Initial revision

1 files changed, 0 insertions, 579 deletions

diff --git a/gdb/findvar.c b/gdb/findvar.c
deleted file mode 100644
index 0157d10..0000000
--- a/gdb/findvar.c
+++ /dev/null
@@ -1,579 +0,0 @@
-/* Find a variable's value in memory, for GDB, the GNU debugger.
-   Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-GDB 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 1, or (at your option)
-any later version.
-
-GDB 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 GDB; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-#include "defs.h"
-#include "param.h"
-#include "symtab.h"
-#include "frame.h"
-#include "value.h"
-
-CORE_ADDR read_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.  */
-
-CORE_ADDR
-find_saved_register (frame, regnum)
-     FRAME frame;
-     int regnum;
-{
-  struct frame_info *fi;
-  struct frame_saved_regs saved_regs;
-
-  register FRAME frame1 = 0;
-  register CORE_ADDR addr = 0;
-
-#ifdef HAVE_REGISTER_WINDOWS
-  /* We assume that a register in a register window will only be saved
-     in one place (since the name changes and 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;	
-	  
-      fi = get_frame_info (frame1);
-      get_frame_saved_regs (fi, &saved_regs);
-      return (saved_regs.regs[regnum] ?
-	      saved_regs.regs[regnum] : 0);
-    }
-#endif /* HAVE_REGISTER_WINDOWS */
-
-  /* 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_prev_frame (frame1);
-      if (frame1 == 0 || frame1 == frame)
-	break;
-      fi = get_frame_info (frame1);
-      get_frame_saved_regs (fi, &saved_regs);
-      if (saved_regs.regs[regnum])
-	addr = saved_regs.regs[regnum];
-    }
-
-  return addr;
-}
-
-/* Copy the bytes of register REGNUM, relative to the current stack frame,
-   into our memory at MYADDR.
-   The number of bytes copied is REGISTER_RAW_SIZE (REGNUM).  */
-
-void
-read_relative_register_raw_bytes (regnum, myaddr)
-     int regnum;
-     char *myaddr;
-{
-  register CORE_ADDR addr;
-
-  if (regnum == FP_REGNUM)
-    {
-      bcopy (&FRAME_FP(selected_frame), myaddr, sizeof (CORE_ADDR));
-      return;
-    }
-
-  addr = find_saved_register (selected_frame, regnum);
-
-  if (addr)
-    {
-      if (regnum == SP_REGNUM)
-	{
-	  CORE_ADDR buffer = addr;
-	  bcopy (&buffer, myaddr, sizeof (CORE_ADDR));
-	}
-      else
-	read_memory (addr, myaddr, REGISTER_RAW_SIZE (regnum));
-      return;
-    }
-  read_register_bytes (REGISTER_BYTE (regnum),
-		       myaddr, REGISTER_RAW_SIZE (regnum));
-}
-
-/* Return a `value' with the contents of register REGNUM
-   in its virtual format, with the type specified by
-   REGISTER_VIRTUAL_TYPE.  */
-
-value
-value_of_register (regnum)
-     int regnum;
-{
-  register CORE_ADDR addr;
-  register value val;
-  char raw_buffer[MAX_REGISTER_RAW_SIZE];
-  char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
-
-  if (! (have_inferior_p () || have_core_file_p ()))
-    error ("Can't get value of register without inferior or core file");
-  
-  addr =  find_saved_register (selected_frame, regnum);
-  if (addr)
-    {
-      if (regnum == SP_REGNUM)
-	return value_from_long (builtin_type_int, (LONGEST) addr);
-      read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
-    }
-  else
-    read_register_bytes (REGISTER_BYTE (regnum), raw_buffer,
-			 REGISTER_RAW_SIZE (regnum));
-
-  REGISTER_CONVERT_TO_VIRTUAL (regnum, raw_buffer, virtual_buffer);
-  val = allocate_value (REGISTER_VIRTUAL_TYPE (regnum));
-  bcopy (virtual_buffer, VALUE_CONTENTS (val), REGISTER_VIRTUAL_SIZE (regnum));
-  VALUE_LVAL (val) = addr ? lval_memory : lval_register;
-  VALUE_ADDRESS (val) = addr ? addr : REGISTER_BYTE (regnum);
-  VALUE_REGNO (val) = regnum;
-  return val;
-}
-
-/* Low level examining and depositing of registers.
