Add startup.nsh to QEMU drive

This reduces the amount of typing that we have to do. Now the UEFI application
automatically runs on startup.

diff --git a/Makefile b/Makefile
index c812dccc9bb2933bd480bb73c5bfa14d351c3af5..4b8184f3c5e0ec58c5d5f747d9aaee5d5c19e8d2 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 .PHONY: qemu
-qemu: out/main OVMF_CODE.fd OVMF_VARS.fd
+qemu: out/main out/startup.nsh OVMF_CODE.fd OVMF_VARS.fd
        # Based on https://wiki.osdev.org/UEFI#Emulation_with_QEMU_and_OVMF
        qemu-system-x86_64 -cpu qemu64 \
                -drive if=pflash,format=raw,unit=0,file=OVMF_CODE.fd,readonly=on \
@@ -18,6 +18,10 @@ out/main: main.asm impl.asm bootstrap.asm sys.f os/uefi.asm
        mkdir -p out
        OS_INCLUDE=os/uefi.asm fasm $< $@
 
+out/startup.nsh:
+       mkdir -p out
+       echo 'fs0:main' >out/startup.nsh
+
 main: main.asm impl.asm bootstrap.asm sys.f os/linux.asm
        OS_INCLUDE=os/linux.asm fasm $< $@