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$Id$ -> $FreeBSD$
1999-08-27 21:08:13 -04:00
# $FreeBSD$
First incarnation of our Linux emulator or rather compatibility code. This first shot only incorporaties so much functionality that DOOM can run (the X version), signal handling is VERY weak, so is many other things. But it meets my milestone number one (you guessed it - running DOOM). Uses /compat/linux as prefix for loading shared libs, so it won't conflict with our own libs. Kernel must be compiled with "options COMPAT_LINUX" for this to work.
1995-06-25 13:32:43 -04:00
MFtbemd: Use MACHINE_CPUARCH in preference to MACHINE_ARCH. The former is the source code location of the machine, the latter the binary output. In general, we want to use MACHINE_CPUARCH instead of MACHINE_ARCH unless we're tesitng for a specific target. The isn't even moot for i386/amd64 where there's momemntum towards a MACHINE_CPUARCH == x86, although a specific cleanup for that likely would be needed...
2010-08-23 02:13:29 -04:00
.if ${MACHINE_CPUARCH} == "amd64"
- Add the new files to the linux module. - Prepare the modules for build on amd64, but don't build them there as part of the kernel build yet. The code for the missing symbols on amd64 isn't committed and it may be solved differently. Sponsored by: Google SoC 2006 Submitted by: rdivacky
2006-08-15 09:01:36 -04:00
SFX= 32
Provide groundwork for 32-bit binary compatibility on non-x86 platforms, for upcoming 64-bit PowerPC and MIPS support. This renames the COMPAT_IA32 option to COMPAT_FREEBSD32, removes some IA32-specific code from MI parts of the kernel and enhances the freebsd32 compatibility code to support big-endian platforms. Reviewed by: kib, jhb
2010-03-11 09:49:06 -05:00
CFLAGS+=-DCOMPAT_FREEBSD32 -DCOMPAT_LINUX32
- Add the new files to the linux module. - Prepare the modules for build on amd64, but don't build them there as part of the kernel build yet. The code for the missing symbols on amd64 isn't committed and it may be solved differently. Sponsored by: Google SoC 2006 Submitted by: rdivacky
2006-08-15 09:01:36 -04:00
.endif
sys/modules: normalize .CURDIR-relative paths to SRCTOP This simplifies make output/logic Tested with: `cd sys/modules; make ALL_MODULES=` on amd64 MFC after: 1 month Sponsored by: Dell EMC Isilon
2017-03-04 05:10:17 -05:00
.PATH: ${SRCTOP}/sys/compat/linux ${SRCTOP}/sys/${MACHINE_CPUARCH}/linux${SFX}
linux(4): Deduplicate unimpl/dummy syscall handlers No functional change. Reviewed by: emaste, trasz Differential Revision: https://reviews.freebsd.org/D27099
2020-11-05 14:30:31 -05:00
.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
.PATH: ${SRCTOP}/sys/x86/linux
.endif
Use a consistent style and one much closer to the rest of /usr/src
2001-01-06 09:00:42 -05:00
Sample initial set of kld-ified modules. Not all have been completely converted yet. These are more of a starting point. This is NOT connected to the parent Makefile. OK'ed by jkh (who is ever so patiently waiting)
1998-10-16 00:30:52 -04:00
KMOD= linux
linux, linux64: improve SRCS formatting Sort the entries alphabetically, and list them with one entry per line. This makes the diffs much cleaner when adding or removing a new entry, as I will do in the next commit. MFC after: 1 week Sponsored by: The FreeBSD Foundation
2022-10-29 11:28:16 -04:00
SRCS= linux${SFX}_dummy_machdep.c \
linux(4): Add coredump support to i386. MFC after: 1 week
2023-02-02 09:58:06 -05:00
linux_elf32.c \
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
2022-10-29 11:28:16 -04:00
linux_event.c \
linux_file.c \
linux_fork.c \
linux_futex.c \
linux_getcwd.c \
linux_ioctl.c \
linux_ipc.c \
linux${SFX}_machdep.c \
linux_misc.c \
linux_rseq.c \
linux_signal.c \
linux_socket.c \
linux_stats.c \
linux, linux64: fix module load The previous commit added references to to the syscallnames arrays, but failed to add the relevant source files to the module build. Thus, the modules failed to load due to missing symbols. Reported by: cy Fixes: 1da65dcb1c57 ("linux: populate sv_syscallnames in each sysentvec") Sponsored by: The FreeBSD Foundation
2022-10-29 11:30:32 -04:00