-
-   Note that you must call `fetch_registers' once
-   before examining or depositing any registers.  */
-
-char registers[REGISTER_BYTES];
-
-/* Copy LEN bytes of consecutive data from registers
-   starting with the REGBYTE'th byte of register data
-   into memory at MYADDR.  */
-
-void
-read_register_bytes (regbyte, myaddr, len)
-     int regbyte;
-     char *myaddr;
-     int len;
-{
-  bcopy (&registers[regbyte], myaddr, len);
-}
-
-/* Copy LEN bytes of consecutive data from memory at MYADDR
-   into registers starting with the REGBYTE'th byte of register data.  */
-
-void
-write_register_bytes (regbyte, myaddr, len)
-     int regbyte;
-     char *myaddr;
-     int len;
-{
-  bcopy (myaddr, &registers[regbyte], len);
-  if (have_inferior_p ())
-    store_inferior_registers (-1);
-}
-
-/* Return the contents of register REGNO,
-   regarding it as an integer.  */
-
-CORE_ADDR
-read_register (regno)
-     int regno;
-{
-  /* This loses when REGISTER_RAW_SIZE (regno) != sizeof (int) */
-  return *(int *) &registers[REGISTER_BYTE (regno)];
-}
-
-/* Store VALUE in the register number REGNO, regarded as an integer.  */
-
-void
-write_register (regno, val)
-     int regno, val;
-{
-  /* This loses when REGISTER_RAW_SIZE (regno) != sizeof (int) */
-#if defined(sun4)
-  /* This is a no-op on a Sun 4.  */
-  if (regno == 0)
-    return;
-#endif
-
-  *(int *) &registers[REGISTER_BYTE (regno)] = val;
-
-  if (have_inferior_p ())
-    store_inferior_registers (regno);
-}
-
-/* Record that register REGNO contains VAL.
-   This is used when the value is obtained from the inferior or core dump,
-   so there is no need to store the value there.  */
-
-void
-supply_register (regno, val)
-     int regno;
-     char *val;
-{
-  bcopy (val, &registers[REGISTER_BYTE (regno)], REGISTER_RAW_SIZE (regno));
-}
-
-/* Given a struct symbol for a variable,
-   and a stack frame id, read the value of the variable
-   and return a (pointer to a) struct value containing the value.  */
-
-value
-read_var_value (var, frame)
-     register struct symbol *var;
-     FRAME frame;
-{
-  register value v;
-
-  struct frame_info *fi;
-
-  struct type *type = SYMBOL_TYPE (var);
-  register CORE_ADDR addr = 0;
-  int val = SYMBOL_VALUE (var);
-  register int len;
-
-  v = allocate_value (type);
-  VALUE_LVAL (v) = lval_memory;	/* The most likely possibility.  */
-  len = TYPE_LENGTH (type);
-
-  if (frame == 0) frame = selected_frame;
-
-  switch (SYMBOL_CLASS (var))
-    {
-    case LOC_CONST:
-    case LOC_LABEL:
-      bcopy (&val, VALUE_CONTENTS (v), len);
-      VALUE_LVAL (v) = not_lval;
-      return v;
-
-    case LOC_CONST_BYTES:
-      bcopy (val, VALUE_CONTENTS (v), len);
-      VALUE_LVAL (v) = not_lval;
-      return v;
-
-    case LOC_STATIC:
-      addr = val;
-      break;
-
-/* Nonzero if a struct which is located in a register or a LOC_ARG
-   really contains
-   the address of the struct, not the struct itself.  GCC_P is nonzero
-   if the function was compiled with GCC.  */
-#if !defined (REG_STRUCT_HAS_ADDR)
-#define REG_STRUCT_HAS_ADDR(gcc_p) 0
-#endif
-
-    case LOC_ARG:
-      fi = get_frame_info (frame);
-      addr = val + FRAME_ARGS_ADDRESS (fi);
-      break;
-      
-    case LOC_REF_ARG:
-      fi = get_frame_info (frame);
-      addr = val + FRAME_ARGS_ADDRESS (fi);
-      addr = read_memory_integer (addr, sizeof (CORE_ADDR));
-      break;
-      
-    case LOC_LOCAL:
-      fi = get_frame_info (frame);
-      addr = val + FRAME_LOCALS_ADDRESS (fi);
-      break;
-
-    case LOC_TYPEDEF:
-      error ("Cannot look up value of a typedef");
-
-    case LOC_BLOCK:
-      VALUE_ADDRESS (v) = BLOCK_START (SYMBOL_BLOCK_VALUE (var));
-      return v;
-
-    case LOC_REGISTER:
-    case LOC_REGPARM:
-      {
-	struct block *b = get_frame_block (frame);
-
-	v = value_from_register (type, val, frame);
-
-	if (REG_STRUCT_HAS_ADDR(b->gcc_compile_flag)
-	    && TYPE_CODE (type) == TYPE_CODE_STRUCT)
-	  addr = *(CORE_ADDR *)VALUE_CONTENTS (v);
-	else
-	  return v;
-      }
-    }
-
-  read_memory (addr, VALUE_CONTENTS (v), len);
-  VALUE_ADDRESS (v) = addr;
-  return v;
-}
-
-/* Return a value of type TYPE, stored in register REGNUM, in frame
-   FRAME. */
-
-value
-value_from_register (type, regnum, frame)
-     struct type *type;
-     int regnum;
-     FRAME frame;
-{
-  char raw_buffer [MAX_REGISTER_RAW_SIZE];
-  char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
-  CORE_ADDR addr;
-  value v = allocate_value (type);
-  int len = TYPE_LENGTH (type);
-  char *value_bytes = 0;
-  int value_bytes_copied = 0;
-  int num_storage_locs;
-
-  VALUE_REGNO (v) = regnum;
-
-  num_storage_locs = (len > REGISTER_VIRTUAL_SIZE (regnum) ?
