Initial creation of sourceware repository

1 files changed, 0 insertions, 1800 deletions

diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
deleted file mode 100644
index 2323158..0000000
--- a/gdb/rs6000-tdep.c
+++ /dev/null
@@ -1,1800 +0,0 @@
-/* Target-dependent code for GDB, the GNU debugger.
-   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997
-   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 "symtab.h"
-#include "target.h"
-#include "gdbcore.h"
-#include "gdbcmd.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "xcoffsolib.h"
-
-extern int errno;
-
-/* Breakpoint shadows for the single step instructions will be kept here. */
-
-static struct sstep_breaks {
-  /* Address, or 0 if this is not in use.  */
-  CORE_ADDR address;
-  /* Shadow contents.  */
-  char data[4];
-} stepBreaks[2];
-
-/* Hook for determining the TOC address when calling functions in the
-   inferior under AIX. The initialization code in rs6000-nat.c sets
-   this hook to point to find_toc_address.  */
-
-CORE_ADDR (*find_toc_address_hook) PARAMS ((CORE_ADDR)) = NULL;
-
-/* Static function prototypes */
-
-static CORE_ADDR branch_dest PARAMS ((int opcode, int instr, CORE_ADDR pc,
-				      CORE_ADDR safety));
-
-static void frame_get_saved_regs PARAMS ((struct frame_info *fi,
-					  struct rs6000_framedata *fdatap));
-
-static void pop_dummy_frame PARAMS ((void));
-
-static CORE_ADDR frame_initial_stack_address PARAMS ((struct frame_info *));
-
-/* Fill in fi->saved_regs */
-
-struct frame_extra_info
-{
-  /* Functions calling alloca() change the value of the stack
-     pointer. We need to use initial stack pointer (which is saved in
-     r31 by gcc) in such cases. If a compiler emits traceback table,
-     then we should use the alloca register specified in traceback
-     table. FIXME. */
-  CORE_ADDR initial_sp;			/* initial stack pointer. */ \
-};
-
-void
-rs6000_init_extra_frame_info (fromleaf, fi)
-     int fromleaf;
-     struct frame_info *fi;
-{
-  fi->extra_info = (struct frame_extra_info*)
-    frame_obstack_alloc (sizeof (struct frame_extra_info));
-  fi->extra_info->initial_sp = 0;
-  if (fi->next != (CORE_ADDR) 0
-      && fi->pc < TEXT_SEGMENT_BASE)
-    /* We're in get_prev_frame_info */
-    /* and this is a special signal frame.  */
-    /* (fi->pc will be some low address in the kernel, */
-    /*  to which the signal handler returns).  */
-    fi->signal_handler_caller = 1;
-}
-
-
-void
-rs6000_frame_init_saved_regs (fi)
-     struct frame_info *fi;
-{
-  frame_get_saved_regs (fi, NULL);
-}
-
-CORE_ADDR
-rs6000_frame_args_address (fi)
-     struct frame_info *fi;
-{
-  if (fi->extra_info->initial_sp != 0)
-    return fi->extra_info->initial_sp;
-  else
-    return frame_initial_stack_address (fi);
-}
-
-
-/* Calculate the destination of a branch/jump.  Return -1 if not a branch.  */
-
-static CORE_ADDR
-branch_dest (opcode, instr, pc, safety)
-     int opcode;
-     int instr;
-     CORE_ADDR pc;
-     CORE_ADDR safety;
-{
-  CORE_ADDR dest;
-  int immediate;
-  int absolute;
-  int ext_op;
-
-  absolute = (int) ((instr >> 1) & 1);
-
-  switch (opcode) {
-     case 18	:
-	immediate = ((instr & ~3) << 6) >> 6;	/* br unconditional */
-	if (absolute)
-	  dest = immediate;	
-	else
-	  dest = pc + immediate;
-	break;
-
-     case 16	:  
-        immediate = ((instr & ~3) << 16) >> 16;	/* br conditional */
-	if (absolute)
-	  dest = immediate;	
-	else
-	  dest = pc + immediate;
-	break;
-
-      case 19	:
-	ext_op = (instr>>1) & 0x3ff;
-
-	if (ext_op == 16)			/* br conditional register */
-	  {
-	    dest = read_register (LR_REGNUM) & ~3;
-
-	    /* If we are about to return from a signal handler, dest is
-	       something like 0x3c90.  The current frame is a signal handler
-	       caller frame, upon completion of the sigreturn system call
-	       execution will return to the saved PC in the frame.  */
-	    if (dest < TEXT_SEGMENT_BASE)
-	      {
-		struct frame_info *fi;
-
-		fi = get_current_frame ();
-		if (fi != NULL)
-		  dest = read_memory_integer (fi->frame + SIG_FRAME_PC_OFFSET,
-					      4);
-	      }
-	  }
-
-	else if (ext_op == 528)			/* br cond to count reg */
-	  {
-	    dest = read_register (CTR_REGNUM) & ~3;
-
-	    /* If we are about to execute a system call, dest is something
-	       like 0x22fc or 0x3b00.  Upon completion the system call
-	       will return to the address in the link register.  */
-	    if (dest < TEXT_SEGMENT_BASE)
-	      dest = read_register (LR_REGNUM) & ~3;
-	  }
-	else return -1; 
-	break;
-	
-       default: return -1;
-  }
-  return (dest < TEXT_SEGMENT_BASE) ? safety : dest;
-}
-
-
-/* Sequence of bytes for breakpoint instruction.  */
-
-#define BIG_BREAKPOINT { 0x7d, 0x82, 0x10, 0x08 }
-#define LITTLE_BREAKPOINT { 0x08, 0x10, 0x82, 0x7d }
-
-unsigned char *
-rs6000_breakpoint_from_pc (bp_addr, bp_size)
-     CORE_ADDR *bp_addr;
-     int *bp_size;
-{
-  static unsigned char big_breakpoint[] = BIG_BREAKPOINT;
-  static unsigned char little_breakpoint[] = LITTLE_BREAKPOINT;
-  *bp_size = 4;
-  if (TARGET_BYTE_ORDER == BIG_ENDIAN)
-    return big_breakpoint;
-  else
-    return little_breakpoint;
-}
-
-
-/* AIX does not support PT_STEP. Simulate it. */
-
-void
-rs6000_software_single_step (signal, insert_breakpoints_p)
-     enum target_signal signal;
-     int insert_breakpoints_p;
-{
-#define	INSNLEN(OPCODE)	 4
-
-  static char le_breakp[] = LITTLE_BREAKPOINT;
-  static char be_breakp[] = BIG_BREAKPOINT;
-  char *breakp = TARGET_BYTE_ORDER == BIG_ENDIAN ? be_breakp : le_breakp;
-  int ii, insn;
-  CORE_ADDR loc;
-  CORE_ADDR breaks[2];
-  int opcode;
-
-  if (insert_breakpoints_p) {
-
-    loc = read_pc ();
-
-    insn = read_memory_integer (loc, 4);
-
-    breaks[0] = loc + INSNLEN(insn);
-    opcode = insn >> 26;
-    breaks[1] = branch_dest (opcode, insn, loc, breaks[0]);
-
-    /* Don't put two breakpoints on the same address. */
-    if (breaks[1] == breaks[0])
-      breaks[1] = -1;
-
-    stepBreaks[1].address = 0;
-
-    for (ii=0; ii < 2; ++ii) {
-
-      /* ignore invalid breakpoint. */
-      if ( breaks[ii] == -1)
-        continue;
-
-      read_memory (breaks[ii], stepBreaks[ii].data, 4);
-
-      write_memory (breaks[ii], breakp, 4);
-      stepBreaks[ii].address = breaks[ii];
-    }  
-
-  } else {
-
-    /* remove step breakpoints. */
-    for (ii=0; ii < 2; ++ii)
-      if (stepBreaks[ii].address != 0)
-        write_memory 
-           (stepBreaks[ii].address, stepBreaks[ii].data, 4);
-
-  }
-  errno = 0;			/* FIXME, don't ignore errors! */
-			/* What errors?  {read,write}_memory call error().  */
-}
-
-
-/* return pc value after skipping a function prologue and also return
-   information about a function frame.
