port GDB to ia64-hpux (native).

ChangeLog:

        * configure.ac: Remove readline, mmalloc, and gdb from noconfigdirs
        for ia64-hpux.
        * configure: Regenerate.

gdb/ChangeLog:

        * config/ia64/hpux.mh, ia64-hpux-nat.c, ia64-hpux-tdep.c,
        ia64-hpux-tdep.h, solib-ia64-hpux.c, solib-ia64-hpux.h: New files.

        * configure.host: Add handling for ia64-hpux hosts.  Add associated
        floatformats.
        * configure.tgt: Add handling for ia64-hpux targets.
        * Makefile.in (ALL_64_TARGET_OBS): Add ia64-hpux-tdep.o.
        (HFILES_NO_SRCDIR): Add ia64-hpux-tdep.h.
        (ALLDEPFILES): Add ia64-hpux-nat.c ia64-hpux-tdep.c.

13 files changed, 1531 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index 5a48a710a8a..668a60c0817 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-01-13  Joel Brobecker  <brobecker@adacore.com>
+
+	* configure.ac: Remove readline, mmalloc, and gdb from noconfigdirs
+	for ia64-hpux.
+	* configure: Regenerate.
+
 2011-01-02  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	Sync from GCC:
diff --git a/configure b/configure
index 66ca5d3f65b..5e469f4b865 100755
--- a/configure
+++ b/configure
@@ -3353,8 +3353,8 @@ case "${target}" in
     noconfigdirs="$noconfigdirs readline mmalloc libgui itcl gdb"
     ;;
   ia64*-**-hpux*)
-    # No gdb or ld support yet.
-    noconfigdirs="$noconfigdirs ${libgcj} readline mmalloc libgui itcl gdb ld"
+    # No ld support yet.
+    noconfigdirs="$noconfigdirs ${libgcj} libgui itcl ld"
     ;;
   ia64*-*-*vms*)
     # No gdb or ld support yet.
diff --git a/configure.ac b/configure.ac
index 4807ffb9d0a..c7a86e2b6db 100644
--- a/configure.ac
+++ b/configure.ac
@@ -804,8 +804,8 @@ case "${target}" in
     noconfigdirs="$noconfigdirs readline mmalloc libgui itcl gdb"
     ;;
   ia64*-**-hpux*)
-    # No gdb or ld support yet.
-    noconfigdirs="$noconfigdirs ${libgcj} readline mmalloc libgui itcl gdb ld"
+    # No ld support yet.
+    noconfigdirs="$noconfigdirs ${libgcj} libgui itcl ld"
     ;;
   ia64*-*-*vms*)
     # No gdb or ld support yet.
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e8acfd8ce3d..814b0dc4426 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,18 @@
 2011-01-13  Joel Brobecker  <brobecker@adacore.com>
 
+	Add support for ia64-hpux.
+	* config/ia64/hpux.mh, ia64-hpux-nat.c, ia64-hpux-tdep.c,
+	ia64-hpux-tdep.h, solib-ia64-hpux.c, solib-ia64-hpux.h: New files.
+
+	* configure.host: Add handling for ia64-hpux hosts.  Add associated
+	floatformats.
+	* configure.tgt: Add handling for ia64-hpux targets.
+	* Makefile.in (ALL_64_TARGET_OBS): Add ia64-hpux-tdep.o.
+	(HFILES_NO_SRCDIR): Add ia64-hpux-tdep.h.
+	(ALLDEPFILES): Add ia64-hpux-nat.c ia64-hpux-tdep.c.
+
+2011-01-13  Joel Brobecker  <brobecker@adacore.com>
+
 	[ttrace] Compute thread list immediately after attach.
 	* inf_ttrace_attach (inf_ttrace_create_threads_after_attach):
 	New subprogram.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 9459de44f0b..fc03b0cb932 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -497,7 +497,7 @@ ALL_64_TARGET_OBS = \
 	amd64fbsd-tdep.o amd64-darwin-tdep.o amd64-dicos-tdep.o \
 	amd64-linux-tdep.o amd64nbsd-tdep.o \
 	amd64obsd-tdep.o amd64-sol2-tdep.o amd64-tdep.o amd64-windows-tdep.o \
-	ia64-linux-tdep.o ia64-tdep.o \
+	ia64-hpux-tdep.o ia64-linux-tdep.o ia64-tdep.o \
 	mips64obsd-tdep.o \
 	sparc64fbsd-tdep.o sparc64-linux-tdep.o sparc64nbsd-tdep.o \
 	sparc64obsd-tdep.o sparc64-sol2-tdep.o sparc64-tdep.o
@@ -783,7 +783,7 @@ annotate.h sim-regno.h dictionary.h dfp.h main.h frame-unwind.h	\
 remote-fileio.h i386-linux-tdep.h vax-tdep.h objc-lang.h \
 sentinel-frame.h bcache.h symfile.h windows-tdep.h linux-tdep.h \
 gdb_usleep.h jit.h xml-syscall.h ada-operator.inc microblaze-tdep.h \
-psymtab.h psympriv.h progspace.h bfin-tdep.h
+psymtab.h psympriv.h progspace.h bfin-tdep.h ia64-hpux-tdep.h
 
 # Header files that already have srcdir in them, or which are in objdir.
 
@@ -1445,6 +1445,7 @@ ALLDEPFILES = \
 	i386-linux-tdep.c i386-nat.c \
 	i386-sol2-nat.c i386-sol2-tdep.c \
 	i386gnu-nat.c i386gnu-tdep.c \
+	ia64-hpux-nat.c ia64-hpux-tdep.c \
 	ia64-linux-nat.c ia64-linux-tdep.c ia64-tdep.c \
 	inf-ptrace.c inf-ttrace.c \
 	irix5-nat.c \
diff --git a/gdb/config/ia64/hpux.mh b/gdb/config/ia64/hpux.mh
new file mode 100644
index 00000000000..b75763bcdbb
--- /dev/null
+++ b/gdb/config/ia64/hpux.mh
@@ -0,0 +1,3 @@
+# Host: ia64 running HP-UX
+NATDEPFILES= fork-child.o inf-ttrace.o corelow.o ia64-hpux-nat.o \
+        solib-ia64-hpux.o
diff --git a/gdb/configure.host b/gdb/configure.host
index 794eeee573b..bcebdafdc61 100644
--- a/gdb/configure.host
+++ b/gdb/configure.host
@@ -105,6 +105,7 @@ i[34567]86-*-solaris2.1[0-9]* | x86_64-*-solaris2.1[0-9]*)
 i[34567]86-*-solaris*)	gdb_host=i386sol2 ;;
 i[34567]86-*-cygwin*)	gdb_host=cygwin ;;
 
+ia64-*-hpux*)		gdb_host=hpux ;;
 ia64-*-linux*)		gdb_host=linux ;;
 
 m68*-*-linux*)		gdb_host=linux ;;
@@ -202,6 +203,11 @@ m68*-*-*)
 	gdb_host_double_format="&floatformat_ieee_double_big"
 	gdb_host_long_double_format="&floatformat_m68881_ext"
 	;;
+ia64-*-hpux*)
+	gdb_host_float_format="&floatformat_ieee_single_big"
+	gdb_host_double_format="&floatformat_ieee_double_big"
+	gdb_host_long_double_format="&floatformat_ia64_quad_big"
+	;;
 *)
 	gdb_host_float_format=0
 	gdb_host_double_format=0
diff --git a/gdb/configure.tgt b/gdb/configure.tgt
index f2937d8fd67..fd0570b8269 100644
--- a/gdb/configure.tgt
+++ b/gdb/configure.tgt
@@ -244,6 +244,10 @@ i[34567]86-*-*)
 	gdb_target_obs="i386-tdep.o i387-tdep.o"
 	;;
 
+ia64-*-hpux*)
+	# Target: Intel IA-64 running HP-UX
+	gdb_target_obs="ia64-tdep.o ia64-hpux-tdep.o"
+	;;
 ia64-*-linux*)
 	# Target: Intel IA-64 running GNU/Linux
 	gdb_target_obs="ia64-tdep.o ia64-linux-tdep.o linux-tdep.o \
diff --git a/gdb/ia64-hpux-nat.c b/gdb/ia64-hpux-nat.c
new file mode 100644
index 00000000000..ca1c278e3ac
