-/* Host-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
+/* Native-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
Contributed by David Wood (wood@nyu.edu) at New York University.
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define DEBUG
#include "defs.h"
#include "gdbcore.h"
#include <sys/file.h>
-#include <sys/stat.h>
+#include "gdb_stat.h"
+
+static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));
+
+/* Assumes support for AMD's Binary Compatibility Standard
+ for ptrace(). If you define ULTRA3, the ultra3 extensions to
+ ptrace() are used allowing the reading of more than one register
+ at a time.
+
+ This file assumes KERNEL_DEBUGGING is turned off. This means
+ that if the user/gdb tries to read gr64-gr95 or any of the
+ protected special registers we silently return -1 (see the
+ CANNOT_STORE/FETCH_REGISTER macros). */
+#define ULTRA3
+
+#if !defined (offsetof)
+# define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
+#endif
+
+extern int errno;
+struct ptrace_user pt_struct;
/* Get all available registers from the inferior. Registers that are
* defined in REGISTER_NAMES, but not available to the user/gdb are
(PTRACE_ARG3_TYPE) regaddr, read_register(regno));
if (errno != 0)
{
- sprintf (buf, "writing register %s (#%d)", reg_names[regno],regno);
+ sprintf (buf, "writing register %s (#%d)", REGISTER_NAME (regno), regno);
perror_with_name (buf);
}
}
val = ptrace (PT_READ_U, inferior_pid,
(PTRACE_ARG3_TYPE) register_addr(regno,0), 0);
if (errno != 0) {
- sprintf(buf,"reading register %s (#%d)",reg_names[regno],regno);
+ sprintf(buf,"reading register %s (#%d)",REGISTER_NAME (regno), regno);
perror_with_name (buf);
} else {
supply_register (regno, &val);
* struct ptrace_user is the first thing in the core file
*/
-void
-fetch_core_registers ()
+static void
+fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
+ char *core_reg_sect; /* Unused in this version */
+ unsigned core_reg_size; /* Unused in this version */
+ int which; /* Unused in this version */
+ CORE_ADDR reg_addr; /* Unused in this version */
{
register int regno;
int val;
for (regno = 0 ; regno < NUM_REGS; regno++) {
if (!CANNOT_FETCH_REGISTER(regno)) {
- val = bfd_seek (core_bfd, register_addr (regno, 0), 0);
+ val = bfd_seek (core_bfd, (file_ptr) register_addr (regno, 0), SEEK_SET);
if (val < 0 || (val = bfd_read (buf, sizeof buf, 1, core_bfd)) < 0) {
- char * buffer = (char *) alloca (strlen (reg_names[regno]) + 35);
+ char * buffer = (char *) alloca (strlen (REGISTER_NAME (regno)) + 35);
strcpy (buffer, "Reading core register ");
- strcat (buffer, reg_names[regno]);
+ strcat (buffer, REGISTER_NAME (regno));
perror_with_name (buffer);
}
supply_register (regno, buf);
}
+/*
+ * Takes a register number as defined in tm.h via REGISTER_NAMES, and maps
+ * it to an offset in a struct ptrace_user defined by AMD's BCS.
+ * That is, it defines the mapping between gdb register numbers and items in
+ * a struct ptrace_user.
+ * A register protection scheme is set up here. If a register not
+ * available to the user is specified in 'regno', then an address that
+ * will cause ptrace() to fail is returned.
+ */
+CORE_ADDR
+register_addr (regno,blockend)
+ int regno;
+ CORE_ADDR blockend;
+{
+ if ((regno >= LR0_REGNUM) && (regno < LR0_REGNUM + 128)) {
+ return(offsetof(struct ptrace_user,pt_lr[regno-LR0_REGNUM]));
+ } else if ((regno >= GR96_REGNUM) && (regno < GR96_REGNUM + 32)) {
+ return(offsetof(struct ptrace_user,pt_gr[regno-GR96_REGNUM]));
+ } else {
+ switch (regno) {
+ case GR1_REGNUM: return(offsetof(struct ptrace_user,pt_gr1));
+ case CPS_REGNUM: return(offsetof(struct ptrace_user,pt_psr));
+ case NPC_REGNUM: return(offsetof(struct ptrace_user,pt_pc0));
+ case PC_REGNUM: return(offsetof(struct ptrace_user,pt_pc1));
+ case PC2_REGNUM: return(offsetof(struct ptrace_user,pt_pc2));
+ case IPC_REGNUM: return(offsetof(struct ptrace_user,pt_ipc));
+ case IPA_REGNUM: return(offsetof(struct ptrace_user,pt_ipa));
+ case IPB_REGNUM: return(offsetof(struct ptrace_user,pt_ipb));
+ case Q_REGNUM: return(offsetof(struct ptrace_user,pt_q));
+ case BP_REGNUM: return(offsetof(struct ptrace_user,pt_bp));
+ case FC_REGNUM: return(offsetof(struct ptrace_user,pt_fc));
+ default:
+ fprintf_filtered(gdb_stderr,"register_addr():Bad register %s (%d)\n",
+ REGISTER_NAME (regno), regno);
+ return(0xffffffff); /* Should make ptrace() fail */
+ }
+ }
+}
+
+\f
+/* Register that we are able to handle ultra3 core file formats.
+ FIXME: is this really bfd_target_unknown_flavour? */
+
+static struct core_fns ultra3_core_fns =
+{
+ bfd_target_unknown_flavour,
+ fetch_core_registers,
+ NULL
+};
+
+void
+_initialize_core_ultra3 ()
+{
+ add_core_fns (&ultra3_core_fns);
+}