Revert "modules: Add missing opt_*.h files for stand-alone compile"

This reverts commit 1a37caeb076b9d31e13c54691d7f1eeb589798bb.

I'd overlooked 06c07e1203324bfe8ab4526c82dbb750864272d5 when I upda

Revert "modules: Add missing opt_*.h files for stand-alone compile"

This reverts commit 1a37caeb076b9d31e13c54691d7f1eeb589798bb.

I'd overlooked 06c07e1203324bfe8ab4526c82dbb750864272d5 when I updated a
branch I'd previously committed but not updated. My search for this in
my tree before the commit was to a stale file...

Sponsored by: Netflix

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modules: Add missing opt_*.h files for stand-alone compile

Standalone compile that we at least create these opt_*.h files.

Sponsored by: Netflix

sys/conf: Introduce NOSAN_CFLAGS and NOSAN_C

To simplify disabling the kernel sanitizers in some files add
NOSAN_CFLAGS and NOSAN_C variables. These are CFLAGS and NORMAL_C with
the sanitizer flags

sys/conf: Introduce NOSAN_CFLAGS and NOSAN_C

To simplify disabling the kernel sanitizers in some files add
NOSAN_CFLAGS and NOSAN_C variables. These are CFLAGS and NORMAL_C with
the sanitizer flags removed.

While here add MSAN_CFLAGS to simplify keeping KMSAN in kern_kcov.c

Reviewed by: khng, brooks, imp, markj
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D45498

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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

linux64: Fix the build on arm64 with bti checking

When we enable checking for BTI on arm64 we need to include an ELF
note in all object files linked into a module.

As using objcopy from a binary to

linux64: Fix the build on arm64 with bti checking

When we enable checking for BTI on arm64 we need to include an ELF
note in all object files linked into a module.

As using objcopy from a binary to an ELF object file doesn't add the
note switch to using .incbin from an assembly file. This allows us to
add the needed note without affecting the included object.

Reviewed by: imp, kib, emaste
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D45468

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sanitizers: Avoid building genassym.c and genoffset.c with sanitizers

Some, particularly KASAN, may insert redzones around global symbols,
resulting in incorrect offset definitions because genassym.

sanitizers: Avoid building genassym.c and genoffset.c with sanitizers

Some, particularly KASAN, may insert redzones around global symbols,
resulting in incorrect offset definitions because genassym.sh (ab)uses
symbol sizes to assign semantic meaning.

(Ideally I would be able to define this pattern in one place, but I
haven't found a way to define a GENSYM_CFLAGS that actually works for
all of the consumers (kern.post.mk, kmod.mk, sys/conf/files*).)

MFC after: 1 week
Sponsored by: Klara, Inc.
Sponsored by: Juniper Networks, Inc.

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sys: ${CFLAGS:N-flto} -> ${CFLAGS:N-flto*}

For the same reason as the original https://reviews.freebsd.org/D9659:
-flto=<N>, -flto=full, and -flto=thin also produce the GIMPLE/bitcode
which is not s

sys: ${CFLAGS:N-flto} -> ${CFLAGS:N-flto*}

For the same reason as the original https://reviews.freebsd.org/D9659:
-flto=<N>, -flto=full, and -flto=thin also produce the GIMPLE/bitcode
which is not supported by genassym, so filter those out as well.

Signed-off-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/898

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sys: Remove $FreeBSD$: one-line sh pattern

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

linux(4): Implement xattr syscalls

Reviewed by:
Differential revision: https://reviews.freebsd.org/D35544
MFC after: 1 month

linux(4): Trim unused opt_usb.h from modules Makefiles

MFC after: 2 weeks

linux(4): Get rid of the opt_compat.h include.

Since e013e369 COMPAT_LINUX, COMPAT_LINUX32 build options are removed,
so include of opt_compat.h is no more needed.

MFC after: 2 weeks

linux64: improve linux_support.s make rules

Previously we relied on the .s.o rule in share/mk/bsd.suffixes.mk to
tell make that linux_support.o is built from linux_support.s, even
though we do not u

linux64: improve linux_support.s make rules

Previously we relied on the .s.o rule in share/mk/bsd.suffixes.mk to
tell make that linux_support.o is built from linux_support.s, even
though we do not use the .s.o rule to assemble it.