--- /dev/null
+++ b/gdb/ia64-hpux-nat.c
@@ -0,0 +1,642 @@
+/* Copyright (C) 2010 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "ia64-tdep.h"
+#include "inferior.h"
+#include "inf-ttrace.h"
+#include "regcache.h"
+#include "solib-ia64-hpux.h"
+
+#include <ia64/sys/uregs.h>
+#include <sys/ttrace.h>
+
+/* The offsets used with ttrace to read the value of the raw registers.  */
+
+static int u_offsets[] =
+{ /* Static General Registers.  */
+  -1,     __r1,   __r2,   __r3,   __r4,   __r5,   __r6,   __r7,
+  __r8,   __r9,   __r10,  __r11,  __r12,  __r13,  __r14,  __r15,
+  __r16,  __r17,  __r18,  __r19,  __r20,  __r21,  __r22,  __r23,
+  __r24,  __r25,  __r26,  __r27,  __r28,  __r29,  __r30,  __r31,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+
+  /* Static Floating-Point Registers.  */
+    -1,     -1,   __f2,   __f3,   __f4,   __f5,   __f6,   __f7,
+  __f8,   __f9,   __f10,  __f11,  __f12,  __f13,  __f14,  __f15,
+  __f16,  __f17,  __f18,  __f19,  __f20,  __f21,  __f22,  __f23,
+  __f24,  __f25,  __f26,  __f27,  __f28,  __f29,  __f30,  __f31,
+  __f32,  __f33,  __f34,  __f35,  __f36,  __f37,  __f38,  __f39,
+  __f40,  __f41,  __f42,  __f43,  __f44,  __f45,  __f46,  __f47,
+  __f48,  __f49,  __f50,  __f51,  __f52,  __f53,  __f54,  __f55,
+  __f56,  __f57,  __f58,  __f59,  __f60,  __f61,  __f62,  __f63,
+  __f64,  __f65,  __f66,  __f67,  __f68,  __f69,  __f70,  __f71,
+  __f72,  __f73,  __f74,  __f75,  __f76,  __f77,  __f78,  __f79,
+  __f80,  __f81,  __f82,  __f83,  __f84,  __f85,  __f86,  __f87,
+  __f88,  __f89,  __f90,  __f91,  __f92,  __f93,  __f94,  __f95,
+  __f96,  __f97,  __f98,  __f99,  __f100, __f101, __f102, __f103,
+  __f104, __f105, __f106, __f107, __f108, __f109, __f110, __f111,
+  __f112, __f113, __f114, __f115, __f116, __f117, __f118, __f119,
+  __f120, __f121, __f122, __f123, __f124, __f125, __f126, __f127,
+
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+  -1,     -1,     -1,     -1,     -1,     -1,     -1,     -1,
+
+  /* Branch Registers.  */
+  __b0,   __b1,   __b2,   __b3,   __b4,   __b5,   __b6,   __b7,
+
+  /* Virtual frame pointer and virtual return address pointer.  */
+  -1, -1,
+
+  /* Other registers.  */
+  __pr, __ip, __cr_ipsr, __cfm,
+
+  /* Kernel registers.  */
+  -1,   -1,   -1,   -1,
+  -1,   -1,   -1,   -1,
+
+  -1, -1, -1, -1, -1, -1, -1, -1,
+
+  /* Some application registers.  */
+  __ar_rsc, __ar_bsp, __ar_bspstore, __ar_rnat,
+
+  -1,
+  -1,  /* Not available: FCR, IA32 floating control register.  */
+  -1, -1,
+
+  -1,         /* Not available: EFLAG.  */
+  -1,         /* Not available: CSD.  */
+  -1,         /* Not available: SSD.  */
+  -1,         /* Not available: CFLG.  */
+  -1,         /* Not available: FSR.  */
+  -1,         /* Not available: FIR.  */
+  -1,         /* Not available: FDR.  */
+  -1,
+  __ar_ccv, -1, -1, -1, __ar_unat, -1, -1, -1,
+  __ar_fpsr, -1, -1, -1,
+  -1,         /* Not available: ITC.  */
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  __ar_pfs, __ar_lc, __ar_ec,
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  -1
+  /* All following registers, starting with nat0, are handled as
+     pseudo registers, and hence are handled separately.  */
+};
+
+/* Some register have a fixed value and can not be modified.
+   Store their value in static constant buffers that can be used
+   later to fill the register cache.  */
+static const char r0_value[8] = {0x00, 0x00, 0x00, 0x00,
+                                 0x00, 0x00, 0x00, 0x00};
+static const char f0_value[16] = {0x00, 0x00, 0x00, 0x00,
+                                  0x00, 0x00, 0x00, 0x00,
+                                  0x00, 0x00, 0x00, 0x00,
+                                  0x00, 0x00, 0x00, 0x00};
+static const char f1_value[16] = {0x00, 0x00, 0x00, 0x00,
+                                  0x00, 0x00, 0xff, 0xff,
+                                  0x80, 0x00, 0x00, 0x00,
+                                  0x00, 0x00, 0x00, 0x00};
+
+/* The "to_wait" routine from the "inf-ttrace" layer.  */
+
+static ptid_t (*super_to_wait) (struct target_ops *, ptid_t,
+				struct target_waitstatus *, int);
+
+/* The "to_wait" target_ops routine routine for ia64-hpux.  */
+
+static ptid_t
+ia64_hpux_wait (struct target_ops *ops, ptid_t ptid,
+		struct target_waitstatus *ourstatus, int options)
+{
+  ptid_t new_ptid;
+
+  new_ptid = super_to_wait (ops, ptid, ourstatus, options);
+
+  /* If this is a DLD event (hard-coded breakpoint instruction
+     that was activated by the solib-ia64-hpux module), we need to
+     process it, and then resume the execution as if the event did
+     not happen.  */
+  if (ourstatus->kind == TARGET_WAITKIND_STOPPED
+      && ourstatus->value.sig == TARGET_SIGNAL_TRAP
+      && ia64_hpux_at_dld_breakpoint_p (new_ptid))
+    {
+      ia64_hpux_handle_dld_breakpoint (new_ptid);
+
+      target_resume (new_ptid, 0, TARGET_SIGNAL_0);
+      ourstatus->kind = TARGET_WAITKIND_IGNORE;
+    }
+
+  return new_ptid;
+}
+
+/* Fetch the RNAT register and supply it to the REGCACHE.  */
+
+static void
+ia64_hpux_fetch_rnat_register (struct regcache *regcache)
+{
+  CORE_ADDR addr;
+  gdb_byte buf[8];
+  int status;
+
+  /* The value of RNAT is stored at bsp|0x1f8, and must be read using
+     TT_LWP_RDRSEBS.  */
+
+  regcache_raw_read_unsigned (regcache, IA64_BSP_REGNUM, &addr);
+  addr |= 0x1f8;
+
+  status = ttrace (TT_LWP_RDRSEBS, ptid_get_pid (inferior_ptid),
+		   ptid_get_lwp (inferior_ptid), addr, sizeof (buf),
+		   (uintptr_t) buf);
+  if (status < 0)
+    error (_("failed to read RNAT register at %s"),
+	   paddress (get_regcache_arch(regcache), addr));
+
+  regcache_raw_supply (regcache, IA64_RNAT_REGNUM, buf);
+}
+
+/* Read the value of the register saved at OFFSET in the save_state_t
+   structure, and store its value in BUF.  LEN is the size of the register
+   to be read.  */
+
+static int
+ia64_hpux_read_register_from_save_state_t (int offset, gdb_byte *buf, int len)
