From: Thomas Garnier <thgarnie@google.com>
To: Herbert Xu <herbert@gondor.apana.org.au>,
"David S . Miller" <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Thomas Garnier <thgarnie@google.com>,
Arnd Bergmann <arnd@arndb.de>, Kees Cook <keescook@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Andy Lutomirski <luto@kernel.org>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Borislav Petkov <bp@suse.de>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Juergen Gross <jgross@suse.com>,
Chris Wright <chrisw@sous-sol.org>,
Alok Kataria <akataria@vmware.com>,
Rusty Russell <rusty@rustcorp.com.au>, Tejun Heo <tj@kernel.org>,
Christoph Lameter <cl@linux.
Cc: x86@kernel.org, linux-crypto@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
virtualization@lists.linux-foundation.org,
xen-devel@lists.xenproject.org, linux-arch@vger.kernel.org,
linux-sparse@vger.kernel.org, kvm@vger.kernel.org,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com
Subject: x86: PIE support and option to extend KASLR randomization
Date: Wed, 4 Oct 2017 14:19:36 -0700 [thread overview]
Message-ID: <20171004212003.28296-1-thgarnie@google.com> (raw)
These patches make the changes necessary to build the kernel as Position
Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below
the top 2G of the virtual address space. It allows to optionally extend the
KASLR randomization range from 1G to 3G.
Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler
changes, PIE support and KASLR in general. Thanks to Roland McGrath on his
feedback for using -pie versus --emit-relocs and details on compiler code
generation.
The patches:
- 1-3, 5-1#, 17-18: Change in assembly code to be PIE compliant.
- 4: Add a new _ASM_GET_PTR macro to fetch a symbol address generically.
- 14: Adapt percpu design to work correctly when PIE is enabled.
- 15: Provide an option to default visibility to hidden except for key symbols.
It removes errors between compilation units.
- 16: Adapt relocation tool to handle PIE binary correctly.
- 19: Add support for global cookie.
- 20: Support ftrace with PIE (used on Ubuntu config).
- 21: Fix incorrect address marker on dump_pagetables.
- 22: Add option to move the module section just after the kernel.
- 23: Adapt module loading to support PIE with dynamic GOT.
- 24: Make the GOT read-only.
- 25: Add the CONFIG_X86_PIE option (off by default).
- 26: Adapt relocation tool to generate a 64-bit relocation table.
- 27: Add the CONFIG_RANDOMIZE_BASE_LARGE option to increase relocation range
from 1G to 3G (off by default).
Performance/Size impact:
Size of vmlinux (Default configuration):
File size:
- PIE disabled: +0.000031%
- PIE enabled: -3.210% (less relocations)
.text section:
- PIE disabled: +0.000644%
- PIE enabled: +0.837%
Size of vmlinux (Ubuntu configuration):
File size:
- PIE disabled: -0.201%
- PIE enabled: -0.082%
.text section:
- PIE disabled: same
- PIE enabled: +1.319%
Size of vmlinux (Default configuration + ORC):
File size:
- PIE enabled: -3.167%
.text section:
- PIE enabled: +0.814%
Size of vmlinux (Ubuntu configuration + ORC):
File size:
- PIE enabled: -3.167%
.text section:
- PIE enabled: +1.26%
The size increase is mainly due to not having access to the 32-bit signed
relocation that can be used with mcmodel=kernel. A small part is due to reduced
optimization for PIE code. This bug [1] was opened with gcc to provide a better
code generation for kernel PIE.
Hackbench (50% and 1600% on thread/process for pipe/sockets):
- PIE disabled: no significant change (avg +0.1% on latest test).
- PIE enabled: between -0.50% to +0.86% in average (default and Ubuntu config).
slab_test (average of 10 runs):
- PIE disabled: no significant change (-2% on latest run, likely noise).
- PIE enabled: between -1% and +0.8% on latest runs.
