18 files changed, 604 insertions, 97 deletions

diff --git a/elf/elf.h b/elf/elf.h
index c0f6148..1e1a59c 100644
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -837,12 +837,15 @@ typedef struct
 #define NT_ARM_ZT	0x40d		/* ARM SME ZT registers.  */
 #define NT_ARM_FPMR	0x40e		/* ARM floating point mode register.  */
 #define NT_ARM_POE	0x40f		/* ARM POE registers.  */
+#define NT_ARM_GCS	0x410		/* ARM GCS state.  */
 #define NT_VMCOREDD	0x700		/* Vmcore Device Dump Note.  */
 #define NT_MIPS_DSP	0x800		/* MIPS DSP ASE registers.  */
 #define NT_MIPS_FP_MODE	0x801		/* MIPS floating-point mode.  */
 #define NT_MIPS_MSA	0x802		/* MIPS SIMD registers.  */
 #define NT_RISCV_CSR	0x900		/* RISC-V Control and Status Registers */
 #define NT_RISCV_VECTOR	0x901		/* RISC-V vector registers */
+#define NT_RISCV_TAGGED_ADDR_CTRL	0x902	/* RISC-V tagged
+						   address control */
 #define NT_LOONGARCH_CPUCFG	0xa00	/* LoongArch CPU config registers.  */
 #define NT_LOONGARCH_CSR	0xa01	/* LoongArch control and
 					   status registers.  */
diff --git a/hurd/Makefile b/hurd/Makefile
index cf70b8c..cbc3c23 100644
--- a/hurd/Makefile
+++ b/hurd/Makefile
@@ -19,6 +19,11 @@ subdir := hurd
 