linux${SFX}_syscalls.c \
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
2022-10-29 11:28:16 -04:00
linux_sysctl.c \
linux${SFX}_sysent.c \
linux${SFX}_sysvec.c \
linux_time.c \
linux_timer.c \
linux_uid16.c \
linux_vdso.c \
opt_inet6.h \
modules: Add missing opt_*.h files for stand-alone compile Standalone compile that we at least create these opt_*.h files. Sponsored by: Netflix
2022-10-29 10:49:20 -04:00
opt_ktrace.h \
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
2022-10-29 11:28:16 -04:00
opt_posix.h \
bus_if.h \
device_if.h \
vnode_if.h
linux(4): Deduplicate unimpl/dummy syscall handlers No functional change. Reviewed by: emaste, trasz Differential Revision: https://reviews.freebsd.org/D27099
2020-11-05 14:30:31 -05:00
.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
linux(4); Move vdso_selector_x86.c to the linux_common module MFC after: 2 weeks
2022-05-23 06:19:07 -04:00
SRCS+= linux_dummy_x86.c
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
2021-07-20 03:01:18 -04:00
VDSODEPS=linux_vdso_gettc_x86.inc
linux(4): Deduplicate unimpl/dummy syscall handlers No functional change. Reviewed by: emaste, trasz Differential Revision: https://reviews.freebsd.org/D27099
2020-11-05 14:30:31 -05:00
.endif
Fix futexes on i386 after the 4/4G split. Use proper method to access userspace. For now, only the slow copyout path is implemented. Reported and tested by: tijl (previous version) Sponsored by: The FreeBSD Foundation
2018-04-24 08:50:21 -04:00
.if ${MACHINE_CPUARCH} == "amd64"
sys: use .S for assembly language files that use the preprocessor Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/609 Differential Revision: https://reviews.freebsd.org/D35908
2022-07-24 19:14:20 -04:00
SRCS+= linux${SFX}_support.S
Fix futexes on i386 after the 4/4G split. Use proper method to access userspace. For now, only the slow copyout path is implemented. Reported and tested by: tijl (previous version) Sponsored by: The FreeBSD Foundation
2018-04-24 08:50:21 -04:00
.endif
Rename assym.s to assym.inc assym is only to be included by other .s files, and should never actually be assembled by itself. Reviewed by: imp, bdrewery (earlier) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D14180
2018-03-20 13:58:51 -04:00
DPSRCS= assym.inc linux${SFX}_genassym.c
Move futex support code from <arch>/support.s into linux compat directory. Implement all futex atomic operations in assembler to not depend on the fuword() that does not allow to distinguish between -1 and failure return. Correctly return 0 from atomic operations on success. In collaboration with: rdivacky Tested by: Scot Hetzel <swhetzel gmail com>, Milos Vyletel <mvyletel mzm cz> Sponsored by: Google SoC 2007
2007-05-23 04:33:06 -04:00
Rename assym.s to assym.inc assym is only to be included by other .s files, and should never actually be assembled by itself. Reviewed by: imp, bdrewery (earlier) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D14180
2018-03-20 13:58:51 -04:00
# XXX: for assym.inc
Move most of the contents of opt_compat.h to opt_global.h. opt_compat.h is mentioned in nearly 180 files. In-progress network driver compabibility improvements may add over 100 more so this is closer to "just about everywhere" than "only some files" per the guidance in sys/conf/options. Keep COMPAT_LINUX32 in opt_compat.h as it is confined to a subset of sys/compat/linux/*.c. A fake _COMPAT_LINUX option ensure opt_compat.h is created on all architectures. Move COMPAT_LINUXKPI to opt_dontuse.h as it is only used to control the set of compiled files. Reviewed by: kib, cem, jhb, jtl Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D14941
2018-04-06 13:35:35 -04:00
SRCS+= opt_kstack_pages.h opt_nfs.h opt_hwpmc_hooks.h
MFtbemd: Use MACHINE_CPUARCH in preference to MACHINE_ARCH. The former is the source code location of the machine, the latter the binary output. In general, we want to use MACHINE_CPUARCH instead of MACHINE_ARCH unless we're tesitng for a specific target. The isn't even moot for i386/amd64 where there's momemntum towards a MACHINE_CPUARCH == x86, although a specific cleanup for that likely would be needed...
