Initial creation of sourceware repository

1 files changed, 0 insertions, 4437 deletions

diff --git a/gdb/hppa-tdep.c b/gdb/hppa-tdep.c
deleted file mode 100644
index f784c21..0000000
--- a/gdb/hppa-tdep.c
+++ /dev/null
@@ -1,4437 +0,0 @@
-/* Target-dependent code for the HP PA architecture, for GDB.
-   Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
-   Free Software Foundation, Inc.
-
-   Contributed by the Center for Software Science at the
-   University of Utah (pa-gdb-bugs@cs.utah.edu).
-
-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 "bfd.h"
-#include "inferior.h"
-#include "value.h"
-
-/* For argument passing to the inferior */
-#include "symtab.h"
-
-#ifdef USG
-#include <sys/types.h>
-#endif
-
-#include <dl.h>
-#include <sys/param.h>
-#include <signal.h>
-
-#include <sys/ptrace.h>
-#include <machine/save_state.h>
-
-#ifdef COFF_ENCAPSULATE
-#include "a.out.encap.h"
-#else
-#endif
-
-/*#include <sys/user.h>		After a.out.h  */
-#include <sys/file.h>
-#include "gdb_stat.h"
-#include "wait.h"
-
-#include "gdbcore.h"
-#include "gdbcmd.h"
-#include "target.h"
-#include "symfile.h"
-#include "objfiles.h"
-
-/* To support asking "What CPU is this?" */
-#include <unistd.h>
-
-/* To support detection of the pseudo-initial frame
-   that threads have. */
-#define THREAD_INITIAL_FRAME_SYMBOL  "__pthread_exit"
-#define THREAD_INITIAL_FRAME_SYM_LEN  sizeof(THREAD_INITIAL_FRAME_SYMBOL)
- 
-static int extract_5_load PARAMS ((unsigned int));
-
-static unsigned extract_5R_store PARAMS ((unsigned int));
-
-static unsigned extract_5r_store PARAMS ((unsigned int));
-
-static void find_dummy_frame_regs PARAMS ((struct frame_info *,
-					   struct frame_saved_regs *));
-
-static int find_proc_framesize PARAMS ((CORE_ADDR));
-
-static int find_return_regnum PARAMS ((CORE_ADDR));
-
-struct unwind_table_entry *find_unwind_entry PARAMS ((CORE_ADDR));
-
-static int extract_17 PARAMS ((unsigned int));
-
-static unsigned deposit_21 PARAMS ((unsigned int, unsigned int));
-
-static int extract_21 PARAMS ((unsigned));
-
-static unsigned deposit_14 PARAMS ((int, unsigned int));
-
-static int extract_14 PARAMS ((unsigned));
-
-static void unwind_command PARAMS ((char *, int));
-
-static int low_sign_extend PARAMS ((unsigned int, unsigned int));
-
-static int sign_extend PARAMS ((unsigned int, unsigned int));
-
-static int restore_pc_queue PARAMS ((struct frame_saved_regs *));
-
-static int hppa_alignof PARAMS ((struct type *));
-
-/* To support multi-threading and stepping. */
-int hppa_prepare_to_proceed PARAMS (());
-
-static int prologue_inst_adjust_sp PARAMS ((unsigned long));
-
-static int is_branch PARAMS ((unsigned long));
-
-static int inst_saves_gr PARAMS ((unsigned long));
-
-static int inst_saves_fr PARAMS ((unsigned long));
-
-static int pc_in_interrupt_handler PARAMS ((CORE_ADDR));
-
-static int pc_in_linker_stub PARAMS ((CORE_ADDR));
-
-static int compare_unwind_entries PARAMS ((const void *, const void *));
-
-static void read_unwind_info PARAMS ((struct objfile *));
-
-static void internalize_unwinds PARAMS ((struct objfile *,
-					 struct unwind_table_entry *,
-					 asection *, unsigned int,
-					 unsigned int, CORE_ADDR));
-static void pa_print_registers PARAMS ((char *, int, int));
-static void pa_strcat_registers PARAMS ((char *, int, int, GDB_FILE *));
-static void pa_register_look_aside PARAMS ((char *, int, long *));
-static void pa_print_fp_reg PARAMS ((int));
-static void pa_strcat_fp_reg PARAMS ((int, GDB_FILE *, enum precision_type));
-
-typedef struct {
-  struct minimal_symbol * msym;
-  CORE_ADDR solib_handle;
-} args_for_find_stub;
-
-static CORE_ADDR cover_find_stub_with_shl_get PARAMS ((args_for_find_stub *));
-
-static int is_pa_2 = 0;  /* False */
-
-/* This is declared in symtab.c; set to 1 in hp-symtab-read.c */ 
-extern int hp_som_som_object_present;
-
-/* In breakpoint.c */
-extern int exception_catchpoints_are_fragile;
-
-/* This is defined in valops.c. */
-extern value_ptr
-find_function_in_inferior PARAMS((char *));
-
-/* Should call_function allocate stack space for a struct return?  */
-int
-hppa_use_struct_convention (gcc_p, type)
-     int gcc_p;
-     struct type *type;
-{
-  return (TYPE_LENGTH (type) > 8);
-}
-
-
-/* Routines to extract various sized constants out of hppa 
-   instructions. */
-
-/* This assumes that no garbage lies outside of the lower bits of 
-   value. */
-
-static int
-sign_extend (val, bits)
-     unsigned val, bits;
-{
-  return (int)(val >> (bits - 1) ? (-1 << bits) | val : val);
-}
-
-/* For many immediate values the sign bit is the low bit! */
-
-static int
-low_sign_extend (val, bits)
-     unsigned val, bits;
-{
-  return (int)((val & 0x1 ? (-1 << (bits - 1)) : 0) | val >> 1);
-}
-
-/* extract the immediate field from a ld{bhw}s instruction */
-
-#if 0
-
-unsigned
-get_field (val, from, to)
-     unsigned val, from, to;
-{
-  val = val >> 31 - to;
-  return val & ((1 << 32 - from) - 1);
-}
-
-unsigned
-set_field (val, from, to, new_val)
-     unsigned *val, from, to;
-{
-  unsigned mask = ~((1 << (to - from + 1)) << (31 - from));
