3rd-party/linux-kernel-module-cheat
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copy-overlay: document you need to ./build-buildroot afterwards

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Ciro Santilli 六四事件 法轮功
2019-01-22 00:00:00 +00:00
parent a5790e0a39
commit 4a92813252
2 changed files with 20 additions and 9 deletions
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23
README.adoc
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@@ -11851,13 +11851,15 @@ We use this directory for:
+ +
C files for example need compilation, and must go through the regular package system, e.g. through link:kernel_modules/user[]. C files for example need compilation, and must go through the regular package system, e.g. through link:kernel_modules/user[].
This directory is copied into the target filesystem by link:copy-overlay[], which then it visible via <<9p>> on the guest at: This directory is copied into the target filesystem by:
.... ....
ls /mnt/9p/out_rootfs_overlay ./copy-overlay
.... ....
Furthermore, since this directory does not require compilation, we also make it <<9p>> available to the guest directly even without `copy-overlay` at: Source link:copy-overlay[]
Since this directory does not require compilation, we also make it <<9p>> available to the guest directly even without `copy-overlay` at:
.... ....
ls /mnt/9p/rootfs_overlay ls /mnt/9p/rootfs_overlay
@@ -11865,6 +11867,19 @@ ls /mnt/9p/rootfs_overlay
This way you can just hack away the scripts and try them out immediately without any further operations. This way you can just hack away the scripts and try them out immediately without any further operations.
To add those scripts to the Buildroot root filesystem, you will need to run:
....
./build-buildroot
....
We could add that directory to `BR2_ROOTFS_OVERLAY` but we don't do this because this mechanism:
* also works for non Buildroot root filesystesms
* places everything in one place for a nice 9P mount
and maintaining `BR2_ROOTFS_OVERLAY` in addition to our mechanism would duplicate some logic.
=== Test this repo === Test this repo
==== Automated tests ==== Automated tests
@@ -11883,7 +11898,7 @@ Sources:
* link:build-test[] * link:build-test[]
* link:test[] * link:test[]
* link:test-module[] * link:test-modules[]
* <<user-mode-tests>> * <<user-mode-tests>>
* <<baremetal-tests>> * <<baremetal-tests>>

6
copy-overlay
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@@ -11,11 +11,7 @@ class Main(common.BuildCliFunction):
def __init__(self): def __init__(self):
super().__init__( super().__init__(
description='''\ description='''\
Copy our git tracked rootfs_overlay to the final generated rootfs_overlay https://github.com/cirosantilli/linux-kernel-module-cheat#rootfs_overlay
that also contains generated build outputs. This has the following advantages
over just adding that to BR2_ROOTFS_OVERLAY:
- also works for non Buildroot root filesystesms
- places everything in one place for a nice 9P mount
''') ''')
def build(self): def build(self):