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Proper support for parallel debuginfo and hardening flags

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This commit is contained in:
Laura Abbott 2018-07-12 12:40:31 -07:00
parent fbedc324c5
commit edd5e61032
32 changed files with 1068 additions and 3 deletions
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134
0001-kbuild-Add-build-salt-to-the-kernel-and-modules.patch Normal file
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@ -0,0 +1,134 @@
From 25d3cf21987c752240df03c050593621ed2bd3a3 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Tue, 3 Jul 2018 15:50:14 -0700
Subject: [PATCHv6 1/4] kbuild: Add build salt to the kernel and modules
To: Andy Lutomirski <luto@kernel.org>
To: mjw@fedoraproject.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
To: H. J. Lu <hjl.tools@gmail.com>
Cc: X86 ML <x86@kernel.org>
Cc: linux-kernel@vger.kernel.org
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nick Clifton <nickc@redhat.com>
Cc: Cary Coutant <ccoutant@gmail.com>
Cc: linux-kbuild@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
To: Michael Ellerman <mpe@ellerman.id.au>
To: Catalin Marinas <catalin.marinas@arm.com>
To: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
In Fedora, the debug information is packaged separately (foo-debuginfo) and
can be installed separately. There's been a long standing issue where only
one version of a debuginfo info package can be installed at a time. There's
been an effort for Fedora for parallel debuginfo to rectify this problem.
Part of the requirement to allow parallel debuginfo to work is that build ids
are unique between builds. The existing upstream rpm implementation ensures
this by re-calculating the build-id using the version and release as a
seed. This doesn't work 100% for the kernel because of the vDSO which is
its own binary and doesn't get updated when embedded.
Fix this by adding some data in an ELF note for both the kernel and modules.
The data is controlled via a Kconfig option so distributions can set it
to an appropriate value to ensure uniqueness between builds.
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v6: Added more detail to the commit text about why exactly this feature
is useful. Default string now ""
---
include/linux/build-salt.h | 20 ++++++++++++++++++++
init/Kconfig | 9 +++++++++
init/version.c | 3 +++
scripts/mod/modpost.c | 3 +++
4 files changed, 35 insertions(+)
create mode 100644 include/linux/build-salt.h
diff --git a/include/linux/build-salt.h b/include/linux/build-salt.h
new file mode 100644
index 000000000000..bb007bd05e7a
--- /dev/null
+++ b/include/linux/build-salt.h
@@ -0,0 +1,20 @@
+#ifndef __BUILD_SALT_H
+#define __BUILD_SALT_H
+
+#include <linux/elfnote.h>
+
+#define LINUX_ELFNOTE_BUILD_SALT 0x100
+
+#ifdef __ASSEMBLER__
+
+#define BUILD_SALT \
+ ELFNOTE(Linux, LINUX_ELFNOTE_BUILD_SALT, .asciz CONFIG_BUILD_SALT)
+
+#else
+
+#define BUILD_SALT \
+ ELFNOTE32("Linux", LINUX_ELFNOTE_BUILD_SALT, CONFIG_BUILD_SALT)
+
+#endif
+
+#endif /* __BUILD_SALT_H */
diff --git a/init/Kconfig b/init/Kconfig
index 041f3a022122..d39b31484c52 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -107,6 +107,15 @@ config LOCALVERSION_AUTO
which is done within the script "scripts/setlocalversion".)
+config BUILD_SALT
+ string "Build ID Salt"
+ default ""
+ help
+ The build ID is used to link binaries and their debug info. Setting
+ this option will use the value in the calculation of the build id.
+ This is mostly useful for distributions which want to ensure the
+ build is unique between builds. It's safe to leave the default.
+
config HAVE_KERNEL_GZIP
bool
diff --git a/init/version.c b/init/version.c
index bfb4e3f4955e..ef4012ec4375 100644
--- a/init/version.c
+++ b/init/version.c
@@ -7,6 +7,7 @@
*/
#include <generated/compile.h>
+#include <linux/build-salt.h>
#include <linux/export.h>
#include <linux/uts.h>
#include <linux/utsname.h>
@@ -49,3 +50,5 @@ const char linux_proc_banner[] =
"%s version %s"
" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
" (" LINUX_COMPILER ") %s\n";
+
+BUILD_SALT;
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 1663fb19343a..dc6d714e4dcb 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2125,10 +2125,13 @@ static int check_modname_len(struct module *mod)
**/
static void add_header(struct buffer *b, struct module *mod)
{
+ buf_printf(b, "#include <linux/build-salt.h>\n");
buf_printf(b, "#include <linux/module.h>\n");
buf_printf(b, "#include <linux/vermagic.h>\n");
buf_printf(b, "#include <linux/compiler.h>\n");
buf_printf(b, "\n");
+ buf_printf(b, "BUILD_SALT;\n");
+ buf_printf(b, "\n");
buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING);\n");
buf_printf(b, "MODULE_INFO(name, KBUILD_MODNAME);\n");
buf_printf(b, "\n");
--
2.17.1