-  return *val = *val & mask | (new_val << (31 - from));
-}
-
-/* extract a 3-bit space register number from a be, ble, mtsp or mfsp */
-
-int
-extract_3 (word)
-     unsigned word;
-{
-  return GET_FIELD (word, 18, 18) << 2 | GET_FIELD (word, 16, 17);
-}
-
-#endif
-
-static int
-extract_5_load (word)
-     unsigned word;
-{
-  return low_sign_extend (word >> 16 & MASK_5, 5);
-}
-
-#if 0
-
-/* extract the immediate field from a st{bhw}s instruction */
-
-int
-extract_5_store (word)
-     unsigned word;
-{
-  return low_sign_extend (word & MASK_5, 5);
-}
-
-#endif	/* 0 */
-       
-/* extract the immediate field from a break instruction */
-
-static unsigned
-extract_5r_store (word)
-     unsigned word;
-{
-  return (word & MASK_5);
-}
-
-/* extract the immediate field from a {sr}sm instruction */
-
-static unsigned
-extract_5R_store (word)
-     unsigned word;
-{
-  return (word >> 16 & MASK_5);
-}
-
-/* extract an 11 bit immediate field */
-
-#if 0
-
-int
-extract_11 (word)
-     unsigned word;
-{
-  return low_sign_extend (word & MASK_11, 11);
-}
-
-#endif
-
-/* extract a 14 bit immediate field */
-
-static int
-extract_14 (word)
-     unsigned word;
-{
-  return low_sign_extend (word & MASK_14, 14);
-}
-
-/* deposit a 14 bit constant in a word */
-
-static unsigned
-deposit_14 (opnd, word)
-     int opnd;
-     unsigned word;
-{
-  unsigned sign = (opnd < 0 ? 1 : 0);
-
-  return word | ((unsigned)opnd << 1 & MASK_14)  | sign;
-}
-
-/* extract a 21 bit constant */
-
-static int
-extract_21 (word)
-     unsigned word;
-{
-  int val;
-
-  word &= MASK_21;
-  word <<= 11;
-  val = GET_FIELD (word, 20, 20);
-  val <<= 11;
-  val |= GET_FIELD (word, 9, 19);
-  val <<= 2;
-  val |= GET_FIELD (word, 5, 6);
-  val <<= 5;
-  val |= GET_FIELD (word, 0, 4);
-  val <<= 2;
-  val |= GET_FIELD (word, 7, 8);
-  return sign_extend (val, 21) << 11;
-}
-
-/* deposit a 21 bit constant in a word. Although 21 bit constants are
-   usually the top 21 bits of a 32 bit constant, we assume that only
-   the low 21 bits of opnd are relevant */
-
-static unsigned
-deposit_21 (opnd, word)
-     unsigned opnd, word;
-{
-  unsigned val = 0;
-
-  val |= GET_FIELD (opnd, 11 + 14, 11 + 18);
-  val <<= 2;
-  val |= GET_FIELD (opnd, 11 + 12, 11 + 13);
-  val <<= 2;
-  val |= GET_FIELD (opnd, 11 + 19, 11 + 20);
-  val <<= 11;
-  val |= GET_FIELD (opnd, 11 + 1, 11 + 11);
-  val <<= 1;
-  val |= GET_FIELD (opnd, 11 + 0, 11 + 0);
-  return word | val;
-}
-
-/* extract a 12 bit constant from branch instructions */
-
-#if 0
-
-int
-extract_12 (word)
-     unsigned word;
-{
-  return sign_extend (GET_FIELD (word, 19, 28) |
-		      GET_FIELD (word, 29, 29) << 10 |
-		      (word & 0x1) << 11, 12) << 2;
-}
-
-/* Deposit a 17 bit constant in an instruction (like bl). */
-
-unsigned int
-deposit_17 (opnd, word)
-     unsigned opnd, word;
-{
-  word |= GET_FIELD (opnd, 15 + 0, 15 + 0); /* w */
-  word |= GET_FIELD (opnd, 15 + 1, 15 + 5) << 16; /* w1 */
-  word |= GET_FIELD (opnd, 15 + 6, 15 + 6) << 2; /* w2[10] */
-  word |= GET_FIELD (opnd, 15 + 7, 15 + 16) << 3; /* w2[0..9] */
-
-  return word;
-}
-
-#endif
-
-/* extract a 17 bit constant from branch instructions, returning the
-   19 bit signed value. */
-
-static int
-extract_17 (word)
-     unsigned word;
-{
-  return sign_extend (GET_FIELD (word, 19, 28) |
-		      GET_FIELD (word, 29, 29) << 10 |
-		      GET_FIELD (word, 11, 15) << 11 |
-		      (word & 0x1) << 16, 17) << 2;
-}
-
-
-/* Compare the start address for two unwind entries returning 1 if 
-   the first address is larger than the second, -1 if the second is
-   larger than the first, and zero if they are equal.  */
-
-static int
-compare_unwind_entries (arg1, arg2)
-     const void *arg1;
-     const void *arg2;
-{
-  const struct unwind_table_entry *a = arg1;
-  const struct unwind_table_entry *b = arg2;
-
-  if (a->region_start > b->region_start)
-    return 1;
-  else if (a->region_start < b->region_start)
-    return -1;
-  else
-    return 0;
-}
-
-static void
-internalize_unwinds (objfile, table, section, entries, size, text_offset)
-     struct objfile *objfile;
-     struct unwind_table_entry *table;
-     asection *section;
-     unsigned int entries, size;
-     CORE_ADDR text_offset;
-{
-  /* We will read the unwind entries into temporary memory, then
-     fill in the actual unwind table.  */
-  if (size > 0)
-    {
-      unsigned long tmp;
-      unsigned i;
-      char *buf = alloca (size);
-
-      bfd_get_section_contents (objfile->obfd, section, buf, 0, size);
-
-      /* Now internalize the information being careful to handle host/target
-	 endian issues.  */
-      for (i = 0; i < entries; i++)
-	{
-	  table[i].region_start = bfd_get_32 (objfile->obfd,
-					      (bfd_byte *)buf);
-	  table[i].region_start += text_offset;
-	  buf += 4;
-	  table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
-	  table[i].region_end += text_offset;
-	  buf += 4;
-	  tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
-	  buf += 4;
-	  table[i].Cannot_unwind = (tmp >> 31) & 0x1;
-	  table[i].Millicode = (tmp >> 30) & 0x1;
-	  table[i].Millicode_save_sr0 = (tmp >> 29) & 0x1;