+{
+  int status;
+
+ status = ttrace (TT_LWP_RUREGS, ptid_get_pid (inferior_ptid),
+		  ptid_get_lwp (inferior_ptid), offset, len, (uintptr_t) buf);
+
+  return status;
+}
+
+/* Fetch register REGNUM from the inferior.  */
+
+static void
+ia64_hpux_fetch_register (struct regcache *regcache, int regnum)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  int offset, len, status;
+  gdb_byte *buf;
+
+  if (regnum == IA64_GR0_REGNUM)
+    {
+      /* r0 is always 0.  */
+      regcache_raw_supply (regcache, regnum, r0_value);
+      return;
+    }
+
+  if (regnum == IA64_FR0_REGNUM)
+    {
+      /* f0 is always 0.0.  */
+      regcache_raw_supply (regcache, regnum, f0_value);
+      return;
+    }
+
+  if (regnum == IA64_FR1_REGNUM)
+    {
+      /* f1 is always 1.0.  */
+      regcache_raw_supply (regcache, regnum, f1_value);
+      return;
+    }
+
+  if (regnum == IA64_RNAT_REGNUM)
+    {
+      ia64_hpux_fetch_rnat_register (regcache);
+      return;
+    }
+
+  /* Get the register location. If the register can not be fetched,
+     then return now.  */
+  offset = u_offsets[regnum];
+  if (offset == -1)
+    return;
+
+  len = register_size (gdbarch, regnum);
+  buf = alloca (len * sizeof (gdb_byte));
+  status = ia64_hpux_read_register_from_save_state_t (offset, buf, len);
+  if (status < 0)
+    warning (_("Failed to read register value for %s.\n"),
+             gdbarch_register_name (gdbarch, regnum));
+
+  regcache_raw_supply (regcache, regnum, buf);
+}
+
+/* The "to_fetch_registers" target_ops routine for ia64-hpux.  */
+
+static void
+ia64_hpux_fetch_registers (struct target_ops *ops,
+			   struct regcache *regcache, int regnum)
+{
+  if (regnum == -1)
+    for (regnum = 0;
+	 regnum < gdbarch_num_regs (get_regcache_arch (regcache));
+	 regnum++)
+      ia64_hpux_fetch_register (regcache, regnum);
+  else
+    ia64_hpux_fetch_register (regcache, regnum);
+}
+
+/* Save register REGNUM (stored in BUF) in the save_state_t structure.
+   LEN is the size of the register in bytes.
+
+   Return the value from the corresponding ttrace call (a negative value
+   means that the operation failed).  */
+
+static int
+ia64_hpux_write_register_to_saved_state_t (int offset, gdb_byte *buf, int len)
+{
+  return ttrace (TT_LWP_WUREGS, ptid_get_pid (inferior_ptid),
+		 ptid_get_lwp (inferior_ptid), offset, len, (uintptr_t) buf);
+}
+
+/* Store register REGNUM into the inferior.  */
+
+static void
+ia64_hpux_store_register (const struct regcache *regcache, int regnum)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  int offset = u_offsets[regnum];
+  gdb_byte *buf;
+  int len, status;
+
+  /* If the register can not be stored, then return now.  */
+  if (offset == -1)
+    return;
+
+  /* I don't know how to store that register for now.  So just ignore any
+     request to store it, to avoid an internal error.  */
+  if (regnum == IA64_PSR_REGNUM)
+    return;
+
+  len = register_size (gdbarch, regnum);
+  buf = alloca (len * sizeof (gdb_byte));
+  regcache_raw_collect (regcache, regnum, buf);
+
+  status = ia64_hpux_write_register_to_saved_state_t (offset, buf, len);
+
+  if (status < 0)
+    error (_("failed to write register value for %s.\n"),
+           gdbarch_register_name (gdbarch, regnum));
+}
+
+/* The "to_store_registers" target_ops routine for ia64-hpux.  */
+
+static void
+ia64_hpux_store_registers (struct target_ops *ops,
+			   struct regcache *regcache, int regnum)
+{
+  if (regnum == -1)
+    for (regnum = 0;
+	 regnum < gdbarch_num_regs (get_regcache_arch (regcache));
+	 regnum++)
+      ia64_hpux_store_register (regcache, regnum);
+  else
+    ia64_hpux_store_register (regcache, regnum);
+}
+
+/* The "xfer_partial" routine from the "inf-ttrace" target layer.
+   Ideally, we would like to use this routine for all transfer
+   requests, but this platforms has a lot of special cases that
+   need to be handled manually.  So we override this routine and
+   delegate back if we detect that we are not in a special case.  */
+
+static LONGEST (*super_xfer_partial) (struct target_ops *, enum target_object,
+				      const char *, gdb_byte *,
+				      const gdb_byte *, ULONGEST, LONGEST);
+
+/* The "xfer_partial" routine for a memory region that is completely
+   outside of the backing-store region.  */
+
+static LONGEST
+ia64_hpux_xfer_memory_no_bs (struct target_ops *ops, const char *annex,
+			     gdb_byte *readbuf, const gdb_byte *writebuf,
+			     CORE_ADDR addr, LONGEST len)
+{
+  /* Memory writes need to be aligned on 16byte boundaries, at least
+     when writing in the text section.  On the other hand, the size
+     of the buffer does not need to be a multiple of 16bytes.
+
+     No such restriction when performing memory reads.  */
+
+  if (writebuf && addr & 0x0f)
+    {
+      const CORE_ADDR aligned_addr = addr & ~0x0f;
+      const int aligned_len = len + (addr - aligned_addr);
+      gdb_byte *aligned_buf = alloca (aligned_len * sizeof (gdb_byte));
+      LONGEST status;
+
+      /* Read the portion of memory between ALIGNED_ADDR and ADDR, so
+         that we can write it back during our aligned memory write.  */
+      status = super_xfer_partial (ops, TARGET_OBJECT_MEMORY, annex,
+				   aligned_buf /* read */,
+				   NULL /* write */,
+				   aligned_addr, addr - aligned_addr);
+      if (status <= 0)
+	return 0;
+      memcpy (aligned_buf + (addr - aligned_addr), writebuf, len);
+
+      return super_xfer_partial (ops, TARGET_OBJECT_MEMORY, annex,
+				 NULL /* read */, aligned_buf /* write */,
+				 aligned_addr, aligned_len);
+    }
+  else
+    /* Memory read or properly aligned memory write.  */
+    return super_xfer_partial (ops, TARGET_OBJECT_MEMORY, annex, readbuf,
+			       writebuf, addr, len);
+}
+
+/* Read LEN bytes at ADDR from memory, and store it in BUF.  This memory
+   region is assumed to be inside the backing store.