50
0001-tools-build-Fixup-host-c-flags.patch Normal file
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@ -0,0 +1,50 @@
From b8c8dc142ff2f7f46060ed77b2de05c813233029 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Fri, 6 Jul 2018 17:11:31 -0700
Subject: [PATCHv2 1/7] tools: build: Fixup host c flags
To: Masahiro Yamada <yamada.masahiro@socionext.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Robin Jarry <robin.jarry@6wind.com>
Commit 0c3b7e42616f ("tools build: Add support for host programs format")
introduced host_c_flags which referenced CHOSTFLAGS. The actual name of the
variable is HOSTCFLAGS. Fix this up.
Fixes: 0c3b7e42616f ("tools build: Add support for host programs format")
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v2: Also fixed another instance in perf pmu-events.
---
tools/build/Build.include | 2 +-
tools/perf/pmu-events/Build | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/build/Build.include b/tools/build/Build.include
index a4bbb984941d..b5c679cd441c 100644
--- a/tools/build/Build.include
+++ b/tools/build/Build.include
@@ -98,4 +98,4 @@ cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXX
###
## HOSTCC C flags
-host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))
+host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(HOSTCFLAGS) -D"BUILD_STR(s)=\#s" $(HOSTCFLAGS_$(basetarget).o) $(HOSTCFLAGS_$(obj))
diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build
index 17783913d330..215ba30b8534 100644
--- a/tools/perf/pmu-events/Build
+++ b/tools/perf/pmu-events/Build
@@ -1,7 +1,7 @@
hostprogs := jevents
jevents-y += json.o jsmn.o jevents.o
-CHOSTFLAGS_jevents.o = -I$(srctree)/tools/include
+HOSTCFLAGS_jevents.o = -I$(srctree)/tools/include
pmu-events-y += pmu-events.o
JDIR = pmu-events/arch/$(SRCARCH)
JSON = $(shell [ -d $(JDIR) ] && \
--
2.17.1

38
0002-tools-build-Use-HOSTLDFLAGS-with-fixdep.patch Normal file
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@ -0,0 +1,38 @@
From b89f16785c9b5176c0af9b15eee74048daf95357 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Fri, 6 Jul 2018 17:42:05 -0700
Subject: [PATCHv2 2/7] tools: build: Use HOSTLDFLAGS with fixdep
To: Masahiro Yamada <yamada.masahiro@socionext.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Robin Jarry <robin.jarry@6wind.com>
The final link of fixdep uses LDFLAGS but not the existing HOSTLDFLAGS.
Fix this.
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v2: Switch to just using HOSTLDFLAGS instead of both LDFLAGS and
HOSTLDFLAGS.
---
tools/build/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/build/Makefile b/tools/build/Makefile
index 5eb4b5ad79cb..5edf65e684ab 100644
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -43,7 +43,7 @@ $(OUTPUT)fixdep-in.o: FORCE
$(Q)$(MAKE) $(build)=fixdep
$(OUTPUT)fixdep: $(OUTPUT)fixdep-in.o
- $(QUIET_LINK)$(HOSTCC) $(LDFLAGS) -o $@ $<
+ $(QUIET_LINK)$(HOSTCC) $(HOSTLDFLAGS) -o $@ $<
FORCE:
--
2.17.1

75
0002-x86-Add-build-salt-to-the-vDSO.patch Normal file
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@ -0,0 +1,75 @@
From 2199e4e9f81bd90ba82fcb8641a1a5911ac9c96b Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Tue, 3 Jul 2018 15:56:14 -0700
Subject: [PATCHv6 2/4] x86: Add build salt to the vDSO
To: Andy Lutomirski <luto@kernel.org>
To: mjw@fedoraproject.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
To: H. J. Lu <hjl.tools@gmail.com>
Cc: X86 ML <x86@kernel.org>
Cc: linux-kernel@vger.kernel.org
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nick Clifton <nickc@redhat.com>
Cc: Cary Coutant <ccoutant@gmail.com>
Cc: linux-kbuild@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
The vDSO needs to have a unique build id in a similar manner
to the kernel and modules. Use the build salt macro.
Acked-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v6: Ack from Andy
---
arch/x86/entry/vdso/vdso-note.S | 3 +++
arch/x86/entry/vdso/vdso32/note.S | 3 +++
2 files changed, 6 insertions(+)
diff --git a/arch/x86/entry/vdso/vdso-note.S b/arch/x86/entry/vdso/vdso-note.S
index 79a071e4357e..79423170118f 100644
--- a/arch/x86/entry/vdso/vdso-note.S
+++ b/arch/x86/entry/vdso/vdso-note.S
@@ -3,6 +3,7 @@
* Here we can supply some information useful to userland.
*/
+#include <linux/build-salt.h>
#include <linux/uts.h>
#include <linux/version.h>
#include <linux/elfnote.h>
@@ -10,3 +11,5 @@
ELFNOTE_START(Linux, 0, "a")
.long LINUX_VERSION_CODE
ELFNOTE_END
+
+BUILD_SALT
diff --git a/arch/x86/entry/vdso/vdso32/note.S b/arch/x86/entry/vdso/vdso32/note.S
index 9fd51f206314..e78047d119f6 100644
--- a/arch/x86/entry/vdso/vdso32/note.S
+++ b/arch/x86/entry/vdso/vdso32/note.S
@@ -4,6 +4,7 @@
* Here we can supply some information useful to userland.
*/
+#include <linux/build-salt.h>
#include <linux/version.h>
#include <linux/elfnote.h>
@@ -14,6 +15,8 @@ ELFNOTE_START(Linux, 0, "a")
.long LINUX_VERSION_CODE
ELFNOTE_END
+BUILD_SALT
+
#ifdef CONFIG_XEN
/*
* Add a special note telling glibc's dynamic linker a fake hardware
--
2.17.1

