Hi, I am experiencing a Kernel crash when moving my system from Yocto 2.3 (Pyro) to Rocko or Master. Target system is an ARMv7 (NXP Layerscape LS1021a, built on Cortex-A7). This is what I did: 1) switched poky version 2) re-built same image in a new, blank directory
Results: Root-FS works fine, the kernel crashes with an undefined instruction oops. Just exchanging the kernel zImage with the one compiled with Pyro (same recipe), my system works fine again. What I tried so far: 1) checked and compared the kernel configs generated: 100% identical 2) switched gcc back to the version used in Pyro (6.3) instead of 7.2: kernel still crashes, same oops, no changes. So it's not related to GCC 7.2 3) checked on different boards: same issue for the same board type, but the switch to rocko worked fine for a system based on Cortex-A9. I am using separate tmp directories and am not sharing sstate. I always started builds in blank build directories. The error is reproducible (100%) It was also present with all of the various snapshots of the master branch I tried What I suspect: there are some changes in the ways that gcc is called from pyro to rocko. Maybe one of the switches, or features, etc Before deep-diving into the trial and error phase of reproducing the CFLAGS, etc: Is anyone experiencing the same issues? * What exactly has changed in the way the kernel build is called (methods, compile/link flags, etc) between pyro and rocko? * * Is there a way to (easily) disable some of the features to test which one causes the issue? * * Any suspicions about what could cause this? * Pls. find a log of the crash below, and an excerpt of my kernel recipe and machine configuration. Thanks in advance for your help, Best regards, Michael ------------- VFS: Mounted root (ext4 filesystem) on device 179:1. devtmpfs: mounted Freeing unused kernel memory: 2048K Internal error: Oops - undefined instruction: 0 [#1] SMP THUMB2 Modules linked in: CPU: 1 PID: 1 Comm: init Not tainted 4.14.2-avnet-nxp #2 Hardware name: Freescale LS1021A task: bf0a0000 task.stack: bf09a000 PC is at ret_fast_syscall+0x2/0x52 LR is at SyS_brk+0x109/0x128 pc : [<80205fc2>] lr : [<802c513d>] psr: 60000013 sp : bf09bfa8 ip : 70c5387d fp : 00001000 r10: 00000000 r9 : bf09a000 r8 : 802061a4 r7 : 0000002d r6 : 76f71bac r5 : 00010034 r4 : 00000009 r3 : 000273c8 r2 : ffff0001 r1 : 00000000 r0 : 00028000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 70c5387d Table: be7d1000 DAC: fffbfff3 Process init (pid: 1, stack limit = 0xbf09a210) Stack: (0xbf09bfa8 to 0xbf09c000) bfa0: 00000009 00010034 00000000 7ee86fea 00000000 00000001 bfc0: 00000009 00010034 76f71bac 0000002d 00000000 00000001 00000001 00001000 bfe0: 7ee86f14 7ee86e4c 76f87a58 76f88e88 60000010 00000000 00000000 00000000 Code: 20012000 0000bd08 00000000 b6720000 (2008f8d9) ---[ end trace 7bab6dceda641aab ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU0: stopping CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D 4.14.2-avnet-nxp #2 Hardware name: Freescale LS1021A [<8020bbe9>] (unwind_backtrace) from [<80208e77>] (show_stack+0xb/0xc) [<80208e77>] (show_stack) from [<8066af19>] (dump_stack+0x69/0x78) [<8066af19>] (dump_stack) from [<8020b1d5>] (handle_IPI+0x261/0x274) [<8020b1d5>] (handle_IPI) from [<802012b1>] (gic_handle_irq+0x61/0x64) [<802012b1>] (gic_handle_irq) from [<8067d953>] (__irq_svc+0x53/0x7c) Exception stack(0x80e01f38 to 0x80e01f80) 1f20: 00000000 000027d0 1f40: 3eb79000 80212641 ffffe000 80e03cd0 80e03c74 80e7f3ab 8096e480 80e03c40 1f60: 80e8ce00 80c42a30 01400000 80e01f88 80206a3d 80206a3e 40000033 ffffffff [<8067d953>] (__irq_svc) from [<80206a3e>] (arch_cpu_idle+0x22/0x24) [<80206a3e>] (arch_cpu_idle) from [<802405bf>] (do_idle+0x9f/0xe4) [<802405bf>] (do_idle) from [<802407bb>] (cpu_startup_entry+0x13/0x14) [<802407bb>] (cpu_startup_entry) from [<80c00a05>] (start_kernel+0x305/0x310) ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ----------------------- Excerpt from linux_xxx.bb: ---- DEPENDS_kernel-base += "kernel-devicetree" LINUX_VERSION = "4.14-stable" S = "${WORKDIR}/git" PR = "r1" SRCREV = "8292fd8d726105abc01dae26d0a2cddcf53d4e0f" PV = "4.14.2" SRC_URI = " \ git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git;branch=master;protocol=git;nobranch=1 \ " SRC_URI_append_ls1021a = " file://defconfig " SRC_URI_append_ls1021a = " file://pcie.cfg file://caam.cfg file://usb.cfg file://bt.cfg " ---- Excerpt from machine.conf --- SOC_FAMILY = "ls1021a" TARGET_ARCH = "arm" DEFAULTTUNE = "cortexa7hf-neon-vfpv4" IMAGE_INSTALL_append = " kernel-modules kernel-devicetree kernel-image" KERNEL_IMAGETYPE = "zImage" KERNEL_EXTRA_ARGS += "LOADADDR=${UBOOT_ENTRYPOINT}" EXTRA_IMAGEDEPENDS += "virtual/bootloader" ---- -- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto