Obsolete i960.

1 files changed, 1056 insertions, 1056 deletions

diff --git a/gdb/i960-tdep.c b/gdb/i960-tdep.c
index 2b16adf..d059a7b 100644
--- a/gdb/i960-tdep.c
+++ b/gdb/i960-tdep.c
@@ -1,1056 +1,1056 @@
-/* Target-machine dependent code for the Intel 960
-
-   Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000,
-   2001, 2002 Free Software Foundation, Inc.
-
-   Contributed by Intel Corporation.
-   examine_prologue and other parts contributed by Wind River Systems.
-
-   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.  */
-
-#include "defs.h"
-#include "symtab.h"
-#include "value.h"
-#include "frame.h"
-#include "floatformat.h"
-#include "target.h"
-#include "gdbcore.h"
-#include "inferior.h"
-#include "regcache.h"
-#include "gdb_string.h"
-
-static CORE_ADDR next_insn (CORE_ADDR memaddr,
-			    unsigned int *pword1, unsigned int *pword2);
-
-struct type *
-i960_register_type (int regnum)
-{
-  if (regnum < FP0_REGNUM)
-    return builtin_type_int32;
-  else
-    return builtin_type_i960_ext;
-}
-
-
-/* Does the specified function use the "struct returning" convention
-   or the "value returning" convention?  The "value returning" convention
-   almost invariably returns the entire value in registers.  The
-   "struct returning" convention often returns the entire value in
-   memory, and passes a pointer (out of or into the function) saying
-   where the value (is or should go).
-
-   Since this sometimes depends on whether it was compiled with GCC,
-   this is also an argument.  This is used in call_function to build a
-   stack, and in value_being_returned to print return values.
-
-   On i960, a structure is returned in registers g0-g3, if it will fit.
-   If it's more than 16 bytes long, g13 pointed to it on entry.  */
-
-int
-i960_use_struct_convention (int gcc_p, struct type *type)
-{
-  return (TYPE_LENGTH (type) > 16);
-}
-
-/* gdb960 is always running on a non-960 host.  Check its characteristics.
-   This routine must be called as part of gdb initialization.  */
-
-static void
-check_host (void)
-{
-  int i;
-
-  static struct typestruct
-    {
-      int hostsize;		/* Size of type on host         */
-      int i960size;		/* Size of type on i960         */
-      char *typename;		/* Name of type, for error msg  */
-    }
-  types[] =
-  {
-    {
-      sizeof (short), 2, "short"
-    }
-     ,
-    {
-      sizeof (int), 4, "int"
-    }
-     ,
-    {
-      sizeof (long), 4, "long"
-    }
-     ,
-    {
-      sizeof (float), 4, "float"
-    }
-     ,
-    {
-      sizeof (double), 8, "double"
-    }
-     ,
-    {
-      sizeof (char *), 4, "pointer"
-    }
-     ,
-  };
-#define TYPELEN	(sizeof(types) / sizeof(struct typestruct))
-
-  /* Make sure that host type sizes are same as i960
-   */
-  for (i = 0; i < TYPELEN; i++)
-    {
-      if (types[i].hostsize != types[i].i960size)
-	{
-	  printf_unfiltered ("sizeof(%s) != %d:  PROCEED AT YOUR OWN RISK!\n",
-			     types[i].typename, types[i].i960size);
-	}
-
-    }
-}
-
-/* Is this register part of the register window system?  A yes answer
-   implies that 1) The name of this register will not be the same in
-   other frames, and 2) This register is automatically "saved" upon
-   subroutine calls and thus there is no need to search more than one
-   stack frame for it.
-
-   On the i960, in fact, the name of this register in another frame is
-   "mud" -- there is no overlap between the windows.  Each window is
-   simply saved into the stack (true for our purposes, after having been
-   flushed; normally they reside on-chip and are restored from on-chip
-   without ever going to memory).  */
-
-static int
-register_in_window_p (int regnum)
-{
-  return regnum <= R15_REGNUM;
-}
-
-/* i960_find_saved_register ()
-
-   Return the address in which frame FRAME's value of register REGNUM
-   has been saved in memory.  Or return zero if it has not been saved.
-   If REGNUM specifies the SP, the value we return is actually the SP
-   value, not an address where it was saved.  */
-
-static CORE_ADDR
-i960_find_saved_register (struct frame_info *frame, int regnum)
-{
-  register struct frame_info *frame1 = NULL;
-  register CORE_ADDR addr = 0;
-
-  if (frame == NULL)		/* No regs saved if want current frame */
-    return 0;
-
-  /* We assume that a register in a register window will only be saved
-     in one place (since the name changes and/or disappears as you go
-     towards inner frames), so we only call get_frame_saved_regs on
-     the current frame.  This is directly in contradiction to the
-     usage below, which assumes that registers used in a frame must be
-     saved in a lower (more interior) frame.  This change is a result
-     of working on a register window machine; get_frame_saved_regs
-     always returns the registers saved within a frame, within the
-     context (register namespace) of that frame. */
-
-  /* However, note that we don't want this to return anything if
-     nothing is saved (if there's a frame inside of this one).  Also,
-     callers to this routine asking for the stack pointer want the
-     stack pointer saved for *this* frame; this is returned from the
-     next frame.  */
-
-  if (register_in_window_p (regnum))
-    {
-      frame1 = get_next_frame (frame);
-      if (!frame1)
-	return 0;		/* Registers of this frame are active.  */
-
-      /* Get the SP from the next frame in; it will be this
-         current frame.  */
-      if (regnum != SP_REGNUM)
-	frame1 = frame;
-
-      FRAME_INIT_SAVED_REGS (frame1);
-      return frame1->saved_regs[regnum];	/* ... which might be zero */
-    }
-
-  /* Note that this next routine assumes that registers used in
-     frame x will be saved only in the frame that x calls and
-     frames interior to it.  This is not true on the sparc, but the
-     above macro takes care of it, so we should be all right. */
-  while (1)
-    {
-      QUIT;
-      frame1 = get_next_frame (frame);
-      if (frame1 == 0)
-	break;
-      frame = frame1;
-      FRAME_INIT_SAVED_REGS (frame1);
-      if (frame1->saved_regs[regnum])
-	addr = frame1->saved_regs[regnum];
-    }
-
-  return addr;
-}
-
-/* i960_get_saved_register ()
-
-   Find register number REGNUM relative to FRAME and put its (raw,
-   target format) contents in *RAW_BUFFER.  Set *OPTIMIZED if the
-   variable was optimized out (and thus can't be fetched).  Set *LVAL
-   to lval_memory, lval_register, or not_lval, depending on whether
-   the value was fetched from memory, from a register, or in a strange
-   and non-modifiable way (e.g. a frame pointer which was calculated
-   rather than fetched).  Set *ADDRP to the address, either in memory
-   on as a REGISTER_BYTE offset into the registers array.
-
-   Note that this implementation never sets *LVAL to not_lval.  But it
-   can be replaced by defining GET_SAVED_REGISTER and supplying your
-   own.
-
-   The argument RAW_BUFFER must point to aligned memory.  */
-
-void
-i960_get_saved_register (char *raw_buffer,
-			 int *optimized,
-			 CORE_ADDR *addrp,
-			 struct frame_info *frame,
-			 int regnum,
-			 enum lval_type *lval)
-{
-  CORE_ADDR addr;
-
-  if (!target_has_registers)
-    error ("No registers.");
-
-  /* Normal systems don't optimize out things with register numbers.  */
-  if (optimized != NULL)
-    *optimized = 0;
-  addr = i960_find_saved_register (frame, regnum);
-  if (addr != 0)
-    {
-      if (lval != NULL)
-	*lval = lval_memory;
-      if (regnum == SP_REGNUM)
-	{
-	  if (raw_buffer != NULL)
-	    {
-	      /* Put it back in target format.  */
-	      store_address (raw_buffer, REGISTER_RAW_SIZE (regnum),
-			     (LONGEST) addr);
-	    }
-	  if (addrp != NULL)
-	    *addrp = 0;
-	  return;
-	}
-      if (raw_buffer != NULL)
-	target_read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
-    }
-  else
-    {
-      if (lval != NULL)
-	*lval = lval_register;
-      addr = REGISTER_BYTE (regnum);
-      if (raw_buffer != NULL)
-	read_register_gen (regnum, raw_buffer);
-    }
-  if (addrp != NULL)
-    *addrp = addr;
-}
-
-/* Examine an i960 function prologue, recording the addresses at which
-   registers are saved explicitly by the prologue code, and returning
-   the address of the first instruction after the prologue (but not
-   after the instruction at address LIMIT, as explained below).
-
-   LIMIT places an upper bound on addresses of the instructions to be
-   examined.  If the prologue code scan reaches LIMIT, the scan is
-   aborted and LIMIT is returned.  This is used, when examining the
-   prologue for the current frame, to keep examine_prologue () from
-   claiming that a given register has been saved when in fact the
-   instruction that saves it has not yet been executed.  LIMIT is used
-   at other times to stop the scan when we hit code after the true
-   function prologue (e.g. for the first source line) which might
-   otherwise be mistaken for function prologue.
-
-   The format of the function prologue matched by this routine is
-   derived from examination of the source to gcc960 1.21, particularly
-   the routine i960_function_prologue ().  A "regular expression" for
-   the function prologue is given below:
-
-   (lda LRn, g14
-   mov g14, g[0-7]
-   (mov 0, g14) | (lda 0, g14))?
-
-   (mov[qtl]? g[0-15], r[4-15])*
-   ((addo [1-31], sp, sp) | (lda n(sp), sp))?
-   (st[qtl]? g[0-15], n(fp))*
-
-   (cmpobne 0, g14, LFn
-   mov sp, g14
-   lda 0x30(sp), sp
-   LFn: stq g0, (g14)
-   stq g4, 0x10(g14)
-   stq g8, 0x20(g14))?
-
-   (st g14, n(fp))?
-   (mov g13,r[4-15])?
- */
-
-/* Macros for extracting fields from i960 instructions.  */
-
-#define BITMASK(pos, width) (((0x1 << (width)) - 1) << (pos))
-#define EXTRACT_FIELD(val, pos, width) ((val) >> (pos) & BITMASK (0, width))
-
-#define REG_SRC1(insn)    EXTRACT_FIELD (insn, 0, 5)
-#define REG_SRC2(insn)    EXTRACT_FIELD (insn, 14, 5)
-#define REG_SRCDST(insn)  EXTRACT_FIELD (insn, 19, 5)
-#define MEM_SRCDST(insn)  EXTRACT_FIELD (insn, 19, 5)
-#define MEMA_OFFSET(insn) EXTRACT_FIELD (insn, 0, 12)
-
-/* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or
-   is not the address of a valid instruction, the address of the next
-   instruction beyond ADDR otherwise.  *PWORD1 receives the first word
-   of the instruction, and (for two-word instructions), *PWORD2 receives
-   the second.  */
-
-#define NEXT_PROLOGUE_INSN(addr, lim, pword1, pword2) \
-  (((addr) < (lim)) ? next_insn (addr, pword1, pword2) : 0)
-
-static CORE_ADDR
-examine_prologue (register CORE_ADDR ip, register CORE_ADDR limit,
-		  CORE_ADDR frame_addr, struct frame_saved_regs *fsr)
-{
-  register CORE_ADDR next_ip;
-  register int src, dst;
-  register unsigned int *pcode;
-  unsigned int insn1, insn2;
-  int size;
-  int within_leaf_prologue;
-  CORE_ADDR save_addr;
-  static unsigned int varargs_prologue_code[] =
-  {
-    0x3507a00c,			/* cmpobne 0x0, g14, LFn */
-    0x5cf01601,			/* mov sp, g14           */
-    0x8c086030,			/* lda 0x30(sp), sp      */
-    0xb2879000,			/* LFn: stq  g0, (g14)   */
-    0xb2a7a010,			/* stq g4, 0x10(g14)     */
-    0xb2c7a020			/* stq g8, 0x20(g14)     */
-  };
-
-  /* Accept a leaf procedure prologue code fragment if present.
