x86_64-unknown-none/bin/x86_64-elf-gcc -c kallsyms.S -o kallsyms.o
Kallsyms generated.
make[4]: 离开目录“/lyndon/iProject/rustpath/src/github.com/DragonOS/kernel/src/debug”
Re-Linking kernel...
./main.o ./head.o ./time/timer.o ./time/sleep.o ./common/math/pow.o ./common/math/fabs.o ./common/math/round.o ./filesystem/MBR.c.o ./filesystem/procfs/procfs.c.o ./filesystem/devfs/chardev.c.o ./filesystem/devfs/devfs.c.o ./filesystem/vfs/dcache.c.o ./filesystem/vfs/VFS.c.o ./filesystem/vfs/mount.c.o ./filesystem/block.c.o ./filesystem/rootfs/rootfs.c.o ./filesystem/fat32/fat_ent.c.o ./filesystem/fat32/fat32.c.o ./driver/video/video.o ./driver/timers/HPET/HPET.o ./driver/interrupt/pic.o ./driver/interrupt/apic/apic_timer.o ./driver/keyboard/ps2_keyboard.o ./driver/disk/ata.o ./driver/disk/ahci/ahci.o ./driver/acpi/acpi.o ./driver/usb/xhci/xhci.o ./driver/usb/usb.o ./driver/hid/hidparse.c.o ./driver/hid/hidstrings.c.o ./driver/multiboot2/multiboot2.o ./driver/pci/msi.o ./driver/pci/pci.o ./driver/mouse/ps2_mouse.o ./driver/tty/tty.o ./syscall/syscall.o ./process/fork.c.o ./process/process.c.o ./process/procs.o ./process/kthread.c.o ./ktest/test-bitree.o ./ktest/test-kfifo.o ./ktest/ktest.o ./ktest/test-mutex.o ./ktest/test-idr.o ./sched/completion.c.o ./sched/core.c.o ./libs/cpu.c.o ./libs/printk.c.o ./libs/crc32.c.o ./libs/libELF/elf.o ./libs/kfifo.c.o ./libs/crc16.c.o ./libs/libUI/textui.o ./libs/libUI/textui-render.o ./libs/libUI/screen_manager.o ./libs/crc64.c.o ./libs/bitree.c.o ./libs/idr.c.o ./libs/crc7.c.o ./libs/wait_queue.c.o ./libs/glib.c.o ./libs/unistd.c.o ./libs/lz4.c.o ./libs/semaphore.c.o ./libs/string.c.o ./libs/mutex.c.o ./libs/stdlib.c.o ./libs/lockref.c.o ./libs/sys/wait.c.o ./libs/crc8.c.o ./libs/wait_queue_head.c.o ./mm/vma.o ./mm/slab.o ./mm/utils.o ./mm/mmio.o ./mm/mmio-buddy.o ./mm/mm-stat.o ./mm/mmap.o ./mm/mm.o ./arch/x86_64/ia64_msi.c.o ./arch/x86_64/x86_64_ipi.c.o ./arch/x86_64/asm/cmpxchg.c.o ./arch/x86_64/asm/spinlock.c.o ./exception/entry.o ./exception/trap.o ./exception/irq.o ./smp/apu_boot.o ./smp/smp.o ./debug/traceback/traceback.o ./io/block/block_io_scheduler.c.o ./ipc/pipe.o
