我正在尝试更新内核
这是我面临的问题。 内核引导参数是从Uboot传递的。 我看到内核在SyS_selec（）上崩溃。我认为此打印来自中断。内核日志消息并没有告诉我太多有关FPU的信息，即浮点单元。我不明白为什么说FPU，因为我没有做任何与浮点有关的事情。这是日志。您能帮助我了解根本原因以及在哪里解决此问题？
=> boot
## Booting kernel from Legacy Image at f8100000 ...
Image Name: Linux-4.12.28-disco-standard
Created: 2019-07-15 4:32:40 UTC
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 3804492 Bytes = 3.6 MiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at f8000000
Booting using the fdt blob at 0xf8000000
Uncompressing Kernel Image ... OK
Loading Device Tree to 007fb000, end 007ff8e8 ... OK
Linux version 4.12.28-disco-standard (oe-user@oe-host) (gcc version 7.3.0 (GCC) ) #1 Mon Jul 15 04:01:31 UTC 2019
Using abcl machine description
bootconsole [udbg0] enabled
-----------------------------------------------------
Hash_size = 0x0
phys_mem_size = 0x20000000
dcache_bsize = 0x20
icache_bsize = 0x20
cpu_features = 0x0000000000020460
possible = 0x0000000005a6fd77
always = 0x0000000000020000
cpu_user_features = 0x8c000000 0x00000000
mmu_features = 0x00210000
-----------------------------------------------------
abcl_setup_arch()
Zone ranges:
DMA [mem 0x0000000000000000-0x000000001fffffff]
Normal empty
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000000000000-0x000000001fffffff]
Initmem setup node 0 [mem 0x0000000000000000-0x000000001fffffff]
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048
Kernel command line: ubi.mtd=1 rootfstype=ubifs root=ubi0:discofs rw console=ttyS1,115200 serno=91101316 sku=700064090C hwrev==00:90:5E:12:32:05 mac1=00:90:5E:12:32:06 mac2=00:90:5E:12:32:07 mac3=00:90:5E:12:32:08 mac4=00:90:5E:12:32:09
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 511900K/524288K available (6004K kernel code, 276K rwdata, 1196K rodata, 192K init, 133K bss, 12388K reserved, 0K cma-reserved)
Kernel virtual memory layout:
* 0xfffdf000..0xfffff000 : fixmap
* 0xfdffe000..0xfe000000 : early ioremap
* 0xe1000000..0xfdffe000 : vmalloc & ioremap
NR_IRQS:512 nr_irqs:512 16
IPIC (128 IRQ sources) at e1000700
clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 0x12049cd416, max_idle_ns: 440795202745 ns
clocksource: timebase mult[ccccccd] shift[24] registered
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
devtmpfs: initialized
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
futex hash table entries: 256 (order: -1, 3072 bytes)
NET: Registered protocol family 16
PCI: Probing PCI hardware
Freescale Elo series DMA driver
vgaarb: loaded
SCSI subsystem initialized
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
clocksource: Switched to clocksource timebase
NET: Registered protocol family 2
TCP established hash table entries: 4096 (order: 2, 16384 bytes)
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
fsl-elo-dma e00082a8.dma: #0 (fsl,elo-dma-channel), irq 71
fsl-elo-dma e00082a8.dma: #1 (fsl,elo-dma-channel), irq 71
fsl-elo-dma e00082a8.dma: #2 (fsl,elo-dma-channel), irq 71
fsl-elo-dma e00082a8.dma: #3 (fsl,elo-dma-channel), irq 71
workingset: timestamp_bits=30 max_order=17 bucket_order=0
NFS: Registering the id_resolver key type
Key type id_resolver registered
Key type id_legacy registered
jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
SGI XFS with security attributes, no debug enabled
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0xe0004500 (irq = 16, base_baud = 19531250) is a 16550A
serial8250.0: ttyS1 at MMIO 0xe0004600 (irq = 17, base_baud = 19531250) is a 16550A
console [ttyS1] enabled
console [ttyS1] enabled
bootconsole [udbg0] disabled
bootconsole [udbg0] disabled
brd: module loaded
loop: module loaded
f8000000.flash: Found 1 x16 devices at 0x0 in 16-bit bank. Manufacturer ID 0x000089 Chip ID 0x008966
Intel/Sharp Extended Query Table at 0x010A
Intel/Sharp Extended Query Table at 0x010A
Intel/Sharp Extended Query Table at 0x010A
Intel/Sharp Extended Query Table at 0x010A
Intel/Sharp Extended Query Table at 0x010A
Using buffer write method
Using auto-unlock on power-up/resume
cfi_cmdset_0001: Erase suspend on write enabled
Searching for RedBoot partition table in f8000000.flash at offset 0x7fe0000
No RedBoot partition table detected in f8000000.flash
nand: device found, Manufacturer ID: 0x20, Chip ID: 0xd3
nand: ST Micro NAND08GW3B2CN6
nand: 1024 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
Bad block table found at page 524224, version 0x01
Bad block table found at page 524160, version 0x01
nand_read_bbt: bad block at 0x0000023a0000
nand_read_bbt: bad block at 0x0000369c0000
Searching for RedBoot partition table in c0000000.flash at offset 0x3ff60000
No RedBoot partition table detected in c0000000.flash
1 ofpart partitions found on MTD device c0000000.flash
Creating 1 MTD partitions on "c0000000.flash":
0x000000000000-0x000040000000 : "NAND Filesystem"
eLBC NAND device at 0xc0000000, bank 4
abcl nand: no system info node found, assuming legacy device tree blob.
