I get the following panic when connecting via WiFi to an RPI-B running the r301815 snapshot: Fatal kernel mode data abort: 'Alignment Fault' on read trapframe: 0xc18f28c0 FSR=00000001, FAR=c21a287a, spsr=60000013 r0 =c07a6548, r1 =00000004, r2 =c060513d, r3 =000007b6 r4 =c18f2a28, r5 =c18f2b40, r6 =c21a2876, r7 =c1cce3e0 r8 =c1cce3e0, r9 =c21a2876, r10=c18f2b40, r11=c18f2988 r12=00000000, ssp=c18f2950, slr=c1a48370, pc =c0449928 Suggestions on where to start to track this down? Here's the console output over the serial port from boot to panic: U-Boot 2016.01 (Jun 11 2016 - 12:28:01 +0000) DRAM: 224 MiB RPI Model B (no P5) (0x3) MMC: bcm2835_sdhci: 0 reading uboot.env ** Unable to read "uboot.env" from mmc0:1 ** Using default environment In: serial Out: lcd Err: lcd Net: Net Initialization Skipped No ethernet found. reading uEnv.txt ** Unable to read file uEnv.txt ** Hit any key to stop autoboot: 0 starting USB... USB0: Core Release: 2.80a scanning bus 0 for devices... 4 USB Device(s) found scanning usb for storage devices... 0 Storage Device(s) found scanning usb for ethernet devices... 1 Ethernet Device(s) found Booting from: mmc 0 ubldr.bin reading ubldr.bin 223912 bytes read in 30 ms (7.1 MiB/s) ## No elf image at address 0x00200000 ## Starting application at 0x00200000 ... Consoles: U-Boot console Compatible U-Boot API signature found _at_0xdb464d0 FreeBSD/armv6 U-Boot loader, Revision 1.2 (root_at_releng2.nyi.freebsd.org, Sat Jun 11 12:55:20 UTC 2016) DRAM: 224MB Number of U-Boot devices: 2 U-Boot env: loaderdev='mmc 0' Found U-Boot device: disk Checking unit=0 slice=<auto> partition=<auto>... good. Booting from disk0s2a: /boot/kernel/kernel data=0x606164+0xfde9c syms=[0x4+0xcaf70+0x4+0x984e7] Hit [Enter] to boot immediately, or any other key for command prompt. Booting [/boot/kernel/kernel]... Using DTB provided by U-Boot at address 0x100. Kernel entry at 0x0x400100... Kernel args: (null) KDB: debugger backends: ddb KDB: current backend: ddb Copyright (c) 1992-2016 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 11.0-ALPHA3 #0 r301815: Sat Jun 11 13:02:45 UTC 2016 root_at_releng2.nyi.freebsd.org:/usr/obj/arm.armv6/usr/src/sys/RPI-B arm FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on LLVM 3.8.0) VT: init without driver. sema_sysinit CPU: ARM1176JZ-S rev 7 (ARM11J core) Supported features: ARM_ISA THUMB2 JAZELLE ARMv4 Security_Ext WB enabled LABT branch prediction disabled 16KB/32B 4-way instruction cache 16KB/32B 4-way write-back-locking-C data cache real memory = 234876928 (223 MB) avail memory = 219312128simplebus0: <Flattened device tree simple bus> mem 0x20000000-0x20ffffff on ofwbus0 cpulist0: <Open Firmware CPU Group> on ofwbus0 cpu0: <Open Firmware CPU> on cpulist0 bcm2835_cpufreq0: <CPU Frequency Control> on cpu0 intc0: <BCM2835 Interrupt Controllvent timer "BCM2835-3" frequency 1000000 Hz quality 1000 Timecounter "BCM2835-3" frequency 1000000 Hz quality 1000 bcmwd0: <BCM2708/2835 Watchdog> mem 0x10001c-0x100027 on simplebus0 gpio0: <BCM2708/2835 GPIO controller> mem 0x200000-0x2000af on simplebus0 gpio0: read-only pins: 46-53. gpio0: reserved pins: 48-53. gpiobus0: <OFW GPIO bus> on gpio0 gpioled0: <GPIO led> at pin 16 on gpiobus0 gpioc0: <GPIO controller> on gpio0 iichb0: <BCM2708/2835 BSC controller> mem 0x205000-0x20501f on simplebus0 iicbus0: <OFW I2C bus> on iichb0 iic0: <I2C generic I/O> on iicbus0 iichb1: <BCM2708/2835 BSC controller> mem 0x804000-0x80401f on simplebus0 iicbus1: <OFW I2C bus> on iichb1 iic1: <I2C generic I/O> on iicbus1 spi0: <BCM2708/2835 SPI controller> mem 0x204000-0x20401f on simplebus0 spibus0: <OFW SPI bus> on spi0 bcm_dma0: <BCM2835 DMA Controller> mem 0x7000-0x7fff,0xe05000-0xe05fff on simplebus0 mbox0: <BCM2835 VideoCore Mailbox> mem 0xb880-0xb8bf on simplebus0 sdhci_bcm0: <Broadcom 2708 SDHCI controller> mem 0x300000-0x3000ff on simplebus0 mmc0: <MMC/SD bus> on sdhci_bcm0 uart0: <PrimeCell UART (PL011)> mem 0x201000-0x201fff on simplebus0 uart0: console (115200,n,8,1) vchiq0: <BCM2835 VCHIQ> mem 0xb800-0xb84f on simplebus0 vchiq: local ver 8 (min 3), remote ver 8. pcm0: <VCHIQ audio> on vchiq0 bcm283x_dwcotg0: <DWC OTG 2.0 integrated USB controller (bcm283x)> mem 0x980000-0x99ffff on simplebus0 usbus0 on bcm283x_dwcotg0 fb0: <BCM2835 VT framebuffer driver> on ofwbus0 fbd0 on fb0 VT: initialize with new VT driver "fb". fb0: 656x416(656x416_at_0,0) 24bpp fb0: fbswap: 1, pitch 1968, base 0x0eaac000, screen_size 818688 cryptosoft0: <software crypto> Timecounters tick every 10.000 msec usbus0: 480Mbps High Speed USB v2.0 bcm2835_cpufreq0: ARM 700MHz, Core 250MHz, SDRAM 400MHz, Turbo OFF ugen0.1: <DWCOTG> at usbus0 uhub0: <DWCOTG OTG Root HUB, class 9/0, rev 2.00/1.00,uhub0: 1 port with 1 removable, self powered mmcsd0: 2GB <SD SD02G 2.8 SN A313612D MFG 02/2008 by 2 TM> at mmc0 41.6MHz/4bit/65535-block Trying to mount root from ufs:/dev/ufs/rootfs [rw]... warning: no time-of-day clock registered, system time will not be set accurately ugen0.2: <vendor 0x0424> at usbus0 uhub1: <vendor 0x0424 product 0x9512, class 9/0, rev 2.00/2.00, addr 2> on usbus0 uhub1: MTT enabled uhub1: 3 ports with 2 removable, self powered Setting hostuuid: 4af361f9-2fd5-11e6-bfe7-b827ebdc1f36. Setting hostid: 0xe2d1bb69. No suitable dump device was found. Starting file system checks: ugen0.3: <vendor 0x0424> at usbus0 smsc0: <vendor 0x0424 product 0xec00, rev 2.00/2.00, addr 3> on usbus0 smsc0: chip 0xec00, rev. 0002 miibus0: <MII bus> on smsc0 ukphy0: <Generic IEEE 802.3u media interface> PHY 1 on miibus0 ukphy0: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto ue0: <USB Ethernet> on smsc0 ue0: Ethernet address: b8:27:eb:dc/dev/ufs/rootfs: FILE SYSTEM CLEAN; SKIPPING CHECKS /dev/ufs/rootfs: clean, 276308 free (196 frags, 34514 blocks, 0.0% fragmentation) ugen0.4: <vendor 0x0bda> at usbus0 Mounting local filesystems:. ELF ldconfig path: /lib /usr/lib /usr/lib/compat random: unblocking device. Soft Float compatibility ldconfig path: Setting hostname: rpi-b. Setting up harvesting: [UMA],[FS_ATIME],SWI,INTERRUPT,NET_NG,NET_ETHER,NET_TUN,MOUSE,KEYBOARD,ATTACH,CACHED Feeding entropy: . ifconfig: SIOCIFCREATE2: Invalid argument smsc0: chip 0xec00, rev. 0002 ue0: link state changed to DOWN Starting Network: lo0 ue0. lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384 options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6> inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 inet 127.0.0.1 netmask 0xff000000 groups: lo nd6 optioue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=80009<RXCSUM,VLAN_MTU,LINKSTATE> ether b8:27:eb:dc:1f:36 media: Ethernet autoselect (none) status: no carrier nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> Starting devd. urtwn0: <vendor 0x0bda product 0x8176, class 0/0, rev 2.00/2.00, addr 4> on usbus0 urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R urtwn0: enabling 11n wlan0: Ethernet address: 00:13:ef:74:07:a8 Created wlan(4) interfaces: wlan0. Starting wpa_supplicant. Starting Network: wlan0. wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 ether 00:13:ef:74:07:a8 groups: wlan ssid "" channel 1 (2412 MHz 11b) regdomain FCC country CA indoor authmode WPA1+WPA2/802.11i privacy MIXED deftxkey UNDEF txpower 30 bmiss 7 scanvalid 60 wme roaming MANUAL bintval 0 media: IEEE 802.11 Wireless Ethernet autoselect (autoselect) status: no carrier nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> add host 127.0.0.1: gateway lo0 fib 0: route already in table add host ::1: gateway lo0 fib 0: route already in table add net fe80::: gateway ::1 add net ff02::: gateway ::1 add net ::ffff:0.0.0.0: gateway ::1 add net ::0.0.0.0: gateway ::1 Waiting 30s for the default route interface: wlan0: link state changed to UP .....(wlan0) Creating and/or trimming log files. Starting syslogd. Clearing /tmp (X related). Updating motd:. Mounting late filesystems:. Configuring vt: blanktime. Performing sanity check on sshd configuration. Starting sshd. Starting cron. Starting background file system checks in 60 seconds. Sat Jun 11 13:16:12 UTC 2016 FreeBSD/arm (rpi-b) (ttyu0) login: ["nc rpi-b 22" entered on remote] Fatal kernel mode data abort: 'Alignment Fault' on read trapframe: 0xc18f28c0 FSR=00000001, FAR=c21a287a, spsr=60000013 r0 =c07a6548, r1 =00000004, r2 =c060513d, r3 =000007b6 r4 =c18f2a28, r5 =c18f2b40, r6 =c21a2876, r7 =c1cce3e0 r8 =c1cce3e0, r9 =c21a2876, r10=c18f2b40, r11=c18f2988 r12=00000000, ssp=c18f2950, slr=c1a48370, pc =c0449928 [ thread pid 13 tid 100036 ] Stopped at $a.17+0x38: ldmib r6, {r1-r2} db> ...keithReceived on Thu Jun 16 2016 - 00:04:01 UTC
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