user/sven/linux.git/tools/objtool/Makefile, branch v5.4.26

objtool: Fix ARCH=x86_64 build error

2020-02-24T07:36:55Z

[ Upstream commit 8580bed7e751e6d4f17881e059daf3cb37ba4717 ] Building objtool with ARCH=x86_64 fails with: $make ARCH=x86_64 -C tools/objtool ... CC arch/x86/decode.o arch/x86/decode.c:10:22: fatal error: asm/insn.h: No such file or directory #include ^ compilation terminated. mv: cannot stat ‘arch/x86/.decode.o.tmp’: No such file or directory make[2]: *** [arch/x86/decode.o] Error 1 ... The root cause is that the command-line variable 'ARCH' cannot be overridden. It can be replaced by 'SRCARCH', which is defined in 'tools/scripts/Makefile.arch'. Signed-off-by: Shile Zhang Signed-off-by: Josh Poimboeuf Signed-off-by: Ingo Molnar Reviewed-by: Kamalesh Babulal Link: https://lore.kernel.org/r/d5d11370ae116df6c653493acd300ec3d7f5e925.1579543924.git.jpoimboe@redhat.com Signed-off-by: Sasha Levin

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-09-17T00:06:21Z

Pull perf updates from Ingo Molnar: "Kernel side changes: - Improved kbprobes robustness - Intel PEBS support for PT hardware tracing - Other Intel PT improvements: high order pages memory footprint reduction and various related cleanups - Misc cleanups The perf tooling side has been very busy in this cycle, with over 300 commits. This is an incomplete high-level summary of the many improvements done by over 30 developers: - Lots of updates to the following tools: 'perf c2c' 'perf config' 'perf record' 'perf report' 'perf script' 'perf test' 'perf top' 'perf trace' - Updates to libperf and libtraceevent, and a consolidation of the proliferation of x86 instruction decoder libraries. - Vendor event updates for Intel and PowerPC CPUs, - Updates to hardware tracing tooling for ARM and Intel CPUs, - ... and lots of other changes and cleanups - see the shortlog and Git log for details" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (322 commits) kprobes: Prohibit probing on BUG() and WARN() address perf/x86: Make more stuff static x86, perf: Fix the dependency of the x86 insn decoder selftest objtool: Ignore intentional differences for the x86 insn decoder objtool: Update sync-check.sh from perf's check-headers.sh perf build: Ignore intentional differences for the x86 insn decoder perf intel-pt: Use shared x86 insn decoder perf intel-pt: Remove inat.c from build dependency list perf: Update .gitignore file objtool: Move x86 insn decoder to a common location perf metricgroup: Support multiple events for metricgroup perf metricgroup: Scale the metric result perf pmu: Change convert_scale from static to global perf symbols: Move mem_info and branch_info out of symbol.h perf auxtrace: Uninline functions that touch perf_session perf tools: Remove needless evlist.h include directives perf tools: Remove needless evlist.h include directives perf tools: Remove needless thread_map.h include directives perf tools: Remove needless thread.h include directives perf tools: Remove needless map.h include directives ...

objtool: Clobber user CFLAGS variable

2019-09-10T06:49:52Z

If the build user has the CFLAGS variable set in their environment, objtool blindly appends to it, which can cause unexpected behavior. Clobber CFLAGS to ensure consistent objtool compilation behavior. Reported-by: Valdis Kletnieks Tested-by: Valdis Kletnieks Signed-off-by: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: https://lkml.kernel.org/r/83a276df209962e6058fcb6c615eef9d401c21bc.1567121311.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar

objtool: Move x86 insn decoder to a common location

2019-09-01T01:27:52Z

The kernel tree has three identical copies of the x86 instruction decoder. Two of them are in the tools subdir. The tools subdir is supposed to be completely standalone and separate from the kernel. So having at least one copy of the kernel decoder in the tools subdir is unavoidable. However, we don't need *two* of them. Move objtool's copy of the decoder to a shared location, so that perf will also be able to use it. Signed-off-by: Josh Poimboeuf Reviewed-by: Masami Hiramatsu Acked-by: Peter Zijlstra (Intel) Cc: Adrian Hunter Cc: Jiri Olsa Cc: x86@kernel.org Link: http://lore.kernel.org/lkml/55b486b88f6bcd0c9a2a04b34f964860c8390ca8.1567118001.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo

