Obsolete tic80.

1 files changed, 468 insertions, 468 deletions

diff --git a/gdb/tic80-tdep.c b/gdb/tic80-tdep.c
index f334eea..3454576 100644
--- a/gdb/tic80-tdep.c
+++ b/gdb/tic80-tdep.c
@@ -1,468 +1,468 @@
-/* Target-dependent code for the TI TMS320C80 (MVP) for GDB, the GNU debugger.
-   Copyright 1996, 1997, 1999, 2000, 2001 Free Software Foundation, Inc.
-
-   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 "value.h"
-#include "frame.h"
-#include "inferior.h"
-#include "obstack.h"
-#include "target.h"
-#include "bfd.h"
-#include "gdb_string.h"
-#include "gdbcore.h"
-#include "symfile.h"
-#include "regcache.h"
-
-/* Function: frame_find_saved_regs
-   Return the frame_saved_regs structure for the frame.
-   Doesn't really work for dummy frames, but it does pass back
-   an empty frame_saved_regs, so I guess that's better than total failure */
-
-void
-tic80_frame_find_saved_regs (struct frame_info *fi,
-			     struct frame_saved_regs *regaddr)
-{
-  memcpy (regaddr, &fi->fsr, sizeof (struct frame_saved_regs));
-}
-
-/* Function: skip_prologue
-   Find end of function prologue.  */
-
-CORE_ADDR
-tic80_skip_prologue (CORE_ADDR pc)
-{
-  CORE_ADDR func_addr, func_end;
-  struct symtab_and_line sal;
-
-  /* See what the symbol table says */
-
-  if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
-    {
-      sal = find_pc_line (func_addr, 0);
-
-      if (sal.line != 0 && sal.end < func_end)
-	return sal.end;
-      else
-	/* Either there's no line info, or the line after the prologue is after
-	   the end of the function.  In this case, there probably isn't a
-	   prologue.  */
-	return pc;
-    }
-
-  /* We can't find the start of this function, so there's nothing we can do. */
-  return pc;
-}
-
-/* Function: tic80_scan_prologue
-   This function decodes the target function prologue to determine:
-   1) the size of the stack frame
-   2) which registers are saved on it
-   3) the offsets of saved regs
-   4) the frame size
-   This information is stored in the "extra" fields of the frame_info.  */
-
-static void
-tic80_scan_prologue (struct frame_info *fi)
-{
-  struct symtab_and_line sal;
-  CORE_ADDR prologue_start, prologue_end, current_pc;
-
-  /* Assume there is no frame until proven otherwise.  */
-  fi->framereg = SP_REGNUM;
-  fi->framesize = 0;
-  fi->frameoffset = 0;
-
-  /* this code essentially duplicates skip_prologue, 
-     but we need the start address below.  */
-
-  if (find_pc_partial_function (fi->pc, NULL, &prologue_start, &prologue_end))
-    {
-      sal = find_pc_line (prologue_start, 0);
-
-      if (sal.line == 0)	/* no line info, use current PC */
-	if (prologue_start != entry_point_address ())
-	  prologue_end = fi->pc;
-	else
-	  return;		/* _start has no frame or prologue */
-      else if (sal.end < prologue_end)	/* next line begins after fn end */
-	prologue_end = sal.end;	/* (probably means no prologue)  */
-    }
-  else
-/* FIXME */
-    prologue_end = prologue_start + 40;		/* We're in the boondocks: allow for */
-  /* 16 pushes, an add, and "mv fp,sp" */
-
-  prologue_end = min (prologue_end, fi->pc);
-
-  /* Now search the prologue looking for instructions that set up the
-     frame pointer, adjust the stack pointer, and save registers.  */
-
-  for (current_pc = prologue_start; current_pc < prologue_end; current_pc += 4)
-    {
-      unsigned int insn;
-      int regno;
-      int offset = 0;
-
-      insn = read_memory_unsigned_integer (current_pc, 4);
-
-      if ((insn & 0x301000) == 0x301000)	/* Long immediate? */
-/* FIXME - set offset for long immediate instructions */
-	current_pc += 4;
-      else
-	{
-	  offset = insn & 0x7fff;	/* extract 15-bit offset */
-	  if (offset & 0x4000)	/* if negative, sign-extend */
-	    offset = -(0x8000 - offset);
-	}
-
-      if ((insn & 0x7fd0000) == 0x590000)	/* st.{w,d} reg, xx(r1) */
-	{
-	  regno = ((insn >> 27) & 0x1f);
-	  fi->fsr.regs[regno] = offset;
-	  if (insn & 0x8000)	/* 64-bit store (st.d)? */
-	    fi->fsr.regs[regno + 1] = offset + 4;
-	}
-      else if ((insn & 0xffff8000) == 0x086c8000)	/* addu xx, r1, r1 */
-	fi->framesize = -offset;
-      else if ((insn & 0xffff8000) == 0xf06c8000)	/* addu xx, r1, r30 */
-	{
-	  fi->framereg = FP_REGNUM;	/* fp is now valid */
-	  fi->frameoffset = offset;
-	  break;		/* end of stack adjustments */
-	}
-      else if (insn == 0xf03b2001)	/* addu r1, r0, r30 */
-	{
-	  fi->framereg = FP_REGNUM;	/* fp is now valid */
-	  fi->frameoffset = 0;
-	  break;		/* end of stack adjustments */
-	}
-      else
-/* FIXME - handle long immediate instructions */
-	break;			/* anything else isn't prologue */
-    }
-}
-
-/* Function: init_extra_frame_info
-   This function actually figures out the frame address for a given pc and
-   sp.  This is tricky on the c80 because we sometimes don't use an explicit
-   frame pointer, and the previous stack pointer isn't necessarily recorded
