2002-11-15 David Carlton <carlton@math.stanford.edu>

	* Merge from mainline; tag is carlton_dictionary-20021115-merge.

1 files changed, 3 insertions, 855 deletions

diff --git a/gdb/blockframe.c b/gdb/blockframe.c
index 901927b..4177409 100644
--- a/gdb/blockframe.c
+++ b/gdb/blockframe.c
@@ -36,27 +36,10 @@
 #include "annotate.h"
 #include "regcache.h"
 #include "gdb_assert.h"
+#include "dummy-frame.h"
 
 /* Prototypes for exported functions. */
 
-static void generic_call_dummy_register_unwind (struct frame_info *frame,
-						void **cache,
-						int regnum,
-						int *optimized,
-						enum lval_type *lval,
-						CORE_ADDR *addrp,
-						int *realnum,
-						void *raw_buffer);
-static void frame_saved_regs_register_unwind (struct frame_info *frame,
-					      void **cache,
-					      int regnum,
-					      int *optimized,
-					      enum lval_type *lval,
-					      CORE_ADDR *addrp,
-					      int *realnum,
-					      void *buffer);
-
-
 void _initialize_blockframe (void);
 
 /* A default FRAME_CHAIN_VALID, in the form that is suitable for most
@@ -182,140 +165,6 @@ inside_entry_func (CORE_ADDR pc)
 	  symfile_objfile->ei.entry_func_highpc > pc);
 }
 
-/* Info about the innermost stack frame (contents of FP register) */
-
-static struct frame_info *current_frame;
-
-/* Cache for frame addresses already read by gdb.  Valid only while
-   inferior is stopped.  Control variables for the frame cache should
-   be local to this module.  */
-
-static struct obstack frame_cache_obstack;
-
-void *
-frame_obstack_alloc (unsigned long size)
-{
-  return obstack_alloc (&frame_cache_obstack, size);
-}
-
-void
-frame_saved_regs_zalloc (struct frame_info *fi)
-{
-  fi->saved_regs = (CORE_ADDR *)
-    frame_obstack_alloc (SIZEOF_FRAME_SAVED_REGS);
-  memset (fi->saved_regs, 0, SIZEOF_FRAME_SAVED_REGS);
-}
-
-
-/* Return the innermost (currently executing) stack frame.  */
-
-struct frame_info *
-get_current_frame (void)
-{
-  if (current_frame == NULL)
-    {
-      if (target_has_stack)
-	current_frame = create_new_frame (read_fp (), read_pc ());
-      else
-	error ("No stack.");
-    }
-  return current_frame;
-}
-
-void
-set_current_frame (struct frame_info *frame)
-{
-  current_frame = frame;
-}
-
-
-/* Using the PC, select a mechanism for unwinding a frame returning
-   the previous frame.  The register unwind function should, on
-   demand, initialize the ->context object.  */
-
-static void
-set_unwind_by_pc (CORE_ADDR pc, CORE_ADDR fp,
-		  frame_register_unwind_ftype **unwind)
-{
-  if (!USE_GENERIC_DUMMY_FRAMES)
-    /* Still need to set this to something.  The ``info frame'' code
-       calls this function to find out where the saved registers are.
-       Hopefully this is robust enough to stop any core dumps and
-       return vaguely correct values..  */
-    *unwind = frame_saved_regs_register_unwind;
-  else if (PC_IN_CALL_DUMMY (pc, fp, fp))
-    *unwind = generic_call_dummy_register_unwind;
-  else
-    *unwind = frame_saved_regs_register_unwind;
-}
-
-/* Create an arbitrary (i.e. address specified by user) or innermost frame.