-     Note that ip might point to either the leaf or non-leaf
-     entry point; we look for the non-leaf entry point first:  */
-
-  within_leaf_prologue = 0;
-  if ((next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2))
-      && ((insn1 & 0xfffff000) == 0x8cf00000	/* lda LRx, g14 (MEMA) */
-	  || (insn1 & 0xfffffc60) == 0x8cf03000))	/* lda LRx, g14 (MEMB) */
-    {
-      within_leaf_prologue = 1;
-      next_ip = NEXT_PROLOGUE_INSN (next_ip, limit, &insn1, &insn2);
-    }
-
-  /* Now look for the prologue code at a leaf entry point:  */
-
-  if (next_ip
-      && (insn1 & 0xff87ffff) == 0x5c80161e	/* mov g14, gx */
-      && REG_SRCDST (insn1) <= G0_REGNUM + 7)
-    {
-      within_leaf_prologue = 1;
-      if ((next_ip = NEXT_PROLOGUE_INSN (next_ip, limit, &insn1, &insn2))
-	  && (insn1 == 0x8cf00000	/* lda 0, g14 */
-	      || insn1 == 0x5cf01e00))	/* mov 0, g14 */
-	{
-	  ip = next_ip;
-	  next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
-	  within_leaf_prologue = 0;
-	}
-    }
-
-  /* If something that looks like the beginning of a leaf prologue
-     has been seen, but the remainder of the prologue is missing, bail.
-     We don't know what we've got.  */
-
-  if (within_leaf_prologue)
-    return (ip);
-
-  /* Accept zero or more instances of "mov[qtl]? gx, ry", where y >= 4.
-     This may cause us to mistake the moving of a register
-     parameter to a local register for the saving of a callee-saved
-     register, but that can't be helped, since with the
-     "-fcall-saved" flag, any register can be made callee-saved.  */
-
-  while (next_ip
-	 && (insn1 & 0xfc802fb0) == 0x5c000610
-	 && (dst = REG_SRCDST (insn1)) >= (R0_REGNUM + 4))
-    {
-      src = REG_SRC1 (insn1);
-      size = EXTRACT_FIELD (insn1, 24, 2) + 1;
-      save_addr = frame_addr + ((dst - R0_REGNUM) * 4);
-      while (size--)
-	{
-	  fsr->regs[src++] = save_addr;
-	  save_addr += 4;
-	}
-      ip = next_ip;
-      next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
-    }
-
-  /* Accept an optional "addo n, sp, sp" or "lda n(sp), sp".  */
-
-  if (next_ip &&
-      ((insn1 & 0xffffffe0) == 0x59084800	/* addo n, sp, sp */
-       || (insn1 & 0xfffff000) == 0x8c086000	/* lda n(sp), sp (MEMA) */
-       || (insn1 & 0xfffffc60) == 0x8c087400))	/* lda n(sp), sp (MEMB) */
-    {
-      ip = next_ip;
-      next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
-    }
-
-  /* Accept zero or more instances of "st[qtl]? gx, n(fp)".  
-     This may cause us to mistake the copying of a register
-     parameter to the frame for the saving of a callee-saved
-     register, but that can't be helped, since with the
-     "-fcall-saved" flag, any register can be made callee-saved.
-     We can, however, refuse to accept a save of register g14,
-     since that is matched explicitly below.  */
-
-  while (next_ip &&
-	 ((insn1 & 0xf787f000) == 0x9287e000	/* stl? gx, n(fp) (MEMA) */
-	  || (insn1 & 0xf787fc60) == 0x9287f400		/* stl? gx, n(fp) (MEMB) */
-	  || (insn1 & 0xef87f000) == 0xa287e000		/* st[tq] gx, n(fp) (MEMA) */
-	  || (insn1 & 0xef87fc60) == 0xa287f400)	/* st[tq] gx, n(fp) (MEMB) */
-	 && ((src = MEM_SRCDST (insn1)) != G14_REGNUM))
-    {
-      save_addr = frame_addr + ((insn1 & BITMASK (12, 1))
-				? insn2 : MEMA_OFFSET (insn1));
-      size = (insn1 & BITMASK (29, 1)) ? ((insn1 & BITMASK (28, 1)) ? 4 : 3)
-	: ((insn1 & BITMASK (27, 1)) ? 2 : 1);
-      while (size--)
-	{
-	  fsr->regs[src++] = save_addr;
-	  save_addr += 4;
-	}
-      ip = next_ip;
-      next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
-    }
-
-  /* Accept the varargs prologue code if present.  */
-
-  size = sizeof (varargs_prologue_code) / sizeof (int);
-  pcode = varargs_prologue_code;
-  while (size-- && next_ip && *pcode++ == insn1)
-    {
-      ip = next_ip;
-      next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
-    }
-
-  /* Accept an optional "st g14, n(fp)".  */
-
-  if (next_ip &&
-      ((insn1 & 0xfffff000) == 0x92f7e000	/* st g14, n(fp) (MEMA) */
-       || (insn1 & 0xfffffc60) == 0x92f7f400))	/* st g14, n(fp) (MEMB) */
-    {
-      fsr->regs[G14_REGNUM] = frame_addr + ((insn1 & BITMASK (12, 1))
-					    ? insn2 : MEMA_OFFSET (insn1));
-      ip = next_ip;
-      next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
-    }
-
-  /* Accept zero or one instance of "mov g13, ry", where y >= 4.
-     This is saving the address where a struct should be returned.  */
-
-  if (next_ip
-      && (insn1 & 0xff802fbf) == 0x5c00061d
-      && (dst = REG_SRCDST (insn1)) >= (R0_REGNUM + 4))
-    {
-      save_addr = frame_addr + ((dst - R0_REGNUM) * 4);
-      fsr->regs[G0_REGNUM + 13] = save_addr;
-      ip = next_ip;
-#if 0				/* We'll need this once there is a subsequent instruction examined. */
-      next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
-#endif
-    }
-
-  return (ip);
-}
-
-/* Given an ip value corresponding to the start of a function,
-   return the ip of the first instruction after the function 
-   prologue.  */
-
-CORE_ADDR
-i960_skip_prologue (CORE_ADDR ip)
-{
-  struct frame_saved_regs saved_regs_dummy;
-  struct symtab_and_line sal;
-  CORE_ADDR limit;
-
-  sal = find_pc_line (ip, 0);
-  limit = (sal.end) ? sal.end : 0xffffffff;
-
-  return (examine_prologue (ip, limit, (CORE_ADDR) 0, &saved_regs_dummy));
-}
-
-/* Put here the code to store, into a struct frame_saved_regs,
-   the addresses of the saved registers of frame described by FRAME_INFO.
-   This includes special registers such as pc and fp saved in special
-   ways in the stack frame.  sp is even more special:
-   the address we return for it IS the sp for the next frame.
-
-   We cache the result of doing this in the frame_obstack, since it is
-   fairly expensive.  */
-
-void
-frame_find_saved_regs (struct frame_info *fi, struct frame_saved_regs *fsr)
-{
-  register CORE_ADDR next_addr;
-  register CORE_ADDR *saved_regs;
-  register int regnum;
-  register struct frame_saved_regs *cache_fsr;
-  CORE_ADDR ip;
-  struct symtab_and_line sal;
-  CORE_ADDR limit;
-
-  if (!fi->fsr)
-    {
-      cache_fsr = (struct frame_saved_regs *)
-	frame_obstack_alloc (sizeof (struct frame_saved_regs));
-      memset (cache_fsr, '\0', sizeof (struct frame_saved_regs));
-      fi->fsr = cache_fsr;
-
-      /* Find the start and end of the function prologue.  If the PC
-         is in the function prologue, we only consider the part that
-         has executed already.  */
-
-      ip = get_pc_function_start (fi->pc);
-      sal = find_pc_line (ip, 0);
-      limit = (sal.end && sal.end < fi->pc) ? sal.end : fi->pc;
-
-      examine_prologue (ip, limit, fi->frame, cache_fsr);
-
-      /* Record the addresses at which the local registers are saved.
-         Strictly speaking, we should only do this for non-leaf procedures,
-         but no one will ever look at these values if it is a leaf procedure,
-         since local registers are always caller-saved.  */
-
-      next_addr = (CORE_ADDR) fi->frame;
-      saved_regs = cache_fsr->regs;
-      for (regnum = R0_REGNUM; regnum <= R15_REGNUM; regnum++)
-	{
-	  *saved_regs++ = next_addr;
-	  next_addr += 4;
-	}
-
-      cache_fsr->regs[FP_REGNUM] = cache_fsr->regs[PFP_REGNUM];
-    }
-
-  *fsr = *fi->fsr;
-
-  /* Fetch the value of the sp from memory every time, since it
-     is conceivable that it has changed since the cache was flushed.  
-     This unfortunately undoes much of the savings from caching the 
-     saved register values.  I suggest adding an argument to 
-     get_frame_saved_regs () specifying the register number we're
-     interested in (or -1 for all registers).  This would be passed
-     through to FRAME_FIND_SAVED_REGS (), permitting more efficient
-     computation of saved register addresses (e.g., on the i960,
-     we don't have to examine the prologue to find local registers). 
-     -- markf@wrs.com 
-     FIXME, we don't need to refetch this, since the cache is cleared
-     every time the child process is restarted.  If GDB itself
-     modifies SP, it has to clear the cache by hand (does it?).  -gnu */
-
-  fsr->regs[SP_REGNUM] = read_memory_integer (fsr->regs[SP_REGNUM], 4);
-}
-
-/* Return the address of the argument block for the frame
-   described by FI.  Returns 0 if the address is unknown.  */
-
-CORE_ADDR
-frame_args_address (struct frame_info *fi, int must_be_correct)
-{
-  struct frame_saved_regs fsr;
-  CORE_ADDR ap;
-
-  /* If g14 was saved in the frame by the function prologue code, return
-     the saved value.  If the frame is current and we are being sloppy,
-     return the value of g14.  Otherwise, return zero.  */
-
-  get_frame_saved_regs (fi, &fsr);
-  if (fsr.regs[G14_REGNUM])
-    ap = read_memory_integer (fsr.regs[G14_REGNUM], 4);
-  else
-    {
-      if (must_be_correct)
-	return 0;		/* Don't cache this result */
-      if (get_next_frame (fi))
-	ap = 0;
-      else
-	ap = read_register (G14_REGNUM);
-      if (ap == 0)
-	ap = fi->frame;
-    }
-  fi->arg_pointer = ap;		/* Cache it for next time */
-  return ap;
-}
-
-/* Return the address of the return struct for the frame
-   described by FI.  Returns 0 if the address is unknown.  */
-
-CORE_ADDR
-frame_struct_result_address (struct frame_info *fi)
-{
-  struct frame_saved_regs fsr;
-  CORE_ADDR ap;
-
-  /* If the frame is non-current, check to see if g14 was saved in the
-     frame by the function prologue code; return the saved value if so,
-     zero otherwise.  If the frame is current, return the value of g14.
-
-     FIXME, shouldn't this use the saved value as long as we are past
-     the function prologue, and only use the current value if we have
-     no saved value and are at TOS?   -- gnu@cygnus.com */
-
-  if (get_next_frame (fi))
-    {
-      get_frame_saved_regs (fi, &fsr);
-      if (fsr.regs[G13_REGNUM])
-	ap = read_memory_integer (fsr.regs[G13_REGNUM], 4);
-      else
-	ap = 0;
-    }
-  else
-    ap = read_register (G13_REGNUM);
-
-  return ap;
-}
-
-/* Return address to which the currently executing leafproc will return,
-   or 0 if IP, the value of the instruction pointer from the currently
-   executing function, is not in a leafproc (or if we can't tell if it
-   is).
