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GNU C Library master sources branch release/2.26/master updated. glibc-2.26-73-g4b692df
- From: hjl at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 26 Oct 2017 15:09:56 -0000
- Subject: GNU C Library master sources branch release/2.26/master updated. glibc-2.26-73-g4b692df
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=4b692dffb95ac4812b161eb6a16113d7e824982e
commit 4b692dffb95ac4812b161eb6a16113d7e824982e
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Thu Oct 19 08:28:09 2017 -0700
x86-64: Don't set GLRO(dl_platform) to NULL [BZ #22299]
Since ld.so expands $PLATFORM with GLRO(dl_platform), don't set
GLRO(dl_platform) to NULL.
[BZ #22299]
* sysdeps/x86/cpu-features.c (init_cpu_features): Don't set
GLRO(dl_platform) to NULL.
* sysdeps/x86_64/Makefile (tests): Add tst-platform-1.
(modules-names): Add tst-platformmod-1 and
x86_64/tst-platformmod-2.
(CFLAGS-tst-platform-1.c): New.
(CFLAGS-tst-platformmod-1.c): Likewise.
(CFLAGS-tst-platformmod-2.c): Likewise.
(LDFLAGS-tst-platformmod-2.so): Likewise.
($(objpfx)tst-platform-1): Likewise.
($(objpfx)tst-platform-1.out): Likewise.
(tst-platform-1-ENV): Likewise.
($(objpfx)x86_64/tst-platformmod-2.os): Likewise.
* sysdeps/x86_64/tst-platform-1.c: New file.
* sysdeps/x86_64/tst-platformmod-1.c: Likewise.
* sysdeps/x86_64/tst-platformmod-2.c: Likewise.
(cherry picked from commit 4d916f0f12b230f49967797f98b2b613c734a047)
diff --git a/ChangeLog b/ChangeLog
index 366eaba..26ebb2e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,24 @@
+2017-10-26 Valery Reznic <valery_reznic@yahoo.com>
+ H.J. Lu <hongjiu.lu@intel.com>
+
+ [BZ #22299]
+ * sysdeps/x86/cpu-features.c (init_cpu_features): Don't set
+ GLRO(dl_platform) to NULL.
+ * sysdeps/x86_64/Makefile (tests): Add tst-platform-1.
+ (modules-names): Add tst-platformmod-1 and
+ x86_64/tst-platformmod-2.
+ (CFLAGS-tst-platform-1.c): New.
+ (CFLAGS-tst-platformmod-1.c): Likewise.
+ (CFLAGS-tst-platformmod-2.c): Likewise.
+ (LDFLAGS-tst-platformmod-2.so): Likewise.
+ ($(objpfx)tst-platform-1): Likewise.
+ ($(objpfx)tst-platform-1.out): Likewise.
+ (tst-platform-1-ENV): Likewise.
+ ($(objpfx)x86_64/tst-platformmod-2.os): Likewise.
+ * sysdeps/x86_64/tst-platform-1.c: New file.
+ * sysdeps/x86_64/tst-platformmod-1.c: Likewise.
+ * sysdeps/x86_64/tst-platformmod-2.c: Likewise.
+
2017-10-23 Alexey Makhalov <amakhalov@vmware.com>
* elf/dl-tunables.c (do_tunable_update_val): Range checking fix.
diff --git a/NEWS b/NEWS
index cd6636d..ea1c1f1 100644
--- a/NEWS
+++ b/NEWS
@@ -47,6 +47,7 @@ The following bugs are resolved with this release:
[22225] math: nearbyint arithmetic moved before feholdexcept
[22235] Add C++ versions of iscanonical for ldbl-96 and ldbl-128ibm
[22296] Let signbit use the builtin in C++ mode with gcc < 6.x
+ [22299] x86-64: Don't set GLRO(dl_platform) to NULL
[22320] glob: Fix one-byte overflow (CVE-2017-15670)
[22321] sysconf: Fix missing definition of UIO_MAXIOV on Linux
[22322] libc: [mips64] wrong bits/long-double.h installed
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 3a5c3e8..87aaa86 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -389,7 +389,6 @@ no_cpuid:
#endif
/* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86. */
- GLRO(dl_platform) = NULL;
#if !HAVE_TUNABLES && defined SHARED
/* The glibc.tune.hwcap_mask tunable is initialized already, so no need to do
this. */
@@ -400,13 +399,15 @@ no_cpuid:
GLRO(dl_hwcap) = HWCAP_X86_64;
if (cpu_features->kind == arch_kind_intel)
{
+ const char *platform = NULL;
+
if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable)
&& CPU_FEATURES_CPU_P (cpu_features, AVX512CD))
{
if (CPU_FEATURES_CPU_P (cpu_features, AVX512ER))
{