2010-08-23 02:13:29 -04:00
.if ${MACHINE_CPUARCH} == "i386"
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
2022-10-29 11:28:16 -04:00
SRCS+= opt_apic.h opt_cpu.h
Move opt_apic.h closer to the "XXX: for assym.s" comment. Suggested by: jhb MFC after: 1 week
2009-05-26 16:57:19 -04:00
.endif
Move futex support code from <arch>/support.s into linux compat directory. Implement all futex atomic operations in assembler to not depend on the fuword() that does not allow to distinguish between -1 and failure return. Correctly return 0 from atomic operations on success. In collaboration with: rdivacky Tested by: Scot Hetzel <swhetzel gmail com>, Milos Vyletel <mvyletel mzm cz> Sponsored by: Google SoC 2007
2007-05-23 04:33:06 -04:00
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
2021-07-20 03:01:18 -04:00
OBJS= linux${SFX}_vdso.so
Implement vdso - virtual dynamic shared object. Through vdso Linux exposes functions from kernel with proper DWARF CFI information so that it becomes easier to unwind through them. Using vdso is a mandatory for a thread cancelation && cleanup on a modern glibc. Differential Revision: https://reviews.freebsd.org/D1060
2015-05-24 11:28:17 -04:00
MFtbemd: Use MACHINE_CPUARCH in preference to MACHINE_ARCH. The former is the source code location of the machine, the latter the binary output. In general, we want to use MACHINE_CPUARCH instead of MACHINE_ARCH unless we're tesitng for a specific target. The isn't even moot for i386/amd64 where there's momemntum towards a MACHINE_CPUARCH == x86, although a specific cleanup for that likely would be needed...
2010-08-23 02:13:29 -04:00
.if ${MACHINE_CPUARCH} == "i386"
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
2022-10-29 11:28:16 -04:00
SRCS+= imgact_linux.c \
linux.c \
linux_dummy.c \
linux_emul.c \
linux_errno.c \
linux_mib.c \
linux_mmap.c \
linux_ptrace_machdep.c \
linux_util.c \
linux_vdso_selector_x86.c \
linux(4): Move inclusion of i386-specific files under common condition
2023-03-31 07:56:29 -04:00
linux_x86.c \
linux_copyout.c \
linux(4): Fix opt_netlink.h inclusion Add opt_netlink.h to the linux_common module, on i386, where we don't uses linux_common module, move opt_netlink.h inclusion under i386 condition. MFC after: 2 weeks
2023-03-31 07:56:59 -04:00
linux_netlink.c \
opt_netlink.h
Two sys/compat/linux sources aren't applicable on the Alpha at this time.