-
-   in struct rs6000_framedata fdata:
-    - frameless is TRUE, if function does not have a frame.
-    - nosavedpc is TRUE, if function does not save %pc value in its frame.
-    - offset is the initial size of this stack frame --- the amount by
-      which we decrement the sp to allocate the frame.
-    - saved_gpr is the number of the first saved gpr.
-    - saved_fpr is the number of the first saved fpr.
-    - alloca_reg is the number of the register used for alloca() handling.
-      Otherwise -1.
-    - gpr_offset is the offset of the first saved gpr from the previous frame.
-    - fpr_offset is the offset of the first saved fpr from the previous frame.
-    - lr_offset is the offset of the saved lr
-    - cr_offset is the offset of the saved cr
-*/
-
-#define SIGNED_SHORT(x) 						\
-  ((sizeof (short) == 2)						\
-   ? ((int)(short)(x))							\
-   : ((int)((((x) & 0xffff) ^ 0x8000) - 0x8000)))
-
-#define GET_SRC_REG(x) (((x) >> 21) & 0x1f)
-
-CORE_ADDR
-skip_prologue (pc, fdata)
-     CORE_ADDR pc;
-     struct rs6000_framedata *fdata; 
-{
-  CORE_ADDR orig_pc = pc;
-  char buf[4];
-  unsigned long op;
-  long offset = 0;
-  int lr_reg = 0;
-  int cr_reg = 0;
-  int reg;
-  int framep = 0;
-  int minimal_toc_loaded = 0;
-  static struct rs6000_framedata zero_frame;
-
-  *fdata = zero_frame;
-  fdata->saved_gpr = -1;
-  fdata->saved_fpr = -1;
-  fdata->alloca_reg = -1;
-  fdata->frameless = 1;
-  fdata->nosavedpc = 1;
-
-  if (target_read_memory (pc, buf, 4))
-    return pc;			/* Can't access it -- assume no prologue. */
-
-  /* Assume that subsequent fetches can fail with low probability.  */
-  pc -= 4;
-  for (;;)
-    {
-      pc += 4;
-      op = read_memory_integer (pc, 4);
-
-      if ((op & 0xfc1fffff) == 0x7c0802a6) {		/* mflr Rx */
-	lr_reg = (op & 0x03e00000) | 0x90010000;
-	continue;
-
-      } else if ((op & 0xfc1fffff) == 0x7c000026) {	/* mfcr Rx */
-	cr_reg = (op & 0x03e00000) | 0x90010000;
-	continue;
-
-      } else if ((op & 0xfc1f0000) == 0xd8010000) {	/* stfd Rx,NUM(r1) */
-	reg = GET_SRC_REG (op);
-	if (fdata->saved_fpr == -1 || fdata->saved_fpr > reg) {
-	  fdata->saved_fpr = reg;
-	  fdata->fpr_offset = SIGNED_SHORT (op) + offset;
-	}
-	continue;
-
-      } else if (((op & 0xfc1f0000) == 0xbc010000) || 	/* stm Rx, NUM(r1) */
-		 ((op & 0xfc1f0000) == 0x90010000 &&	/* st rx,NUM(r1), 
-							   rx >= r13 */
-		  (op & 0x03e00000) >= 0x01a00000)) {
-
-	reg = GET_SRC_REG (op);
-	if (fdata->saved_gpr == -1 || fdata->saved_gpr > reg) {
-	  fdata->saved_gpr = reg;
-	  fdata->gpr_offset = SIGNED_SHORT (op) + offset;
-	}
-	continue;
-
-      } else if ((op & 0xffff0000) == 0x3c000000) {	/* addis 0,0,NUM, used
-							   for >= 32k frames */
-	fdata->offset = (op & 0x0000ffff) << 16;
-	fdata->frameless = 0;
-	continue;
-
-      } else if ((op & 0xffff0000) == 0x60000000) {	/* ori 0,0,NUM, 2nd ha
-							   lf of >= 32k frames */
-	fdata->offset |= (op & 0x0000ffff);
-	fdata->frameless = 0;
-	continue;
-
-      } else if ((op & 0xffff0000) == lr_reg) {		/* st Rx,NUM(r1) 
-							   where Rx == lr */
-	fdata->lr_offset = SIGNED_SHORT (op) + offset;
-	fdata->nosavedpc = 0;
-	lr_reg = 0;
-	continue;
-
-      } else if ((op & 0xffff0000) == cr_reg) {		/* st Rx,NUM(r1) 
-							   where Rx == cr */
-	fdata->cr_offset = SIGNED_SHORT (op) + offset;
-	cr_reg = 0;
-	continue;
-
-      } else if (op == 0x48000005) {			/* bl .+4 used in 
-							   -mrelocatable */
-	continue;
-
-      } else if (op == 0x48000004) {			/* b .+4 (xlc) */
-	break;
-
-      } else if (((op & 0xffff0000) == 0x801e0000 ||	/* lwz 0,NUM(r30), used
-							   in V.4 -mrelocatable */
-		  op == 0x7fc0f214) &&			/* add r30,r0,r30, used
-							   in V.4 -mrelocatable */
-		 lr_reg == 0x901e0000) {
-	continue;
-
-      } else if ((op & 0xffff0000) == 0x3fc00000 ||	/* addis 30,0,foo@ha, used
-							   in V.4 -mminimal-toc */
-		 (op & 0xffff0000) == 0x3bde0000) {	/* addi 30,30,foo@l */
-	continue;
-
-      } else if ((op & 0xfc000000) == 0x48000000) {	/* bl foo, 
-							   to save fprs??? */
-
-	fdata->frameless = 0;
-	/* Don't skip over the subroutine call if it is not within the first
-	   three instructions of the prologue.  */
-	if ((pc - orig_pc) > 8)
-	  break;
-
-	op = read_memory_integer (pc+4, 4);
-
-	/* At this point, make sure this is not a trampoline function
-	   (a function that simply calls another functions, and nothing else).
-	   If the next is not a nop, this branch was part of the function
-	   prologue. */
-
-	if (op == 0x4def7b82 || op == 0)		/* crorc 15, 15, 15 */
-	  break;					/* don't skip over 
-							   this branch */
-	continue;
-
-      /* update stack pointer */
-      } else if ((op & 0xffff0000) == 0x94210000) {	/* stu r1,NUM(r1) */
-	fdata->frameless = 0;
-	fdata->offset = SIGNED_SHORT (op);
-	offset = fdata->offset;
-	continue;
-
-      } else if (op == 0x7c21016e) {			/* stwux 1,1,0 */
-	fdata->frameless = 0;
-	offset = fdata->offset;
-	continue;
-
-      /* Load up minimal toc pointer */
-      } else if ((op >> 22) == 0x20f
-	         && ! minimal_toc_loaded) {	/* l r31,... or l r30,... */
-	minimal_toc_loaded = 1;
-	continue;
-
-      /* store parameters in stack */
-      } else if ((op & 0xfc1f0000) == 0x90010000 ||	/* st rx,NUM(r1) */
-		 (op & 0xfc1f0000) == 0xd8010000 ||	/* stfd Rx,NUM(r1) */
-		 (op & 0xfc1f0000) == 0xfc010000) {	/* frsp, fp?,NUM(r1) */
-	continue;
-
-      /* store parameters in stack via frame pointer */
-      } else if (framep &&
-		 ((op & 0xfc1f0000) == 0x901f0000 ||	/* st rx,NUM(r1) */
-		 (op & 0xfc1f0000) == 0xd81f0000 ||	/* stfd Rx,NUM(r1) */
-		 (op & 0xfc1f0000) == 0xfc1f0000)) {	/* frsp, fp?,NUM(r1) */
-	continue;
-
-      /* Set up frame pointer */
-      } else if (op == 0x603f0000			/* oril r31, r1, 0x0 */
-		 || op == 0x7c3f0b78) {			/* mr r31, r1 */
-	fdata->frameless = 0;
-	framep = 1;
-	fdata->alloca_reg = 31;
-	continue;
-
-      /* Another way to set up the frame pointer.  */
-      } else if ((op & 0xfc1fffff) == 0x38010000) {	/* addi rX, r1, 0x0 */
-	fdata->frameless = 0;
-	framep = 1;
-	fdata->alloca_reg = (op & ~0x38010000) >> 21;
-	continue;
-
-      } else {
-	break;
-      }
-    }
-
-#if 0
-/* I have problems with skipping over __main() that I need to address
- * sometime. Previously, I used to use misc_function_vector which
- * didn't work as well as I wanted to be.  -MGO */
-
-  /* If the first thing after skipping a prolog is a branch to a function,
-     this might be a call to an initializer in main(), introduced by gcc2.