ld -b elf64-x86-64 -z muldefs -o kernel head.o main.o ./main.o ./head.o ./time/timer.o ./time/sleep.o ./common/math/pow.o ./common/math/fabs.o ./common/math/round.o ./filesystem/MBR.c.o ./filesystem/procfs/procfs.c.o ./filesystem/devfs/chardev.c.o ./filesystem/devfs/devfs.c.o ./filesystem/vfs/dcache.c.o ./filesystem/vfs/VFS.c.o ./filesystem/vfs/mount.c.o ./filesystem/block.c.o ./filesystem/rootfs/rootfs.c.o ./filesystem/fat32/fat_ent.c.o ./filesystem/fat32/fat32.c.o ./driver/video/video.o ./driver/timers/HPET/HPET.o ./driver/interrupt/pic.o ./driver/interrupt/apic/apic_timer.o ./driver/keyboard/ps2_keyboard.o ./driver/disk/ata.o ./driver/disk/ahci/ahci.o ./driver/acpi/acpi.o ./driver/usb/xhci/xhci.o ./driver/usb/usb.o ./driver/hid/hidparse.c.o ./driver/hid/hidstrings.c.o ./driver/multiboot2/multiboot2.o ./driver/pci/msi.o ./driver/pci/pci.o ./driver/mouse/ps2_mouse.o ./driver/tty/tty.o ./syscall/syscall.o ./process/fork.c.o ./process/process.c.o ./process/procs.o ./process/kthread.c.o ./ktest/test-bitree.o ./ktest/test-kfifo.o ./ktest/ktest.o ./ktest/test-mutex.o ./ktest/test-idr.o ./sched/completion.c.o ./sched/core.c.o ./libs/cpu.c.o ./libs/printk.c.o ./libs/crc32.c.o ./libs/libELF/elf.o ./libs/kfifo.c.o ./libs/crc16.c.o ./libs/libUI/textui.o ./libs/libUI/textui-render.o ./libs/libUI/screen_manager.o ./libs/crc64.c.o ./libs/bitree.c.o ./libs/idr.c.o ./libs/crc7.c.o ./libs/wait_queue.c.o ./libs/glib.c.o ./libs/unistd.c.o ./libs/lz4.c.o ./libs/semaphore.c.o ./libs/string.c.o ./libs/mutex.c.o ./libs/stdlib.c.o ./libs/lockref.c.o ./libs/sys/wait.c.o ./libs/crc8.c.o ./libs/wait_queue_head.c.o ./mm/vma.o ./mm/slab.o ./mm/utils.o ./mm/mmio.o ./mm/mmio-buddy.o ./mm/mm-stat.o ./mm/mmap.o ./mm/mm.o ./arch/x86_64/ia64_msi.c.o ./arch/x86_64/x86_64_ipi.c.o ./arch/x86_64/asm/cmpxchg.c.o ./arch/x86_64/asm/spinlock.c.o ./exception/entry.o ./exception/trap.o ./exception/irq.o ./smp/apu_boot.o ./smp/smp.o ./debug/traceback/traceback.o ./io/block/block_io_scheduler.c.o ./ipc/pipe.o ../target/x86_64-unknown-none/release/libdragonos_kernel.a ./debug/kallsyms.o -T link.lds
Generating kernel ELF file...
/home/zxh/opt/dragonos-gcc/gcc-x86_64-unknown-none/bin/x86_64-elf-objcopy -I elf64-x86-64 -O elf64-x86-64 -R ".comment" -R ".eh_frame" kernel ../../bin/kernel/kernel.elf
/home/zxh/opt/dragonos-gcc/gcc-x86_64-unknown-none/bin/x86_64-elf-objcopy: ../../bin/kernel/kernel.elf: 错误的文件描述符
make[3]: *** [Makefile:51：all] 错误 1
make[3]: 离开目录“/lyndon/iProject/rustpath/src/github.com/DragonOS/kernel/src”
make[2]: *** [Makefile:4：all] 错误 2
make[2]: 离开目录“/lyndon/iProject/rustpath/src/github.com/DragonOS/kernel”
内核编译失败
make[1]: *** [Makefile:48：kernel] 错误 1
make[1]: 离开目录“/lyndon/iProject/rustpath/src/github.com/DragonOS”
