如何解决通过 uboot 启动时 linux 中的自动注销问题
我目前正在研究使用 uboot 启动 linux 的处理器。我编译了 linux 内核并将 vmlinux 转换为二进制文件，然后使用 mkimage 转换为 uImage。启动 linux 内核后，驱动程序和所有驱动程序都将被探测和初始化。我有登录提示，我登录后，当我按任意键时，它会返回到登录提示。我无法检查以太网和 spi 等驱动程序是否已初始化。
日志如下：
OpenSBI v0.9
____ _____ ____ _____
/ __ \ / ____| _ \_ _|
| | | |_ __ ___ _ __ | (___ | |_) || |
| | | | '_ \ / _ \ '_ \ \___ \| _ < | |
| |__| | |_) | __/ | | |____) | |_) || |_
\____/| .__/ \___|_| |_|_____/|____/_____|
| |
|_|
Platform Name : shakti,spike-bare
Platform Features : timer,mfdeleg
Platform HART Count : 1
Firmware Base : 0x80000000
Firmware Size : 108 KB
Runtime SBI Version : 0.3
Domain0 Name : root
Domain0 Boot HART : 0
Domain0 HARTs : 0*
Domain0 Region00 : 0x0000000080000000-0x000000008001ffff ()
Domain0 Region01 : 0x0000000000000000-0xffffffffffffffff (R,W,X)
Domain0 Next Address : 0x0000000080200000
Domain0 Next Arg1 : 0x0000000082200000
Domain0 Next Mode : S-mode
Domain0 SysReset : yes
Boot HART ID : 0
Boot HART Domain : root
Boot HART ISA : rv64imacnsu
Boot HART Features : scounteren,mcounteren,time
Boot HART PMP Count : 0
Boot HART PMP Granularity : 7919418773337001387
Boot HART PMP Address Bits: 213201012
Boot HART MHPM Count : 0
Boot HART MHPM Count : 0
Boot HART MIDELEG : 0x0000000000000222
Boot HART MEDELEG : 0x000000000000b109
MMC: [SHAKTI-INFO] Shakti SPI Driver Initialized...
spi@20100:mmc-slot@0: 0
In: uart
Out: uart
Err: uart
Net: No ethernet found.
Hit any key to stop autoboot: 0
Shakti U-Boot> run bootcmd
2852 bytes read in 518 ms (4.9 KiB/s)
15226112 bytes read in 1335400 ms (10.7 KiB/s)
## Booting kernel from Legacy Image at 84000000 ...
Image Name: Shakti-Vajra
Image Type: RISC-V Linux Kernel Image (uncompressed)
Data Size: 15226048 Bytes = 14.5 MiB
Load Address: 84000000
Entry Point: 84000040
Verifying Checksum ... OK
## Flattened Device Tree blob at 88000000
Booting using the fdt blob at 0x88000000
Loading Kernel Image
Using Device Tree in place at 0000000088000000,end 0000000088003b23
## Transferring control to kernel (at address 84000040) ...
Starting kernel ...
0 and 88000000
[ 0.000000] OF: fdt: Ignoring memory range 0x80000000 - 0x84000000
[ 0.000000] Linux version 5.5.0-rc1-00032-g264b43306b8c-dirty (venkatakrishnan@venkatakrishnan-ubuntu) (gcc version 10.2.0 (GCC)) #1 Wed Jul 14 12:55:55 IST 2021
[ 0.000000] initrd not found or empty - disabling initrd
[ 0.000000] Zone ranges:
[ 0.000000] DMA32 [mem 0x0000000084000000-0x000000008fffffff]
[ 0.000000] normal empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000084000000-0x000000008fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000084000000-0x000000008fffffff]
[ 0.000000] software IO TLB: mapped [mem 0x8bd5b000-0x8fd5b000] (64MB)
[ 0.000000] elf_hwcap is 0x1105
[ 0.000000] Built 1 zonelists,mobility grouping on. Total pages: 48480
[ 0.000000] Kernel command line: earlyprintk root=/dev/mmcblk1p2 rw rootwait rootfs=ext4 noinitrd selinux=0
[ 0.000000] Dentry cache hash table entries: 32768 (order: 6,262144 bytes,linear)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 5,131072 bytes,linear)
[ 0.000000] Sorting __ex_table...
