src/sys/amd64/linux/linux_sysvec.c, branch releng/12.2

MFC r347538 by dchagin:

2020-08-24T17:06:34Z

Linuxulator depends on a fundamental kernel settings such as SMP. Many of them listed in opt_global.h which is not generated while building modules outside of a kernel and such modules never match real cofigured kernel. So, we should prevent our users from building obviously defective modules. Therefore, remove the root cause of the building of modules outside of a kernel - the possibility of building modules with DEBUG or KTR flags. And remove all of DEBUG printfs as it is incomplete and in threaded programms not informative, also a half of system call does not have DEBUG printf. For debuging Linux programms we have dtrace, ktr and ktrace ability. PR: 222861

MFC r353725 by yuripv:

2020-08-23T21:48:57Z

linux: futex_mtx should follow futex_list Move futex_mtx to linux_common.ko for amd64 and aarch64 along with respective list/mutex init/destroy. PR: 240989 Reported by: Alex S

MFC r355818:

2020-08-23T20:25:10Z

Add compat.linux.emul_path, so it can be set to something other than "/compat/linux". Useful when you have several compat directories with different Linux versions and you don't want to clash with files installed by linux-c7 packages. Sponsored by: The FreeBSD Foundation

MFC r351783:

2020-08-15T17:02:23Z

Unbreak Linux binaries linked against new glibc, such as the ones from recent Ubuntu versions. Without it they segfault on startup. Sponsored by: The FreeBSD Foundation

MFC r361664:

2020-06-07T17:40:29Z

Handle getcpu() calls in vsyscall emulation on amd64. PR: 246339

MFC r344705:

2019-05-14T19:52:18Z

Remove sv_pagesize, originally introduced with r100384. In all of the architectures we have today, we always use PAGE_SIZE. While in theory one could define different things, none of the current architectures do, even the ones that have transitioned from 32-bit to 64-bit like i386 and arm. Some ancient mips binaries on other systems used 8k instead of 4k, but we don't support running those and likely never will due to their age and obscurity. Differently from the original commit, the merge leaves the struct member in place to preserve the ABI. Sponsored by: DARPA, AFRL

Fix the Linux kernel version number calculation

2018-06-22T00:02:03Z

The Linux compatibility code was converting the version number (e.g. 2.6.32) in two different ways and then comparing the results. The linux_map_osrel() function converted MAJOR.MINOR.PATCH similar to what FreeBSD does natively. I.e. where major=v0, minor=v1, and patch=v2 v = v0 * 1000000 + v1 * 1000 + v2; The LINUX_KERNVER() macro, on the other hand, converted the value with bit shifts. I.e. where major=a, minor=b, and patch=c v = (((a) << 16) + ((b) << 8) + (c)) The Linux kernel uses the later format via the KERNEL_VERSION() macro in include/generated/uapi/linux/version.h Fix is to use the LINUX_KERNVER() macro in linux_map_osrel() as well as in the .trans_osrel functions. PR: 229209 Reviewed by: emaste, cem, imp (mentor) Approved by: imp (mentor) Differential Revision: https://reviews.freebsd.org/D15952

linuxolator/amd64: Don't mangle %r10 on return from syscall for EJUSTRETURN.

2018-06-14T12:35:57Z

This fixes the %r10 content for rt_sigreturn. Submitted by: Yanko Yankulov MFC after: 1 week

Correct pointer subtraction in KASSERT().

2018-05-29T20:03:24Z

The assertion would never fire without truly spectacular future programming errors. Reported by: Coverity CID: 1391370 Sponsored by: DARPA, AFRL

Avoid two suword() calls per auxarg entry.

2018-05-24T16:25:18Z

Instead, construct an auxargs array and copy it out all at once. Use an array of Elf_Auxinfo rather than pairs of Elf_Addr * to represent the array. This is the correct type where pairs of words just happend to work. To reduce the size of the diff, AUXARGS_ENTRY is altered to act on this array rather than introducing a new macro. Return errors on copyout() and suword() failures and handle them in the caller. Incidentally fixes AT_RANDOM and AT_EXECFN in 32-bit linux on amd64 which incorrectly used AUXARG_ENTRY instead of AUXARGS_ENTRY_32 (now removed due to the use of proper types). Reviewed by: kib Comments from: emaste, jhb Obtained from: CheriBSD Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D15485