Kernbench (average of 10 Half and Optimal runs):
Elapsed Time:
- PIE disabled: no significant change (avg -0.239%)
- PIE enabled: average +0.07%
System Time:
- PIE disabled: no significant change (avg -0.277%)
- PIE enabled: average +0.7%
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82303
diffstat:
Documentation/x86/x86_64/mm.txt | 3
arch/x86/Kconfig | 37 ++++
arch/x86/Makefile | 14 +
arch/x86/boot/boot.h | 2
arch/x86/boot/compressed/Makefile | 5
arch/x86/boot/compressed/misc.c | 10 +
arch/x86/crypto/aes-x86_64-asm_64.S | 45 +++--
arch/x86/crypto/aesni-intel_asm.S | 14 +
arch/x86/crypto/aesni-intel_avx-x86_64.S | 6
arch/x86/crypto/camellia-aesni-avx-asm_64.S | 42 ++---
arch/x86/crypto/camellia-aesni-avx2-asm_64.S | 44 ++---
arch/x86/crypto/camellia-x86_64-asm_64.S | 8 -
arch/x86/crypto/cast5-avx-x86_64-asm_64.S | 50 +++---
arch/x86/crypto/cast6-avx-x86_64-asm_64.S | 44 +++--
arch/x86/crypto/des3_ede-asm_64.S | 96 ++++++++----
arch/x86/crypto/ghash-clmulni-intel_asm.S | 4
arch/x86/crypto/glue_helper-asm-avx.S | 4
arch/x86/crypto/glue_helper-asm-avx2.S | 6
arch/x86/entry/entry_32.S | 3
arch/x86/entry/entry_64.S | 29 ++-
arch/x86/include/asm/asm.h | 13 +
arch/x86/include/asm/bug.h | 2
arch/x86/include/asm/ftrace.h | 23 ++-
arch/x86/include/asm/jump_label.h | 8 -
arch/x86/include/asm/kvm_host.h | 6
arch/x86/include/asm/module.h | 14 +
arch/x86/include/asm/page_64_types.h | 9 +
arch/x86/include/asm/paravirt_types.h | 12 +
arch/x86/include/asm/percpu.h | 25 ++-
arch/x86/include/asm/pgtable_64_types.h | 6
arch/x86/include/asm/pm-trace.h | 2
arch/x86/include/asm/processor.h | 12 +
arch/x86/include/asm/sections.h | 4
arch/x86/include/asm/setup.h | 2
arch/x86/include/asm/stackprotector.h | 19 +-
arch/x86/kernel/acpi/wakeup_64.S | 31 ++--
arch/x86/kernel/asm-offsets.c | 3
arch/x86/kernel/asm-offsets_32.c | 3
arch/x86/kernel/asm-offsets_64.c | 3
arch/x86/kernel/cpu/common.c | 7
arch/x86/kernel/cpu/microcode/core.c | 4
arch/x86/kernel/ftrace.c | 168 ++++++++++++++--------
arch/x86/kernel/head64.c | 32 +++-
arch/x86/kernel/head_32.S | 3
arch/x86/kernel/head_64.S | 41 ++++-
arch/x86/kernel/kvm.c | 6
arch/x86/kernel/module.c | 204 ++++++++++++++++++++++++++-
arch/x86/kernel/module.lds | 3
arch/x86/kernel/process.c | 5
arch/x86/kernel/relocate_kernel_64.S | 8 -
arch/x86/kernel/setup_percpu.c | 2
arch/x86/kernel/vmlinux.lds.S | 13 +
arch/x86/kvm/svm.c | 4
arch/x86/lib/cmpxchg16b_emu.S | 8 -
arch/x86/mm/dump_pagetables.c | 11 -
arch/x86/power/hibernate_asm_64.S | 4
arch/x86/tools/relocs.c | 170 ++++++++++++++++++++--
arch/x86/tools/relocs.h | 4
arch/x86/tools/relocs_common.c | 15 +
arch/x86/xen/xen-asm.S | 12 -
arch/x86/xen/xen-head.S | 9 -
arch/x86/xen/xen-pvh.S | 13 +
drivers/base/firmware_class.c | 4
include/asm-generic/sections.h | 6
include/asm-generic/vmlinux.lds.h | 12 +
include/linux/compiler.h | 8 +
init/Kconfig | 9 +
kernel/kallsyms.c | 16 +-
kernel/trace/trace.h | 4
lib/dynamic_debug.c | 4
70 files changed, 1109 insertions(+), 363 deletions(-)
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Garnier <thgarnie@google.com>
To: Herbert Xu <herbert@gondor.apana.org.au>,
"David S . Miller" <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Thomas Garnier <thgarnie@google.com>,
Arnd Bergmann <arnd@arndb.de>, Kees Cook <keescook@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Andy Lutomirski <luto@kernel.org>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Borislav Petkov <bp@suse.de>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Juergen Gross <jgross@suse.com>,
Chris Wright <chrisw@sous-sol.org>,
Alok Kataria <akataria@vmware.com>,
Rusty Russell <rusty@rustcorp.com.au>, Tejun Heo <tj@kernel.org>,
Christoph Lameter <cl@linux.>
Cc: x86@kernel.org, linux-crypto@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
virtualization@lists.linux-foundation.org,
xen-devel@lists.xenproject.org, linux-arch@vger.kernel.org,
linux-sparse@vger.kernel.org, kvm@vger.kernel.org,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com
Subject: x86: PIE support and option to extend KASLR randomization
Date: Wed, 4 Oct 2017 14:19:36 -0700 [thread overview]
Message-ID: <20171004212003.28296-1-thgarnie@google.com> (raw)
These patches make the changes necessary to build the kernel as Position
Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below
the top 2G of the virtual address space. It allows to optionally extend the
KASLR randomization range from 1G to 3G.
Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler
changes, PIE support and KASLR in general. Thanks to Roland McGrath on his
feedback for using -pie versus --emit-relocs and details on compiler code
generation.
The patches:
- 1-3, 5-1#, 17-18: Change in assembly code to be PIE compliant.
- 4: Add a new _ASM_GET_PTR macro to fetch a symbol address generically.
- 14: Adapt percpu design to work correctly when PIE is enabled.
- 15: Provide an option to default visibility to hidden except for key symbols.
It removes errors between compilation units.
- 16: Adapt relocation tool to handle PIE binary correctly.
- 19: Add support for global cookie.
- 20: Support ftrace with PIE (used on Ubuntu config).
- 21: Fix incorrect address marker on dump_pagetables.
- 22: Add option to move the module section just after the kernel.
- 23: Adapt module loading to support PIE with dynamic GOT.
- 24: Make the GOT read-only.
- 25: Add the CONFIG_X86_PIE option (off by default).
- 26: Adapt relocation tool to generate a 64-bit relocation table.
- 27: Add the CONFIG_RANDOMIZE_BASE_LARGE option to increase relocation range
from 1G to 3G (off by default).
Performance/Size impact:
Size of vmlinux (Default configuration):
File size:
- PIE disabled: +0.000031%
- PIE enabled: -3.210% (less relocations)
.text section:
- PIE disabled: +0.000644%
- PIE enabled: +0.837%
Size of vmlinux (Ubuntu configuration):
File size:
- PIE disabled: -0.201%
- PIE enabled: -0.082%
.text section:
- PIE disabled: same
- PIE enabled: +1.319%
Size of vmlinux (Default configuration + ORC):
File size:
- PIE enabled: -3.167%
.text section:
- PIE enabled: +0.814%
Size of vmlinux (Ubuntu configuration + ORC):
File size:
- PIE enabled: -3.167%
.text section:
- PIE enabled: +1.26%
The size increase is mainly due to not having access to the 32-bit signed
relocation that can be used with mcmodel=kernel. A small part is due to reduced
optimization for PIE code. This bug [1] was opened with gcc to provide a better
code generation for kernel PIE.
Hackbench (50% and 1600% on thread/process for pipe/sockets):
- PIE disabled: no significant change (avg +0.1% on latest test).
- PIE enabled: between -0.50% to +0.86% in average (default and Ubuntu config).
slab_test (average of 10 runs):
- PIE disabled: no significant change (-2% on latest run, likely noise).
- PIE enabled: between -1% and +0.8% on latest runs.
Kernbench (average of 10 Half and Optimal runs):
Elapsed Time:
- PIE disabled: no significant change (avg -0.239%)
- PIE enabled: average +0.07%
System Time:
- PIE disabled: no significant change (avg -0.277%)
- PIE enabled: average +0.7%
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82303
diffstat:
Documentation/x86/x86_64/mm.txt | 3
arch/x86/Kconfig | 37 ++++
arch/x86/Makefile | 14 +
arch/x86/boot/boot.h | 2
arch/x86/boot/compressed/Makefile | 5
arch/x86/boot/compressed/misc.c | 10 +
arch/x86/crypto/aes-x86_64-asm_64.S | 45 +++--
arch/x86/crypto/aesni-intel_asm.S | 14 +
arch/x86/crypto/aesni-intel_avx-x86_64.S | 6
arch/x86/crypto/camellia-aesni-avx-asm_64.S | 42 ++---
arch/x86/crypto/camellia-aesni-avx2-asm_64.S | 44 ++---
arch/x86/crypto/camellia-x86_64-asm_64.S | 8 -
arch/x86/crypto/cast5-avx-x86_64-asm_64.S | 50 +++---
arch/x86/crypto/cast6-avx-x86_64-asm_64.S | 44 +++--
arch/x86/crypto/des3_ede-asm_64.S | 96 ++++++++----
arch/x86/crypto/ghash-clmulni-intel_asm.S | 4
arch/x86/crypto/glue_helper-asm-avx.S | 4
arch/x86/crypto/glue_helper-asm-avx2.S | 6
arch/x86/entry/entry_32.S | 3
arch/x86/entry/entry_64.S | 29 ++-
arch/x86/include/asm/asm.h | 13 +
arch/x86/include/asm/bug.h | 2
arch/x86/include/asm/ftrace.h | 23 ++-
arch/x86/include/asm/jump_label.h | 8 -
arch/x86/include/asm/kvm_host.h | 6