+
+   Return zero if the operation failed.  */
+
+static int
+ia64_hpux_read_memory_bs (gdb_byte *buf, CORE_ADDR addr, int len)
+{
+  gdb_byte tmp_buf[8];
+  CORE_ADDR tmp_addr = addr & ~0x7;
+
+  while (tmp_addr < addr + len)
+    {
+      int status;
+      int skip_lo = 0;
+      int skip_hi = 0;
+
+      status = ttrace (TT_LWP_RDRSEBS, ptid_get_pid (inferior_ptid),
+		       ptid_get_lwp (inferior_ptid), tmp_addr,
+		       sizeof (tmp_buf), (uintptr_t) tmp_buf);
+      if (status < 0)
+        return 0;
+
+      if (tmp_addr < addr)
+        skip_lo = addr - tmp_addr;
+
+      if (tmp_addr + sizeof (tmp_buf) > addr + len)
+        skip_hi = (tmp_addr + sizeof (tmp_buf)) - (addr + len);
+
+      memcpy (buf + (tmp_addr + skip_lo - addr),
+              tmp_buf + skip_lo,
+              sizeof (tmp_buf) - skip_lo - skip_hi);
+
+      tmp_addr += sizeof (tmp_buf);
+    }
+
+  return 1;
+}
+
+/* Write LEN bytes from BUF in memory at ADDR.  This memory region is assumed
+   to be inside the backing store.
+
+   Return zero if the operation failed.  */
+
+static int
+ia64_hpux_write_memory_bs (const gdb_byte *buf, CORE_ADDR addr, int len)
+{
+  gdb_byte tmp_buf[8];
+  CORE_ADDR tmp_addr = addr & ~0x7;
+
+  while (tmp_addr < addr + len)
+    {
+      int status;
+      int lo = 0;
+      int hi = 7;
+
+      if (tmp_addr < addr || tmp_addr + sizeof (tmp_buf) > addr + len)
+	/* Part of the 8byte region pointed by tmp_addr needs to be preserved.
+	   So read it in before we copy the data that needs to be changed.  */
+	if (!ia64_hpux_read_memory_bs (tmp_buf, tmp_addr, sizeof (tmp_buf)))
+	  return 0;
+
+      if (tmp_addr < addr)
+        lo = addr - tmp_addr;
+
+      if (tmp_addr + sizeof (tmp_buf) > addr + len)
+        hi = addr - tmp_addr + len - 1;
+
+      memcpy (tmp_buf + lo, buf + tmp_addr - addr  + lo, hi - lo + 1);
+
+      status = ttrace (TT_LWP_WRRSEBS, ptid_get_pid (inferior_ptid),
+		       ptid_get_lwp (inferior_ptid), tmp_addr,
+		       sizeof (tmp_buf), (uintptr_t) tmp_buf);
+      if (status < 0)
+        return 0;
+
+      tmp_addr += sizeof (tmp_buf);
+    }
+
+  return 1;
+}
+
+/* The "xfer_partial" routine for a memory region that is completely
+   inside of the backing-store region.  */
+
+static LONGEST
+ia64_hpux_xfer_memory_bs (struct target_ops *ops, const char *annex,
+			  gdb_byte *readbuf, const gdb_byte *writebuf,
+			  CORE_ADDR addr, LONGEST len)
+{
+  int success;
+
+  if (readbuf)
+    success = ia64_hpux_read_memory_bs (readbuf, addr, len);
+  else
+    success = ia64_hpux_write_memory_bs (writebuf, addr, len);
+
+  if (success)
+    return len;
+  else
+    return 0;
+}
+
+/* The "xfer_partial" target_ops routine for ia64-hpux, in the case
+   where the requested object is TARGET_OBJECT_MEMORY.  */
+
+static LONGEST
+ia64_hpux_xfer_memory (struct target_ops *ops, const char *annex,
+		       gdb_byte *readbuf, const gdb_byte *writebuf,
+		       CORE_ADDR addr, LONGEST len)
+{
+  CORE_ADDR bsp, bspstore;
+  CORE_ADDR start_addr, short_len;
+  int status = 0;
+
+  /* The back-store region cannot be read/written by the standard memory
+     read/write operations.  So we handle the memory region piecemeal:
+       (1) and (2) The regions before and after the backing-store region,
+           which can be treated as normal memory;
+       (3) The region inside the backing-store, which needs to be
+           read/written specially.  */
+
+  regcache_raw_read_unsigned (get_current_regcache (), IA64_BSP_REGNUM, &bsp);
+  regcache_raw_read_unsigned (get_current_regcache (), IA64_BSPSTORE_REGNUM,
+                              &bspstore);
+
+  /* 1. Memory region before BSPSTORE.  */
+
+  if (addr < bspstore)
+    {
+      short_len = len;
+      if (addr + len > bspstore)
+        short_len = bspstore - addr;
+
+      status = ia64_hpux_xfer_memory_no_bs (ops, annex, readbuf, writebuf,
+					    addr, short_len);
+      if (status <= 0)
+        return 0;
+    }
+
+  /* 2. Memory region after BSP.  */
+
+  if (addr + len > bsp)
+    {
+      start_addr = addr;
+      if (start_addr < bsp)
+        start_addr = bsp;
+      short_len = len + addr - start_addr;
+
+      status = ia64_hpux_xfer_memory_no_bs
+		(ops, annex,
+		 readbuf ? readbuf + (start_addr - addr) : NULL,
+		 writebuf ? writebuf + (start_addr - addr) : NULL,
+		 start_addr, short_len);
+      if (status <= 0)
+	return 0;
+    }
+
+  /* 3. Memory region between BSPSTORE and BSP.  */
+
+  if (bspstore != bsp
+      && ((addr < bspstore && addr + len > bspstore)
+	  || (addr + len <= bsp && addr + len > bsp)))
+    {
+      start_addr = addr;
+      if (addr < bspstore)
+        start_addr = bspstore;
+      short_len = len + addr - start_addr;
+
+      if (start_addr + short_len > bsp)
+        short_len = bsp - start_addr;
+
+      gdb_assert (short_len > 0);
+
+      status = ia64_hpux_xfer_memory_bs
+		 (ops, annex,
+		  readbuf ? readbuf + (start_addr - addr) : NULL,
+		  writebuf ? writebuf + (start_addr - addr) : NULL,
+		  start_addr, short_len);
+      if (status < 0)
+	return 0;
+    }
+
+  return len;
+}
+
+/* The "to_xfer_partial" target_ops routine for ia64-hpux.  */
+
+static LONGEST
+ia64_hpux_xfer_partial (struct target_ops *ops, enum target_object object,
+			const char *annex, gdb_byte *readbuf,
+			const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
+{
+  LONGEST val;
+
+  if (object == TARGET_OBJECT_MEMORY)
+    val = ia64_hpux_xfer_memory (ops, annex, readbuf, writebuf, offset, len);
+  else
+    val = super_xfer_partial (ops, object, annex, readbuf, writebuf, offset,
+			      len);
+
+  return val;
+}
+
+/* The "to_can_use_hw_breakpoint" target_ops routine for ia64-hpux.  */
+
+static int
+ia64_hpux_can_use_hw_breakpoint (int type, int cnt, int othertype)
+{
+  /* No hardware watchpoint/breakpoint support yet.  */
+  return 0;
+}
+
+/* The "to_mourn_inferior" routine from the "inf-ttrace" target_ops layer.  */
+
+static void (*super_mourn_inferior) (struct target_ops *);
+
+/* The "to_mourn_inferior" target_ops routine for ia64-hpux.  */
+
+static void
+ia64_hpux_mourn_inferior (struct target_ops *ops)
+{
+  const int pid = ptid_get_pid (inferior_ptid);
+  int status;
+
+  super_mourn_inferior (ops);
+
+  /* On this platform, the process still exists even after we received
+     an exit event.  Detaching from the process isn't sufficient either,