-   Always returns a non-NULL value.  */
-
-struct frame_info *
-create_new_frame (CORE_ADDR addr, CORE_ADDR pc)
-{
-  struct frame_info *fi;
-  char *name;
-
-  fi = (struct frame_info *)
-    obstack_alloc (&frame_cache_obstack,
-		   sizeof (struct frame_info));
-
-  /* Zero all fields by default.  */
-  memset (fi, 0, sizeof (struct frame_info));
-
-  fi->frame = addr;
-  fi->pc = pc;
-  find_pc_partial_function (pc, &name, (CORE_ADDR *) NULL, (CORE_ADDR *) NULL);
-  fi->signal_handler_caller = PC_IN_SIGTRAMP (fi->pc, name);
-
-  if (INIT_EXTRA_FRAME_INFO_P ())
-    INIT_EXTRA_FRAME_INFO (0, fi);
-
-  /* Select/initialize an unwind function.  */
-  set_unwind_by_pc (fi->pc, fi->frame, &fi->register_unwind);
-
-  return fi;
-}
-
-/* Return the frame that FRAME calls (NULL if FRAME is the innermost
-   frame).  */
-
-struct frame_info *
-get_next_frame (struct frame_info *frame)
-{
-  return frame->next;
-}
-
-/* Flush the entire frame cache.  */
-
-void
-flush_cached_frames (void)
-{
-  /* Since we can't really be sure what the first object allocated was */
-  obstack_free (&frame_cache_obstack, 0);
-  obstack_init (&frame_cache_obstack);
-
-  current_frame = NULL;		/* Invalidate cache */
-  select_frame (NULL);
-  annotate_frames_invalid ();
-}
-
-/* Flush the frame cache, and start a new one if necessary.  */
-
-void
-reinit_frame_cache (void)
-{
-  flush_cached_frames ();
-
-  /* FIXME: The inferior_ptid test is wrong if there is a corefile.  */
-  if (PIDGET (inferior_ptid) != 0)
-    {
-      select_frame (get_current_frame ());
-    }
-}
-
 /* Return nonzero if the function for this frame lacks a prologue.  Many
    machines can define FRAMELESS_FUNCTION_INVOCATION to just call this
    function.  */
@@ -347,188 +196,6 @@ frameless_look_for_prologue (struct frame_info *frame)
     return 0;
 }
 
-/* Return a structure containing various interesting information
-   about the frame that called NEXT_FRAME.  Returns NULL
-   if there is no such frame.  */
-
-struct frame_info *
-get_prev_frame (struct frame_info *next_frame)
-{
-  CORE_ADDR address = 0;
-  struct frame_info *prev;
-  int fromleaf = 0;
-  char *name;
-
-  /* If the requested entry is in the cache, return it.
-     Otherwise, figure out what the address should be for the entry
-     we're about to add to the cache. */
-
-  if (!next_frame)
-    {
-#if 0
-      /* This screws value_of_variable, which just wants a nice clean
-         NULL return from block_innermost_frame if there are no frames.
-         I don't think I've ever seen this message happen otherwise.
-         And returning NULL here is a perfectly legitimate thing to do.  */
-      if (!current_frame)
-	{
-	  error ("You haven't set up a process's stack to examine.");
-	}
-#endif
-
-      return current_frame;
-    }
-
-  /* If we have the prev one, return it */
-  if (next_frame->prev)
-    return next_frame->prev;
-
-  /* On some machines it is possible to call a function without
-     setting up a stack frame for it.  On these machines, we
-     define this macro to take two args; a frameinfo pointer
-     identifying a frame and a variable to set or clear if it is
-     or isn't leafless.  */
-
-  /* Still don't want to worry about this except on the innermost
-     frame.  This macro will set FROMLEAF if NEXT_FRAME is a
-     frameless function invocation.  */
-  if (!(next_frame->next))
-    {
-      fromleaf = FRAMELESS_FUNCTION_INVOCATION (next_frame);
-      if (fromleaf)
-	address = FRAME_FP (next_frame);
-    }
-
-  if (!fromleaf)
-    {
-      /* Two macros defined in tm.h specify the machine-dependent
-         actions to be performed here.
-         First, get the frame's chain-pointer.
-         If that is zero, the frame is the outermost frame or a leaf
-         called by the outermost frame.  This means that if start
-         calls main without a frame, we'll return 0 (which is fine
-         anyway).
-
-         Nope; there's a problem.  This also returns when the current
-         routine is a leaf of main.  This is unacceptable.  We move
-         this to after the ffi test; I'd rather have backtraces from
-         start go curfluy than have an abort called from main not show
-         main.  */
-      address = FRAME_CHAIN (next_frame);
-
-      /* FIXME: cagney/2002-06-08: There should be two tests here.