-	  table[i].Region_description = (tmp >> 27) & 0x3;
-	  table[i].reserved1 = (tmp >> 26) & 0x1;
-	  table[i].Entry_SR = (tmp >> 25) & 0x1;
-	  table[i].Entry_FR = (tmp >> 21) & 0xf;
-	  table[i].Entry_GR = (tmp >> 16) & 0x1f;
-	  table[i].Args_stored = (tmp >> 15) & 0x1;
-	  table[i].Variable_Frame = (tmp >> 14) & 0x1;
-	  table[i].Separate_Package_Body = (tmp >> 13) & 0x1;
-	  table[i].Frame_Extension_Millicode = (tmp >> 12) & 0x1;
-	  table[i].Stack_Overflow_Check = (tmp >> 11) & 0x1;
-	  table[i].Two_Instruction_SP_Increment = (tmp >> 10) & 0x1;
-	  table[i].Ada_Region = (tmp >> 9) & 0x1;
-	  table[i].cxx_info = (tmp >> 8) & 0x1;
-	  table[i].cxx_try_catch = (tmp >> 7) & 0x1;
-	  table[i].sched_entry_seq = (tmp >> 6) & 0x1;
-	  table[i].reserved2 = (tmp >> 5) & 0x1;
-	  table[i].Save_SP = (tmp >> 4) & 0x1;
-	  table[i].Save_RP = (tmp >> 3) & 0x1;
-	  table[i].Save_MRP_in_frame = (tmp >> 2) & 0x1;
-	  table[i].extn_ptr_defined = (tmp >> 1) & 0x1;
-	  table[i].Cleanup_defined = tmp & 0x1;
-	  tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
-	  buf += 4;
-	  table[i].MPE_XL_interrupt_marker = (tmp >> 31) & 0x1;
-	  table[i].HP_UX_interrupt_marker = (tmp >> 30) & 0x1;
-	  table[i].Large_frame = (tmp >> 29) & 0x1;
-	  table[i].Pseudo_SP_Set = (tmp >> 28) & 0x1;
-	  table[i].reserved4 = (tmp >> 27) & 0x1;
-	  table[i].Total_frame_size = tmp & 0x7ffffff;
-
-          /* Stub unwinds are handled elsewhere. */
-	  table[i].stub_unwind.stub_type = 0;
-	  table[i].stub_unwind.padding = 0;
-	}
-    }
-}
-
-/* Read in the backtrace information stored in the `$UNWIND_START$' section of
-   the object file.  This info is used mainly by find_unwind_entry() to find
-   out the stack frame size and frame pointer used by procedures.  We put
-   everything on the psymbol obstack in the objfile so that it automatically
-   gets freed when the objfile is destroyed.  */
-
-static void
-read_unwind_info (objfile)
-     struct objfile *objfile;
-{
-  asection *unwind_sec, *elf_unwind_sec, *stub_unwind_sec;
-  unsigned unwind_size, elf_unwind_size, stub_unwind_size, total_size;
-  unsigned index, unwind_entries, elf_unwind_entries;
-  unsigned stub_entries, total_entries;
-  CORE_ADDR text_offset;
-  struct obj_unwind_info *ui;
-  obj_private_data_t *obj_private;
-
-  text_offset = ANOFFSET (objfile->section_offsets, 0);
-  ui = (struct obj_unwind_info *)obstack_alloc (&objfile->psymbol_obstack,
-						sizeof (struct obj_unwind_info));
-
-  ui->table = NULL;
-  ui->cache = NULL;
-  ui->last = -1;
-
-  /* Get hooks to all unwind sections.   Note there is no linker-stub unwind
-     section in ELF at the moment.  */
-  unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_START$");
-  elf_unwind_sec = bfd_get_section_by_name (objfile->obfd, ".PARISC.unwind");
-  stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$");
-
-  /* Get sizes and unwind counts for all sections.  */
-  if (unwind_sec)
-    {
-      unwind_size = bfd_section_size (objfile->obfd, unwind_sec);
-      unwind_entries = unwind_size / UNWIND_ENTRY_SIZE;
-    }
-  else
-    {
-      unwind_size = 0;
-      unwind_entries = 0;
-    }
-
-  if (elf_unwind_sec)
-    {
-      elf_unwind_size = bfd_section_size (objfile->obfd, elf_unwind_sec); /* purecov: deadcode */
-      elf_unwind_entries = elf_unwind_size / UNWIND_ENTRY_SIZE; /* purecov: deadcode */
-    }
-  else
-    {
-      elf_unwind_size = 0;
-      elf_unwind_entries = 0;
-    }
-
-  if (stub_unwind_sec)
-    {
-      stub_unwind_size = bfd_section_size (objfile->obfd, stub_unwind_sec);
-      stub_entries = stub_unwind_size / STUB_UNWIND_ENTRY_SIZE;
-    }
-  else
-    {
-      stub_unwind_size = 0;
-      stub_entries = 0;
-    }
-
-  /* Compute total number of unwind entries and their total size.  */
-  total_entries = unwind_entries + elf_unwind_entries + stub_entries;
-  total_size = total_entries * sizeof (struct unwind_table_entry);
-
-  /* Allocate memory for the unwind table.  */
-  ui->table = (struct unwind_table_entry *)
-    obstack_alloc (&objfile->psymbol_obstack, total_size);
-   ui->last = total_entries - 1;
-
-  /* Internalize the standard unwind entries.  */
-  index = 0;
-  internalize_unwinds (objfile, &ui->table[index], unwind_sec,
-		       unwind_entries, unwind_size, text_offset);
-  index += unwind_entries;
-  internalize_unwinds (objfile, &ui->table[index], elf_unwind_sec,
-		       elf_unwind_entries, elf_unwind_size, text_offset);
-  index += elf_unwind_entries;
-
-  /* Now internalize the stub unwind entries.  */
-  if (stub_unwind_size > 0)
-    {
-      unsigned int i;
-      char *buf = alloca (stub_unwind_size);
-
-      /* Read in the stub unwind entries.  */
-      bfd_get_section_contents (objfile->obfd, stub_unwind_sec, buf,
-				0, stub_unwind_size);
-
-      /* Now convert them into regular unwind entries.  */
-      for (i = 0; i < stub_entries; i++, index++)
-	{
-	  /* Clear out the next unwind entry.  */
-	  memset (&ui->table[index], 0, sizeof (struct unwind_table_entry));
-
-	  /* Convert offset & size into region_start and region_end.  
