Author: aurel32
Date: 2011-10-30 17:05:36 +0000 (Sun, 30 Oct 2011)
New Revision: 5021
Added:
glibc-package/branches/glibc-branch-squeeze/debian/patches/amd64/cvs-avx-detection.diff
Modified:
glibc-package/branches/glibc-branch-squeeze/debian/changelog
glibc-package/branches/glibc-branch-squeeze/debian/patches/series
Log:
* patches/amd64/cvs-avx-detection.diff: do not use AVX if hardware support
is present, but not enabled in the kernel. Closes: #646549.
Modified: glibc-package/branches/glibc-branch-squeeze/debian/changelog
===================================================================
--- glibc-package/branches/glibc-branch-squeeze/debian/changelog
2011-10-30 17:03:00 UTC (rev 5020)
+++ glibc-package/branches/glibc-branch-squeeze/debian/changelog
2011-10-30 17:05:36 UTC (rev 5021)
@@ -50,6 +50,8 @@
* patches/i386/local-cpuid-level2.diff: fix a typo. Closes: #609389.
* patches/any/cvs-nptl-pthread-race.diff: fix a race in NPTL code that
sometimes causes a deadlock when calling fork() from a thread.
+ * patches/amd64/cvs-avx-detection.diff: do not use AVX if hardware support
+ is present, but not enabled in the kernel. Closes: #646549.
-- Aurelien Jarno <aure...@debian.org> Sat, 11 Jun 2011 18:12:35 +0200
Added:
glibc-package/branches/glibc-branch-squeeze/debian/patches/amd64/cvs-avx-detection.diff
===================================================================
---
glibc-package/branches/glibc-branch-squeeze/debian/patches/amd64/cvs-avx-detection.diff
(rev 0)
+++
glibc-package/branches/glibc-branch-squeeze/debian/patches/amd64/cvs-avx-detection.diff
2011-10-30 17:05:36 UTC (rev 5021)
@@ -0,0 +1,164 @@
+2011-07-23 Ulrich Drepper <drep...@gmail.com>
+
+ * sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Fix one more
+ typo.
+ (_dl_x86_64_save_sse): Likewise.
+
+2011-07-22 Ulrich Drepper <drep...@gmail.com>
+
+ * sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Fix test for
+ OSXSAVE.
+ (_dl_x86_64_save_sse): Likewise.
+
+2011-07-21 Andreas Schwab <sch...@redhat.com>
+
+ * sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Fix last
+ change.
+ (_dl_x86_64_save_sse): Use correct AVX check.
+
+2011-07-20 Ulrich Drepper <drep...@gmail.com>
+
+ [BZ #13007]
+ * sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): More complete
+ check for AVX enablement so that we don't crash with old kernels and
+ new hardware.
+ * elf/tst-audit4.c: Add same checks here.
+ * elf/tst-audit6.c: Likewise.
+
+---
+ elf/tst-audit4.c | 22 ++++++++++++++++++----
+ elf/tst-audit6.c | 22 ++++++++++++++++++----
+ sysdeps/x86_64/dl-trampoline.S | 36 +++++++++++++++++++++++++++---------
+ 3 files changed, 63 insertions(+), 17 deletions(-)
+
+--- a/elf/tst-audit4.c
++++ b/elf/tst-audit4.c
+@@ -6,16 +6,30 @@
+ #include <cpuid.h>
+ #include <immintrin.h>
+
++
++static int
++avx_enabled (void)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0
++ || (ecx & (bit_AVX | bit_OSXSAVE)) != (bit_AVX | bit_OSXSAVE))
++ return 0;
++
++ /* Check the OS has AVX and SSE saving enabled. */
++ asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
++
++ return (eax & 6) == 6;
++}
++
++
+ extern __m256i audit_test (__m256i, __m256i, __m256i, __m256i,
+ __m256i, __m256i, __m256i, __m256i);
