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Koen Kooi
ebbeb55561
Also add script used to generate patches and SRC_URI Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
56 lines
2.1 KiB
Diff
56 lines
2.1 KiB
Diff
From f510b59b5a609d4b0512806b6d87c40db7917378 Mon Sep 17 00:00:00 2001
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From: Jiri Olsa <jolsa@redhat.com>
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Date: Mon, 6 Feb 2012 18:54:06 -0200
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Subject: [PATCH 04/30] perf tools: Fix perf stack to non executable on x86_64
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commit 7a0153ee15575a4d07b5da8c96b79e0b0fd41a12 upstream.
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By adding following objects:
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bench/mem-memcpy-x86-64-asm.o
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the x86_64 perf binary ended up with executable stack.
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The reason was that above object are assembler sourced and is missing the
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GNU-stack note section. In such case the linker assumes that the final binary
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should not be restricted at all and mark the stack as RWX.
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Adding section ".note.GNU-stack" definition to mentioned object, with all
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flags disabled, thus omiting this object from linker stack flags decision.
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Problem introduced in:
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$ git describe ea7872b
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v2.6.37-rc2-19-gea7872b
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Reported-at: https://bugzilla.redhat.com/show_bug.cgi?id=783570
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Reported-by: Clark Williams <williams@redhat.com>
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Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
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Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
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Cc: Ingo Molnar <mingo@elte.hu>
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Cc: Paul Mackerras <paulus@samba.org>
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Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Link: http://lkml.kernel.org/r/1328100848-5630-1-git-send-email-jolsa@redhat.com
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Signed-off-by: Jiri Olsa <jolsa@redhat.com>
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[ committer note: Backported fix to perf/urgent (3.3-rc2+) ]
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Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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tools/perf/bench/mem-memcpy-x86-64-asm.S | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/tools/perf/bench/mem-memcpy-x86-64-asm.S b/tools/perf/bench/mem-memcpy-x86-64-asm.S
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index a57b66e..185a96d 100644
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--- a/tools/perf/bench/mem-memcpy-x86-64-asm.S
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+++ b/tools/perf/bench/mem-memcpy-x86-64-asm.S
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@@ -1,2 +1,8 @@
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#include "../../../arch/x86/lib/memcpy_64.S"
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+/*
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+ * We need to provide note.GNU-stack section, saying that we want
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+ * NOT executable stack. Otherwise the final linking will assume that
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+ * the ELF stack should not be restricted at all and set it RWX.
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+ */
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+.section .note.GNU-stack,"",@progbits
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--
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1.7.9.4
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