-
-   Do this by finding the starting address of the routine in which IP lies.
-   If the instruction there is "mov g14, gx" (where x is in [0,7]), this
-   is a leafproc and the return address is in register gx.  Well, this is
-   true unless the return address points at a RET instruction in the current
-   procedure, which indicates that we have a 'dual entry' routine that
-   has been entered through the CALL entry point.  */
-
-CORE_ADDR
-leafproc_return (CORE_ADDR ip)
-{
-  register struct minimal_symbol *msymbol;
-  char *p;
-  int dst;
-  unsigned int insn1, insn2;
-  CORE_ADDR return_addr;
-
-  if ((msymbol = lookup_minimal_symbol_by_pc (ip)) != NULL)
-    {
-      if ((p = strchr (SYMBOL_NAME (msymbol), '.')) && STREQ (p, ".lf"))
-	{
-	  if (next_insn (SYMBOL_VALUE_ADDRESS (msymbol), &insn1, &insn2)
-	      && (insn1 & 0xff87ffff) == 0x5c80161e	/* mov g14, gx */
-	      && (dst = REG_SRCDST (insn1)) <= G0_REGNUM + 7)
-	    {
-	      /* Get the return address.  If the "mov g14, gx" 
-	         instruction hasn't been executed yet, read
-	         the return address from g14; otherwise, read it
-	         from the register into which g14 was moved.  */
-
-	      return_addr =
-		read_register ((ip == SYMBOL_VALUE_ADDRESS (msymbol))
-			       ? G14_REGNUM : dst);
-
-	      /* We know we are in a leaf procedure, but we don't know
-	         whether the caller actually did a "bal" to the ".lf"
-	         entry point, or a normal "call" to the non-leaf entry
-	         point one instruction before.  In the latter case, the
-	         return address will be the address of a "ret"
-	         instruction within the procedure itself.  We test for
-	         this below.  */
-
-	      if (!next_insn (return_addr, &insn1, &insn2)
-		  || (insn1 & 0xff000000) != 0xa000000	/* ret */
-		  || lookup_minimal_symbol_by_pc (return_addr) != msymbol)
-		return (return_addr);
-	    }
-	}
-    }
-
-  return (0);
-}
-
-/* Immediately after a function call, return the saved pc.
-   Can't go through the frames for this because on some machines
-   the new frame is not set up until the new function executes
-   some instructions. 
-   On the i960, the frame *is* set up immediately after the call,
-   unless the function is a leaf procedure.  */
-
-CORE_ADDR
-saved_pc_after_call (struct frame_info *frame)
-{
-  CORE_ADDR saved_pc;
-
-  saved_pc = leafproc_return (get_frame_pc (frame));
-  if (!saved_pc)
-    saved_pc = FRAME_SAVED_PC (frame);
-
-  return saved_pc;
-}
-
-/* Discard from the stack the innermost frame,
-   restoring all saved registers.  */
-
-void
-i960_pop_frame (void)
-{
-  register struct frame_info *current_fi, *prev_fi;
-  register int i;
-  CORE_ADDR save_addr;
-  CORE_ADDR leaf_return_addr;
-  struct frame_saved_regs fsr;
-  char local_regs_buf[16 * 4];
-
-  current_fi = get_current_frame ();
-
-  /* First, undo what the hardware does when we return.
-     If this is a non-leaf procedure, restore local registers from
-     the save area in the calling frame.  Otherwise, load the return
-     address obtained from leafproc_return () into the rip.  */
-
-  leaf_return_addr = leafproc_return (current_fi->pc);
-  if (!leaf_return_addr)
-    {
-      /* Non-leaf procedure.  Restore local registers, incl IP.  */
-      prev_fi = get_prev_frame (current_fi);
-      read_memory (prev_fi->frame, local_regs_buf, sizeof (local_regs_buf));
-      write_register_bytes (REGISTER_BYTE (R0_REGNUM), local_regs_buf,
-			    sizeof (local_regs_buf));
-
-      /* Restore frame pointer.  */
-      write_register (FP_REGNUM, prev_fi->frame);
-    }
-  else
-    {
-      /* Leaf procedure.  Just restore the return address into the IP.  */
-      write_register (RIP_REGNUM, leaf_return_addr);
-    }
-
-  /* Now restore any global regs that the current function had saved. */
-  get_frame_saved_regs (current_fi, &fsr);
-  for (i = G0_REGNUM; i < G14_REGNUM; i++)
-    {
-      save_addr = fsr.regs[i];
-      if (save_addr != 0)
-	write_register (i, read_memory_integer (save_addr, 4));
-    }
-
-  /* Flush the frame cache, create a frame for the new innermost frame,
-     and make it the current frame.  */
-
-  flush_cached_frames ();
-}
-
-/* Given a 960 stop code (fault or trace), return the signal which
-   corresponds.  */
-
-enum target_signal
-i960_fault_to_signal (int fault)
-{
-  switch (fault)
-    {
-    case 0:
-      return TARGET_SIGNAL_BUS;	/* parallel fault */
-    case 1:
-      return TARGET_SIGNAL_UNKNOWN;
-    case 2:
-      return TARGET_SIGNAL_ILL;	/* operation fault */
-    case 3:
-      return TARGET_SIGNAL_FPE;	/* arithmetic fault */
-    case 4:
-      return TARGET_SIGNAL_FPE;	/* floating point fault */
-
-      /* constraint fault.  This appears not to distinguish between
-         a range constraint fault (which should be SIGFPE) and a privileged
-         fault (which should be SIGILL).  */
-    case 5:
-      return TARGET_SIGNAL_ILL;
-
-    case 6:
-      return TARGET_SIGNAL_SEGV;	/* virtual memory fault */
-
-      /* protection fault.  This is for an out-of-range argument to
-         "calls".  I guess it also could be SIGILL. */
-    case 7:
-      return TARGET_SIGNAL_SEGV;
-
-    case 8:
-      return TARGET_SIGNAL_BUS;	/* machine fault */
-    case 9:
-      return TARGET_SIGNAL_BUS;	/* structural fault */
-    case 0xa:
-      return TARGET_SIGNAL_ILL;	/* type fault */
-    case 0xb:
-      return TARGET_SIGNAL_UNKNOWN;	/* reserved fault */
-    case 0xc:
-      return TARGET_SIGNAL_BUS;	/* process fault */
-    case 0xd:
-      return TARGET_SIGNAL_SEGV;	/* descriptor fault */
-    case 0xe:
-      return TARGET_SIGNAL_BUS;	/* event fault */
-    case 0xf:
-      return TARGET_SIGNAL_UNKNOWN;	/* reserved fault */
-    case 0x10:
-      return TARGET_SIGNAL_TRAP;	/* single-step trace */
-    case 0x11:
-      return TARGET_SIGNAL_TRAP;	/* branch trace */
-    case 0x12:
-      return TARGET_SIGNAL_TRAP;	/* call trace */
-    case 0x13:
-      return TARGET_SIGNAL_TRAP;	/* return trace */
-    case 0x14:
-      return TARGET_SIGNAL_TRAP;	/* pre-return trace */
-    case 0x15:
-      return TARGET_SIGNAL_TRAP;	/* supervisor call trace */
-    case 0x16:
-      return TARGET_SIGNAL_TRAP;	/* breakpoint trace */
-    default:
-      return TARGET_SIGNAL_UNKNOWN;
-    }
-}
-
-/****************************************/
-/* MEM format                           */
-/****************************************/
-
-struct tabent
-{
-  char *name;
-  char numops;
-};
-
-/* Return instruction length, either 4 or 8.  When NOPRINT is non-zero
-   (TRUE), don't output any text.  (Actually, as implemented, if NOPRINT
-   is 0, abort() is called.) */
-
-static int
-mem (unsigned long memaddr, unsigned long word1, unsigned long word2,
-     int noprint)
-{
-  int i, j;
-  int len;
-  int mode;
-  int offset;
-  const char *reg1, *reg2, *reg3;
-
-  /* This lookup table is too sparse to make it worth typing in, but not
-   * so large as to make a sparse array necessary.  We allocate the
-   * table at runtime, initialize all entries to empty, and copy the
-   * real ones in from an initialization table.
-   *
-   * NOTE: In this table, the meaning of 'numops' is:
-   *       1: single operand
-   *       2: 2 operands, load instruction
-   *      -2: 2 operands, store instruction
-   */
-  static struct tabent *mem_tab = NULL;
-/* Opcodes of 0x8X, 9X, aX, bX, and cX must be in the table.  */
-#define MEM_MIN	0x80
-#define MEM_MAX	0xcf
-#define MEM_SIZ	((MEM_MAX-MEM_MIN+1) * sizeof(struct tabent))
-
-  static struct
-    {
-      int opcode;
-      char *name;
-      char numops;
-    }
-  mem_init[] =
-  {
-    0x80, "ldob", 2,
-      0x82, "stob", -2,
-      0x84, "bx", 1,
-      0x85, "balx", 2,
-      0x86, "callx", 1,
-      0x88, "ldos", 2,
-      0x8a, "stos", -2,
-      0x8c, "lda", 2,
-      0x90, "ld", 2,
-      0x92, "st", -2,
-      0x98, "ldl", 2,
-      0x9a, "stl", -2,
-      0xa0, "ldt", 2,
-      0xa2, "stt", -2,
-      0xb0, "ldq", 2,
-      0xb2, "stq", -2,
-      0xc0, "ldib", 2,
-      0xc2, "stib", -2,
-      0xc8, "ldis", 2,
-      0xca, "stis", -2,
-      0, NULL, 0
-  };
-
-  if (mem_tab == NULL)
-    {
-      mem_tab = (struct tabent *) xmalloc (MEM_SIZ);
-      memset (mem_tab, '\0', MEM_SIZ);
-      for (i = 0; mem_init[i].opcode != 0; i++)
-	{
-	  j = mem_init[i].opcode - MEM_MIN;
-	  mem_tab[j].name = mem_init[i].name;
-	  mem_tab[j].numops = mem_init[i].numops;
-	}
-    }
-
-  i = ((word1 >> 24) & 0xff) - MEM_MIN;
-  mode = (word1 >> 10) & 0xf;
-
-  if ((mem_tab[i].name != NULL)	/* Valid instruction */
-      && ((mode == 5) || (mode >= 12)))
-    {				/* With 32-bit displacement */
-      len = 8;
-    }
-  else
-    {
-      len = 4;
-    }
-
-  if (noprint)
-    {
-      return len;
-    }
-  internal_error (__FILE__, __LINE__, "failed internal consistency check");
-}
-
-/* Read the i960 instruction at 'memaddr' and return the address of 
-   the next instruction after that, or 0 if 'memaddr' is not the
-   address of a valid instruction.  The first word of the instruction
-   is stored at 'pword1', and the second word, if any, is stored at
-   'pword2'.  */
-
-static CORE_ADDR
-next_insn (CORE_ADDR memaddr, unsigned int *pword1, unsigned int *pword2)
-{
-  int len;
-  char buf[8];
-
-  /* Read the two (potential) words of the instruction at once,
-     to eliminate the overhead of two calls to read_memory ().