51
0003-powerpc-Add-build-salt-to-the-vDSO.patch Normal file
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@ -0,0 +1,51 @@
From e9bb20873f9dff73fc6f381e32b43f198974ed71 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Tue, 3 Jul 2018 15:59:53 -0700
Subject: [PATCHv6 3/4] powerpc: Add build salt to the vDSO
Cc: Andy Lutomirski <luto@kernel.org>
To: mjw@fedoraproject.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
To: H. J. Lu <hjl.tools@gmail.com>
Cc: X86 ML <x86@kernel.org>
Cc: linux-kernel@vger.kernel.org
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nick Clifton <nickc@redhat.com>
Cc: Cary Coutant <ccoutant@gmail.com>
Cc: linux-kbuild@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
The vDSO needs to have a unique build id in a similar manner
to the kernel and modules. Use the build salt macro.
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v6: Remove semi-colon
---
arch/powerpc/kernel/vdso32/note.S | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/kernel/vdso32/note.S b/arch/powerpc/kernel/vdso32/note.S
index d4b5be4f3d5f..227a7327399e 100644
--- a/arch/powerpc/kernel/vdso32/note.S
+++ b/arch/powerpc/kernel/vdso32/note.S
@@ -5,6 +5,7 @@
#include <linux/uts.h>
#include <linux/version.h>
+#include <linux/build-salt.h>
#define ASM_ELF_NOTE_BEGIN(name, flags, vendor, type) \
.section name, flags; \
@@ -23,3 +24,5 @@
ASM_ELF_NOTE_BEGIN(".note.kernel-version", "a", UTS_SYSNAME, 0)
.long LINUX_VERSION_CODE
ASM_ELF_NOTE_END
+
+BUILD_SALT
--
2.17.1

150
0003-treewide-Rename-HOSTCFLAGS-KBUILD_HOSTCFLAGS.patch Normal file
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@ -0,0 +1,150 @@
From af0b06e726242516da9df5071e4e058f949f2240 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Thu, 5 Jul 2018 14:39:20 -0700
Subject: [PATCHv2] treewide: Rename HOSTCFLAGS -> KBUILD_HOSTCFLAGS
To: Masahiro Yamada <yamada.masahiro@socionext.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Robin Jarry <robin.jarry@6wind.com>
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 <labbott@redhat.com>
---
v2: Dropped name change for individual files (still CHOSTFLAGS_foo)
---
Makefile | 4 ++--
arch/alpha/boot/Makefile | 2 +-
net/bpfilter/Makefile | 2 +-
samples/bpf/Makefile | 10 +++++-----
scripts/Kbuild.include | 2 +-
scripts/Makefile.host | 2 +-
tools/build/Build.include | 2 +-
tools/objtool/Makefile | 2 +-
8 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/Makefile b/Makefile
index 925c55f2524f..1feec222f3c1 100644
--- a/Makefile
+++ b/Makefile
@@ -359,7 +359,7 @@ HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
HOSTCC = gcc
HOSTCXX = g++
-HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
+KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
@@ -429,7 +429,7 @@ KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
LDFLAGS :=
GCC_PLUGINS_CFLAGS :=
-export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
+export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
diff --git a/arch/alpha/boot/Makefile b/arch/alpha/boot/Makefile
index 0cbe4c59d3ce..dfccf0195306 100644
--- a/arch/alpha/boot/Makefile
+++ b/arch/alpha/boot/Makefile
@@ -14,7 +14,7 @@ targets := vmlinux.gz vmlinux \
tools/bootpzh bootloader bootpheader bootpzheader
OBJSTRIP := $(obj)/tools/objstrip
-HOSTCFLAGS := -Wall -I$(objtree)/usr/include
+KBUILD_HOSTCFLAGS := -Wall -I$(objtree)/usr/include
BOOTCFLAGS += -I$(objtree)/$(obj) -I$(srctree)/$(obj)
# SRM bootable image. Copy to offset 512 of a partition.
diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile
index 39c6980b5d99..70beeb4ad806 100644
--- a/net/bpfilter/Makefile
+++ b/net/bpfilter/Makefile
@@ -5,7 +5,7 @@
hostprogs-y := bpfilter_umh
bpfilter_umh-objs := main.o
-HOSTCFLAGS += -I. -Itools/include/ -Itools/include/uapi
+KBUILD_HOSTCFLAGS += -I. -Itools/include/ -Itools/include/uapi
HOSTCC := $(CC)
ifeq ($(CONFIG_BPFILTER_UMH), y)
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 1303af10e54d..494ef04c56cc 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -164,11 +164,11 @@ always += xdpsock_kern.o
always += xdp_fwd_kern.o
always += task_fd_query_kern.o
-HOSTCFLAGS += -I$(objtree)/usr/include
-HOSTCFLAGS += -I$(srctree)/tools/lib/
-HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
-HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
-HOSTCFLAGS += -I$(srctree)/tools/perf
+KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include
+KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/
+KBUILD_HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
+KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
+KBUILD_HOSTCFLAGS += -I$(srctree)/tools/perf
HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
HOSTCFLAGS_trace_helpers.o += -I$(srctree)/tools/lib/bpf/
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index c8156d61678c..827344dfb185 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -126,7 +126,7 @@ cc-option = $(call __cc-option, $(CC),\
# hostcc-option
# Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586)
hostcc-option = $(call __cc-option, $(HOSTCC),\
- $(HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2))
+ $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2))
# cc-option-yn
# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index aa971cc3f339..09f00dae21fe 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -62,7 +62,7 @@ host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs))
#####
# Handle options to gcc. Support building with separate output directory
-_hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
+_hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
$(HOSTCFLAGS_$(basetarget).o)
_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
$(HOSTCXXFLAGS_$(basetarget).o)
diff --git a/tools/build/Build.include b/tools/build/Build.include
index b5c679cd441c..a75fa0b6ffc0 100644
--- a/tools/build/Build.include
+++ b/tools/build/Build.include
@@ -98,4 +98,4 @@ cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXX
###
## HOSTCC C flags
-host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(HOSTCFLAGS) -D"BUILD_STR(s)=\#s" $(HOSTCFLAGS_$(basetarget).o) $(HOSTCFLAGS_$(obj))
+host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(KBUILD_HOSTCFLAGS) -D"BUILD_STR(s)=\#s" $(HOSTCFLAGS_$(basetarget).o) $(HOSTCFLAGS_$(obj))
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index f76d9914686a..b5d8c2964b52 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -31,7 +31,7 @@ INCLUDES := -I$(srctree)/tools/include \
-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
-I$(srctree)/tools/objtool/arch/$(ARCH)/include
WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
-CFLAGS += -Werror $(WARNINGS) $(HOSTCFLAGS) -g $(INCLUDES)
+CFLAGS += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES)
LDFLAGS += -lelf $(LIBSUBCMD) $(HOSTLDFLAGS)
# Allow old libelf to be used:
--
2.17.1