-	     Stuff away the stub type into "reserved" fields.  */
-	  ui->table[index].region_start = bfd_get_32 (objfile->obfd,
-						      (bfd_byte *) buf);
-	  ui->table[index].region_start += text_offset;
-	  buf += 4;
-	  ui->table[index].stub_unwind.stub_type = bfd_get_8 (objfile->obfd,
-                                                              (bfd_byte *) buf);
-	  buf += 2;
-	  ui->table[index].region_end
-	    = ui->table[index].region_start + 4 * 
-	      (bfd_get_16 (objfile->obfd, (bfd_byte *) buf) - 1);
-	  buf += 2;
-	}
-
-    }
-
-  /* Unwind table needs to be kept sorted.  */
-  qsort (ui->table, total_entries, sizeof (struct unwind_table_entry),
-	 compare_unwind_entries);
-
-  /* Keep a pointer to the unwind information.  */
-  if(objfile->obj_private == NULL)
-    {
-      obj_private = (obj_private_data_t *)
-	obstack_alloc(&objfile->psymbol_obstack,
-		      sizeof(obj_private_data_t));
-      obj_private->unwind_info = NULL;
-      obj_private->so_info     = NULL;
-      
-      objfile->obj_private = (PTR) obj_private;
-    }
-  obj_private = (obj_private_data_t *)objfile->obj_private; 
-  obj_private->unwind_info = ui;
-}
-
-/* Lookup the unwind (stack backtrace) info for the given PC.  We search all
-   of the objfiles seeking the unwind table entry for this PC.  Each objfile
-   contains a sorted list of struct unwind_table_entry.  Since we do a binary
-   search of the unwind tables, we depend upon them to be sorted.  */
-
-struct unwind_table_entry *
-find_unwind_entry(pc)
-     CORE_ADDR pc;
-{
-  int first, middle, last;
-  struct objfile *objfile;
-
-  /* A function at address 0?  Not in HP-UX! */
-  if (pc == (CORE_ADDR) 0)
-    return NULL;
-
-  ALL_OBJFILES (objfile)
-    {
-      struct obj_unwind_info *ui;
-      ui = NULL;
-      if (objfile->obj_private)
-	ui = ((obj_private_data_t *)(objfile->obj_private))->unwind_info;
-
-      if (!ui)
-	{
-	  read_unwind_info (objfile);
-	  if (objfile->obj_private == NULL)
-	    error ("Internal error reading unwind information."); /* purecov: deadcode */
-	  ui = ((obj_private_data_t *)(objfile->obj_private))->unwind_info;
-	}
-
-      /* First, check the cache */
-
-      if (ui->cache
-	  && pc >= ui->cache->region_start
-	  && pc <= ui->cache->region_end)
-	return ui->cache;
-
-      /* Not in the cache, do a binary search */
-
-      first = 0;
-      last = ui->last;
-
-      while (first <= last)
-	{
-	  middle = (first + last) / 2;
-	  if (pc >= ui->table[middle].region_start
-	      && pc <= ui->table[middle].region_end)
-	    {
-	      ui->cache = &ui->table[middle];
-	      return &ui->table[middle];
-	    }
-
-	  if (pc < ui->table[middle].region_start)
-	    last = middle - 1;
-	  else
-	    first = middle + 1;
-	}
-    }				/* ALL_OBJFILES() */
-  return NULL;
-}
-
-/* Return the adjustment necessary to make for addresses on the stack
-   as presented by hpread.c.