-     We'd like to skip over it as well. Fortunately, xlc does some extra
-     work before calling a function right after a prologue, thus we can
-     single out such gcc2 behaviour. */
-     
-
-  if ((op & 0xfc000001) == 0x48000001) { /* bl foo, an initializer function? */
-    op = read_memory_integer (pc+4, 4);
-
-    if (op == 0x4def7b82) {		/* cror 0xf, 0xf, 0xf (nop) */
-
-      /* check and see if we are in main. If so, skip over this initializer
-         function as well. */
-
-      tmp = find_pc_misc_function (pc);
-      if (tmp >= 0 && STREQ (misc_function_vector [tmp].name, "main"))
-        return pc + 8;
-    }
-  }
-#endif /* 0 */
- 
-  fdata->offset = - fdata->offset;
-  return pc;
-}
-
-
-/*************************************************************************
-  Support for creating pushind a dummy frame into the stack, and popping
-  frames, etc. 
-*************************************************************************/
-
-/* The total size of dummy frame is 436, which is;
-
-	32 gpr's	- 128 bytes
-	32 fpr's	- 256   "
-	7  the rest	- 28    "
-	and 24 extra bytes for the callee's link area. The last 24 bytes
-	for the link area might not be necessary, since it will be taken
-	care of by push_arguments(). */
-
-#define DUMMY_FRAME_SIZE 436
-
-#define	DUMMY_FRAME_ADDR_SIZE 10
-
-/* Make sure you initialize these in somewhere, in case gdb gives up what it
-   was debugging and starts debugging something else. FIXMEibm */
-
-static int dummy_frame_count = 0;
-static int dummy_frame_size = 0;
-static CORE_ADDR *dummy_frame_addr = 0;
-
-extern int stop_stack_dummy;
-
-/* push a dummy frame into stack, save all register. Currently we are saving
-   only gpr's and fpr's, which is not good enough! FIXMEmgo */
-   
-void
-push_dummy_frame ()
-{
-  /* stack pointer.  */
-  CORE_ADDR sp;
-  /* Same thing, target byte order.  */
-  char sp_targ[4];
-
-  /* link register.  */
-  CORE_ADDR pc;
-  /* Same thing, target byte order.  */
-  char pc_targ[4];
-  
-  /* Needed to figure out where to save the dummy link area.
-     FIXME: There should be an easier way to do this, no?  tiemann 9/9/95.  */
-  struct rs6000_framedata fdata;
-
-  int ii;
-
-  target_fetch_registers (-1);
-
-  if (dummy_frame_count >= dummy_frame_size) {
-    dummy_frame_size += DUMMY_FRAME_ADDR_SIZE;
-    if (dummy_frame_addr)
-      dummy_frame_addr = (CORE_ADDR*) xrealloc 
-        (dummy_frame_addr, sizeof(CORE_ADDR) * (dummy_frame_size));
-    else
-      dummy_frame_addr = (CORE_ADDR*) 
-	xmalloc (sizeof(CORE_ADDR) * (dummy_frame_size));
-  }
-  
-  sp = read_register(SP_REGNUM);
-  pc = read_register(PC_REGNUM);
-  store_address (pc_targ, 4, pc);
-
-  skip_prologue (get_pc_function_start (pc), &fdata);
-
-  dummy_frame_addr [dummy_frame_count++] = sp;
-
-  /* Be careful! If the stack pointer is not decremented first, then kernel 
-     thinks he is free to use the space underneath it. And kernel actually 
-     uses that area for IPC purposes when executing ptrace(2) calls. So 
-     before writing register values into the new frame, decrement and update
-     %sp first in order to secure your frame. */
-
-  /* FIXME: We don't check if the stack really has this much space.
-     This is a problem on the ppc simulator (which only grants one page
-     (4096 bytes) by default.  */
-
-  write_register (SP_REGNUM, sp-DUMMY_FRAME_SIZE);
-
-  /* gdb relies on the state of current_frame. We'd better update it,
-     otherwise things like do_registers_info() wouldn't work properly! */
-
-  flush_cached_frames ();
-
-  /* save program counter in link register's space. */
-  write_memory (sp + (fdata.lr_offset ? fdata.lr_offset : DEFAULT_LR_SAVE),
-	        pc_targ, 4);
-
-  /* save all floating point and general purpose registers here. */
-
-  /* fpr's, f0..f31 */
-  for (ii = 0; ii < 32; ++ii)
-    write_memory (sp-8-(ii*8), &registers[REGISTER_BYTE (31-ii+FP0_REGNUM)], 8);
-
-  /* gpr's r0..r31 */
-  for (ii=1; ii <=32; ++ii)
-    write_memory (sp-256-(ii*4), &registers[REGISTER_BYTE (32-ii)], 4);
-
-  /* so far, 32*2 + 32 words = 384 bytes have been written. 
-     7 extra registers in our register set: pc, ps, cnd, lr, cnt, xer, mq */
-
-  for (ii=1; ii <= (LAST_UISA_SP_REGNUM-FIRST_UISA_SP_REGNUM+1); ++ii) {
-    write_memory (sp-384-(ii*4), 
-		  &registers[REGISTER_BYTE (FPLAST_REGNUM + ii)], 4);
-  }
-
-  /* Save sp or so called back chain right here. */
-  store_address (sp_targ, 4, sp);
-  write_memory (sp-DUMMY_FRAME_SIZE, sp_targ, 4);
-  sp -= DUMMY_FRAME_SIZE;
-
-  /* And finally, this is the back chain. */
-  write_memory (sp+8, pc_targ, 4);
-}
-
-
-/* Pop a dummy frame.
-
-   In rs6000 when we push a dummy frame, we save all of the registers. This
-   is usually done before user calls a function explicitly.
-
-   After a dummy frame is pushed, some instructions are copied into stack,
-   and stack pointer is decremented even more.  Since we don't have a frame
-   pointer to get back to the parent frame of the dummy, we start having
-   trouble poping it.  Therefore, we keep a dummy frame stack, keeping
-   addresses of dummy frames as such.  When poping happens and when we
-   detect that was a dummy frame, we pop it back to its parent by using
-   dummy frame stack (`dummy_frame_addr' array). 