 include ../Makeconfig
 
+tests := test-sig-xstate \
+	test-sig-rpc-interrupted
+$(objpfx)test-sig-xstate: $(shared-thread-library)
+$(objpfx)test-sig-rpc-interrupted: $(shared-thread-library) $(objdir)/hurd/libhurduser.so
+
 headers = \
   $(interface-headers) \
   hurd.h \
diff --git a/hurd/test-sig-rpc-interrupted.c b/hurd/test-sig-rpc-interrupted.c
new file mode 100644
index 0000000..a89d70e
--- /dev/null
+++ b/hurd/test-sig-rpc-interrupted.c
@@ -0,0 +1,185 @@
+/* Test the state save/restore procedures during signal handling when an
+   interruptible RPC is restarted.
+
+   Copyright (C) 2024 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
+   <https://www.gnu.org/licenses/>.  */
+
+
+#include <assert.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <mach/message.h>
+#include <mach/gnumach.h>
+#include <mach/mach_traps.h>
+#include <mach/mig_errors.h>
+#include <mach-shortcuts.h>
+#include <mach_init.h>
+#include <hurd/io.h>
+#include <hurd/io_reply.h>
+
+#include <support/check.h>
+#include <support/xthread.h>
+
+#include "test-xstate.h"
+
+void handler (int signum, siginfo_t *info, void *context)
+{
+  printf ("signal %d setting a different CPU state\n", signum);
+  char buf3[XSTATE_BUFFER_SIZE];
+  memset (buf3, 0x77, XSTATE_BUFFER_SIZE);
+  SET_XSTATE (buf3);
+}
+
+static const mach_msg_type_t RetCodeCheck = {
+  .msgt_name =            (unsigned char) MACH_MSG_TYPE_INTEGER_32,
+  .msgt_size =            32,
+  .msgt_number =          1,
+  .msgt_inline =          TRUE,
+  .msgt_longform =        FALSE,
+  .msgt_deallocate =      FALSE,
+  .msgt_unused =          0
+};
+
+
+/* Helper thread to simulate a proper RPC interruption during dignal handling */
+void* fake_interruptor (void *arg)
+{
+  int err;
+  sigset_t ss;
+  TEST_COMPARE (sigemptyset (&ss), 0);
+  TEST_COMPARE (sigaddset (&ss, SIGUSR1), 0);
+  TEST_COMPARE (sigprocmask (SIG_BLOCK, &ss, NULL), 0);
+
+  struct {
+    mach_msg_header_t Head;
+  } request;
+  mach_port_t rxport = *((mach_port_t*)arg);
+  err = mach_msg (&request.Head, MACH_RCV_MSG, 0, sizeof (request), rxport,
+                  MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+  TEST_COMPARE (err, MACH_MSG_SUCCESS);
+  TEST_COMPARE (request.Head.msgh_bits, 0x1112);
+  TEST_COMPARE (request.Head.msgh_size, sizeof (request.Head));
+  TEST_COMPARE (request.Head.msgh_id, 33000);
+
+  mig_reply_header_t reply;
+  reply.Head = request.Head;
+  reply.Head.msgh_id += 100;
+  reply.RetCodeType = RetCodeCheck;
+  reply.RetCode = KERN_SUCCESS;
+  err = mach_msg (&reply.Head, MACH_SEND_MSG, sizeof (reply), 0, MACH_PORT_NULL,
+                  MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+  TEST_COMPARE (err, MACH_MSG_SUCCESS);
+
+  return NULL;
+}
+
+
+/* Helper thread to send a signal to the main thread in the middle of
+ * an interruptible rpc */
+void* signal_sender (void *arg)
+{
+  int err;
+  sigset_t ss;
+  TEST_COMPARE (sigemptyset (&ss), 0);
+  TEST_COMPARE (sigaddset (&ss, SIGUSR1), 0);
+  TEST_COMPARE (sigprocmask (SIG_BLOCK, &ss, NULL), 0);
+
+  /* Receive the first request, we won't answer to this. */
+  struct {
+    mach_msg_header_t head;
+    char data[64];
+  } m1, m2;
+  mach_port_t rxport = *((mach_port_t*)arg);
+  memset (&m1, 0, sizeof (m1));
+  memset (&m2, 0, sizeof (m2));
+  err = mach_msg (&m1.head, MACH_RCV_MSG, 0, sizeof (m1), rxport,
+                  MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+  TEST_COMPARE (err, MACH_MSG_SUCCESS);
+
+  /* interrupt the ongoing rpc with a signal, using the
+   * interruptible rpc protocol */
+  pthread_t thintr = xpthread_create (NULL, fake_interruptor, arg);
+  TEST_COMPARE (kill (getpid (), SIGUSR1), 0);
+  xpthread_join (thintr);
+
+  /* Complete the interruption by sending EINTR */
+  mig_reply_header_t reply;
+  reply.Head = m1.head;
+  reply.Head.msgh_id += 100;
+  reply.RetCodeType = RetCodeCheck;
+  reply.RetCode = EINTR;
+  err = mach_msg (&reply.Head, MACH_SEND_MSG, sizeof (reply), 0, MACH_PORT_NULL,
+                  MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+  TEST_COMPARE (err, MACH_MSG_SUCCESS);
+
+  /* Receive the retried rpc, and check that it has the same payload
+   * as the first one. Port names might still be different. */
+  err = mach_msg (&m2.head, MACH_RCV_MSG, 0, sizeof (m2), rxport,
+                  MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+  TEST_COMPARE (m1.head.msgh_bits, m2.head.msgh_bits);
+  TEST_COMPARE (m1.head.msgh_size, m2.head.msgh_size);
+  TEST_COMPARE (m1.head.msgh_id, m2.head.msgh_id);
+  TEST_COMPARE_BLOB (m1.data, sizeof (m1.data), m2.data, sizeof (m2.data));
+
+  /* And finally make the rpc succeed by sending a valid reply */
+  err = io_read_reply (m2.head.msgh_remote_port, MACH_MSG_TYPE_MOVE_SEND_ONCE,
+                       KERN_SUCCESS, NULL, 0);
+  TEST_COMPARE (err, MACH_MSG_SUCCESS);
+
+  return NULL;
+}
+
+
+static int do_test (void)
+{
+#if ! XSTATE_HELPERS_SUPPORTED
+  FAIL_UNSUPPORTED ("Test not supported on this arch.");
+#endif
+
+  /* Setup signal handling; we need to handle the signal in the main
+   * thread, the other ones will explicitely block SIGUSR1. */
+  struct sigaction act = { 0 };
+  act.sa_flags = SA_RESTART;
+  act.sa_sigaction = &handler;
+  TEST_COMPARE (sigaction (SIGUSR1, &act, NULL), 0);
+
+  mach_port_t fakeio;
+  int err;
+  err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE, &fakeio);
+  TEST_COMPARE (err, MACH_MSG_SUCCESS);
+
+  err = mach_port_insert_right (mach_task_self (), fakeio, fakeio,
+                                MACH_MSG_TYPE_MAKE_SEND);
+  TEST_COMPARE (err, MACH_MSG_SUCCESS);
+
+  pthread_t thsender = xpthread_create (NULL, signal_sender, &fakeio);
+
+  char *buf;
+  mach_msg_type_number_t n;
+  TEST_COMPARE (io_read (fakeio, &buf, &n, 1, 2), 0);
+
+  xpthread_join (thsender);
+  return EXIT_SUCCESS;
+}
+
+#include <support/test-driver.c>
diff --git a/hurd/test-sig-xstate.c b/hurd/test-sig-xstate.c
new file mode 100644
index 0000000..0a68a44
--- /dev/null
+++ b/hurd/test-sig-xstate.c
@@ -0,0 +1,94 @@
+/* Test the state save/restore procedures during signal handling.
+
+   Copyright (C) 2025 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
+   <https://www.gnu.org/licenses/>.  */
+
+
+#include <assert.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <mach/message.h>
+#include <mach/gnumach.h>
+#include <mach/mach_traps.h>
+#include <mach-shortcuts.h>
+#include <mach_init.h>
+#include <hurd/io.h>
+#include <hurd/io_reply.h>
+
+#include <support/check.h>
+#include <support/xthread.h>
+
+#include "test-xstate.h"
+
+static volatile bool loopflag = true;
+
+void handler (int signum, siginfo_t *info, void *context)
+{
+  char buf3[XSTATE_BUFFER_SIZE];
+  memset (buf3, 0x77, XSTATE_BUFFER_SIZE);
+  SET_XSTATE (buf3);
+  printf ("signal %d setting a different CPU state\n", signum);
+  loopflag = false;
+}
+
+/* Helper thread to send a signal to the main thread  */
+void* signal_sender (void *arg)
+{
+  sigset_t ss;
+  assert (! sigemptyset (&ss));
+  assert (! sigaddset (&ss, SIGUSR1));
+  assert (! sigprocmask (SIG_BLOCK, &ss, NULL));
+
+  TEST_COMPARE (kill (getpid (), SIGUSR1), 0);
+
+  return NULL;
+}
+
+static int do_test (void)
+{
+#if ! XSTATE_HELPERS_SUPPORTED
+  FAIL_UNSUPPORTED ("Test not supported on this arch.");
+#endif
+
+  struct sigaction act = { 0 };
+  act.sa_sigaction = &handler;
+  TEST_COMPARE (sigaction (SIGUSR1, &act, NULL), 0);
+
+  pthread_t thsender = xpthread_create (NULL, signal_sender, NULL);
+
+  char buf1[XSTATE_BUFFER_SIZE], buf2[XSTATE_BUFFER_SIZE];
+  memset (buf1, 0x33, XSTATE_BUFFER_SIZE);
+
+  SET_XSTATE (buf1);
+
+  while (loopflag)
+    ;
+
+  GET_XSTATE (buf2);
+  TEST_COMPARE_BLOB (buf1, sizeof (buf1), buf2, sizeof (buf2));
+
+  xpthread_join (thsender);
+  return EXIT_SUCCESS;
+}
+
+#include <support/test-driver.c>
diff --git a/hurd/test-xstate.h b/hurd/test-xstate.h
new file mode 100644
index 0000000..a8185dc
--- /dev/null
+++ b/hurd/test-xstate.h
@@ -0,0 +1,40 @@
+/* Helpers to test XSTATE during signal handling
+
+   Copyright (C) 2025 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _TEST_XSTATE_H
+#define _TEST_XSTATE_H
+
+#if defined __x86_64__ || defined __i386__
+#define XSTATE_HELPERS_SUPPORTED 1
+#define XSTATE_BUFFER_SIZE 16
+#define SET_XSTATE(b) do {                                    \
+    asm volatile ("movups (%0),%%xmm0" :: "r" (b));           \
+  } while (0)
+
+#define GET_XSTATE(b) do {                                    \
+    asm volatile ("movups %%xmm0,(%0)" :: "r" (b));           \
+  } while (0)
+
+#else
+#define XSTATE_HELPERS_SUPPORTED 0
+#define XSTATE_BUFFER_SIZE 1
+#define SET_XSTATE(b)
+#endif
+
+#endif /* _TEST_XSTATE_H */
diff --git a/libio/stdio.h b/libio/stdio.h
index 4436525..d042b36 100644
--- a/libio/stdio.h
+++ b/libio/stdio.h
@@ -168,8 +168,11 @@ extern int renameat (int __oldfd, const char *__old, int __newfd,
 #ifdef __USE_GNU
 /* Flags for renameat2.  */
 # define RENAME_NOREPLACE (1 << 0)
+# define AT_RENAME_NOREPLACE RENAME_NOREPLACE
 # define RENAME_EXCHANGE (1 << 1)
+# define AT_RENAME_EXCHANGE RENAME_EXCHANGE
 # define RENAME_WHITEOUT (1 << 2)
+# define AT_RENAME_WHITEOUT RENAME_WHITEOUT
 