-         The first would check for a valid frame chain based on a user
-         selectable policy.  The default being ``stop at main'' (as
-         implemented by generic_func_frame_chain_valid()).  Other
-         policies would be available - stop at NULL, ....  The second
-         test, if provided by the target architecture, would check for
-         more exotic cases - most target architectures wouldn't bother
-         with this second case.  */
-      if (!FRAME_CHAIN_VALID (address, next_frame))
-	return 0;
-    }
-  if (address == 0)
-    return 0;
-
-  prev = (struct frame_info *)
-    obstack_alloc (&frame_cache_obstack,
-		   sizeof (struct frame_info));
-
-  /* Zero all fields by default.  */
-  memset (prev, 0, sizeof (struct frame_info));
-
-  if (next_frame)
-    next_frame->prev = prev;
-  prev->next = next_frame;
-  prev->frame = address;
-  prev->level = next_frame->level + 1;
-
-/* This change should not be needed, FIXME!  We should
-   determine whether any targets *need* INIT_FRAME_PC to happen
-   after INIT_EXTRA_FRAME_INFO and come up with a simple way to
-   express what goes on here.
-
-   INIT_EXTRA_FRAME_INFO is called from two places: create_new_frame
-   (where the PC is already set up) and here (where it isn't).
-   INIT_FRAME_PC is only called from here, always after
-   INIT_EXTRA_FRAME_INFO.
-
-   The catch is the MIPS, where INIT_EXTRA_FRAME_INFO requires the PC
-   value (which hasn't been set yet).  Some other machines appear to
-   require INIT_EXTRA_FRAME_INFO before they can do INIT_FRAME_PC.  Phoo.
-
-   We shouldn't need INIT_FRAME_PC_FIRST to add more complication to
-   an already overcomplicated part of GDB.   gnu@cygnus.com, 15Sep92.
-
-   Assuming that some machines need INIT_FRAME_PC after
-   INIT_EXTRA_FRAME_INFO, one possible scheme:
-
-   SETUP_INNERMOST_FRAME()
-   Default version is just create_new_frame (read_fp ()),
-   read_pc ()).  Machines with extra frame info would do that (or the
-   local equivalent) and then set the extra fields.
-   SETUP_ARBITRARY_FRAME(argc, argv)
-   Only change here is that create_new_frame would no longer init extra
-   frame info; SETUP_ARBITRARY_FRAME would have to do that.
-   INIT_PREV_FRAME(fromleaf, prev)
-   Replace INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC.  This should
-   also return a flag saying whether to keep the new frame, or
-   whether to discard it, because on some machines (e.g.  mips) it
-   is really awkward to have FRAME_CHAIN_VALID called *before*
-   INIT_EXTRA_FRAME_INFO (there is no good way to get information
-   deduced in FRAME_CHAIN_VALID into the extra fields of the new frame).
-   std_frame_pc(fromleaf, prev)
-   This is the default setting for INIT_PREV_FRAME.  It just does what
-   the default INIT_FRAME_PC does.  Some machines will call it from
-   INIT_PREV_FRAME (either at the beginning, the end, or in the middle).
-   Some machines won't use it.