-
-   This is necessary because of the stack direction on the PA and the
-   bizarre way in which someone (?) decided they wanted to handle
-   frame pointerless code in GDB.  */
-int
-hpread_adjust_stack_address (func_addr)
-     CORE_ADDR func_addr;
-{
-  struct unwind_table_entry *u;
-
-  u = find_unwind_entry (func_addr);
-  if (!u)
-    return 0;
-  else
-    return u->Total_frame_size << 3;
-}
-
-/* Called to determine if PC is in an interrupt handler of some
-   kind.  */
-
-static int
-pc_in_interrupt_handler (pc)
-     CORE_ADDR pc;
-{
-  struct unwind_table_entry *u;
-  struct minimal_symbol *msym_us;
-
-  u = find_unwind_entry (pc);
-  if (!u)
-    return 0;
-
-  /* Oh joys.  HPUX sets the interrupt bit for _sigreturn even though
-     its frame isn't a pure interrupt frame.  Deal with this.  */
-  msym_us = lookup_minimal_symbol_by_pc (pc);
-
-  return u->HP_UX_interrupt_marker && !IN_SIGTRAMP (pc, SYMBOL_NAME (msym_us));
-}
-
-/* Called when no unwind descriptor was found for PC.  Returns 1 if it
-   appears that PC is in a linker stub.  */
-
-static int
-pc_in_linker_stub (pc)
-     CORE_ADDR pc;
-{
-  int found_magic_instruction = 0;
-  int i;
-  char buf[4];
-
-  /* If unable to read memory, assume pc is not in a linker stub.  */
-  if (target_read_memory (pc, buf, 4) != 0)
-    return 0;
-
-  /* We are looking for something like
-
-     ; $$dyncall jams RP into this special spot in the frame (RP')
-     ; before calling the "call stub"
-     ldw     -18(sp),rp
-
-     ldsid   (rp),r1         ; Get space associated with RP into r1
-     mtsp    r1,sp           ; Move it into space register 0
-     be,n    0(sr0),rp)      ; back to your regularly scheduled program */
-
-  /* Maximum known linker stub size is 4 instructions.  Search forward
-     from the given PC, then backward.  */
-  for (i = 0; i < 4; i++)
-    {
-      /* If we hit something with an unwind, stop searching this direction.  */
-
-      if (find_unwind_entry (pc + i * 4) != 0)
-	break;
-
-      /* Check for ldsid (rp),r1 which is the magic instruction for a 
-	 return from a cross-space function call.  */
-      if (read_memory_integer (pc + i * 4, 4) == 0x004010a1)
-	{
-	  found_magic_instruction = 1;
-	  break;
-	}
-      /* Add code to handle long call/branch and argument relocation stubs
-	 here.  */
-    }
-
-  if (found_magic_instruction != 0)
-    return 1;
-
-  /* Now look backward.  */
-  for (i = 0; i < 4; i++)
-    {
-      /* If we hit something with an unwind, stop searching this direction.  */
-
-      if (find_unwind_entry (pc - i * 4) != 0)
-	break;
-
-      /* Check for ldsid (rp),r1 which is the magic instruction for a 
-	 return from a cross-space function call.  */
-      if (read_memory_integer (pc - i * 4, 4) == 0x004010a1)
-	{
-	  found_magic_instruction = 1;
-	  break;
-	}
-      /* Add code to handle long call/branch and argument relocation stubs
-	 here.  */
-    }
-  return found_magic_instruction;
-}
-
-static int
-find_return_regnum(pc)
-     CORE_ADDR pc;
-{
-  struct unwind_table_entry *u;
-
-  u = find_unwind_entry (pc);
-
-  if (!u)
-    return RP_REGNUM;
-
-  if (u->Millicode)
-    return 31;
-
-  return RP_REGNUM;
-}
-
-/* Return size of frame, or -1 if we should use a frame pointer.  */
-static int
-find_proc_framesize (pc)
-     CORE_ADDR pc;
-{
-  struct unwind_table_entry *u;
-  struct minimal_symbol *msym_us;
-
-  /* This may indicate a bug in our callers... */
-  if (pc == (CORE_ADDR)0)
-    return -1;
-  
-  u = find_unwind_entry (pc);
-
-  if (!u)
-    {
-      if (pc_in_linker_stub (pc))
-	/* Linker stubs have a zero size frame.  */
-	return 0;
-      else
-	return -1;
-    }
-
-  msym_us = lookup_minimal_symbol_by_pc (pc);
-
-  /* If Save_SP is set, and we're not in an interrupt or signal caller,
-     then we have a frame pointer.  Use it.  */
-  if (u->Save_SP && !pc_in_interrupt_handler (pc)
-      && !IN_SIGTRAMP (pc, SYMBOL_NAME (msym_us)))
-    return -1;
-
-  return u->Total_frame_size << 3;
-}
-
-/* Return offset from sp at which rp is saved, or 0 if not saved.  */
-static int rp_saved PARAMS ((CORE_ADDR));
-
-static int
-rp_saved (pc)
-     CORE_ADDR pc;
-{
-  struct unwind_table_entry *u;
-
-  /* A function at, and thus a return PC from, address 0?  Not in HP-UX! */
-  if (pc == (CORE_ADDR) 0)
-    return 0;
-
-  u = find_unwind_entry (pc);
-
-  if (!u)
-    {
-      if (pc_in_linker_stub (pc))
-	/* This is the so-called RP'.  */
-	return -24;
-      else
-	return 0;
-    }
-
-  if (u->Save_RP)
-    return -20;
-  else if (u->stub_unwind.stub_type != 0)
-    {
-      switch (u->stub_unwind.stub_type)
-	{
-	case EXPORT:
-	case IMPORT:
-	  return -24;
-	case PARAMETER_RELOCATION:
-	  return -8;
-	default:
-	  return 0;
-	}
-    }
-  else
-    return 0;
-}
-
-int
-frameless_function_invocation (frame)
-     struct frame_info *frame;
-{
-  struct unwind_table_entry *u;
-
-  u = find_unwind_entry (frame->pc);
-
-  if (u == 0)
-    return 0;
-
-  return (u->Total_frame_size == 0 && u->stub_unwind.stub_type == 0);
-}
-
-CORE_ADDR
-saved_pc_after_call (frame)
-     struct frame_info *frame;
-{
-  int ret_regnum;
-  CORE_ADDR pc;
-  struct unwind_table_entry *u;
-
-  ret_regnum = find_return_regnum (get_frame_pc (frame));
-  pc = read_register (ret_regnum) & ~0x3;
-  
-  /* If PC is in a linker stub, then we need to dig the address
-     the stub will return to out of the stack.  */
-  u = find_unwind_entry (pc);
-  if (u && u->stub_unwind.stub_type != 0)
-    return FRAME_SAVED_PC (frame);
-  else
-    return pc;
-}
-
-CORE_ADDR
-hppa_frame_saved_pc (frame)
-     struct frame_info *frame;
-{
-  CORE_ADDR pc = get_frame_pc (frame);
-  struct unwind_table_entry *u;
-  CORE_ADDR old_pc;
-  int  spun_around_loop = 0;
-  int  rp_offset = 0;
-