+     as it only turns the process into a zombie.  So the only solution
+     we found is to kill it.  */
+  ttrace (TT_PROC_EXIT, pid, 0, 0, 0, 0);
+  wait (&status);
+}
+
+/* Prevent warning from -Wmissing-prototypes.  */
+void _initialize_hppa_hpux_nat (void);
+
+void
+_initialize_hppa_hpux_nat (void)
+{
+  struct target_ops *t;
+
+  t = inf_ttrace_target ();
+  super_to_wait = t->to_wait;
+  super_xfer_partial = t->to_xfer_partial;
+  super_mourn_inferior = t->to_mourn_inferior;
+
+  t->to_wait = ia64_hpux_wait;
+  t->to_fetch_registers = ia64_hpux_fetch_registers;
+  t->to_store_registers = ia64_hpux_store_registers;
+  t->to_xfer_partial = ia64_hpux_xfer_partial;
+  t->to_can_use_hw_breakpoint = ia64_hpux_can_use_hw_breakpoint;
+  t->to_mourn_inferior = ia64_hpux_mourn_inferior;
+  t->to_attach_no_wait = 1;
+
+  add_target (t);
+}
diff --git a/gdb/ia64-hpux-tdep.c b/gdb/ia64-hpux-tdep.c
new file mode 100644
index 00000000000..139ff836719
--- /dev/null
+++ b/gdb/ia64-hpux-tdep.c
@@ -0,0 +1,101 @@
+/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
+
+   Copyright (C) 2010 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "ia64-tdep.h"
+#include "ia64-hpux-tdep.h"
+#include "osabi.h"
+#include "gdbtypes.h"
+#include "solib.h"
+
+/* Return nonzero if the value of the register identified by REGNUM
+   can be modified.  */
+
+static int
+ia64_hpux_can_store_ar_register (int regnum)
+{
+  switch (regnum)
+    {
+      case IA64_RSC_REGNUM:
+      case IA64_RNAT_REGNUM:
+      case IA64_CSD_REGNUM:
+      case IA64_SSD_REGNUM:
+      case IA64_CCV_REGNUM:
+      case IA64_UNAT_REGNUM:
+      case IA64_FPSR_REGNUM:
+      case IA64_PFS_REGNUM:
+      case IA64_LC_REGNUM:
+      case IA64_EC_REGNUM:
+         return 1;
+         break;
+
+      default:
+         return 0;
+         break;
+    }
+}
+
+/* The "cannot_store_register" target_ops method.  */
+
+static int
+ia64_hpux_cannot_store_register (struct gdbarch *gdbarch, int regnum)
+{
+  /* General registers.  */
+
+  if (regnum == IA64_GR0_REGNUM)
+    return 1;
+
+  /* FP register.  */
+
+  if (regnum == IA64_FR0_REGNUM || regnum == IA64_FR1_REGNUM)
+    return 1;
+
+  /* Application registers.  */
+  if (regnum >= IA64_AR0_REGNUM && regnum <= IA64_AR0_REGNUM + 127)
+    return (!ia64_hpux_can_store_ar_register (regnum));
+
+  /* We can store all other registers.  */
+  return 0;
+}
+
+/* Should be set to non-NULL if the ia64-hpux solib module is linked in.
+   This may not be the case because the shared library support code can
+   only be compiled on ia64-hpux.  */
+
+struct target_so_ops *ia64_hpux_so_ops = NULL;
+
+static void
+ia64_hpux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
+  set_gdbarch_cannot_store_register (gdbarch, ia64_hpux_cannot_store_register);
+
+  if (ia64_hpux_so_ops)
+    set_solib_ops (gdbarch, ia64_hpux_so_ops);
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+extern initialize_file_ftype _initialize_ia64_hpux_tdep;
+
+void
+_initialize_ia64_hpux_tdep (void)
+{
+  gdbarch_register_osabi (bfd_arch_ia64, 0, GDB_OSABI_HPUX_ELF,
+			  ia64_hpux_init_abi);
+}
diff --git a/gdb/ia64-hpux-tdep.h b/gdb/ia64-hpux-tdep.h
new file mode 100644
index 00000000000..9f92a21d9bc
--- /dev/null
+++ b/gdb/ia64-hpux-tdep.h
@@ -0,0 +1,24 @@
+/* Copyright (C) 2010 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef IA64_HPUX_TDEP_H
+#define IA64_HPUX_TDEP_H
+
+struct target_so_ops;
+extern struct target_so_ops *ia64_hpux_so_ops;
+
+#endif
diff --git a/gdb/solib-ia64-hpux.c b/gdb/solib-ia64-hpux.c
new file mode 100644
index 00000000000..01d44a997fd
--- /dev/null
+++ b/gdb/solib-ia64-hpux.c
@@ -0,0 +1,700 @@
+/* Copyright (C) 2010 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "ia64-tdep.h"
+#include "ia64-hpux-tdep.h"
+#include "solib-ia64-hpux.h"
+#include "solist.h"
+#include "solib.h"
+#include "target.h"
+#include "gdbtypes.h"
+#include "inferior.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "opcode/ia64.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "elf-bfd.h"
+#include "exceptions.h"
+
+/* Need to define the following macro in order to get the complete
+   load_module_desc struct definition in dlfcn.h  Otherwise, it doesn't
+   match the size of the struct the loader is providing us during load
+   events.  */
+#define _LOAD_MODULE_DESC_EXT
+
+#include <sys/ttrace.h>
+#include <dlfcn.h>
+#include <elf.h>
+#include <service_mgr.h>
+
+/* The following is to have access to the definition of type load_info_t.  */
+#include <crt0.h>
+
+/* The r32 pseudo-register number.
+
+   Like all stacked registers, r32 is treated as a pseudo-register,
+   because it is not always available for read/write via the ttrace
+   interface.  */
+/* This is a bit of a hack, as we duplicate something hidden inside
+   ia64-tdep.c, but oh well...  */
+#define IA64_R32_PSEUDO_REGNUM (IA64_NAT127_REGNUM + 2)
+
+/* Our struct so_list private data structure.  */
+
+struct lm_info
+{
+  /* The shared library module descriptor.  We extract this structure
+     from the loader at the time the shared library gets mapped.  */
+  struct load_module_desc module_desc;
+
+  /* The text segment address as defined in the shared library object
+     (this is not the address where this segment got loaded).  This
+     field is initially set to zero, and computed lazily.  */
+  CORE_ADDR text_start;
+
+  /* The data segment address as defined in the shared library object
+     (this is not the address where this segment got loaded).  This
+     field is initially set to zero, and computed lazily.  */
+  CORE_ADDR data_start;
+};
+
+/* The list of shared libraries currently mapped by the inferior.  */
+
+static struct so_list *so_list_head = NULL;
+
+/* Create a new so_list element.  The result should be deallocated
+   when no longer in use.  */
+
+static struct so_list *
+new_so_list (char *so_name, struct load_module_desc module_desc)
+{
+  struct so_list *new_so;
+
+  new_so = (struct so_list *) XZALLOC (struct so_list);
+  new_so->lm_info = (struct lm_info *) XZALLOC (struct lm_info);
+  new_so->lm_info->module_desc = module_desc;
+
+  strncpy (new_so->so_name, so_name, SO_NAME_MAX_PATH_SIZE - 1);
+  new_so->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
+  strcpy (new_so->so_original_name, new_so->so_name);
+
+  return new_so;
+}
+
+/* Return non-zero if the instruction at the current PC is a breakpoint
+   part of the dynamic loading process.