libphy: Fixed MDIO Bus: probed
libphy: Freescale PowerQUICC MII Bus: probed
libphy: Freescale PowerQUICC MII Bus: probed
fsl-gianfar e0025000.ethernet: enabled errata workarounds, flags: 0x4
fsl-gianfar e0025000.ethernet eth0: mac: 00:90:5e:12:32:05
fsl-gianfar e0025000.ethernet eth0: Running with NAPI enabled
fsl-gianfar e0025000.ethernet eth0: RX BD ring size for Q[0]: 256
fsl-gianfar e0025000.ethernet eth0: TX BD ring size for Q[0]: 256
fsl-gianfar e0024000.ethernet: enabled errata workarounds, flags: 0x4
fsl-gianfar e0024000.ethernet eth1: mac: 00:90:5e:12:32:06
fsl-gianfar e0024000.ethernet eth1: Running with NAPI enabled
fsl-gianfar e0024000.ethernet eth1: RX BD ring size for Q[0]: 256
fsl-gianfar e0024000.ethernet eth1: TX BD ring size for Q[0]: 256
i2c /dev entries driver
mpc-i2c e0003000.i2c: timeout 1000000 us
rtc-ds1307: probe of 0-0068 failed with error -5
mpc-i2c e0003100.i2c: timeout 1000000 us
NET: Registered protocol family 17
NET: Registered protocol family 15
8021q: 802.1Q VLAN Support v1.8
Key type dns_resolver registered
ubi0: attaching mtd1
random: fast init done
ubi0: scanning is finished
ubi0 warning: ubi_eba_init: cannot reserve enough PEBs for bad PEB handling, reserved 108, need 154
ubi0: attached mtd1 (name "NAND Filesystem", size 1024 MiB)
ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 129024 bytes
ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 512
ubi0: VID header offset: 512 (aligned 512), data offset: 2048
ubi0: good PEBs: 8186, bad PEBs: 6, corrupted PEBs: 0
ubi0: user volume: 3, internal volumes: 1, max. volumes count: 128
ubi0: max/mean erase counter: 2/0, WL threshold: 4096, image sequence number: 2015956448
ubi0: available PEBs: 0, total reserved PEBs: 8186, PEBs reserved for bad PEB handling: 108
ubi0: background thread "ubi_bgt0d" started, PID 82
hctosys: unable to open rtc device (rtc0)
of_cfs_init
of_cfs_init: OK
md: Waiting for all devices to be available before autodetect
md: If you don't use raid, use raid=noautodetect
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
UBIFS (ubi0:0): background thread "ubifs_bgt0_0" started, PID 87
UBIFS (ubi0:0): recovery needed
UBIFS (ubi0:0): recovery completed
UBIFS (ubi0:0): UBIFS: mounted UBI device 0, volume 0, name "discofs"
UBIFS (ubi0:0): LEB size: 129024 bytes (126 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
UBIFS (ubi0:0): FS size: 198567936 bytes (189 MiB, 1539 LEBs), journal size 9033728 bytes (8 MiB, 71 LEBs)
UBIFS (ubi0:0): reserved for root: 0 bytes (0 KiB)
UBIFS (ubi0:0): media format: w4/r0 (latest is w5/r0), UUID C7F7CF25-F51C-4F98-878F-489AD5ECB0E4, small LPT model
VFS: Mounted root (ubifs filesystem) on device 0:13.
devtmpfs: mounted
Freeing unused kernel memory: 192K
This architecture does not have kernel memory protection.
Unable to handle kernel paging request for data at address 0x00005091
Faulting instruction address: 0xc0100eec
Oops: Kernel access of bad area, sig: 11 [#1]
abcl
Modules linked in:
CPU: 0 PID: 1 Comm: init Not tainted 4.12.28-disco-standard #1
task: df416a60 task.stack: df42a000
NIP: c0100eec LR: c01013a0 CTR: 00000000
REGS: df42be40 TRAP: 0300 Not tainted (4.12.28-disco-standard)
MSR: 00009032 <EE,ME,IR,DR,RI>
CR: 22002442 XER: 00000000
DAR: 00005091 DSISR: 20000000
GPR00: c0101350 df42bef0 df416a60 df42bef8 bfccbb94 00000000 00000000 00000000
GPR08: 00000000 00000000 00000000 00000000 00000000 10028254 00000000 00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000001
GPR24: bfcccf47 00000000 00000000 00000000 bfccbb08 0000000c bfccbb90 df42bef8
NIP [c0100eec] poll_select_set_timeout+0x0/0x174
LR [c01013a0] SyS_select+0x9c/0x114
Call Trace:
[df42bef0] [c0101350] SyS_select+0x4c/0x114 (unreliable)
[df42bf40] [c00103a8] ret_from_syscall+0x0/0x38
--- interrupt: c01 at 0xfef65b4
LR = 0xfef657c
Instruction dump:
28f5c8c2 57ff803e 87d89261 f55d3806 7d37c1cf eac5d8a5 24dbd73d 532e2514
e4b43b1b e77c9e25 cefebc5b 76ac3b5f <adba5091> 1d7f7395 3cfdc277 8d7c18a0
---[ end trace 0bfbbaf2a7935445 ]---
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
Rebooting in 180 seconds..
答案 0 :(得分：0)
您没有提到您使用哪种initramfs。您可以尝试在内核命令行选项中添加“ break = init”以查看是否获得了shell吗？