[RFA] BSD KVM support for NetBSD/powerpc

["Nathan J. Williams" <nathanw at wasabisystems dot com>]

Pretty much like it says. 

2004-08-05  Nathan J. Williams  <nathanw@wasabisystems.com>

	* ppcnbsd-nat.c: Include <machine/frame.h>, <machine/pcb.h>,
	"gdbcore.h", "regcache.h", and "bsd-kvm.h".
	(ppcnbsd_supply_pcb): New function.
	(_initialize_ppcnbsd_nat): New prototype and function.
	* config/powerpc/nbsd.mh (NATDEPFILES): Add bsd-kvm.o.
	(LOADLIBES): New variable.
	* Makefile.in (ppcnbsd-nat.o): Update dependencies.



Index: gdb/ppcnbsd-nat.c
===================================================================
RCS file: /cvs/src/src/gdb/ppcnbsd-nat.c,v
retrieving revision 1.15
diff -u -r1.15 ppcnbsd-nat.c
--- gdb/ppcnbsd-nat.c	13 May 2004 19:27:07 -0000	1.15
+++ gdb/ppcnbsd-nat.c	5 Aug 2004 18:44:31 -0000
@@ -1,5 +1,5 @@
 /* Native-dependent code for PowerPC's running NetBSD, for GDB.
-   Copyright 2002 Free Software Foundation, Inc.
+   Copyright 2002, 2004 Free Software Foundation, Inc.
    Contributed by Wasabi Systems, Inc.
 
    This file is part of GDB.
@@ -22,10 +22,15 @@
 #include <sys/types.h>
 #include <sys/ptrace.h>
 #include <machine/reg.h>
+#include <machine/frame.h>
+#include <machine/pcb.h>
 
 #include "defs.h"
 #include "inferior.h"
 #include "gdb_assert.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "bsd-kvm.h"
 
 #include "ppc-tdep.h"
 #include "ppcnbsd-tdep.h"
@@ -134,3 +139,44 @@
 	perror_with_name ("Couldn't set FP registers");
     }
 }
+
+static int
+ppcnbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+  struct switchframe sf;
+  struct callframe cf;
+  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+  int i;
+
+  /* The stack pointer shouldn't be zero.  */
+  if (pcb->pcb_sp == 0)
+    return 0;
+
+  read_memory (pcb->pcb_sp, (char *) &sf, sizeof sf);
+  regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &sf.cr);
+  regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 2, &sf.fixreg2);
+  for (i = 0 ; i < 19 ; i++)
+    regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 13 + i,
+			 &sf.fixreg[i]);
+
+  read_memory(sf.sp, (char *)&cf, sizeof(cf));
+  regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 30, &cf.r30);
+  regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 31, &cf.r31);
+  regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 1, &cf.sp);
+
+  read_memory(cf.sp, (char *)&cf, sizeof(cf));
+  regcache_raw_supply (regcache, tdep->ppc_lr_regnum, &cf.lr);
+  regcache_raw_supply (regcache, PC_REGNUM, &cf.lr);
+
+  return 1;
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_ppcnbsd_nat (void);
+
+void
+_initialize_ppcnbsd_nat (void)
+{
+  /* Support debugging kernel virtual memory images.  */
+  bsd_kvm_add_target (ppcnbsd_supply_pcb);
+}
Index: gdb/Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/Makefile.in,v
retrieving revision 1.605
diff -u -r1.605 Makefile.in
--- gdb/Makefile.in	5 Aug 2004 14:34:16 -0000	1.605
+++ gdb/Makefile.in	5 Aug 2004 18:44:32 -0000
@@ -2281,7 +2281,8 @@
 	$(objfiles_h) $(regcache_h) $(value_h) $(osabi_h) $(regset_h) \
 	$(solib_svr4_h) $(ppc_tdep_h) $(trad_frame_h) $(frame_unwind_h)
 ppcnbsd-nat.o: ppcnbsd-nat.c $(defs_h) $(inferior_h) $(gdb_assert_h) \
-	$(ppc_tdep_h) $(ppcnbsd_tdep_h)
+	$(ppc_tdep_h) $(ppcnbsd_tdep_h) $(gdbcore.h) $(regcache_h) \
+	$(bsd_kvm_h)
 ppcnbsd-tdep.o: ppcnbsd-tdep.c $(defs_h) $(gdbcore_h) $(regcache_h) \
 	$(target_h) $(breakpoint_h) $(value_h) $(osabi_h) $(ppc_tdep_h) \
 	$(ppcnbsd_tdep_h) $(nbsd_tdep_h) $(tramp_frame_h) $(trad_frame_h) \
Index: gdb/config/powerpc/nbsd.mh
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/nbsd.mh,v
retrieving revision 1.11
diff -u -r1.11 nbsd.mh
--- gdb/config/powerpc/nbsd.mh	30 May 2002 01:21:53 -0000	1.11
+++ gdb/config/powerpc/nbsd.mh	5 Aug 2004 18:44:32 -0000
@@ -1,3 +1,5 @@
 # Host: PowerPC, running NetBSD
-NATDEPFILES= fork-child.o infptrace.o inftarg.o ppcnbsd-nat.o
+NATDEPFILES= fork-child.o infptrace.o inftarg.o ppcnbsd-nat.o bsd-kvm.o
 NAT_FILE= nm-nbsd.h
+
+LOADLIBES= -lkvm