+
+   We identify such instructions by checking that the instruction at
+   the current pc is a break insn where no software breakpoint has been
+   inserted by us.  We also verify that the operands have specific
+   known values, to be extra certain.
+
+   PTID is the ptid of the thread that should be checked, but this
+   function also assumes that inferior_ptid is already equal to PTID.
+   Ideally, we would like to avoid the requirement on inferior_ptid,
+   but many routines still use the inferior_ptid global to access
+   the relevant thread's register and memory.  We still have the ptid
+   as parameter to be able to pass it to the routines that do take a ptid
+   - that way we avoid increasing explicit uses of the inferior_ptid
+   global.  */
+
+static int
+ia64_hpux_at_dld_breakpoint_1_p (ptid_t ptid)
+{
+  struct regcache *regcache = get_thread_regcache (ptid);
+  CORE_ADDR pc = regcache_read_pc (regcache);
+  struct address_space *aspace = get_regcache_aspace (regcache);
+  ia64_insn t0, t1, slot[3], template, insn;
+  int slotnum;
+  bfd_byte bundle[16];
+
+  /* If this is a regular breakpoint, then it can not be a dld one.  */
+  if (breakpoint_inserted_here_p (aspace, pc))
+    return 0;
+
+  slotnum = ((long) pc) & 0xf;
+  if (slotnum > 2)
+    internal_error (__FILE__, __LINE__,
+		    "invalid slot (%d) for address %s", slotnum,
+		    paddress (get_regcache_arch (regcache), pc));
+
+  pc -= (pc & 0xf);
+  read_memory (pc, bundle, sizeof (bundle));
+
+  /* bundles are always in little-endian byte order */
+  t0 = bfd_getl64 (bundle);
+  t1 = bfd_getl64 (bundle + 8);
+  template = (t0 >> 1) & 0xf;
+  slot[0] = (t0 >>  5) & 0x1ffffffffffLL;
+  slot[1] = ((t0 >> 46) & 0x3ffff) | ((t1 & 0x7fffff) << 18);
+  slot[2] = (t1 >> 23) & 0x1ffffffffffLL;
+
+  if (template == 2 && slotnum == 1)
+    {
+      /* skip L slot in MLI template: */
+      slotnum = 2;
+    }
+
+  insn = slot[slotnum];
+
+  return (insn == 0x1c0c9c0       /* break.i 0x070327 */
+          || insn == 0x3c0c9c0);  /* break.i 0x0f0327 */
+}
+
+/* Same as ia64_hpux_at_dld_breakpoint_1_p above, with the following
+   differences: It temporarily sets inferior_ptid to PTID, and also
+   contains any exception being raised.  */
+
+int
+ia64_hpux_at_dld_breakpoint_p (ptid_t ptid)
+{
+  struct gdb_exception e;
+  ptid_t saved_ptid = inferior_ptid;
+  int result = 0;
+
+  inferior_ptid = ptid;
+  TRY_CATCH (e, RETURN_MASK_ALL)
+    {
+      result = ia64_hpux_at_dld_breakpoint_1_p (ptid);
+    }
+  inferior_ptid = saved_ptid;
+  if (e.reason < 0)
+    warning (_("error while checking for dld breakpoint: %s"), e.message);
+
+  return result;
+}
+
+/* Handler for library load event: Read the information provided by
+   the loader, and then use it to read the shared library symbols.  */
+
+static void
+ia64_hpux_handle_load_event (struct regcache *regcache)
+{
+  CORE_ADDR module_desc_addr;
+  ULONGEST module_desc_size;
+  CORE_ADDR so_path_addr;
+  char so_path[MAXPATHLEN];
+  struct load_module_desc module_desc;
+  struct so_list *new_so;
+
+  /* Extract the data provided by the loader as follow:
+       - r33: Address of load_module_desc structure
+       - r34: size of struct load_module_desc
+       - r35: Address of string holding shared library path
+   */
+  regcache_cooked_read_unsigned (regcache, IA64_R32_PSEUDO_REGNUM + 1,
+                                 &module_desc_addr);
+  regcache_cooked_read_unsigned (regcache, IA64_R32_PSEUDO_REGNUM + 2,
+                                 &module_desc_size);
+  regcache_cooked_read_unsigned (regcache, IA64_R32_PSEUDO_REGNUM + 3,
+                                 &so_path_addr);
+
+  if (module_desc_size != sizeof (struct load_module_desc))
+    warning (_("load_module_desc size (%ld) != size returned by kernel (%s)"),
+             sizeof (struct load_module_desc),
+	     pulongest (module_desc_size));
+
+  read_memory_string (so_path_addr, so_path, MAXPATHLEN);
+  read_memory (module_desc_addr, (gdb_byte *) &module_desc,
+	       sizeof (module_desc));
+
+  /* Create a new so_list element and insert it at the start of our
+     so_list_head (we insert at the start of the list only because
+     it is less work compared to inserting it elsewhere).  */
+  new_so = new_so_list (so_path, module_desc);
+  new_so->next = so_list_head;
+  so_list_head = new_so;
+}
+
+/* Update the value of the PC to point to the begining of the next
+   instruction bundle.  */
+
+static void
+ia64_hpux_move_pc_to_next_bundle (struct regcache *regcache)
+{
+  CORE_ADDR pc = regcache_read_pc (regcache);
+
+  pc -= pc & 0xf;
+  pc += 16;
+  ia64_write_pc (regcache, pc);
+}
+
+/* Handle loader events.
+
+   PTID is the ptid of the thread corresponding to the event being
+   handled.  Similarly to ia64_hpux_at_dld_breakpoint_1_p, this
+   function assumes that inferior_ptid is set to PTID.  */
+
+static void
+ia64_hpux_handle_dld_breakpoint_1 (ptid_t ptid)
+{
+  struct regcache *regcache = get_thread_regcache (ptid);
+  ULONGEST arg0;
+
+  /* The type of event is provided by the loaded via r32.  */
+  regcache_cooked_read_unsigned (regcache, IA64_R32_PSEUDO_REGNUM, &arg0);
+  switch (arg0)
+    {
+      case BREAK_DE_SVC_LOADED:
+	/* Currently, the only service loads are uld and dld,
+	   so we shouldn't need to do anything.  Just ignore.  */
+	break;
+      case BREAK_DE_LIB_LOADED:
+	ia64_hpux_handle_load_event (regcache);
+	solib_add (NULL, 0, &current_target, auto_solib_add);
+	break;
+      case BREAK_DE_LIB_UNLOADED:
+      case BREAK_DE_LOAD_COMPLETE:
+      case BREAK_DE_BOR:
+	/* Ignore for now.  */
+	break;
+    }
+
+  /* Now that we have handled the event, we can move the PC to
+     the next instruction bundle, past the break instruction.  */
+  ia64_hpux_move_pc_to_next_bundle (regcache);
+}
+
+/* Same as ia64_hpux_handle_dld_breakpoint_1 above, with the following
+   differences: This function temporarily sets inferior_ptid to PTID,
+   and also contains any exception.  */
+
+void
+ia64_hpux_handle_dld_breakpoint (ptid_t ptid)
+{
+  struct gdb_exception e;
+  ptid_t saved_ptid = inferior_ptid;
+
+  inferior_ptid = ptid;
+  TRY_CATCH (e, RETURN_MASK_ALL)
+    {
+      ia64_hpux_handle_dld_breakpoint_1 (ptid);
+    }
+  inferior_ptid = saved_ptid;
+  if (e.reason < 0)
+    warning (_("error detected while handling dld breakpoint: %s"), e.message);
+}
+
+/* Find the address of the code and data segments in ABFD, and update
+   TEXT_START and DATA_START accordingly.  */
+
+static void
+ia64_hpux_find_start_vma (bfd *abfd, CORE_ADDR *text_start,
+                          CORE_ADDR *data_start)
+{
+  Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
+  Elf64_Phdr phdr;
+  int i;
+
+  *text_start = 0;
+  *data_start = 0;
+
+  if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
+    error (_("invalid program header offset in %s"), abfd->filename);
+
+  for (i = 0; i < i_ehdrp->e_phnum; i++)
+    {
+      if (bfd_bread ((PTR) & phdr, sizeof (phdr), abfd) != sizeof (phdr))
+        error (_("failed to read segment %d in %s"), i, abfd->filename);
+
+      if (phdr.p_flags & PF_X
+          && (*text_start == 0 || phdr.p_vaddr < *text_start))
+        *text_start = phdr.p_vaddr;
+
+      if (phdr.p_flags & PF_W
+          && (*data_start == 0 || phdr.p_vaddr < *data_start))
+        *data_start = phdr.p_vaddr;
+    }
+}
+
+/* The "relocate_section_addresses" target_so_ops routine for ia64-hpux.  */
+
+static void
+ia64_hpux_relocate_section_addresses (struct so_list *so,
+				      struct target_section *sec)
+{
+  CORE_ADDR offset = 0;
+
+  /* If we haven't computed the text & data segment addresses, do so now.
