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PKGBUILDs/core/glibc/0002-x86-Add-x86_64-to-x86-64-HWCAP-BZ-22093.patch
Kevin Mihelich f94ad3a0c7 core/glibc to 2.26-4
2017-09-13 19:26:25 +00:00

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From 45ff34638f034877b6a490c217d6a0632ce263f4 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Mon, 11 Sep 2017 08:18:11 -0700
Subject: [PATCH] x86: Add x86_64 to x86-64 HWCAP [BZ #22093]
Before glibc 2.26, ld.so set dl_platform to "x86_64" and searched the
"x86_64" subdirectory when loading a shared library. ld.so in glibc
2.26 was changed to set dl_platform to "haswell" or "xeon_phi", based
on supported ISAs. This led to shared library loading failure for
shared libraries placed under the "x86_64" subdirectory.
This patch adds "x86_64" to x86-64 dl_hwcap so that ld.so will always
search the "x86_64" subdirectory when loading a shared library.
NB: We can't set x86-64 dl_platform to "x86-64" since ld.so will skip
the "haswell" and "xeon_phi" subdirectories on "haswell" and "xeon_phi"
machines.
Tested on i686 and x86-64.
[BZ #22093]
* sysdeps/x86/cpu-features.c (init_cpu_features): Initialize
GLRO(dl_hwcap) to HWCAP_X86_64 for x86-64.
* sysdeps/x86/dl-hwcap.h (HWCAP_COUNT): Updated.
(HWCAP_IMPORTANT): Likewise.
(HWCAP_X86_64): New enum.
(HWCAP_X86_AVX512_1): Updated.
* sysdeps/x86/dl-procinfo.c (_dl_x86_hwcap_flags): Add "x86_64".
* sysdeps/x86_64/Makefile (tests): Add tst-x86_64-1.
(modules-names): Add x86_64/tst-x86_64mod-1.
(LDFLAGS-tst-x86_64mod-1.so): New.
($(objpfx)tst-x86_64-1): Likewise.
($(objpfx)x86_64/tst-x86_64mod-1.os): Likewise.
(tst-x86_64-1-clean): Likewise.
* sysdeps/x86_64/tst-x86_64-1.c: New file.
* sysdeps/x86_64/tst-x86_64mod-1.c: Likewise.
---
sysdeps/x86/cpu-features.c | 3 ++-
sysdeps/x86/dl-hwcap.h | 12 +++++++-----
sysdeps/x86/dl-procinfo.c | 4 ++--
sysdeps/x86_64/Makefile | 17 +++++++++++++++++
sysdeps/x86_64/tst-x86_64-1.c | 26 ++++++++++++++++++++++++++
sysdeps/x86_64/tst-x86_64mod-1.c | 22 ++++++++++++++++++++++
7 files changed, 76 insertions(+), 8 deletions(-)
create mode 100644 sysdeps/x86_64/tst-x86_64-1.c
create mode 100644 sysdeps/x86_64/tst-x86_64mod-1.c
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 6f900840d4..c267f17b76 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -336,7 +336,6 @@ no_cpuid:
/* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86. */
GLRO(dl_platform) = NULL;
- GLRO(dl_hwcap) = 0;
#if !HAVE_TUNABLES && defined SHARED
/* The glibc.tune.hwcap_mask tunable is initialized already, so no need to do
this. */
@@ -344,6 +343,7 @@ no_cpuid:
#endif
#ifdef __x86_64__
+ GLRO(dl_hwcap) = HWCAP_X86_64;
if (cpu_features->kind == arch_kind_intel)
{
if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable)
@@ -374,6 +374,7 @@ no_cpuid:
GLRO(dl_platform) = "haswell";
}
#else
+ GLRO(dl_hwcap) = 0;
if (CPU_FEATURES_CPU_P (cpu_features, SSE2))
GLRO(dl_hwcap) |= HWCAP_X86_SSE2;
diff --git a/sysdeps/x86/dl-hwcap.h b/sysdeps/x86/dl-hwcap.h
index c95668415a..38627e9eef 100644
--- a/sysdeps/x86/dl-hwcap.h
+++ b/sysdeps/x86/dl-hwcap.h
@@ -24,15 +24,16 @@