-   on the stack.  The only reliable way to get this info is to
-   examine the prologue.  */
-
-void
-tic80_init_extra_frame_info (struct frame_info *fi)
-{
-  int reg;
-
-  if (fi->next)
-    fi->pc = FRAME_SAVED_PC (fi->next);
-
-  /* Because zero is a valid register offset relative to SP, we initialize
-     the offsets to -1 to indicate unused entries.  */
-  for (reg = 0; reg < NUM_REGS; reg++)
-    fi->fsr.regs[reg] = -1;
-
-  if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
-    {
-      /* We need to setup fi->frame here because run_stack_dummy gets it wrong
-         by assuming it's always FP.  */
-      fi->frame = generic_read_register_dummy (fi->pc, fi->frame, SP_REGNUM);
-      fi->framesize = 0;
-      fi->frameoffset = 0;
-      return;
-    }
-  else
-    {
-      tic80_scan_prologue (fi);
-
-      if (!fi->next)		/* this is the innermost frame? */
-	fi->frame = read_register (fi->framereg);
-      else
-	/* not the innermost frame */
-	/* If this function uses FP as the frame register, and the function
-	   it called saved the FP, get the saved FP.  */ if (fi->framereg == FP_REGNUM &&
-			     fi->next->fsr.regs[FP_REGNUM] != (unsigned) -1)
-	fi->frame = read_memory_integer (fi->next->fsr.regs[FP_REGNUM], 4);
-
-      /* Convert SP-relative offsets of saved registers to real addresses.  */
-      for (reg = 0; reg < NUM_REGS; reg++)
-	if (fi->fsr.regs[reg] == (unsigned) -1)
-	  fi->fsr.regs[reg] = 0;	/* unused entry */
-	else
-	  fi->fsr.regs[reg] += fi->frame - fi->frameoffset;
-    }
-}
-
-/* Function: find_callers_reg
-   Find REGNUM on the stack.  Otherwise, it's in an active register.  One thing
-   we might want to do here is to check REGNUM against the clobber mask, and
-   somehow flag it as invalid if it isn't saved on the stack somewhere.  This
-   would provide a graceful failure mode when trying to get the value of
-   caller-saves registers for an inner frame.  */
-
-CORE_ADDR
-tic80_find_callers_reg (struct frame_info *fi, int regnum)
-{
-  for (; fi; fi = fi->next)
-    if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
-      return generic_read_register_dummy (fi->pc, fi->frame, regnum);
-    else if (fi->fsr.regs[regnum] != 0)
-      return read_memory_integer (fi->fsr.regs[regnum],
-				  REGISTER_RAW_SIZE (regnum));
-  return read_register (regnum);
-}
-
-/* Function: frame_chain
-   Given a GDB frame, determine the address of the calling function's frame.
-   This will be used to create a new GDB frame struct, and then
-   INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
-   For c80, we save the frame size when we initialize the frame_info.  */
-
-CORE_ADDR
-tic80_frame_chain (struct frame_info *fi)
-{
-  CORE_ADDR fn_start, callers_pc, fp;
-
-  /* is this a dummy frame? */
-  if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
-    return fi->frame;		/* dummy frame same as caller's frame */
-
-  /* is caller-of-this a dummy frame? */
-  callers_pc = FRAME_SAVED_PC (fi);	/* find out who called us: */
-  fp = tic80_find_callers_reg (fi, FP_REGNUM);
-  if (PC_IN_CALL_DUMMY (callers_pc, fp, fp))
-    return fp;			/* dummy frame's frame may bear no relation to ours */
-
-  if (find_pc_partial_function (fi->pc, 0, &fn_start, 0))
-    if (fn_start == entry_point_address ())
-      return 0;			/* in _start fn, don't chain further */
-
-  if (fi->framereg == FP_REGNUM)
-    return tic80_find_callers_reg (fi, FP_REGNUM);
-  else
-    return fi->frame + fi->framesize;
-}
-
-/* Function: pop_frame
-   Discard from the stack the innermost frame,
-   restoring all saved registers.  */
-
-struct frame_info *
-tic80_pop_frame (struct frame_info *frame)
-{
-  int regnum;
-
-  if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
-    generic_pop_dummy_frame ();
-  else
-    {
-      for (regnum = 0; regnum < NUM_REGS; regnum++)
-	if (frame->fsr.regs[regnum] != 0)
-	  write_register (regnum,
-			  read_memory_integer (frame->fsr.regs[regnum], 4));
-
-      write_register (PC_REGNUM, FRAME_SAVED_PC (frame));
-      write_register (SP_REGNUM, read_register (FP_REGNUM));
-#if 0
-      if (read_register (PSW_REGNUM) & 0x80)
-	write_register (SPU_REGNUM, read_register (SP_REGNUM));
-      else
-	write_register (SPI_REGNUM, read_register (SP_REGNUM));
-#endif
-    }
-  flush_cached_frames ();
-  return NULL;
-}
-
-/* Function: frame_saved_pc
-   Find the caller of this frame.  We do this by seeing if LR_REGNUM is saved
-   in the stack anywhere, otherwise we get it from the registers. */
-
-CORE_ADDR
-tic80_frame_saved_pc (struct frame_info *fi)
-{
-  if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
-    return generic_read_register_dummy (fi->pc, fi->frame, PC_REGNUM);
-  else
-    return tic80_find_callers_reg (fi, LR_REGNUM);
-}
-
-/* Function: tic80_push_return_address (pc, sp)
-   Set up the return address for the inferior function call.