 /* Rename file OLD relative to OLDFD to NEW relative to NEWFD, with
    additional flags.  */
diff --git a/sysdeps/mach/hurd/futimens.c b/sysdeps/mach/hurd/futimens.c
index 30ef0a6..1212529 100644
--- a/sysdeps/mach/hurd/futimens.c
+++ b/sysdeps/mach/hurd/futimens.c
@@ -32,7 +32,9 @@ __futimens (int fd, const struct timespec tsp[2])
   struct timespec atime, mtime;
   error_t err;
 
-  utime_ts_from_tspec (tsp, &atime, &mtime);
+  err = utime_ts_from_tspec (tsp, &atime, &mtime);
+  if (err)
+    return err;
 
   err = HURD_DPORT_USE (fd, __file_utimens (port, atime, mtime));
 
@@ -40,7 +42,9 @@ __futimens (int fd, const struct timespec tsp[2])
     {
       time_value_t atim, mtim;
 
-      utime_tvalue_from_tspec (tsp, &atim, &mtim);
+      err = utime_tvalue_from_tspec (tsp, &atim, &mtim);
+      if (err)
+	return err;
 
       err = HURD_DPORT_USE (fd, __file_utimes (port, atim, mtim));
   }
diff --git a/sysdeps/mach/hurd/futimes.c b/sysdeps/mach/hurd/futimes.c
index 20f47f3..97385d7 100644
--- a/sysdeps/mach/hurd/futimes.c
+++ b/sysdeps/mach/hurd/futimes.c
@@ -32,7 +32,9 @@ __futimes (int fd, const struct timeval tvp[2])
   struct timespec atime, mtime;
   error_t err;
 
-  utime_ts_from_tval (tvp, &atime, &mtime);
+  err = utime_ts_from_tval (tvp, &atime, &mtime);
+  if (err)
+    return err;
 
   err = HURD_DPORT_USE (fd, __file_utimens (port, atime, mtime));
 
@@ -40,7 +42,9 @@ __futimes (int fd, const struct timeval tvp[2])
     {
       time_value_t atim, mtim;
 
-      utime_tvalue_from_tval (tvp, &atim, &mtim);
+      err = utime_tvalue_from_tval (tvp, &atim, &mtim);
+      if (err)
+	return err;
 
       err = HURD_DPORT_USE (fd, __file_utimes (port, atim, mtim));
     }
diff --git a/sysdeps/mach/hurd/i386/bits/sigcontext.h b/sysdeps/mach/hurd/i386/bits/sigcontext.h
index 6e5e220..c44e4de 100644
--- a/sysdeps/mach/hurd/i386/bits/sigcontext.h
+++ b/sysdeps/mach/hurd/i386/bits/sigcontext.h
@@ -88,6 +88,8 @@ struct sigcontext
     struct i386_fp_save sc_fpsave;
     struct i386_fp_regs sc_fpregs;
     int sc_fpexcsr;		/* FPSR including exception bits.  */
+
+    struct i386_xfloat_state *xstate;
   };
 
