Hi Wang,

BL31 is not designed to have image loading capabilities.

BL2 is the boot stage, supposed to load all the images (BL1 has minimal support to load just BL2).

If you want a custom image load capability in BL31, you need to implement it in platform (as we won't support this in generic code).
Also, I guess the image which you want to load is not part of FIP image, if that is the case then you can have simple implementation of loading image (without using the image loading framework).

You can refer to plat/arm/board/n1sdp/n1sdp_bl31_setup.c

Thanks
Manish
From: TF-A <tf-a-bounces@lists.trustedfirmware.org> on behalf of Chenxu Wang via TF-A <tf-a@lists.trustedfirmware.org>
Sent: 06 December 2021 08:39
To: tf-a@lists.trustedfirmware.org <tf-a@lists.trustedfirmware.org>
Subject: [TF-A] How to load some images in BL31?
 
Hi all,

I want to load a specific image in BL31. But when I call
load_auth_image(). It says

"in function `load_image':
trusted-firmware-a/common/bl_common.c:87: undefined reference to
`plat_get_image_source'"

Also, the io_read, io_size and etc. are undefined reference.

I find other BL files (bl1, bl2) will call the load_auth_image() in
their main functions or sub-functions. If I want to implement it on
BL31, what should I do? Should I modify the Makefile?

Sincerely,
Wang
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