-   kingdon@cygnus.com, 13Apr93, 31Jan94, 14Dec94.  */
-
-  INIT_FRAME_PC_FIRST (fromleaf, prev);
-
-  if (INIT_EXTRA_FRAME_INFO_P ())
-    INIT_EXTRA_FRAME_INFO (fromleaf, prev);
-
-  /* This entry is in the frame queue now, which is good since
-     FRAME_SAVED_PC may use that queue to figure out its value
-     (see tm-sparc.h).  We want the pc saved in the inferior frame. */
-  INIT_FRAME_PC (fromleaf, prev);
-
-  /* If ->frame and ->pc are unchanged, we are in the process of getting
-     ourselves into an infinite backtrace.  Some architectures check this
-     in FRAME_CHAIN or thereabouts, but it seems like there is no reason
-     this can't be an architecture-independent check.  */
-  if (next_frame != NULL)
-    {
-      if (prev->frame == next_frame->frame
-	  && prev->pc == next_frame->pc)
-	{
-	  next_frame->prev = NULL;
-	  obstack_free (&frame_cache_obstack, prev);
-	  return NULL;
-	}
-    }
-
-  /* Initialize the code used to unwind the frame PREV based on the PC
-     (and probably other architectural information).  The PC lets you
-     check things like the debug info at that point (dwarf2cfi?) and
-     use that to decide how the frame should be unwound.  */
-  set_unwind_by_pc (prev->pc, prev->frame, &prev->register_unwind);
-
-  find_pc_partial_function (prev->pc, &name,
-			    (CORE_ADDR *) NULL, (CORE_ADDR *) NULL);
-  if (PC_IN_SIGTRAMP (prev->pc, name))
-    prev->signal_handler_caller = 1;
-
-  return prev;
-}
-
-CORE_ADDR
-get_frame_pc (struct frame_info *frame)
-{
-  return frame->pc;
-}
-
 /* return the address of the PC for the given FRAME, ie the current PC value
    if FRAME is the innermost frame, or the address adjusted to point to the
    call instruction if not.  */
@@ -550,34 +217,6 @@ frame_address_in_block (struct frame_info *frame)
   return pc;
 }
 
-#ifdef FRAME_FIND_SAVED_REGS
-/* XXX - deprecated.  This is a compatibility function for targets
-   that do not yet implement FRAME_INIT_SAVED_REGS.  */
-/* Find the addresses in which registers are saved in FRAME.  */
-
-void
-get_frame_saved_regs (struct frame_info *frame,
-		      struct frame_saved_regs *saved_regs_addr)
-{
-  if (frame->saved_regs == NULL)
-    {
-      frame->saved_regs = (CORE_ADDR *)
-	frame_obstack_alloc (SIZEOF_FRAME_SAVED_REGS);
-    }
-  if (saved_regs_addr == NULL)
-    {
-      struct frame_saved_regs saved_regs;
-      FRAME_FIND_SAVED_REGS (frame, saved_regs);
-      memcpy (frame->saved_regs, &saved_regs, SIZEOF_FRAME_SAVED_REGS);
-    }
-  else
-    {
-      FRAME_FIND_SAVED_REGS (frame, *saved_regs_addr);
-      memcpy (frame->saved_regs, saved_regs_addr, SIZEOF_FRAME_SAVED_REGS);
-    }
-}
-#endif
-
 /* Return the innermost lexical block in execution
    in a specified stack frame.  The frame address is assumed valid.
 
@@ -1030,7 +669,7 @@ sigtramp_saved_pc (struct frame_info *frame)
 {
   CORE_ADDR sigcontext_addr;
   char *buf;
-  int ptrbytes = TARGET_PTR_BIT / TARGET_CHAR_BIT;
+  int ptrbytes = TYPE_LENGTH (builtin_type_void_func_ptr);
   int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
 
   buf = alloca (ptrbytes);
@@ -1046,7 +685,7 @@ sigtramp_saved_pc (struct frame_info *frame)
   /* Don't cause a memory_error when accessing sigcontext in case the stack
      layout has changed or the stack is corrupt.  */
   target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
-  return extract_typed_address (buf, builtin_type_void_data_ptr);
+  return extract_typed_address (buf, builtin_type_void_func_ptr);
 }
 #endif /* SIGCONTEXT_PC_OFFSET */
 
@@ -1108,244 +747,6 @@ pc_in_call_dummy_at_entry_point (CORE_ADDR pc, CORE_ADDR sp,
 }
 
 
-/*
- * GENERIC DUMMY FRAMES
- * 
- * The following code serves to maintain the dummy stack frames for
- * inferior function calls (ie. when gdb calls into the inferior via
- * call_function_by_hand).  This code saves the machine state before 
- * the call in host memory, so we must maintain an independent stack 
- * and keep it consistant etc.  I am attempting to make this code 
- * generic enough to be used by many targets.