+ int
+ main (void)
+ {
+- unsigned int eax, ebx, ecx, edx;
+-
+ /* Run AVX test only if AVX is supported. */
+- if (__get_cpuid (1, &eax, &ebx, &ecx, &edx)
+- && (ecx & bit_AVX))
++ if (avx_enabled ())
+ {
+ __m256i ymm = _mm256_setzero_si256 ();
+ __m256i ret = audit_test (ymm, ymm, ymm, ymm, ymm, ymm, ymm, ymm);
+--- a/elf/tst-audit6.c
++++ b/elf/tst-audit6.c
+@@ -9,14 +9,28 @@
+ extern __m128i audit_test (__m128i, __m128i, __m128i, __m128i,
+ __m128i, __m128i, __m128i, __m128i);
+
+-int
+-main (void)
++
++static int
++avx_enabled (void)
+ {
+ unsigned int eax, ebx, ecx, edx;
+
++ if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0
++ || (ecx & (bit_AVX | bit_OSXSAVE)) != (bit_AVX | bit_OSXSAVE))
++ return 0;
++
++ /* Check the OS has AVX and SSE saving enabled. */
++ asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
++
++ return (eax & 6) == 6;
++}
++
++
++int
++main (void)
++{
+ /* Run AVX test only if AVX is supported. */
+- if (__get_cpuid (1, &eax, &ebx, &ecx, &edx)
+- && (ecx & bit_AVX))
++ if (avx_enabled ())
+ {
+ __m128i xmm = _mm_setzero_si128 ();
+ __m128i ret = audit_test (xmm, xmm, xmm, xmm, xmm, xmm, xmm, xmm);
+--- a/sysdeps/x86_64/dl-trampoline.S
++++ b/sysdeps/x86_64/dl-trampoline.S
+@@ -1,5 +1,5 @@
+ /* PLT trampolines. x86-64 version.
+- Copyright (C) 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
++ Copyright (C) 2004, 2005, 2007, 2009, 2011 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+@@ -139,11 +139,20 @@
+ movl $1, %eax
+ cpuid
+ movq %r11,%rbx # Restore rbx
+- movl $1, %eax
+- testl $(1 << 28), %ecx
++ xorl %eax, %eax
++ // AVX and XSAVE supported?
++ andl $((1 << 28) | (1 << 27)), %ecx
++ cmpl $((1 << 28) | (1 << 27)), %ecx
+ jne 2f
+- negl %eax
+-2: movl %eax, L(have_avx)(%rip)
++ xorl %ecx, %ecx
++ // Get XFEATURE_ENABLED_MASK
++ xgetbv
++ andl $0x6, %eax
++ cmpl $0x6, %eax
++ // Nonzero if SSE and AVX state saving is enabled.
++ sete %al
++2: leal -1(%eax,%eax), %eax
++ movl %eax, L(have_avx)(%rip)
+ cmpl $0, %eax
+
+ 1: js L(no_avx)
+@@ -176,11 +185,20 @@
+ movl $1, %eax
+ cpuid
+ movq %r11,%rbx # Restore rbx
+- movl $1, %eax
+- testl $(1 << 28), %ecx
++ xorl %eax, %eax
++ // AVX and XSAVE supported?
++ andl $((1 << 28) | (1 << 27)), %ecx
++ cmpl $((1 << 28) | (1 << 27)), %ecx
+ jne 2f
+- negl %eax
+-2: movl %eax, L(have_avx)(%rip)
++ xorl %ecx, %ecx
++ // Get XFEATURE_ENABLED_MASK
++ xgetbv
++ andl $0x6, %eax
++ cmpl $0x6, %eax
++ // Nonzero if SSE and AVX state saving is enabled.
++ sete %al
++2: leal -1(%eax,%eax), %eax
++ movl %eax, L(have_avx)(%rip)
+ cmpl $0, %eax
+
+ 1: js L(no_avx5)
Modified: glibc-package/branches/glibc-branch-squeeze/debian/patches/series
===================================================================
--- glibc-package/branches/glibc-branch-squeeze/debian/patches/series
2011-10-30 17:03:00 UTC (rev 5020)
+++ glibc-package/branches/glibc-branch-squeeze/debian/patches/series
2011-10-30 17:05:36 UTC (rev 5021)
@@ -64,6 +64,7 @@
amd64/local-clone.diff
amd64/local-linuxthreads-gscope.diff
amd64/submitted-tst-audit6-avx.diff
+amd64/cvs-avx-detection.diff
arm/local-atomic.diff
arm/local-eabi-wchar.diff
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