Initial creation of sourceware repository

1 files changed, 0 insertions, 552 deletions

diff --git a/gdb/fr30-tdep.c b/gdb/fr30-tdep.c
deleted file mode 100644
index 0d442da..0000000
--- a/gdb/fr30-tdep.c
+++ /dev/null
@@ -1,552 +0,0 @@
-/* Target-dependent code for the Fujitsu FR30.
-   Copyright 1999, 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 "frame.h"
-#include "inferior.h"
-#include "obstack.h"
-#include "target.h"
-#include "value.h"
-#include "bfd.h"
-#include "gdb_string.h"
-#include "gdbcore.h"
-#include "symfile.h"
-
-/* Function: pop_frame
-   This routine gets called when either the user uses the `return'
-   command, or the call dummy breakpoint gets hit.  */
-
-void
-fr30_pop_frame ()
-{
-  struct frame_info *frame = get_current_frame();
-  int regnum;
-  CORE_ADDR sp = read_register(SP_REGNUM);
-
-  if (PC_IN_CALL_DUMMY(frame->pc, frame->frame, frame->frame))
-    generic_pop_dummy_frame ();
-  else
-    {
-      write_register (PC_REGNUM, FRAME_SAVED_PC (frame));
-
-      for (regnum = 0; regnum < NUM_REGS; regnum++)
-	if (frame->fsr.regs[regnum] != 0) {
-	  write_register (regnum,
-		  read_memory_unsigned_integer (frame->fsr.regs[regnum],
-			REGISTER_RAW_SIZE(regnum)));
-	}
-      write_register (SP_REGNUM, sp + frame->framesize);
-    }
-  flush_cached_frames ();
-}
-
-/* Function: skip_prologue
-   Return the address of the first code past the prologue of the function.  */
-
-CORE_ADDR
-fr30_skip_prologue(CORE_ADDR pc)
-{
-  CORE_ADDR func_addr, func_end;
-
-  /* See what the symbol table says */
-
-  if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
-    {
-      struct symtab_and_line sal;
-
-      sal = find_pc_line (func_addr, 0);
-
-      if (sal.line != 0 && sal.end < func_end) {
-	return sal.end;
-	}
-    }
-
-/* Either we didn't find the start of this function (nothing we can do),
-   or there's no line info, or the line after the prologue is after
-   the end of the function (there probably isn't a prologue). */
-
-  return pc;
-}
-
-
-/* Function: push_arguments
-   Setup arguments and RP for a call to the target.  First four args
-   go in FIRST_ARGREG -> LAST_ARGREG, subsequent args go on stack...
-   Structs are passed by reference.  XXX not right now Z.R.
-   64 bit quantities (doubles and long longs) may be split between
-   the regs and the stack.
-   When calling a function that returns a struct, a pointer to the struct
-   is passed in as a secret first argument (always in FIRST_ARGREG).
-
-   Stack space for the args has NOT been allocated: that job is up to us.
-*/
-
-CORE_ADDR
-fr30_push_arguments(nargs, args, sp, struct_return, struct_addr)
-     int         nargs;
-     value_ptr * args;
-     CORE_ADDR   sp;
-     int         struct_return;
-     CORE_ADDR   struct_addr;
-{
-  int argreg;
-  int argnum;
-  int stack_offset;
-  struct stack_arg {
-      char *val;
-      int len;
-      int offset;
-    };
-  struct stack_arg *stack_args =
-      (struct stack_arg*)alloca (nargs * sizeof (struct stack_arg));
-  int nstack_args = 0;
-
-  argreg = FIRST_ARGREG;
-
-  /* the struct_return pointer occupies the first parameter-passing reg */
-  if (struct_return)
-      write_register (argreg++, struct_addr);
-
-  stack_offset = 0;
-
-  /* Process args from left to right.  Store as many as allowed in
-	registers, save the rest to be pushed on the stack */
-  for(argnum = 0; argnum < nargs; argnum++)
-    {
-      char *         val;
-      value_ptr      arg = args[argnum];
-      struct type *  arg_type = check_typedef (VALUE_TYPE (arg));
-      struct type *  target_type = TYPE_TARGET_TYPE (arg_type);
-      int            len = TYPE_LENGTH (arg_type);
-      enum type_code typecode = TYPE_CODE (arg_type);
-      CORE_ADDR      regval;
-      int newarg;