-
-FIXME:  This whole concept is broken.  You should be able to detect
-a dummy stack frame *on the user's stack itself*.  When you do,
-then you know the format of that stack frame -- including its
-saved SP register!  There should *not* be a separate stack in the
-GDB process that keeps track of these dummy frames!  -- gnu@cygnus.com Aug92
- */
-   
-static void
-pop_dummy_frame ()
-{
-  CORE_ADDR sp, pc;
-  int ii;
-  sp = dummy_frame_addr [--dummy_frame_count];
-
-  /* restore all fpr's. */
-  for (ii = 1; ii <= 32; ++ii)
-    read_memory (sp-(ii*8), &registers[REGISTER_BYTE (32-ii+FP0_REGNUM)], 8);
-
-  /* restore all gpr's */
-  for (ii=1; ii <= 32; ++ii) {
-    read_memory (sp-256-(ii*4), &registers[REGISTER_BYTE (32-ii)], 4);
-  }
-
-  /* restore the rest of the registers. */
-  for (ii=1; ii <=(LAST_UISA_SP_REGNUM-FIRST_UISA_SP_REGNUM+1); ++ii)
-    read_memory (sp-384-(ii*4),
-    		&registers[REGISTER_BYTE (FPLAST_REGNUM + ii)], 4);
-
-  read_memory (sp-(DUMMY_FRAME_SIZE-8), 
-	       &registers [REGISTER_BYTE(PC_REGNUM)], 4);
-
-  /* when a dummy frame was being pushed, we had to decrement %sp first, in 
-     order to secure astack space. Thus, saved %sp (or %r1) value, is not the
-     one we should restore. Change it with the one we need. */
-
-  memcpy (&registers [REGISTER_BYTE(FP_REGNUM)], (char *) &sp, sizeof (int));
-
-  /* Now we can restore all registers. */
-
-  target_store_registers (-1);
-  pc = read_pc ();
-  flush_cached_frames ();
-}
-
-
-/* pop the innermost frame, go back to the caller. */
-
-void
-pop_frame ()
-{
-  CORE_ADDR pc, lr, sp, prev_sp;		/* %pc, %lr, %sp */
-  struct rs6000_framedata fdata;
-  struct frame_info *frame = get_current_frame ();
-  int addr, ii;
-
-  pc = read_pc ();
-  sp = FRAME_FP (frame);
-
-  if (stop_stack_dummy)
-    {
-#ifdef USE_GENERIC_DUMMY_FRAMES
-      generic_pop_dummy_frame ();
-      flush_cached_frames ();
-      return;
-#else
-      if (dummy_frame_count) 
-	pop_dummy_frame ();
-      return;
-#endif
-    }
-
-  /* Make sure that all registers are valid.  */
-  read_register_bytes (0, NULL, REGISTER_BYTES);
-
-  /* figure out previous %pc value. If the function is frameless, it is 
-     still in the link register, otherwise walk the frames and retrieve the
-     saved %pc value in the previous frame. */
-
-  addr = get_pc_function_start (frame->pc);
-  (void) skip_prologue (addr, &fdata);
-
-  if (fdata.frameless)
-    prev_sp = sp;
-  else
-    prev_sp = read_memory_integer (sp, 4);
-  if (fdata.lr_offset == 0)
-    lr = read_register (LR_REGNUM);
-  else
-    lr = read_memory_integer (prev_sp + fdata.lr_offset, 4);
-
-  /* reset %pc value. */
-  write_register (PC_REGNUM, lr);
-
-  /* reset register values if any was saved earlier. */
-
-  if (fdata.saved_gpr != -1)
-    {
-      addr = prev_sp + fdata.gpr_offset;
-      for (ii = fdata.saved_gpr; ii <= 31; ++ii) {
-	read_memory (addr, &registers [REGISTER_BYTE (ii)], 4);
-	addr += 4;
-      }
-    }
-
-  if (fdata.saved_fpr != -1)
-    {
-      addr = prev_sp + fdata.fpr_offset;
-      for (ii = fdata.saved_fpr; ii <= 31; ++ii) {
-	read_memory (addr, &registers [REGISTER_BYTE (ii+FP0_REGNUM)], 8);
-	addr += 8;
-      }
-    }
-
-  write_register (SP_REGNUM, prev_sp);
-  target_store_registers (-1);
-  flush_cached_frames ();
-}
-
-/* fixup the call sequence of a dummy function, with the real function address.
-   its argumets will be passed by gdb. */
-
-void
-rs6000_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
-     char *dummyname;
-     CORE_ADDR pc;
-     CORE_ADDR fun;
-     int nargs;
-     value_ptr *args;
-     struct type *type;
-     int gcc_p;
-{
-#define	TOC_ADDR_OFFSET		20
-#define	TARGET_ADDR_OFFSET	28
-
-  int ii;
-  CORE_ADDR target_addr;
-
-  if (find_toc_address_hook != NULL)
-    {
-      CORE_ADDR tocvalue;
-
-      tocvalue = (*find_toc_address_hook) (fun);
-      ii  = *(int*)((char*)dummyname + TOC_ADDR_OFFSET);
-      ii = (ii & 0xffff0000) | (tocvalue >> 16);
-      *(int*)((char*)dummyname + TOC_ADDR_OFFSET) = ii;
-
-      ii  = *(int*)((char*)dummyname + TOC_ADDR_OFFSET+4);
-      ii = (ii & 0xffff0000) | (tocvalue & 0x0000ffff);
-      *(int*)((char*)dummyname + TOC_ADDR_OFFSET+4) = ii;
-    }
-
-  target_addr = fun;
-  ii  = *(int*)((char*)dummyname + TARGET_ADDR_OFFSET);
-  ii = (ii & 0xffff0000) | (target_addr >> 16);
-  *(int*)((char*)dummyname + TARGET_ADDR_OFFSET) = ii;
-
-  ii  = *(int*)((char*)dummyname + TARGET_ADDR_OFFSET+4);
-  ii = (ii & 0xffff0000) | (target_addr & 0x0000ffff);
-  *(int*)((char*)dummyname + TARGET_ADDR_OFFSET+4) = ii;
-}
-
-/* Pass the arguments in either registers, or in the stack. In RS6000,
-   the first eight words of the argument list (that might be less than
-   eight parameters if some parameters occupy more than one word) are
-   passed in r3..r11 registers.  float and double parameters are
-   passed in fpr's, in addition to that. Rest of the parameters if any
-   are passed in user stack. There might be cases in which half of the
-   parameter is copied into registers, the other half is pushed into
-   stack.
-
-   If the function is returning a structure, then the return address is passed
-   in r3, then the first 7 words of the parameters can be passed in registers,
-   starting from r4. */
-
-CORE_ADDR
-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 ii;
-  int len = 0;
-  int argno;					/* current argument number */
-  int argbytes;					/* current argument byte */
-  char tmp_buffer [50];
-  int f_argno = 0;				/* current floating point argno */
-
-  value_ptr arg = 0;
-  struct type *type;
-
-  CORE_ADDR saved_sp;
-
-#ifndef USE_GENERIC_DUMMY_FRAMES
-  if ( dummy_frame_count <= 0)
-    printf_unfiltered ("FATAL ERROR -push_arguments()! frame not found!!\n");
-#endif	/* GENERIC_DUMMY_FRAMES */
-
-  /* The first eight words of ther arguments are passed in registers. Copy
-     them appropriately.
-
-     If the function is returning a `struct', then the first word (which 
-     will be passed in r3) is used for struct return address. In that
-     case we should advance one word and start from r4 register to copy 
-     parameters. */
-
-  ii =  struct_return ? 1 : 0;
-
-/* 
-effectively indirect call... gcc does...
-
-return_val example( float, int);
-
-eabi: 
-    float in fp0, int in r3
-    offset of stack on overflow 8/16
-    for varargs, must go by type.
-power open:
-    float in r3&r4, int in r5
-    offset of stack on overflow different 
-both: 
-    return in r3 or f0.  If no float, must study how gcc emulates floats;
-    pay attention to arg promotion.  
-    User may have to cast\args to handle promotion correctly 
-    since gdb won't know if prototype supplied or not.
-*/
-
-  for (argno=0, argbytes=0; argno < nargs && ii<8; ++ii) {
-
-    arg = args[argno];
-    type = check_typedef (VALUE_TYPE (arg));
-    len = TYPE_LENGTH (type);
-
-    if (TYPE_CODE (type) == TYPE_CODE_FLT) {
-
-      /* floating point arguments are passed in fpr's, as well as gpr's.