-		      ((len - 1) / REGISTER_RAW_SIZE (regnum)) + 1 :
-		      1);
-
-  if (num_storage_locs > 1)
-    {
-      /* Value spread across multiple storage locations.  */
-      
-      int local_regnum;
-      int mem_stor = 0, reg_stor = 0;
-      int mem_tracking = 1;
-      CORE_ADDR last_addr = 0;
-
-      value_bytes = (char *) alloca (len + MAX_REGISTER_RAW_SIZE);
-
-      /* Copy all of the data out, whereever it may be.  */
-
-      for (local_regnum = regnum;
-	   value_bytes_copied < len;
-	   (value_bytes_copied += REGISTER_RAW_SIZE (local_regnum),
-	    ++local_regnum))
-	{
-	  int register_index = local_regnum - regnum;
-	  addr = find_saved_register (frame, local_regnum);
-	  if (addr == 0)
-	    {
-	      read_register_bytes (REGISTER_BYTE (local_regnum),
-				   value_bytes + value_bytes_copied,
-				   REGISTER_RAW_SIZE (local_regnum));
-	      reg_stor++;
-	    }
-	  else
-	    {
-	      read_memory (addr, value_bytes + value_bytes_copied,
-			   REGISTER_RAW_SIZE (local_regnum));
-	      mem_stor++;
-	      mem_tracking =
-		(mem_tracking
-		 && (regnum == local_regnum
-		     || addr == last_addr));
-	    }
-	  last_addr = addr;
-	}
-
-      if ((reg_stor && mem_stor)
-	  || (mem_stor && !mem_tracking))
-	/* Mixed storage; all of the hassle we just went through was
-	   for some good purpose.  */
-	{
-	  VALUE_LVAL (v) = lval_reg_frame_relative;
-	  VALUE_FRAME (v) = FRAME_FP (frame);
-	  VALUE_FRAME_REGNUM (v) = regnum;
-	}
-      else if (mem_stor)
-	{
-	  VALUE_LVAL (v) = lval_memory;
-	  VALUE_ADDRESS (v) = find_saved_register (frame, regnum);
-	}
-      else if (reg_stor)
-	{
-	  VALUE_LVAL (v) = lval_register;
-	  VALUE_ADDRESS (v) = REGISTER_BYTE (regnum);
-	}
-      else
-	fatal ("value_from_register: Value not stored anywhere!");
-      
-      /* Any structure stored in more than one register will always be
-	 an inegral number of registers.  Otherwise, you'd need to do
-	 some fiddling with the last register copied here for little
-	 endian machines.  */
-
-      /* Copy into the contents section of the value.  */
-      bcopy (value_bytes, VALUE_CONTENTS (v), len);
-
-      return v;
-    }
-
-  /* Data is completely contained within a single register.  Locate the
-     register's contents in a real register or in core;
-     read the data in raw format.  */
-  
-  addr = find_saved_register (frame, regnum);
-  if (addr == 0)
-    {
-      /* Value is really in a register.  */
-      
-      VALUE_LVAL (v) = lval_register;
-      VALUE_ADDRESS (v) = REGISTER_BYTE (regnum);
-      
-      read_register_bytes (REGISTER_BYTE (regnum),
-			   raw_buffer, REGISTER_RAW_SIZE (regnum));
-    }
-  else
-    {
-      /* Value was in a register that has been saved in memory.  */
-      
-      read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
-      VALUE_LVAL (v) = lval_memory;
-      VALUE_ADDRESS (v) = addr;
-    }
-  
-  /* Convert the raw contents to virtual contents.