-  /* BSD, HPUX & OSF1 all lay out the hardware state in the same manner
-     at the base of the frame in an interrupt handler.  Registers within
-     are saved in the exact same order as GDB numbers registers.  How
-     convienent.  */
-  if (pc_in_interrupt_handler (pc))
-    return read_memory_integer (frame->frame + PC_REGNUM * 4, 4) & ~0x3;
-
-#ifdef FRAME_SAVED_PC_IN_SIGTRAMP
-  /* Deal with signal handler caller frames too.  */
-  if (frame->signal_handler_caller)
-    {
-      CORE_ADDR rp;
-      FRAME_SAVED_PC_IN_SIGTRAMP (frame, &rp);
-      return rp & ~0x3;
-    }
-#endif
-
-  if (frameless_function_invocation (frame))
-    {
-      int ret_regnum;
-
-      ret_regnum = find_return_regnum (pc);
-
-      /* If the next frame is an interrupt frame or a signal
-	 handler caller, then we need to look in the saved
-	 register area to get the return pointer (the values
-	 in the registers may not correspond to anything useful).  */
-      if (frame->next 
-	  && (frame->next->signal_handler_caller
-	      || pc_in_interrupt_handler (frame->next->pc)))
-	{
-	  struct frame_saved_regs saved_regs;
-
-	  get_frame_saved_regs (frame->next, &saved_regs);
-	  if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM], 4) & 0x2)
-	    {
-	      pc = read_memory_integer (saved_regs.regs[31], 4) & ~0x3;
-
-	      /* Syscalls are really two frames.  The syscall stub itself
-		 with a return pointer in %rp and the kernel call with
-		 a return pointer in %r31.  We return the %rp variant
-		 if %r31 is the same as frame->pc.  */
-	      if (pc == frame->pc)
-		pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
-	    }
-	  else
-	    pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
-	}
-      else
-	pc = read_register (ret_regnum) & ~0x3;
-    }
-  else
-    {
-      spun_around_loop = 0;
-      old_pc           = pc;
-
-restart:
-      rp_offset = rp_saved (pc);
-
-      /* Similar to code in frameless function case.  If the next
-	 frame is a signal or interrupt handler, then dig the right
-	 information out of the saved register info.  */
-      if (rp_offset == 0
-	  && frame->next
-	  && (frame->next->signal_handler_caller
-	      || pc_in_interrupt_handler (frame->next->pc)))
-	{
-	  struct frame_saved_regs saved_regs;
-
-	  get_frame_saved_regs (frame->next, &saved_regs);
-	  if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM], 4) & 0x2)
-	    {
-	      pc = read_memory_integer (saved_regs.regs[31], 4) & ~0x3;
-
-	      /* Syscalls are really two frames.  The syscall stub itself
-		 with a return pointer in %rp and the kernel call with
-		 a return pointer in %r31.  We return the %rp variant
-		 if %r31 is the same as frame->pc.  */
-	      if (pc == frame->pc)
-		pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
-	    }
-	  else
-	    pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
-	}
-      else if (rp_offset == 0)
-        {
-          old_pc = pc;
-          pc = read_register (RP_REGNUM) & ~0x3;
-        }
-      else
-        {
-          old_pc = pc;
-          pc = read_memory_integer (frame->frame + rp_offset, 4) & ~0x3;
-        }
-    }
-
-  /* If PC is inside a linker stub, then dig out the address the stub
-     will return to. 
-
-     Don't do this for long branch stubs.  Why?  For some unknown reason
-     _start is marked as a long branch stub in hpux10.  */
-  u = find_unwind_entry (pc);
-  if (u && u->stub_unwind.stub_type != 0
-      && u->stub_unwind.stub_type != LONG_BRANCH)
-    {
-      unsigned int insn;
-
-      /* If this is a dynamic executable, and we're in a signal handler,
-	 then the call chain will eventually point us into the stub for
-	 _sigreturn.  Unlike most cases, we'll be pointed to the branch
-	 to the real sigreturn rather than the code after the real branch!. 
-
-	 Else, try to dig the address the stub will return to in the normal
-	 fashion.  */
-      insn = read_memory_integer (pc, 4);
-      if ((insn & 0xfc00e000) == 0xe8000000)
-	return (pc + extract_17 (insn) + 8) & ~0x3;
-      else
-	{
-        if (old_pc == pc)
-            spun_around_loop++;
-        
-        if (spun_around_loop > 1) 
-	  {
-           /* We're just about to go around the loop again with
-              no more hope of success.  Die. */
-           error("Unable to find return pc for this frame");
-	  }
-        else
-	  goto restart;
-	}
-    }
-
-  return pc;
-}
-
-/* We need to correct the PC and the FP for the outermost frame when we are
-   in a system call.  */
-
-void
-init_extra_frame_info (fromleaf, frame)
-     int fromleaf;
-     struct frame_info *frame;
-{
-  int flags;
-  int framesize;
-
-  if (frame->next && !fromleaf)
-    return;
-
-  /* If the next frame represents a frameless function invocation
-     then we have to do some adjustments that are normally done by
-     FRAME_CHAIN.  (FRAME_CHAIN is not called in this case.)  */
-  if (fromleaf)
-    {
-      /* Find the framesize of *this* frame without peeking at the PC
-	 in the current frame structure (it isn't set yet).  */
-      framesize = find_proc_framesize (FRAME_SAVED_PC (get_next_frame (frame)));
-
-      /* Now adjust our base frame accordingly.  If we have a frame pointer
-	 use it, else subtract the size of this frame from the current
-	 frame.  (we always want frame->frame to point at the lowest address
-	 in the frame).  */
-      if (framesize == -1)
-	frame->frame = TARGET_READ_FP ();
-      else
-	frame->frame -= framesize;
-      return;
-    }
-
-  flags = read_register (FLAGS_REGNUM);
-  if (flags & 2)	/* In system call? */
-    frame->pc = read_register (31) & ~0x3;
-
-  /* The outermost frame is always derived from PC-framesize
-
-     One might think frameless innermost frames should have
-     a frame->frame that is the same as the parent's frame->frame.