- *
- * The cheapest and most generic way to do CALL_DUMMY on a new target
- * is probably to define CALL_DUMMY to be empty, CALL_DUMMY_LENGTH to
- * zero, and CALL_DUMMY_LOCATION to AT_ENTRY.  Then you must remember
- * to define PUSH_RETURN_ADDRESS, because no call instruction will be
- * being executed by the target.  Also FRAME_CHAIN_VALID as
- * generic_{file,func}_frame_chain_valid and FIX_CALL_DUMMY as
- * generic_fix_call_dummy.  */
-
-/* Dummy frame.  This saves the processor state just prior to setting
-   up the inferior function call.  Older targets save the registers
-   on the target stack (but that really slows down function calls).  */
-
-struct dummy_frame
-{
-  struct dummy_frame *next;
-
-  CORE_ADDR pc;
-  CORE_ADDR fp;
-  CORE_ADDR sp;
-  CORE_ADDR top;
-  struct regcache *regcache;
-
-  /* Address range of the call dummy code.  Look for PC in the range
-     [LO..HI) (after allowing for DECR_PC_AFTER_BREAK).  */
-  CORE_ADDR call_lo;
-  CORE_ADDR call_hi;
-};
-
-static struct dummy_frame *dummy_frame_stack = NULL;
-
-/* Function: find_dummy_frame(pc, fp, sp)
-
-   Search the stack of dummy frames for one matching the given PC and
-   FP/SP.  Unlike PC_IN_CALL_DUMMY, this function doesn't need to
-   adjust for DECR_PC_AFTER_BREAK.  This is because it is only legal
-   to call this function after the PC has been adjusted.  */
-
-static struct regcache *
-generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp)
-{
-  struct dummy_frame *dummyframe;
-
-  for (dummyframe = dummy_frame_stack; dummyframe != NULL;
-       dummyframe = dummyframe->next)
-    {
-      /* Does the PC fall within the dummy frame's breakpoint
-         instruction.  If not, discard this one.  */
-      if (!(pc >= dummyframe->call_lo && pc < dummyframe->call_hi))
-	continue;
-      /* Does the FP match?  */
-      if (dummyframe->top != 0)
-	{
-	  /* If the target architecture explicitly saved the
-	     top-of-stack before the inferior function call, assume
-	     that that same architecture will always pass in an FP
-	     (frame base) value that eactly matches that saved TOS.
-	     Don't check the saved SP and SP as they can lead to false
-	     hits.  */
-	  if (fp != dummyframe->top)
-	    continue;
-	}
-      else
-	{
-	  /* An older target that hasn't explicitly or implicitly
-             saved the dummy frame's top-of-stack.  Try matching the
-             FP against the saved SP and FP.  NOTE: If you're trying
-             to fix a problem with GDB not correctly finding a dummy
-             frame, check the comments that go with FRAME_ALIGN() and
-             SAVE_DUMMY_FRAME_TOS().  */
-	  if (fp != dummyframe->fp && fp != dummyframe->sp)
-	    continue;
-	}
-      /* The FP matches this dummy frame.  */
-      return dummyframe->regcache;
-    }
-
-  return 0;
-}
-
-char *
-deprecated_generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp)
-{
-  struct regcache *regcache = generic_find_dummy_frame (pc, fp);
-  if (regcache == NULL)
-    return NULL;
-  return deprecated_grub_regcache_for_registers (regcache);
-}
-
-/* Function: pc_in_call_dummy (pc, sp, fp)
-
-   Return true if the PC falls in a dummy frame created by gdb for an
-   inferior call.  The code below which allows DECR_PC_AFTER_BREAK is
-   for infrun.c, which may give the function a PC without that
-   subtracted out.  */
-
-int
-generic_pc_in_call_dummy (CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR fp)
-{
-  struct dummy_frame *dummyframe;
-  for (dummyframe = dummy_frame_stack;
