Raito Bezarius
9fcfae3eae
feat(recovery): strengthen debugging capabilities of preinit
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Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
2024-09-07 23:30:05 +02:00
Raito Bezarius
95850a44c2
feat(recovery): implement failsafe boot
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for TFTP or anything, really.
Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
2024-09-07 22:49:25 +02:00
Raito Bezarius
afb14d844b
feat(preinit): support alternative roots
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In A/B schemas, it is possible to have multiple rootfs.
Thus, it is necessary to let the B kernel preinitialize either the A
rootfs or the B rootfs failing to mount the A rootfs.
Ideally, we should also try to switch to the B rootfs if we cannot start
up the init on the A rootfs, but that's a FUTUREWORK.
Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
2024-04-21 17:26:37 +02:00
Daniel Barlow
228c0a1668
pass rootOptions config as rootflags= kernel cmdline opt
2024-01-08 18:54:49 +00:00
Daniel Barlow
63f034e362
preinit: parse rootflags= in kernel command line
2024-01-08 00:35:13 +00:00
Daniel Barlow
a8891461aa
use devtmpfs in initramfs
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static device nodes don't work with virtio
2023-12-07 20:03:03 +00:00
Daniel Barlow
c3ccee6506
preinit: print errno (in hex, it's easier) for failures
2023-11-05 11:27:57 +00:00
Daniel Barlow
6db982f25f
preinit: pause before exiting
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as explained in the comment, this is to give us a
chance to see error messages before the kernel panics
2023-11-05 11:27:57 +00:00
Daniel Barlow
86a5224f3c
preinit: fix compiler warnings
2023-11-05 11:27:43 +00:00
Daniel Barlow
155a29d9b3
preinit: strip trailing newline(s) on /proc/cmdline
2023-11-05 11:27:34 +00:00
Daniel Barlow
d2f517a4e9
preinit.c: reindent
2023-10-19 21:02:18 +01:00
Daniel Barlow
0f38ee0e9c
remove PREINIT_USE_LIBC option as it is now the only option
2023-10-19 18:59:02 +01:00
Daniel Barlow
61dc5beca8
preinit: parse rootfstype from kernel command line
2023-10-19 18:56:09 +01:00
Daniel Barlow
0693cf23d8
preinit: improve error logging for fork_exec
2023-10-12 19:00:57 +01:00
Daniel Barlow
1a369ff3bf
preinit: remove no-longer-used mips assembly
2023-10-12 18:57:54 +01:00
Daniel Barlow
6bc45c2b55
preinit: null-terminate argv array for execve
2023-06-22 09:29:44 +01:00
Daniel Barlow
a7e7146887
preinit: disable nolibc
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- it stopped working with 22.11->23.05
- linking statically against musl is about 17k, so
this is costing us 11k or so
2023-06-18 23:04:26 +01:00
Daniel Barlow
5dd0c6e3c0
rewrite preinit as very small C program
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By using the kernel "nolibc" header to avoid requiring a C library, we
can bring the initramfs size to around 4k
This does involve a tiny bit of inline mips assembly which I'm not
sure about. gcc seems unwilling to generate the code to load $gp at
function entry of main(), so we do it by hand - but I'd rather find
out why gcc doesn't.
2023-04-15 18:27:39 +01:00