arch/x86/include/asm/module.h | 14 +
arch/x86/include/asm/page_64_types.h | 9 +
arch/x86/include/asm/paravirt_types.h | 12 +
arch/x86/include/asm/percpu.h | 25 ++-
arch/x86/include/asm/pgtable_64_types.h | 6
arch/x86/include/asm/pm-trace.h | 2
arch/x86/include/asm/processor.h | 12 +
arch/x86/include/asm/sections.h | 4
arch/x86/include/asm/setup.h | 2
arch/x86/include/asm/stackprotector.h | 19 +-
arch/x86/kernel/acpi/wakeup_64.S | 31 ++--
arch/x86/kernel/asm-offsets.c | 3
arch/x86/kernel/asm-offsets_32.c | 3
arch/x86/kernel/asm-offsets_64.c | 3
arch/x86/kernel/cpu/common.c | 7
arch/x86/kernel/cpu/microcode/core.c | 4
arch/x86/kernel/ftrace.c | 168 ++++++++++++++--------
arch/x86/kernel/head64.c | 32 +++-
arch/x86/kernel/head_32.S | 3
arch/x86/kernel/head_64.S | 41 ++++-
arch/x86/kernel/kvm.c | 6
arch/x86/kernel/module.c | 204 ++++++++++++++++++++++++++-
arch/x86/kernel/module.lds | 3
arch/x86/kernel/process.c | 5
arch/x86/kernel/relocate_kernel_64.S | 8 -
arch/x86/kernel/setup_percpu.c | 2
arch/x86/kernel/vmlinux.lds.S | 13 +
arch/x86/kvm/svm.c | 4
arch/x86/lib/cmpxchg16b_emu.S | 8 -
arch/x86/mm/dump_pagetables.c | 11 -
arch/x86/power/hibernate_asm_64.S | 4
arch/x86/tools/relocs.c | 170 ++++++++++++++++++++--
arch/x86/tools/relocs.h | 4
arch/x86/tools/relocs_common.c | 15 +
arch/x86/xen/xen-asm.S | 12 -
arch/x86/xen/xen-head.S | 9 -
arch/x86/xen/xen-pvh.S | 13 +
drivers/base/firmware_class.c | 4
include/asm-generic/sections.h | 6
include/asm-generic/vmlinux.lds.h | 12 +
include/linux/compiler.h | 8 +
init/Kconfig | 9 +
kernel/kallsyms.c | 16 +-
kernel/trace/trace.h | 4
lib/dynamic_debug.c | 4
70 files changed, 1109 insertions(+), 363 deletions(-)
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Garnier <thgarnie@google.com>
To: "Herbert Xu" <herbert@gondor.apana.org.au>,
"David S . Miller" <davem@davemloft.net>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
"H . Peter Anvin" <hpa@zytor.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Josh Poimboeuf" <jpoimboe@redhat.com>,
"Thomas Garnier" <thgarnie@google.com>,
"Arnd Bergmann" <arnd@arndb.de>,
"Kees Cook" <keescook@chromium.org>,
"Matthias Kaehlcke" <mka@chromium.org>,
"Tom Lendacky" <thomas.lendacky@amd.com>,
"Andy Lutomirski" <luto@kernel.org>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
"Borislav Petkov" <bp@suse.de>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
"Len Brown" <len.brown@intel.com>, "Pavel Machek" <pavel@ucw.cz>,
"Juergen Gross" <jgross@suse.com>,
"Chris Wright" <chrisw@sous-sol.org>,
"Alok Kataria" <akataria@vmware.com>,
"Rusty Russell" <rusty@rustcorp.com.au>,
"Tejun Heo" <tj@kernel.org>, "Christoph Lameter" <cl@linux.com>,
"Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
"Alexey Dobriyan" <adobriyan@gmail.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Paul Gortmaker" <paul.gortmaker@windriver.com>,
"Chris Metcalf" <cmetcalf@mellanox.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
"Nicolas Pitre" <nicolas.pitre@linaro.org>,
"Borislav Petkov" <bp@alien8.de>,
"Luis R . Rodriguez" <mcgrof@kernel.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Christopher Li" <sparse@chrisli.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Jason Baron" <jbaron@akamai.com>,
"Dou Liyang" <douly.fnst@cn.fujitsu.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
"Mika Westerberg" <mika.westerberg@linux.intel.com>,
"Lukas Wunner" <lukas@wunner.de>,
"Masahiro Yamada" <yamada.masahiro@socionext.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Markus Trippelsdorf" <markus@trippelsdorf.de>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Joerg Roedel" <joro@8bytes.org>,
"Rik van Riel" <riel@redhat.com>,