-       dummyframe != NULL;
-       dummyframe = dummyframe->next)
-    {
-      if ((pc >= dummyframe->call_lo)
-	  && (pc < dummyframe->call_hi + DECR_PC_AFTER_BREAK))
-	return 1;
-    }
-  return 0;
-}
-
-/* Function: read_register_dummy 
-   Find a saved register from before GDB calls a function in the inferior */
-
-CORE_ADDR
-deprecated_read_register_dummy (CORE_ADDR pc, CORE_ADDR fp, int regno)
-{
-  struct regcache *dummy_regs = generic_find_dummy_frame (pc, fp);
-
-  if (dummy_regs)
-    {
-      /* NOTE: cagney/2002-08-12: Replaced a call to
-	 regcache_raw_read_as_address() with a call to
-	 regcache_cooked_read_unsigned().  The old, ...as_address
-	 function was eventually calling extract_unsigned_integer (via
-	 extract_address) to unpack the registers value.  The below is
-	 doing an unsigned extract so that it is functionally
-	 equivalent.  The read needs to be cooked as, otherwise, it
-	 will never correctly return the value of a register in the
-	 [NUM_REGS .. NUM_REGS+NUM_PSEUDO_REGS) range.  */
-      ULONGEST val;
-      regcache_cooked_read_unsigned (dummy_regs, regno, &val);
-      return val;
-    }
-  else
-    return 0;
-}
-
-/* Save all the registers on the dummy frame stack.  Most ports save the
-   registers on the target stack.  This results in lots of unnecessary memory
-   references, which are slow when debugging via a serial line.  Instead, we
-   save all the registers internally, and never write them to the stack.  The
-   registers get restored when the called function returns to the entry point,
-   where a breakpoint is laying in wait.  */
-
-void
-generic_push_dummy_frame (void)
-{
-  struct dummy_frame *dummy_frame;
-  CORE_ADDR fp = (get_current_frame ())->frame;
-
-  /* check to see if there are stale dummy frames, 
-     perhaps left over from when a longjump took us out of a 
-     function that was called by the debugger */
-
-  dummy_frame = dummy_frame_stack;
-  while (dummy_frame)
-    if (INNER_THAN (dummy_frame->fp, fp))	/* stale -- destroy! */
-      {
-	dummy_frame_stack = dummy_frame->next;
-	regcache_xfree (dummy_frame->regcache);
-	xfree (dummy_frame);
-	dummy_frame = dummy_frame_stack;
-      }
-    else
-      dummy_frame = dummy_frame->next;
-
-  dummy_frame = xmalloc (sizeof (struct dummy_frame));
-  dummy_frame->regcache = regcache_xmalloc (current_gdbarch);
-
-  dummy_frame->pc = read_pc ();
-  dummy_frame->sp = read_sp ();
-  dummy_frame->top = 0;
-  dummy_frame->fp = fp;
-  regcache_cpy (dummy_frame->regcache, current_regcache);
-  dummy_frame->next = dummy_frame_stack;
-  dummy_frame_stack = dummy_frame;
-}
-
-void
-generic_save_dummy_frame_tos (CORE_ADDR sp)
-{
-  dummy_frame_stack->top = sp;
-}
-
-/* Record the upper/lower bounds on the address of the call dummy.  */
-
-void
-generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi)
-{
-  dummy_frame_stack->call_lo = lo;
-  dummy_frame_stack->call_hi = hi;
-}
-
-/* Restore the machine state from either the saved dummy stack or a
-   real stack frame. */
-
-void
-generic_pop_current_frame (void (*popper) (struct frame_info * frame))
-{
-  struct frame_info *frame = get_current_frame ();
-
-  if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
-    generic_pop_dummy_frame ();
-  else
-    (*popper) (frame);
-}
-
-/* Function: pop_dummy_frame
-   Restore the machine state from a saved dummy stack frame. */
-
-void
-generic_pop_dummy_frame (void)
-{
-  struct dummy_frame *dummy_frame = dummy_frame_stack;
-
-  /* FIXME: what if the first frame isn't the right one, eg..
