Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 329 insertions, 0 deletions

diff --git a/gdb/ultra3-nat.c b/gdb/ultra3-nat.c
new file mode 100644
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--- /dev/null
+++ b/gdb/ultra3-nat.c
@@ -0,0 +1,329 @@
+/* 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.
+
+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
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+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.  */
+
+#define DEBUG
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+#include "symtab.h"
+#include "value.h"
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>  
+
+#include "gdbcore.h"
+
+#include <sys/file.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
+ * supplied as -1.  This may include gr64-gr95 and the protected special
+ * purpose registers.
+ */
+
+void
+fetch_inferior_registers (regno)
+  int regno;
+{
+  register int i,j,ret_val=0;
+  char buf[128];
+
+  if (regno != -1) {
+    fetch_register (regno);
+    return;
+  }
+
+/* Global Registers */
+#ifdef ULTRA3
+  errno = 0;
+  ptrace (PT_READ_STRUCT, inferior_pid,
+	  (PTRACE_ARG3_TYPE) register_addr(GR96_REGNUM,0), 
+	  (int)&pt_struct.pt_gr[0], 32*4);
+  if (errno != 0) {
+      perror_with_name ("reading global registers");
+      ret_val = -1;
+  } else for (regno=GR96_REGNUM, j=0 ; j<32 ; regno++, j++)  {
+      supply_register (regno, &pt_struct.pt_gr[j]);
+  }
+#else
+  for (regno=GR96_REGNUM ; !ret_val && regno < GR96_REGNUM+32 ; regno++)
+    fetch_register(regno);
+#endif
+
+/* Local Registers */
+#ifdef ULTRA3
+  errno = 0;
+  ptrace (PT_READ_STRUCT, inferior_pid,
+	  (PTRACE_ARG3_TYPE) register_addr(LR0_REGNUM,0), 
+	  (int)&pt_struct.pt_lr[0], 128*4);
+  if (errno != 0) {
+      perror_with_name ("reading local registers");
+      ret_val = -1;
+  } else for (regno=LR0_REGNUM, j=0 ; j<128 ; regno++, j++)  {
+      supply_register (regno, &pt_struct.pt_lr[j]);
+  }
+#else
+  for (regno=LR0_REGNUM ; !ret_val && regno < LR0_REGNUM+128 ; regno++)
+    fetch_register(regno);
+#endif
+
+/* Special Registers */
+  fetch_register(GR1_REGNUM);
+  fetch_register(CPS_REGNUM);
+  fetch_register(PC_REGNUM);
+  fetch_register(NPC_REGNUM);
+  fetch_register(PC2_REGNUM);
+  fetch_register(IPC_REGNUM);
+  fetch_register(IPA_REGNUM);
+  fetch_register(IPB_REGNUM);
+  fetch_register(Q_REGNUM);
+  fetch_register(BP_REGNUM);
+  fetch_register(FC_REGNUM);
+
+/* Fake any registers that are in REGISTER_NAMES, but not available to gdb */ 
+  registers_fetched();
+}
+
+/* Store our register values back into the inferior.
+ * If REGNO is -1, do this for all registers.
+ * Otherwise, REGNO specifies which register (so we can save time).  
+ * NOTE: Assumes AMD's binary compatibility standard. 