49
0004-arm64-Add-build-salt-to-the-vDSO.patch Normal file
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@ -0,0 +1,49 @@
From de9537aca25d53d9b44e7ec9a9952ebd77d69cd1 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Tue, 3 Jul 2018 16:01:24 -0700
Subject: [PATCHv6 4/4] arm64: Add build salt to the vDSO
Cc: Andy Lutomirski <luto@kernel.org>
To: mjw@fedoraproject.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
To: H. J. Lu <hjl.tools@gmail.com>
Cc: X86 ML <x86@kernel.org>
Cc: linux-kernel@vger.kernel.org
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nick Clifton <nickc@redhat.com>
Cc: Cary Coutant <ccoutant@gmail.com>
Cc: linux-kbuild@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Michael Ellerman <mpe@ellerman.id.au>
To: Catalin Marinas <catalin.marinas@arm.com>
To: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
The vDSO needs to have a unique build id in a similar manner
to the kernel and modules. Use the build salt macro.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v6: Remove the semi-colon, Ack from Will
---
arch/arm64/kernel/vdso/note.S | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/kernel/vdso/note.S b/arch/arm64/kernel/vdso/note.S
index b82c85e5d972..e20483b104d9 100644
--- a/arch/arm64/kernel/vdso/note.S
+++ b/arch/arm64/kernel/vdso/note.S
@@ -22,7 +22,10 @@
#include <linux/uts.h>
#include <linux/version.h>
#include <linux/elfnote.h>
+#include <linux/build-salt.h>
ELFNOTE_START(Linux, 0, "a")
.long LINUX_VERSION_CODE
ELFNOTE_END
+
+BUILD_SALT
--
2.17.1

61
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@ -0,0 +1,61 @@
From a6faf06c7da9ea06ca23c3a50215860f5d83b3bd Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Thu, 5 Jul 2018 14:43:37 -0700
Subject: [PATCHv2 4/7] treewide: Rename HOSTCXXFLAGS to KBUILD_HOSTCXXFLAGS
To: Masahiro Yamada <yamada.masahiro@socionext.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Robin Jarry <robin.jarry@6wind.com>
In preparation for enabling command line CXXFLAGS, re-name HOSTCXXFLAGS to
KBUILD_HOSTCXXFLAGS as the internal use only flags. This should not have any
visible effects.
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v2: Dropped name change for individual files (still HOSTCXXFLAGS_foo)
---
Makefile | 4 ++--
scripts/Makefile.host | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/Makefile b/Makefile
index 1feec222f3c1..857ccd28dc36 100644
--- a/Makefile
+++ b/Makefile
@@ -361,7 +361,7 @@ HOSTCC = gcc
HOSTCXX = g++
KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
-HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
+KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
HOST_LOADLIBES := $(HOST_LFS_LIBS)
@@ -432,7 +432,7 @@ GCC_PLUGINS_CFLAGS :=
export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
-export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
+export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 09f00dae21fe..455d85aa1d37 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -64,7 +64,7 @@ host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs))
_hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
$(HOSTCFLAGS_$(basetarget).o)
-_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
+_hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
$(HOSTCXXFLAGS_$(basetarget).o)
ifeq ($(KBUILD_SRC),)
--
2.17.1

