Change Details

According to the [[ https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/boot-introduction.html | handbook ]] and loader(8) man page, we should be able to to things like this: ``` unload load kernel.old ``` and ``` load kernel load splash_bmp load -t splash_image_data /boot/chuckrulez.bmp autoboot 5 ``` However, this is what happens (tested in 13-CURRENT on VM and ZFS and on 12.1 physical machine wiht UFS) In the first case: ``` OK unload OK load kernel.old can't find 'kernel.old' ``` In the second case: ``` OK load kernel.old can't find 'kernel.old' OK load splash_bmp can't find 'splash_bmp' ``` loader(8) man page stattes the following: ``` module_path Sets the list of directories which will be searched for modules named in a load command or implicitly required by a dependency. The default value for this variable is "/boot/kernel;/boot/modules". ``` But `loader(8)` looks for files as follows: if `module_path` is empty, `default_searchpath` (stand/common/modules.c) becomes `/boot/kernel;/boot/modules` and maybe something more in addition (depending on the case). However, because `loader(8)` reads `/boot/defaults/loader.rc` it never applies the default since in that file we set the variable like this: `module_path="/boot/modules;/boot/dtb;/boot/dtb/overlays` Notice that we don't include `/boot/kernel` and hence we can not load kernels or modules (the ones that come with the kernel by default) using non fully qualified paths.

According to the [[https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/boot-introduction.html| handbook ]] and loader(8) man page, we should be able to to things like this: ``` unload load kernel.old ``` and ``` load kernel load splash_bmp load -t splash_image_data /boot/chuckrulez.bmp autoboot 5 ``` However, this is what happens (tested in 13-CURRENT on VM and ZFS and on 12.1 physical machine wiht UFS) In the first case: ``` OK unload OK load kernel.old can't find 'kernel.old' ``` In the second case: ``` OK load kernel.old can't find 'kernel.old' OK load splash_bmp can't find 'splash_bmp' ``` loader(8) man page stattes the following: ``` module_path Sets the list of directories which will be searched for modules named in a load command or implicitly required by a dependency. The default value for this variable is "/boot/kernel;/boot/modules". ``` But `loader(8)` looks for files as follows: if `module_path` is empty, `default_searchpath` (stand/common/modules.c) becomes `/boot/kernel;/boot/modules` and maybe something more in addition (depending on the case). However, because `loader(8)` reads `/boot/defaults/loader.rc` it never applies the default since in that file we set the variable like this: `module_path="/boot/modules;/boot/dtb;/boot/dtb/overlays` Notice that we don't include `/boot/kernel` and hence we can not load kernels or modules (the ones that come with the kernel by default) using non fully qualified paths.

According to the [[https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/boot-introduction.html| handbook ]] and loader(8) man page, we should be able to to things https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/boot-introduction.html | handbook ]] and loader(8) man page, we should be able to to things like this: ``` unload load kernel.old ``` and ``` load kernel load splash_bmp load -t splash_image_data /boot/chuckrulez.bmp autoboot 5 ``` However, this is what happens (tested in 13-CURRENT on VM and ZFS and on 12.1 1 physical machine wiht UFS) In the first case: ``` OK unload OK load kernel.old can't find 'kernel.old' ``` In the second case: ``` OK load kernel.old can't find 'kernel.old' OK load splash_bmp can't find 'splash_bmp' ``` loader(8) man page stattes the following: ``` module_path Sets the list of directories which will be searched for modules named in a load command or implicitly required by a dependency. The default value for this variable is "/boot/kernel;/boot/modules". ``` But `loader(8)` looks for files as follows: if `module_path` is empty, `default_searchpath` (stand/common/modules.c) becomes `/boot/kernel;/boot/modules` and maybe something more in addition (depending on the case). However, because `loader(8)` reads `/boot/defaults/loader.rc` it never applies the default since in that file we set the variable like this: `module_path="/boot/modules;/boot/dtb;/boot/dtb/overlays` Notice that we don't include `/boot/kernel` and hence we can not load kernels or modules (the ones that come with the kernel by default) using non fully qualified paths.