libsa: Remove redundant sys/cdefs.h

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

stand/ofw: Subclass devnet to cope with ofw's unique needs

We need to match devices in a slightly special way: We have to look up
the path and see if the device is a 'network' device in order to use

stand/ofw: Subclass devnet to cope with ofw's unique needs

We need to match devices in a slightly special way: We have to look up
the path and see if the device is a 'network' device in order to use it.

Sponsored by: Netflix
Tested by: grehan@ (with tweaks to my original patch)
Differential Revision: https://reviews.freebsd.org/D37557

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stand: s/libstand/libsa/g to catch up with rename

We renamed libstand to libsa years ago with the move from sys/boot to
stand. Catch up in the comments.

Sponsored by: Netflix

Add support to MSDOS FS in PPC loader

Although PPC OFW loader already had a LOADER_MSDOS_SUPPORT option, a few lines
were missing in conf.c, in order to support FAT filesystems.

This is useful when

Add support to MSDOS FS in PPC loader

Although PPC OFW loader already had a LOADER_MSDOS_SUPPORT option, a few lines
were missing in conf.c, in order to support FAT filesystems.

This is useful when running FreeBSD under QEMU, to be able to easily change the
kernel and modules when running on hosts without UFS read/write support.

Reviewed by: jhibbits
Sponsored by: Eldorado Research Institute (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D24328

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stand: -fno-common fixes for !x86 loaders

- beriloader: archsw is declared extern and defined elsewhere
- ofwloader: ofw_elf{,64} are defined in elf_freebsd.c and
ppc64_elf_freebsd.c respectively

stand: -fno-common fixes for !x86 loaders

- beriloader: archsw is declared extern and defined elsewhere
- ofwloader: ofw_elf{,64} are defined in elf_freebsd.c and
ppc64_elf_freebsd.c respectively
- ubldr: syscall_ptr is defined in start.S for whichever ubldr platform is
building

-fno-common will become the default in GCC10/LLVM11.

MFC after: 3 days

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Move "common" Open Firmware parts of the loader used only on PowerPC to
the powerpc/ subdirectory. These have never used by SPARC and we have
no other (and almost certainly will have no other) Open F

Move "common" Open Firmware parts of the loader used only on PowerPC to
the powerpc/ subdirectory. These have never used by SPARC and we have
no other (and almost certainly will have no other) Open Firmware platforms.
This makes the directory structure simpler and lets us avoid some
cargo-cult MI patterns on code that is, and always was,
architecture-specific.

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Merge ^/head r325663 through r325841.

Move sys/boot to stand. Fix all references to new location

Sponsored by: Netflix