139
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@ -0,0 +1,139 @@
From 017d1ce33501da9e3e438066d853a874df64f1a5 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Thu, 5 Jul 2018 14:45:52 -0700
Subject: [PATCHv2 5/7] treewide: Rename HOSTLDFLAGS to KBUILD_HOSTLDFLAGS
To: Masahiro Yamada <yamada.masahiro@socionext.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Robin Jarry <robin.jarry@6wind.com>
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 <labbott@redhat.com>
---
v2: No change
---
Makefile | 4 ++--
net/bpfilter/Makefile | 2 +-
scripts/Makefile.host | 10 +++++-----
tools/build/Makefile | 2 +-
tools/objtool/Makefile | 2 +-
5 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/Makefile b/Makefile
index 857ccd28dc36..bd2d64b89463 100644
--- a/Makefile
+++ b/Makefile
@@ -362,7 +362,7 @@ HOSTCXX = g++
KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
-HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
+KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
HOST_LOADLIBES := $(HOST_LFS_LIBS)
# Make variables (CC, etc...)
@@ -430,7 +430,7 @@ LDFLAGS :=
GCC_PLUGINS_CFLAGS :=
export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
-export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
+export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS HOST_LOADLIBES
export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile
index 70beeb4ad806..0947ee7f70d5 100644
--- a/net/bpfilter/Makefile
+++ b/net/bpfilter/Makefile
@@ -12,7 +12,7 @@ ifeq ($(CONFIG_BPFILTER_UMH), y)
# builtin bpfilter_umh should be compiled with -static
# since rootfs isn't mounted at the time of __init
# function is called and do_execv won't find elf interpreter
-HOSTLDFLAGS += -static
+KBUILD_HOSTLDFLAGS += -static
endif
$(obj)/bpfilter_umh_blob.o: $(obj)/bpfilter_umh
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 455d85aa1d37..c019d781b2c9 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -84,7 +84,7 @@ hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
# Create executable from a single .c file
# host-csingle -> Executable
quiet_cmd_host-csingle = HOSTCC $@
- cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(HOSTLDFLAGS) -o $@ $< \
+ cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-csingle): $(obj)/%: $(src)/%.c FORCE
$(call if_changed_dep,host-csingle)
@@ -92,7 +92,7 @@ $(host-csingle): $(obj)/%: $(src)/%.c FORCE
# Link an executable based on list of .o files, all plain c
# host-cmulti -> executable
quiet_cmd_host-cmulti = HOSTLD $@
- cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
+ cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
$(addprefix $(obj)/,$($(@F)-objs)) \
$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-cmulti): FORCE
@@ -109,7 +109,7 @@ $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
# Link an executable based on list of .o files, a mixture of .c and .cc
# host-cxxmulti -> executable
quiet_cmd_host-cxxmulti = HOSTLD $@
- cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
+ cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
$(foreach o,objs cxxobjs,\
$(addprefix $(obj)/,$($(@F)-$(o)))) \
$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
@@ -143,7 +143,7 @@ $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
# Link a shared library, based on position independent .o files
# *.o -> .so shared library (host-cshlib)
quiet_cmd_host-cshlib = HOSTLLD -shared $@
- cmd_host-cshlib = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
+ cmd_host-cshlib = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
$(addprefix $(obj)/,$($(@F:.so=-objs))) \
$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-cshlib): FORCE
@@ -153,7 +153,7 @@ $(call multi_depend, $(host-cshlib), .so, -objs)
# Link a shared library, based on position independent .o files
# *.o -> .so shared library (host-cxxshlib)
quiet_cmd_host-cxxshlib = HOSTLLD -shared $@
- cmd_host-cxxshlib = $(HOSTCXX) $(HOSTLDFLAGS) -shared -o $@ \
+ cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
$(addprefix $(obj)/,$($(@F:.so=-objs))) \
$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-cxxshlib): FORCE
diff --git a/tools/build/Makefile b/tools/build/Makefile
index 5edf65e684ab..727050c40f09 100644
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -43,7 +43,7 @@ $(OUTPUT)fixdep-in.o: FORCE
$(Q)$(MAKE) $(build)=fixdep
$(OUTPUT)fixdep: $(OUTPUT)fixdep-in.o
- $(QUIET_LINK)$(HOSTCC) $(HOSTLDFLAGS) -o $@ $<
+ $(QUIET_LINK)$(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ $<
FORCE:
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index b5d8c2964b52..c9d038f91af6 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -32,7 +32,7 @@ INCLUDES := -I$(srctree)/tools/include \
-I$(srctree)/tools/objtool/arch/$(ARCH)/include
WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
CFLAGS += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES)
-LDFLAGS += -lelf $(LIBSUBCMD) $(HOSTLDFLAGS)
+LDFLAGS += -lelf $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
# Allow old libelf to be used:
elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
--
2.17.1