2000-09-06 16:21:15 -04:00
.endif
Introduce a new module linux_common.ko which is intended for the following primary purposes: 1. Remove the dependency of linsysfs and linprocfs modules from linux.ko, which will be architecture specific on amd64. 2. Incorporate into linux_common.ko general code for platforms on which we'll support two Linuxulator modules (for both instruction set - 32 & 64 bit). 3. Move malloc(9) declaration to linux_common.ko, to enable getting memory usage statistics properly. Currently linux_common.ko incorporates a code from linux_mib.c and linux_util.c and linprocfs, linsysfs and linux kernel modules depend on linux_common.ko. Temporarily remove dtrace garbage from linux_mib.c and linux_util.c Differential Revision: https://reviews.freebsd.org/D1072 In collaboration with: Vassilis Laganakos. Reviewed by: trasz
2015-05-24 11:51:18 -04:00
.if ${MACHINE_CPUARCH} == "i386"
(Belatedly) add the required EXPORT_SYMS. I'm not sure the list is complete, but at least linprocfs works (I haven't had the opportunity to test other stuff that depends on the linux module, like aac or tdfx)
2002-02-22 13:21:20 -05:00
EXPORT_SYMS=
EXPORT_SYMS+= linux_get_osname
EXPORT_SYMS+= linux_get_osrelease
EXPORT_SYMS+= linux_ioctl_register_handler
EXPORT_SYMS+= linux_ioctl_unregister_handler
Introduce a new module linux_common.ko which is intended for the following primary purposes: 1. Remove the dependency of linsysfs and linprocfs modules from linux.ko, which will be architecture specific on amd64. 2. Incorporate into linux_common.ko general code for platforms on which we'll support two Linuxulator modules (for both instruction set - 32 & 64 bit). 3. Move malloc(9) declaration to linux_common.ko, to enable getting memory usage statistics properly. Currently linux_common.ko incorporates a code from linux_mib.c and linux_util.c and linprocfs, linsysfs and linux kernel modules depend on linux_common.ko. Temporarily remove dtrace garbage from linux_mib.c and linux_util.c Differential Revision: https://reviews.freebsd.org/D1072 In collaboration with: Vassilis Laganakos. Reviewed by: trasz
2015-05-24 11:51:18 -04:00
.endif
(Belatedly) add the required EXPORT_SYMS. I'm not sure the list is complete, but at least linprocfs works (I haven't had the opportunity to test other stuff that depends on the linux module, like aac or tdfx)
2002-02-22 13:21:20 -05:00
The build process generates assym.inc from genassym.o, so don't forget to clean genassym.o MFC after: 2 weeks
2019-05-06 14:46:42 -04:00
CLEANFILES= linux${SFX}_assym.h linux${SFX}_genassym.o linux${SFX}_locore.o \
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
2021-07-20 03:01:18 -04:00
genassym.o linux${SFX}_vdso_gtod.o linux${SFX}_vdso.so.o
Update the linux lkm to use the new file list and build routine. This is a bit of a kludge and needs more work.
1996-03-02 15:00:35 -05:00
- Add the new files to the linux module. - Prepare the modules for build on amd64, but don't build them there as part of the kernel build yet. The code for the missing symbols on amd64 isn't committed and it may be solved differently. Sponsored by: Google SoC 2006 Submitted by: rdivacky
2006-08-15 09:01:36 -04:00
linux${SFX}_assym.h: linux${SFX}_genassym.o
Retire the '@' symlink. It isn't really needed and causes more problems than it solves. SYSDIR is already defined almost always and can be used instead. Working around the one case where it isn't is much easier than working around the fact that @ may not exist in 18 other places. Differential Revision: https://reviews.freebsd.org/D1100
2014-11-06 11:48:37 -05:00
sh ${SYSDIR}/kern/genassym.sh linux${SFX}_genassym.o > ${.TARGET}
Update the linux lkm to use the new file list and build routine. This is a bit of a kludge and needs more work.