-
-      val = (char *) VALUE_CONTENTS (arg);
-
-	{
-	  /* Copy the argument to general registers or the stack in
-	     register-sized pieces.  Large arguments are split between
-	     registers and stack.  */
-	  while (len > 0)
-	    {
-	      if (argreg <= LAST_ARGREG)
-		{
-	          int partial_len = len < REGISTER_SIZE ? len : REGISTER_SIZE;
-		  regval = extract_address (val, partial_len);
-
-		  /* It's a simple argument being passed in a general
-		     register.  */
-		  write_register (argreg, regval);
-		  argreg++;
-	          len -= partial_len;
-	          val += partial_len;
-		}
-	      else
-		{
-		  /* keep for later pushing */
-		  stack_args[nstack_args].val = val;
-		  stack_args[nstack_args++].len = len;
-		  break;
-		}
-	    }
-	}
-    }
-    /* now do the real stack pushing, process args right to left */
-    while(nstack_args--)
-      {
-	sp -= stack_args[nstack_args].len;
-	write_memory(sp, stack_args[nstack_args].val,
-		stack_args[nstack_args].len);
-      }
-
-  /* Return adjusted stack pointer.  */
-  return sp;
-}
-
-_initialize_fr30_tdep()
-{
-	extern int print_insn_fr30(bfd_vma, disassemble_info *);
-
-	tm_print_insn = print_insn_fr30;
-}
-
-/* Function: check_prologue_cache
-   Check if prologue for this frame's PC has already been scanned.
-   If it has, copy the relevant information about that prologue and
-   return non-zero.  Otherwise do not copy anything and return zero.
-
-   The information saved in the cache includes:
-     * the frame register number;
-     * the size of the stack frame;
-     * the offsets of saved regs (relative to the old SP); and
-     * the offset from the stack pointer to the frame pointer
-
-   The cache contains only one entry, since this is adequate
-   for the typical sequence of prologue scan requests we get.
-   When performing a backtrace, GDB will usually ask to scan
-   the same function twice in a row (once to get the frame chain,
-   and once to fill in the extra frame information).
-*/
-
-static struct frame_info prologue_cache;
-
-static int
-check_prologue_cache (fi)
-     struct frame_info * fi;
-{
-  int i;
-
-  if (fi->pc == prologue_cache.pc)
-    {
-      fi->framereg = prologue_cache.framereg;
-      fi->framesize = prologue_cache.framesize;
-      fi->frameoffset = prologue_cache.frameoffset;
-      for (i = 0; i <= NUM_REGS; i++)
-	fi->fsr.regs[i] = prologue_cache.fsr.regs[i];
-      return 1;
-    }
-  else
-    return 0;
-}
-
-
-/* Function: save_prologue_cache
-   Copy the prologue information from fi to the prologue cache.
-*/
-
-static void
-save_prologue_cache (fi)
-     struct frame_info * fi;
-{
-  int i;
-
-  prologue_cache.pc          = fi->pc;
-  prologue_cache.framereg    = fi->framereg;
-  prologue_cache.framesize   = fi->framesize;
-  prologue_cache.frameoffset = fi->frameoffset;
-  
-  for (i = 0; i <= NUM_REGS; i++) {
-    prologue_cache.fsr.regs[i] = fi->fsr.regs[i];
-  }
-}
-
-
-/* Function: scan_prologue
-   Scan the prologue of the function that contains PC, and record what
-   we find in PI.  PI->fsr must be zeroed by the called.  Returns the
-   pc after the prologue.  Note that the addresses saved in pi->fsr
-   are actually just frame relative (negative offsets from the frame
-   pointer).  This is because we don't know the actual value of the
-   frame pointer yet.  In some circumstances, the frame pointer can't
-   be determined till after we have scanned the prologue.  */
-
-static void
-fr30_scan_prologue (fi)
-     struct frame_info * fi;
-{
-  int sp_offset, fp_offset;
-  CORE_ADDR prologue_start, prologue_end, current_pc;
-
-  /* Check if this function is already in the cache of frame information. */
-  if (check_prologue_cache (fi))
-    return;
-
-  /* Assume there is no frame until proven otherwise.  */
