How to chain load other .efi automaticly on loader.efi？

[Annalesa]

I installed a slackware on zroot/ROOT/slackware, I want to do such thing:
Whhen I change BE to zroot/ROOT/slackware and press enter, it run chain /boot/slackware.efi

 

[SirDice]

loader.efi(8) is designed to boot FreeBSD. It is not a "boot selector". What you're looking for is typically done with a boot selector like GRUB or rEFInd.

 

[Annalesa]

I learned that I can write chain_disk="/path/to/efi.efi" in /boot/loader.efi, then there will be a
9. ChainLoad /path/to/efi.efi
option

 

[Emrion]

loader.efi is a PE32+ executable, you cannot write anything inside.
There is no Chain* var in /boot/loader.conf unless it's well hidden.
Looks like an AI hallucination.

 

[Annalesa]

loader.efi is a PE32+ executable, you cannot write anything inside.
There is no Chain* var in /boot/loader.conf unless it's well hidden.
Looks like an AI hallucination.

It's real

 

[Alain De Vos]

Posting AI, use at own discretion,

Adding a Chainload Entry to the Boot Menu (Legacy BIOS)

If you are using a Legacy BIOS system and want to add an entry to the FreeBSD boot menu that chainloads another disk (e.g., a disk with Windows or Linux), you can use the following variable:

• chain_disk="diskX:": Adds a menu entry (usually accessible via F8) to boot from a specific disk.
  • Example for the second disk: chain_disk="disk1:"

 

[Annalesa]

# cat /boot/loader.conf
zfs_load="YES"
chain_disk="/boot/linux.efi"

 

[Emrion]

Ok. I wasn't aware, but loader.efi isn't involved.
Where is it documented? Where do you find this?

 

[Alain De Vos]

nothing in any "man"
Its part of binary loader.lua ; a variable
Somewhere here,
https://github.com/freebsd/freebsd-src/tree/main/stand
(/efi / loader )

 

[sko]

why not just use an EFI loader and just boot its native loader (grub I guess)? chainloading was an ugly hack for legacy boot, but is rather pointless with EFI...