 /* Traditional BSD names for some members.  */
diff --git a/sysdeps/mach/hurd/i386/sigreturn.c b/sysdeps/mach/hurd/i386/sigreturn.c
index ce8df8d..dc57d61 100644
--- a/sysdeps/mach/hurd/i386/sigreturn.c
+++ b/sysdeps/mach/hurd/i386/sigreturn.c
@@ -21,6 +21,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <cpuid.h>
+
 /* This is run on the thread stack after restoring it, to be able to
    unlock SS off sigstack.  */
 static void
@@ -123,10 +125,35 @@ __sigreturn (struct sigcontext *scp)
   if (scp->sc_onstack)
     ss->sigaltstack.ss_flags &= ~SS_ONSTACK;
 
-  if (scp->sc_fpused)
-    /* Restore the FPU state.  Mach conveniently stores the state
-       in the format the i387 `frstor' instruction uses to restore it.  */
-    asm volatile ("frstor %0" : : "m" (scp->sc_fpsave));
+#ifdef i386_XFLOAT_STATE
+  if (scp->xstate)
+    {
+      if (scp->xstate->initialized)
+	{
+	  unsigned eax, ebx, ecx, edx;
+	  __cpuid_count(0xd, 0, eax, ebx, ecx, edx);
+	  switch (scp->xstate->fp_save_kind)
+	    {
+	    case 0: // FNSAVE
+	      asm volatile("frstor %0" : : "m" (scp->xstate->hw_state));
+	      break;
+	    case 1: // FXSAVE
+	      asm volatile("fxrstor %0" : : "m" (scp->xstate->hw_state),    \
+			   "a" (eax), "d" (edx));
+	      break;
+	    default: // XSAVE, XSAVEOPT, XSAVEC, XSAVES
+	      asm volatile("xrstor %0" : : "m" (scp->xstate->hw_state),     \
+			   "a" (eax), "d" (edx));
+	      break;
+	    }
+	}
+    }
+  else
+#endif
+    if (scp->sc_fpused)
+      /* Restore the FPU state.  Mach conveniently stores the state
+         in the format the i387 `frstor' instruction uses to restore it.  */
+      asm volatile ("frstor %0" : : "m" (scp->sc_fpsave));
 
   {
     /* There are convenient instructions to pop state off the stack, so we
diff --git a/sysdeps/mach/hurd/symlinkat.c b/sysdeps/mach/hurd/symlinkat.c
index e7dfb67..cb6250e 100644
--- a/sysdeps/mach/hurd/symlinkat.c
+++ b/sysdeps/mach/hurd/symlinkat.c
@@ -47,7 +47,7 @@ __symlinkat (const char *from, int fd, const char *to)
 
   if (! *name)
     /* Can't link to the existing directory itself.  */
-    err = ENOTDIR;
+    err = EEXIST;
   else
     /* Create a new, unlinked node in the target directory.  */
     err = __dir_mkfile (dir, O_WRITE, 0777 & ~_hurd_umask, &node);
diff --git a/sysdeps/mach/hurd/utime-helper.c b/sysdeps/mach/hurd/utime-helper.c
index d88bccd..6afa871 100644
--- a/sysdeps/mach/hurd/utime-helper.c
+++ b/sysdeps/mach/hurd/utime-helper.c
@@ -21,8 +21,14 @@
 #include <stddef.h>
 #include <sys/time.h>
 
+static inline bool
+check_tval (const struct timeval *tvp)
+{
+  return tvp->tv_usec >= 0 && tvp->tv_usec < USEC_PER_SEC;
+}
+
 /* Initializes atime/mtime timespec structures from an array of timeval.  */
-static inline void
+static inline error_t
 utime_ts_from_tval (const struct timeval tvp[2],
                     struct timespec *atime, struct timespec *mtime)
 {
@@ -37,13 +43,19 @@ utime_ts_from_tval (const struct timeval tvp[2],
     }
   else
     {
+      if (!check_tval (&tvp[0]))
+	return EINVAL;
+      if (!check_tval (&tvp[1]))
+	return EINVAL;
+
       TIMEVAL_TO_TIMESPEC (&tvp[0], atime);
       TIMEVAL_TO_TIMESPEC (&tvp[1], mtime);
     }
+  return 0;
 }
 
 /* Initializes atime/mtime time_value_t structures from an array of timeval.  */
-static inline void
+static inline error_t
 utime_tvalue_from_tval (const struct timeval tvp[2],
                         time_value_t *atime, time_value_t *mtime)
 {
@@ -53,11 +65,17 @@ utime_tvalue_from_tval (const struct timeval tvp[2],
     atime->microseconds = mtime->microseconds = -1;
   else
     {
+      if (!check_tval (&tvp[0]))
+	return EINVAL;
+      if (!check_tval (&tvp[1]))
+	return EINVAL;
+
       atime->seconds = tvp[0].tv_sec;
       atime->microseconds = tvp[0].tv_usec;
       mtime->seconds = tvp[1].tv_sec;
       mtime->microseconds = tvp[1].tv_usec;
     }
+  return 0;
 }
 
 /* Changes the access time of the file behind PORT using a timeval array.  */
@@ -67,7 +85,9 @@ hurd_futimes (const file_t port, const struct timeval tvp[2])
   error_t err;
   struct timespec atime, mtime;
 
-  utime_ts_from_tval (tvp, &atime, &mtime);
+  err = utime_ts_from_tval (tvp, &atime, &mtime);
+  if (err)
+    return err;
 
   err = __file_utimens (port, atime, mtime);
 
@@ -75,7 +95,9 @@ hurd_futimes (const file_t port, const struct timeval tvp[2])
     {
       time_value_t atim, mtim;
 
