From: Thomas Garnier via Virtualization <virtualization@lists.linux-foundation.org>
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>Bor
Cc: linux-arch@vger.kernel.org, kvm@vger.kernel.org,
linux-pm@vger.kernel.org, x86@kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
linux-sparse@vger.kernel.org, linux-crypto@vger.kernel.org,
kernel-hardening@lists.openwall.com,
xen-devel@lists.xenproject.org
Subject: [RFC v3 05/27] x86: relocate_kernel - Adapt assembly for PIE support
Date: Wed, 4 Oct 2017 14:19:41 -0700 [thread overview]
Message-ID: <20171004212003.28296-6-thgarnie__13279.8064420514$1509079772$gmane$org@google.com> (raw)
In-Reply-To: <20171004212003.28296-1-thgarnie@google.com>
Change the assembly code to use only relative references of symbols for the
kernel to be PIE compatible.
Position Independent Executable (PIE) support will allow to extended the
KASLR randomization range below the -2G memory limit.
Signed-off-by: Thomas Garnier <thgarnie@google.com>
---
arch/x86/kernel/relocate_kernel_64.S | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S
index 307d3bac5f04..2ecbdcbe985b 100644
--- a/arch/x86/kernel/relocate_kernel_64.S
+++ b/arch/x86/kernel/relocate_kernel_64.S
@@ -200,9 +200,11 @@ identity_mapped:
movq %rax, %cr3
lea PAGE_SIZE(%r8), %rsp
call swap_pages
- movq $virtual_mapped, %rax
- pushq %rax
- ret
+ jmp *virtual_mapped_addr(%rip)
+
+ /* Absolute value for PIE support */
+virtual_mapped_addr:
+ .quad virtual_mapped
virtual_mapped:
movq RSP(%r8), %rsp
--
2.14.2.920.gcf0c67979c-goog
next prev parent reply other threads:[~2017-10-04 21:19 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-04 21:19 x86: PIE support and option to extend KASLR randomization 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 01/27] x86/crypto: Adapt assembly for PIE support 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 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
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 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 [this message]
2017-10-04 21:19 ` [RFC v3 06/27] x86/entry/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 07/27] x86: pm-trace - " 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 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 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 10/27] x86/boot/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 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
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 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
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 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 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 17/27] xen: Adapt assembly for PIE support 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 18/27] kvm: " 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 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 ` Steven Rostedt
2017-10-05 13:06 ` [kernel-hardening] " Steven Rostedt
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 ` Steven Rostedt
2017-10-05 16:11 ` [kernel-hardening] " Steven Rostedt
2017-10-05 16:14 ` Thomas Garnier
2017-10-05 16:14 ` Thomas Garnier via Virtualization
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 16:01 ` Thomas Garnier
2017-10-05 16:01 ` Thomas Garnier via Virtualization
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 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 22/27] x86/modules: Add option to start module section after kernel 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 23/27] x86/modules: Adapt module loading for PIE support 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 21:20 ` [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 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
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