-         There are 13 fpr's reserved for passing parameters. At this point
-         there is no way we would run out of them. */
-
-      if (len > 8)
-        printf_unfiltered (
-"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
-
-      memcpy (&registers[REGISTER_BYTE(FP0_REGNUM + 1 + f_argno)], 
-	      VALUE_CONTENTS (arg), 
-	      len);
-      ++f_argno;
-    }
-
-    if (len > 4) {
-
-      /* Argument takes more than one register. */
-      while (argbytes < len) {
-	memset (&registers[REGISTER_BYTE(ii+3)], 0, sizeof(int));
-	memcpy (&registers[REGISTER_BYTE(ii+3)], 
-		((char*)VALUE_CONTENTS (arg))+argbytes, 
-		(len - argbytes) > 4 ? 4 : len - argbytes);
-	++ii, argbytes += 4;
-
-	if (ii >= 8)
-	  goto ran_out_of_registers_for_arguments;
-      }
-      argbytes = 0;
-      --ii;
-    }
-    else {        /* Argument can fit in one register. No problem. */
-      memset (&registers[REGISTER_BYTE(ii+3)], 0, sizeof(int));
-      memcpy (&registers[REGISTER_BYTE(ii+3)], VALUE_CONTENTS (arg), len);
-    }
-    ++argno;
-  }
-
-ran_out_of_registers_for_arguments:
-
-#ifdef USE_GENERIC_DUMMY_FRAMES
-  saved_sp = read_sp ();
-#else
-  /* location for 8 parameters are always reserved. */
-  sp -= 4 * 8;
-
-  /* another six words for back chain, TOC register, link register, etc. */
-  sp -= 24;
-#endif	/* GENERIC_DUMMY_FRAMES */
-  /* if there are more arguments, allocate space for them in 
-     the stack, then push them starting from the ninth one. */
-
-  if ((argno < nargs) || argbytes) {
-    int space = 0, jj;
-
-    if (argbytes) {
-      space += ((len - argbytes + 3) & -4);
-      jj = argno + 1;
-    }
-    else
-      jj = argno;
-
-    for (; jj < nargs; ++jj) {
-      value_ptr val = args[jj];
-      space += ((TYPE_LENGTH (VALUE_TYPE (val))) + 3) & -4;
-    }
-
-    /* add location required for the rest of the parameters */
-    space = (space + 7) & -8;
-    sp -= space;
-
-    /* This is another instance we need to be concerned about securing our
-	stack space. If we write anything underneath %sp (r1), we might conflict
-	with the kernel who thinks he is free to use this area. So, update %sp
-	first before doing anything else. */
-
-    write_register (SP_REGNUM, sp);
-
-    /* if the last argument copied into the registers didn't fit there 
-       completely, push the rest of it into stack. */
-
-    if (argbytes) {
-      write_memory (sp+24+(ii*4), 
-		    ((char*)VALUE_CONTENTS (arg))+argbytes, 
-		    len - argbytes);
-      ++argno;
-      ii += ((len - argbytes + 3) & -4) / 4;
-    }
-
-    /* push the rest of the arguments into stack. */
-    for (; argno < nargs; ++argno) {
-
-      arg = args[argno];
-      type = check_typedef (VALUE_TYPE (arg));
-      len = TYPE_LENGTH (type);
-
-
-      /* float types should be passed in fpr's, as well as in the stack. */
-      if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13) {
-
-        if (len > 8)
-          printf_unfiltered (
-"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
-
-        memcpy (&registers[REGISTER_BYTE(FP0_REGNUM + 1 + f_argno)], 
-		VALUE_CONTENTS (arg), 
-		len);
-        ++f_argno;
-      }
-
-      write_memory (sp+24+(ii*4), (char *) VALUE_CONTENTS (arg), len);
-      ii += ((len + 3) & -4) / 4;
-    }
-  }
-  else
-    /* Secure stack areas first, before doing anything else. */
-    write_register (SP_REGNUM, sp);
-
-#ifndef USE_GENERIC_DUMMY_FRAMES
-/* we want to copy 24 bytes of target's frame to dummy's frame,
-   then set back chain to point to new frame. */
-
-  saved_sp = dummy_frame_addr [dummy_frame_count - 1];
-  read_memory (saved_sp, tmp_buffer, 24);
-  write_memory (sp, tmp_buffer, 24);
-#endif	/* GENERIC_DUMMY_FRAMES */
-
-  /* set back chain properly */
-  store_address (tmp_buffer, 4, saved_sp);
-  write_memory (sp, tmp_buffer, 4);
-
-  target_store_registers (-1);
-  return sp;
-}
-#ifdef ELF_OBJECT_FORMAT
-
-/* Function: ppc_push_return_address (pc, sp)
-   Set up the return address for the inferior function call. */
-
-CORE_ADDR                                      
-ppc_push_return_address (pc, sp)
-     CORE_ADDR pc;
-     CORE_ADDR sp;
-{
-  write_register (LR_REGNUM, CALL_DUMMY_ADDRESS ());
-  return sp;
-}
-
-#endif
-
-/* a given return value in `regbuf' with a type `valtype', extract and copy its
-   value into `valbuf' */
-
-void
-extract_return_value (valtype, regbuf, valbuf)
-     struct type *valtype;
-     char regbuf[REGISTER_BYTES];
-     char *valbuf;
-{
-  int offset = 0;
-
-  if (TYPE_CODE (valtype) == TYPE_CODE_FLT) {
-
-    double dd; float ff;
-    /* floats and doubles are returned in fpr1. fpr's have a size of 8 bytes.
-       We need to truncate the return value into float size (4 byte) if
-       necessary. */
-
-    if (TYPE_LENGTH (valtype) > 4) 		/* this is a double */
-      memcpy (valbuf, 
-	      &regbuf[REGISTER_BYTE (FP0_REGNUM + 1)],
-	      TYPE_LENGTH (valtype));
-    else {		/* float */
-      memcpy (&dd, &regbuf[REGISTER_BYTE (FP0_REGNUM + 1)], 8);
-      ff = (float)dd;
-      memcpy (valbuf, &ff, sizeof(float));
-    }
-  }
-  else {
-    /* return value is copied starting from r3. */
-    if (TARGET_BYTE_ORDER == BIG_ENDIAN
-	&& TYPE_LENGTH (valtype) < REGISTER_RAW_SIZE (3))
-      offset = REGISTER_RAW_SIZE (3) - TYPE_LENGTH (valtype);
-
-    memcpy (valbuf, 
-	    regbuf + REGISTER_BYTE (3) + offset,
-	    TYPE_LENGTH (valtype));
-  }
-}
-
-
-/* keep structure return address in this variable.
-   FIXME:  This is a horrid kludge which should not be allowed to continue
-   living.  This only allows a single nested call to a structure-returning
-   function.  Come on, guys!  -- gnu@cygnus.com, Aug 92  */
-
-CORE_ADDR rs6000_struct_return_address;
-
-
-/* Indirect function calls use a piece of trampoline code to do context
-   switching, i.e. to set the new TOC table. Skip such code if we are on
-   its first instruction (as when we have single-stepped to here). 
-   Also skip shared library trampoline code (which is different from
-   indirect function call trampolines).
