Initial creation of sourceware repository

1 files changed, 0 insertions, 838 deletions

diff --git a/gdb/i960-tdep.c b/gdb/i960-tdep.c
deleted file mode 100644
index e33415d..0000000
--- a/gdb/i960-tdep.c
+++ /dev/null
@@ -1,838 +0,0 @@
-/* Target-machine dependent code for the Intel 960
-   Copyright 1991, 1992, 1993, 1994, 1995 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"
-
-static CORE_ADDR next_insn PARAMS ((CORE_ADDR memaddr,
-				    unsigned int *pword1,
-				    unsigned int *pword2));
-
-/* 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 (gcc_p, type)
-     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()
-{
-	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 );
-		}
-
-	}
-}
-
-/* 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 (ip, limit, frame_addr, fsr)
-     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
-skip_prologue (ip)
-     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 (fi, fsr)
-     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 (fi, must_be_correct)
-     struct frame_info *fi;
-{
-  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 (fi)
-     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 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 (ip)
-     CORE_ADDR ip;	/* ip from currently executing function	*/
-{
-  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 (frame)
-     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
-pop_frame ()
-{
-  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++)
-    {
-      if (save_addr = fsr.regs[i])
-	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 (fault)
-    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;
-};
-
-static int				/* returns instruction length: 4 or 8 */
-mem( memaddr, word1, word2, noprint )
-    unsigned long memaddr;
-    unsigned long word1, word2;
-    int noprint;		/* If TRUE, return instruction length, but
-				   don't output any text.  */
-{
-	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;
-	}
-	abort ();
-}
-
-/* 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 (memaddr, pword1, pword2)
-     unsigned int *pword1, *pword2;
-     CORE_ADDR memaddr;
-{
-  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 (chain, curframe)
-    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 ()
-{
-  check_host ();
-
-  tm_print_insn = print_insn_i960;
-}