-   Necessary for targets that don't actually execute a JSR/BSR instruction 
-   (ie. when using an empty CALL_DUMMY) */
-
-CORE_ADDR
-tic80_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
-{
-  write_register (LR_REGNUM, CALL_DUMMY_ADDRESS ());
-  return sp;
-}
-
-
-/* Function: push_arguments
-   Setup the function arguments for calling a function in the inferior.
-
-   On the TI C80 architecture, there are six register pairs (R2/R3 to R12/13)
-   which are dedicated for passing function arguments.  Up to the first six
-   arguments (depending on size) may go into these registers.
-   The rest go on the stack.
-
-   Arguments that are smaller than 4 bytes will still take up a whole
-   register or a whole 32-bit word on the stack, and will be
-   right-justified in the register or the stack word.  This includes
-   chars, shorts, and small aggregate types.
-
-   Arguments that are four bytes or less in size are placed in the
-   even-numbered register of a register pair, and the odd-numbered
-   register is not used.
-
-   Arguments of 8 bytes size (such as floating point doubles) are placed
-   in a register pair.  The least significant 32-bit word is placed in
-   the even-numbered register, and the most significant word in the
-   odd-numbered register.
-
-   Aggregate types with sizes between 4 and 8 bytes are passed
-   entirely on the stack, and are left-justified within the
-   double-word (as opposed to aggregates smaller than 4 bytes
-   which are right-justified).
-
-   Aggregates of greater than 8 bytes are first copied onto the stack, 
-   and then a pointer to the copy is passed in the place of the normal
-   argument (either in a register if available, or on the stack).
-
-   Functions that must return an aggregate type can return it in the 
-   normal return value registers (R2 and R3) if its size is 8 bytes or
-   less.  For larger return values, the caller must allocate space for 
-   the callee to copy the return value to.  A pointer to this space is
-   passed as an implicit first argument, always in R0. */
-
-CORE_ADDR
-tic80_push_arguments (int nargs, value_ptr *args, CORE_ADDR sp,
-		      unsigned char struct_return, CORE_ADDR struct_addr)
-{
-  int stack_offset, stack_alloc;
-  int argreg;
-  int argnum;
-  struct type *type;
-  CORE_ADDR regval;
-  char *val;
-  char valbuf[4];
-  int len;
-  int odd_sized_struct;
-  int is_struct;
-
-  /* first force sp to a 4-byte alignment */
-  sp = sp & ~3;
-
-  argreg = ARG0_REGNUM;
-  /* The "struct return pointer" pseudo-argument goes in R0 */
-  if (struct_return)
-    write_register (argreg++, struct_addr);
-
-  /* Now make sure there's space on the stack */
-  for (argnum = 0, stack_alloc = 0;
-       argnum < nargs; argnum++)
-    stack_alloc += ((TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3);
-  sp -= stack_alloc;		/* make room on stack for args */
-
-
-  /* Now load as many as possible of the first arguments into
-     registers, and push the rest onto the stack.  There are 16 bytes
-     in four registers available.  Loop thru args from first to last.  */
-
-  argreg = ARG0_REGNUM;
-  for (argnum = 0, stack_offset = 0; argnum < nargs; argnum++)
-    {
-      type = VALUE_TYPE (args[argnum]);
-      len = TYPE_LENGTH (type);
-      memset (valbuf, 0, sizeof (valbuf));
-      val = (char *) VALUE_CONTENTS (args[argnum]);
-
-/* FIXME -- tic80 can take doubleword arguments in register pairs */
-      is_struct = (type->code == TYPE_CODE_STRUCT);
-      odd_sized_struct = 0;
-
-      if (!is_struct)
-	{
-	  if (len < 4)
-	    {			/* value gets right-justified in the register or stack word */
-	      memcpy (valbuf + (4 - len), val, len);
-	      val = valbuf;
-	    }
-	  if (len > 4 && (len & 3) != 0)
-	    odd_sized_struct = 1;	/* such structs go entirely on stack */
-	}
-      else
-	{
-	  /* Structs are always passed by reference. */
-	  write_register (argreg, sp + stack_offset);
-	  argreg++;
-	}
-
-      while (len > 0)
-	{
-	  if (is_struct || argreg > ARGLAST_REGNUM || odd_sized_struct)
-	    {			/* must go on the stack */
-	      write_memory (sp + stack_offset, val, 4);
-	      stack_offset += 4;
-	    }
-	  /* NOTE WELL!!!!!  This is not an "else if" clause!!!