-      utime_tvalue_from_tval (tvp, &atim, &mtim);
+      err = utime_tvalue_from_tval (tvp, &atim, &mtim);
+      if (err)
+	return err;
 
       err = __file_utimes (port, atim, mtim);
     }
@@ -83,8 +105,16 @@ hurd_futimes (const file_t port, const struct timeval tvp[2])
   return err;
 }
 
+static inline bool
+check_tspec (const struct timespec *tsp)
+{
+  return tsp->tv_nsec == UTIME_NOW
+      || tsp->tv_nsec == UTIME_OMIT
+      || tsp->tv_nsec >= 0 && tsp->tv_nsec < NSEC_PER_SEC;
+}
+
 /* Initializes atime/mtime timespec structures from an array of timespec.  */
-static inline void
+static inline error_t
 utime_ts_from_tspec (const struct timespec tsp[2],
                      struct timespec *atime, struct timespec *mtime)
 {
@@ -99,13 +129,19 @@ utime_ts_from_tspec (const struct timespec tsp[2],
     }
   else
     {
+      if (!check_tspec (&tsp[0]))
+	return EINVAL;
+      if (!check_tspec (&tsp[1]))
+	return EINVAL;
+
       *atime = tsp[0];
       *mtime = tsp[1];
     }
+  return 0;
 }
 
 /* Initializes atime/mtime time_value_t structures from an array of timespec.  */
-static inline void
+static inline error_t
 utime_tvalue_from_tspec (const struct timespec tsp[2],
                          time_value_t *atime, time_value_t *mtime)
 {
@@ -115,6 +151,11 @@ utime_tvalue_from_tspec (const struct timespec tsp[2],
     atime->microseconds = mtime->microseconds = -1;
   else
     {
+      if (!check_tspec (&tsp[0]))
+	return EINVAL;
+      if (!check_tspec (&tsp[1]))
+	return EINVAL;
+
       if (tsp[0].tv_nsec == UTIME_NOW)
 	atime->microseconds = -1;
       else if (tsp[0].tv_nsec == UTIME_OMIT)
@@ -128,6 +169,7 @@ utime_tvalue_from_tspec (const struct timespec tsp[2],
       else
 	TIMESPEC_TO_TIME_VALUE (mtime, &(tsp[1]));
     }
+  return 0;
 }
 
 /* Changes the access time of the file behind PORT using a timespec array.  */
@@ -137,7 +179,9 @@ hurd_futimens (const file_t port, const struct timespec tsp[2])
   error_t err;
   struct timespec atime, mtime;
 
-  utime_ts_from_tspec (tsp, &atime, &mtime);
+  err = utime_ts_from_tspec (tsp, &atime, &mtime);
+  if (err)
+    return err;
 
   err = __file_utimens (port, atime, mtime);
 
@@ -145,7 +189,9 @@ hurd_futimens (const file_t port, const struct timespec tsp[2])
     {
       time_value_t atim, mtim;
 
-      utime_tvalue_from_tspec (tsp, &atim, &mtim);
+      err = utime_tvalue_from_tspec (tsp, &atim, &mtim);
+      if (err)
+	return err;
 
       err = __file_utimes (port, atim, mtim);
     }
diff --git a/sysdeps/mach/hurd/x86/trampoline.c b/sysdeps/mach/hurd/x86/trampoline.c
index 8e2890f..6f23c56 100644
--- a/sysdeps/mach/hurd/x86/trampoline.c
+++ b/sysdeps/mach/hurd/x86/trampoline.c
@@ -26,7 +26,11 @@
 #include "hurdfault.h"
 #include <intr-msg.h>
 #include <sys/ucontext.h>
-
+#ifdef __x86_64__
+#include <mach/x86_64/mach_i386.h>
+#else
+#include <mach/i386/mach_i386.h>
+#endif
 
 /* Fill in a siginfo_t structure for SA_SIGINFO-enabled handlers.  */
 static void fill_siginfo (siginfo_t *si, int signo,
@@ -106,6 +110,7 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const struct sigaction *action
   void firewall (void);
   void *sigsp;
   struct sigcontext *scp;
+  vm_size_t xstate_size;
   struct
     {
       union
@@ -145,6 +150,14 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const struct sigaction *action
       struct hurd_userlink link;
       ucontext_t ucontext;
       siginfo_t siginfo;
+#ifdef __x86_64__
+      char _pad2[56];
+#else
+      char _pad2[20];
+#endif
+      char xstate[];
+      /* Don't add anything after xstate, as it's dynamically
+         sized. */
     } *stackframe;
 
 #ifdef __x86_64__
@@ -170,6 +183,17 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const struct sigaction *action
   if (! machine_get_basic_state (ss->thread, state))
     return NULL;
 
+  /* Initialize the size of the CPU extended state, to be saved during
+   * signal handling */
+#ifdef i386_XFLOAT_STATE
+  _Static_assert ((sizeof(*stackframe) + sizeof(struct i386_xfloat_state)) % 64 == 0,
+                  "stackframe size must be multiple of 64-byte minus "
+                  "sizeof(struct i386_xfloat_state), please adjust _pad2");
+
+  if (__i386_get_xstate_size(__mach_host_self(), &xstate_size))
+#endif
+    xstate_size = 0;
+
   /* Save the original SP in the gratuitous `esp' slot.
      We may need to reset the SP (the `uesp' slot) to avoid clobbering an
      interrupted RPC frame.  */
@@ -196,14 +220,21 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const struct sigaction *action
 #endif
     }
 