if (CPU_FEATURES_CPU_P (cpu_features, AVX512PF))
- GLRO(dl_platform) = "xeon_phi";
+ platform = "xeon_phi";
}
else
{
@@ -417,7 +418,7 @@ no_cpuid:
}
}
- if (GLRO(dl_platform) == NULL
+ if (platform == NULL
&& CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable)
&& CPU_FEATURES_ARCH_P (cpu_features, FMA_Usable)
&& CPU_FEATURES_CPU_P (cpu_features, BMI1)
@@ -425,7 +426,10 @@ no_cpuid:
&& CPU_FEATURES_CPU_P (cpu_features, LZCNT)
&& CPU_FEATURES_CPU_P (cpu_features, MOVBE)
&& CPU_FEATURES_CPU_P (cpu_features, POPCNT))
- GLRO(dl_platform) = "haswell";
+ platform = "haswell";
+
+ if (platform != NULL)
+ GLRO(dl_platform) = platform;
}
#else
GLRO(dl_hwcap) = 0;
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index cb4e638..a7e26ac 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -62,6 +62,21 @@ endif
$(objpfx)tst-x86_64-1: $(objpfx)x86_64/tst-x86_64mod-1.so
+ifneq (no,$(have-tunables))
+tests += tst-platform-1
+modules-names += tst-platformmod-1 x86_64/tst-platformmod-2
+CFLAGS-tst-platform-1.c = -mno-avx
+CFLAGS-tst-platformmod-1.c = -mno-avx
+CFLAGS-tst-platformmod-2.c = -mno-avx
+LDFLAGS-tst-platformmod-2.so = -Wl,-soname,tst-platformmod-2.so
+$(objpfx)tst-platform-1: $(objpfx)tst-platformmod-1.so
+$(objpfx)tst-platform-1.out: $(objpfx)x86_64/tst-platformmod-2.so
+# Turn off AVX512F_Usable and AVX2_Usable so that GLRO(dl_platform) is
+# always set to x86_64.
+tst-platform-1-ENV = LD_PRELOAD=$(objpfx)\$$PLATFORM/tst-platformmod-2.so \
+ GLIBC_TUNABLES=glibc.tune.hwcaps=-AVX512F_Usable,-AVX2_Usable
+endif
+
tests += tst-audit3 tst-audit4 tst-audit5 tst-audit6 tst-audit7 \
tst-audit10 tst-sse tst-avx tst-avx512
test-extras += tst-audit4-aux tst-audit10-aux \
@@ -143,3 +158,8 @@ do-tests-clean common-mostlyclean: tst-x86_64-1-clean
.PHONY: tst-x86_64-1-clean
tst-x86_64-1-clean:
-rm -rf $(objpfx)x86_64
+
+$(objpfx)x86_64/tst-platformmod-2.os: $(objpfx)tst-platformmod-2.os
+ $(make-target-directory)
+ rm -f $@
+ ln $< $@
diff --git a/sysdeps/x86_64/tst-platform-1.c b/sysdeps/x86_64/tst-platform-1.c
new file mode 100644
index 0000000..76a02e4
--- /dev/null
+++ b/sysdeps/x86_64/tst-platform-1.c
@@ -0,0 +1,29 @@
+/* Test PRELOAD with $PLATFORM.
+ Copyright (C) 2017 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <stdlib.h>
+
+extern int preload (void);
+
+static int
+do_test (void)
+{
+ return preload () == 0x1234 ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/x86_64/tst-platformmod-1.c b/sysdeps/x86_64/tst-platformmod-1.c
new file mode 100644
index 0000000..9ef5e2b
--- /dev/null
+++ b/sysdeps/x86_64/tst-platformmod-1.c
@@ -0,0 +1,23 @@
+/* Test PRELOAD with $PLATFORM.
+ Copyright (C) 2017 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+int
+preload (void)
+{
+ return 0;
+}
diff --git a/sysdeps/x86_64/tst-platformmod-2.c b/sysdeps/x86_64/tst-platformmod-2.c
new file mode 100644
index 0000000..d0e5103
--- /dev/null
+++ b/sysdeps/x86_64/tst-platformmod-2.c
@@ -0,0 +1,23 @@
+/* Test PRELOAD with $PLATFORM.
+ Copyright (C) 2017 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+int
+preload (void)
+{
+ return 0x1234;
+}
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 21 +++++++++++++++++++++
NEWS | 1 +
sysdeps/x86/cpu-features.c | 12 ++++++++----
sysdeps/x86_64/Makefile | 20 ++++++++++++++++++++
sysdeps/x86_64/tst-platform-1.c | 29 +++++++++++++++++++++++++++++
sysdeps/x86_64/tst-platformmod-1.c | 23 +++++++++++++++++++++++
sysdeps/x86_64/tst-platformmod-2.c | 23 +++++++++++++++++++++++
7 files changed, 125 insertions(+), 4 deletions(-)
create mode 100644 sysdeps/x86_64/tst-platform-1.c
create mode 100644 sysdeps/x86_64/tst-platformmod-1.c
create mode 100644 sysdeps/x86_64/tst-platformmod-2.c
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