objtool: Allow AR to be overridden with HOSTAR

2019-05-17T09:10:42Z

Currently, this Makefile hardcodes GNU ar, meaning that if it is not available, there is no way to supply a different one and the build will fail. $ make AR=llvm-ar CC=clang LD=ld.lld HOSTAR=llvm-ar HOSTCC=clang \ HOSTLD=ld.lld HOSTLDFLAGS=-fuse-ld=lld defconfig modules_prepare ... AR /out/tools/objtool/libsubcmd.a /bin/sh: 1: ar: not found ... Follow the logic of HOST{CC,LD} and allow the user to specify a different ar tool via HOSTAR (which is used elsewhere in other tools/ Makefiles). Signed-off-by: Nathan Chancellor Signed-off-by: Josh Poimboeuf Reviewed-by: Nick Desaulniers Reviewed-by: Mukesh Ojha Cc: Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/80822a9353926c38fd7a152991c6292491a9d0e8.1558028966.git.jpoimboe@redhat.com Link: https://github.com/ClangBuiltLinux/linux/issues/481 Signed-off-by: Ingo Molnar

objtool: Query pkg-config for libelf location

2019-03-28T12:32:01Z

If it is not in the default location, compilation fails at several points. Signed-off-by: Rolf Eike Beer Signed-off-by: Josh Poimboeuf Signed-off-by: Thomas Gleixner Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/91a25e992566a7968fedc89ec80e7f4c83ad0548.1553622500.git.jpoimboe@redhat.com

kbuild: Rename HOSTLDFLAGS to KBUILD_HOSTLDFLAGS

2018-07-17T16:18:05Z

In preparation for enabling command line LDFLAGS, re-name HOSTLDFLAGS to KBUILD_HOSTLDFLAGS as the internal use only flags. This should not have any visible effects. Signed-off-by: Laura Abbott Signed-off-by: Masahiro Yamada

kbuild: Rename HOSTCFLAGS to KBUILD_HOSTCFLAGS

2018-07-17T16:18:05Z

In preparation for enabling command line CFLAGS, re-name HOSTCFLAGS to KBUILD_HOSTCFLAGS as the internal use only flags. This should not have any visible effects. Signed-off-by: Laura Abbott Signed-off-by: Masahiro Yamada

objtool: Support HOSTCFLAGS and HOSTLDFLAGS

2018-04-17T05:59:42Z

It may be useful to compile host programs with different flags (e.g. hardening). Ensure that objtool picks up the appropriate flags. Signed-off-by: Laura Abbott Signed-off-by: Josh Poimboeuf Cc: Linus Torvalds Cc: Masahiro Yamada Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kbuild@vger.kernel.org Link: http://lkml.kernel.org/r/05a360681176f1423cb2fde8faae3a0a0261afc5.1523560825.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar

Kbuild: fix # escaping in .cmd files for future Make

2018-04-10T15:03:02Z

I tried building using a freshly built Make (4.2.1-69-g8a731d1), but already the objtool build broke with orc_dump.c: In function ‘orc_dump’: orc_dump.c:106:2: error: ‘elf_getshnum’ is deprecated [-Werror=deprecated-declarations] if (elf_getshdrnum(elf, &nr_sections)) { Turns out that with that new Make, the backslash was not removed, so cpp didn't see a #include directive, grep found nothing, and -DLIBELF_USE_DEPRECATED was wrongly put in CFLAGS. Now, that new Make behaviour is documented in their NEWS file: * WARNING: Backward-incompatibility! Number signs (#) appearing inside a macro reference or function invocation no longer introduce comments and should not be escaped with backslashes: thus a call such as: foo := $(shell echo '#') is legal. Previously the number sign needed to be escaped, for example: foo := $(shell echo '\#') Now this latter will resolve to "\#". If you want to write makefiles portable to both versions, assign the number sign to a variable: C := \# foo := $(shell echo '$C') This was claimed to be fixed in 3.81, but wasn't, for some reason. To detect this change search for 'nocomment' in the .FEATURES variable. This also fixes up the two make-cmd instances to replace # with $(pound) rather than with \#. There might very well be other places that need similar fixup in preparation for whatever future Make release contains the above change, but at least this builds an x86_64 defconfig with the new make. Link: https://bugzilla.kernel.org/show_bug.cgi?id=197847 Cc: Randy Dunlap Signed-off-by: Rasmus Villemoes Signed-off-by: Masahiro Yamada