# define HWCAP_PLATFORMS_START 0
# define HWCAP_PLATFORMS_COUNT 4
# define HWCAP_START 0
-# define HWCAP_COUNT 2
-# define HWCAP_IMPORTANT (HWCAP_X86_SSE2 | HWCAP_X86_AVX512_1)
+# define HWCAP_COUNT 3
+# define HWCAP_IMPORTANT \
+ (HWCAP_X86_SSE2 | HWCAP_X86_64 | HWCAP_X86_AVX512_1)
#elif defined __x86_64__
/* For 64 bit, only cover x86-64 platforms and capabilities. */
# define HWCAP_PLATFORMS_START 2
# define HWCAP_PLATFORMS_COUNT 4
# define HWCAP_START 1
-# define HWCAP_COUNT 2
-# define HWCAP_IMPORTANT (HWCAP_X86_AVX512_1)
+# define HWCAP_COUNT 3
+# define HWCAP_IMPORTANT (HWCAP_X86_64 | HWCAP_X86_AVX512_1)
#else
/* For 32 bit, only cover i586, i686 and SSE2. */
# define HWCAP_PLATFORMS_START 0
@@ -45,7 +46,8 @@
enum
{
HWCAP_X86_SSE2 = 1 << 0,
- HWCAP_X86_AVX512_1 = 1 << 1
+ HWCAP_X86_64 = 1 << 1,
+ HWCAP_X86_AVX512_1 = 1 << 2
};
static inline const char *
diff --git a/sysdeps/x86/dl-procinfo.c b/sysdeps/x86/dl-procinfo.c
index 43ab8fe25b..0192feb850 100644
--- a/sysdeps/x86/dl-procinfo.c
+++ b/sysdeps/x86/dl-procinfo.c
@@ -58,11 +58,11 @@ PROCINFO_CLASS struct cpu_features _dl_x86_cpu_features
#if !defined PROCINFO_DECL && defined SHARED
._dl_x86_hwcap_flags
#else
-PROCINFO_CLASS const char _dl_x86_hwcap_flags[2][9]
+PROCINFO_CLASS const char _dl_x86_hwcap_flags[3][9]
#endif
#ifndef PROCINFO_DECL
= {
- "sse2", "avx512_1"
+ "sse2", "x86_64", "avx512_1"
}
#endif
#if !defined SHARED || defined PROCINFO_DECL
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index 7f3ffe34ba..1514805f4a 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -52,6 +52,12 @@ $(objpfx)tst-quad2pie: $(objpfx)tst-quadmod2pie.o
CFLAGS-tst-quad1pie.c = $(PIE-ccflag)
CFLAGS-tst-quad2pie.c = $(PIE-ccflag)
+tests += tst-x86_64-1
+modules-names += x86_64/tst-x86_64mod-1
+LDFLAGS-tst-x86_64mod-1.so = -Wl,-soname,tst-x86_64mod-1.so
+
+$(objpfx)tst-x86_64-1: $(objpfx)x86_64/tst-x86_64mod-1.so
+
tests += tst-audit3 tst-audit4 tst-audit5 tst-audit6 tst-audit7 \
tst-audit10 tst-sse tst-avx tst-avx512
test-extras += tst-audit4-aux tst-audit10-aux \
@@ -124,3 +130,14 @@ endif
ifeq ($(subdir),csu)
gen-as-const-headers += tlsdesc.sym rtld-offsets.sym
endif
+
+$(objpfx)x86_64/tst-x86_64mod-1.os: $(objpfx)tst-x86_64mod-1.os
+ $(make-target-directory)
+ rm -f $@
+ ln $< $@
+
+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
diff --git a/sysdeps/x86_64/tst-x86_64-1.c b/sysdeps/x86_64/tst-x86_64-1.c
new file mode 100644
index 0000000000..ba1a55cdaf
--- /dev/null
+++ b/sysdeps/x86_64/tst-x86_64-1.c
@@ -0,0 +1,26 @@
+/* Test searching the "x86_64" directory for shared libraries.
+ 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/>. */
+
+extern void foo (void);
+
+int
+main (void)
+{
+ foo ();
+ return 0;
+}
diff --git a/sysdeps/x86_64/tst-x86_64mod-1.c b/sysdeps/x86_64/tst-x86_64mod-1.c
new file mode 100644
index 0000000000..83dfafb5a8
--- /dev/null
+++ b/sysdeps/x86_64/tst-x86_64mod-1.c
@@ -0,0 +1,22 @@
+/* Test searching the "x86_64" directory for shared libraries.
+ 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/>. */
+
+void
+foo (void)
+{
+}
--
2.13.2
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