-   Result is desired PC to step until, or NULL if we are not in
-   trampoline code.  */
-
-CORE_ADDR
-skip_trampoline_code (pc)
-     CORE_ADDR pc;
-{
-  register unsigned int ii, op;
-  CORE_ADDR solib_target_pc;
-
-  static unsigned trampoline_code[] = {
-	0x800b0000,			/*     l   r0,0x0(r11)	*/
-	0x90410014,			/*    st   r2,0x14(r1)	*/
-	0x7c0903a6,			/* mtctr   r0		*/
-	0x804b0004,			/*     l   r2,0x4(r11)	*/
-	0x816b0008,			/*     l  r11,0x8(r11)	*/
-	0x4e800420,			/*  bctr		*/
-	0x4e800020,			/*    br		*/
-	0
-  };
-
-  /* If pc is in a shared library trampoline, return its target.  */
-  solib_target_pc = find_solib_trampoline_target (pc);
-  if (solib_target_pc)
-    return solib_target_pc;
-
-  for (ii=0; trampoline_code[ii]; ++ii) {
-    op  = read_memory_integer (pc + (ii*4), 4);
-    if (op != trampoline_code [ii])
-      return 0;
-  }
-  ii = read_register (11);		/* r11 holds destination addr	*/
-  pc = read_memory_integer (ii, 4);	/* (r11) value			*/
-  return pc;
-}
-
-/* Determines whether the function FI has a frame on the stack or not.  */
-
-int
-frameless_function_invocation (fi)
-     struct frame_info *fi;
-{
-  CORE_ADDR func_start;
-  struct rs6000_framedata fdata;
-
-  /* Don't even think about framelessness except on the innermost frame
-     or if the function was interrupted by a signal.  */
-  if (fi->next != NULL && !fi->next->signal_handler_caller)
-    return 0;
-  
-  func_start = get_pc_function_start (fi->pc);
-
-  /* If we failed to find the start of the function, it is a mistake
-     to inspect the instructions. */
-
-  if (!func_start)
-    {
-      /* A frame with a zero PC is usually created by dereferencing a NULL
-	 function pointer, normally causing an immediate core dump of the
-	 inferior. Mark function as frameless, as the inferior has no chance
-	 of setting up a stack frame.  */
-      if (fi->pc == 0)
-	return 1;
-      else
-	return 0;
-    }
-
-  (void) skip_prologue (func_start, &fdata);
-  return fdata.frameless;
-}
-
-/* Return the PC saved in a frame */
-
-unsigned long
-frame_saved_pc (fi)
-     struct frame_info *fi;
-{
-  CORE_ADDR func_start;
-  struct rs6000_framedata fdata;
-
-  if (fi->signal_handler_caller)
-    return read_memory_integer (fi->frame + SIG_FRAME_PC_OFFSET, 4);
-
-#ifdef USE_GENERIC_DUMMY_FRAMES
-  if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
-    return generic_read_register_dummy(fi->pc, fi->frame, PC_REGNUM);
-#endif	/* GENERIC_DUMMY_FRAMES */
-
-  func_start = get_pc_function_start (fi->pc);
-
-  /* If we failed to find the start of the function, it is a mistake
-     to inspect the instructions. */
-  if (!func_start)
-    return 0;
-
-  (void) skip_prologue (func_start, &fdata);
-
-  if (fdata.lr_offset == 0 && fi->next != NULL)
-    {
-      if (fi->next->signal_handler_caller)
-	return read_memory_integer (fi->next->frame + SIG_FRAME_LR_OFFSET, 4);
-      else
-	return read_memory_integer (rs6000_frame_chain (fi) + DEFAULT_LR_SAVE,
-				    4);
-    }
-
-  if (fdata.lr_offset == 0)
-    return read_register (LR_REGNUM);
-
-  return read_memory_integer (rs6000_frame_chain (fi) + fdata.lr_offset, 4);
-}
-
-/* If saved registers of frame FI are not known yet, read and cache them.
-   &FDATAP contains rs6000_framedata; TDATAP can be NULL,
-   in which case the framedata are read.  */
-
-static void
-frame_get_saved_regs (fi, fdatap)
-     struct frame_info *fi;
-     struct rs6000_framedata *fdatap;
-{
-  int ii;
-  CORE_ADDR frame_addr; 
-  struct rs6000_framedata work_fdata;
-
-  if (fi->saved_regs)
-    return;
-  
-  if (fdatap == NULL)
-    {
-      fdatap = &work_fdata;
-      (void) skip_prologue (get_pc_function_start (fi->pc), fdatap);
-    }
-
-  frame_saved_regs_zalloc (fi);
-
-  /* If there were any saved registers, figure out parent's stack
-     pointer. */
-  /* The following is true only if the frame doesn't have a call to
-     alloca(), FIXME. */
-
-  if (fdatap->saved_fpr == 0 && fdatap->saved_gpr == 0
-      && fdatap->lr_offset == 0 && fdatap->cr_offset == 0)
-    frame_addr = 0;
-  else if (fi->prev && fi->prev->frame)
-    frame_addr = fi->prev->frame;
-  else
-    frame_addr = read_memory_integer (fi->frame, 4);
-  
-  /* if != -1, fdatap->saved_fpr is the smallest number of saved_fpr.
-     All fpr's from saved_fpr to fp31 are saved.  */
-
-  if (fdatap->saved_fpr >= 0)
-    {
-      int i;
-      int fpr_offset = frame_addr + fdatap->fpr_offset;
-      for (i = fdatap->saved_fpr; i < 32; i++)
-	{
-	  fi->saved_regs [FP0_REGNUM + i] = fpr_offset;
-	  fpr_offset += 8;
-	}
-    }
-
-  /* if != -1, fdatap->saved_gpr is the smallest number of saved_gpr.
-     All gpr's from saved_gpr to gpr31 are saved.  */
-
-  if (fdatap->saved_gpr >= 0)
-    {
-      int i;
-      int gpr_offset = frame_addr + fdatap->gpr_offset;
-      for (i = fdatap->saved_gpr; i < 32; i++)
-	{
-	  fi->saved_regs [i] = gpr_offset;
-	  gpr_offset += 4;
-	}
-    }
-
-  /* If != 0, fdatap->cr_offset is the offset from the frame that holds
-     the CR.  */
-  if (fdatap->cr_offset != 0)
-    fi->saved_regs [CR_REGNUM] = frame_addr + fdatap->cr_offset;
-
-  /* If != 0, fdatap->lr_offset is the offset from the frame that holds
-     the LR.  */
-  if (fdatap->lr_offset != 0)
-    fi->saved_regs [LR_REGNUM] = frame_addr + fdatap->lr_offset;
-}
-
-/* Return the address of a frame. This is the inital %sp value when the frame
-   was first allocated. For functions calling alloca(), it might be saved in
-   an alloca register. */
-
-static CORE_ADDR
-frame_initial_stack_address (fi)
-     struct frame_info *fi;
-{
-  CORE_ADDR tmpaddr;
-  struct rs6000_framedata fdata;
-  struct frame_info *callee_fi;
-
-  /* if the initial stack pointer (frame address) of this frame is known,
-     just return it. */
-
-  if (fi->extra_info->initial_sp)
-    return fi->extra_info->initial_sp;
-
-  /* find out if this function is using an alloca register.. */
-
-  (void) skip_prologue (get_pc_function_start (fi->pc), &fdata);
-
-  /* if saved registers of this frame are not known yet, read and cache them. */
-
-  if (!fi->saved_regs)
-    frame_get_saved_regs (fi, &fdata);
-
-  /* If no alloca register used, then fi->frame is the value of the %sp for
-     this frame, and it is good enough. */
-
-  if (fdata.alloca_reg < 0)
-    {
-      fi->extra_info->initial_sp = fi->frame;
-      return fi->extra_info->initial_sp;
-    }
-
-  /* This function has an alloca register. If this is the top-most frame
-     (with the lowest address), the value in alloca register is good. */
-
-  if (!fi->next)
-    return fi->extra_info->initial_sp = read_register (fdata.alloca_reg);     
-
-  /* Otherwise, this is a caller frame. Callee has usually already saved
-     registers, but there are exceptions (such as when the callee
-     has no parameters). Find the address in which caller's alloca
-     register is saved. */
-
-  for (callee_fi = fi->next; callee_fi; callee_fi = callee_fi->next) {
-
-    if (!callee_fi->saved_regs)
-      frame_get_saved_regs (callee_fi, NULL);
-
-    /* this is the address in which alloca register is saved. */
-
-    tmpaddr = callee_fi->saved_regs [fdata.alloca_reg];
-    if (tmpaddr) {
-      fi->extra_info->initial_sp = read_memory_integer (tmpaddr, 4); 
-      return fi->extra_info->initial_sp;
-    }
-
-    /* Go look into deeper levels of the frame chain to see if any one of
-       the callees has saved alloca register. */
-  }
-
-  /* If alloca register was not saved, by the callee (or any of its callees)
-     then the value in the register is still good. */
-
-  fi->extra_info->initial_sp = read_register (fdata.alloca_reg);
-  return fi->extra_info->initial_sp;
-}
-
-CORE_ADDR
-rs6000_frame_chain (thisframe)
-     struct frame_info *thisframe;
-{
-  CORE_ADDR fp;
-
-#ifdef USE_GENERIC_DUMMY_FRAMES
-  if (PC_IN_CALL_DUMMY (thisframe->pc, thisframe->frame, thisframe->frame))
-    return thisframe->frame;	/* dummy frame same as caller's frame */
-#endif	/* GENERIC_DUMMY_FRAMES */
