Gary J's patches to make gdb -w work properly.

Submitted by:	gj

gnu/usr.bin/binutils/gdb/i386/freebsd-nat.c

@@ -17,7 +17,7 @@ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-	$Id: freebsd-nat.c,v 1.3 1994/12/31 17:00:09 bde Exp $
+	$Id: freebsd-nat.c,v 1.1.1.1 1995/04/23 18:35:38 garyj Exp $
 */
 
 #include <sys/types.h>
@@ -344,9 +344,9 @@ extern CORE_ADDR ksym_lookup(const char *);
 kvm_open (efile, cfile, sfile, perm, errout)
 char *efile;
 char *cfile;
-void *sfile;
+char *sfile; /* makes this kvm_open more compatible to the one in libkvm */
 int perm;
-int errout;
+char *errout; /* makes this kvm_open more compatible to the one in libkvm */
 {
 	struct stat stb;
 	CORE_ADDR addr;

gnu/usr.bin/gdb/gdb/defs.h

@@ -434,6 +434,7 @@ enum val_prettyprint
 
 #ifdef KERNEL_DEBUG
 extern int kernel_debugging;
+extern int kernel_writablecore;
 #endif
 
 /* If the xm.h file did not define the mode string used to open the

gnu/usr.bin/gdb/gdb/freebsd-nat.c

@@ -17,7 +17,7 @@ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-	$Id: freebsd-nat.c,v 1.3 1994/12/31 17:00:09 bde Exp $
+	$Id: freebsd-nat.c,v 1.1.1.1 1995/04/23 18:35:38 garyj Exp $
 */
 
 #include <sys/types.h>
@@ -344,9 +344,9 @@ extern CORE_ADDR ksym_lookup(const char *);
 kvm_open (efile, cfile, sfile, perm, errout)
 char *efile;
 char *cfile;
-void *sfile;
+char *sfile; /* makes this kvm_open more compatible to the one in libkvm */
 int perm;
-int errout;
+char *errout; /* makes this kvm_open more compatible to the one in libkvm */
 {
 	struct stat stb;
 	CORE_ADDR addr;

gnu/usr.bin/gdb/gdb/kcorelow.c

@@ -17,7 +17,7 @@ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-	$Id: kcorelow.c,v 1.1 1994/12/30 23:32:56 jkh Exp $
+	$Id: kcorelow.c,v 1.1.1.1 1995/04/23 18:35:48 garyj Exp $
 */
 
 #include "defs.h"
@@ -181,7 +181,7 @@ kcore_open (filename, from_tty)
               error ("kgdb could not open the exec-file, please check the name you used !");
 
 	core_kd = kvm_open (exec_bfd->filename, filename, NULL,
-                          write_files? O_RDWR: O_RDONLY, "kgdb: ");
+                          kernel_writablecore? O_RDWR: O_RDONLY, "kgdb: ");
 	if (core_kd < 0)
 		perror_with_name (filename);
 

gnu/usr.bin/gdb/gdb/main.c

@@ -173,6 +173,8 @@ main (argc, argv)
 #ifdef KERNEL_DEBUG
 	{"kernel", no_argument, &kernel_debugging, 1},
 	{"k", no_argument, &kernel_debugging, 1},
+	{"wcore", no_argument, &kernel_writablecore, 1},
+	{"w", no_argument, &kernel_writablecore, 1},
 #endif
 /* Allow machine descriptions to add more options... */
 #ifdef ADDITIONAL_OPTIONS
@@ -268,6 +270,9 @@ main (argc, argv)
 	  case 'k':
 	    kernel_debugging = 1;
 	    break;
+	  case 'w':
+	    kernel_writablecore = 1;
+	    break;
 #endif
 
 #ifdef ADDITIONAL_OPTION_CASES
@@ -350,6 +355,13 @@ Options:\n\
   --mapped           Use mapped symbol files if supported on this system.\n\
   --readnow          Fully read symbol files on first access.\n\
 ", gdb_stdout);
+#ifdef KERNEL_DEBUG
+      fputs_unfiltered ("\
+  --kernel           Enable kernel debugging.\n\
+  --wcore            Make core file writable (only works for /dev/mem).\n\
+                     This option only works while debugging a kernel !!\n\
+", gdb_stdout);
+#endif /* KERNEL_DEBUGGING */
 #ifdef ADDITIONAL_OPTION_HELP
       fputs_unfiltered (ADDITIONAL_OPTION_HELP, gdb_stdout);
 #endif

gnu/usr.bin/gdb/gdb/top.c

@@ -322,6 +322,7 @@ jmp_buf quit_return;
 #ifdef KERNEL_DEBUG
 /* Non-zero means we are debugging a kernel core file */
 int kernel_debugging = 0;
+int kernel_writablecore = 0;
 #endif
 
 /* Return for reason REASON.  This generally gets back to the command