-     That is wrong; frame->frame in that case should be the *high*
-     address of the parent's frame.  It's complicated as hell to
-     explain, but the parent *always* creates some stack space for
-     the child.  So the child actually does have a frame of some
-     sorts, and its base is the high address in its parent's frame.  */
-  framesize = find_proc_framesize(frame->pc);
-  if (framesize == -1)
-    frame->frame = TARGET_READ_FP ();
-  else
-    frame->frame = read_register (SP_REGNUM) - framesize;
-}
-
-/* Given a GDB frame, determine the address of the calling function's frame.
-   This will be used to create a new GDB frame struct, and then
-   INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
-
-   This may involve searching through prologues for several functions
-   at boundaries where GCC calls HP C code, or where code which has
-   a frame pointer calls code without a frame pointer.  */
-
-CORE_ADDR
-frame_chain (frame)
-     struct frame_info *frame;
-{
-  int my_framesize, caller_framesize;
-  struct unwind_table_entry *u;
-  CORE_ADDR frame_base;
-  struct frame_info *tmp_frame;
-
-  CORE_ADDR  caller_pc;
-
-  struct minimal_symbol *min_frame_symbol;
-  struct symbol         *frame_symbol;
-  char                  *frame_symbol_name;
-
-  /* If this is a threaded application, and we see the
-     routine "__pthread_exit", treat it as the stack root
-     for this thread. */
-  min_frame_symbol  = lookup_minimal_symbol_by_pc (frame->pc);
-  frame_symbol      = find_pc_function(frame->pc);
-
-  if ((min_frame_symbol != 0) /* && (frame_symbol == 0) */)
-    {
-    /* The test above for "no user function name" would defend
-       against the slim likelihood that a user might define a
-       routine named "__pthread_exit" and then try to debug it.
-
-       If it weren't commented out, and you tried to debug the
-       pthread library itself, you'd get errors.
-      
-       So for today, we don't make that check. */
-    frame_symbol_name = SYMBOL_NAME(min_frame_symbol);
-    if (frame_symbol_name != 0) {
-      if (0 == strncmp(frame_symbol_name,
-		       THREAD_INITIAL_FRAME_SYMBOL,
-		       THREAD_INITIAL_FRAME_SYM_LEN)) {
-         /* Pretend we've reached the bottom of the stack. */
-         return (CORE_ADDR) 0;
-         }
-       }  
-    }  /* End of hacky code for threads. */
-    
-  /* Handle HPUX, BSD, and OSF1 style interrupt frames first.  These
-     are easy; at *sp we have a full save state strucutre which we can
-     pull the old stack pointer from.  Also see frame_saved_pc for
-     code to dig a saved PC out of the save state structure.  */
-  if (pc_in_interrupt_handler (frame->pc))
-    frame_base = read_memory_integer (frame->frame + SP_REGNUM * 4, 4);
-#ifdef FRAME_BASE_BEFORE_SIGTRAMP
-  else if (frame->signal_handler_caller)
-    {
-      FRAME_BASE_BEFORE_SIGTRAMP (frame, &frame_base);
-    }
-#endif
-  else
-    frame_base = frame->frame;
-
-  /* Get frame sizes for the current frame and the frame of the 
-     caller.  */
-  my_framesize = find_proc_framesize (frame->pc);
-  caller_pc = FRAME_SAVED_PC(frame);
-
-  /* If we can't determine the caller's PC, then it's not likely we can
-     really determine anything meaningful about its frame.  We'll consider
-     this to be stack bottom. */
-  if (caller_pc == (CORE_ADDR) 0)
-    return (CORE_ADDR) 0;
-
-  caller_framesize = find_proc_framesize (FRAME_SAVED_PC(frame));
-
-  /* If caller does not have a frame pointer, then its frame
-     can be found at current_frame - caller_framesize.  */
-  if (caller_framesize != -1)
-    {
-      return frame_base - caller_framesize;
-    }
-  /* Both caller and callee have frame pointers and are GCC compiled
-     (SAVE_SP bit in unwind descriptor is on for both functions.
-     The previous frame pointer is found at the top of the current frame.  */
-  if (caller_framesize == -1 && my_framesize == -1)
-    {
-      return read_memory_integer (frame_base, 4);
-    }
-  /* Caller has a frame pointer, but callee does not.  This is a little
-     more difficult as GCC and HP C lay out locals and callee register save
-     areas very differently.
-
-     The previous frame pointer could be in a register, or in one of 
-     several areas on the stack.
-
-     Walk from the current frame to the innermost frame examining 
-     unwind descriptors to determine if %r3 ever gets saved into the
-     stack.  If so return whatever value got saved into the stack.
-     If it was never saved in the stack, then the value in %r3 is still
-     valid, so use it. 
