PROCESSOR-SDK-AM64X: How to generate a simple Hello world application

Himansu Sethi

Prodigy 150 points

Part Number: PROCESSOR-SDK-AM64X

I want to compile a simple application that just prints "Hello World" On Linux Kernel. How can I do so?

Thanks

Himansu

over 4 years ago

+1 Bin Liu over 4 years ago

TI__Guru**** 168291 points

Hi,

Is the "Hello World" application a Linux user space program or Kernel module?

0 Himansu Sethi over 4 years ago in reply to Bin Liu

Prodigy 150 points

I want to print on the kernel

+1 Bin Liu over 4 years ago in reply to Himansu Sethi

TI__Guru**** 168291 points

Hi,

You would have to write the kernel module, and print "Hello World" in the module init function. You can either build your kernel module in the kernel source tree, or outside of the kernel source tree. Please search it on the internet, there is plenty of tutorials teaching to write a simple kernel module.

0 Himansu Sethi over 4 years ago in reply to Bin Liu

Prodigy 150 points

Yes but what cross compiler do I need to use. When I compile with arm-linux-gnueabihf corss compiler its showing "Invalid Module format"

root@am64xx-evm:/test# insmod main.ko
insmod: ERROR: could not insert module main.ko: Invalid module format

0 Bin Liu over 4 years ago in reply to Himansu Sethi

TI__Guru**** 168291 points

AM64x is a 64bit processor, so you need to use aarch64-none-linux-gnu cross compiler instead. Please also ensure ARCH=arm64 is used, not ARCH=arm.

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PROCESSOR-SDK-AM64X: How to generate a simple Hello world application