-	     That's because some things get passed on the stack
-	     AND in the registers!   */
-	  if (!is_struct && argreg <= ARGLAST_REGNUM)
-	    {			/* there's room in a register */
-	      regval = extract_address (val, REGISTER_RAW_SIZE (argreg));
-	      write_register (argreg, regval);
-	      argreg += 2;	/* FIXME -- what about doubleword args? */
-	    }
-	  /* Store the value 4 bytes at a time.  This means that things
-	     larger than 4 bytes may go partly in registers and partly
-	     on the stack.  */
-	  len -= REGISTER_RAW_SIZE (argreg);
-	  val += REGISTER_RAW_SIZE (argreg);
-	}
-    }
-  return sp;
-}
-
-/* Function: tic80_write_sp
-   Because SP is really a read-only register that mirrors either SPU or SPI,
-   we must actually write one of those two as well, depending on PSW. */
-
-void
-tic80_write_sp (CORE_ADDR val)
-{
-#if 0
-  unsigned long psw = read_register (PSW_REGNUM);
-
-  if (psw & 0x80)		/* stack mode: user or interrupt */
-    write_register (SPU_REGNUM, val);
-  else
-    write_register (SPI_REGNUM, val);
-#endif
-  write_register (SP_REGNUM, val);
-}
-
-void
-_initialize_tic80_tdep (void)
-{
-  tm_print_insn = print_insn_tic80;
-}
+/* OBSOLETE /* Target-dependent code for the TI TMS320C80 (MVP) for GDB, the GNU debugger. */
+/* OBSOLETE    Copyright 1996, 1997, 1999, 2000, 2001 Free Software Foundation, Inc. */
+/* 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 "value.h" */
+/* OBSOLETE #include "frame.h" */
+/* OBSOLETE #include "inferior.h" */
+/* OBSOLETE #include "obstack.h" */
+/* OBSOLETE #include "target.h" */
+/* OBSOLETE #include "bfd.h" */
+/* OBSOLETE #include "gdb_string.h" */
+/* OBSOLETE #include "gdbcore.h" */
+/* OBSOLETE #include "symfile.h" */
+/* OBSOLETE #include "regcache.h" */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: frame_find_saved_regs */
+/* OBSOLETE    Return the frame_saved_regs structure for the frame. */
+/* OBSOLETE    Doesn't really work for dummy frames, but it does pass back */
+/* OBSOLETE    an empty frame_saved_regs, so I guess that's better than total failure */ */
+/* OBSOLETE  */
+/* OBSOLETE void */
+/* OBSOLETE tic80_frame_find_saved_regs (struct frame_info *fi, */
+/* OBSOLETE 			     struct frame_saved_regs *regaddr) */
+/* OBSOLETE { */
+/* OBSOLETE   memcpy (regaddr, &fi->fsr, sizeof (struct frame_saved_regs)); */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: skip_prologue */
+/* OBSOLETE    Find end of function prologue.  */ */
+/* OBSOLETE  */
+/* OBSOLETE CORE_ADDR */
+/* OBSOLETE tic80_skip_prologue (CORE_ADDR pc) */
+/* OBSOLETE { */
+/* OBSOLETE   CORE_ADDR func_addr, func_end; */
+/* OBSOLETE   struct symtab_and_line sal; */
+/* OBSOLETE  */
+/* OBSOLETE   /* See what the symbol table says */ */
+/* OBSOLETE  */
+/* OBSOLETE   if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) */
+/* OBSOLETE     { */
+/* OBSOLETE       sal = find_pc_line (func_addr, 0); */
+/* OBSOLETE  */
+/* OBSOLETE       if (sal.line != 0 && sal.end < func_end) */
+/* OBSOLETE 	return sal.end; */
+/* OBSOLETE       else */
+/* OBSOLETE 	/* Either there's no line info, or the line after the prologue is after */
+/* OBSOLETE 	   the end of the function.  In this case, there probably isn't a */
+/* OBSOLETE 	   prologue.  */ */
+/* OBSOLETE 	return pc; */
+/* OBSOLETE     } */
+/* OBSOLETE  */
+/* OBSOLETE   /* We can't find the start of this function, so there's nothing we can do. */ */
+/* OBSOLETE   return pc; */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: tic80_scan_prologue */
+/* OBSOLETE    This function decodes the target function prologue to determine: */
+/* OBSOLETE    1) the size of the stack frame */
+/* OBSOLETE    2) which registers are saved on it */
+/* OBSOLETE    3) the offsets of saved regs */
+/* OBSOLETE    4) the frame size */
+/* OBSOLETE    This information is stored in the "extra" fields of the frame_info.  */ */
+/* OBSOLETE  */
+/* OBSOLETE static void */
+/* OBSOLETE tic80_scan_prologue (struct frame_info *fi) */
+/* OBSOLETE { */
+/* OBSOLETE   struct symtab_and_line sal; */
+/* OBSOLETE   CORE_ADDR prologue_start, prologue_end, current_pc; */
+/* OBSOLETE  */
+/* OBSOLETE   /* Assume there is no frame until proven otherwise.  */ */
+/* OBSOLETE   fi->framereg = SP_REGNUM; */
+/* OBSOLETE   fi->framesize = 0; */
+/* OBSOLETE   fi->frameoffset = 0; */
+/* OBSOLETE  */
+/* OBSOLETE   /* this code essentially duplicates skip_prologue,  */
+/* OBSOLETE      but we need the start address below.  */ */
+/* OBSOLETE  */