-  /* Push the arguments to call `trampoline' on the stack.  */
-  sigsp -= sizeof (*stackframe);
-#ifdef __x86_64__
-  /* Align SP at 16 bytes.  Coupled with the fact that sigreturn_addr is
-     16-byte aligned within the stackframe struct, this ensures that it ends
-     up on a 16-byte aligned address, as required by the ABI.  */
-  sigsp = (void *) ((uintptr_t) sigsp & ~15UL);
-#endif
+  /* Push the arguments to call `trampoline' on the stack.
+   * The extended state might have a variable size depending on the platform,
+   * so we dynamically allocate it on the stack frame.*/
+  sigsp -= sizeof (*stackframe) + xstate_size;
+
+  /* Align SP at 64 bytes. This is needed for two reasons:
+   * - sigreturn_addr is 16-byte aligned within the stackframe
+   *   struct, and this ensures that it ends up on a 16-byte aligned
+   *   address, as required by the ABI.
+   * - the XSAVE state needs to be aligned at 64 bytes (on both i386 and
+   *   x86_64), so we align the stackframe also at 64 bytes and add the
+   *   required padding at the end, see the _pad2 field.
+   */
+  sigsp = (void *) ((uintptr_t) sigsp & ~63UL);
+
   stackframe = sigsp;
 
   if (_hurdsig_catch_memory_fault (stackframe))
@@ -248,14 +279,40 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const struct sigaction *action
       memcpy (&scp->sc_i386_thread_state,
 	      &state->basic, sizeof (state->basic));
 
-      /* struct sigcontext is laid out so that starting at sc_fpkind mimics
-	 a struct i386_float_state.  */
-      _Static_assert (offsetof (struct sigcontext, sc_i386_float_state)
-		      % __alignof__ (struct i386_float_state) == 0,
-		      "sc_i386_float_state layout mismatch");
-      ok = machine_get_state (ss->thread, state, i386_FLOAT_STATE,
-			      &state->fpu, &scp->sc_i386_float_state,
-			      sizeof (state->fpu));
+      scp->xstate = NULL;
+#ifdef i386_XFLOAT_STATE
+      if (xstate_size > 0)
+        {
+          mach_msg_type_number_t got = (xstate_size / sizeof (int));
+
+          ok = (! __thread_get_state (ss->thread, i386_XFLOAT_STATE,
+                                      (thread_state_t) stackframe->xstate, &got)
+                && got == (xstate_size / sizeof (int)));
+
+	  if (ok && ((struct i386_xfloat_state*) stackframe->xstate)->fp_save_kind > 5)
+	    /* We support up to XSAVES */
+	    ok = 0;
+
+          if (ok)
+	    {
+	      scp->xstate = (struct i386_xfloat_state*) stackframe->xstate;
+	      assert((uintptr_t)scp->xstate->hw_state % 64 == 0);
+	    }
+        }
+      else
+#endif
+        ok = 0;
+      if (!ok)
+        {
+          /* struct sigcontext is laid out so that starting at sc_fpkind mimics
+            a struct i386_float_state.  */
+          _Static_assert (offsetof (struct sigcontext, sc_i386_float_state)
+                         % __alignof__ (struct i386_float_state) == 0,
+                         "sc_i386_float_state layout mismatch");
+          ok = machine_get_state (ss->thread, state, i386_FLOAT_STATE,
+                                 &state->fpu, &scp->sc_i386_float_state,
+                                 sizeof (state->fpu));
+        }
 
       /* Set up the arguments for the signal handler.  */
       stackframe->signo = signo;
@@ -404,7 +461,10 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const struct sigaction *action
    - in gdb: gdb/i386-gnu-tdep.c gnu_sigtramp_code.  */
 
 #ifdef __x86_64__
-asm ("rpc_wait_trampoline:\n"
+asm ("trampoline:\n"
+     "fnclex\n"			/* Clear any pending exception.  */
+     "jmp _trampoline\n"
+     "rpc_wait_trampoline:\n"
   /* This is the entry point when we have an RPC reply message to receive
      before running the handler.  The MACH_MSG_SEND bit has already been
      cleared in the OPTION argument in our %rsi.  The interrupted user
@@ -423,7 +483,7 @@ asm ("rpc_wait_trampoline:\n"
      /* Switch to the signal stack.  */
      "movq %rbx, %rsp\n"
 
-     "trampoline:\n"
+     "_trampoline:\n"
      /* Entry point for running the handler normally.  The arguments to the
         handler function are on the top of the stack, same as in the i386
         version:
@@ -449,7 +509,10 @@ asm ("rpc_wait_trampoline:\n"
      "movq 16(%rsp), %rdi\n"
      "ret");
 #else
-asm ("rpc_wait_trampoline:\n");
+asm ("trampoline:\n"
+     "fnclex\n"			/* Clear any pending exception.  */
+     "jmp _trampoline\n"
+     "rpc_wait_trampoline:\n");
   /* This is the entry point when we have an RPC reply message to receive
      before running the handler.  The MACH_MSG_SEND bit has already been
      cleared in the OPTION argument on our stack.  The interrupted user
@@ -469,7 +532,7 @@ asm (/* Retry the interrupted mach_msg system call.  */
      /* Switch to the signal stack.  */
      "movl %ebx, %esp\n");
 
- asm ("trampoline:\n");
+asm ("_trampoline:\n");
   /* Entry point for running the handler normally.  The arguments to the
      handler function are already on the top of the stack:
 
diff --git a/sysdeps/mach/hurd/x86_64/bits/sigcontext.h b/sysdeps/mach/hurd/x86_64/bits/sigcontext.h
index 7bac881..d83795f 100644
--- a/sysdeps/mach/hurd/x86_64/bits/sigcontext.h
+++ b/sysdeps/mach/hurd/x86_64/bits/sigcontext.h
@@ -96,6 +96,8 @@ struct sigcontext
     struct i386_fp_save sc_fpsave;
     struct i386_fp_regs sc_fpregs;
     int sc_fpexcsr;		/* FPSR including exception bits.  */
+
+    struct i386_xfloat_state *xstate;
   };
 