-     (Just copy them if the formats are the same.)  */
-  
-  REGISTER_CONVERT_TO_VIRTUAL (regnum, raw_buffer, virtual_buffer);
-  
-  if (REGISTER_CONVERTIBLE (regnum))
-    {
-      /* When the raw and virtual formats differ, the virtual format
-	 corresponds to a specific data type.  If we want that type,
-	 copy the data into the value.
-	 Otherwise, do a type-conversion.  */
-      
-      if (type != REGISTER_VIRTUAL_TYPE (regnum))
-	{
-	  /* eg a variable of type `float' in a 68881 register
-	     with raw type `extended' and virtual type `double'.
-	     Fetch it as a `double' and then convert to `float'.  */
-	  v = allocate_value (REGISTER_VIRTUAL_TYPE (regnum));
-	  bcopy (virtual_buffer, VALUE_CONTENTS (v), len);
-	  v = value_cast (type, v);
-	}
-      else
-	bcopy (virtual_buffer, VALUE_CONTENTS (v), len);
-    }
-  else
-    {
-      /* Raw and virtual formats are the same for this register.  */
-
-#ifdef BYTES_BIG_ENDIAN
-      if (len < REGISTER_RAW_SIZE (regnum))
-	{
-  	  /* Big-endian, and we want less than full size.  */
-	  VALUE_OFFSET (v) = REGISTER_RAW_SIZE (regnum) - len;
-	}
-#endif
-
-      bcopy (virtual_buffer + VALUE_OFFSET (v),
-	     VALUE_CONTENTS (v), len);
-    }
-  
-  return v;
-}
-
-/* Given a struct symbol for a variable,
-   and a stack frame id, 
-   return a (pointer to a) struct value containing the variable's address.  */
-
-value
-locate_var_value (var, frame)
-     register struct symbol *var;
-     FRAME frame;
-{
-  register CORE_ADDR addr = 0;
-  int val = SYMBOL_VALUE (var);
-  struct frame_info *fi;
-  struct type *type = SYMBOL_TYPE (var);
-  struct type *result_type;
-
-  if (frame == 0) frame = selected_frame;
-
-  switch (SYMBOL_CLASS (var))
-    {
-    case LOC_CONST:
-    case LOC_CONST_BYTES:
-      error ("Address requested for identifier \"%s\" which is a constant.",
-	     SYMBOL_NAME (var));
-
-    case LOC_REGISTER:
-    case LOC_REGPARM:
-      addr = find_saved_register (frame, val);
-      if (addr != 0)
-	{
-	  int len = TYPE_LENGTH (type);
-#ifdef BYTES_BIG_ENDIAN
-	  if (len < REGISTER_RAW_SIZE (val))
-	    /* Big-endian, and we want less than full size.  */
-	    addr += REGISTER_RAW_SIZE (val) - len;
-#endif
-	  break;
-	}
-      error ("Address requested for identifier \"%s\" which is in a register.",
-	     SYMBOL_NAME (var));
-
-    case LOC_STATIC:
-    case LOC_LABEL:
-      addr = val;
-      break;
-
-    case LOC_ARG:
-      fi = get_frame_info (frame);
-      addr = val + FRAME_ARGS_ADDRESS (fi);
-      break;
-
-    case LOC_REF_ARG:
-      fi = get_frame_info (frame);
-      addr = val + FRAME_ARGS_ADDRESS (fi);
-      addr = read_memory_integer (addr, sizeof (CORE_ADDR));
-      break;
-
-    case LOC_LOCAL:
-      fi = get_frame_info (frame);
-      addr = val + FRAME_LOCALS_ADDRESS (fi);
-      break;
-
-    case LOC_TYPEDEF:
-      error ("Address requested for identifier \"%s\" which is a typedef.",
-	     SYMBOL_NAME (var));
-
-    case LOC_BLOCK:
-      addr = BLOCK_START (SYMBOL_BLOCK_VALUE (var));
-      break;
-    }
-
-  /* Address of an array is of the type of address of it's elements.  */
-  result_type =
-    lookup_pointer_type (TYPE_CODE (type) == TYPE_CODE_ARRAY ?
-			 TYPE_TARGET_TYPE (type) : type);
-
-  return value_cast (result_type,
-		     value_from_long (builtin_type_long, (LONGEST) addr));
-}
-