+/* OBSOLETE   if (find_pc_partial_function (fi->pc, NULL, &prologue_start, &prologue_end)) */
+/* OBSOLETE     { */
+/* OBSOLETE       sal = find_pc_line (prologue_start, 0); */
+/* OBSOLETE  */
+/* OBSOLETE       if (sal.line == 0)	/* no line info, use current PC */ */
+/* OBSOLETE 	if (prologue_start != entry_point_address ()) */
+/* OBSOLETE 	  prologue_end = fi->pc; */
+/* OBSOLETE 	else */
+/* OBSOLETE 	  return;		/* _start has no frame or prologue */ */
+/* OBSOLETE       else if (sal.end < prologue_end)	/* next line begins after fn end */ */
+/* OBSOLETE 	prologue_end = sal.end;	/* (probably means no prologue)  */ */
+/* OBSOLETE     } */
+/* OBSOLETE   else */
+/* OBSOLETE /* FIXME */ */
+/* OBSOLETE     prologue_end = prologue_start + 40;		/* We're in the boondocks: allow for */ */
+/* OBSOLETE   /* 16 pushes, an add, and "mv fp,sp" */ */
+/* OBSOLETE  */
+/* OBSOLETE   prologue_end = min (prologue_end, fi->pc); */
+/* OBSOLETE  */
+/* OBSOLETE   /* Now search the prologue looking for instructions that set up the */
+/* OBSOLETE      frame pointer, adjust the stack pointer, and save registers.  */ */
+/* OBSOLETE  */
+/* OBSOLETE   for (current_pc = prologue_start; current_pc < prologue_end; current_pc += 4) */
+/* OBSOLETE     { */
+/* OBSOLETE       unsigned int insn; */
+/* OBSOLETE       int regno; */
+/* OBSOLETE       int offset = 0; */
+/* OBSOLETE  */
+/* OBSOLETE       insn = read_memory_unsigned_integer (current_pc, 4); */
+/* OBSOLETE  */
+/* OBSOLETE       if ((insn & 0x301000) == 0x301000)	/* Long immediate? */ */
+/* OBSOLETE /* FIXME - set offset for long immediate instructions */ */
+/* OBSOLETE 	current_pc += 4; */
+/* OBSOLETE       else */
+/* OBSOLETE 	{ */
+/* OBSOLETE 	  offset = insn & 0x7fff;	/* extract 15-bit offset */ */
+/* OBSOLETE 	  if (offset & 0x4000)	/* if negative, sign-extend */ */
+/* OBSOLETE 	    offset = -(0x8000 - offset); */
+/* OBSOLETE 	} */
+/* OBSOLETE  */
+/* OBSOLETE       if ((insn & 0x7fd0000) == 0x590000)	/* st.{w,d} reg, xx(r1) */ */
+/* OBSOLETE 	{ */
+/* OBSOLETE 	  regno = ((insn >> 27) & 0x1f); */
+/* OBSOLETE 	  fi->fsr.regs[regno] = offset; */
+/* OBSOLETE 	  if (insn & 0x8000)	/* 64-bit store (st.d)? */ */
+/* OBSOLETE 	    fi->fsr.regs[regno + 1] = offset + 4; */
+/* OBSOLETE 	} */
+/* OBSOLETE       else if ((insn & 0xffff8000) == 0x086c8000)	/* addu xx, r1, r1 */ */
+/* OBSOLETE 	fi->framesize = -offset; */
+/* OBSOLETE       else if ((insn & 0xffff8000) == 0xf06c8000)	/* addu xx, r1, r30 */ */
+/* OBSOLETE 	{ */
+/* OBSOLETE 	  fi->framereg = FP_REGNUM;	/* fp is now valid */ */
+/* OBSOLETE 	  fi->frameoffset = offset; */
+/* OBSOLETE 	  break;		/* end of stack adjustments */ */
+/* OBSOLETE 	} */
+/* OBSOLETE       else if (insn == 0xf03b2001)	/* addu r1, r0, r30 */ */
+/* OBSOLETE 	{ */
+/* OBSOLETE 	  fi->framereg = FP_REGNUM;	/* fp is now valid */ */
+/* OBSOLETE 	  fi->frameoffset = 0; */
+/* OBSOLETE 	  break;		/* end of stack adjustments */ */
+/* OBSOLETE 	} */
+/* OBSOLETE       else */
+/* OBSOLETE /* FIXME - handle long immediate instructions */ */
+/* OBSOLETE 	break;			/* anything else isn't prologue */ */
+/* OBSOLETE     } */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: init_extra_frame_info */
+/* OBSOLETE    This function actually figures out the frame address for a given pc and */
+/* OBSOLETE    sp.  This is tricky on the c80 because we sometimes don't use an explicit */
+/* OBSOLETE    frame pointer, and the previous stack pointer isn't necessarily recorded */
+/* OBSOLETE    on the stack.  The only reliable way to get this info is to */
+/* OBSOLETE    examine the prologue.  */ */
+/* OBSOLETE  */
+/* OBSOLETE void */
+/* OBSOLETE tic80_init_extra_frame_info (struct frame_info *fi) */
+/* OBSOLETE { */
+/* OBSOLETE   int reg; */
+/* OBSOLETE  */
+/* OBSOLETE   if (fi->next) */
+/* OBSOLETE     fi->pc = FRAME_SAVED_PC (fi->next); */
+/* OBSOLETE  */
+/* OBSOLETE   /* Because zero is a valid register offset relative to SP, we initialize */
+/* OBSOLETE      the offsets to -1 to indicate unused entries.  */ */
+/* OBSOLETE   for (reg = 0; reg < NUM_REGS; reg++) */
+/* OBSOLETE     fi->fsr.regs[reg] = -1; */
+/* OBSOLETE  */
+/* OBSOLETE   if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) */
+/* OBSOLETE     { */
+/* OBSOLETE       /* We need to setup fi->frame here because run_stack_dummy gets it wrong */
+/* OBSOLETE          by assuming it's always FP.  */ */
+/* OBSOLETE       fi->frame = generic_read_register_dummy (fi->pc, fi->frame, SP_REGNUM); */
+/* OBSOLETE       fi->framesize = 0; */
+/* OBSOLETE       fi->frameoffset = 0; */