"David Howells" <dhowells@redhat.com>,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
"Waiman Long" <longman@redhat.com>, "Kyle Huey" <me@kylehuey.com>,
"Andrey Ryabinin" <aryabinin@virtuozzo.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Matthew Wilcox" <mawilcox@microsoft.com>,
"Michal Hocko" <mhocko@suse.com>,
"Peter Foley" <pefoley2@pefoley.com>,
"Paul Bolle" <pebolle@tiscali.nl>,
"Jiri Kosina" <jkosina@suse.cz>, "Rob Landley" <rob@landley.net>,
"H . J . Lu" <hjl.tools@gmail.com>, "Baoquan He" <bhe@redhat.com>,
"Jan H . Schönherr" <jschoenh@amazon.de>,
"Daniel Micay" <danielmicay@gmail.com>
Cc: x86@kernel.org, linux-crypto@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
virtualization@lists.linux-foundation.org,
xen-devel@lists.xenproject.org, linux-arch@vger.kernel.org,
linux-sparse@vger.kernel.org, kvm@vger.kernel.org,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com
Subject: [kernel-hardening] x86: PIE support and option to extend KASLR randomization
Date: Wed, 4 Oct 2017 14:19:36 -0700 [thread overview]
Message-ID: <20171004212003.28296-1-thgarnie@google.com> (raw)
These patches make the changes necessary to build the kernel as Position
Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below
the top 2G of the virtual address space. It allows to optionally extend the
KASLR randomization range from 1G to 3G.
Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler
changes, PIE support and KASLR in general. Thanks to Roland McGrath on his
feedback for using -pie versus --emit-relocs and details on compiler code
generation.
The patches:
- 1-3, 5-1#, 17-18: Change in assembly code to be PIE compliant.
- 4: Add a new _ASM_GET_PTR macro to fetch a symbol address generically.
- 14: Adapt percpu design to work correctly when PIE is enabled.
- 15: Provide an option to default visibility to hidden except for key symbols.
It removes errors between compilation units.
- 16: Adapt relocation tool to handle PIE binary correctly.
- 19: Add support for global cookie.
- 20: Support ftrace with PIE (used on Ubuntu config).
- 21: Fix incorrect address marker on dump_pagetables.
- 22: Add option to move the module section just after the kernel.
- 23: Adapt module loading to support PIE with dynamic GOT.
- 24: Make the GOT read-only.
- 25: Add the CONFIG_X86_PIE option (off by default).
- 26: Adapt relocation tool to generate a 64-bit relocation table.
- 27: Add the CONFIG_RANDOMIZE_BASE_LARGE option to increase relocation range
from 1G to 3G (off by default).
Performance/Size impact:
Size of vmlinux (Default configuration):
File size:
- PIE disabled: +0.000031%
- PIE enabled: -3.210% (less relocations)
.text section:
- PIE disabled: +0.000644%
- PIE enabled: +0.837%
Size of vmlinux (Ubuntu configuration):
File size:
- PIE disabled: -0.201%
- PIE enabled: -0.082%
.text section:
- PIE disabled: same
- PIE enabled: +1.319%
Size of vmlinux (Default configuration + ORC):
File size:
- PIE enabled: -3.167%
.text section:
- PIE enabled: +0.814%
Size of vmlinux (Ubuntu configuration + ORC):
File size:
- PIE enabled: -3.167%
.text section:
- PIE enabled: +1.26%
The size increase is mainly due to not having access to the 32-bit signed
relocation that can be used with mcmodel=kernel. A small part is due to reduced
optimization for PIE code. This bug [1] was opened with gcc to provide a better
code generation for kernel PIE.
Hackbench (50% and 1600% on thread/process for pipe/sockets):
- PIE disabled: no significant change (avg +0.1% on latest test).
- PIE enabled: between -0.50% to +0.86% in average (default and Ubuntu config).
slab_test (average of 10 runs):
- PIE disabled: no significant change (-2% on latest run, likely noise).
- PIE enabled: between -1% and +0.8% on latest runs.