 /* Traditional BSD names for some members.  */
diff --git a/sysdeps/mach/hurd/x86_64/sigreturn.c b/sysdeps/mach/hurd/x86_64/sigreturn.c
index 81a2d3b..773c00f 100644
--- a/sysdeps/mach/hurd/x86_64/sigreturn.c
+++ b/sysdeps/mach/hurd/x86_64/sigreturn.c
@@ -20,6 +20,8 @@
 #include <hurd/msg.h>
 #include <stdlib.h>
 
+#include <cpuid.h>
+
 /* This is run on the thread stack after restoring it, to be able to
    unlock SS off sigstack.  */
 void
@@ -116,10 +118,35 @@ __sigreturn (struct sigcontext *scp)
   if (scp->sc_onstack)
     ss->sigaltstack.ss_flags &= ~SS_ONSTACK;
 
-  if (scp->sc_fpused)
-    /* Restore the FPU state.  Mach conveniently stores the state
-       in the format the i387 `frstor' instruction uses to restore it.  */
-    asm volatile ("frstor %0" : : "m" (scp->sc_fpsave));
+#ifdef i386_XFLOAT_STATE
+  if (scp->xstate)
+    {
+      if (scp->xstate->initialized)
+	{
+	  unsigned eax, ebx, ecx, edx;
+	  __cpuid_count(0xd, 0, eax, ebx, ecx, edx);
+	  switch (scp->xstate->fp_save_kind)
+	    {
+	    case 0: // FNSAVE
+	      asm volatile("frstor %0" : : "m" (scp->xstate->hw_state));
+	      break;
+	    case 1: // FXSAVE
+	      asm volatile("fxrstor %0" : : "m" (scp->xstate->hw_state),    \
+			   "a" (eax), "d" (edx));
+	      break;
+	    default: // XSAVE, XSAVEOPT, XSAVEC, XSAVES
+	      asm volatile("xrstor %0" : : "m" (scp->xstate->hw_state),     \
+			   "a" (eax), "d" (edx));
+	      break;
+	    }
+	}
+    }
+  else
+#endif
+    if (scp->sc_fpused)
+      /* Restore the FPU state.  Mach conveniently stores the state
+         in the format the i387 `frstor' instruction uses to restore it.  */
+      asm volatile ("frstor %0" : : "m" (scp->sc_fpsave));
 
   /* Copy the registers onto the user's stack, to be able to release the
      altstack (by unlocking sigstate).  Note that unless an altstack is used,
diff --git a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
index dfc554a..f425a4b 100644
--- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
+++ b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
@@ -379,6 +379,8 @@ struct file_handle
 						identity and may not
 						be usable to
 						open_by_handle_at.  */
+# define AT_HANDLE_MNT_ID_UNIQUE 1 /* Return the 64-bit unique mount
+				      ID.  */
 #endif
 
 __BEGIN_DECLS
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index 9d31685..5723ec1 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -142,7 +142,6 @@ CFLAGS-tst-avxmod.c += $(AVX-CFLAGS)
 AVX512-CFLAGS = -mavx512f
 CFLAGS-tst-audit10-aux.c += $(AVX512-CFLAGS)
 CFLAGS-tst-auditmod10a.c += $(AVX512-CFLAGS)
-CFLAGS-tst-auditmod10b.c += $(AVX512-CFLAGS)
 CFLAGS-tst-avx512-aux.c += $(AVX512-CFLAGS)
 CFLAGS-tst-avx512mod.c += $(AVX512-CFLAGS)
 
diff --git a/sysdeps/x86_64/tst-auditmod10b.c b/sysdeps/x86_64/tst-auditmod10b.c
index 6eb21b6..0b994ef 100644
--- a/sysdeps/x86_64/tst-auditmod10b.c
+++ b/sysdeps/x86_64/tst-auditmod10b.c
@@ -125,7 +125,6 @@ la_symbind64 (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
 
 #include <tst-audit.h>
 
-#ifdef __AVX512F__
 #include <immintrin.h>
 #include <cpuid.h>
 
@@ -148,9 +147,37 @@ check_avx512 (void)
   return (eax & 0xe6) == 0xe6;
 }
 
-#else
-#include <emmintrin.h>
-#endif
+void
+__attribute__ ((target ("avx512f")))
+pltenter_avx512f (La_regs *regs, long int *framesizep)
+{
+  __m512i zero = _mm512_setzero_si512 ();
+  if (memcmp (&regs->lr_vector[0], &zero, sizeof (zero))
+      || memcmp (&regs->lr_vector[1], &zero, sizeof (zero))
+      || memcmp (&regs->lr_vector[2], &zero, sizeof (zero))
+      || memcmp (&regs->lr_vector[3], &zero, sizeof (zero))
+      || memcmp (&regs->lr_vector[4], &zero, sizeof (zero))
+      || memcmp (&regs->lr_vector[5], &zero, sizeof (zero))
+      || memcmp (&regs->lr_vector[6], &zero, sizeof (zero))
+      || memcmp (&regs->lr_vector[7], &zero, sizeof (zero)))
+    abort ();
+
+  for (int i = 0; i < 8; i++)
+    regs->lr_vector[i].zmm[0]
+      = (La_x86_64_zmm) _mm512_set1_epi64 (i + 1);
+
+  __m512i zmm = _mm512_set1_epi64 (-1);
+  asm volatile ("vmovdqa64 %0, %%zmm0" : : "x" (zmm) : "xmm0" );
+  asm volatile ("vmovdqa64 %0, %%zmm1" : : "x" (zmm) : "xmm1" );
+  asm volatile ("vmovdqa64 %0, %%zmm2" : : "x" (zmm) : "xmm2" );
+  asm volatile ("vmovdqa64 %0, %%zmm3" : : "x" (zmm) : "xmm3" );
+  asm volatile ("vmovdqa64 %0, %%zmm4" : : "x" (zmm) : "xmm4" );
+  asm volatile ("vmovdqa64 %0, %%zmm5" : : "x" (zmm) : "xmm5" );
+  asm volatile ("vmovdqa64 %0, %%zmm6" : : "x" (zmm) : "xmm6" );
+  asm volatile ("vmovdqa64 %0, %%zmm7" : : "x" (zmm) : "xmm7" );
+
+  *framesizep = 1024;
+}
 