+/* OBSOLETE       return; */
+/* OBSOLETE     } */
+/* OBSOLETE   else */
+/* OBSOLETE     { */
+/* OBSOLETE       tic80_scan_prologue (fi); */
+/* OBSOLETE  */
+/* OBSOLETE       if (!fi->next)		/* this is the innermost frame? */ */
+/* OBSOLETE 	fi->frame = read_register (fi->framereg); */
+/* OBSOLETE       else */
+/* OBSOLETE 	/* not the innermost frame */ */
+/* OBSOLETE 	/* If this function uses FP as the frame register, and the function */
+/* OBSOLETE 	   it called saved the FP, get the saved FP.  */ if (fi->framereg == FP_REGNUM && */
+/* OBSOLETE 			     fi->next->fsr.regs[FP_REGNUM] != (unsigned) -1) */
+/* OBSOLETE 	fi->frame = read_memory_integer (fi->next->fsr.regs[FP_REGNUM], 4); */
+/* OBSOLETE  */
+/* OBSOLETE       /* Convert SP-relative offsets of saved registers to real addresses.  */ */
+/* OBSOLETE       for (reg = 0; reg < NUM_REGS; reg++) */
+/* OBSOLETE 	if (fi->fsr.regs[reg] == (unsigned) -1) */
+/* OBSOLETE 	  fi->fsr.regs[reg] = 0;	/* unused entry */ */
+/* OBSOLETE 	else */
+/* OBSOLETE 	  fi->fsr.regs[reg] += fi->frame - fi->frameoffset; */
+/* OBSOLETE     } */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: find_callers_reg */
+/* OBSOLETE    Find REGNUM on the stack.  Otherwise, it's in an active register.  One thing */
+/* OBSOLETE    we might want to do here is to check REGNUM against the clobber mask, and */
+/* OBSOLETE    somehow flag it as invalid if it isn't saved on the stack somewhere.  This */
+/* OBSOLETE    would provide a graceful failure mode when trying to get the value of */
+/* OBSOLETE    caller-saves registers for an inner frame.  */ */
+/* OBSOLETE  */
+/* OBSOLETE CORE_ADDR */
+/* OBSOLETE tic80_find_callers_reg (struct frame_info *fi, int regnum) */
+/* OBSOLETE { */
+/* OBSOLETE   for (; fi; fi = fi->next) */
+/* OBSOLETE     if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) */
+/* OBSOLETE       return generic_read_register_dummy (fi->pc, fi->frame, regnum); */
+/* OBSOLETE     else if (fi->fsr.regs[regnum] != 0) */
+/* OBSOLETE       return read_memory_integer (fi->fsr.regs[regnum], */
+/* OBSOLETE 				  REGISTER_RAW_SIZE (regnum)); */
+/* OBSOLETE   return read_register (regnum); */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: frame_chain */
+/* OBSOLETE    Given a GDB frame, determine the address of the calling function's frame. */
+/* OBSOLETE    This will be used to create a new GDB frame struct, and then */
+/* OBSOLETE    INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame. */
+/* OBSOLETE    For c80, we save the frame size when we initialize the frame_info.  */ */
+/* OBSOLETE  */
+/* OBSOLETE CORE_ADDR */
+/* OBSOLETE tic80_frame_chain (struct frame_info *fi) */
+/* OBSOLETE { */
+/* OBSOLETE   CORE_ADDR fn_start, callers_pc, fp; */
+/* OBSOLETE  */
+/* OBSOLETE   /* is this a dummy frame? */ */
+/* OBSOLETE   if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) */
+/* OBSOLETE     return fi->frame;		/* dummy frame same as caller's frame */ */
+/* OBSOLETE  */
+/* OBSOLETE   /* is caller-of-this a dummy frame? */ */
+/* OBSOLETE   callers_pc = FRAME_SAVED_PC (fi);	/* find out who called us: */ */
+/* OBSOLETE   fp = tic80_find_callers_reg (fi, FP_REGNUM); */
+/* OBSOLETE   if (PC_IN_CALL_DUMMY (callers_pc, fp, fp)) */
+/* OBSOLETE     return fp;			/* dummy frame's frame may bear no relation to ours */ */
+/* OBSOLETE  */
+/* OBSOLETE   if (find_pc_partial_function (fi->pc, 0, &fn_start, 0)) */
+/* OBSOLETE     if (fn_start == entry_point_address ()) */
+/* OBSOLETE       return 0;			/* in _start fn, don't chain further */ */
+/* OBSOLETE  */
+/* OBSOLETE   if (fi->framereg == FP_REGNUM) */
+/* OBSOLETE     return tic80_find_callers_reg (fi, FP_REGNUM); */
+/* OBSOLETE   else */
+/* OBSOLETE     return fi->frame + fi->framesize; */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: pop_frame */
+/* OBSOLETE    Discard from the stack the innermost frame, */
+/* OBSOLETE    restoring all saved registers.  */ */
+/* OBSOLETE  */
+/* OBSOLETE struct frame_info * */
+/* OBSOLETE tic80_pop_frame (struct frame_info *frame) */
+/* OBSOLETE { */
+/* OBSOLETE   int regnum; */
+/* OBSOLETE  */
+/* OBSOLETE   if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) */
+/* OBSOLETE     generic_pop_dummy_frame (); */
+/* OBSOLETE   else */
+/* OBSOLETE     { */
+/* OBSOLETE       for (regnum = 0; regnum < NUM_REGS; regnum++) */
+/* OBSOLETE 	if (frame->fsr.regs[regnum] != 0) */
+/* OBSOLETE 	  write_register (regnum, */
+/* OBSOLETE 			  read_memory_integer (frame->fsr.regs[regnum], 4)); */