1996-03-02 15:00:35 -05:00
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
2021-07-20 03:01:18 -04:00
.if ${MACHINE_CPUARCH} == "amd64"
Revert "linux32: add a hack to avoid redefining the type of the savefpu tag" This reverts commit 0f6829488ef32142b9ea1c0806fb5ecfe0872c02. Also it changes the type of md_usr_fpu_save struct mdthread member to void *, which is what uncovered this trouble. Now the save area is untyped, but since it is hidden behind accessors, it is not too significant. Since apparently there are consumers affected outside the tree, this hack is better than one from the reverted revision. PR: 258678 Reported by: cy Reviewed by: cy, kevans, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D32060
2021-09-22 14:54:39 -04:00
VDSOFLAGS=-DCOMPAT_FREEBSD32 -DCOMPAT_LINUX32 -m32
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
2021-07-26 15:28:21 -04:00
.else
VDSOFLAGS=-mregparm=0
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
2021-07-20 03:01:18 -04:00
.endif
Rename assym.s to assym.inc assym is only to be included by other .s files, and should never actually be assembled by itself. Reviewed by: imp, bdrewery (earlier) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D14180
2018-03-20 13:58:51 -04:00
linux${SFX}_locore.o: linux${SFX}_assym.h assym.inc
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
2021-07-20 03:01:18 -04:00
${CC} -c -x assembler-with-cpp -DLOCORE -fPIC -pipe -O2 -Werror \
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
2021-07-26 15:28:21 -04:00
-msoft-float \
linux(4): Fix i386 gcc build. Do not specify memory model for i386. Seems that clang silencly ignores -mcmodel unlike gcc. Reported by: jhb MFC after: 2 weeks
2021-07-26 14:28:16 -04:00
-fno-common -nostdinc -fasynchronous-unwind-tables \
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
2021-07-20 03:01:18 -04:00
-fno-omit-frame-pointer -foptimize-sibling-calls ${VDSOFLAGS} \
-fno-stack-protector -I. -I${SYSDIR} -I${SRCTOP}/include \
Use a consistent style and one much closer to the rest of /usr/src
2001-01-06 09:00:42 -05:00
${.IMPSRC} -o ${.TARGET}
Update the linux lkm to use the new file list and build routine. This is a bit of a kludge and needs more work.
1996-03-02 15:00:35 -05:00
linux(4); Almost complete the vDSO. The vDSO (virtual dynamic shared object) is a small shared library that the kernel maps R/O into the address space of all Linux processes on image activation. The vDSO is a fully formed ELF image, shared by all processes with the same ABI, has no process private data. The primary purpose of the vDSO: - non-executable stack, signal trampolines not copied to the stack; - signal trampolines unwind, mandatory for the NPTL; - to avoid contex-switch overhead frequently used system calls can be implemented in the vDSO: for now gettimeofday, clock_gettime. The first two have been implemented, so add the implementation of system calls. System calls implemenation based on a native timekeeping code with some limitations: - ifunc can't be used, as vDSO r/o mapped to the process VA and rtld can't relocate symbols; - reading HPET memory is not implemented for now (TODO). In case on any error vDSO system calls fallback to the kernel system calls. For unimplemented vDSO system calls added prototypes which call corresponding kernel system call. Tested by: trasz (arm64) Differential revision: https://reviews.freebsd.org/D30900 MFC after: 2 weeks
2021-07-20 03:01:18 -04:00
linux${SFX}_vdso_gtod.o: linux_vdso_gtod.inc ${VDSODEPS}
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
2021-07-26 15:28:21 -04:00
${CC} -c -fPIC -pipe -O2 -Werror -msoft-float \
linux(4): Fix i386 gcc build. Do not specify memory model for i386. Seems that clang silencly ignores -mcmodel unlike gcc. Reported by: jhb MFC after: 2 weeks
2021-07-26 14:28:16 -04:00