+     We do this here, because we now have direct access to the associated
+     bfd, whereas we would have had to open our own if we wanted to do it
+     while processing the library-load event.  */
+  if (so->lm_info->text_start == 0 && so->lm_info->data_start == 0)
+    ia64_hpux_find_start_vma (sec->bfd, &so->lm_info->text_start,
+			      &so->lm_info->data_start);
+
+  /* Determine the relocation offset based on which segment
+     the section belongs to.  */
+  if ((so->lm_info->text_start < so->lm_info->data_start
+       && sec->addr < so->lm_info->data_start)
+      || (so->lm_info->text_start > so->lm_info->data_start
+          && sec->addr >= so->lm_info->text_start))
+    offset = so->lm_info->module_desc.text_base - so->lm_info->text_start;
+  else if ((so->lm_info->text_start < so->lm_info->data_start
+            && sec->addr >= so->lm_info->data_start)
+           || (so->lm_info->text_start > so->lm_info->data_start
+	       && sec->addr < so->lm_info->text_start))
+    offset = so->lm_info->module_desc.data_base - so->lm_info->data_start;
+
+  /* And now apply the relocation.  */
+  sec->addr += offset;
+  sec->endaddr += offset;
+
+  /* Best effort to set addr_high/addr_low.  This is used only by
+     'info sharedlibrary'.  */
+  if (so->addr_low == 0 || sec->addr < so->addr_low)
+    so->addr_low = sec->addr;
+
+  if (so->addr_high == 0 || sec->endaddr > so->addr_high)
+    so->addr_high = sec->endaddr;
+}
+
+/* The "free_so" target_so_ops routine for ia64-hpux.  */
+
+static void
+ia64_hpux_free_so (struct so_list *so)
+{
+  xfree (so->lm_info);
+}
+
+/* The "clear_solib" target_so_ops routine for ia64-hpux.  */
+
+static void
+ia64_hpux_clear_solib (void)
+{
+  struct so_list *so;
+
+  while (so_list_head != NULL)
+    {
+      so = so_list_head;
+      so_list_head = so_list_head->next;
+
+      ia64_hpux_free_so (so);
+      xfree (so);
+    }
+}
+
+/* Assuming the inferior just stopped on an EXEC event, return
+   the address of the load_info_t structure.  */
+
+static CORE_ADDR
+ia64_hpux_get_load_info_addr (void)
+{
+  struct type *data_ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr;
+  CORE_ADDR addr;
+  int status;
+
+  /* The address of the load_info_t structure is stored in the 4th
+     argument passed to the initial thread of the process (in other
+     words, in argv[3]).  So get the address of these arguments,
+     and extract the 4th one.  */
+  status = ttrace (TT_PROC_GET_ARGS, ptid_get_pid (inferior_ptid),
+		   0, (uintptr_t) &addr, sizeof (CORE_ADDR), 0);
+  if (status == -1 && errno)
+    perror_with_name (_("Unable to get argument list"));
+  return (read_memory_typed_address (addr + 3 * 8, data_ptr_type));
+}
+
+/* A structure used to aggregate some information extracted from
+   the dynamic section of the main executable.  */
+
+struct dld_info
+{
+  long long dld_flags;
+  CORE_ADDR load_map;
+};
+
+/* Scan the ".dynamic" section referenced by ABFD and DYN_SECT,
+   and extract the information needed to fill in INFO.  */
+
+static void
+ia64_hpux_read_dynamic_info (struct gdbarch *gdbarch, bfd *abfd,
+			     asection *dyn_sect, struct dld_info *info)
+{
+  int sect_size;
+  char *buf;
+  char *buf_end;
+
+  /* Make sure that info always has initialized data, even if we fail
+     to read the syn_sect section.  */
+  memset (info, 0, sizeof (struct dld_info));
+
+  sect_size = bfd_section_size (abfd, dyn_sect);
+  buf = alloca (sect_size);
+  buf_end = buf + sect_size;
+
+  if (bfd_seek (abfd, dyn_sect->filepos, SEEK_SET) != 0
+      || bfd_bread (buf, sect_size, abfd) != sect_size)
+    error (_("failed to read contents of .dynamic section"));
+
+  for (; buf < buf_end; buf += sizeof (Elf64_Dyn))
+    {
+      Elf64_Dyn *dynp = (Elf64_Dyn *) buf;
+      Elf64_Sxword d_tag;
+
+      d_tag = bfd_h_get_64 (abfd, &dynp->d_tag);
+      switch (d_tag)
+        {
+          case DT_HP_DLD_FLAGS:
+            info->dld_flags = bfd_h_get_64 (abfd, &dynp->d_un);
+            break;
+
+          case DT_HP_LOAD_MAP:
+            {
+              CORE_ADDR load_map_addr = bfd_h_get_64 (abfd, &dynp->d_un.d_ptr);
+
+              if (target_read_memory (load_map_addr, (char *) &info->load_map,
+                                      sizeof (info->load_map)) != 0)
+		error (_("failed to read load map at %s"),
+		       paddress (gdbarch, load_map_addr));
+            }
+            break;
+        }
+    }
+}
+
+/* Wrapper around target_read_memory used with libdl.  */
+
+static void *
+ia64_hpux_read_tgt_mem (void *buffer, uint64_t ptr, size_t bufsiz, int ident)
+{
+  if (target_read_memory (ptr, (gdb_byte *) buffer, bufsiz) != 0)
+    return 0;
+  else
+    return buffer;
+}
+
+/* Create a new so_list object for a shared library, and store that
+   new so_list object in our SO_LIST_HEAD list.
+
+   SO_INDEX is an index specifying the placement of the loaded shared
+   library in the dynamic loader's search list.  Normally, this index
+   is strictly positive, but an index of -1 refers to the loader itself.
