I am writing parallel LED board driver, .ko is successfully generated.
I am facing this issue
[63722.594233] led: Unknown symbol parport_register_device (err 0)
[63722.594264] led: Unknown symbol parport_register_driver (err 0)
parport_register_device is exported in drivers/parport/share.c. So you have to load parport driver first (modprobe parport) and then your driver.
Related
I want to create a program that logs a message when net_ns_net_exit function in the kernel is called.
SEC("fexit/net_ns_net_exit")
int BPF_PROG(net_ns_net_exit, struct net *net, long ret)
#endif
{
__u64 netns_inum = BPF_CORE_READ(net, ns.inum);
debugf("removing: netns_inum: %u", netns_inum);
return 0;
}
bpftool v7.0.0
using libbpf v1.0
features: libbfd, libbpf_strict, skeletons
I am building in on Ubuntu 22.04 with kernel 5.15.0-52-generic, AMD. The program works well on this machine, but when I try to run it on GCP with kernel version 5.10.133+ it fails with error:
libbpf: failed to find kernel BTF type ID of 'net_ns_net_exit': -3
libbpf: prog 'net_ns_net_exit': failed to prepare load attributes: -3
libbpf: prog 'net_ns_net_exit': failed to load: -3
libbpf: failed to load object 'remove_net_ns'
libbpf: failed to load BPF skeleton 'remove_net_ns': -3
loading remove_net_ns skeleton failed with error: -3
I've checked if vmlinux is available on machines and I found that both: GCP and my local ubuntu have: /sys/kernel/btf/vmlinux. I've checked the content(with vim) on the VM and I've noticed that my VM has net_ns_net_exit but GCP doesn't. I am not sure if it's related and how exactly make it works. Method: net_ns_net_exit was introduced to the kernel a long time ago so I've expected that it should be available. Maybe someone had this problem and has some advice or knows how to approach this issue?
The fexit hook points don't offer a stable API. So if the function you are trying to trace is inlined (as seems to be the case with your GCP kernel), then your only choice is to find another function that gives you the same information.
I am trying work with the demo of touchgfx designer with my stm32g071rb and the x-nucleo-gfx01m2.
The example project works fine if I flash it via TouchGFX designer.
When I import it in stm32cubeide, after setting up the external loader found in the touchgfx directory, i get the following error:
Erasing memory corresponding to segment 0:
Erasing internal memory sectors [0 34]
Erasing memory corresponding to segment 1:
Erasing external memory sector 0
Download in Progress:
File download complete
Time elapsed during download operation: 00:00:02.135
Verifying ...
Error: Data mismatch found at address 0x90000000 (byte = 0x00 instead of 0xD2)
Error: Download verification failed
Shutting down...
Exit.
I've also tried to use the stm32programmer but i get the same error.
How can i fix this?
Salesforce. Unable to Authorize org in VSCode.
SystemError: A system error occurred: uv_os_gethostname returned ENOSYS (function not implemented).
sfdx force:auth:web:login --setalias testorg --instanceurl https://login.salesforce.com --setdefaultusername
(node:3996) [ERR_SYSTEM_ERROR] SystemError Plugin: sfdx-cli [ERR_SYSTEM_ERROR]: A system error occurred: uv_os_gethostname returned ENOSYS (function not implemented)
module: #oclif/config#1.18.3
task: runHook init
plugin: sfdx-cli
root: C:\Program Files\sfdx\client
See more details with DEBUG=*
(Use node --trace-warnings ... to show where the warning was created)
SystemError: A system error occurred: uv_os_gethostname returned ENOSYS
(function not implemented)
Code: ERR_SYSTEM_ERROR
I have unistalled vs-code and re-istalled multiple times. Also uninstaled & re-imstalled sfdc cli as well. Any help is appreciated. Thanks
This issue happened due to the version of the windows operating system. It gives error in windows 7. It is working fine on higher versions.
I downloaded MATLAB from my college's WLAN and installed it on my Ubuntu 16.04 system. But when I run the command matlab in the terminal, I get the following error.
libGL error: pci id for fd 4: ffff:ffff, driver (null)
libGL error: No driver found
libGL error: failed to load driver: (null)
libGL error: pci id for fd 4: ffff:ffff, driver (null)
License checkout failed.
License Manager Error -15
MATLAB is unable to connect to the license server.
Check that the license manager has been started, and that the MATLAB client machine can communicate with the license server.
Diagnostic Information:
Feature: MATLAB
License path:/home/darshan/.matlab/R2015a_licenses:/usr/local/MATLAB/R2015a/licenses/license.dat:/usr/local/MATLAB/R2015a/licenses/network.lic
Licensing error: -15,570. System Error: 115
I tried the solution given in MATLAB not working on Ubuntu 16.04 but it did not work. How do I fix this error?
I figured out the mistake I had done during installation of Matlab. I had downloaded some file instead of the network.lic file from my college network. Replacing it with the correct network.lic file solved the problem.
I am trying to compile a driver for esxi that originally run under linux.
When i try to load it vmkload i get the following error/warning
WARNING: Elf: 1508: Relocation of symbol <pci_find_bus> failed: Unresolved symbol
Because It is not defined in the vmklinux9 - Which one should i use instead?
I just saw it is under ifdef at:
vmkdrivers/src_9/include/linux/pci.h
vmkdrivers/src_9/vmklinux_9/linux/pci/search.c
I get the interface by
pci_get_device_all
got the physical address with
pci_resource_start
And finnaly got the virual adderss with ioreamp