From a770d4eca642f4ae0d2e2e8d04a76933afed7b78 Mon Sep 17 00:00:00 2001
From: Mark Kettenis <kettenis@gnu.org>
Date: Sat, 22 May 2004 22:34:44 +0000
Subject: [PATCH] * sparcnbsd-nat.c: Include "gdbcore.h", "regcache.h",
 <sys/types.h>, <machine/pcb.h> and "bsd-kvm.h". (sparc32nbsd_supply_pcb): New
 function. (_initialize_sparcnbsd_nat): Enable libkvm interface. * Makefile.in
 (sparcnbsd-nat.o): Update dependencies. * config/sparc/nbsdelf.mh
 (NATDEPFILES): Add bsd-kvm.o. (LOADLIBES): New variable.

---
 gdb/ChangeLog               | 10 ++++++++++
 gdb/Makefile.in             |  3 ++-
 gdb/config/sparc/nbsdelf.mh |  4 +++-
 gdb/sparcnbsd-nat.c         | 37 +++++++++++++++++++++++++++++++++++++
 4 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f95f533..30772fb 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2004-05-23  Mark Kettenis  <kettenis@gnu.org>
+
+	* sparcnbsd-nat.c: Include "gdbcore.h", "regcache.h",
+	<sys/types.h>, <machine/pcb.h> and "bsd-kvm.h".
+	(sparc32nbsd_supply_pcb): New function.
+	(_initialize_sparcnbsd_nat): Enable libkvm interface.
+	* Makefile.in (sparcnbsd-nat.o): Update dependencies.
+	* config/sparc/nbsdelf.mh (NATDEPFILES): Add bsd-kvm.o.
+	(LOADLIBES): New variable.
+
 2004-05-22  Mark Kettenis  <kettenis@gnu.org>
 
 	* bsd-kvm.c, bsd-kvm.h: New files.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index f10df4e..d2ef0bb 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -2394,7 +2394,8 @@ sparc-linux-tdep.o: sparc-linux-tdep.c $(defs_h) $(floatformat_h) $(frame_h) \
 sparc-nat.o: sparc-nat.c $(defs_h) $(inferior_h) $(regcache_h) $(target_h) \
 	$(gdb_assert_h) $(gdb_string_h) $(gdb_wait_h) $(sparc_tdep_h) \
 	$(sparc_nat_h)
-sparcnbsd-nat.o: sparcnbsd-nat.c $(defs_h) $(sparc_tdep_h) $(sparc_nat_h)
+sparcnbsd-nat.o: sparcnbsd-nat.c $(defs_h) $(gdbcore_h) $(regcache_h) \
+	$(sparc_tdep_h) $(sparc_nat_h) $(bsd_kvm_h)
 sparcnbsd-tdep.o: sparcnbsd-tdep.c $(defs_h) $(floatformat_h) $(frame_h) \
 	$(frame_unwind_h) $(gdbcore_h) $(osabi_h) $(regcache_h) $(regset_h) \
 	$(solib_svr4_h) $(symtab_h) $(trad_frame_h) $(gdb_assert_h) \
diff --git a/gdb/config/sparc/nbsdelf.mh b/gdb/config/sparc/nbsdelf.mh
index 45309ec..611a6a4 100644
--- a/gdb/config/sparc/nbsdelf.mh
+++ b/gdb/config/sparc/nbsdelf.mh
@@ -1,4 +1,6 @@
 # Host: NetBSD/sparc ELF
-NATDEPFILES= sparc-nat.o sparcnbsd-nat.o \
+NATDEPFILES= sparc-nat.o sparcnbsd-nat.o bsd-kvm.o \
 	fork-child.o infptrace.o inftarg.o
 NAT_FILE= nm-nbsd.h
+
+LOADLIBES= -lkvm
diff --git a/gdb/sparcnbsd-nat.c b/gdb/sparcnbsd-nat.c
index 9038ea3..01089ee 100644
--- a/gdb/sparcnbsd-nat.c
+++ b/gdb/sparcnbsd-nat.c
@@ -20,10 +20,44 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "defs.h"
+#include "gdbcore.h"
+#include "regcache.h"
 
 #include "sparc-tdep.h"
 #include "sparc-nat.h"
 
+/* Support for debugging kernel virtual memory images.  */
+
+#include <sys/types.h>
+#include <machine/pcb.h>
+
+#include "bsd-kvm.h"
+
+static int
+sparc32nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+  /* The following is true for NetBSD 1.6.2:
+
+     The pcb contains %sp, %sp, %psr and %wim.  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;
+
+  regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
+  regcache_raw_supply (regcache, SPARC_O7_REGNUM, &pcb->pcb_pc);
+  regcache_raw_supply (regcache, SPARC32_PSR_REGNUM, &pcb->pcb_psr);
+  regcache_raw_supply (regcache, SPARC32_WIM_REGNUM, &pcb->pcb_wim);
+  regcache_raw_supply (regcache, SPARC32_PC_REGNUM, &pcb->pcb_pc);
+
+  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
+
+  return 1;
+}
+
+
 /* Provide a prototype to silence -Wmissing-prototypes.  */
 void _initialize_sparcnbsd_nat (void);
 
@@ -31,4 +65,7 @@ void
 _initialize_sparcnbsd_nat (void)
 {
   sparc_gregset = &sparc32nbsd_gregset;
+
+  /* Support debugging kernel virtual memory images.  */
+  bsd_kvm_add_target (sparc32nbsd_supply_pcb);
 }
-- 
2.7.4