-
-  if (inside_entry_file (thisframe->pc) || 
-      thisframe->pc == entry_point_address ())
-    return 0;
-
-  if (thisframe->signal_handler_caller)
-    fp = read_memory_integer (thisframe->frame + SIG_FRAME_FP_OFFSET, 4);
-  else if (thisframe->next != NULL
-	   && thisframe->next->signal_handler_caller
-	   && frameless_function_invocation (thisframe))
-    /* A frameless function interrupted by a signal did not change the
-       frame pointer.  */
-    fp = FRAME_FP (thisframe);
-  else
-    fp = read_memory_integer ((thisframe)->frame, 4);
-
-#ifdef USE_GENERIC_DUMMY_FRAMES
-  {
-    CORE_ADDR fpp, lr;
-
-    lr = read_register (LR_REGNUM);
-    if (lr == entry_point_address ())
-      if (fp != 0 && (fpp = read_memory_integer (fp, 4)) != 0)
-	if (PC_IN_CALL_DUMMY (lr, fpp, fpp))
-	  return fpp;
-  }
-#endif	/* GENERIC_DUMMY_FRAMES */
-  return fp;
-}
-
-/* Return nonzero if ADDR (a function pointer) is in the data space and
-   is therefore a special function pointer.  */
-
-int
-is_magic_function_pointer (addr)
-     CORE_ADDR addr;
-{
-  struct obj_section *s;
-
-  s = find_pc_section (addr);
-  if (s && s->the_bfd_section->flags & SEC_CODE)
-    return 0;
-  else
-    return 1;
-}
-
-#ifdef GDB_TARGET_POWERPC
-int
-gdb_print_insn_powerpc (memaddr, info)
-     bfd_vma memaddr;
-     disassemble_info *info;
-{
-  if (TARGET_BYTE_ORDER == BIG_ENDIAN)
-    return print_insn_big_powerpc (memaddr, info);
-  else
-    return print_insn_little_powerpc (memaddr, info);
-}
-#endif
-
-/* Function: get_saved_register
-   Just call the generic_get_saved_register function.  */
-
-#ifdef USE_GENERIC_DUMMY_FRAMES
-void
-get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
-     char *raw_buffer;
-     int *optimized;
-     CORE_ADDR *addrp;
-     struct frame_info *frame;
-     int regnum;
-     enum lval_type *lval;
-{
-  generic_get_saved_register (raw_buffer, optimized, addrp, 
-			      frame, regnum, lval);
-}
-#endif
-
-
-
-/* Handling the various PowerPC/RS6000 variants.  */
-
-
-/* The arrays here called register_names_MUMBLE hold names that 
-   the rs6000_register_name function returns.
-
-   For each family of PPC variants, I've tried to isolate out the
-   common registers and put them up front, so that as long as you get
-   the general family right, GDB will correctly identify the registers
-   common to that family.  The common register sets are:
-
-   For the 60x family: hid0 hid1 iabr dabr pir
-
-   For the 505 and 860 family: eie eid nri
-
-   For the 403 and 403GC: icdbdr esr dear evpr cdbcr tsr tcr pit tbhi
-	tblo srr2 srr3 dbsr dbcr iac1 iac2 dac1 dac2 dccr iccr pbl1
-	pbu1 pbl2 pbu2
-
-   Most of these register groups aren't anything formal.  I arrived at
-   them by looking at the registers that occurred in more than one
-   processor.  */
-
-/* UISA register names common across all architectures, including POWER.  */
-
-#define COMMON_UISA_REG_NAMES \
-  /*  0 */ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",  \
-  /*  8 */ "r8", "r9", "r10","r11","r12","r13","r14","r15", \
-  /* 16 */ "r16","r17","r18","r19","r20","r21","r22","r23", \
-  /* 24 */ "r24","r25","r26","r27","r28","r29","r30","r31", \
-  /* 32 */ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",  \
-  /* 40 */ "f8", "f9", "f10","f11","f12","f13","f14","f15", \
-  /* 48 */ "f16","f17","f18","f19","f20","f21","f22","f23", \
-  /* 56 */ "f24","f25","f26","f27","f28","f29","f30","f31", \
-  /* 64 */ "pc", "ps"
-
-/* UISA-level SPR names for PowerPC.  */
-#define PPC_UISA_SPR_NAMES \
-  /* 66 */ "cr",  "lr", "ctr", "xer", ""
-
-/* Segment register names, for PowerPC.  */
-#define PPC_SEGMENT_REG_NAMES \
-  /* 71 */ "sr0", "sr1", "sr2",  "sr3",  "sr4",  "sr5",  "sr6",  "sr7", \
-  /* 79 */ "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15"
-
-/* OEA SPR names for 32-bit PowerPC implementations.
-   The blank space is for "asr", which is only present on 64-bit
-   implementations.  */
-#define PPC_32_OEA_SPR_NAMES \
-  /*  87 */ "pvr", \
-  /*  88 */ "ibat0u", "ibat0l", "ibat1u", "ibat1l", \
-  /*  92 */ "ibat2u", "ibat2l", "ibat3u", "ibat3l", \
-  /*  96 */ "dbat0u", "dbat0l", "dbat1u", "dbat1l", \
-  /* 100 */ "dbat2u", "dbat2l", "dbat3u", "dbat3l", \
-  /* 104 */ "sdr1", "", "dar", "dsisr", "sprg0", "sprg1", "sprg2", "sprg3",\
-  /* 112 */ "srr0", "srr1", "tbl", "tbu", "dec", "dabr", "ear"
-
-/* For the RS6000, we only cover user-level SPR's.  */
-char *register_names_rs6000[] =
-{
-  COMMON_UISA_REG_NAMES,
-  /* 66 */ "cnd", "lr", "cnt", "xer", "mq"
-};
-
-/* a UISA-only view of the PowerPC.  */
-char *register_names_uisa[] =
-{
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES
-};
-
-char *register_names_403[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "icdbdr", "esr", "dear", "evpr", "cdbcr", "tsr", "tcr", "pit", 
-  /* 127 */ "tbhi", "tblo", "srr2", "srr3", "dbsr", "dbcr", "iac1", "iac2", 
-  /* 135 */ "dac1", "dac2", "dccr", "iccr", "pbl1", "pbu1", "pbl2", "pbu2"
-};
-
-char *register_names_403GC[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "icdbdr", "esr", "dear", "evpr", "cdbcr", "tsr", "tcr", "pit", 
-  /* 127 */ "tbhi", "tblo", "srr2", "srr3", "dbsr", "dbcr", "iac1", "iac2", 
-  /* 135 */ "dac1", "dac2", "dccr", "iccr", "pbl1", "pbu1", "pbl2", "pbu2", 
-  /* 143 */ "zpr", "pid", "sgr", "dcwr", "tbhu", "tblu"
-};
-
-char *register_names_505[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "eie", "eid", "nri"
-};
-
-char *register_names_860[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "eie", "eid", "nri", "cmpa", "cmpb", "cmpc", "cmpd", "icr", 
-  /* 127 */ "der", "counta", "countb", "cmpe", "cmpf", "cmpg", "cmph", 
-  /* 134 */ "lctrl1", "lctrl2", "ictrl", "bar", "ic_cst", "ic_adr", "ic_dat", 
-  /* 141 */ "dc_cst", "dc_adr", "dc_dat", "dpdr", "dpir", "immr", "mi_ctr", 
-  /* 148 */ "mi_ap", "mi_epn", "mi_twc", "mi_rpn", "md_ctr", "m_casid", 
-  /* 154 */ "md_ap", "md_epn", "md_twb", "md_twc", "md_rpn", "m_tw", 
-  /* 160 */ "mi_dbcam", "mi_dbram0", "mi_dbram1", "md_dbcam", "md_dbram0", 
-  /* 165 */ "md_dbram1"
-};
-
-/* Note that the 601 has different register numbers for reading and
-   writing RTCU and RTCL.  However, how one reads and writes a
-   register is the stub's problem.  */
-char *register_names_601[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "hid0", "hid1", "iabr", "dabr", "pir", "mq", "rtcu", 
-  /* 126 */ "rtcl"
-};
-
-char *register_names_602[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "hid0", "hid1", "iabr", "", "", "tcr", "ibr", "esassr", "sebr", 
-  /* 128 */ "ser", "sp", "lt"
-};
-
-char *register_names_603[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "hid0", "hid1", "iabr", "", "", "dmiss", "dcmp", "hash1", 
-  /* 127 */ "hash2", "imiss", "icmp", "rpa"
-};
-
-char *register_names_604[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "hid0", "hid1", "iabr", "dabr", "pir", "mmcr0", "pmc1", "pmc2", 
-  /* 127 */ "sia", "sda"
-};
-
-char *register_names_750[] =
-{ 
-  COMMON_UISA_REG_NAMES,
-  PPC_UISA_SPR_NAMES,
-  PPC_SEGMENT_REG_NAMES,
-  PPC_32_OEA_SPR_NAMES,
-  /* 119 */ "hid0", "hid1", "iabr", "dabr", "", "ummcr0", "upmc1", "upmc2", 
-  /* 127 */ "usia", "ummcr1", "upmc3", "upmc4", "mmcr0", "pmc1", "pmc2", 
-  /* 134 */ "sia", "mmcr1", "pmc3", "pmc4", "l2cr", "ictc", "thrm1", "thrm2", 
-  /* 142 */ "thrm3"
-};
-
-
-/* Information about a particular processor variant.  */
-struct variant
-{
-  /* Name of this variant.  */
-  char *name;
-
-  /* English description of the variant.  */
-  char *description;
-
-  /* Table of register names; registers[R] is the name of the register
-     number R.  */
-  int num_registers;
-  char **registers;
-};
-
-#define num_registers(list) (sizeof (list) / sizeof((list)[0]))
-
-
-/* Information in this table comes from the following web sites:
-   IBM:       http://www.chips.ibm.com:80/products/embedded/
-   Motorola:  http://www.mot.com/SPS/PowerPC/
-
-   I'm sure I've got some of the variant descriptions not quite right.