+ */
+
+void
+store_inferior_registers (regno)
+     int regno;
+{
+  register unsigned int regaddr;
+  char buf[80];
+
+  if (regno >= 0)
+    {
+      if (CANNOT_STORE_REGISTER(regno)) 
+	return;
+      regaddr = register_addr (regno, 0);
+      errno = 0;
+      ptrace (PT_WRITE_U, inferior_pid,
+	      (PTRACE_ARG3_TYPE) regaddr, read_register(regno));
+      if (errno != 0)
+	{
+	  sprintf (buf, "writing register %s (#%d)", REGISTER_NAME (regno), regno);
+	  perror_with_name (buf);
+	}
+    }
+  else
+    {
+#ifdef ULTRA3
+      pt_struct.pt_gr1 = read_register(GR1_REGNUM);
+      for (regno = GR96_REGNUM; regno < GR96_REGNUM+32; regno++)
+	pt_struct.pt_gr[regno] = read_register(regno);
+      for (regno = LR0_REGNUM; regno < LR0_REGNUM+128; regno++)
+	pt_struct.pt_gr[regno] = read_register(regno);
+      errno = 0;
+      ptrace (PT_WRITE_STRUCT, inferior_pid,
+	      (PTRACE_ARG3_TYPE) register_addr(GR1_REGNUM,0), 
+	      (int)&pt_struct.pt_gr1,(1*32*128)*4);
+      if (errno != 0)
+	{
+	   sprintf (buf, "writing all local/global registers");
+	   perror_with_name (buf);
+	}
+      pt_struct.pt_psr = read_register(CPS_REGNUM);
+      pt_struct.pt_pc0 = read_register(NPC_REGNUM);
+      pt_struct.pt_pc1 = read_register(PC_REGNUM);
+      pt_struct.pt_pc2 = read_register(PC2_REGNUM);
+      pt_struct.pt_ipc = read_register(IPC_REGNUM);
+      pt_struct.pt_ipa = read_register(IPA_REGNUM);
+      pt_struct.pt_ipb = read_register(IPB_REGNUM);
+      pt_struct.pt_q   = read_register(Q_REGNUM);
+      pt_struct.pt_bp  = read_register(BP_REGNUM);
+      pt_struct.pt_fc  = read_register(FC_REGNUM);
+      errno = 0;
+      ptrace (PT_WRITE_STRUCT, inferior_pid,
+	      (PTRACE_ARG3_TYPE) register_addr(CPS_REGNUM,0), 
+	      (int)&pt_struct.pt_psr,(10)*4);
+      if (errno != 0)
+	{
+	   sprintf (buf, "writing all special registers");
+	   perror_with_name (buf);
+	   return;
+	}
+#else
+      store_inferior_registers(GR1_REGNUM);
+      for (regno=GR96_REGNUM ; regno<GR96_REGNUM+32 ; regno++)
+	store_inferior_registers(regno);
+      for (regno=LR0_REGNUM ; regno<LR0_REGNUM+128 ; regno++)
+	store_inferior_registers(regno);
+      store_inferior_registers(CPS_REGNUM);
+      store_inferior_registers(PC_REGNUM);
+      store_inferior_registers(NPC_REGNUM);
+      store_inferior_registers(PC2_REGNUM);
+      store_inferior_registers(IPC_REGNUM);
+      store_inferior_registers(IPA_REGNUM);
+      store_inferior_registers(IPB_REGNUM);
+      store_inferior_registers(Q_REGNUM);
+      store_inferior_registers(BP_REGNUM);
+      store_inferior_registers(FC_REGNUM);
+#endif	/* ULTRA3 */
+    }
+}
+
+/* 
+ * Fetch an individual register (and supply it).
+ * return 0 on success, -1 on failure.
+ * NOTE: Assumes AMD's Binary Compatibility Standard for ptrace().
+ */
+static void
+fetch_register (regno)
+     int regno;
+{
+  char buf[128];
+  int	val;
+
+  if (CANNOT_FETCH_REGISTER(regno)) {
+    val = -1;
+    supply_register (regno, &val);
+  } else {
+    errno = 0;
+    val = ptrace (PT_READ_U, inferior_pid,
+		  (PTRACE_ARG3_TYPE) register_addr(regno,0), 0);
+    if (errno != 0) {
+      sprintf(buf,"reading register %s (#%d)",REGISTER_NAME (regno), regno);
+      perror_with_name (buf);
+    } else {
+      supply_register (regno, &val);
+    }
+  }
+}
+
+
+/* 
+ * Read AMD's Binary Compatibilty Standard conforming core file.
+ * struct ptrace_user is the first thing in the core file
+ */
+
+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;
+  char	buf[4];
+
+  for (regno = 0 ; regno < NUM_REGS; regno++) {
+    if (!CANNOT_FETCH_REGISTER(regno)) {
+      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 (REGISTER_NAME (regno)) + 35);
+        strcpy (buffer, "Reading core register ");
+        strcat (buffer, REGISTER_NAME (regno));
+        perror_with_name (buffer);
+      }
+      supply_register (regno, buf);
+    }
+  }
+
+  /* Fake any registers that are in REGISTER_NAMES, but not available to gdb */ 
+  registers_fetched();
+}
+
+
+/*  
+ * 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 */
+    }
+  }
+}
+
+
+/* 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);
+}