make: *** [Makefile:106：run] 错误 2
您的功能请求是否与问题/故障有关？请描述一下。
我希望使用sscanf()函数来便捷的实现free指令（因为需要从meminfo文件中读取并格式化数据
描述您想要的解决方案
在stdio.h中添加sscanf()函数
使用ls命令前后，再使用free命令，会发现内存泄露了几个字节
如题，当使用
printf("%.2lf,1.26);`时，将会在va_arg的那一行，由于movaps指令，产生错误。
问题：编译错误时,make命令的返回码为0。并且，编译错误时，sudo bash run.sh仍能启动虚拟机
复现：
make命令echo $?，发现输出的上一命令返回值为0示例：
总之需要对..进行额外检查
另外cd //会跳转到//下，ls显示正常，此时cd bin/..会跳转到///bin/..下
bug: 当计算机上不存在ps2键盘控制器时，初始化ps2键盘控制器时将卡死的问题
描述错误
process.c 中第836行调用process_exit_mm()后，在使用默认编译器的情况下，多次调用exec bin/test_gettimeofday报错，输出mm->pgd发现其出现相同值。目前将其暂时注释。
请填写您的电脑的信息：
重现步骤
重现行为的步骤：
屏幕截图
Tracking issue for:
bug: 在仅支持xapic的物理机或bochs虚拟机上启动时，当apic初始化完毕后，会收到未知的中断。出现在irq.h的apic_init()函数中，sti()后将收到该中断。
经分析，该中断来源于连接着类8259PIC的时钟。
但是问题在于：
初始化apic时，已向0x21、0xa1端口写入了0xff以屏蔽中断。但貌似这些屏蔽没有用。
描述错误
由于对TTY_DEVICE.get("tty0")的返回值unwrap失败引起Kernel Panic，应该是在ps2_init的时候还没有初始化tty设备
请填写您的电脑的信息：
系统日志
serial_opt.txt
错误原因
21号系统调用被移除
请填写您的电脑的信息：
期望行为
成功执行free，查看内存使用情况
需求
我希望了解如何修复该bug，实现free
OS统一驱动接口需要实现的效果：
将当前的sched_cfs函数做一个包裹，套一层sched().为接下来实现多种调度机制做准备
描述错误
old libc 中可以调用fork，在 relibc 中无法调用，猜测应该跟 fork 还没写到 syscall 的系统调用中有关
请填写您的电脑的信息：
重现步骤
重现行为的步骤：
编写一段父子进程分别打印hello的代码，链接old libc库时能正常运行，链接 relibc 库时报错
屏幕截图
描述错误
启动阶段 Current PCB 空指针异常
请填写您的电脑的信息：
重现步骤
重现行为的步骤：
正常使用 make qemu 启动系统，即有概率出现这个错误，大约是1/5到1/10的概率，但是用UEFI启动(make qemu-uefi)暂时没遇到这个问题
屏幕截图
系统日志
serial_opt.txt
使用正常方式调用time.h中的usleep函数
usleep(500000)
出现错误，但是休眠功能完好，确实暂停了
#include<libc/stdio.h>
#include<libc/time.h>
int main(){
usleep(500000);
printf("HelloStop!\n");
return 0;
}sudo apt install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev \
gawk build-essential bison flex texinfo gperf libtool patchutils bc \
zlib1g-dev libexpat-dev pkg-config libglib2.0-dev libpixman-1-dev libsdl2-dev \
git tmux python3 python3-pip ninja-build描述错误
当系统未安装unzip时会出错
重现步骤
重现行为的步骤：
user/apps/test_sqlite3时需要解压压缩包，如果没安装unzip就会重复下载压缩包期望行为
解压压缩包，接着编译
描述错误
当qemu内存设置为2G时，ACPI模块无法获取old rsdp信息，卡在multiboot2模块内，一直循环出不来.
卡住时，使用make gdb命令，然后在gdb输入backtrace命令，能够看到下面的调用栈：
请填写您的电脑的信息：
重现步骤
重现行为的步骤：
512M改为1Gmake run-vnc就会系统起来之后，卡住在Initializing ACPI...，并且按照上方的步骤，使用gdb能够看到调用栈。用gdb多次重复continue、暂停，发现持续卡在获取相关结构的地方。
如果把kernel/Cargo.toml里面的debug = false改为debug = true，系统则能正常启动。
期望行为
系统能正常运行
屏幕截图
其他上下文
在此处添加有关问题的任何其他上下文。
系统日志
uart init
Video driver to map.
Video driver initialized.
textui_install_handler
textui_enable_handler
textui_enable_handler
text ui initialized
[ INFO ] Kernel Starting...