-     FIXME: Loses if the first one is readable but the second is not
-     (e.g. last word of the segment).  */
-
-  read_memory (memaddr, buf, 8);
-  *pword1 = extract_unsigned_integer (buf, 4);
-  *pword2 = extract_unsigned_integer (buf + 4, 4);
-
-  /* Divide instruction set into classes based on high 4 bits of opcode */
-
-  switch ((*pword1 >> 28) & 0xf)
-    {
-    case 0x0:
-    case 0x1:			/* ctrl */
-
-    case 0x2:
-    case 0x3:			/* cobr */
-
-    case 0x5:
-    case 0x6:
-    case 0x7:			/* reg */
-      len = 4;
-      break;
-
-    case 0x8:
-    case 0x9:
-    case 0xa:
-    case 0xb:
-    case 0xc:
-      len = mem (memaddr, *pword1, *pword2, 1);
-      break;
-
-    default:			/* invalid instruction */
-      len = 0;
-      break;
-    }
-
-  if (len)
-    return memaddr + len;
-  else
-    return 0;
-}
-
-/* 'start_frame' is a variable in the MON960 runtime startup routine
-   that contains the frame pointer of the 'start' routine (the routine
-   that calls 'main').  By reading its contents out of remote memory,
-   we can tell where the frame chain ends:  backtraces should halt before
-   they display this frame.  */
-
-int
-mon960_frame_chain_valid (CORE_ADDR chain, struct frame_info *curframe)
-{
-  struct symbol *sym;
-  struct minimal_symbol *msymbol;
-
-  /* crtmon960.o is an assembler module that is assumed to be linked
-   * first in an i80960 executable.  It contains the true entry point;
-   * it performs startup up initialization and then calls 'main'.
-   *
-   * 'sf' is the name of a variable in crtmon960.o that is set
-   *      during startup to the address of the first frame.
-   *
-   * 'a' is the address of that variable in 80960 memory.
-   */
-  static char sf[] = "start_frame";
-  CORE_ADDR a;
-
-
-  chain &= ~0x3f;		/* Zero low 6 bits because previous frame pointers
-				   contain return status info in them.  */
-  if (chain == 0)
-    {
-      return 0;
-    }
-
-  sym = lookup_symbol (sf, 0, VAR_NAMESPACE, (int *) NULL,
-		       (struct symtab **) NULL);
-  if (sym != 0)
-    {
-      a = SYMBOL_VALUE (sym);
-    }
-  else
-    {
-      msymbol = lookup_minimal_symbol (sf, NULL, NULL);
-      if (msymbol == NULL)
-	return 0;
-      a = SYMBOL_VALUE_ADDRESS (msymbol);
-    }
-
-  return (chain != read_memory_integer (a, 4));
-}
-
-
-void
-_initialize_i960_tdep (void)
-{
-  check_host ();
-
-  tm_print_insn = print_insn_i960;
-}
+// OBSOLETE /* Target-machine dependent code for the Intel 960
+// OBSOLETE 
+// OBSOLETE    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000,
+// OBSOLETE    2001, 2002 Free Software Foundation, Inc.
+// OBSOLETE 
+// OBSOLETE    Contributed by Intel Corporation.
+// OBSOLETE    examine_prologue and other parts contributed by Wind River Systems.
+// OBSOLETE 
+// OBSOLETE    This file is part of GDB.
+// OBSOLETE 
+// OBSOLETE    This program is free software; you can redistribute it and/or modify
+// OBSOLETE    it under the terms of the GNU General Public License as published by
+// OBSOLETE    the Free Software Foundation; either version 2 of the License, or
+// OBSOLETE    (at your option) any later version.
+// OBSOLETE 
+// OBSOLETE    This program is distributed in the hope that it will be useful,
+// OBSOLETE    but WITHOUT ANY WARRANTY; without even the implied warranty of
+// OBSOLETE    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// OBSOLETE    GNU General Public License for more details.
+// OBSOLETE 
+// OBSOLETE    You should have received a copy of the GNU General Public License
+// OBSOLETE    along with this program; if not, write to the Free Software
+// OBSOLETE    Foundation, Inc., 59 Temple Place - Suite 330,
+// OBSOLETE    Boston, MA 02111-1307, USA.  */
+// OBSOLETE 
+// OBSOLETE #include "defs.h"
+// OBSOLETE #include "symtab.h"
+// OBSOLETE #include "value.h"
+// OBSOLETE #include "frame.h"
+// OBSOLETE #include "floatformat.h"
+// OBSOLETE #include "target.h"
+// OBSOLETE #include "gdbcore.h"
+// OBSOLETE #include "inferior.h"
+// OBSOLETE #include "regcache.h"
+// OBSOLETE #include "gdb_string.h"
+// OBSOLETE 
+// OBSOLETE static CORE_ADDR next_insn (CORE_ADDR memaddr,
+// OBSOLETE 			    unsigned int *pword1, unsigned int *pword2);
+// OBSOLETE 
+// OBSOLETE struct type *
+// OBSOLETE i960_register_type (int regnum)
+// OBSOLETE {
+// OBSOLETE   if (regnum < FP0_REGNUM)
+// OBSOLETE     return builtin_type_int32;
+// OBSOLETE   else
+// OBSOLETE     return builtin_type_i960_ext;
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE 
+// OBSOLETE /* Does the specified function use the "struct returning" convention
+// OBSOLETE    or the "value returning" convention?  The "value returning" convention
+// OBSOLETE    almost invariably returns the entire value in registers.  The
+// OBSOLETE    "struct returning" convention often returns the entire value in
+// OBSOLETE    memory, and passes a pointer (out of or into the function) saying
+// OBSOLETE    where the value (is or should go).
+// OBSOLETE 
+// OBSOLETE    Since this sometimes depends on whether it was compiled with GCC,
+// OBSOLETE    this is also an argument.  This is used in call_function to build a
+// OBSOLETE    stack, and in value_being_returned to print return values.
+// OBSOLETE 
+// OBSOLETE    On i960, a structure is returned in registers g0-g3, if it will fit.
+// OBSOLETE    If it's more than 16 bytes long, g13 pointed to it on entry.  */
+// OBSOLETE 
+// OBSOLETE int
+// OBSOLETE i960_use_struct_convention (int gcc_p, struct type *type)
+// OBSOLETE {
+// OBSOLETE   return (TYPE_LENGTH (type) > 16);
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* gdb960 is always running on a non-960 host.  Check its characteristics.
+// OBSOLETE    This routine must be called as part of gdb initialization.  */
+// OBSOLETE 
+// OBSOLETE static void
+// OBSOLETE check_host (void)
+// OBSOLETE {
+// OBSOLETE   int i;
+// OBSOLETE 
+// OBSOLETE   static struct typestruct
+// OBSOLETE     {
+// OBSOLETE       int hostsize;		/* Size of type on host         */
+// OBSOLETE       int i960size;		/* Size of type on i960         */
+// OBSOLETE       char *typename;		/* Name of type, for error msg  */
+// OBSOLETE     }
+// OBSOLETE   types[] =
+// OBSOLETE   {
+// OBSOLETE     {
+// OBSOLETE       sizeof (short), 2, "short"
+// OBSOLETE     }
+// OBSOLETE      ,
+// OBSOLETE     {
+// OBSOLETE       sizeof (int), 4, "int"
+// OBSOLETE     }
+// OBSOLETE      ,
+// OBSOLETE     {
+// OBSOLETE       sizeof (long), 4, "long"
+// OBSOLETE     }
+// OBSOLETE      ,
+// OBSOLETE     {
+// OBSOLETE       sizeof (float), 4, "float"
+// OBSOLETE     }
+// OBSOLETE      ,
+// OBSOLETE     {
+// OBSOLETE       sizeof (double), 8, "double"
+// OBSOLETE     }
+// OBSOLETE      ,
+// OBSOLETE     {
+// OBSOLETE       sizeof (char *), 4, "pointer"
+// OBSOLETE     }
+// OBSOLETE      ,
+// OBSOLETE   };
+// OBSOLETE #define TYPELEN	(sizeof(types) / sizeof(struct typestruct))
+// OBSOLETE 
+// OBSOLETE   /* Make sure that host type sizes are same as i960
+// OBSOLETE    */
+// OBSOLETE   for (i = 0; i < TYPELEN; i++)
+// OBSOLETE     {
+// OBSOLETE       if (types[i].hostsize != types[i].i960size)
+// OBSOLETE 	{
+// OBSOLETE 	  printf_unfiltered ("sizeof(%s) != %d:  PROCEED AT YOUR OWN RISK!\n",
+// OBSOLETE 			     types[i].typename, types[i].i960size);
+// OBSOLETE 	}
+// OBSOLETE 
+// OBSOLETE     }
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Is this register part of the register window system?  A yes answer
+// OBSOLETE    implies that 1) The name of this register will not be the same in
+// OBSOLETE    other frames, and 2) This register is automatically "saved" upon
+// OBSOLETE    subroutine calls and thus there is no need to search more than one
+// OBSOLETE    stack frame for it.
+// OBSOLETE 
+// OBSOLETE    On the i960, in fact, the name of this register in another frame is
+// OBSOLETE    "mud" -- there is no overlap between the windows.  Each window is
+// OBSOLETE    simply saved into the stack (true for our purposes, after having been
+// OBSOLETE    flushed; normally they reside on-chip and are restored from on-chip
+// OBSOLETE    without ever going to memory).  */
+// OBSOLETE 
+// OBSOLETE static int
+// OBSOLETE register_in_window_p (int regnum)
+// OBSOLETE {
+// OBSOLETE   return regnum <= R15_REGNUM;
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* i960_find_saved_register ()
+// OBSOLETE 
+// OBSOLETE    Return the address in which frame FRAME's value of register REGNUM
+// OBSOLETE    has been saved in memory.  Or return zero if it has not been saved.
+// OBSOLETE    If REGNUM specifies the SP, the value we return is actually the SP
+// OBSOLETE    value, not an address where it was saved.  */
+// OBSOLETE 
+// OBSOLETE static CORE_ADDR
+// OBSOLETE i960_find_saved_register (struct frame_info *frame, int regnum)
+// OBSOLETE {
+// OBSOLETE   register struct frame_info *frame1 = NULL;
+// OBSOLETE   register CORE_ADDR addr = 0;
+// OBSOLETE 
+// OBSOLETE   if (frame == NULL)		/* No regs saved if want current frame */
+// OBSOLETE     return 0;
+// OBSOLETE 
+// OBSOLETE   /* We assume that a register in a register window will only be saved
+// OBSOLETE      in one place (since the name changes and/or disappears as you go
+// OBSOLETE      towards inner frames), so we only call get_frame_saved_regs on
+// OBSOLETE      the current frame.  This is directly in contradiction to the
+// OBSOLETE      usage below, which assumes that registers used in a frame must be
+// OBSOLETE      saved in a lower (more interior) frame.  This change is a result
+// OBSOLETE      of working on a register window machine; get_frame_saved_regs
+// OBSOLETE      always returns the registers saved within a frame, within the
+// OBSOLETE      context (register namespace) of that frame. */
+// OBSOLETE 
+// OBSOLETE   /* However, note that we don't want this to return anything if
+// OBSOLETE      nothing is saved (if there's a frame inside of this one).  Also,
+// OBSOLETE      callers to this routine asking for the stack pointer want the
+// OBSOLETE      stack pointer saved for *this* frame; this is returned from the
+// OBSOLETE      next frame.  */
+// OBSOLETE 
+// OBSOLETE   if (register_in_window_p (regnum))
+// OBSOLETE     {
+// OBSOLETE       frame1 = get_next_frame (frame);
+// OBSOLETE       if (!frame1)
+// OBSOLETE 	return 0;		/* Registers of this frame are active.  */
+// OBSOLETE 
+// OBSOLETE       /* Get the SP from the next frame in; it will be this
+// OBSOLETE          current frame.  */
+// OBSOLETE       if (regnum != SP_REGNUM)
+// OBSOLETE 	frame1 = frame;
+// OBSOLETE 
+// OBSOLETE       FRAME_INIT_SAVED_REGS (frame1);
+// OBSOLETE       return frame1->saved_regs[regnum];	/* ... which might be zero */
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Note that this next routine assumes that registers used in
+// OBSOLETE      frame x will be saved only in the frame that x calls and
+// OBSOLETE      frames interior to it.  This is not true on the sparc, but the
+// OBSOLETE      above macro takes care of it, so we should be all right. */
+// OBSOLETE   while (1)
+// OBSOLETE     {
+// OBSOLETE       QUIT;
+// OBSOLETE       frame1 = get_next_frame (frame);
+// OBSOLETE       if (frame1 == 0)
+// OBSOLETE 	break;
+// OBSOLETE       frame = frame1;
+// OBSOLETE       FRAME_INIT_SAVED_REGS (frame1);
+// OBSOLETE       if (frame1->saved_regs[regnum])
+// OBSOLETE 	addr = frame1->saved_regs[regnum];
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   return addr;
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* i960_get_saved_register ()
+// OBSOLETE 
+// OBSOLETE    Find register number REGNUM relative to FRAME and put its (raw,
+// OBSOLETE    target format) contents in *RAW_BUFFER.  Set *OPTIMIZED if the
+// OBSOLETE    variable was optimized out (and thus can't be fetched).  Set *LVAL
+// OBSOLETE    to lval_memory, lval_register, or not_lval, depending on whether
+// OBSOLETE    the value was fetched from memory, from a register, or in a strange
+// OBSOLETE    and non-modifiable way (e.g. a frame pointer which was calculated
+// OBSOLETE    rather than fetched).  Set *ADDRP to the address, either in memory
+// OBSOLETE    on as a REGISTER_BYTE offset into the registers array.
