Add a Linux system call to Raspberry Pi

Lab 4: Add a system call to raspberry Pi

1. Download the compilation tool, the Kernel source file, and the Firmware.

$ Mkdir rpi
$ Cd rpi
$ Git clone git: // github.com/raspberrypi/firmware.git PRiFirmware
$ Git clone git: // github.com/raspberrypi/linux.git RpiLinux
$ Git clone git: // github.com/raspberrypi/tools.git RpiTools

The download takes a lot of time and requires network stability.

2. Obtain the. config file of the current Kernel and perform custom configuration.

The config.gz path is/proc/config.gz under rpi. Copy it to the root directory (RpiLinux) of the new kernel source code and run:

Sudo zcat config.gz>. config

Make ARCH = arm CROSS_COMPILE = ../RpiTools/arm-bcm2708/arm-bcm2708hardfp-linux-gnueabi/bin/arm-bcm2708hardfp-linux-gnueabi-oldconfig

Press enter to complete the configuration. NOTE: If compilation has been performed before, execute make mrproper to clean up and then execute the above two steps.

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