[ DEBUG ] (main.c:82) _stack_start=0xffff800000320000
mm_init
mm_init() called
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:269) NO_EXECUTE_ENABLE is false, set XD_RESERVED to true
init_memory_area_from_multiboot2 begin
init_memory_area_from_multiboot2 2
init_memory_area_from_multiboot2 end
[ INFO ] (src/arch/x86_64/mm/mod.rs:259) Total memory size: 2047 MB, total areas from multiboot2: 9, valid areas: 2
x86 64 init end
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:309) bootstrap info: Some(kernel_code_start: ffff800000140000, kernel_code_end: ffff800000178be4, kernel_data_end: ffff8000002c2700, kernel_rodata_end: ffff800000317d0e, start_brk: ffff8000003624b8)
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:310) phys[0]=virt[0xffff800000000000]
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:327) PhysArea[0..10] = [PhysMemoryArea { base: PhysAddr(0x0), size: 654336 }, PhysMemoryArea { base: PhysAddr(0x100000), size: 2146299904 }, PhysMemoryArea { base: PhysAddr(0x0), size: 0 }, PhysMemoryArea { base: PhysAddr(0x0), size: 0 }, PhysMemoryArea { base: PhysAddr(0x0), size: 0 }, PhysMemoryArea { base: PhysAddr(0x0), size: 0 }, PhysMemoryArea { base: PhysAddr(0x0), size: 0 }, PhysMemoryArea { base: PhysAddr(0x0), size: 0 }, PhysMemoryArea { base: PhysAddr(0x0), size: 0 }, PhysMemoryArea { base: PhysAddr(0x0), size: 0 }]
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:330) BumpAllocator created, offset=3551232
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:351) PageMapper created
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:363) Successfully emptied page table
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:387) After mapping all physical memory, DragonOS used: 7652 KB
[ DEBUG ] (src/mm/allocator/buddy.rs:78) Free pages before init buddy: PageFrameCount(522342)
[ DEBUG ] (src/mm/allocator/buddy.rs:79) Buddy entries: 510
[ DEBUG ] (src/mm/allocator/buddy.rs:121) pages_to_buddy PageFrameCount(522323)
[ INFO ] (src/arch/x86_64/mm/mod.rs:397) Successfully initialized buddy allocator
textui_disable_handler
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:406) To enable new page table.
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:416) New page table enabled
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:418) Successfully enabled new page table
[ INFO ] Re-mapping VBE frame buffer...
[ INFO ] VBE frame buffer successfully Re-mapped!
textui_enable_handler
[ DEBUG ] (src/arch/x86_64/mm/mod.rs:428) Text UI enabled
[ DEBUG ] (src/mm/mmio_buddy.rs:618) Initializing MMIO buddy memory pool...
[ DEBUG ] (src/mm/mmio_buddy.rs:70) MMIO buddy pool init: created
[ DEBUG ] (src/mm/mmio_buddy.rs:74) total 1G blocks: 1024
[ DEBUG ] (src/mm/mmio_buddy.rs:86) MMIO buddy pool init success
[ INFO ] (src/mm/mmio_buddy.rs:624) MMIO buddy memory pool init done
[ INFO ] Initializing ACPI...
在根目录下
mkdir a
cd a
touch a.c
free
命令后内核崩溃
error code 0x0
rsp px6ffff09ffce8
rip 0x801094
cpu=0
pid=1
fault in userland
运行DragonOS
在运行DragonOS之前，需要先使用tools目录下的脚本，创建一至少为16MB磁盘镜像（类型选择raw）。并建立MBR分区表，然后将第一个分区格式化为FAT32分区。
这步不知道怎么操了
在真机上，尽管安装了msata磁盘，且设置BIOS为AHCI模式，但是pci的capability list中检测不到ahci控制器
由于之前的内存管理模块是C写的，并且代码比较emm难以描述的丑，以及没有考虑到处理器架构可移植性的问题，因此我们从4月开始对它进行重构。
重构的代码在patch-refactor-mm分支。可以在代码搜索引擎中查看：https://opengrok.ringotek.cn/xref/DragonOS-patch-refactor-mm/
内存管理重构目前已经接近尾声，主要是在调试各种bug.