Kernbench (average of 10 Half and Optimal runs):
Elapsed Time:
- PIE disabled: no significant change (avg -0.239%)
- PIE enabled: average +0.07%
System Time:
- PIE disabled: no significant change (avg -0.277%)
- PIE enabled: average +0.7%
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82303
diffstat:
Documentation/x86/x86_64/mm.txt | 3
arch/x86/Kconfig | 37 ++++
arch/x86/Makefile | 14 +
arch/x86/boot/boot.h | 2
arch/x86/boot/compressed/Makefile | 5
arch/x86/boot/compressed/misc.c | 10 +
arch/x86/crypto/aes-x86_64-asm_64.S | 45 +++--
arch/x86/crypto/aesni-intel_asm.S | 14 +
arch/x86/crypto/aesni-intel_avx-x86_64.S | 6
arch/x86/crypto/camellia-aesni-avx-asm_64.S | 42 ++---
arch/x86/crypto/camellia-aesni-avx2-asm_64.S | 44 ++---
arch/x86/crypto/camellia-x86_64-asm_64.S | 8 -
arch/x86/crypto/cast5-avx-x86_64-asm_64.S | 50 +++---
arch/x86/crypto/cast6-avx-x86_64-asm_64.S | 44 +++--
arch/x86/crypto/des3_ede-asm_64.S | 96 ++++++++----
arch/x86/crypto/ghash-clmulni-intel_asm.S | 4
arch/x86/crypto/glue_helper-asm-avx.S | 4
arch/x86/crypto/glue_helper-asm-avx2.S | 6
arch/x86/entry/entry_32.S | 3
arch/x86/entry/entry_64.S | 29 ++-
arch/x86/include/asm/asm.h | 13 +
arch/x86/include/asm/bug.h | 2
arch/x86/include/asm/ftrace.h | 23 ++-
arch/x86/include/asm/jump_label.h | 8 -
arch/x86/include/asm/kvm_host.h | 6
arch/x86/include/asm/module.h | 14 +
arch/x86/include/asm/page_64_types.h | 9 +
arch/x86/include/asm/paravirt_types.h | 12 +
arch/x86/include/asm/percpu.h | 25 ++-
arch/x86/include/asm/pgtable_64_types.h | 6
arch/x86/include/asm/pm-trace.h | 2
arch/x86/include/asm/processor.h | 12 +
arch/x86/include/asm/sections.h | 4
arch/x86/include/asm/setup.h | 2
arch/x86/include/asm/stackprotector.h | 19 +-
arch/x86/kernel/acpi/wakeup_64.S | 31 ++--
arch/x86/kernel/asm-offsets.c | 3
arch/x86/kernel/asm-offsets_32.c | 3
arch/x86/kernel/asm-offsets_64.c | 3
arch/x86/kernel/cpu/common.c | 7
arch/x86/kernel/cpu/microcode/core.c | 4
arch/x86/kernel/ftrace.c | 168 ++++++++++++++--------
arch/x86/kernel/head64.c | 32 +++-
arch/x86/kernel/head_32.S | 3
arch/x86/kernel/head_64.S | 41 ++++-
arch/x86/kernel/kvm.c | 6
arch/x86/kernel/module.c | 204 ++++++++++++++++++++++++++-
arch/x86/kernel/module.lds | 3
arch/x86/kernel/process.c | 5
arch/x86/kernel/relocate_kernel_64.S | 8 -
arch/x86/kernel/setup_percpu.c | 2
arch/x86/kernel/vmlinux.lds.S | 13 +
arch/x86/kvm/svm.c | 4
arch/x86/lib/cmpxchg16b_emu.S | 8 -
arch/x86/mm/dump_pagetables.c | 11 -
arch/x86/power/hibernate_asm_64.S | 4
arch/x86/tools/relocs.c | 170 ++++++++++++++++++++--
arch/x86/tools/relocs.h | 4
arch/x86/tools/relocs_common.c | 15 +
arch/x86/xen/xen-asm.S | 12 -
arch/x86/xen/xen-head.S | 9 -
arch/x86/xen/xen-pvh.S | 13 +
drivers/base/firmware_class.c | 4
include/asm-generic/sections.h | 6
include/asm-generic/vmlinux.lds.h | 12 +
include/linux/compiler.h | 8 +
init/Kconfig | 9 +
kernel/kallsyms.c | 16 +-
kernel/trace/trace.h | 4
lib/dynamic_debug.c | 4
70 files changed, 1109 insertions(+), 363 deletions(-)
next reply other threads:[~2017-10-04 21:19 UTC|newest]
Thread overview: 231+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-04 21:19 Thomas Garnier [this message]