-fno-common -nostdinc -fasynchronous-unwind-tables \
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
2021-07-20 03:01:18 -04:00
-fno-omit-frame-pointer -foptimize-sibling-calls ${VDSOFLAGS} \
-fno-stack-protector -I. -I${SYSDIR} -I${SRCTOP}/include \
${.IMPSRC} -o ${.TARGET}
linux${SFX}_vdso.so.o: linux${SFX}_locore.o linux${SFX}_vdso_gtod.o
${LD} -m elf_i386 --shared --eh-frame-hdr -soname=linux-gate.so.1 \
--no-undefined --hash-style=both -warn-common -nostdlib \
--strip-debug -s --build-id=sha1 --Bsymbolic \
-T${SRCTOP}/sys/${MACHINE}/linux${SFX}/linux${SFX}_vdso.lds.s \
-o ${.TARGET} ${.ALLSRC:M*.o}
.if ${MACHINE_CPUARCH} == "amd64"
OBJCOPY_TARGET=--output-target elf64-x86-64-freebsd --binary-architecture i386
.elif ${MACHINE_CPUARCH} == "i386"
OBJCOPY_TARGET=--output-target elf32-i386-freebsd --binary-architecture i386
.else
.error ${MACHINE_CPUARCH} not yet supported by linux
.endif
linux${SFX}_vdso.so: linux${SFX}_vdso.so.o
${OBJCOPY} --input-target binary ${OBJCOPY_TARGET} \
linux${SFX}_vdso.so.o ${.TARGET}
${STRIPBIN} -N _binary_linux${SFX}_vdso_so_o_size ${.TARGET}
Fix futexes on i386 after the 4/4G split. Use proper method to access userspace. For now, only the slow copyout path is implemented. Reported and tested by: tijl (previous version) Sponsored by: The FreeBSD Foundation
2018-04-24 08:50:21 -04:00
.if ${MACHINE_CPUARCH} == "amd64"
linux64: improve linux_support.s make rules Previously we relied on the .s.o rule in share/mk/bsd.suffixes.mk to tell make that linux_support.o is built from linux_support.s, even though we do not use the .s.o rule to assemble it. Reviewed by: sjg MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D35864
2022-07-19 16:42:27 -04:00
linux${SFX}_support.o: linux${SFX}_support.S linux${SFX}_assym.h assym.inc
Move futex support code from <arch>/support.s into linux compat directory. Implement all futex atomic operations in assembler to not depend on the fuword() that does not allow to distinguish between -1 and failure return. Correctly return 0 from atomic operations on success. In collaboration with: rdivacky Tested by: Scot Hetzel <swhetzel gmail com>, Milos Vyletel <mvyletel mzm cz> Sponsored by: Google SoC 2007
2007-05-23 04:33:06 -04:00
${CC} -c -x assembler-with-cpp -DLOCORE ${CFLAGS} \
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
2022-07-19 16:42:27 -04:00
${.ALLSRC:M*.S:u} -o ${.TARGET}
Implement vdso - virtual dynamic shared object. Through vdso Linux exposes functions from kernel with proper DWARF CFI information so that it becomes easier to unwind through them. Using vdso is a mandatory for a thread cancelation && cleanup on a modern glibc. Differential Revision: https://reviews.freebsd.org/D1060
2015-05-24 11:28:17 -04:00
.endif
All genassym.sh usage need offset.inc
2018-07-03 17:02:25 -04:00
linux${SFX}_genassym.o: offset.inc
More fixes to build the kernel with a compiler that defaults to -fno-common Using the same approach as the last commit for the files used by genassym.sh. Obtained from: CheriBSD
2020-04-18 08:54:40 -04:00
${CC} -c ${CFLAGS:N-flto:N-fno-common} -fcommon ${.IMPSRC}
Update the linux lkm to use the new file list and build routine. This is a bit of a kludge and needs more work.
1996-03-02 15:00:35 -05:00
Add warning to the Linuxulator makefiles that building it outside of a kernel does not make sence. PR: 222861 MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D20179
2019-05-13 14:28:40 -04:00
.if !defined(KERNBUILDDIR)
.warning Building Linuxulator outside of a kernel does not make sense
.endif
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
2021-11-07 03:42:24 -05:00
EXPORT_SYMS= YES
Use .include <bsd.kmod.mk> to get to ../../*/conf/kmod.mk instead of encoding the relative path.
2000-05-26 21:14:33 -04:00
.include <bsd.kmod.mk>
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