| 内容 | 开发 | 测试 | 合并dev分支 | 负责人 |
|---|---|---|---|---|
| bump分配器 | ✅ | ✅ | ✅ | @kkkkkong mailto: [email protected] |
| buddy分配器 | ✅ | ✅ | ✅ | @kkkkkong mailto: [email protected] @fslongjin mailto: [email protected] |
| slab分配器 | ✅ | @kkkkkong mailto: [email protected] | ||
| 硬件抽象层 | ✅ | ✅ | ✅ | @fslongjin mailto: [email protected] |
| 内核空间映射管理 | ✅ | ✅ | ✅ | @fslongjin mailto: [email protected] |
| 用户空间映射管理 | ✅ | ✅ | ✅ | @fslongjin mailto: [email protected] |
| 系统调用层 | ✅ | ✅ | ✅ | @fslongjin mailto: [email protected] |
| 新的二进制程序加载器 | ✅ | ✅ | ✅ | @fslongjin mailto: [email protected] |
| C兼容层 | ✅ | ✅ | ✅ | @fslongjin mailto: [email protected] |
描述错误
进程被kill后，如果它监听了网络端口，相关的socket没有被释放。
请填写您的电脑的信息：
重现步骤
重现行为的步骤：
http_server &bind failed: Address already in use期望行为
第二次运行能够正常启动http_server
屏幕截图
Hi，看了下这个repo感觉十分感兴趣，但是自己对于操作系统方面的知识比较匮乏，想问下如何共享代码
描述错误
我使用vscode阅读代码，发现在文件transport_pci.rs中报错了
具体内容如下
warning: field `bus_device_function` is never read
--> src/driver/virtio/transport_pci.rs:80:5
|
77 | pub struct PciTransport {
| ------------ field in this struct
...
80 | bus_device_function: BusDeviceFunction,
| ^^^^^^^^^^^^^^^^^^^
|
= note: `PciTransport` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
= note: `#[warn(dead_code)]` on by default
请填写您的电脑的信息：
修复方法
我觉得把bus_device_function重命名为_bus_device_function能解决这个问题
描述错误
通过pipe命令执行 cmd_test中的 shell_pipe_test方法时产生错误 ，图一在等待子进程退出的过程中，在调用wait4方法时出错，图二还未确定具体错误发生地点
请填写您的电脑的信息：
重现步骤
make run之后在命令行执行pipe指令
期望行为
应当在输出 parent exist 和 child exist 后退出
屏幕截图
描述错误
显示大约18907（serial_opt.txt的长度）个字符时就会崩溃，在这之后系统的stdout就会出错，无法输出字符(包括'\b')
但是shell中添加的光标是可以显示的(光标用的是put_string)，但因为此错误导致无法输出'\b'(printf)，所以无法清除上一个光标
请填写您的电脑的信息：
dadk --version获取]rustc --version获取]重现步骤
重现行为的步骤：
期望行为
正常输出字符
系统日志
在进入shell后无任何报错
把acpi驱动程序里面，mmio用到的虚拟地址空间，改为使用mmio地址空间自动分配机制来获取
如题所述。
Forgive me for typing this in English, due to missing Chinese input method in my development environment for OS :(
I remembered once a comrade in qq group has mentioned that crash would happened when pressing random times of enter key.
This might be a certain way to reappear it, effective whenever kernel initializing program is running or user land program has successfully booted.
Whole serial port output is pasted here:
uart init
Video driver initialized.
textui_install_handlertextui_enable_handler
text ui initialized
[ INFO ] Kernel Starting...
[ DEBUG ] (main.c:79) _stack_start=0xffff800000278000
[ INFO ] Initializing memory management unit...
[ INFO ] Total amounts of RAM : 4580352 bytes
[ INFO ] Total amounts of 2M pages : 254.
[ INFO ] Memory management unit initialize complete!
[ INFO ] Initializing SLAB...
[ INFO ] SLAB initialized successfully!
[ INFO ] Re-Initializing page table...
[ INFO ] Page table Initialized. Affects:254
[ INFO ] mmio_init success
[ INFO ] Re-mapping VBE frame buffer...
[ INFO ] VBE frame buffer successfully Re-mapped!
[ INFO ] Initializing ACPI...
[ DEBUG ] (acpi.c:196) rsdpv1->RsdtAddress=0x000000001ffe196e
[ DEBUG ] (acpi.c:207) RSDT mapped!
RSDT Length=52bytes.
RSDT Entry num=4
[ INFO ] ACPI module initialized!
[ DEBUG ] (src/sched/rt.rs:28) rt scheduler init
[ DEBUG ] (apic/apic.c:374) 8259A Masked.
[ DEBUG ] (apic/apic.c:290) This computer support APIC&xAPIC
[ DEBUG ] (apic/apic.c:304) This computer support x2APIC
[ INFO ] xAPIC & x2APIC enabled!
[ INFO ] APIC Software Enabled.
[ DEBUG ] (apic/apic.c:240) local APIC Version:0x00000014,Max LVT Entry:0x00000006,SVR(Suppress EOI Broadcast):0x00
[ DEBUG ] (apic/apic.c:246) Integrated APIC.
