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Add compat.linux.emul_path, so it can be set to something other

Browse Source 
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.

Reviewed by:	bcr (manpages)
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D22574
This commit is contained in:
Edward Tomasz Napierala 2019-12-16 20:07:04 +00:00
parent 83b75bb3cc
commit b5f20658ee
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=355818
7 changed files with 24 additions and 13 deletions
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6
share/man/man4/linux.4
View File

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd November 13, 2019
.Dd December 16, 2019
.Dt LINUX 4
.Os
.Sh NAME
@ -95,6 +95,10 @@ variables and
.Xr loader 8
tunables:
.Bl -tag -width indent
.It Va compat.linux.emul_path
Path to the Linux run-time environment.
Defaults to
.Pa /compat/linux .
.It Va compat.linux.osname
Linux kernel operating system name.
.It Va compat.linux.osrelease

6
sys/amd64/linux/linux_sysvec.c
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@ -836,7 +836,7 @@ static Elf64_Brandinfo linux_glibc2brand = {
.brand = ELFOSABI_LINUX,
.machine = EM_X86_64,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib64/ld-linux-x86-64.so.2",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,
@ -848,7 +848,7 @@ static Elf64_Brandinfo linux_glibc2brandshort = {
.brand = ELFOSABI_LINUX,
.machine = EM_X86_64,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib64/ld-linux.so.2",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,
@ -860,7 +860,7 @@ static Elf64_Brandinfo linux_muslbrand = {
.brand = ELFOSABI_LINUX,
.machine = EM_X86_64,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib/ld-musl-x86_64.so.1",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,

6
sys/amd64/linux32/linux32_sysvec.c
View File

@ -992,7 +992,7 @@ static Elf32_Brandinfo linux_brand = {
.brand = ELFOSABI_LINUX,
.machine = EM_386,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib/ld-linux.so.1",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,
@ -1004,7 +1004,7 @@ static Elf32_Brandinfo linux_glibc2brand = {
.brand = ELFOSABI_LINUX,
.machine = EM_386,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib/ld-linux.so.2",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,
@ -1016,7 +1016,7 @@ static Elf32_Brandinfo linux_muslbrand = {
.brand = ELFOSABI_LINUX,
.machine = EM_386,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib/ld-musl-i386.so.1",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,

3
sys/arm64/linux/linux_sysvec.c
View File

@ -54,6 +54,7 @@ __FBSDID("$FreeBSD$");
#include <compat/linux/linux_ioctl.h>
#include <compat/linux/linux_mib.h>
#include <compat/linux/linux_misc.h>
#include <compat/linux/linux_util.h>
#include <compat/linux/linux_vdso.h>
MODULE_VERSION(linux64elf, 1);
@ -494,7 +495,7 @@ static Elf64_Brandinfo linux_glibc2brand = {
.brand = ELFOSABI_LINUX,
.machine = EM_AARCH64,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib64/ld-linux-x86-64.so.2",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,

8
sys/compat/linux/linux_util.c
View File

@ -46,11 +46,13 @@ __FBSDID("$FreeBSD$");
#include <sys/proc.h>
#include <sys/sdt.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <machine/stdarg.h>
#include <compat/linux/linux_mib.h>
#include <compat/linux/linux_util.h>
MALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures");
@ -58,7 +60,11 @@ MALLOC_DEFINE(M_EPOLL, "lepoll", "Linux events structures");
MALLOC_DEFINE(M_FUTEX, "futex", "Linux futexes");
MALLOC_DEFINE(M_FUTEX_WP, "futex wp", "Linux futex waiting proc");
const char linux_emul_path[] = "/compat/linux";
char linux_emul_path[MAXPATHLEN] = "/compat/linux";
SYSCTL_STRING(_compat_linux, OID_AUTO, emul_path, CTLFLAG_RWTUN,
linux_emul_path, sizeof(linux_emul_path),
"Linux runtime environment path");
/*
* Search an alternate path before passing pathname arguments on to

2
sys/compat/linux/linux_util.h
View File

@ -50,7 +50,7 @@ MALLOC_DECLARE(M_EPOLL);
MALLOC_DECLARE(M_FUTEX);
MALLOC_DECLARE(M_FUTEX_WP);
extern const char linux_emul_path[];
extern char linux_emul_path[];
int linux_emul_convpath(struct thread *, const char *, enum uio_seg, char **, int, int);

6
sys/i386/linux/linux_sysvec.c
View File

@ -974,7 +974,7 @@ static Elf32_Brandinfo linux_brand = {
.brand = ELFOSABI_LINUX,
.machine = EM_386,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib/ld-linux.so.1",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,
@ -986,7 +986,7 @@ static Elf32_Brandinfo linux_glibc2brand = {
.brand = ELFOSABI_LINUX,
.machine = EM_386,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib/ld-linux.so.2",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,
@ -998,7 +998,7 @@ static Elf32_Brandinfo linux_muslbrand = {
.brand = ELFOSABI_LINUX,
.machine = EM_386,
.compat_3_brand = "Linux",
.emul_path = "/compat/linux",
.emul_path = linux_emul_path,
.interp_path = "/lib/ld-musl-i386.so.1",
.sysvec = &elf_linux_sysvec,
.interp_newpath = NULL,