-  fi->framereg    = SP_REGNUM;
-  fi->framesize   = 0;
-  fi->frameoffset = 0;
-
-  /* Find the function prologue.  If we can't find the function in
-     the symbol table, peek in the stack frame to find the PC.  */
-  if (find_pc_partial_function (fi->pc, NULL, &prologue_start, &prologue_end))
-    {
-      /* Assume the prologue is everything between the first instruction
-         in the function and the first source line.  */
-      struct symtab_and_line sal = find_pc_line (prologue_start, 0);
-
-      if (sal.line == 0)		/* no line info, use current PC */
-	prologue_end = fi->pc;
-      else if (sal.end < prologue_end)	/* next line begins after fn end */
-	prologue_end = sal.end;		/* (probably means no prologue)  */
-    }
-  else
-    {
-      /* XXX Z.R. What now??? The following is entirely bogus */
-      prologue_start = (read_memory_integer (fi->frame, 4) & 0x03fffffc) - 12;
-      prologue_end = prologue_start + 40;
-    }
-
-  /* Now search the prologue looking for instructions that set up the
-     frame pointer, adjust the stack pointer, and save registers.  */
-
-  sp_offset = fp_offset = 0;
-  for (current_pc = prologue_start; current_pc < prologue_end; current_pc += 2)
-    {
-      unsigned int insn;
-
-      insn = read_memory_unsigned_integer (current_pc, 2);
-
-      if ((insn & 0xfe00) == 0x8e00)			/* stm0 or stm1 */
-	{
-	  int reg, mask = insn & 0xff;
-
-	  /* scan in one sweep - create virtual 16-bit mask from either insn's mask */
-          if((insn & 0x0100) == 0)
-	    {
-	      mask <<= 8;  /* stm0 - move to upper byte in virtual mask */
-	    }
-
-	  /* Calculate offsets of saved registers (to be turned later into addresses). */
-	  for (reg = R4_REGNUM; reg <= R11_REGNUM; reg++)
-	    if (mask & (1 << (15 - reg)))
-	      {
-		sp_offset -= 4;
-		fi->fsr.regs[reg] = sp_offset;
-	      }
-	}
-      else if((insn & 0xfff0) == 0x1700)		/* st rx,@-r15 */
-        {
-	  int reg = insn & 0xf;
-
-	  sp_offset -= 4;
-	  fi->fsr.regs[reg] = sp_offset;
-	}
-      else if((insn & 0xff00) == 0x0f00)		/* enter */
-        {
-	  fp_offset = fi->fsr.regs[FP_REGNUM] = sp_offset - 4;
-	  sp_offset -= 4 * (insn & 0xff);
-	  fi->framereg = FP_REGNUM;
-	}
-      else if(insn == 0x1781)				/* st rp,@-sp */
-	{
-		sp_offset -= 4;
-		fi->fsr.regs[RP_REGNUM] = sp_offset;
-	}
-      else if(insn == 0x170e)				/* st fp,@-sp */
-	{
-		sp_offset -= 4;
-		fi->fsr.regs[FP_REGNUM] = sp_offset;
-	}
-      else if(insn == 0x8bfe)				/* mov sp,fp */
-	{
-	  fi->framereg = FP_REGNUM;
-	}
-      else if((insn & 0xff00) == 0xa300)		/* addsp xx */
-	{
-	  sp_offset += 4 * (signed char)(insn & 0xff);
-	}
-      else if((insn & 0xff0f) == 0x9b00 &&		/* ldi:20 xx,r0 */
-	read_memory_unsigned_integer(current_pc+4, 2)
-	  == 0xac0f)					/* sub r0,sp */
-	{
-	  /* large stack adjustment */
-	  sp_offset -= (((insn & 0xf0) << 12) | read_memory_unsigned_integer(current_pc+2, 2));
-	  current_pc += 4;
-	}
-      else if(insn == 0x9f80 &&				/* ldi:32 xx,r0 */
-	read_memory_unsigned_integer(current_pc+6, 2)
-	  == 0xac0f)					/* sub r0,sp */
-	{
-	  /* large stack adjustment */
-	  sp_offset -=
-		(read_memory_unsigned_integer(current_pc+2, 2) << 16 |
-			read_memory_unsigned_integer(current_pc+4, 2));
-	  current_pc += 6;
-	}
-    }
-
-  /* The frame size is just the negative of the offset (from the original SP)
-     of the last thing thing we pushed on the stack.  The frame offset is
-     [new FP] - [new SP].  */
-  fi->framesize = -sp_offset;
-  fi->frameoffset = fp_offset - sp_offset;
-  
-  save_prologue_cache (fi);
-}
-
-/* Function: init_extra_frame_info
-   Setup the frame's frame pointer, pc, and frame addresses for saved
-   registers.  Most of the work is done in scan_prologue().