[ DEBUG ] (apic/apic.c:266) All LVT Masked
[ DEBUG ] (apic/apic.c:104) IO APIC Version=17, Max Redirection Entries=24
[ WARN ] Cannot get RCBA address. RCBA_phys=0xffffffff
[ INFO ] Initializing syscall...
[ DEBUG ] (timer.c:32) timer func initialized.
[ DEBUG ] (smp.c:57) total_processor_num=2
[ DEBUG ] (smp.c:68) [core 0] acpi processor UID=0, APIC ID=0, flags=0x00000001
[ DEBUG ] (smp.c:68) [core 1] acpi processor UID=1, APIC ID=1, flags=0x00000001
[ SUCCESS ] AP core 1 successfully started!
[ INFO ] [ INFO ] Initializing AP-core's local apic...Cleaning page table remapping...
[ INFO ] [ DEBUG ] (smp.c:139) xAPIC & x2APIC enabled!
init proc's preempt_count=0[ INFO ]
APIC Software Enabled.[ INFO ] Successfully cleaned page table remapping!
[ DEBUG ] (apic/apic.c:240) [ INFO ] ProcFS mounted.
local APIC Version:0x00000014,Max LVT Entry:0x00000006,SVR(Suppress EOI Broadcast):0x00 [ INFO ] DevFS mounted.
[ INFO ] Successfully initialized VFS!
[ DEBUG ] (apic/apic.c:246) [ INFO ] CPU manufacturer: GenuineIntel
Integrated APIC.[ INFO ] CPU Brand Name: Intel Xeon E3-12xx v2 (Ivy Bridge)
[ DEBUG ] (apic/apic.c:266) [ INFO ] All LVT MaskedFamily ID=0x6 Extended Family ID=0x0 Processor Type=0x0
[ INFO ] Model ID=0xa Extended Model ID=0x3 Stepping ID=0x9
[ INFO ] Cpu_max_phys_addrline_size = 40
[ INFO ] Cpu_max_linear_addrline_size = 48
[ INFO ] Max basic mop=0x014
[ INFO ] Max extended mop=0x8000000a
[ INFO ] ps/2 keyboard registered.
[ INFO ] Initializing PCI bus...
[ INFO ] Checking all devices in PCI bus...
[ INFO ] Total pci device and function num = 5
[ INFO ] [ pci device 0 ] class code = 6 subclass=0 status=0x00000000
[ INFO ] [ pci device 1 ] class code = 12 subclass=3 status=0x00000010 cap_pointer=0x00000090 bar5=0x00000000, vendor=0x001b36, device id=0x00000d
[ INFO ] [ pci device 2 ] class code = 1 subclass=6 status=0x00000010 cap_pointer=0x00000080 bar5=0xfeb95000, vendor=0x008086, device id=0x002922
[ INFO ] [ pci device 3 ] class code = 2 subclass=0 status=0x00000010 cap_pointer=0x00000084 bar5=0x00000000, vendor=0x001af4, device id=0x001000
[ INFO ] [ pci device 4 ] class code = 3 subclass=0 status=0x00000000
[ INFO ] PCI bus initialized.
[ INFO ] Initializing HPET...
[ DEBUG ] (HPET/HPET.c:272) hpet_table->address=0x00000000fed00000
[ DEBUG ] (HPET/HPET.c:274) HPET_REG_BASE=0xffffa000fed00000
[ DEBUG ] (HPET/HPET.c:283) HPET_COUNTER_CLK_PERIOD=0x0000000000989680
[ INFO ] Total HPET timers: 2
[ INFO ] HPET driver Initialized.
[ INFO ] Measuring local APIC timer's frequency...
[ INFO ] Local APIC timer's freq: 329797 ticks/ms.
[ INFO ] TSC frequency: 2826MHz
[ INFO ] Initializing process...
[ DEBUG ] (process.c:708) Initial process to init files
[ DEBUG ] (process.c:710) Initial process init files ok
[ INFO ] Initializing kthread mechanism...
[ INFO ] HPET0 enabled.
[ INFO ] Initializing apic timer for cpu 0
[ INFO ] Initializing apic timer for cpu 1(test_timer)
[ INFO ] kthread daemon started![ INFO ]
initial proc running... arg:0x000000000000000a, vruntime=0
##init double buffer##
##to change double buffer##
[ DEBUG ] (src/exception/softirq.rs:228) SOftirq: unregister 1
[ DEBUG ] (src/exception/softirq.rs:228) SOftirq: unregister 1
##initialized double buffer##
[ INFO ] Initializing AHCI...