188
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@ -0,0 +1,188 @@
From b7e46c634a6a8b5a40369b70f1f6e0bf21fd8c22 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Thu, 5 Jul 2018 15:01:07 -0700
Subject: [PATCH] treewide: Rename HOST_LOADLIBES to KBUILD_HOSTLDLIBS
In preparation for enabling command line LDLIBS, re-name HOST_LOADLIBES to
KBUILD_HOSTLDLIBS as the internal use only flags. Also rename existing usage
to HOSTLDLIBS for consistency. This should not have any visible effects.
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
Makefile | 4 ++--
samples/bpf/Makefile | 12 ++++++------
samples/seccomp/Makefile | 6 +++---
scripts/Makefile | 4 ++--
scripts/Makefile.host | 10 +++++-----
scripts/kconfig/Makefile | 8 ++++----
6 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/Makefile b/Makefile
index bd2d64b89463..96e34381d9ee 100644
--- a/Makefile
+++ b/Makefile
@@ -363,7 +363,7 @@ KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
-HOST_LOADLIBES := $(HOST_LFS_LIBS)
+KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS)
# Make variables (CC, etc...)
AS = $(CROSS_COMPILE)as
@@ -430,7 +430,7 @@ LDFLAGS :=
GCC_PLUGINS_CFLAGS :=
export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
-export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS HOST_LOADLIBES
+export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 494ef04c56cc..bd9f6c2a808e 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -180,12 +180,12 @@ HOSTCFLAGS_trace_event_user.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_sampleip_user.o += -I$(srctree)/tools/lib/bpf/
HOSTCFLAGS_task_fd_query_user.o += -I$(srctree)/tools/lib/bpf/
-HOST_LOADLIBES += $(LIBBPF) -lelf
-HOSTLOADLIBES_tracex4 += -lrt
-HOSTLOADLIBES_trace_output += -lrt
-HOSTLOADLIBES_map_perf_test += -lrt
-HOSTLOADLIBES_test_overhead += -lrt
-HOSTLOADLIBES_xdpsock += -pthread
+KBUILD_HOSTLDLIBS += $(LIBBPF) -lelf
+HOSTLDLIBS_tracex4 += -lrt
+HOSTLDLIBS_trace_output += -lrt
+HOSTLDLIBS_map_perf_test += -lrt
+HOSTLDLIBS_test_overhead += -lrt
+HOSTLDLIBS_xdpsock += -pthread
# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
# make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
diff --git a/samples/seccomp/Makefile b/samples/seccomp/Makefile
index ba942e3ead89..cf34ff6b4065 100644
--- a/samples/seccomp/Makefile
+++ b/samples/seccomp/Makefile
@@ -30,9 +30,9 @@ HOSTCFLAGS_bpf-direct.o += $(MFLAG)
HOSTCFLAGS_dropper.o += $(MFLAG)
HOSTCFLAGS_bpf-helper.o += $(MFLAG)
HOSTCFLAGS_bpf-fancy.o += $(MFLAG)
-HOSTLOADLIBES_bpf-direct += $(MFLAG)
-HOSTLOADLIBES_bpf-fancy += $(MFLAG)
-HOSTLOADLIBES_dropper += $(MFLAG)
+HOSTLDLIBS_bpf-direct += $(MFLAG)
+HOSTLDLIBS_bpf-fancy += $(MFLAG)
+HOSTLDLIBS_dropper += $(MFLAG)
endif
always := $(hostprogs-m)
endif
diff --git a/scripts/Makefile b/scripts/Makefile
index 25ab143cbe14..166b94db90e3 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -22,8 +22,8 @@ hostprogs-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
HOSTCFLAGS_sortextable.o = -I$(srctree)/tools/include
HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
-HOSTLOADLIBES_sign-file = -lcrypto
-HOSTLOADLIBES_extract-cert = -lcrypto
+HOSTLDLIBS_sign-file = -lcrypto
+HOSTLDLIBS_extract-cert = -lcrypto
always := $(hostprogs-y) $(hostprogs-m)
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index c019d781b2c9..0393f75db4d4 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -85,7 +85,7 @@ hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
# host-csingle -> Executable
quiet_cmd_host-csingle = HOSTCC $@
cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
- $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
+ $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
$(host-csingle): $(obj)/%: $(src)/%.c FORCE
$(call if_changed_dep,host-csingle)
@@ -94,7 +94,7 @@ $(host-csingle): $(obj)/%: $(src)/%.c FORCE
quiet_cmd_host-cmulti = HOSTLD $@
cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
$(addprefix $(obj)/,$($(@F)-objs)) \
- $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
+ $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
$(host-cmulti): FORCE
$(call if_changed,host-cmulti)
$(call multi_depend, $(host-cmulti), , -objs)
@@ -112,7 +112,7 @@ quiet_cmd_host-cxxmulti = HOSTLD $@
cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
$(foreach o,objs cxxobjs,\
$(addprefix $(obj)/,$($(@F)-$(o)))) \
- $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
+ $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
$(host-cxxmulti): FORCE
$(call if_changed,host-cxxmulti)
$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
@@ -145,7 +145,7 @@ $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
quiet_cmd_host-cshlib = HOSTLLD -shared $@
cmd_host-cshlib = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
$(addprefix $(obj)/,$($(@F:.so=-objs))) \
- $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
+ $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
$(host-cshlib): FORCE
$(call if_changed,host-cshlib)
$(call multi_depend, $(host-cshlib), .so, -objs)
@@ -155,7 +155,7 @@ $(call multi_depend, $(host-cshlib), .so, -objs)
quiet_cmd_host-cxxshlib = HOSTLLD -shared $@
cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
$(addprefix $(obj)/,$($(@F:.so=-objs))) \
- $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
+ $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
$(host-cxxshlib): FORCE
$(call if_changed,host-cxxshlib)
$(call multi_depend, $(host-cxxshlib), .so, -objs)
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index a3ac2c91331c..8f283acdaa4d 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -169,7 +169,7 @@ HOSTCFLAGS_zconf.tab.o := -I$(src)
hostprogs-y += nconf
nconf-objs := nconf.o zconf.tab.o nconf.gui.o
-HOSTLOADLIBES_nconf = $(shell . $(obj)/.nconf-cfg && echo $$libs)
+HOSTLDLIBS_nconf = $(shell . $(obj)/.nconf-cfg && echo $$libs)
HOSTCFLAGS_nconf.o = $(shell . $(obj)/.nconf-cfg && echo $$cflags)
HOSTCFLAGS_nconf.gui.o = $(shell . $(obj)/.nconf-cfg && echo $$cflags)
@@ -180,7 +180,7 @@ hostprogs-y += mconf
lxdialog := checklist.o inputbox.o menubox.o textbox.o util.o yesno.o
mconf-objs := mconf.o zconf.tab.o $(addprefix lxdialog/, $(lxdialog))
-HOSTLOADLIBES_mconf = $(shell . $(obj)/.mconf-cfg && echo $$libs)
+HOSTLDLIBS_mconf = $(shell . $(obj)/.mconf-cfg && echo $$libs)
$(foreach f, mconf.o $(lxdialog), \
$(eval HOSTCFLAGS_$f = $$(shell . $(obj)/.mconf-cfg && echo $$$$cflags)))
@@ -191,7 +191,7 @@ hostprogs-y += qconf
qconf-cxxobjs := qconf.o
qconf-objs := zconf.tab.o
-HOSTLOADLIBES_qconf = $(shell . $(obj)/.qconf-cfg && echo $$libs)
+HOSTLDLIBS_qconf = $(shell . $(obj)/.qconf-cfg && echo $$libs)
HOSTCXXFLAGS_qconf.o = $(shell . $(obj)/.qconf-cfg && echo $$cflags)
$(obj)/qconf.o: $(obj)/.qconf-cfg $(obj)/qconf.moc
@@ -206,7 +206,7 @@ $(obj)/%.moc: $(src)/%.h $(obj)/.qconf-cfg
hostprogs-y += gconf
gconf-objs := gconf.o zconf.tab.o
-HOSTLOADLIBES_gconf = $(shell . $(obj)/.gconf-cfg && echo $$libs)
+HOSTLDLIBS_gconf = $(shell . $(obj)/.gconf-cfg && echo $$libs)
HOSTCFLAGS_gconf.o = $(shell . $(obj)/.gconf-cfg && echo $$cflags)
$(obj)/gconf.o: $(obj)/.gconf-cfg
--
2.17.1

