simplest way to automate app running

[effbiae]

my motivation is to write apps that test baremetal functionality and to script testing. the first thing i want to do is automate testing of the newlib port

say i write calc.app that reads a line, computes the result and outputs the result.
in simplest terms, i'd like to
echo 1+1 | qemu -serial xxx -nographic calc.bin | grep 2

how do i

• make a simple image (using bmfs/dd) with Pure64 and BareMetal and only calc.app
  • is it just cat pure64 baremetal calc.app > calc.bin?
  • it looks a bit harder than that with uefi stuff to do when i look at the build scripts in BareMetal-OS
• call qemu with the right options to capture the output and provide input
  • i know it involves -serial -nographic
• terminate qemu when calc.app is done
  • is there a soft shutdown?
  • will a shutdown terminate qemu?
  • I just found "In newer versions of QEMU, you can do shutdown with: outw(0x604, 0x2000);" here

[IanSeyler]

This is possible by replacing BareMetal-Monitor. You won't get the graphical display in that case.

In baremetal.sh look for the baremetal_run function.

	# Serial configuration
	# Output serial to file
		-serial file:"sys/serial.log"
	# Output serial to console
	#	-chardev stdio,id=char0,logfile="sys/serial.log",signal=off
	#	-serial chardev:char0

You can change the output via the commenting the output to file line and uncommenting the output to console lines. You should see some output from the loader and kernel.

I'll look into -nographic as it's been a while since I've used it.

There is an API call for reboot and shutdown that works within QEMU.

Let me try to get a newib-based C program up and running. Then I can work on having it auto execute.

[IanSeyler]

A basic autorun program that outputs a string via serial and then shuts down:

https://github.com/IanSeyler/BareMetal-Autorun

This replaces BareMetal-Monitor so there is no GUI display.

[effbiae]

I see it has a different ORG to apps -- maybe for simplicity it would be best to keep monitor so we just have the one app layout?

I should be able to control monitor through stdio something like echo 1 | qemu -serial stdio ...

I've submitted a pull request so I can tell baremetal.sh to install my app to the BMFS file

[IanSeyler]

I could modify BareMetal-Monitor to automatically load and execute a program if there is only one present. Would that be workable?

[effbiae]

that's a good idea

[IanSeyler]

Done!