-     because one call-by-hand function has done a longjmp into another one? */
-
-  if (!dummy_frame)
-    error ("Can't pop dummy frame!");
-  dummy_frame_stack = dummy_frame->next;
-  regcache_cpy (current_regcache, dummy_frame->regcache);
-  flush_cached_frames ();
-
-  regcache_xfree (dummy_frame->regcache);
-  xfree (dummy_frame);
-}
-
 /* Function: frame_chain_valid 
    Returns true for a user frame or a call_function_by_hand dummy frame,
    and false for the CRT0 start-up frame.  Purpose is to terminate backtrace */
@@ -1374,256 +775,3 @@ generic_func_frame_chain_valid (CORE_ADDR fp, struct frame_info *fi)
 	    && !inside_entry_func ((fi)->pc));
 }
 
-/* Function: fix_call_dummy
-   Stub function.  Generic dummy frames typically do not need to fix
-   the frame being created */
-
-void
-generic_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
-			struct value **args, struct type *type, int gcc_p)
-{
-  return;
-}
-
-/* Given a call-dummy dummy-frame, return the registers.  Here the
-   register value is taken from the local copy of the register buffer.  */
-
-static void
-generic_call_dummy_register_unwind (struct frame_info *frame, void **cache,
-				    int regnum, int *optimized,
-				    enum lval_type *lvalp, CORE_ADDR *addrp,
-				    int *realnum, void *bufferp)
-{
-  gdb_assert (frame != NULL);
-  gdb_assert (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame));
-
-  /* Describe the register's location.  Generic dummy frames always
-     have the register value in an ``expression''.  */
-  *optimized = 0;
-  *lvalp = not_lval;
-  *addrp = 0;
-  *realnum = -1;
-
-  /* If needed, find and return the value of the register.  */
-  if (bufferp != NULL)
-    {
-      struct regcache *registers;
-#if 1
-      /* Get the address of the register buffer that contains all the
-	 saved registers for this dummy frame.  Cache that address.  */
-      registers = (*cache);
-      if (registers == NULL)
-	{
-	  registers = generic_find_dummy_frame (frame->pc, frame->frame);
-	  (*cache) = registers;
-	}
-#else
-      /* Get the address of the register buffer that contains the
-         saved registers and then extract the value from that.  */
-      registers = generic_find_dummy_frame (frame->pc, frame->frame);
-#endif
-      gdb_assert (registers != NULL);
-      /* Return the actual value.  */
-      /* Use the regcache_cooked_read() method so that it, on the fly,
-         constructs either a raw or pseudo register from the raw
-         register cache.  */
-      regcache_cooked_read (registers, regnum, bufferp);
-    }
-}
-
-/* Return the register saved in the simplistic ``saved_regs'' cache.
-   If the value isn't here AND a value is needed, try the next inner
-   most frame.  */
-
-static void
-frame_saved_regs_register_unwind (struct frame_info *frame, void **cache,
-				  int regnum, int *optimizedp,
-				  enum lval_type *lvalp, CORE_ADDR *addrp,
-				  int *realnump, void *bufferp)
-{
-  /* There is always a frame at this point.  And THIS is the frame
-     we're interested in.  */
-  gdb_assert (frame != NULL);
-  /* If we're using generic dummy frames, we'd better not be in a call
-     dummy.  (generic_call_dummy_register_unwind ought to have been called
-     instead.)  */
-  gdb_assert (!(USE_GENERIC_DUMMY_FRAMES
-                && PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)));
-
-  /* Load the saved_regs register cache.  */
-  if (frame->saved_regs == NULL)
-    FRAME_INIT_SAVED_REGS (frame);
-
-  if (frame->saved_regs != NULL
-      && frame->saved_regs[regnum] != 0)
-    {
-      if (regnum == SP_REGNUM)
-	{
-	  /* SP register treated specially.  */
-	  *optimizedp = 0;
-	  *lvalp = not_lval;
-	  *addrp = 0;
-	  *realnump = -1;
-	  if (bufferp != NULL)
-	    store_address (bufferp, REGISTER_RAW_SIZE (regnum),
-			   frame->saved_regs[regnum]);
-	}
-      else
-	{
-	  /* Any other register is saved in memory, fetch it but cache
-             a local copy of its value.  */
-	  *optimizedp = 0;
-	  *lvalp = lval_memory;
-	  *addrp = frame->saved_regs[regnum];
-	  *realnump = -1;
-	  if (bufferp != NULL)
-	    {
-#if 1
-	      /* Save each register value, as it is read in, in a
-                 frame based cache.  */
-	      void **regs = (*cache);
-	      if (regs == NULL)
-		{
-		  int sizeof_cache = ((NUM_REGS + NUM_PSEUDO_REGS)
-				      * sizeof (void *));
-		  regs = frame_obstack_alloc (sizeof_cache);
-		  memset (regs, 0, sizeof_cache);
-		  (*cache) = regs;
-		}
-	      if (regs[regnum] == NULL)
-		{
-		  regs[regnum]
-		    = frame_obstack_alloc (REGISTER_RAW_SIZE (regnum));
-		  read_memory (frame->saved_regs[regnum], regs[regnum],
-			       REGISTER_RAW_SIZE (regnum));
-		}
-	      memcpy (bufferp, regs[regnum], REGISTER_RAW_SIZE (regnum));
-#else
-	      /* Read the value in from memory.  */
-	      read_memory (frame->saved_regs[regnum], bufferp,
-			   REGISTER_RAW_SIZE (regnum));
-#endif
-	    }
-	}
-      return;
-    }
-
-  /* No luck, assume this and the next frame have the same register
-     value.  If a value is needed, pass the request on down the chain;
-     otherwise just return an indication that the value is in the same
-     register as the next frame.  */
-  if (bufferp == NULL)
-    {
-      *optimizedp = 0;
-      *lvalp = lval_register;
-      *addrp = 0;
-      *realnump = regnum;
-    }
-  else
-    {
-      frame_register_unwind (frame->next, regnum, optimizedp, lvalp, addrp,
-			     realnump, bufferp);
-    }
-}
-
-/* Function: get_saved_register
-   Find register number REGNUM relative to FRAME and put its (raw,
-   target format) contents in *RAW_BUFFER.  