-   Please report any inaccuracies you find to GDB's maintainer.
-
-   If you add entries to this table, please be sure to allow the new
-   value as an argument to the --with-cpu flag, in configure.in.  */
-
-static struct variant
-variants[] =
-{
-  { "ppc-uisa", "PowerPC UISA - a PPC processor as viewed by user-level code",
-    num_registers (register_names_uisa),   register_names_uisa },
-  { "rs6000", "IBM RS6000 (\"POWER\") architecture, user-level view",
-    num_registers (register_names_rs6000), register_names_rs6000 },
-  { "403", "IBM PowerPC 403",
-    num_registers (register_names_403),   register_names_403 },
-  { "403GC", "IBM PowerPC 403GC",
-    num_registers (register_names_403GC), register_names_403GC },
-  { "505", "Motorola PowerPC 505",
-    num_registers (register_names_505),   register_names_505 },
-  { "860", "Motorola PowerPC 860 or 850",
-    num_registers (register_names_860),   register_names_860 },
-  { "601", "Motorola PowerPC 601",
-    num_registers (register_names_601),   register_names_601 },
-  { "602", "Motorola PowerPC 602",
-    num_registers (register_names_602),   register_names_602 },
-  { "603", "Motorola/IBM PowerPC 603 or 603e",
-    num_registers (register_names_603),   register_names_603 },
-  { "604", "Motorola PowerPC 604 or 604e",
-    num_registers (register_names_604),   register_names_604 },
-  { "750", "Motorola/IBM PowerPC 750 or 750",
-    num_registers (register_names_750),   register_names_750 },
-  { 0, 0, 0, 0 }
-};
-
-
-static struct variant *current_variant;
-
-char *
-rs6000_register_name (int i)
-{
-  if (i < 0 || i >= NUM_REGS)
-    error ("GDB bug: rs6000-tdep.c (rs6000_register_name): strange register number");
-
-  return ((i < current_variant->num_registers)
-	  ? current_variant->registers[i]
-	  : "");
-}
-
-
-static void
-install_variant (struct variant *v)
-{
-  current_variant = v;
-}
-
-
-/* Look up the variant named NAME in the `variants' table.  Return a
-   pointer to the struct variant, or null if we couldn't find it.  */
-static struct variant *
-find_variant_by_name (char *name)
-{
-  int i;
-  
-  for (i = 0; variants[i].name; i++)
-    if (! strcmp (name, variants[i].name))
-      return &variants[i];
-
-  return 0;
-}
-
-
-/* Install the PPC/RS6000 variant named NAME in the `variants' table.
-   Return zero if we installed it successfully, or a non-zero value if
-   we couldn't do it.
-
-   This might be useful to code outside this file, which doesn't want
-   to depend on the exact indices of the entries in the `variants'
-   table.  Just make it non-static if you want that.  */
-static int
-install_variant_by_name (char *name)
-{
-  struct variant *v = find_variant_by_name (name);
-
-  if (v)
-    {
-      install_variant (v);
-      return 0;
-    }
-  else
-    return 1;
-}
-
-
-static void
-list_variants ()
-{
-  int i;
-
-  printf_filtered ("GDB knows about the following PowerPC and RS6000 variants:\n");
-
-  for (i = 0; variants[i].name; i++)
-    printf_filtered ("  %-8s  %s\n",
-		     variants[i].name, variants[i].description);
-}
-
-
-static void
-show_current_variant ()
-{
-  printf_filtered ("PowerPC / RS6000 processor variant is set to `%s'.\n",
-		   current_variant->name);
-}
-
-
-static void
-set_processor (char *arg, int from_tty)
-{
-  int i;
-
-  if (! arg || arg[0] == '\0')
-    {
-      list_variants ();
-      return;
-    }
-
-  if (install_variant_by_name (arg))
-    {
-      error_begin ();
-      fprintf_filtered (gdb_stderr,
-			"`%s' is not a recognized PowerPC / RS6000 variant name.\n\n", arg);
-      list_variants ();
-      return_to_top_level (RETURN_ERROR);
-    }
-
-  show_current_variant ();
-}
-
-static void
-show_processor (char *arg, int from_tty)
-{
-  show_current_variant ();
-}
-
-
-
-/* Initialization code.  */
-
-void
-_initialize_rs6000_tdep ()
-{
-  /* FIXME, this should not be decided via ifdef. */
-#ifdef GDB_TARGET_POWERPC
-  tm_print_insn = gdb_print_insn_powerpc;
-#else
-  tm_print_insn = print_insn_rs6000;
-#endif
-
-  /* I don't think we should use the set/show command arrangement
-     here, because the way that's implemented makes it hard to do the
-     error checking we want in a reasonable way.  So we just add them
-     as two separate commands.  */
-  add_cmd ("processor", class_support, set_processor,
-	   "`set processor NAME' sets the PowerPC/RS6000 variant to NAME.\n\
-If you set this, GDB will know about the special-purpose registers that are\n\
-available on the given variant.\n\
-Type `set processor' alone for a list of recognized variant names.",
-	   &setlist);
-  add_cmd ("processor", class_support, show_processor,
-	   "Show the variant of the PowerPC or RS6000 processor in use.\n\
-Use `set processor' to change this.",
-	   &showlist);
-
-  /* Set the current PPC processor variant.  */
-  {
-    int status = 1;
-
-#ifdef TARGET_CPU_DEFAULT
-    status = install_variant_by_name (TARGET_CPU_DEFAULT);
-#endif
-
-    if (status)
-      {
-#ifdef GDB_TARGET_POWERPC
-	install_variant_by_name ("ppc-uisa");
-#else
-	install_variant_by_name ("rs6000");
-#endif
-      }
-  }
-}