+/* OBSOLETE  */
+/* OBSOLETE       write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); */
+/* OBSOLETE       write_register (SP_REGNUM, read_register (FP_REGNUM)); */
+/* OBSOLETE #if 0 */
+/* OBSOLETE       if (read_register (PSW_REGNUM) & 0x80) */
+/* OBSOLETE 	write_register (SPU_REGNUM, read_register (SP_REGNUM)); */
+/* OBSOLETE       else */
+/* OBSOLETE 	write_register (SPI_REGNUM, read_register (SP_REGNUM)); */
+/* OBSOLETE #endif */
+/* OBSOLETE     } */
+/* OBSOLETE   flush_cached_frames (); */
+/* OBSOLETE   return NULL; */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: frame_saved_pc */
+/* OBSOLETE    Find the caller of this frame.  We do this by seeing if LR_REGNUM is saved */
+/* OBSOLETE    in the stack anywhere, otherwise we get it from the registers. */ */
+/* OBSOLETE  */
+/* OBSOLETE CORE_ADDR */
+/* OBSOLETE tic80_frame_saved_pc (struct frame_info *fi) */
+/* OBSOLETE { */
+/* OBSOLETE   if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) */
+/* OBSOLETE     return generic_read_register_dummy (fi->pc, fi->frame, PC_REGNUM); */
+/* OBSOLETE   else */
+/* OBSOLETE     return tic80_find_callers_reg (fi, LR_REGNUM); */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: tic80_push_return_address (pc, sp) */
+/* OBSOLETE    Set up the return address for the inferior function call. */
+/* OBSOLETE    Necessary for targets that don't actually execute a JSR/BSR instruction  */
+/* OBSOLETE    (ie. when using an empty CALL_DUMMY) */ */
+/* OBSOLETE  */
+/* OBSOLETE CORE_ADDR */
+/* OBSOLETE tic80_push_return_address (CORE_ADDR pc, CORE_ADDR sp) */
+/* OBSOLETE { */
+/* OBSOLETE   write_register (LR_REGNUM, CALL_DUMMY_ADDRESS ()); */
+/* OBSOLETE   return sp; */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: push_arguments */
+/* OBSOLETE    Setup the function arguments for calling a function in the inferior. */
+/* OBSOLETE  */
+/* OBSOLETE    On the TI C80 architecture, there are six register pairs (R2/R3 to R12/13) */
+/* OBSOLETE    which are dedicated for passing function arguments.  Up to the first six */
+/* OBSOLETE    arguments (depending on size) may go into these registers. */
+/* OBSOLETE    The rest go on the stack. */
+/* OBSOLETE  */
+/* OBSOLETE    Arguments that are smaller than 4 bytes will still take up a whole */
+/* OBSOLETE    register or a whole 32-bit word on the stack, and will be */
+/* OBSOLETE    right-justified in the register or the stack word.  This includes */
+/* OBSOLETE    chars, shorts, and small aggregate types. */
+/* OBSOLETE  */
+/* OBSOLETE    Arguments that are four bytes or less in size are placed in the */
+/* OBSOLETE    even-numbered register of a register pair, and the odd-numbered */
+/* OBSOLETE    register is not used. */
+/* OBSOLETE  */
+/* OBSOLETE    Arguments of 8 bytes size (such as floating point doubles) are placed */
+/* OBSOLETE    in a register pair.  The least significant 32-bit word is placed in */
+/* OBSOLETE    the even-numbered register, and the most significant word in the */
+/* OBSOLETE    odd-numbered register. */
+/* OBSOLETE  */
+/* OBSOLETE    Aggregate types with sizes between 4 and 8 bytes are passed */
+/* OBSOLETE    entirely on the stack, and are left-justified within the */
+/* OBSOLETE    double-word (as opposed to aggregates smaller than 4 bytes */
+/* OBSOLETE    which are right-justified). */
+/* OBSOLETE  */
+/* OBSOLETE    Aggregates of greater than 8 bytes are first copied onto the stack,  */
+/* OBSOLETE    and then a pointer to the copy is passed in the place of the normal */
+/* OBSOLETE    argument (either in a register if available, or on the stack). */
+/* OBSOLETE  */
+/* OBSOLETE    Functions that must return an aggregate type can return it in the  */
+/* OBSOLETE    normal return value registers (R2 and R3) if its size is 8 bytes or */
+/* OBSOLETE    less.  For larger return values, the caller must allocate space for  */
+/* OBSOLETE    the callee to copy the return value to.  A pointer to this space is */
+/* OBSOLETE    passed as an implicit first argument, always in R0. */ */
+/* OBSOLETE  */
+/* OBSOLETE CORE_ADDR */
+/* OBSOLETE tic80_push_arguments (int nargs, value_ptr *args, CORE_ADDR sp, */
+/* OBSOLETE 		      unsigned char struct_return, CORE_ADDR struct_addr) */
+/* OBSOLETE { */
+/* OBSOLETE   int stack_offset, stack_alloc; */
+/* OBSOLETE   int argreg; */
+/* OBSOLETE   int argnum; */
+/* OBSOLETE   struct type *type; */
+/* OBSOLETE   CORE_ADDR regval; */
+/* OBSOLETE   char *val; */
+/* OBSOLETE   char valbuf[4]; */
+/* OBSOLETE   int len; */