[ 0.000000] mem auto-init: stack:off,heap alloc:off,heap free:off
[ 0.000000] Memory: 112684K/196608K available (3867K kernel code,201K rwdata,702K rodata,9856K init,232K bss,83924K reserved,0K cma-reserved)
[ 0.000000] SLUB: HWalign=64,Order=0-3,MinObjects=0,cpus=1,Nodes=1
[ 0.000000] NR_IRQS: 0,nr_irqs: 0,preallocated irqs: 0
[ 0.000000] plic: mapped 29 interrupts with 1 handlers for 2 contexts.
[ 0.000000] riscv_timer_init_dt: Registering clocksource cpuid [0] hartid [0]
[ 0.000000] clocksource: riscv_clocksource: mask: 0xffffffffffffffff max_cycles: 0x1ef4687b1,max_idle_ns: 112843571739654 ns
[ 0.001403] sched_clock: 64 bits at 32kHz,resolution 30517ns,wraps every 70368744171142ns
[ 6.036712] printk: console [hvc0] enabled
[ 6.188354] Calibrating delay loop (skipped),value calculated using timer frequency.. 0.06 BogoMIPS (lpj=131)
[ 6.546874] pid_max: default: 32768 minimum: 301
[ 6.774353] Mount-cache hash table entries: 512 (order: 0,4096 bytes,linear)
[ 6.988464] Mountpoint-cache hash table entries: 512 (order: 0,linear)
[ 7.661102] devtmpfs: initialized
[ 8.313964] random: get_random_bytes called from setup_net+0x54/0x1dc with crng_init=0
[ 8.598937] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff,max_idle_ns: 7645041785100000 ns
[ 8.905670] futex hash table entries: 256 (order: 0,6144 bytes,linear)
[ 9.231109] NET: Registered protocol family 16
[ 10.946990] clocksource: Switched to clocksource riscv_clocksource
[ 11.648681] NET: Registered protocol family 2
[ 11.954620] tcp_listen_portaddr_hash hash table entries: 256 (order: 0,linear)
[ 12.275756] TCP established hash table entries: 2048 (order: 2,16384 bytes,linear)
[ 12.574859] TCP bind hash table entries: 2048 (order: 2,linear)
[ 12.843292] TCP: Hash tables configured (established 2048 bind 2048)
[ 13.101928] UDP hash table entries: 256 (order: 1,8192 bytes,linear)
[ 13.341583] UDP-Lite hash table entries: 256 (order: 1,linear)
[ 13.651397] NET: Registered protocol family 1
[ 43.764770] workingset: timestamp_bits=62 max_order=15 bucket_order=0
[ 57.322448] ntfs: driver 2.1.32 [Flags: R/W DEBUG].
[ 57.828308] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
[ 58.104797] io scheduler mq-deadline registered
[ 58.249664] io scheduler kyber registered
[ 58.562072] io scheduler bfq registered
[ 80.824493] shakti_spi 20100.spi: Shakti SPI Driver initialized
[ 81.467407] libphy: Fixed Mdio Bus: probed
[ 81.641357] xilinx_emaclite 44000.ethernet: Device Tree Probing
[ 81.904205] libphy: Xilinx Emaclite Mdio: probed
[ 82.159179] xilinx_emaclite 44000.ethernet: MAC address is Now 00:0a:35:00:00:00
[ 82.676452] xilinx_emaclite 44000.ethernet: Xilinx EmacLite at 0x00044000 mapped to 0x04008000,irq=29
[ 83.295562] mmc_spi spi0.0: SD/MMC host mmc0,no DMA,no WP,no poweroff,cd polling
[ 83.743865] NET: Registered protocol family 17
[ 87.106170] Freeing unused kernel memory: 9856K
[ 87.250457] This architecture does not have kernel memory protection.
