diff --git a/gdb/aarch64-linux-nat.c b/gdb/aarch64-linux-nat.c
index 673817e..d7ac19e 100644
--- a/gdb/aarch64-linux-nat.c
+++ b/gdb/aarch64-linux-nat.c
@@ -543,6 +543,34 @@ aarch64_linux_read_description (struct target_ops *ops)
   return tdesc_aarch64;
 }
 
+/* Convert a native/host siginfo object, into/from the siginfo in the
+   layout of the inferiors' architecture.  Returns true if any
+   conversion was done; false otherwise.  If DIRECTION is 1, then copy
+   from INF to NATIVE.  If DIRECTION is 0, copy from NATIVE to
+   INF.  */
+
+static int
+aarch64_linux_siginfo_fixup (siginfo_t *native, gdb_byte *inf, int direction)
+{
+  struct gdbarch *gdbarch = get_frame_arch (get_current_frame ());
+
+  /* Is the inferior 32-bit?  If so, then do fixup the siginfo
+     object.  */
+  if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
+    {
+      if (direction == 0)
+	aarch64_compat_siginfo_from_siginfo ((struct compat_siginfo *) inf,
+					     native);
+      else
+	aarch64_siginfo_from_compat_siginfo (native,
+					     (struct compat_siginfo *) inf);
+
+      return 1;
+    }
+
+  return 0;
+}
+
 /* Returns the number of hardware watchpoints of type TYPE that we can
    set.  Value is positive if we can set CNT watchpoints, zero if
    setting watchpoints of type TYPE is not supported, and negative if
@@ -850,4 +878,7 @@ _initialize_aarch64_linux_nat (void)
   linux_nat_set_new_fork (t, aarch64_linux_new_fork);
   linux_nat_set_forget_process (t, aarch64_forget_process);
   linux_nat_set_prepare_to_resume (t, aarch64_linux_prepare_to_resume);
+
+  /* Add our siginfo layout converter.  */
+  linux_nat_set_siginfo_fixup (t, aarch64_linux_siginfo_fixup);
 }
diff --git a/gdb/gdbserver/linux-aarch64-low.c b/gdb/gdbserver/linux-aarch64-low.c
index aebf1e3..73b248c 100644
--- a/gdb/gdbserver/linux-aarch64-low.c
+++ b/gdb/gdbserver/linux-aarch64-low.c
@@ -430,6 +430,27 @@ ps_get_thread_area (const struct ps_prochandle *ph,
   return PS_OK;
 }
 
+/* Implementation of linux_target_ops method "siginfo_fixup".  */
+
+static int
+aarch64_linux_siginfo_fixup (siginfo_t *native, void *inf, int direction)
+{
+  /* Is the inferior 32-bit?  If so, then fixup the siginfo object.  */
+  if (!is_64bit_tdesc ())
+    {
+      if (direction == 0)
+	aarch64_compat_siginfo_from_siginfo ((struct compat_siginfo *) inf,
+					     native);
+      else
+	aarch64_siginfo_from_compat_siginfo (native,
+					     (struct compat_siginfo *) inf);
+
+      return 1;
+    }
+
+  return 0;
+}
+
 /* Implementation of linux_target_ops method "linux_new_process".  */
 
 static struct arch_process_info *
@@ -581,7 +602,7 @@ struct linux_target_ops the_low_target =
   aarch64_stopped_data_address,
   NULL, /* collect_ptrace_register */
   NULL, /* supply_ptrace_register */
-  NULL, /* siginfo_fixup */
+  aarch64_linux_siginfo_fixup,
   aarch64_linux_new_process,
   aarch64_linux_new_thread,
   aarch64_linux_new_fork,
diff --git a/gdb/nat/aarch64-linux.c b/gdb/nat/aarch64-linux.c
index ba94b00..0634094 100644
--- a/gdb/nat/aarch64-linux.c
+++ b/gdb/nat/aarch64-linux.c
@@ -78,3 +78,120 @@ aarch64_linux_new_thread (struct lwp_info *lwp)
 
