Enable rthreads supports on OpenBSD/sparc64.

gdb/ChangeLog:

        * configure.host (sparc64-*-openbsd*): Set gdb_host to obsd64.
        * config/sparc/obsd64.mh: New file.
        * sparc64obsd-nat.c: New file.

4 files changed, 141 insertions, 1 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0633829..ff01d2b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,9 @@
 2014-02-28  Mark Kettenis  <kettenis@gnu.org>
 
+	* configure.host (sparc64-*-openbsd*): Set gdb_host to obsd64.
+	* config/sparc/obsd64.mh: New file.
+	* sparc64obsd-nat.c: New file.
+
 	* obsd-nat.h: New file.
 	* obsd-nat.c: New file.
 	* Makefile.in (HFILES_NO_SRCDIR): Add obsd-nat.h.
diff --git a/gdb/config/sparc/obsd64.mh b/gdb/config/sparc/obsd64.mh
new file mode 100644
index 0000000..d15e34d
--- /dev/null
+++ b/gdb/config/sparc/obsd64.mh
@@ -0,0 +1,5 @@
+# Host: OpenBSD/sparc64
+NATDEPFILES= fork-child.o inf-ptrace.o obsd-nat.o \
+	sparc64obsd-nat.o sparc-nat.o bsd-kvm.o
+
+LOADLIBES= -lkvm
diff --git a/gdb/configure.host b/gdb/configure.host
index 634213f..15a8288 100644
--- a/gdb/configure.host
+++ b/gdb/configure.host
@@ -164,7 +164,7 @@ sparc-*-netbsdelf* | sparc-*-knetbsd*-gnu)
 sparc64-*-netbsd* | sparc64-*-knetbsd*-gnu)
 			gdb_host=nbsd64 ;;
 sparc-*-openbsd*)	gdb_host=nbsdelf ;;
-sparc64-*-openbsd*)	gdb_host=nbsd64 ;;
+sparc64-*-openbsd*)	gdb_host=obsd64 ;;
 sparc-*-solaris2* | sparcv9-*-solaris2* | sparc64-*-solaris2*)
 			gdb_host=sol2
 			;;
diff --git a/gdb/sparc64obsd-nat.c b/gdb/sparc64obsd-nat.c
new file mode 100644
index 0000000..a6cf8b3
--- /dev/null
+++ b/gdb/sparc64obsd-nat.c
@@ -0,0 +1,131 @@
+/* Native-dependent code for OpenBSD/sparc64.
+
+   Copyright (C) 2003-2014 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 "gdbcore.h"
+#include "regcache.h"
+#include "target.h"
+
+#include "sparc64-tdep.h"
+#include "sparc-nat.h"
+#include "obsd-nat.h"
+
+/* Determine whether `gregset_t' contains register REGNUM.  */
+
+static int
+sparc64obsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
+{
+  /* Integer registers.  */
+  if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
+      || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
+      || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
+      || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
+    return 1;
+
+  /* Control registers.  */
+  if (regnum == SPARC64_PC_REGNUM
+      || regnum == SPARC64_NPC_REGNUM
+      || regnum == SPARC64_STATE_REGNUM
+      || regnum == SPARC64_Y_REGNUM)
+    return 1;
+
+  return 0;
+}
+
+/* Determine whether `fpregset_t' contains register REGNUM.  */
+
+static int
+sparc64obsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
+{
+  /* Floating-point registers.  */
+  if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
+      || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
+    return 1;
+
+  /* Control registers.  */
+  if (regnum == SPARC64_FSR_REGNUM)
+    return 1;
+
+  return 0;
+}
+
+
+/* Support for debugging kernel virtual memory images.  */
+
+#include <sys/types.h>
+#include <machine/pcb.h>
+
+#include "bsd-kvm.h"
+
+static int
+sparc64obsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+  u_int64_t state;
+  int regnum;
+
+  /* The following is true for OpenBSD 3.0:
+
+     The pcb contains %sp and %pc, %pstate and %cwp.  From this
+     information we reconstruct the register state as it would look
+     when we just returned from cpu_switch().  */
+
+  /* The stack pointer shouldn't be zero.  */
+  if (pcb->pcb_sp == 0)
+    return 0;
+
+  /* If the program counter is zero, this is probably a core dump, and
+     we can get %pc from the stack.  */
+  if (pcb->pcb_pc == 0)
+      read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8), 
+		  (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc);
+
+  regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
+  regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);
+
+  state = pcb->pcb_pstate << 8 | pcb->pcb_cwp;
+  regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state);
+
+  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
+
+  return 1;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_sparc64obsd_nat (void);
+
+void
+_initialize_sparc64obsd_nat (void)
+{
+  sparc_supply_gregset = sparc64_supply_gregset;
+  sparc_collect_gregset = sparc64_collect_gregset;
+  sparc_supply_fpregset = sparc64_supply_fpregset;
+  sparc_collect_fpregset = sparc64_collect_fpregset;
+  sparc_gregset_supplies_p = sparc64obsd_gregset_supplies_p;
+  sparc_fpregset_supplies_p = sparc64obsd_fpregset_supplies_p;
+
+  sparc_gregset = &sparc64nbsd_gregset;
+  sparc_fpregset = &sparc64_bsd_fpregset;
+
+  /* Add some extra features to the generic SPARC target.  */
+  obsd_add_target (sparc_target ());
+
+  /* Support debugging kernel virtual memory images.  */
+  bsd_kvm_add_target (sparc64obsd_supply_pcb);
+}