[ 87.505645] Run /init as init process
[ 87.939697] mmc0: host does not support reading read-only switch,assuming write-enable
[ 88.247863] mmc0: new SDHC card on SPI
[ 88.586975] mmcblk0: mmc0:0000 NCard 14.8 GiB
[ 89.673187] mmcblk0: p1 p2
Starting syslogd: OK
Starting klogd: OK
Running sysctl: OK
Starting mdev... OK
modprobe: can't change directory to '/lib/modules': No such file or directory
Saving random seed: [ 668.203765] random: dd: uninitialized urandom read (512 bytes read)
OK
Starting network plug daemon: /etc/netplug.d/netplug eth0 probe -> pid 68
[ 678.362823] xilinx_emaclite 44000.ethernet eth0: Link is Down
/etc/netplug.d/netplug eth1 probe -> pid 70
/etc/netplug.d/netplug eth2 probe -> pid 71
/etc/netplug.d/netplug eth3 probe -> pid 72
/etc/netplug.d/netplug eth4 probe -> pid 73
/etc/netplug.d/netplug eth5 probe -> pid 74
/etc/netplug.d/netplug eth6 probe -> pid 75
/etc/netplug.d/netplug eth7 probe -> pid 76
/etc/netplug.d/netplug eth8 probe -> pid 77
/etc/netplug.d/netplug eth9 probe -> pid 78
/etc/netplug.d/netplug eth10 probe -> pid 79
/etc/netplug.d/netplug eth11 probe -> pid 80
/etc/netplug.d/netplug eth12 probe -> pid 81
/etc/netplug.d/netplug eth13 probe -> pid 82
/etc/netplug.d/netplug eth14 probe -> pid 83
/etc/netplug.d/netplug eth15 probe -> pid 84
Starting network: OK
Starting dropbear sshd: [ 750.193481] random: dropbear: uninitialized urandom read (32 bytes read)
OK
Welcome to buildroot
buildroot login: root
Password:
#
#
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#
[ 1785.265594] sh[101]: unhandled signal 11 code 0x1 at 0x00000000656c6976 in busyBox[10000+aa000]
[ 1785.600006] cpu: 0 PID: 101 Comm: sh Not tainted 5.5.0-rc1-00032-g264b43306b8c-dirty #1
[ 1785.904663] epc: 000000000004e3f2 ra : 000000000004e3b8 sp : 0000003fffdf6920
[ 1786.169036] gp : 00000000000bbc90 tp : 0000003fc282b820 t0 : 0000000000000000
[ 1786.434844] t1 : 0000000000017e3c t2 : 0000003fc28158d8 s0 : 00000000000bd2a0
[ 1786.701660] s1 : 0000000000000000 a0 : 00000000000c1f10 a1 : 0000000000000000
[ 1786.967529] a2 : 0000000000000000 a3 : 0000000000000000 a4 : 00000000000bbe18
[ 1787.234069] a5 : 00000000656c6966 a6 : 0000000000000000 a7 : 0000000000000000
[ 1787.499847] s2 : 00000000000bbea0 s3 : 00000000000bd5e0 s4 : 0000000000000000
[ 1787.766418] s5 : 0000000000000000 s6 : ffffffffffffffff s7 : 000000000009a000
[ 1788.033386] s8 : 00000000000bd5e0 s9 : 0000000000090000 s10: 0000003fffdf6980
[ 1788.299255] s11: 0000000000000015 t3 : 0000003fc2778a54 t4 : 0000003fc27e45c0
[ 1788.565673] t5 : 0000000000000005 t6 : ffffffffffffffff
[ 1788.746154] status: 0000000200000020 badaddr: 00000000656c6976 cause: 000000000000000d
Welcome to buildroot
buildroot login:
由于我是初学者，因此无法找到此错误的问题。用于构建 BBL 的相同 vmlinux(ELF) 在通过 GDB 加载时工作正常。
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