+// OBSOLETE 
+// OBSOLETE    Note that this implementation never sets *LVAL to not_lval.  But it
+// OBSOLETE    can be replaced by defining GET_SAVED_REGISTER and supplying your
+// OBSOLETE    own.
+// OBSOLETE 
+// OBSOLETE    The argument RAW_BUFFER must point to aligned memory.  */
+// OBSOLETE 
+// OBSOLETE void
+// OBSOLETE i960_get_saved_register (char *raw_buffer,
+// OBSOLETE 			 int *optimized,
+// OBSOLETE 			 CORE_ADDR *addrp,
+// OBSOLETE 			 struct frame_info *frame,
+// OBSOLETE 			 int regnum,
+// OBSOLETE 			 enum lval_type *lval)
+// OBSOLETE {
+// OBSOLETE   CORE_ADDR addr;
+// OBSOLETE 
+// OBSOLETE   if (!target_has_registers)
+// OBSOLETE     error ("No registers.");
+// OBSOLETE 
+// OBSOLETE   /* Normal systems don't optimize out things with register numbers.  */
+// OBSOLETE   if (optimized != NULL)
+// OBSOLETE     *optimized = 0;
+// OBSOLETE   addr = i960_find_saved_register (frame, regnum);
+// OBSOLETE   if (addr != 0)
+// OBSOLETE     {
+// OBSOLETE       if (lval != NULL)
+// OBSOLETE 	*lval = lval_memory;
+// OBSOLETE       if (regnum == SP_REGNUM)
+// OBSOLETE 	{
+// OBSOLETE 	  if (raw_buffer != NULL)
+// OBSOLETE 	    {
+// OBSOLETE 	      /* Put it back in target format.  */
+// OBSOLETE 	      store_address (raw_buffer, REGISTER_RAW_SIZE (regnum),
+// OBSOLETE 			     (LONGEST) addr);
+// OBSOLETE 	    }
+// OBSOLETE 	  if (addrp != NULL)
+// OBSOLETE 	    *addrp = 0;
+// OBSOLETE 	  return;
+// OBSOLETE 	}
+// OBSOLETE       if (raw_buffer != NULL)
+// OBSOLETE 	target_read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
+// OBSOLETE     }
+// OBSOLETE   else
+// OBSOLETE     {
+// OBSOLETE       if (lval != NULL)
+// OBSOLETE 	*lval = lval_register;
+// OBSOLETE       addr = REGISTER_BYTE (regnum);
+// OBSOLETE       if (raw_buffer != NULL)
+// OBSOLETE 	read_register_gen (regnum, raw_buffer);
+// OBSOLETE     }
+// OBSOLETE   if (addrp != NULL)
+// OBSOLETE     *addrp = addr;
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Examine an i960 function prologue, recording the addresses at which
+// OBSOLETE    registers are saved explicitly by the prologue code, and returning
+// OBSOLETE    the address of the first instruction after the prologue (but not
+// OBSOLETE    after the instruction at address LIMIT, as explained below).
+// OBSOLETE 
+// OBSOLETE    LIMIT places an upper bound on addresses of the instructions to be
+// OBSOLETE    examined.  If the prologue code scan reaches LIMIT, the scan is
+// OBSOLETE    aborted and LIMIT is returned.  This is used, when examining the
+// OBSOLETE    prologue for the current frame, to keep examine_prologue () from
+// OBSOLETE    claiming that a given register has been saved when in fact the
+// OBSOLETE    instruction that saves it has not yet been executed.  LIMIT is used
+// OBSOLETE    at other times to stop the scan when we hit code after the true
+// OBSOLETE    function prologue (e.g. for the first source line) which might
+// OBSOLETE    otherwise be mistaken for function prologue.
+// OBSOLETE 
+// OBSOLETE    The format of the function prologue matched by this routine is
+// OBSOLETE    derived from examination of the source to gcc960 1.21, particularly
+// OBSOLETE    the routine i960_function_prologue ().  A "regular expression" for
+// OBSOLETE    the function prologue is given below:
+// OBSOLETE 
+// OBSOLETE    (lda LRn, g14
+// OBSOLETE    mov g14, g[0-7]
+// OBSOLETE    (mov 0, g14) | (lda 0, g14))?
+// OBSOLETE 
+// OBSOLETE    (mov[qtl]? g[0-15], r[4-15])*
+// OBSOLETE    ((addo [1-31], sp, sp) | (lda n(sp), sp))?
+// OBSOLETE    (st[qtl]? g[0-15], n(fp))*
+// OBSOLETE 
+// OBSOLETE    (cmpobne 0, g14, LFn
+// OBSOLETE    mov sp, g14
+// OBSOLETE    lda 0x30(sp), sp
+// OBSOLETE    LFn: stq g0, (g14)
+// OBSOLETE    stq g4, 0x10(g14)
+// OBSOLETE    stq g8, 0x20(g14))?
+// OBSOLETE 
+// OBSOLETE    (st g14, n(fp))?
+// OBSOLETE    (mov g13,r[4-15])?
+// OBSOLETE  */
+// OBSOLETE 
+// OBSOLETE /* Macros for extracting fields from i960 instructions.  */
+// OBSOLETE 
+// OBSOLETE #define BITMASK(pos, width) (((0x1 << (width)) - 1) << (pos))
+// OBSOLETE #define EXTRACT_FIELD(val, pos, width) ((val) >> (pos) & BITMASK (0, width))
+// OBSOLETE 
+// OBSOLETE #define REG_SRC1(insn)    EXTRACT_FIELD (insn, 0, 5)
+// OBSOLETE #define REG_SRC2(insn)    EXTRACT_FIELD (insn, 14, 5)
+// OBSOLETE #define REG_SRCDST(insn)  EXTRACT_FIELD (insn, 19, 5)
+// OBSOLETE #define MEM_SRCDST(insn)  EXTRACT_FIELD (insn, 19, 5)
+// OBSOLETE #define MEMA_OFFSET(insn) EXTRACT_FIELD (insn, 0, 12)
+// OBSOLETE 
+// OBSOLETE /* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or
+// OBSOLETE    is not the address of a valid instruction, the address of the next
+// OBSOLETE    instruction beyond ADDR otherwise.  *PWORD1 receives the first word
+// OBSOLETE    of the instruction, and (for two-word instructions), *PWORD2 receives
+// OBSOLETE    the second.  */
+// OBSOLETE 
+// OBSOLETE #define NEXT_PROLOGUE_INSN(addr, lim, pword1, pword2) \
+// OBSOLETE   (((addr) < (lim)) ? next_insn (addr, pword1, pword2) : 0)
+// OBSOLETE 
+// OBSOLETE static CORE_ADDR
+// OBSOLETE examine_prologue (register CORE_ADDR ip, register CORE_ADDR limit,
+// OBSOLETE 		  CORE_ADDR frame_addr, struct frame_saved_regs *fsr)
+// OBSOLETE {
+// OBSOLETE   register CORE_ADDR next_ip;
+// OBSOLETE   register int src, dst;
+// OBSOLETE   register unsigned int *pcode;
+// OBSOLETE   unsigned int insn1, insn2;
+// OBSOLETE   int size;
+// OBSOLETE   int within_leaf_prologue;
+// OBSOLETE   CORE_ADDR save_addr;
+// OBSOLETE   static unsigned int varargs_prologue_code[] =
+// OBSOLETE   {
+// OBSOLETE     0x3507a00c,			/* cmpobne 0x0, g14, LFn */
+// OBSOLETE     0x5cf01601,			/* mov sp, g14           */
+// OBSOLETE     0x8c086030,			/* lda 0x30(sp), sp      */
+// OBSOLETE     0xb2879000,			/* LFn: stq  g0, (g14)   */
+// OBSOLETE     0xb2a7a010,			/* stq g4, 0x10(g14)     */
+// OBSOLETE     0xb2c7a020			/* stq g8, 0x20(g14)     */
+// OBSOLETE   };
+// OBSOLETE 
+// OBSOLETE   /* Accept a leaf procedure prologue code fragment if present.
+// OBSOLETE      Note that ip might point to either the leaf or non-leaf
+// OBSOLETE      entry point; we look for the non-leaf entry point first:  */
+// OBSOLETE 
+// OBSOLETE   within_leaf_prologue = 0;
+// OBSOLETE   if ((next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2))
+// OBSOLETE       && ((insn1 & 0xfffff000) == 0x8cf00000	/* lda LRx, g14 (MEMA) */
+// OBSOLETE 	  || (insn1 & 0xfffffc60) == 0x8cf03000))	/* lda LRx, g14 (MEMB) */
+// OBSOLETE     {
+// OBSOLETE       within_leaf_prologue = 1;
+// OBSOLETE       next_ip = NEXT_PROLOGUE_INSN (next_ip, limit, &insn1, &insn2);
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Now look for the prologue code at a leaf entry point:  */
+// OBSOLETE 
+// OBSOLETE   if (next_ip
+// OBSOLETE       && (insn1 & 0xff87ffff) == 0x5c80161e	/* mov g14, gx */
+// OBSOLETE       && REG_SRCDST (insn1) <= G0_REGNUM + 7)
+// OBSOLETE     {
+// OBSOLETE       within_leaf_prologue = 1;
+// OBSOLETE       if ((next_ip = NEXT_PROLOGUE_INSN (next_ip, limit, &insn1, &insn2))
+// OBSOLETE 	  && (insn1 == 0x8cf00000	/* lda 0, g14 */
+// OBSOLETE 	      || insn1 == 0x5cf01e00))	/* mov 0, g14 */
+// OBSOLETE 	{
+// OBSOLETE 	  ip = next_ip;
+// OBSOLETE 	  next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
+// OBSOLETE 	  within_leaf_prologue = 0;
+// OBSOLETE 	}
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* If something that looks like the beginning of a leaf prologue
+// OBSOLETE      has been seen, but the remainder of the prologue is missing, bail.
+// OBSOLETE      We don't know what we've got.  */
+// OBSOLETE 
+// OBSOLETE   if (within_leaf_prologue)
+// OBSOLETE     return (ip);
+// OBSOLETE 
+// OBSOLETE   /* Accept zero or more instances of "mov[qtl]? gx, ry", where y >= 4.