-
-   Note that when we are called for the last frame (currently active frame),
-   that fi->pc and fi->frame will already be setup.  However, fi->frame will
-   be valid only if this routine uses FP.  For previous frames, fi-frame will
-   always be correct (since that is derived from fr30_frame_chain ()).
-
-   We can be called with the PC in the call dummy under two circumstances.
-   First, during normal backtracing, second, while figuring out the frame
-   pointer just prior to calling the target function (see run_stack_dummy).  */
-
-void
-fr30_init_extra_frame_info (fi)
-     struct frame_info * fi;
-{
-  int reg;
-
-  if (fi->next)
-    fi->pc = FRAME_SAVED_PC (fi->next);
-
-  memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs);
-
-  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;
-    }
-      fr30_scan_prologue (fi);
-
-      if (!fi->next)			/* this is the innermost frame? */
-	fi->frame = read_register (fi->framereg);
-      else			 	/* not the innermost frame */
-	/* If we have an FP,  the callee saved it. */
-	if (fi->framereg == FP_REGNUM)
-	  if (fi->next->fsr.regs[fi->framereg] != 0)
-	    fi->frame = read_memory_integer (fi->next->fsr.regs[fi->framereg],
-					     4);
-      /* Calculate actual addresses of saved registers using offsets determined
-         by fr30_scan_prologue.  */
-      for (reg = 0; reg < NUM_REGS; reg++)
-	if (fi->fsr.regs[reg] != 0) {
-	  fi->fsr.regs[reg] += fi->frame + fi->framesize - 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
-fr30_find_callers_reg (fi, regnum)
-     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_unsigned_integer (fi->fsr.regs[regnum], 
-					   REGISTER_RAW_SIZE(regnum));
-
-  return read_register (regnum);
-}
-
-
-/* Function: frame_chain
-   Figure out the frame prior to FI.  Unfortunately, this involves
-   scanning the prologue of the caller, which will also be done
-   shortly by fr30_init_extra_frame_info.  For the dummy frame, we
-   just return the stack pointer that was in use at the time the
-   function call was made.  */
-
-
-CORE_ADDR
-fr30_frame_chain (fi)
-     struct frame_info * fi;
-{
-  CORE_ADDR fn_start, callers_pc, fp;
-  struct frame_info caller_fi;
-  int framereg;
-
-  /* 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 = fr30_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 */
-
-  framereg = fi->framereg;
-
-  /* If the caller is the startup code, we're at the end of the chain.  */
-  if (find_pc_partial_function (callers_pc, 0, &fn_start, 0))
-    if (fn_start == entry_point_address ())
-      return 0;
-
-  memset (& caller_fi, 0, sizeof (caller_fi));
-  caller_fi.pc = callers_pc;
-  fr30_scan_prologue (& caller_fi);
-  framereg = caller_fi.framereg;
-
-  /* If the caller used a frame register, return its value.
-     Otherwise, return the caller's stack pointer.  */
-  if (framereg == FP_REGNUM)
-    return fr30_find_callers_reg (fi, framereg);
-  else
-    return fi->frame + fi->framesize;
-}
-
-/* Function: frame_saved_pc 
-   Find the caller of this frame.  We do this by seeing if RP_REGNUM
-   is saved in the stack anywhere, otherwise we get it from the
-   registers.  If the inner frame is a dummy frame, return its PC
-   instead of RP, because that's where "caller" of the dummy-frame
-   will be found.  */
-
-CORE_ADDR
-fr30_frame_saved_pc (fi)
-     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 fr30_find_callers_reg (fi, RP_REGNUM);
-}
-
-/* Function: fix_call_dummy
-   Pokes the callee function's address into the CALL_DUMMY assembly stub.
-   Assumes that the CALL_DUMMY looks like this:
-	jarl <offset24>, r31
-	trap
-   */
-
-int
-fr30_fix_call_dummy (dummy, sp, fun, nargs, args, type, gcc_p)
-     char *dummy;
-     CORE_ADDR sp;
-     CORE_ADDR fun;
-     int nargs;
-     value_ptr *args;
-     struct type *type;
-     int gcc_p;
-{
-  long offset24;
-
-  offset24 = (long) fun - (long) entry_point_address ();
-  offset24 &= 0x3fffff;
-  offset24 |= 0xff800000;	/* jarl <offset24>, r31 */
-
-  store_unsigned_integer ((unsigned int *)&dummy[2], 2, offset24 & 0xffff);
-  store_unsigned_integer ((unsigned int *)&dummy[0], 2, offset24 >> 16);
-  return 0;
-}