65 lines
2.0 KiB
Diff
65 lines
2.0 KiB
Diff
Downstream-only patch to enhance CPU detection. Review thread:
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<https://sourceware.org/pipermail/libc-alpha/2021-May/125916.html>
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Thu May 6 11:54:52 2021 +0200
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elf: Add hook for checking HWCAP bits after auxiliary vector parsing
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diff --git a/elf/dl-sysdep.c b/elf/dl-sysdep.c
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index 0658c17da632efa5..657d74597e64045f 100644
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--- a/elf/dl-sysdep.c
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+++ b/elf/dl-sysdep.c
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@@ -46,6 +46,7 @@
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#include <dl-tunables.h>
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#include <dl-auxv.h>
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+#include <dl-hwcap-check.h>
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extern char **_environ attribute_hidden;
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extern char _end[] attribute_hidden;
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@@ -182,6 +183,8 @@ _dl_sysdep_start (void **start_argptr,
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DL_PLATFORM_AUXV
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}
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+ dl_hwcap_check ();
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+
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#ifndef HAVE_AUX_SECURE
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if (seen != -1)
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{
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diff --git a/sysdeps/generic/dl-hwcap-check.h b/sysdeps/generic/dl-hwcap-check.h
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new file mode 100644
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index 0000000000000000..8db7a86256c9c724
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--- /dev/null
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+++ b/sysdeps/generic/dl-hwcap-check.h
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@@ -0,0 +1,28 @@
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+/* Check for hardware capabilities after HWCAP parsing. Generic version.
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+ Copyright (C) 2021 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#ifndef _DL_HWCAP_CHECK_H
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+#define _DL_HWCAP_CHECK_H
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+
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+static inline void
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+dl_hwcap_check (void)
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+{
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+ /* The generic implementation does not perform any checks. */
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+}
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+
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+#endif /* _DL_HWCAP_CHECK_H */
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