+// OBSOLETE      This may cause us to mistake the moving of a register
+// OBSOLETE      parameter to a local register for the saving of a callee-saved
+// OBSOLETE      register, but that can't be helped, since with the
+// OBSOLETE      "-fcall-saved" flag, any register can be made callee-saved.  */
+// OBSOLETE 
+// OBSOLETE   while (next_ip
+// OBSOLETE 	 && (insn1 & 0xfc802fb0) == 0x5c000610
+// OBSOLETE 	 && (dst = REG_SRCDST (insn1)) >= (R0_REGNUM + 4))
+// OBSOLETE     {
+// OBSOLETE       src = REG_SRC1 (insn1);
+// OBSOLETE       size = EXTRACT_FIELD (insn1, 24, 2) + 1;
+// OBSOLETE       save_addr = frame_addr + ((dst - R0_REGNUM) * 4);
+// OBSOLETE       while (size--)
+// OBSOLETE 	{
+// OBSOLETE 	  fsr->regs[src++] = save_addr;
+// OBSOLETE 	  save_addr += 4;
+// OBSOLETE 	}
+// OBSOLETE       ip = next_ip;
+// OBSOLETE       next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Accept an optional "addo n, sp, sp" or "lda n(sp), sp".  */
+// OBSOLETE 
+// OBSOLETE   if (next_ip &&
+// OBSOLETE       ((insn1 & 0xffffffe0) == 0x59084800	/* addo n, sp, sp */
+// OBSOLETE        || (insn1 & 0xfffff000) == 0x8c086000	/* lda n(sp), sp (MEMA) */
+// OBSOLETE        || (insn1 & 0xfffffc60) == 0x8c087400))	/* lda n(sp), sp (MEMB) */
+// OBSOLETE     {
+// OBSOLETE       ip = next_ip;
+// OBSOLETE       next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Accept zero or more instances of "st[qtl]? gx, n(fp)".  
+// OBSOLETE      This may cause us to mistake the copying of a register
+// OBSOLETE      parameter to the frame for the saving of a callee-saved
+// OBSOLETE      register, but that can't be helped, since with the
+// OBSOLETE      "-fcall-saved" flag, any register can be made callee-saved.
+// OBSOLETE      We can, however, refuse to accept a save of register g14,
+// OBSOLETE      since that is matched explicitly below.  */
+// OBSOLETE 
+// OBSOLETE   while (next_ip &&
+// OBSOLETE 	 ((insn1 & 0xf787f000) == 0x9287e000	/* stl? gx, n(fp) (MEMA) */
+// OBSOLETE 	  || (insn1 & 0xf787fc60) == 0x9287f400		/* stl? gx, n(fp) (MEMB) */
+// OBSOLETE 	  || (insn1 & 0xef87f000) == 0xa287e000		/* st[tq] gx, n(fp) (MEMA) */
+// OBSOLETE 	  || (insn1 & 0xef87fc60) == 0xa287f400)	/* st[tq] gx, n(fp) (MEMB) */
+// OBSOLETE 	 && ((src = MEM_SRCDST (insn1)) != G14_REGNUM))
+// OBSOLETE     {
+// OBSOLETE       save_addr = frame_addr + ((insn1 & BITMASK (12, 1))
+// OBSOLETE 				? insn2 : MEMA_OFFSET (insn1));
+// OBSOLETE       size = (insn1 & BITMASK (29, 1)) ? ((insn1 & BITMASK (28, 1)) ? 4 : 3)
+// OBSOLETE 	: ((insn1 & BITMASK (27, 1)) ? 2 : 1);
+// OBSOLETE       while (size--)
+// OBSOLETE 	{
+// OBSOLETE 	  fsr->regs[src++] = save_addr;
+// OBSOLETE 	  save_addr += 4;
+// OBSOLETE 	}
+// OBSOLETE       ip = next_ip;
+// OBSOLETE       next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Accept the varargs prologue code if present.  */
+// OBSOLETE 
+// OBSOLETE   size = sizeof (varargs_prologue_code) / sizeof (int);
+// OBSOLETE   pcode = varargs_prologue_code;
+// OBSOLETE   while (size-- && next_ip && *pcode++ == insn1)
+// OBSOLETE     {
+// OBSOLETE       ip = next_ip;
+// OBSOLETE       next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Accept an optional "st g14, n(fp)".  */
+// OBSOLETE 
+// OBSOLETE   if (next_ip &&
+// OBSOLETE       ((insn1 & 0xfffff000) == 0x92f7e000	/* st g14, n(fp) (MEMA) */
+// OBSOLETE        || (insn1 & 0xfffffc60) == 0x92f7f400))	/* st g14, n(fp) (MEMB) */
+// OBSOLETE     {
+// OBSOLETE       fsr->regs[G14_REGNUM] = frame_addr + ((insn1 & BITMASK (12, 1))
+// OBSOLETE 					    ? insn2 : MEMA_OFFSET (insn1));
+// OBSOLETE       ip = next_ip;
+// OBSOLETE       next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Accept zero or one instance of "mov g13, ry", where y >= 4.
+// OBSOLETE      This is saving the address where a struct should be returned.  */
+// OBSOLETE 
+// OBSOLETE   if (next_ip
+// OBSOLETE       && (insn1 & 0xff802fbf) == 0x5c00061d
+// OBSOLETE       && (dst = REG_SRCDST (insn1)) >= (R0_REGNUM + 4))
+// OBSOLETE     {
+// OBSOLETE       save_addr = frame_addr + ((dst - R0_REGNUM) * 4);
+// OBSOLETE       fsr->regs[G0_REGNUM + 13] = save_addr;
+// OBSOLETE       ip = next_ip;
+// OBSOLETE #if 0				/* We'll need this once there is a subsequent instruction examined. */
+// OBSOLETE       next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
+// OBSOLETE #endif
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   return (ip);
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Given an ip value corresponding to the start of a function,
+// OBSOLETE    return the ip of the first instruction after the function 
+// OBSOLETE    prologue.  */
+// OBSOLETE 
+// OBSOLETE CORE_ADDR
+// OBSOLETE i960_skip_prologue (CORE_ADDR ip)
+// OBSOLETE {
+// OBSOLETE   struct frame_saved_regs saved_regs_dummy;
+// OBSOLETE   struct symtab_and_line sal;
+// OBSOLETE   CORE_ADDR limit;
+// OBSOLETE 
+// OBSOLETE   sal = find_pc_line (ip, 0);
+// OBSOLETE   limit = (sal.end) ? sal.end : 0xffffffff;
+// OBSOLETE 
+// OBSOLETE   return (examine_prologue (ip, limit, (CORE_ADDR) 0, &saved_regs_dummy));
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Put here the code to store, into a struct frame_saved_regs,
+// OBSOLETE    the addresses of the saved registers of frame described by FRAME_INFO.
+// OBSOLETE    This includes special registers such as pc and fp saved in special
+// OBSOLETE    ways in the stack frame.  sp is even more special:
+// OBSOLETE    the address we return for it IS the sp for the next frame.
+// OBSOLETE 
+// OBSOLETE    We cache the result of doing this in the frame_obstack, since it is
+// OBSOLETE    fairly expensive.  */
+// OBSOLETE 
+// OBSOLETE void
+// OBSOLETE frame_find_saved_regs (struct frame_info *fi, struct frame_saved_regs *fsr)
+// OBSOLETE {
+// OBSOLETE   register CORE_ADDR next_addr;
+// OBSOLETE   register CORE_ADDR *saved_regs;
+// OBSOLETE   register int regnum;
+// OBSOLETE   register struct frame_saved_regs *cache_fsr;
+// OBSOLETE   CORE_ADDR ip;
+// OBSOLETE   struct symtab_and_line sal;
+// OBSOLETE   CORE_ADDR limit;
+// OBSOLETE 
+// OBSOLETE   if (!fi->fsr)
+// OBSOLETE     {
+// OBSOLETE       cache_fsr = (struct frame_saved_regs *)
+// OBSOLETE 	frame_obstack_alloc (sizeof (struct frame_saved_regs));
+// OBSOLETE       memset (cache_fsr, '\0', sizeof (struct frame_saved_regs));
+// OBSOLETE       fi->fsr = cache_fsr;
+// OBSOLETE 
+// OBSOLETE       /* Find the start and end of the function prologue.  If the PC
+// OBSOLETE          is in the function prologue, we only consider the part that
+// OBSOLETE          has executed already.  */
+// OBSOLETE 
+// OBSOLETE       ip = get_pc_function_start (fi->pc);
+// OBSOLETE       sal = find_pc_line (ip, 0);
+// OBSOLETE       limit = (sal.end && sal.end < fi->pc) ? sal.end : fi->pc;
+// OBSOLETE 
+// OBSOLETE       examine_prologue (ip, limit, fi->frame, cache_fsr);
+// OBSOLETE 
+// OBSOLETE       /* Record the addresses at which the local registers are saved.
+// OBSOLETE          Strictly speaking, we should only do this for non-leaf procedures,
+// OBSOLETE          but no one will ever look at these values if it is a leaf procedure,
+// OBSOLETE          since local registers are always caller-saved.  */
+// OBSOLETE 
+// OBSOLETE       next_addr = (CORE_ADDR) fi->frame;
+// OBSOLETE       saved_regs = cache_fsr->regs;
+// OBSOLETE       for (regnum = R0_REGNUM; regnum <= R15_REGNUM; regnum++)
+// OBSOLETE 	{
+// OBSOLETE 	  *saved_regs++ = next_addr;
+// OBSOLETE 	  next_addr += 4;
+// OBSOLETE 	}
+// OBSOLETE 
+// OBSOLETE       cache_fsr->regs[FP_REGNUM] = cache_fsr->regs[PFP_REGNUM];
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   *fsr = *fi->fsr;
+// OBSOLETE 
+// OBSOLETE   /* Fetch the value of the sp from memory every time, since it
+// OBSOLETE      is conceivable that it has changed since the cache was flushed.  
+// OBSOLETE      This unfortunately undoes much of the savings from caching the 
+// OBSOLETE      saved register values.  I suggest adding an argument to 
+// OBSOLETE      get_frame_saved_regs () specifying the register number we're
+// OBSOLETE      interested in (or -1 for all registers).  This would be passed
+// OBSOLETE      through to FRAME_FIND_SAVED_REGS (), permitting more efficient
+// OBSOLETE      computation of saved register addresses (e.g., on the i960,
+// OBSOLETE      we don't have to examine the prologue to find local registers). 
+// OBSOLETE      -- markf@wrs.com 
+// OBSOLETE      FIXME, we don't need to refetch this, since the cache is cleared
+// OBSOLETE      every time the child process is restarted.  If GDB itself
+// OBSOLETE      modifies SP, it has to clear the cache by hand (does it?).  -gnu */
+// OBSOLETE 
+// OBSOLETE   fsr->regs[SP_REGNUM] = read_memory_integer (fsr->regs[SP_REGNUM], 4);
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Return the address of the argument block for the frame
+// OBSOLETE    described by FI.  Returns 0 if the address is unknown.  */
+// OBSOLETE 
+// OBSOLETE CORE_ADDR
+// OBSOLETE frame_args_address (struct frame_info *fi, int must_be_correct)
+// OBSOLETE {
+// OBSOLETE   struct frame_saved_regs fsr;
+// OBSOLETE   CORE_ADDR ap;
+// OBSOLETE 
+// OBSOLETE   /* If g14 was saved in the frame by the function prologue code, return
+// OBSOLETE      the saved value.  If the frame is current and we are being sloppy,
+// OBSOLETE      return the value of g14.  Otherwise, return zero.  */
+// OBSOLETE 
+// OBSOLETE   get_frame_saved_regs (fi, &fsr);
+// OBSOLETE   if (fsr.regs[G14_REGNUM])
+// OBSOLETE     ap = read_memory_integer (fsr.regs[G14_REGNUM], 4);
+// OBSOLETE   else
+// OBSOLETE     {
+// OBSOLETE       if (must_be_correct)
+// OBSOLETE 	return 0;		/* Don't cache this result */
+// OBSOLETE       if (get_next_frame (fi))
+// OBSOLETE 	ap = 0;
+// OBSOLETE       else
+// OBSOLETE 	ap = read_register (G14_REGNUM);
+// OBSOLETE       if (ap == 0)
+// OBSOLETE 	ap = fi->frame;
+// OBSOLETE     }
+// OBSOLETE   fi->arg_pointer = ap;		/* Cache it for next time */
+// OBSOLETE   return ap;
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Return the address of the return struct for the frame
+// OBSOLETE    described by FI.  Returns 0 if the address is unknown.  */
+// OBSOLETE 
+// OBSOLETE CORE_ADDR
+// OBSOLETE frame_struct_result_address (struct frame_info *fi)
+// OBSOLETE {
+// OBSOLETE   struct frame_saved_regs fsr;
+// OBSOLETE   CORE_ADDR ap;
+// OBSOLETE 
+// OBSOLETE   /* If the frame is non-current, check to see if g14 was saved in the
+// OBSOLETE      frame by the function prologue code; return the saved value if so,
+// OBSOLETE      zero otherwise.  If the frame is current, return the value of g14.
