2007-09-04 Michael Snyder <msnyder@access-company.com>

[deliverable/binutils-gdb.git] / gdb / sparc64fbsd-nat.c

diff --git a/gdb/sparc64fbsd-nat.c b/gdb/sparc64fbsd-nat.c
index dab419ae3beae64e554b2c1170477c00138d8199..e6a6b25e01c1c2727df7506686fca7224209c113 100644 (file)
--- a/gdb/sparc64fbsd-nat.c
+++ b/gdb/sparc64fbsd-nat.c
@@ -1,12 +1,12 @@
 /* Native-dependent code for FreeBSD/sparc64.
 
-   Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2007 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 2 of the License, or
+   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,
@@ -15,16 +15,50 @@
    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, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
+#include "regcache.h"
 #include "target.h"
 
 #include "fbsd-nat.h"
 #include "sparc64-tdep.h"
 #include "sparc-nat.h"
+\f
+
+/* Support for debugging kernel virtual memory images.  */
+
+#include <sys/types.h>
+#include <machine/pcb.h>
+
+#include "bsd-kvm.h"
+
+static int
+sparc64fbsd_kvm_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+  /* The following is true for FreeBSD 5.4:
+
+     The pcb contains %sp and %pc.  Since the register windows are
+     explicitly flushed, we can find the `local' and `in' registers on
+     the stack.  */
+
+  /* The stack pointer shouldn't be zero.  */
+  if (pcb->pcb_sp == 0)
+    return 0;
+
+  regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
+  regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);
+
+  /* Synthesize %npc.  */
+  pcb->pcb_pc += 4;
+  regcache_raw_supply (regcache, SPARC64_NPC_REGNUM, &pcb->pcb_pc);
+
+  /* Read `local' and `in' registers from the stack.  */
+  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
+
+  return 1;
+}
+\f
 
 /* Provide a prototype to silence -Wmissing-prototypes.  */
 void _initialize_sparc64fbsd_nat (void);
@@ -42,4 +76,7 @@ _initialize_sparc64fbsd_nat (void)
   add_target (t);
 
   sparc_gregset = &sparc64fbsd_gregset;
+
+  /* Support debugging kernel virtual memory images.  */
+  bsd_kvm_add_target (sparc64fbsd_kvm_supply_pcb);
 }