-
-   Set *OPTIMIZED if the variable was optimized out (and thus can't be
-   fetched).  Note that this is never set to anything other than zero
-   in this implementation.
-
-   Set *LVAL to lval_memory, lval_register, or not_lval, depending on
-   whether the value was fetched from memory, from a register, or in a
-   strange and non-modifiable way (e.g. a frame pointer which was
-   calculated rather than fetched).  We will use not_lval for values
-   fetched from generic dummy frames.
-
-   Set *ADDRP to the address, either in memory or as a REGISTER_BYTE
-   offset into the registers array.  If the value is stored in a dummy
-   frame, set *ADDRP to zero.
-
-   To use this implementation, define a function called
-   "get_saved_register" in your target code, which simply passes all
-   of its arguments to this function.
-
-   The argument RAW_BUFFER must point to aligned memory.  */
-
-void
-generic_get_saved_register (char *raw_buffer, int *optimized, CORE_ADDR *addrp,
-			    struct frame_info *frame, int regnum,
-			    enum lval_type *lval)
-{
-  if (!target_has_registers)
-    error ("No registers.");
-
-  /* Normal systems don't optimize out things with register numbers.  */
-  if (optimized != NULL)
-    *optimized = 0;
-
-  if (addrp)			/* default assumption: not found in memory */
-    *addrp = 0;
-
-  /* Note: since the current frame's registers could only have been
-     saved by frames INTERIOR TO the current frame, we skip examining
-     the current frame itself: otherwise, we would be getting the
-     previous frame's registers which were saved by the current frame.  */
-
-  while (frame && ((frame = frame->next) != NULL))
-    {
-      if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
-	{
-	  if (lval)		/* found it in a CALL_DUMMY frame */
-	    *lval = not_lval;
-	  if (raw_buffer)
-	    /* FIXME: cagney/2002-06-26: This should be via the
-	       gdbarch_register_read() method so that it, on the fly,
-	       constructs either a raw or pseudo register from the raw
-	       register cache.  */
-	    regcache_raw_read (generic_find_dummy_frame (frame->pc,
-							 frame->frame),
-			       regnum, raw_buffer);
-	  return;
-	}
-
-      FRAME_INIT_SAVED_REGS (frame);
-      if (frame->saved_regs != NULL
-	  && frame->saved_regs[regnum] != 0)
-	{
-	  if (lval)		/* found it saved on the stack */
-	    *lval = lval_memory;
-	  if (regnum == SP_REGNUM)
-	    {
-	      if (raw_buffer)	/* SP register treated specially */
-		store_address (raw_buffer, REGISTER_RAW_SIZE (regnum),
-			       frame->saved_regs[regnum]);
-	    }
-	  else
-	    {
-	      if (addrp)	/* any other register */
-		*addrp = frame->saved_regs[regnum];
-	      if (raw_buffer)
-		read_memory (frame->saved_regs[regnum], raw_buffer,
-			     REGISTER_RAW_SIZE (regnum));
-	    }
-	  return;
-	}
-    }
-
-  /* If we get thru the loop to this point, it means the register was
-     not saved in any frame.  Return the actual live-register value.  */
-
-  if (lval)			/* found it in a live register */
-    *lval = lval_register;
-  if (addrp)
-    *addrp = REGISTER_BYTE (regnum);
-  if (raw_buffer)
-    read_register_gen (regnum, raw_buffer);
-}
-
-void
-_initialize_blockframe (void)
-{
-  obstack_init (&frame_cache_obstack);
-}