2017-10-04 21:19 ` [kernel-hardening] x86: PIE support and option to extend KASLR randomization Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 01/27] x86/crypto: Adapt assembly for PIE support Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 02/27] x86: Use symbol name on bug table " Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 03/27] x86: Use symbol name in jump " Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 04/27] x86: Add macro to get symbol address " Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 05/27] x86: relocate_kernel - Adapt assembly " Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 06/27] x86/entry/64: " Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 07/27] x86: pm-trace - " Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 08/27] x86/CPU: " Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 09/27] x86/acpi: " Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 10/27] x86/boot/64: " Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 11/27] x86/power/64: " Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 12/27] x86/paravirt: " Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 13/27] x86/boot/64: Use _text in a global " Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 14/27] x86/percpu: Adapt percpu " Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 15/27] compiler: Option to default to hidden symbols Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 16/27] x86/relocs: Handle PIE relocations Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 17/27] xen: Adapt assembly for PIE support Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 18/27] kvm: " Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 19/27] x86: Support global stack cookie Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [RFC v3 20/27] x86/ftrace: Adapt function tracing for PIE support Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-05 13:06 ` Steven Rostedt
2017-10-05 13:06 ` [kernel-hardening] " Steven Rostedt
2017-10-05 16:01 ` Thomas Garnier via Virtualization
2017-10-05 16:01 ` Thomas Garnier
2017-10-05 16:01 ` [kernel-hardening] " Thomas Garnier
2017-10-05 16:01 ` Thomas Garnier
2017-10-05 16:11 ` Steven Rostedt
2017-10-05 16:11 ` [kernel-hardening] " Steven Rostedt
2017-10-05 16:14 ` Thomas Garnier
2017-10-05 16:14 ` [kernel-hardening] " Thomas Garnier
2017-10-05 16:14 ` Thomas Garnier
2017-10-05 16:14 ` Thomas Garnier
2017-10-05 16:14 ` Thomas Garnier via Virtualization
2017-10-05 16:11 ` Steven Rostedt
2017-10-05 16:01 ` Thomas Garnier
2017-10-05 13:06 ` Steven Rostedt
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 21/27] x86/mm/dump_pagetables: Fix address markers index on x86_64 Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 22/27] x86/modules: Add option to start module section after kernel Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier via Virtualization
2017-10-04 21:19 ` [RFC v3 23/27] x86/modules: Adapt module loading for PIE support Thomas Garnier via Virtualization
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:19 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:19 ` Thomas Garnier
2017-10-04 21:20 ` [RFC v3 24/27] x86/mm: Make the x86 GOT read-only Thomas Garnier via Virtualization
2017-10-04 21:20 ` Thomas Garnier
2017-10-04 21:20 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:20 ` Thomas Garnier
2017-10-04 21:20 ` [RFC v3 25/27] x86/pie: Add option to build the kernel as PIE Thomas Garnier
2017-10-04 21:20 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:20 ` Thomas Garnier
2017-10-04 21:20 ` Thomas Garnier via Virtualization
2017-10-04 21:20 ` [RFC v3 26/27] x86/relocs: Add option to generate 64-bit relocations Thomas Garnier
2017-10-04 21:20 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:20 ` Thomas Garnier
2017-10-04 21:20 ` Thomas Garnier via Virtualization
2017-10-04 21:20 ` [RFC v3 27/27] x86/kaslr: Add option to extend KASLR range from 1GB to 3GB Thomas Garnier
2017-10-04 21:20 ` [kernel-hardening] " Thomas Garnier
2017-10-04 21:20 ` Thomas Garnier
2017-10-04 21:20 ` Thomas Garnier via Virtualization
