Changes in Makefile

127b0e05 - vdso: Rename included Makefile

Tue, 04 Feb 2025 12:05:36 +0000

vdso: Rename included MakefileAs the Makefile is included into other Makefiles it can not be used todefine objects to be built from the current source directory.However the generic datastore will introduce such a local source file.Rename the included Makefile so it is clear how it is to be used and tomake room for a regular Makefile in lib/vdso/.Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-4-13a4669dfc8c@linutronix.de List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile

cf124696 - csky/vdso: Remove gettimeofday() and friends from VDSO

Thu, 10 Oct 2024 07:01:03 +0000

csky/vdso: Remove gettimeofday() and friends from VDSOThe time-related VDSO functionality was introduced in 2021 incommit 87f3248cdb9a ("csky: Reconstruct VDSO framework") andcommit 0d3b051adbb7 ("csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO").However the corresponding aux-vector entry AT_SYSINFO_EHDR was neverwired up, making these functions impossible to test or use.The VDSO itself is kept as it also provides rt_sigreturn which isexposed differently to userspace.Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20241010-vdso-generic-base-v1-1-b64f0842d512@linutronix.de List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile

7f7f6f7a - Makefile: remove redundant tool coverage variables

Mon, 06 May 2024 13:35:43 +0000

Makefile: remove redundant tool coverage variablesNow Kbuild provides reasonable defaults for objtool, sanitizers, andprofilers.Remove redundant variables.Note:This commit changes the coverage for some objects: - include arch/mips/vdso/vdso-image.o into UBSAN, GCOV, KCOV - include arch/sparc/vdso/vdso-image-*.o into UBSAN - include arch/sparc/vdso/vma.o into UBSAN - include arch/x86/entry/vdso/extable.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vdso-image-*.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vdso32-setup.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vma.o into GCOV, KCOV - include arch/x86/um/vdso/vma.o into KASAN, GCOV, KCOVI believe these are positive effects because all of them are kernelspace objects.Signed-off-by: Masahiro Yamada Reviewed-by: Kees Cook Tested-by: Roberto Sassu List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile

b1992c37 - kbuild: use $(src) instead of $(srctree)/$(src) for source directory

Sat, 27 Apr 2024 14:55:02 +0000

kbuild: use $(src) instead of $(srctree)/$(src) for source directoryKbuild conventionally uses $(obj)/ for generated files, and $(src)/ forchecked-in source files. It is merely a convention without any functionaldifference. In fact, $(obj) and $(src) are exactly the same, as definedin scripts/Makefile.build: src := $(obj)When the kernel is built in a separate output directory, $(src) doesnot accurately reflect the source directory location. While Kbuildresolves this discrepancy by specifying VPATH=$(srctree) to search forsource files, it does not cover all cases. For example, when adding aheader search path for local headers, -I$(srctree)/$(src) is typicallypassed to the compiler.This introduces inconsistency between upstream and downstream Makefilesbecause $(src) is used instead of $(srctree)/$(src) for the latter.To address this inconsistency, this commit changes the semantics of$(src) so that it always points to the directory in the source tree.Going forward, the variables used in Makefiles will have the followingmeanings: $(obj) - directory in the object tree $(src) - directory in the source tree (changed by this commit) $(objtree) - the top of the kernel object tree $(srctree) - the top of the kernel source treeConsequently, $(srctree)/$(src) in upstream Makefiles need to be replacedwith $(src).Signed-off-by: Masahiro Yamada Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile

b957df3b - arch: use $(obj)/ instead of $(src)/ for preprocessed linker scripts

Sat, 27 Apr 2024 14:54:59 +0000

arch: use $(obj)/ instead of $(src)/ for preprocessed linker scriptsThese are generated files. Prefix them with $(obj)/ instead of $(src)/.Signed-off-by: Masahiro Yamada Acked-by: Helge Deller Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile

737d3036 - csky: remove unused cmd_vdso_install

Mon, 09 Oct 2023 12:42:06 +0000

csky: remove unused cmd_vdso_installYou cannot run this code because arch/csky/Makefile does not define thevdso_install target.It appears that this code was blindly copied from another architecture.Remove the dead code.Signed-off-by: Masahiro Yamada Acked-by: Guo Ren List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile

aff69273 - vdso: Improve cmd_vdso_check to check all dynamic relocations

Fri, 10 Mar 2023 19:07:50 +0000

vdso: Improve cmd_vdso_check to check all dynamic relocationsThe actual intention is that no dynamic relocation exists in the VDSO. Forthis the VDSO build validates that the resulting .so file does not have anyrelocations which are specified via $(ARCH_REL_TYPE_ABS) per architecture,which is fragile as e.g. ARM64 lacks an entry for R_AARCH64_RELATIVE. Asideof that ARCH_REL_TYPE_ABS is a misnomer as it checks for relativerelocations too.However, some GNU ld ports produce unneeded R_*_NONE relocation entries. Ifa port fails to determine the exact .rel[a].dyn size, the trailing zerosbecome R_*_NONE relocations. E.g. ld's powerpc port recently fixedhttps://sourceware.org/bugzilla/show_bug.cgi?id=29540). R_*_NONE aregenerally a no-op in the dynamic loaders. So just ignore them.Remove the ARCH_REL_TYPE_ABS defines and just validate that the resulting.so file does not contain any R_* relocation entries except R_*_NONE.Signed-off-by: Fangrui Song Signed-off-by: Thomas Gleixner Tested-by: Vincenzo Frascino # for aarch64Reviewed-by: Christophe Leroy Reviewed-by: Vincenzo Frascino # for vDSO, aarch64Acked-by: Michael Ellerman (powerpc)Link: https://lore.kernel.org/r/20230310190750.3323802-1-maskray@google.com List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile

0d3b051a - csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO

Sun, 17 Jan 2021 15:38:18 +0000

csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSOIt could help to reduce the latency of the time-related functionsin user space.We have referenced arm's and riscv's implementation for the patch.Signed-off-by: Guo Ren Cc: Vincent Chen Cc: Arnd Bergmann List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile

87f3248c - csky: Reconstruct VDSO framework

Mon, 04 Jan 2021 03:37:07 +0000

csky: Reconstruct VDSO frameworkReconstruct vdso framework to support future vsyscall,vgettimeofday features. These are very important features to reducesystem calls into the kernel for performance improvement.The patch is reference RISC-V'sSigned-off-by: Guo Ren Cc: Palmer Dabbelt List of files: /linux-6.15/arch/csky/kernel/vdso/Makefile