src/sys/compat/linux/linux_elf.c, branch releng/15.0

linux(4): Remove sys/cdefs.h inclusion where it's not needed due to 685dc743

2023-08-18T10:12:02+00:00

sys: Remove $FreeBSD$: one-line .c pattern

2023-08-16T17:54:36+00:00

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

linux(4): Use inlined LINUX_KERNVER for tests to improve readability

2023-04-26T13:57:30+00:00

MFC after:		1 month

linux(4): Don't relie on process osreldata when testing features

2023-04-26T13:56:41+00:00

The ELF note identifyies the operating-system ABI that the executable
was created for. The note data of the Glibc executable contains the
earliest release number of the Linux kernel that supports this ABI.
As of a current 2.37 version of Glibc, it is 3.2.0 for x86, 3.7.0
for Aarch64.
Glibc does not use this release number and the current kernel's
LINUX_VERSION_CODE to detect kernel features, using fallbacks to known
previous way in case of ENOSYS or something else instead.

A dynamically linked Glibc reads the current kernel's LINUX_VERSION_CODE
from the ELF note in the vDSO or fallback to uname syscall if the vDSO
can't be located and parse the release field in struct utsname. Glibc
uses the current kernel's LINUX_VERSION_CODE for "kernel too old" check.

While here use inlined LINUX_KERNVER for tests to improve readability,
as suggested by emaste@.

MFC after:		1 month

linux(4): Fix arm64 build after b7a6bcdd, missed chunk added

2023-04-22T22:41:12+00:00

MFC after:		1 month

linux(4): Export the AT_MINSIGSTKSZ depending on the process osreldata

2023-04-22T19:17:52+00:00

AT_MINSIGSTKSZ has appeared in the 5.13.0 Linux kernel first time.

Differential Revision:	https://reviews.freebsd.org/D39648
MFC after:		1 month

linux(4): Export the AT_EXECFN depending on the process osreldata

2023-04-22T19:17:36+00:00

AT_EXECFN has appeared in the 2.6.26 Linux kernel first time.

Reviewed by:		emaste
Differential Revision:	https://reviews.freebsd.org/D39647
MFC after:		1 month

linux(4): Export the AT_RANDOM depending on the process osreldata

2023-04-22T19:17:17+00:00

AT_RANDOM has appeared in the 2.6.30 Linux kernel first time.

Reviewed by:		emaste
Differential Revision:	https://reviews.freebsd.org/D39646
MFC after:		1 month

linux(4): Deduplicate linux_copyout_auxargs()

2023-04-22T19:16:02+00:00

Export default MINSIGSTKSZ value for the x86 until we do not preserve AVX
registers in the signal context.

Differential Revision:	https://reviews.freebsd.org/D39644
MFC after:		1 month

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

2023-02-12T17:24:32+00:00

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

MFC after:		2 weeks