From: Thomas Garnier <thgarnie@google.com>
To: kernel-hardening@lists.openwall.com
Cc: Thomas Garnier <thgarnie@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Philippe Ombredanne <pombredanne@nexb.com>,
Kate Stewart <kstewart@linuxfoundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH v5 02/27] x86: Use symbol name on bug table for PIE support
Date: Mon, 25 Jun 2018 15:38:50 -0700 [thread overview]
Message-ID: <20180625224014.134829-3-thgarnie@google.com> (raw)
In-Reply-To: <20180625224014.134829-1-thgarnie@google.com>
Replace the %c constraint with %P. The %c is incompatible with PIE
because it implies an immediate value whereas %P reference a symbol.
Position Independent Executable (PIE) support will allow to extend the
KASLR randomization range 0xffffffff80000000.
Signed-off-by: Thomas Garnier <thgarnie@google.com>
---
arch/x86/include/asm/bug.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/bug.h b/arch/x86/include/asm/bug.h
index 6804d6642767..3d690a4abf50 100644
--- a/arch/x86/include/asm/bug.h
+++ b/arch/x86/include/asm/bug.h
@@ -35,7 +35,7 @@ do { \
asm volatile("1:\t" ins "\n" \
".pushsection __bug_table,\"aw\"\n" \
"2:\t" __BUG_REL(1b) "\t# bug_entry::bug_addr\n" \
- "\t" __BUG_REL(%c0) "\t# bug_entry::file\n" \
+ "\t" __BUG_REL(%P0) "\t# bug_entry::file\n" \
"\t.word %c1" "\t# bug_entry::line\n" \
"\t.word %c2" "\t# bug_entry::flags\n" \
"\t.org 2b+%c3\n" \
--
2.18.0.rc2.346.g013aa6912e-goog
next prev parent reply other threads:[~2018-06-25 22:48 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180625224014.134829-1-thgarnie@google.com>
2018-06-25 22:38 ` [PATCH v5 01/27] x86/crypto: Adapt assembly " Thomas Garnier
2018-06-25 22:38 ` Thomas Garnier [this message]
2018-06-25 22:38 ` [PATCH v5 03/27] x86: Use symbol name in jump table " Thomas Garnier
2018-06-25 22:38 ` [PATCH v5 04/27] x86: Add macro to get symbol address " Thomas Garnier
2018-06-25 22:38 ` [PATCH v5 05/27] x86: relocate_kernel - Adapt assembly " Thomas Garnier
2018-06-25 22:38 ` [PATCH v5 06/27] x86/entry/64: " Thomas Garnier
2018-06-25 22:38 ` [PATCH v5 07/27] x86: pm-trace - " Thomas Garnier
2018-06-25 22:38 ` [PATCH v5 08/27] x86/CPU: " Thomas Garnier
2018-06-25 22:38 ` [PATCH v5 09/27] x86/acpi: " Thomas Garnier
2018-06-25 22:38 ` [PATCH v5 10/27] x86/boot/64: " Thomas Garnier
2018-06-25 22:38 ` [PATCH v5 11/27] x86/power/64: " Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 12/27] x86/paravirt: " Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 13/27] x86/boot/64: Build head64.c as mcmodel large when PIE is enabled Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 14/27] x86/percpu: Adapt percpu for PIE support Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 15/27] compiler: Option to default to hidden symbols Thomas Garnier
2018-06-25 23:25 ` Randy Dunlap
2018-06-25 22:39 ` [PATCH v5 16/27] compiler: Option to add PROVIDE_HIDDEN replacement for weak symbols Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 17/27] x86/relocs: Handle PIE relocations Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 18/27] xen: Adapt assembly for PIE support Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 19/27] kvm: " Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 20/27] x86: Support global stack cookie Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 21/27] x86/ftrace: Adapt function tracing for PIE support Thomas Garnier
2018-06-26 15:21 ` Steven Rostedt
2018-06-25 22:39 ` [PATCH v5 22/27] x86/modules: Add option to start module section after kernel Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 23/27] x86/modules: Adapt module loading for PIE support Thomas Garnier
2018-06-25 23:51 ` Randy Dunlap
2018-06-25 23:53 ` Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 24/27] x86/mm: Make the x86 GOT read-only Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 25/27] x86/pie: Add option to build the kernel as PIE Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 26/27] x86/relocs: Add option to generate 64-bit relocations Thomas Garnier
2018-06-25 22:39 ` [PATCH v5 27/27] x86/kaslr: Add option to extend KASLR range from 1GB to 3GB Thomas Garnier
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