22e6a67086
The boot metadata (also referred to as modinfo, or preload metadata) provides information about the size and location of the kernel, pre-loaded modules, and other metadata (e.g. the EFI framebuffer) to be consumed during by the kernel during early boot. It is encoded as a series of type-length-value entries and is usually constructed by loader(8) and passed to the kernel. It is also faked on some architectures when booted by other means. Although much of the module information is available via kldstat(8), there is no easy way to debug the metadata in its entirety. Add some routines to parse this data and allow it to be printed to the console during early boot or output via a sysctl. Since the output can be lengthly, printing to the console is gated behind the debug.dump_modinfo_at_boot kenv variable as well as the BOOTVERBOSE flag. The sysctl to print the metadata is named debug.dump_modinfo. Reviewed by: tsoome Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D26687 |
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| linux | ||
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| pci | ||
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| Makefile | ||