-- strict thread matches above, loose matches on Subject: below --
2017-10-04 21:19 x86: PIE support and option to extend KASLR randomization Thomas Garnier via Virtualization
2017-10-04 21:19 Thomas Garnier
2017-08-10 17:25 Thomas Garnier
2017-08-11 12:41 ` Ingo Molnar
2017-08-11 12:41 ` Ingo Molnar
2017-08-11 15:09 ` Thomas Garnier
2017-08-15 7:56 ` Ingo Molnar
2017-08-15 7:56 ` Ingo Molnar
2017-08-15 14:20 ` Thomas Garnier
2017-08-15 14:20 ` Thomas Garnier
2017-08-15 14:47 ` Daniel Micay
2017-08-15 14:47 ` Daniel Micay
2017-08-15 14:58 ` Thomas Garnier
2017-08-15 14:58 ` Thomas Garnier
2017-08-16 15:12 ` Ingo Molnar
2017-08-16 15:12 ` Ingo Molnar
2017-08-16 16:09 ` Christopher Lameter
2017-08-16 16:09 ` Christopher Lameter
2017-08-16 16:26 ` Daniel Micay
2017-08-16 16:26 ` Daniel Micay
2017-08-16 16:32 ` Ard Biesheuvel
2017-08-16 16:32 ` Ard Biesheuvel
2017-08-16 16:57 ` Thomas Garnier
2017-08-16 16:57 ` Thomas Garnier
2017-08-17 8:09 ` Ingo Molnar
2017-08-17 8:09 ` Ingo Molnar
2017-08-17 14:10 ` Thomas Garnier
2017-08-17 14:10 ` Thomas Garnier
2017-08-24 21:13 ` Thomas Garnier
2017-08-24 21:13 ` Thomas Garnier
2017-08-24 21:42 ` Linus Torvalds
2017-08-24 21:42 ` Linus Torvalds
2017-08-25 15:35 ` Thomas Garnier
2017-08-25 15:35 ` Thomas Garnier
2017-08-25 1:07 ` Steven Rostedt
2017-08-25 8:04 ` Ingo Molnar
2017-08-25 8:04 ` Ingo Molnar
2017-08-25 15:05 ` Thomas Garnier
2017-08-29 19:34 ` Thomas Garnier
2017-09-21 15:59 ` Ingo Molnar
2017-09-21 15:59 ` Ingo Molnar
2017-09-21 16:10 ` Ard Biesheuvel
2017-09-21 16:10 ` Ard Biesheuvel
2017-09-21 21:21 ` Thomas Garnier
2017-09-21 21:21 ` Thomas Garnier
2017-09-22 4:24 ` Markus Trippelsdorf
2017-09-22 14:38 ` Thomas Garnier
2017-09-22 14:38 ` Thomas Garnier
2017-09-22 23:55 ` Thomas Garnier
2017-09-22 23:55 ` Thomas Garnier
2017-09-21 21:16 ` Thomas Garnier
2017-09-22 0:06 ` Thomas Garnier
2017-09-22 0:06 ` Thomas Garnier
2017-09-22 16:32 ` Ingo Molnar
2017-09-22 18:08 ` Thomas Garnier
2017-09-23 9:43 ` Ingo Molnar
2017-10-02 20:28 ` Thomas Garnier
2017-10-02 20:28 ` Thomas Garnier
2017-09-23 9:43 ` Ingo Molnar
2017-09-22 18:08 ` Thomas Garnier
2017-09-22 18:38 ` H. Peter Anvin
2017-09-22 18:38 ` H. Peter Anvin
2017-09-22 18:57 ` Kees Cook
2017-09-22 19:06 ` H. Peter Anvin
2017-09-22 22:19 ` hjl.tools
2017-09-22 22:30 ` hjl.tools
2017-09-22 19:06 ` H. Peter Anvin
2017-09-22 18:57 ` Kees Cook
2017-09-22 18:59 ` Thomas Garnier
2017-09-22 18:59 ` Thomas Garnier
2017-09-23 9:49 ` Ingo Molnar
2017-09-23 9:49 ` Ingo Molnar
2017-09-22 16:32 ` Ingo Molnar
2017-09-21 21:16 ` Thomas Garnier
2017-08-29 19:34 ` Thomas Garnier
2017-08-25 15:05 ` Thomas Garnier
2017-08-21 13:32 ` Peter Zijlstra
2017-08-21 13:32 ` Peter Zijlstra
2017-08-21 14:28 ` Peter Zijlstra
2017-09-22 18:27 ` H. Peter Anvin
2017-09-22 18:27 ` H. Peter Anvin
2017-09-23 10:00 ` Ingo Molnar
2017-09-24 22:37 ` Pavel Machek
2017-09-25 7:33 ` Ingo Molnar
2017-10-06 10:39 ` Pavel Machek
2017-10-20 8:13 ` Ingo Molnar
2017-10-20 8:13 ` Ingo Molnar
2017-10-06 10:39 ` Pavel Machek
2017-09-25 7:33 ` Ingo Molnar
2017-09-24 22:37 ` Pavel Machek
2017-09-23 10:00 ` Ingo Molnar
2017-08-21 14:28 ` Peter Zijlstra
2017-08-21 14:31 ` Peter Zijlstra
2017-08-21 14:31 ` Peter Zijlstra
2017-08-21 15:57 ` Thomas Garnier
2017-08-21 15:57 ` Thomas Garnier
2017-08-28 1:26 ` H. Peter Anvin
2017-08-28 1:26 ` H. Peter Anvin
2017-08-11 15:09 ` Thomas Garnier
2017-08-10 17:25 Thomas Garnier
2017-07-18 22:33 Thomas Garnier
2017-07-18 22:33 Thomas Garnier
2017-07-19 14:08 ` Christopher Lameter
2017-07-19 14:08 ` Christopher Lameter
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