   lwp_set_arch_private_info (lwp, info);
 }
+
+/* Convert native siginfo FROM to the siginfo in the layout of the
+   inferior's architecture TO.  */
+
+void
+aarch64_compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from)
+{
+  memset (to, 0, sizeof (*to));
+
+  to->si_signo = from->si_signo;
+  to->si_errno = from->si_errno;
+  to->si_code = from->si_code;
+
+  if (to->si_code == SI_TIMER)
+    {
+      to->cpt_si_timerid = from->si_timerid;
+      to->cpt_si_overrun = from->si_overrun;
+      to->cpt_si_ptr = (intptr_t) from->si_ptr;
+    }
+  else if (to->si_code == SI_USER)
+    {
+      to->cpt_si_pid = from->si_pid;
+      to->cpt_si_uid = from->si_uid;
+    }
+  else if (to->si_code < 0)
+    {
+      to->cpt_si_pid = from->si_pid;
+      to->cpt_si_uid = from->si_uid;
+      to->cpt_si_ptr = (intptr_t) from->si_ptr;
+    }
+  else
+    {
+      switch (to->si_signo)
+	{
+	case SIGCHLD:
+	  to->cpt_si_pid = from->si_pid;
+	  to->cpt_si_uid = from->si_uid;
+	  to->cpt_si_status = from->si_status;
+	  to->cpt_si_utime = from->si_utime;
+	  to->cpt_si_stime = from->si_stime;
+	  break;
+	case SIGILL:
+	case SIGFPE:
+	case SIGSEGV:
+	case SIGBUS:
+	  to->cpt_si_addr = (intptr_t) from->si_addr;
+	  break;
+	case SIGPOLL:
+	  to->cpt_si_band = from->si_band;
+	  to->cpt_si_fd = from->si_fd;
+	  break;
+	default:
+	  to->cpt_si_pid = from->si_pid;
+	  to->cpt_si_uid = from->si_uid;
+	  to->cpt_si_ptr = (intptr_t) from->si_ptr;
+	  break;
+	}
+    }
+}
+
+/* Convert inferior's architecture siginfo FROM to native siginfo TO.  */
+
+void
+aarch64_siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from)
+{
+  memset (to, 0, sizeof (*to));
+
+  to->si_signo = from->si_signo;
+  to->si_errno = from->si_errno;
+  to->si_code = from->si_code;
+
+  if (to->si_code == SI_TIMER)
+    {
+      to->si_timerid = from->cpt_si_timerid;
+      to->si_overrun = from->cpt_si_overrun;
+      to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr;
+    }
+  else if (to->si_code == SI_USER)
+    {
+      to->si_pid = from->cpt_si_pid;
+      to->si_uid = from->cpt_si_uid;
+    }
+  if (to->si_code < 0)
+    {
+      to->si_pid = from->cpt_si_pid;
+      to->si_uid = from->cpt_si_uid;
+      to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr;
+    }
+  else
+    {
+      switch (to->si_signo)
+	{
+	case SIGCHLD:
+	  to->si_pid = from->cpt_si_pid;
+	  to->si_uid = from->cpt_si_uid;
+	  to->si_status = from->cpt_si_status;
+	  to->si_utime = from->cpt_si_utime;
+	  to->si_stime = from->cpt_si_stime;
+	  break;
+	case SIGILL:
+	case SIGFPE:
+	case SIGSEGV:
+	case SIGBUS:
+	  to->si_addr = (void *) (intptr_t) from->cpt_si_addr;
+	  break;
+	case SIGPOLL:
+	  to->si_band = from->cpt_si_band;
+	  to->si_fd = from->cpt_si_fd;
+	  break;
+	default:
+	  to->si_pid = from->cpt_si_pid;
+	  to->si_uid = from->cpt_si_uid;
+	  to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr;
+	  break;
+	}
+    }
+}
diff --git a/gdb/nat/aarch64-linux.h b/gdb/nat/aarch64-linux.h
index 5cb432c..89eb4e3 100644
--- a/gdb/nat/aarch64-linux.h
+++ b/gdb/nat/aarch64-linux.h
@@ -19,6 +19,102 @@
 #ifndef AARCH64_LINUX_H
 #define AARCH64_LINUX_H 1
 
+#include <signal.h>
+
+typedef int compat_int_t;
+typedef unsigned int compat_uptr_t;
+
+typedef int compat_time_t;
+typedef int compat_timer_t;
+typedef int compat_clock_t;
+
+struct compat_timeval
+{
+  compat_time_t tv_sec;
+  int tv_usec;
+};
+
+typedef union compat_sigval
+{
+  compat_int_t sival_int;
+  compat_uptr_t sival_ptr;
+} compat_sigval_t;
+
+typedef struct compat_siginfo
+{
+  int si_signo;
+  int si_errno;
+  int si_code;
+
+  union
+  {
+    int _pad[((128 / sizeof (int)) - 3)];
+
+    /* kill() */
+    struct
+    {
+      unsigned int _pid;
+      unsigned int _uid;
+    } _kill;
+
+    /* POSIX.1b timers */
+    struct
+    {
+      compat_timer_t _tid;
+      int _overrun;
+      compat_sigval_t _sigval;
+    } _timer;
+
+    /* POSIX.1b signals */
+    struct
+    {
+      unsigned int _pid;
+      unsigned int _uid;
+      compat_sigval_t _sigval;
+    } _rt;
+
+    /* SIGCHLD */
+    struct
+    {
+      unsigned int _pid;
+      unsigned int _uid;
+      int _status;
+      compat_clock_t _utime;
+      compat_clock_t _stime;
+    } _sigchld;
+
+    /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
+    struct
+    {
+      unsigned int _addr;
+    } _sigfault;
+
+    /* SIGPOLL */
+    struct
+    {
+      int _band;
+      int _fd;
+    } _sigpoll;
+  } _sifields;
+} compat_siginfo_t;
+
+#define cpt_si_pid _sifields._kill._pid
+#define cpt_si_uid _sifields._kill._uid
+#define cpt_si_timerid _sifields._timer._tid
+#define cpt_si_overrun _sifields._timer._overrun
+#define cpt_si_status _sifields._sigchld._status
+#define cpt_si_utime _sifields._sigchld._utime
+#define cpt_si_stime _sifields._sigchld._stime
+#define cpt_si_ptr _sifields._rt._sigval.sival_ptr
+#define cpt_si_addr _sifields._sigfault._addr
+#define cpt_si_band _sifields._sigpoll._band
+#define cpt_si_fd _sifields._sigpoll._fd
+
+void aarch64_siginfo_from_compat_siginfo (siginfo_t *to,
+					    compat_siginfo_t *from);
+void aarch64_compat_siginfo_from_siginfo (compat_siginfo_t *to,
+					    siginfo_t *from);
+
 void aarch64_linux_prepare_to_resume (struct lwp_info *lwp);
 
 void aarch64_linux_new_thread (struct lwp_info *lwp);