 ElfW(Addr)
 pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
@@ -160,39 +187,33 @@ pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
   printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
 	  symname, (long int) sym->st_value, ndx, *flags);
 
-#ifdef __AVX512F__
   if (check_avx512 () && strcmp (symname, "audit_test") == 0)
+    pltenter_avx512f (regs, framesizep);
+
+  return sym->st_value;
+}
+
+void
+__attribute__ ((target ("avx512f")))
+pltexit_avx512f (const La_regs *inregs, La_retval *outregs)
+{
+  __m512i zero = _mm512_setzero_si512 ();
+  if (memcmp (&outregs->lrv_vector0, &zero, sizeof (zero)))
+    abort ();
+
+  for (int i = 0; i < 8; i++)
     {
-      __m512i zero = _mm512_setzero_si512 ();
-      if (memcmp (&regs->lr_vector[0], &zero, sizeof (zero))
-	  || memcmp (&regs->lr_vector[1], &zero, sizeof (zero))
-	  || memcmp (&regs->lr_vector[2], &zero, sizeof (zero))
-	  || memcmp (&regs->lr_vector[3], &zero, sizeof (zero))
-	  || memcmp (&regs->lr_vector[4], &zero, sizeof (zero))
-	  || memcmp (&regs->lr_vector[5], &zero, sizeof (zero))
-	  || memcmp (&regs->lr_vector[6], &zero, sizeof (zero))
-	  || memcmp (&regs->lr_vector[7], &zero, sizeof (zero)))
-	abort ();
-
-      for (int i = 0; i < 8; i++)
-	regs->lr_vector[i].zmm[0]
-	  = (La_x86_64_zmm) _mm512_set1_epi64 (i + 1);
-
-      __m512i zmm = _mm512_set1_epi64 (-1);
-      asm volatile ("vmovdqa64 %0, %%zmm0" : : "x" (zmm) : "xmm0" );
-      asm volatile ("vmovdqa64 %0, %%zmm1" : : "x" (zmm) : "xmm1" );
-      asm volatile ("vmovdqa64 %0, %%zmm2" : : "x" (zmm) : "xmm2" );
-      asm volatile ("vmovdqa64 %0, %%zmm3" : : "x" (zmm) : "xmm3" );
-      asm volatile ("vmovdqa64 %0, %%zmm4" : : "x" (zmm) : "xmm4" );
-      asm volatile ("vmovdqa64 %0, %%zmm5" : : "x" (zmm) : "xmm5" );
-      asm volatile ("vmovdqa64 %0, %%zmm6" : : "x" (zmm) : "xmm6" );
-      asm volatile ("vmovdqa64 %0, %%zmm7" : : "x" (zmm) : "xmm7" );
-
-      *framesizep = 1024;
+      __m512i zmm = _mm512_set1_epi64 (i + 1);
+      if (memcmp (&inregs->lr_vector[i], &zmm, sizeof (zmm)) != 0)
+        abort ();
     }
-#endif
 
-  return sym->st_value;
+  outregs->lrv_vector0.zmm[0]
+    = (La_x86_64_zmm) _mm512_set1_epi64 (0x12349876);
+
+  __m512i zmm = _mm512_set1_epi64 (-1);
+  asm volatile ("vmovdqa64 %0, %%zmm0" : : "x" (zmm) : "xmm0" );
+  asm volatile ("vmovdqa64 %0, %%zmm1" : : "x" (zmm) : "xmm1" );
 }
 
 unsigned int
@@ -204,28 +225,8 @@ pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
 	  symname, (long int) sym->st_value, ndx,
 	  (ptrdiff_t) outregs->int_retval);
 
-#ifdef __AVX512F__
   if (check_avx512 () && strcmp (symname, "audit_test") == 0)
-    {
-      __m512i zero = _mm512_setzero_si512 ();
-      if (memcmp (&outregs->lrv_vector0, &zero, sizeof (zero)))
-	abort ();
-
-      for (int i = 0; i < 8; i++)
-	{
-	  __m512i zmm = _mm512_set1_epi64 (i + 1);
-	  if (memcmp (&inregs->lr_vector[i], &zmm, sizeof (zmm)) != 0)
-	    abort ();
-	}
-
-      outregs->lrv_vector0.zmm[0]
-	= (La_x86_64_zmm) _mm512_set1_epi64 (0x12349876);
-
-      __m512i zmm = _mm512_set1_epi64 (-1);
-      asm volatile ("vmovdqa64 %0, %%zmm0" : : "x" (zmm) : "xmm0" );
-      asm volatile ("vmovdqa64 %0, %%zmm1" : : "x" (zmm) : "xmm1" );
-    }
-#endif
+    pltexit_avx512f (inregs, outregs);
 
   return 0;
 }