73
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View File

@ -0,0 +1,73 @@
From 36be6e2f197b4abaf0e7c4fe2f525eb56b3f0298 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Fri, 6 Jul 2018 17:21:01 -0700
Subject: [PATCHv2 7/7] Kbuild: Use HOST*FLAGS options from the command line
To: Masahiro Yamada <yamada.masahiro@socionext.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Robin Jarry <robin.jarry@6wind.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Now that we have the rename in place, reuse the HOST*FLAGS options as
something that can be set from the command line and included with the
rest of the flags.
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v2: Use the correct name for HOSTLDLIBS, update documentation.
---
Documentation/kbuild/kbuild.txt | 16 ++++++++++++++++
Makefile | 9 +++++----
2 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 6c9c69ec3986..9847a5974826 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -238,3 +238,19 @@ KBUILD_VMLINUX_LIBS
All .a "lib" files for vmlinux.
KBUILD_VMLINUX_INIT, KBUILD_VMLINUX_MAIN, and KBUILD_VMLINUX_LIBS together
specify all the object files used to link vmlinux.
+
+HOSTCFLAGS
+--------------------------------------------------
+Additional flags to be passed to $(HOSTCC) when building host programs.
+
+HOSTLDFLAGS
+--------------------------------------------------
+Additional flags to be passed to $(HOSTLD) when building host programs.
+
+HOSTCXXFLAGS
+--------------------------------------------------
+Additional flags to be passed to $(HOSTCXX) when building host programs.
+
+HOSTLDLIBS
+--------------------------------------------------
+Additional libraries to link against when building host programs.
diff --git a/Makefile b/Makefile
index 96e34381d9ee..c2ee1d4c12c9 100644
--- a/Makefile
+++ b/Makefile
@@ -360,10 +360,11 @@ HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
HOSTCC = gcc
HOSTCXX = g++
KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
- -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
-KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
-KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
-KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS)
+ -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
+ $(HOSTCFLAGS)
+KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
+KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
+KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
# Make variables (CC, etc...)
AS = $(CROSS_COMPILE)as
--
2.17.1

1
configs/fedora/generic/CONFIG_BUILD_SALT Normal file
View File

@ -0,0 +1 @@
CONFIG_BUILD_SALT=""

1
kernel-aarch64-debug.config
View File

@ -751,6 +751,7 @@ CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUG=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHE_FEROCEON_L2 is not set
# CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH is not set

1
kernel-aarch64.config
View File

@ -751,6 +751,7 @@ CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUG=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHE_FEROCEON_L2 is not set
# CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH is not set

1
kernel-armv7hl-debug.config
View File

@ -786,6 +786,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHE_FEROCEON_L2 is not set
# CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH is not set

1
kernel-armv7hl-lpae-debug.config
View File

@ -760,6 +760,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHE_FEROCEON_L2 is not set
# CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH is not set

1
kernel-armv7hl-lpae.config
View File

@ -759,6 +759,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHE_FEROCEON_L2 is not set
# CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH is not set

1
kernel-armv7hl.config
View File

@ -785,6 +785,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHE_FEROCEON_L2 is not set
# CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH is not set

1
kernel-i686-PAE.config
View File

@ -636,6 +636,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
CONFIG_BXT_WC_PMIC_OPREGION=y
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set

1
kernel-i686-PAEdebug.config
View File

@ -639,6 +639,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
CONFIG_BXT_WC_PMIC_OPREGION=y
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set

1
kernel-i686-debug.config
View File

@ -639,6 +639,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
CONFIG_BXT_WC_PMIC_OPREGION=y
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set

1
kernel-i686.config
View File

@ -636,6 +636,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
CONFIG_BXT_WC_PMIC_OPREGION=y
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set

1
kernel-ppc64-debug.config
View File

@ -623,6 +623,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set
# CONFIG_CACHEFILES_HISTOGRAM is not set

1
kernel-ppc64.config
View File

@ -620,6 +620,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set
# CONFIG_CACHEFILES_HISTOGRAM is not set

1
kernel-ppc64le-debug.config
View File

@ -579,6 +579,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set
# CONFIG_CACHEFILES_HISTOGRAM is not set

1
kernel-ppc64le.config
View File

@ -576,6 +576,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set
# CONFIG_CACHEFILES_HISTOGRAM is not set

1
kernel-s390x-debug.config
View File

@ -580,6 +580,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set
# CONFIG_CACHEFILES_HISTOGRAM is not set