Reviewed by: sjg
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D35864

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sys: use .S for assembly language files that use the preprocessor

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/609
Differential Revision: https://reviews.freebsd.org/D3

sys: use .S for assembly language files that use the preprocessor

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/609
Differential Revision: https://reviews.freebsd.org/D35908

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modules: Add missing opt_*.h files for stand-alone compile

Standalone compile that we at least create these opt_*.h files.

Sponsored by: Netflix

linux, linux64: fix module load

The previous commit added references to to the syscallnames arrays, but
failed to add the relevant source files to the module build. Thus, the
modules failed to load

linux, linux64: fix module load

The previous commit added references to to the syscallnames arrays, but
failed to add the relevant source files to the module build. Thus, the
modules failed to load due to missing symbols.

Reported by: cy
Fixes: 1da65dcb1c57 ("linux: populate sv_syscallnames in each sysentvec")
Sponsored by: The FreeBSD Foundation

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linux, linux64: improve SRCS formatting

Sort the entries alphabetically, and list them with one entry per line.
This makes the diffs much cleaner when adding or removing a new entry,
as I will do in

linux, linux64: improve SRCS formatting

Sort the entries alphabetically, and list them with one entry per line.
This makes the diffs much cleaner when adding or removing a new entry,
as I will do in the next commit.

MFC after: 1 week
Sponsored by: The FreeBSD Foundation

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linux(4); Move vdso_selector_x86.c to the linux_common module

MFC after: 2 weeks

linux(4): Implement vdso getcpu for x86.

This is modeled after f2395455 (by kib@).

MFC after: 2 weeks

linux(4): Add a simple rseq syscall implementation.

To avoid annoyng messages from glibc-2.35 test suite add the simple
implementation of rseq syscall which is do nothing for now.

I plan to impleme

linux(4): Add a simple rseq syscall implementation.

To avoid annoyng messages from glibc-2.35 test suite add the simple
implementation of rseq syscall which is do nothing for now.

I plan to implement it if and when the API stabilizes.

MFC after: 2 weeks

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Fix some modules to export more used symbols

and remove non-present symbols that are now reported by kmod_syms.awk.

Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differ

Fix some modules to export more used symbols

and remove non-present symbols that are now reported by kmod_syms.awk.

Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32878

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linux(4): Fix amd64 gcc build.

Do not specify memory model and mregparm for amd64, it's only
available on IA-32 architecture.

Reported by: jhb, jrtc27
MFC after: 2 weeks

linux(4); Almost complete the vDSO.

The vDSO (virtual dynamic shared object) is a small shared library that the
kernel maps R/O into the address space of all Linux processes on image
activation. The

linux(4); Almost complete the vDSO.

The vDSO (virtual dynamic shared object) is a small shared library that the
kernel maps R/O into the address space of all Linux processes on image
activation. The vDSO is a fully formed ELF image, shared by all processes
with the same ABI, has no process private data.

The primary purpose of the vDSO:
- non-executable stack, signal trampolines not copied to the stack;
- signal trampolines unwind, mandatory for the NPTL;
- to avoid contex-switch overhead frequently used system calls can be
implemented in the vDSO: for now gettimeofday, clock_gettime.

The first two have been implemented, so add the implementation of system
calls.

System calls implemenation based on a native timekeeping code with some
limitations:
- ifunc can't be used, as vDSO r/o mapped to the process VA and rtld
can't relocate symbols;
- reading HPET memory is not implemented for now (TODO).

In case on any error vDSO system calls fallback to the kernel system
calls. For unimplemented vDSO system calls added prototypes which call
corresponding kernel system call.

Tested by: trasz (arm64)
Differential revision: https://reviews.freebsd.org/D30900
MFC after: 2 weeks

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linux(4): implement coredumps on arm64

Previously they only worked on amd64.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30975

linux(4): implement coredump support

Implement dumping core for Linux binaries on amd64, for both
32- and 64-bit executables. Some bits are still missing.

This is based on a prototype by chuck@.

linux(4): implement coredump support

Implement dumping core for Linux binaries on amd64, for both
32- and 64-bit executables. Some bits are still missing.

This is based on a prototype by chuck@.

Reviewed By: kib
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30019

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Get rid of i386 ref here as linux64 is a 64-bit module.

Reviewed By: emaste, imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29412