diff --git a/sysdeps/unix/sysv/linux/x86_64/dl-plt-rewrite.h b/sysdeps/unix/sysv/linux/x86_64/dl-plt-rewrite.h
new file mode 100644
index 0000000000..ad637df930
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/dl-plt-rewrite.h
@@ -0,0 +1,43 @@
+/* PLT rewrite helper function. Linux/x86-64 version.
+ Copyright (C) 2024 Free Software Foundation, Inc.
+
+ 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
+ . */
+
+#include
+#include
+
+static __always_inline bool
+dl_plt_rewrite_supported (void)
+{
+ /* PLT rewrite is enabled. Check if mprotect works. */
+ void *plt = (void *) INTERNAL_SYSCALL_CALL (mmap, NULL, 4096,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS,
+ -1, 0);
+ if (__glibc_unlikely (plt == MAP_FAILED))
+ return false;
+
+ /* Touch the PROT_READ | PROT_WRITE page. */
+ *(int32_t *) plt = 1;
+
+ /* If the updated PROT_READ | PROT_WRITE page can be changed to
+ PROT_EXEC | PROT_READ, rewrite PLT. */
+ bool status = (INTERNAL_SYSCALL_CALL (mprotect, plt, 4096,
+ PROT_EXEC | PROT_READ) == 0);
+
+ INTERNAL_SYSCALL_CALL (munmap, plt, 4096);
+
+ return status;
+}
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 46bdaffbc2..25e6622a79 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -28,10 +28,16 @@ extern void TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *)
attribute_hidden;
#if defined SHARED && defined __x86_64__
+# include
+
static void
TUNABLE_CALLBACK (set_plt_rewrite) (tunable_val_t *valp)
{
- if (valp->numval != 0)
+ /* We must be careful about where we put the call to
+ dl_plt_rewrite_supported() since it may generate
+ spurious SELinux log entries. It should only be
+ attempted if the user requested a PLT rewrite. */
+ if (valp->numval != 0 && dl_plt_rewrite_supported ())
{
/* Use JMPABS only on APX processors. */
const struct cpu_features *cpu_features = __get_cpu_features ();
diff --git a/sysdeps/x86_64/dl-plt-rewrite.h b/sysdeps/x86_64/dl-plt-rewrite.h
new file mode 100644
index 0000000000..cab6fe75ea
--- /dev/null
+++ b/sysdeps/x86_64/dl-plt-rewrite.h
@@ -0,0 +1,25 @@
+/* PLT rewrite helper function. x86-64 version.
+ Copyright (C) 2024 Free Software Foundation, Inc.
+
+ 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
+ . */
+
+#include
+#include
+
+static __always_inline bool
+dl_plt_rewrite_supported (void)
+{
+ return true;
+}