1
kernel-s390x.config
View File

@ -577,6 +577,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set
# CONFIG_CACHEFILES_HISTOGRAM is not set

1
kernel-x86_64-debug.config
View File

@ -651,6 +651,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
CONFIG_BXT_WC_PMIC_OPREGION=y
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set

1
kernel-x86_64.config
View File

@ -648,6 +648,7 @@ CONFIG_BT_WILINK=m
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_BUILD_DOCSRC=y
CONFIG_BUILD_ID_SALT=0x12345678
CONFIG_BUILD_SALT=""
CONFIG_BXT_WC_PMIC_OPREGION=y
# CONFIG_C2PORT is not set
# CONFIG_CACHEFILES_DEBUG is not set

42
kernel.spec
View File

@ -610,6 +610,21 @@ Patch504: kexec-bzimage-verify-pe-signature-fix.patch
# arm64 compile fix
Patch505: 0001-Revert-arm64-Use-aarch64elf-and-aarch64elfb-emulatio.patch
# Support for unique build ids
# All queued in the kbuild tree
Patch506: 0001-kbuild-Add-build-salt-to-the-kernel-and-modules.patch
Patch507: 0002-x86-Add-build-salt-to-the-vDSO.patch
Patch508: 0003-powerpc-Add-build-salt-to-the-vDSO.patch
Patch509: 0004-arm64-Add-build-salt-to-the-vDSO.patch
Patch510: 0001-tools-build-Fixup-host-c-flags.patch
Patch511: 0002-tools-build-Use-HOSTLDFLAGS-with-fixdep.patch
Patch512: 0003-treewide-Rename-HOSTCFLAGS-KBUILD_HOSTCFLAGS.patch
Patch513: 0004-treewide-Rename-HOSTCXXFLAGS-to-KBUILD_HOSTCXXFLAGS.patch
Patch514: 0005-treewide-Rename-HOSTLDFLAGS-to-KBUILD_HOSTLDFLAGS.patch
Patch515: 0006-treewide-Rename-HOST_LOADLIBES-to-KBUILD_HOSTLDLIBS.patch
Patch516: 0007-Kbuild-Use-HOST-FLAGS-options-from-the-command-line.patch
# END OF PATCH DEFINITIONS
%endif
@ -1171,6 +1186,21 @@ cp_vmlinux()
eu-strip --remove-comment -o "$2" "$1"
}
# These are for host programs that get built as part of the kernel and
# are required to be packaged in kernel-devel for building external modules.
# Since they are userspace binaries, they are required to pickup the hardening
# flags defined in the macros. The --build-id=uuid is a trick to get around
# debuginfo limitations: Typically, find-debuginfo.sh will update the build
# id of all binaries to allow for parllel debuginfo installs. The kernel
# can't use this because it breaks debuginfo for the vDSO so we have to
# use a special mechanism for kernel and modules to be unique. Unfortunately,
# we still have userspace binaries which need unique debuginfo and because
# they come from the kernel package, we can't just use find-debuginfo.sh to
# rewrite only those binaries. The easiest option right now is just to have
# the build id be a uuid for the host programs.
%define build_hostcflags %{build_cflags}
%define build_hostldflags %{build_ldflags} -Wl,--build-id=uuid
BuildKernel() {
MakeTarget=$1
KernelImage=$2
@ -1221,9 +1251,12 @@ BuildKernel() {
Arch=`head -1 .config | cut -b 3-`
echo USING ARCH=$Arch
make %{?make_opts} ARCH=$Arch olddefconfig >/dev/null
%{make} %{?make_opts} ARCH=$Arch %{?_smp_mflags} $MakeTarget %{?sparse_mflags} %{?kernel_mflags}
%{make} %{?make_opts} ARCH=$Arch %{?_smp_mflags} modules %{?sparse_mflags} || exit 1
make %{?make_opts} HOSTCFLAGS="%{build_hostcflags}" HOSTLDFLAGS="%{build_hostldflags}" ARCH=$Arch olddefconfig
# This ensures build-ids are unique to allow parallel debuginfo
perl -p -i -e "s/^CONFIG_BUILD_SALT.*/CONFIG_BUILD_SALT=\"%{KVERREL}\"/" .config
%{make} %{?make_opts} HOSTCFLAGS="%{build_hostcflags}" HOSTLDFLAGS="%{build_hostldflags}" ARCH=$Arch %{?_smp_mflags} $MakeTarget %{?sparse_mflags} %{?kernel_mflags}
%{make} %{?make_opts} HOSTCFLAGS="%{build_hostcflags}" HOSTLDFLAGS="%{build_hostldflags}" ARCH=$Arch %{?_smp_mflags} modules %{?sparse_mflags} || exit 1
mkdir -p $RPM_BUILD_ROOT/%{image_install_path}
mkdir -p $RPM_BUILD_ROOT/lib/modules/$KernelVer
@ -1845,6 +1878,9 @@ fi
#
#
%changelog
* Thu Jul 12 2018 Laura Abbott <labbott@redhat.com>
- Proper support for parallel debuginfo and hardening flags
* Thu Jul 12 2018 Javier Martinez Canillas <javierm@redhat.com>
- Drop the id field from generated BLS snippets

2
rebase-notes.txt
View File

@ -1,5 +1,7 @@
Linux 4.18 rebase notes:
- Turn off CONFIG_BCM2835_VCHIQ
- Drop build-id/hardening flags patches and changes
Linux 4.17 rebase notes:
- Turn off MTD + JFFS2 + extra infiniband options