+// OBSOLETE 
+// OBSOLETE      FIXME, shouldn't this use the saved value as long as we are past
+// OBSOLETE      the function prologue, and only use the current value if we have
+// OBSOLETE      no saved value and are at TOS?   -- gnu@cygnus.com */
+// OBSOLETE 
+// OBSOLETE   if (get_next_frame (fi))
+// OBSOLETE     {
+// OBSOLETE       get_frame_saved_regs (fi, &fsr);
+// OBSOLETE       if (fsr.regs[G13_REGNUM])
+// OBSOLETE 	ap = read_memory_integer (fsr.regs[G13_REGNUM], 4);
+// OBSOLETE       else
+// OBSOLETE 	ap = 0;
+// OBSOLETE     }
+// OBSOLETE   else
+// OBSOLETE     ap = read_register (G13_REGNUM);
+// OBSOLETE 
+// OBSOLETE   return ap;
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Return address to which the currently executing leafproc will return,
+// OBSOLETE    or 0 if IP, the value of the instruction pointer from the currently
+// OBSOLETE    executing function, is not in a leafproc (or if we can't tell if it
+// OBSOLETE    is).
+// OBSOLETE 
+// OBSOLETE    Do this by finding the starting address of the routine in which IP lies.
+// OBSOLETE    If the instruction there is "mov g14, gx" (where x is in [0,7]), this
+// OBSOLETE    is a leafproc and the return address is in register gx.  Well, this is
+// OBSOLETE    true unless the return address points at a RET instruction in the current
+// OBSOLETE    procedure, which indicates that we have a 'dual entry' routine that
+// OBSOLETE    has been entered through the CALL entry point.  */
+// OBSOLETE 
+// OBSOLETE CORE_ADDR
+// OBSOLETE leafproc_return (CORE_ADDR ip)
+// OBSOLETE {
+// OBSOLETE   register struct minimal_symbol *msymbol;
+// OBSOLETE   char *p;
+// OBSOLETE   int dst;
+// OBSOLETE   unsigned int insn1, insn2;
+// OBSOLETE   CORE_ADDR return_addr;
+// OBSOLETE 
+// OBSOLETE   if ((msymbol = lookup_minimal_symbol_by_pc (ip)) != NULL)
+// OBSOLETE     {
+// OBSOLETE       if ((p = strchr (SYMBOL_NAME (msymbol), '.')) && STREQ (p, ".lf"))
+// OBSOLETE 	{
+// OBSOLETE 	  if (next_insn (SYMBOL_VALUE_ADDRESS (msymbol), &insn1, &insn2)
+// OBSOLETE 	      && (insn1 & 0xff87ffff) == 0x5c80161e	/* mov g14, gx */
+// OBSOLETE 	      && (dst = REG_SRCDST (insn1)) <= G0_REGNUM + 7)
+// OBSOLETE 	    {
+// OBSOLETE 	      /* Get the return address.  If the "mov g14, gx" 
+// OBSOLETE 	         instruction hasn't been executed yet, read
+// OBSOLETE 	         the return address from g14; otherwise, read it
+// OBSOLETE 	         from the register into which g14 was moved.  */
+// OBSOLETE 
+// OBSOLETE 	      return_addr =
+// OBSOLETE 		read_register ((ip == SYMBOL_VALUE_ADDRESS (msymbol))
+// OBSOLETE 			       ? G14_REGNUM : dst);
+// OBSOLETE 
+// OBSOLETE 	      /* We know we are in a leaf procedure, but we don't know
+// OBSOLETE 	         whether the caller actually did a "bal" to the ".lf"
+// OBSOLETE 	         entry point, or a normal "call" to the non-leaf entry
+// OBSOLETE 	         point one instruction before.  In the latter case, the
+// OBSOLETE 	         return address will be the address of a "ret"
+// OBSOLETE 	         instruction within the procedure itself.  We test for
+// OBSOLETE 	         this below.  */
+// OBSOLETE 
+// OBSOLETE 	      if (!next_insn (return_addr, &insn1, &insn2)
+// OBSOLETE 		  || (insn1 & 0xff000000) != 0xa000000	/* ret */
+// OBSOLETE 		  || lookup_minimal_symbol_by_pc (return_addr) != msymbol)
+// OBSOLETE 		return (return_addr);
+// OBSOLETE 	    }
+// OBSOLETE 	}
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   return (0);
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Immediately after a function call, return the saved pc.
+// OBSOLETE    Can't go through the frames for this because on some machines
+// OBSOLETE    the new frame is not set up until the new function executes
+// OBSOLETE    some instructions. 
+// OBSOLETE    On the i960, the frame *is* set up immediately after the call,
+// OBSOLETE    unless the function is a leaf procedure.  */
+// OBSOLETE 
+// OBSOLETE CORE_ADDR
+// OBSOLETE saved_pc_after_call (struct frame_info *frame)
+// OBSOLETE {
+// OBSOLETE   CORE_ADDR saved_pc;
+// OBSOLETE 
+// OBSOLETE   saved_pc = leafproc_return (get_frame_pc (frame));
+// OBSOLETE   if (!saved_pc)
+// OBSOLETE     saved_pc = FRAME_SAVED_PC (frame);
+// OBSOLETE 
+// OBSOLETE   return saved_pc;
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Discard from the stack the innermost frame,
+// OBSOLETE    restoring all saved registers.  */
+// OBSOLETE 
+// OBSOLETE void
+// OBSOLETE i960_pop_frame (void)
+// OBSOLETE {
+// OBSOLETE   register struct frame_info *current_fi, *prev_fi;
+// OBSOLETE   register int i;
+// OBSOLETE   CORE_ADDR save_addr;
+// OBSOLETE   CORE_ADDR leaf_return_addr;
+// OBSOLETE   struct frame_saved_regs fsr;
+// OBSOLETE   char local_regs_buf[16 * 4];
+// OBSOLETE 
+// OBSOLETE   current_fi = get_current_frame ();
+// OBSOLETE 
+// OBSOLETE   /* First, undo what the hardware does when we return.
+// OBSOLETE      If this is a non-leaf procedure, restore local registers from
+// OBSOLETE      the save area in the calling frame.  Otherwise, load the return
+// OBSOLETE      address obtained from leafproc_return () into the rip.  */
+// OBSOLETE 
+// OBSOLETE   leaf_return_addr = leafproc_return (current_fi->pc);
+// OBSOLETE   if (!leaf_return_addr)
+// OBSOLETE     {
+// OBSOLETE       /* Non-leaf procedure.  Restore local registers, incl IP.  */
+// OBSOLETE       prev_fi = get_prev_frame (current_fi);
+// OBSOLETE       read_memory (prev_fi->frame, local_regs_buf, sizeof (local_regs_buf));
+// OBSOLETE       write_register_bytes (REGISTER_BYTE (R0_REGNUM), local_regs_buf,
+// OBSOLETE 			    sizeof (local_regs_buf));
+// OBSOLETE 
+// OBSOLETE       /* Restore frame pointer.  */
+// OBSOLETE       write_register (FP_REGNUM, prev_fi->frame);
+// OBSOLETE     }
+// OBSOLETE   else
+// OBSOLETE     {
+// OBSOLETE       /* Leaf procedure.  Just restore the return address into the IP.  */
+// OBSOLETE       write_register (RIP_REGNUM, leaf_return_addr);
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Now restore any global regs that the current function had saved. */
+// OBSOLETE   get_frame_saved_regs (current_fi, &fsr);
+// OBSOLETE   for (i = G0_REGNUM; i < G14_REGNUM; i++)
+// OBSOLETE     {
+// OBSOLETE       save_addr = fsr.regs[i];
+// OBSOLETE       if (save_addr != 0)
+// OBSOLETE 	write_register (i, read_memory_integer (save_addr, 4));
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   /* Flush the frame cache, create a frame for the new innermost frame,
+// OBSOLETE      and make it the current frame.  */
+// OBSOLETE 
+// OBSOLETE   flush_cached_frames ();
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Given a 960 stop code (fault or trace), return the signal which
+// OBSOLETE    corresponds.  */
+// OBSOLETE 
+// OBSOLETE enum target_signal
+// OBSOLETE i960_fault_to_signal (int fault)
+// OBSOLETE {
+// OBSOLETE   switch (fault)
+// OBSOLETE     {
+// OBSOLETE     case 0:
+// OBSOLETE       return TARGET_SIGNAL_BUS;	/* parallel fault */
+// OBSOLETE     case 1:
+// OBSOLETE       return TARGET_SIGNAL_UNKNOWN;
+// OBSOLETE     case 2:
+// OBSOLETE       return TARGET_SIGNAL_ILL;	/* operation fault */
+// OBSOLETE     case 3:
+// OBSOLETE       return TARGET_SIGNAL_FPE;	/* arithmetic fault */
+// OBSOLETE     case 4:
+// OBSOLETE       return TARGET_SIGNAL_FPE;	/* floating point fault */
+// OBSOLETE 
+// OBSOLETE       /* constraint fault.  This appears not to distinguish between
+// OBSOLETE          a range constraint fault (which should be SIGFPE) and a privileged
+// OBSOLETE          fault (which should be SIGILL).  */
+// OBSOLETE     case 5:
+// OBSOLETE       return TARGET_SIGNAL_ILL;
+// OBSOLETE 
+// OBSOLETE     case 6:
+// OBSOLETE       return TARGET_SIGNAL_SEGV;	/* virtual memory fault */
+// OBSOLETE 
+// OBSOLETE       /* protection fault.  This is for an out-of-range argument to
+// OBSOLETE          "calls".  I guess it also could be SIGILL. */
+// OBSOLETE     case 7:
+// OBSOLETE       return TARGET_SIGNAL_SEGV;
+// OBSOLETE 
+// OBSOLETE     case 8:
+// OBSOLETE       return TARGET_SIGNAL_BUS;	/* machine fault */
+// OBSOLETE     case 9:
+// OBSOLETE       return TARGET_SIGNAL_BUS;	/* structural fault */
+// OBSOLETE     case 0xa:
+// OBSOLETE       return TARGET_SIGNAL_ILL;	/* type fault */
+// OBSOLETE     case 0xb:
+// OBSOLETE       return TARGET_SIGNAL_UNKNOWN;	/* reserved fault */
+// OBSOLETE     case 0xc:
+// OBSOLETE       return TARGET_SIGNAL_BUS;	/* process fault */
+// OBSOLETE     case 0xd:
+// OBSOLETE       return TARGET_SIGNAL_SEGV;	/* descriptor fault */
+// OBSOLETE     case 0xe:
+// OBSOLETE       return TARGET_SIGNAL_BUS;	/* event fault */
+// OBSOLETE     case 0xf:
+// OBSOLETE       return TARGET_SIGNAL_UNKNOWN;	/* reserved fault */
+// OBSOLETE     case 0x10:
+// OBSOLETE       return TARGET_SIGNAL_TRAP;	/* single-step trace */
+// OBSOLETE     case 0x11:
+// OBSOLETE       return TARGET_SIGNAL_TRAP;	/* branch trace */
+// OBSOLETE     case 0x12:
+// OBSOLETE       return TARGET_SIGNAL_TRAP;	/* call trace */
+// OBSOLETE     case 0x13:
+// OBSOLETE       return TARGET_SIGNAL_TRAP;	/* return trace */
+// OBSOLETE     case 0x14:
+// OBSOLETE       return TARGET_SIGNAL_TRAP;	/* pre-return trace */
+// OBSOLETE     case 0x15:
+// OBSOLETE       return TARGET_SIGNAL_TRAP;	/* supervisor call trace */
+// OBSOLETE     case 0x16:
+// OBSOLETE       return TARGET_SIGNAL_TRAP;	/* breakpoint trace */
+// OBSOLETE     default:
+// OBSOLETE       return TARGET_SIGNAL_UNKNOWN;
+// OBSOLETE     }
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /****************************************/
+// OBSOLETE /* MEM format                           */
+// OBSOLETE /****************************************/
+// OBSOLETE 
+// OBSOLETE struct tabent
+// OBSOLETE {
+// OBSOLETE   char *name;
+// OBSOLETE   char numops;
+// OBSOLETE };
+// OBSOLETE 
+// OBSOLETE /* Return instruction length, either 4 or 8.  When NOPRINT is non-zero
+// OBSOLETE    (TRUE), don't output any text.  (Actually, as implemented, if NOPRINT
+// OBSOLETE    is 0, abort() is called.) */
+// OBSOLETE 
+// OBSOLETE static int
+// OBSOLETE mem (unsigned long memaddr, unsigned long word1, unsigned long word2,
+// OBSOLETE      int noprint)
+// OBSOLETE {
+// OBSOLETE   int i, j;
+// OBSOLETE   int len;
+// OBSOLETE   int mode;
+// OBSOLETE   int offset;
+// OBSOLETE   const char *reg1, *reg2, *reg3;
+// OBSOLETE 
+// OBSOLETE   /* This lookup table is too sparse to make it worth typing in, but not
+// OBSOLETE    * so large as to make a sparse array necessary.  We allocate the
+// OBSOLETE    * table at runtime, initialize all entries to empty, and copy the
+// OBSOLETE    * real ones in from an initialization table.