+/* OBSOLETE   int odd_sized_struct; */
+/* OBSOLETE   int is_struct; */
+/* OBSOLETE  */
+/* OBSOLETE   /* first force sp to a 4-byte alignment */ */
+/* OBSOLETE   sp = sp & ~3; */
+/* OBSOLETE  */
+/* OBSOLETE   argreg = ARG0_REGNUM; */
+/* OBSOLETE   /* The "struct return pointer" pseudo-argument goes in R0 */ */
+/* OBSOLETE   if (struct_return) */
+/* OBSOLETE     write_register (argreg++, struct_addr); */
+/* OBSOLETE  */
+/* OBSOLETE   /* Now make sure there's space on the stack */ */
+/* OBSOLETE   for (argnum = 0, stack_alloc = 0; */
+/* OBSOLETE        argnum < nargs; argnum++) */
+/* OBSOLETE     stack_alloc += ((TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3); */
+/* OBSOLETE   sp -= stack_alloc;		/* make room on stack for args */ */
+/* OBSOLETE  */
+/* OBSOLETE  */
+/* OBSOLETE   /* Now load as many as possible of the first arguments into */
+/* OBSOLETE      registers, and push the rest onto the stack.  There are 16 bytes */
+/* OBSOLETE      in four registers available.  Loop thru args from first to last.  */ */
+/* OBSOLETE  */
+/* OBSOLETE   argreg = ARG0_REGNUM; */
+/* OBSOLETE   for (argnum = 0, stack_offset = 0; argnum < nargs; argnum++) */
+/* OBSOLETE     { */
+/* OBSOLETE       type = VALUE_TYPE (args[argnum]); */
+/* OBSOLETE       len = TYPE_LENGTH (type); */
+/* OBSOLETE       memset (valbuf, 0, sizeof (valbuf)); */
+/* OBSOLETE       val = (char *) VALUE_CONTENTS (args[argnum]); */
+/* OBSOLETE  */
+/* OBSOLETE /* FIXME -- tic80 can take doubleword arguments in register pairs */ */
+/* OBSOLETE       is_struct = (type->code == TYPE_CODE_STRUCT); */
+/* OBSOLETE       odd_sized_struct = 0; */
+/* OBSOLETE  */
+/* OBSOLETE       if (!is_struct) */
+/* OBSOLETE 	{ */
+/* OBSOLETE 	  if (len < 4) */
+/* OBSOLETE 	    {			/* value gets right-justified in the register or stack word */ */
+/* OBSOLETE 	      memcpy (valbuf + (4 - len), val, len); */
+/* OBSOLETE 	      val = valbuf; */
+/* OBSOLETE 	    } */
+/* OBSOLETE 	  if (len > 4 && (len & 3) != 0) */
+/* OBSOLETE 	    odd_sized_struct = 1;	/* such structs go entirely on stack */ */
+/* OBSOLETE 	} */
+/* OBSOLETE       else */
+/* OBSOLETE 	{ */
+/* OBSOLETE 	  /* Structs are always passed by reference. */ */
+/* OBSOLETE 	  write_register (argreg, sp + stack_offset); */
+/* OBSOLETE 	  argreg++; */
+/* OBSOLETE 	} */
+/* OBSOLETE  */
+/* OBSOLETE       while (len > 0) */
+/* OBSOLETE 	{ */
+/* OBSOLETE 	  if (is_struct || argreg > ARGLAST_REGNUM || odd_sized_struct) */
+/* OBSOLETE 	    {			/* must go on the stack */ */
+/* OBSOLETE 	      write_memory (sp + stack_offset, val, 4); */
+/* OBSOLETE 	      stack_offset += 4; */
+/* OBSOLETE 	    } */
+/* OBSOLETE 	  /* NOTE WELL!!!!!  This is not an "else if" clause!!! */
+/* OBSOLETE 	     That's because some things get passed on the stack */
+/* OBSOLETE 	     AND in the registers!   */ */
+/* OBSOLETE 	  if (!is_struct && argreg <= ARGLAST_REGNUM) */
+/* OBSOLETE 	    {			/* there's room in a register */ */
+/* OBSOLETE 	      regval = extract_address (val, REGISTER_RAW_SIZE (argreg)); */
+/* OBSOLETE 	      write_register (argreg, regval); */
+/* OBSOLETE 	      argreg += 2;	/* FIXME -- what about doubleword args? */ */
+/* OBSOLETE 	    } */
+/* OBSOLETE 	  /* Store the value 4 bytes at a time.  This means that things */
+/* OBSOLETE 	     larger than 4 bytes may go partly in registers and partly */
+/* OBSOLETE 	     on the stack.  */ */
+/* OBSOLETE 	  len -= REGISTER_RAW_SIZE (argreg); */
+/* OBSOLETE 	  val += REGISTER_RAW_SIZE (argreg); */
+/* OBSOLETE 	} */
+/* OBSOLETE     } */
+/* OBSOLETE   return sp; */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE /* Function: tic80_write_sp */
+/* OBSOLETE    Because SP is really a read-only register that mirrors either SPU or SPI, */
+/* OBSOLETE    we must actually write one of those two as well, depending on PSW. */ */
+/* OBSOLETE  */
+/* OBSOLETE void */
+/* OBSOLETE tic80_write_sp (CORE_ADDR val) */
+/* OBSOLETE { */
+/* OBSOLETE #if 0 */
+/* OBSOLETE   unsigned long psw = read_register (PSW_REGNUM); */
+/* OBSOLETE  */
+/* OBSOLETE   if (psw & 0x80)		/* stack mode: user or interrupt */ */
+/* OBSOLETE     write_register (SPU_REGNUM, val); */
+/* OBSOLETE   else */
+/* OBSOLETE     write_register (SPI_REGNUM, val); */
+/* OBSOLETE #endif */
+/* OBSOLETE   write_register (SP_REGNUM, val); */
+/* OBSOLETE } */
+/* OBSOLETE  */
+/* OBSOLETE void */
+/* OBSOLETE _initialize_tic80_tdep (void) */
+/* OBSOLETE { */
+/* OBSOLETE   tm_print_insn = print_insn_tic80; */
+/* OBSOLETE } */