Remove residual blank line at start of Makefile

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

Use 115200 bps by default for serial communication

9600 was a standard baud rate decades ago, but 115200 is now more common
so choose defaults that are useful to the largest number of users.

Note t

Use 115200 bps by default for serial communication

9600 was a standard baud rate decades ago, but 115200 is now more common
so choose defaults that are useful to the largest number of users.

Note that boot0sio does not support rates above 9600 so it remains
unchanged.

Reviewed by: bz, imp, manu
Relnotes: Yes
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D36295

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Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Don't add -Winline for WARNS=6

This warning is very rarely useful (inline is a hint and not mandatory).
This flag results in many warnings being printed when compiling C++
code that uses the standar

Don't add -Winline for WARNS=6

This warning is very rarely useful (inline is a hint and not mandatory).
This flag results in many warnings being printed when compiling C++
code that uses the standard library with GCC.

This flag was originally added in back in r94332 but the flag is a no-op
in Clang ("This diagnostic flag exists for GCC compatibility, and has no
effect in Clang"). Removing it should make the GCC build output slightly
more readable.

Reviewed By: jrtc27, imp
Differential Revision: https://reviews.freebsd.org/D29235

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Remove tests for obsolete compilers in the build system

Assume gcc is at least 6.4, the oldest xtoolchain in the ports tree.
Assume clang is at least 6, which was in 11.2-RELEASE. Drop conditions
f

Remove tests for obsolete compilers in the build system

Assume gcc is at least 6.4, the oldest xtoolchain in the ports tree.
Assume clang is at least 6, which was in 11.2-RELEASE. Drop conditions
for older compilers.

Reviewed by: imp (earlier version), emaste, jhb
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D24802

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Avoid using non-portable dd conv=osync option

The same thing can be achieved using the bs=$SIZE and conv=sync options.
Unlike conv=osync, conv=sync is support on both Linux and macOS.

Reviewed By:

Avoid using non-portable dd conv=osync option

The same thing can be achieved using the bs=$SIZE and conv=sync options.
Unlike conv=osync, conv=sync is support on both Linux and macOS.

Reviewed By: imp, jhb (earlier version)
Obtained from: CheriBSD
Differential Revision: https://reviews.freebsd.org/D24788

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Merge ^/head r358466 through r358677.

Link stand/i386 components using a linker script

LLD 10.0.0 changed the behavior of the -Ttext option, so that using
-Ttext=0x0 now causes linking of the loaders to fail with:

ld: error: output fil

Link stand/i386 components using a linker script

LLD 10.0.0 changed the behavior of the -Ttext option, so that using
-Ttext=0x0 now causes linking of the loaders to fail with:

ld: error: output file too large: 18446744073707016908 bytes

I reported this in https://bugs.llvm.org/show_bug.cgi?id=44715, and
initially reverted the upstream change in r357259 to work around it.

However, after some discussion with Fangrui Song in the upstream ticket,
I think we can classify this as an unfortunate interaction between using
-Ttext=0 in combination with --no-rosegment. (We added the latter
in r332090, because btxld does not correctly handle input with more
than 2 PT_LOAD segments.)

Fangrui suggested to use a linker script instead, and Warner was already
attempting this in r305353, but had to revert it due to "crypto-using
boot problems" (not sure what those were :).

This review updates the stand/i386/boot.ldscript to handle more
sections, inserts some symbols like _edata and such that we use in
libsa, and also discards any .interp section.

It uses ORG which is defined on the linker command line using
--defsym ORG=value to set the start of all the sections.

Reviewed by: imp
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D23952

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Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo". That i

Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo". That is, most of
the earlier separate sub-projects with their own branches and tags were
consolidated into one top-level directory, and are now branched and
tagged together.

Updating the vendor area to match this layout is next.

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Merge ^/head r351317 through r351731.

stand: boot2: fix amd64-xtoolchain-gcc build

-Wno-missing-declarations is the GCC equivalent of
-Wno-missing-prototypes... this was overlooked in r351135.

MFC after: 3 days
X-MFC-With: r351135

stand: boot2: fix build with xtoolchain-llvm90

ufsread.c grows a dependency on __ashldi3 with llvm90. Grab ashldi3.c out of
compiler-rt rather than trying to link against libsa (for now).
-Wno-missi

stand: boot2: fix build with xtoolchain-llvm90

ufsread.c grows a dependency on __ashldi3 with llvm90. Grab ashldi3.c out of
compiler-rt rather than trying to link against libsa (for now).
-Wno-missing-prototypes is necessary to compile ashldi3.c standalone.

Reviewed by: imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D21291

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stand: remove CLANG_NO_IAS from boot2

Many components under stand/ had CLANG_NO_IAS added when Clang's
Integrated Assembler (IAS) did not handle .codeNN directives. Clang
gained support quite some

stand: remove CLANG_NO_IAS from boot2

Many components under stand/ had CLANG_NO_IAS added when Clang's
Integrated Assembler (IAS) did not handle .codeNN directives. Clang
gained support quite some time ago, and we can now build stand/ with
IAS. In most cases IAS- and GNU as-assembled boot components were
identical, and CLANG_NO_IAS was already removed from other components.

Clang IAS produces different output for some components, including
boot2, so CLANG_NO_IAS was not previously removed for those.

In the case of boot2 the difference is that IAS produces a larger
encoding for one instruction (the testb at the beginning of read).

GNU as produces:

2e f6 06 b0 08 80

while IAS includes an address size override prefix (67) and produces:

2e 67 f6 05 b3 08 00 00 80

This results in three fewer NOPs elsewhere in boot2 but no functional
change, so switch to IAS for boot2.

(We can separately pursue improved 16-bit IAS support with the LLVM
developers.)

Sponsored by: The FreeBSD Foundation

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NM and OBJCOPY are already defined for all builds. There's no need to
conditionally define them here.

Merge ^/head r326936 through r327149.

Hoist btx include stuff to i386/Makefile.inc

Sponsored by: Netflix

Merge ^/head r325663 through r325841.

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

Sponsored by: Netflix