+// OBSOLETE    *
+// OBSOLETE    * NOTE: In this table, the meaning of 'numops' is:
+// OBSOLETE    *       1: single operand
+// OBSOLETE    *       2: 2 operands, load instruction
+// OBSOLETE    *      -2: 2 operands, store instruction
+// OBSOLETE    */
+// OBSOLETE   static struct tabent *mem_tab = NULL;
+// OBSOLETE /* Opcodes of 0x8X, 9X, aX, bX, and cX must be in the table.  */
+// OBSOLETE #define MEM_MIN	0x80
+// OBSOLETE #define MEM_MAX	0xcf
+// OBSOLETE #define MEM_SIZ	((MEM_MAX-MEM_MIN+1) * sizeof(struct tabent))
+// OBSOLETE 
+// OBSOLETE   static struct
+// OBSOLETE     {
+// OBSOLETE       int opcode;
+// OBSOLETE       char *name;
+// OBSOLETE       char numops;
+// OBSOLETE     }
+// OBSOLETE   mem_init[] =
+// OBSOLETE   {
+// OBSOLETE     0x80, "ldob", 2,
+// OBSOLETE       0x82, "stob", -2,
+// OBSOLETE       0x84, "bx", 1,
+// OBSOLETE       0x85, "balx", 2,
+// OBSOLETE       0x86, "callx", 1,
+// OBSOLETE       0x88, "ldos", 2,
+// OBSOLETE       0x8a, "stos", -2,
+// OBSOLETE       0x8c, "lda", 2,
+// OBSOLETE       0x90, "ld", 2,
+// OBSOLETE       0x92, "st", -2,
+// OBSOLETE       0x98, "ldl", 2,
+// OBSOLETE       0x9a, "stl", -2,
+// OBSOLETE       0xa0, "ldt", 2,
+// OBSOLETE       0xa2, "stt", -2,
+// OBSOLETE       0xb0, "ldq", 2,
+// OBSOLETE       0xb2, "stq", -2,
+// OBSOLETE       0xc0, "ldib", 2,
+// OBSOLETE       0xc2, "stib", -2,
+// OBSOLETE       0xc8, "ldis", 2,
+// OBSOLETE       0xca, "stis", -2,
+// OBSOLETE       0, NULL, 0
+// OBSOLETE   };
+// OBSOLETE 
+// OBSOLETE   if (mem_tab == NULL)
+// OBSOLETE     {
+// OBSOLETE       mem_tab = (struct tabent *) xmalloc (MEM_SIZ);
+// OBSOLETE       memset (mem_tab, '\0', MEM_SIZ);
+// OBSOLETE       for (i = 0; mem_init[i].opcode != 0; i++)
+// OBSOLETE 	{
+// OBSOLETE 	  j = mem_init[i].opcode - MEM_MIN;
+// OBSOLETE 	  mem_tab[j].name = mem_init[i].name;
+// OBSOLETE 	  mem_tab[j].numops = mem_init[i].numops;
+// OBSOLETE 	}
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   i = ((word1 >> 24) & 0xff) - MEM_MIN;
+// OBSOLETE   mode = (word1 >> 10) & 0xf;
+// OBSOLETE 
+// OBSOLETE   if ((mem_tab[i].name != NULL)	/* Valid instruction */
+// OBSOLETE       && ((mode == 5) || (mode >= 12)))
+// OBSOLETE     {				/* With 32-bit displacement */
+// OBSOLETE       len = 8;
+// OBSOLETE     }
+// OBSOLETE   else
+// OBSOLETE     {
+// OBSOLETE       len = 4;
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   if (noprint)
+// OBSOLETE     {
+// OBSOLETE       return len;
+// OBSOLETE     }
+// OBSOLETE   internal_error (__FILE__, __LINE__, "failed internal consistency check");
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* Read the i960 instruction at 'memaddr' and return the address of 
+// OBSOLETE    the next instruction after that, or 0 if 'memaddr' is not the
+// OBSOLETE    address of a valid instruction.  The first word of the instruction
+// OBSOLETE    is stored at 'pword1', and the second word, if any, is stored at
+// OBSOLETE    'pword2'.  */
+// OBSOLETE 
+// OBSOLETE static CORE_ADDR
+// OBSOLETE next_insn (CORE_ADDR memaddr, unsigned int *pword1, unsigned int *pword2)
+// OBSOLETE {
+// OBSOLETE   int len;
+// OBSOLETE   char buf[8];
+// OBSOLETE 
+// OBSOLETE   /* Read the two (potential) words of the instruction at once,
+// OBSOLETE      to eliminate the overhead of two calls to read_memory ().
+// OBSOLETE      FIXME: Loses if the first one is readable but the second is not
+// OBSOLETE      (e.g. last word of the segment).  */
+// OBSOLETE 
+// OBSOLETE   read_memory (memaddr, buf, 8);
+// OBSOLETE   *pword1 = extract_unsigned_integer (buf, 4);
+// OBSOLETE   *pword2 = extract_unsigned_integer (buf + 4, 4);
+// OBSOLETE 
+// OBSOLETE   /* Divide instruction set into classes based on high 4 bits of opcode */
+// OBSOLETE 
+// OBSOLETE   switch ((*pword1 >> 28) & 0xf)
+// OBSOLETE     {
+// OBSOLETE     case 0x0:
+// OBSOLETE     case 0x1:			/* ctrl */
+// OBSOLETE 
+// OBSOLETE     case 0x2:
+// OBSOLETE     case 0x3:			/* cobr */
+// OBSOLETE 
+// OBSOLETE     case 0x5:
+// OBSOLETE     case 0x6:
+// OBSOLETE     case 0x7:			/* reg */
+// OBSOLETE       len = 4;
+// OBSOLETE       break;
+// OBSOLETE 
+// OBSOLETE     case 0x8:
+// OBSOLETE     case 0x9:
+// OBSOLETE     case 0xa:
+// OBSOLETE     case 0xb:
+// OBSOLETE     case 0xc:
+// OBSOLETE       len = mem (memaddr, *pword1, *pword2, 1);
+// OBSOLETE       break;
+// OBSOLETE 
+// OBSOLETE     default:			/* invalid instruction */
+// OBSOLETE       len = 0;
+// OBSOLETE       break;
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   if (len)
+// OBSOLETE     return memaddr + len;
+// OBSOLETE   else
+// OBSOLETE     return 0;
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE /* 'start_frame' is a variable in the MON960 runtime startup routine
+// OBSOLETE    that contains the frame pointer of the 'start' routine (the routine
+// OBSOLETE    that calls 'main').  By reading its contents out of remote memory,
+// OBSOLETE    we can tell where the frame chain ends:  backtraces should halt before
+// OBSOLETE    they display this frame.  */
+// OBSOLETE 
+// OBSOLETE int
+// OBSOLETE mon960_frame_chain_valid (CORE_ADDR chain, struct frame_info *curframe)
+// OBSOLETE {
+// OBSOLETE   struct symbol *sym;
+// OBSOLETE   struct minimal_symbol *msymbol;
+// OBSOLETE 
+// OBSOLETE   /* crtmon960.o is an assembler module that is assumed to be linked
+// OBSOLETE    * first in an i80960 executable.  It contains the true entry point;
+// OBSOLETE    * it performs startup up initialization and then calls 'main'.
+// OBSOLETE    *
+// OBSOLETE    * 'sf' is the name of a variable in crtmon960.o that is set
+// OBSOLETE    *      during startup to the address of the first frame.
+// OBSOLETE    *
+// OBSOLETE    * 'a' is the address of that variable in 80960 memory.
+// OBSOLETE    */
+// OBSOLETE   static char sf[] = "start_frame";
+// OBSOLETE   CORE_ADDR a;
+// OBSOLETE 
+// OBSOLETE 
+// OBSOLETE   chain &= ~0x3f;		/* Zero low 6 bits because previous frame pointers
+// OBSOLETE 				   contain return status info in them.  */
+// OBSOLETE   if (chain == 0)
+// OBSOLETE     {
+// OBSOLETE       return 0;
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   sym = lookup_symbol (sf, 0, VAR_NAMESPACE, (int *) NULL,
+// OBSOLETE 		       (struct symtab **) NULL);
+// OBSOLETE   if (sym != 0)
+// OBSOLETE     {
+// OBSOLETE       a = SYMBOL_VALUE (sym);
+// OBSOLETE     }
+// OBSOLETE   else
+// OBSOLETE     {
+// OBSOLETE       msymbol = lookup_minimal_symbol (sf, NULL, NULL);
+// OBSOLETE       if (msymbol == NULL)
+// OBSOLETE 	return 0;
+// OBSOLETE       a = SYMBOL_VALUE_ADDRESS (msymbol);
+// OBSOLETE     }
+// OBSOLETE 
+// OBSOLETE   return (chain != read_memory_integer (a, 4));
+// OBSOLETE }
+// OBSOLETE 
+// OBSOLETE 
+// OBSOLETE void
+// OBSOLETE _initialize_i960_tdep (void)
+// OBSOLETE {
+// OBSOLETE   check_host ();
+// OBSOLETE 
+// OBSOLETE   tm_print_insn = print_insn_i960;
+// OBSOLETE }