+
+   Return nonzero if the so_list object could be created.  A null
+   return value with a positive SO_INDEX normally means that there are
+   no more entries in the dynamic loader's search list at SO_INDEX or
+   beyond.  */
+
+static int
+ia64_hpux_add_so_from_dld_info (struct dld_info info, int so_index)
+{
+  struct load_module_desc module_desc;
+  uint64_t so_handle;
+  char *so_path;
+  struct so_list *so;
+
+  so_handle = dlgetmodinfo (so_index, &module_desc, sizeof (module_desc),
+			    ia64_hpux_read_tgt_mem, 0, info.load_map);
+
+  if (so_handle == 0)
+    /* No such entry.  We probably reached the end of the list.  */
+    return 0;
+
+  so_path = dlgetname (&module_desc, sizeof (module_desc),
+                       ia64_hpux_read_tgt_mem, 0, info.load_map);
+  if (so_path == NULL)
+    {
+      /* Should never happen, but let's not crash if it does.  */
+      warning (_("unable to get shared library name, symbols not loaded"));
+      return 0;
+    }
+
+  /* Create a new so_list and insert it at the start of our list.
+     The order is not extremely important, but it's less work to do so
+     at the end of the list.  */
+  so = new_so_list (so_path, module_desc);
+  so->next = so_list_head;
+  so_list_head = so;
+
+  return 1;
+}
+
+/* Assuming we just attached to a process, update our list of shared
+   libraries (SO_LIST_HEAD) as well as GDB's list.  */
+
+static void
+ia64_hpux_solib_add_after_attach (void)
+{
+  bfd *abfd;
+  asection *dyn_sect;
+  struct dld_info info;
+  int i;
+
+  if (symfile_objfile == NULL)
+    return;
+
+  abfd = symfile_objfile->obfd;
+  dyn_sect = bfd_get_section_by_name (abfd, ".dynamic");
+
+  if (dyn_sect == NULL || bfd_section_size (abfd, dyn_sect) == 0)
+    return;
+
+  ia64_hpux_read_dynamic_info (get_objfile_arch (symfile_objfile), abfd,
+			       dyn_sect, &info);
+
+  if ((info.dld_flags & DT_HP_DEBUG_PRIVATE) == 0)
+    {
+      warning (_(
+"The shared libraries were not privately mapped; setting a breakpoint\n\
+in a shared library will not work until you rerun the program.\n\
+Use the following command to enable debugging of shared libraries.\n\
+chatr +dbg enable a.out"));
+    }
+
+  /* Read the symbols of the dynamic loader (dld.so).  */
+  ia64_hpux_add_so_from_dld_info (info, -1);
+
+  /* Read the symbols of all the other shared libraries.  */
+  for (i = 1; ; i++)
+    if (!ia64_hpux_add_so_from_dld_info (info, i))
+      break;  /* End of list.  */
+
+  /* Resync the library list at the core level.  */
+  solib_add (NULL, 1, &current_target, auto_solib_add);
+}
+
+/* The "create_inferior_hook" target_so_ops routine for ia64-hpux.  */
+
+static void
+ia64_hpux_solib_create_inferior_hook (int from_tty)
+{
+  CORE_ADDR load_info_addr;
+  load_info_t load_info;
+
+  /* Initially, we were thinking about adding a check that the program
+     (accessible through symfile_objfile) was linked against some shared
+     libraries, by searching for a ".dynamic" section.  However, could
+     this break in the case of a statically linked program that later
+     uses dlopen?  Programs that are fully statically linked are very
+     rare, and we will worry about them when we encounter one that
+     causes trouble.  */
+
+  /* Set the LI_TRACE flag in the load_info_t structure.  This enables
+     notifications when shared libraries are being mapped.  */
+  load_info_addr = ia64_hpux_get_load_info_addr ();
+  read_memory (load_info_addr, (gdb_byte *) &load_info, sizeof (load_info));
+  load_info.li_flags |= LI_TRACE;
+  write_memory (load_info_addr, (gdb_byte *) &load_info, sizeof (load_info));
+
+  /* If we just attached to our process, some shard libraries have
+     already been mapped.  Find which ones they are...  */
+  if (current_inferior ()->attach_flag)
+    ia64_hpux_solib_add_after_attach ();
+}
+
+/* The "special_symbol_handling" target_so_ops routine for ia64-hpux.  */
+
+static void
+ia64_hpux_special_symbol_handling (void)
+{
+  /* Nothing to do.  */
+}
+
+/* The "current_sos" target_so_ops routine for ia64-hpux.  */
+
+static struct so_list *
+ia64_hpux_current_sos (void)
+{
+  /* Return a deep copy of our own list.  */
+  struct so_list *new_head = NULL, *prev_new_so = NULL;
+  struct so_list *our_so;
+
+  for (our_so = so_list_head; our_so != NULL; our_so = our_so->next)
+    {
+      struct so_list *new_so;
+
+      new_so = new_so_list (our_so->so_name, our_so->lm_info->module_desc);
+      if (prev_new_so != NULL)
+        prev_new_so->next = new_so;
+      prev_new_so = new_so;
+      if (new_head == NULL)
+        new_head = new_so;
+    }
+
+  return new_head;
+}
+
+/* The "open_symbol_file_object" target_so_ops routine for ia64-hpux.  */
+
+static int
+ia64_hpux_open_symbol_file_object (void *from_ttyp)
+{
+  return 0;
+}
+
+/* The "in_dynsym_resolve_code" target_so_ops routine for ia64-hpux.  */
+
+static int
+ia64_hpux_in_dynsym_resolve_code (CORE_ADDR pc)
+{
+  return 0;
+}
+
+/* If FADDR is the address of a function inside one of the shared
+   libraries, return the shared library linkage address.  */
+
+CORE_ADDR
+ia64_hpux_get_solib_linkage_addr (CORE_ADDR faddr)
+{
+  struct so_list *so = so_list_head;
+
+  while (so != NULL)
+    {
+      struct load_module_desc module_desc = so->lm_info->module_desc;
+
+      if (module_desc.text_base <= faddr
+          && (module_desc.text_base + module_desc.text_size) > faddr)
+        return module_desc.linkage_ptr;
+
+      so = so->next;
+    }
+
+  return 0;
+}
+
+/* Create a new target_so_ops structure suitable for ia64-hpux, and
+   return its address.  */
+
+static struct target_so_ops *
+ia64_hpux_target_so_ops (void)
+{
+  struct target_so_ops *ops = XZALLOC (struct target_so_ops);
+
+  ops->relocate_section_addresses = ia64_hpux_relocate_section_addresses;
+  ops->free_so = ia64_hpux_free_so;
+  ops->clear_solib = ia64_hpux_clear_solib;
+  ops->solib_create_inferior_hook = ia64_hpux_solib_create_inferior_hook;
+  ops->special_symbol_handling = ia64_hpux_special_symbol_handling;
+  ops->current_sos = ia64_hpux_current_sos;
+  ops->open_symbol_file_object = ia64_hpux_open_symbol_file_object;
+  ops->in_dynsym_resolve_code = ia64_hpux_in_dynsym_resolve_code;
+  ops->bfd_open = solib_bfd_open;
+
+  return ops;
+}
+
+/* Prevent warning from -Wmissing-prototypes.  */
+void _initialize_solib_ia64_hpux (void);
+
+void
+_initialize_solib_ia64_hpux (void)
+{
+  ia64_hpux_so_ops = ia64_hpux_target_so_ops ();
+}
diff --git a/gdb/solib-ia64-hpux.h b/gdb/solib-ia64-hpux.h
new file mode 100644
index 00000000000..11b1a901891
--- /dev/null
+++ b/gdb/solib-ia64-hpux.h
@@ -0,0 +1,25 @@
+/* Copyright (C) 2010 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef SOLIB_IA64_HPUX_H
+#define SOLIB_IA64_HPUX_H
+
+int ia64_hpux_at_dld_breakpoint_p (ptid_t ptid);
+void ia64_hpux_handle_dld_breakpoint (ptid_t ptid);
+CORE_ADDR ia64_hpux_get_solib_linkage_addr (CORE_ADDR faddr);
+
+#endif