[ DEBUG ] (pci.c:492) [2] class_code=1, sub_class=6, progIF=1, bar5=0xfeb95000
[ INFO ] ABAR mapped!
[ DEBUG ] (src/driver/disk/ahci/mod.rs:106) <ahci_rust_init> Find a SATA type Disk.
[ DEBUG ] (src/driver/disk/ahci/mod.rs:136) start register ahci device
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
[ DEBUG ] (src/driver/disk/ahci/mod.rs:100) <ahci_rust_init> Find a None type Disk.
[ INFO ] Try to mount FAT32 as root fs...
[ INFO ] VFS: Migrating filesystems...
[ INFO ] VFS: Migrate filesystems done!
[ INFO ] Successfully migrate rootfs to FAT32!
[ DEBUG ] (pci.c:492) [3] class_code=2, sub_class=0, progIF=0, bar5=0x00000000
[ DEBUG ] (src/driver/pci/pci.rs:438) pci_device_bar:
Bar0:I/O space at 0x0000c020, size 32
Bar1:Unused bar
Bar2:Unused bar
Bar3:Unused bar
Bar4:Memory space at 0xfe000000, size 16384, type Width64, prefetchable true,mapped at 0xffffa1ffffbfc000
Bar5:Unused bar
[ DEBUG ] (src/driver/virtio/virtio.rs:22) Detected virtio PCI device with device type Network, features 0x0000000130bf8024
[ DEBUG ] (src/driver/virtio/virtio.rs:85) Virtio-net driver init successfully.
[ DEBUG ] (src/driver/virtio/virtio.rs:101) Virtio-net can send
[ DEBUG ] (src/driver/virtio/virtio.rs:120) virtio_net send success
[ DEBUG ] (src/driver/virtio/virtio.rs:129) virtio_net MAC=[82, 84, 0, 18, 52, 86]
[ DEBUG ] (src/driver/virtio/virtio.rs:130) virtio-net test finished
[ INFO ] LZ4 lib Version=1.9.3
__rust_demo_func()
[ DEBUG ] (process.c:593) in initial_kernel_thread: flags=4
____ ___ ____
| _ \ _ __ __ _ __ _ ___ _ __ / _ \ / ___|
| | | || '__| / _` | / _` | / _ \ | '_ \ | | | |\___ \
| |_| || | | (_| || (_| || (_) || | | || |_| | ___) |
|____/ |_| \__,_| \__, | \___/ |_| |_| \___/ |____/
|___/
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # �
[DragonOS] / # � �[ ERROR ] do_page_fault(14),Error code :0x0000000000000004,RSP:0x00006ffff09ffd00, RBP=0x00006ffff09ffd28, RIP:0x0000000000803fde CPU:0, pid=1
[ ERROR ] regs->rax = 0x0000000000801a63
Page Not-Present, Read Cause Fault, Fault in user(3)
CR2:0x0000000000000000
Kernel traceback: Fault in userland. pid=1, rbp=0x00006ffff09ffd28
Wish you good luck for debugging~
bug: 在物理机上，uart驱动程序卡死的问题。当发送数据时，会一直在等待上一次uart传输结束。（尽管可能没有上一次传输）
delete键会产生空格
左右键不会移动光标，而是输出字符KM
tab键进四格，但是退格只能退一格
D语言的 betterC 模式可比 C 语言更安全。
https://dlang.org/
https://dlang.org/spec/betterc.html
https://dlang.org/blog/2017/08/23/d-as-a-better-c/
https://github.com/dlang-community/awesome-d#os
D cookbook 有 Chapter 11: D for Kernel Coding https://weread.qq.com/web/bookDetail/f8e3262072301256f8e0856
内存管理：内核开启O0优化时，在fork或者进程退出时，可能出现vma相关的空指针异常
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
Django
The Web framework for perfectionists with deadlines.
Laravel
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft
Open source projects and samples from Microsoft.
Google
Google ❤️ Open Source for everyone.
Alibaba
Alibaba Open Source for everyone
D3
Data-Driven Documents codes.
Tencent
China tencent open source team.