Questions tagged [uclinux]

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Blocking ports with iptables 1.4.2

I am trying to block some ports on an embeded uClinux· The Iptables version is 1.4.2. The command I used was iptables -I INPUT -p tcp --dport 22 -j DROP But it seems that iptables 1.4.2 is not ...
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Minimum ram we can achieve with Linux only blinking led

I heard of uclinux and Linux tiny project are very ambitious projects. It uses concept called XiP to reduce memory footprint. We can strip down binary and storage is less of a problem but connection ...
0
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1answer
879 views

uCLinux (linux 4.9 nommu) VFS: Cannot open root device “(null)”

I'm stuck with this kernel panic. What I want is to embed an initramfs into the kernel xip Image, but linux panic and tell me to pass a valid "root=" rootfs value. But WHY does Linux look for this ...
1
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1answer
62 views

Determing if an embedded Linux system runs uClinux

I have an ARM Linux system running kernel version 2.4, but I'm not sure if the processor has a memory-management unit, so how can I tell whether the system is running a uClinux kernel or a vanilla ...
4
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1answer
7k views

How to find processes using serial port

I'm using uclinux and I want to find out which processes are using the serial port. The problem is that I have no lsof or fuser. Is there any other way I can get this information?
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0answers
85 views

Add a driver module to embedded linux

I have a task that consists in implementing a driver for an RF module. The RF module communicate with the blackFin609 microcontroller using UART. In a first step i created a uClinux image and ...
3
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1answer
562 views

What is being cached?

I have an embedded system with a low amount of memory. The system has allocation issues. Maybe due to fragmentation: Memory allocation issue on NOMMU? The platform is a NOMMU platform and so I suspect ...
1
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0answers
397 views

Memory allocation issue on NOMMU?

I have a memory allocation issue on an embedded NOMMU linux. Or that is, I might have an issue, I'm not sure. The system has 15M free ram when booted. I have one small app (a Dropbox/REST ...