-
-     We use information from unwind descriptors to determine if %r3
-     is saved into the stack (Entry_GR field has this information).  */
-
-  tmp_frame = frame;
-  while (tmp_frame)
-    {
-      u = find_unwind_entry (tmp_frame->pc);
-
-      if (!u)
-	{
-	  /* We could find this information by examining prologues.  I don't
-	     think anyone has actually written any tools (not even "strip")
-	     which leave them out of an executable, so maybe this is a moot
-	     point.  */
-          /* ??rehrauer: Actually, it's quite possible to stepi your way into
-             code that doesn't have unwind entries.  For example, stepping into
-             the dynamic linker will give you a PC that has none.  Thus, I've
-             disabled this warning. */
-#if 0
-	  warning ("Unable to find unwind for PC 0x%x -- Help!", tmp_frame->pc);
-#endif
-	  return (CORE_ADDR) 0;
-	}
-
-      /* Entry_GR specifies the number of callee-saved general registers
-	 saved in the stack.  It starts at %r3, so %r3 would be 1.  */
-      if (u->Entry_GR >= 1 || u->Save_SP
-	  || tmp_frame->signal_handler_caller
-	  || pc_in_interrupt_handler (tmp_frame->pc))
-	break;
-      else
-	tmp_frame = tmp_frame->next;
-    }
-
-  if (tmp_frame)
-    {
-      /* We may have walked down the chain into a function with a frame
-	 pointer.  */
-      if (u->Save_SP
-	  && !tmp_frame->signal_handler_caller
-	  && !pc_in_interrupt_handler (tmp_frame->pc))
-	{
-	  return read_memory_integer (tmp_frame->frame, 4);
-	}
-      /* %r3 was saved somewhere in the stack.  Dig it out.  */
-      else 
-	{
-	  struct frame_saved_regs saved_regs;
-
-	  /* Sick.
-
-	     For optimization purposes many kernels don't have the
-	     callee saved registers into the save_state structure upon
-	     entry into the kernel for a syscall; the optimization
-	     is usually turned off if the process is being traced so
-	     that the debugger can get full register state for the
-	     process.
-	      
-	     This scheme works well except for two cases:
-
-	       * Attaching to a process when the process is in the
-	       kernel performing a system call (debugger can't get
-	       full register state for the inferior process since
-	       the process wasn't being traced when it entered the
-	       system call).
-
-	       * Register state is not complete if the system call
-	       causes the process to core dump.
-
-
-	     The following heinous code is an attempt to deal with
-	     the lack of register state in a core dump.  It will
-	     fail miserably if the function which performs the
-	     system call has a variable sized stack frame.  */
-
-	  get_frame_saved_regs (tmp_frame, &saved_regs);
-
-	  /* Abominable hack.  */
-	  if (current_target.to_has_execution == 0
-	      && ((saved_regs.regs[FLAGS_REGNUM]
-	           && (read_memory_integer (saved_regs.regs[FLAGS_REGNUM], 4)
-		       & 0x2))
-		  || (saved_regs.regs[FLAGS_REGNUM] == 0
-		      && read_register (FLAGS_REGNUM) & 0x2)))
-	    {
-	      u = find_unwind_entry (FRAME_SAVED_PC (frame));
-	      if (!u)
-		{
-		  return read_memory_integer (saved_regs.regs[FP_REGNUM], 4);
-		}
-	      else
-		{
-		  return frame_base - (u->Total_frame_size << 3);
-		}
-	    }
-	
-	  return read_memory_integer (saved_regs.regs[FP_REGNUM], 4);
-	}
-    }
-  else
-    {
-      struct frame_saved_regs saved_regs;
-
-      /* Get the innermost frame.  */
-      tmp_frame = frame;
-      while (tmp_frame->next != NULL)
-	tmp_frame = tmp_frame->next;
-
-      get_frame_saved_regs (tmp_frame, &saved_regs);
-      /* Abominable hack.  See above.  */
-      if (current_target.to_has_execution == 0
-	  && ((saved_regs.regs[FLAGS_REGNUM]
-	       && (read_memory_integer (saved_regs.regs[FLAGS_REGNUM], 4)
-		   & 0x2))
-	      || (saved_regs.regs[FLAGS_REGNUM] == 0
-		  && read_register (FLAGS_REGNUM)  & 0x2)))
-	{
-	  u = find_unwind_entry (FRAME_SAVED_PC (frame));
-	  if (!u)
-	    {
-	      return read_memory_integer (saved_regs.regs[FP_REGNUM], 4);
-	    }
-	   else
-	     {
-	       return frame_base - (u->Total_frame_size << 3);
-	     }
-	}
-	
-      /* The value in %r3 was never saved into the stack (thus %r3 still
-	 holds the value of the previous frame pointer).  */
-      return TARGET_READ_FP ();
-    }
-}
-
-
-/* To see if a frame chain is valid, see if the caller looks like it
-   was compiled with gcc. */
-
-int
-hppa_frame_chain_valid (chain, thisframe)
-     CORE_ADDR chain;
-     struct frame_info *thisframe;
-{
-  struct minimal_symbol *msym_us;
-  struct minimal_symbol *msym_start;
-  struct unwind_table_entry *u, *next_u = NULL;
-  struct frame_info *next;
-
-  if (!chain)
-    return 0;
-
-  u = find_unwind_entry (thisframe->pc);
-
-  if (u == NULL)
-    return 1;
-
-  /* We can't just check that the same of msym_us is "_start", because
-     someone idiotically decided that they were going to make a Ltext_end
-     symbol with the same address.  This Ltext_end symbol is totally
-     indistinguishable (as nearly as I can tell) from the symbol for a function
-     which is (legitimately, since it is in the user's namespace)
-     named Ltext_end, so we can't just ignore it.  */
-  msym_us = lookup_minimal_symbol_by_pc (FRAME_SAVED_PC (thisframe));
-  msym_start = lookup_minimal_symbol ("_start", NULL, NULL);
-  if (msym_us
-      && msym_start
-      && SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start))
-    return 0;
-
-  /* Grrrr.  Some new idiot decided that they don't want _start for the
-     PRO configurations; $START$ calls main directly....  Deal with it.  */
-  msym_start = lookup_minimal_symbol ("$START$", NULL, NULL);
-  if (msym_us
-      && msym_start
-      && SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start))
-    return 0;
-
-  next = get_next_frame (thisframe);
-  if (next)
-    next_u = find_unwind_entry (next->pc);
-
-  /* If this frame does not save SP, has no stack, isn't a stub,
-     and doesn't "call" an interrupt routine or signal handler caller,
-     then its not valid.  */
-  if (u->Save_SP || u->Total_frame_size || u->stub_unwind.stub_type != 0
-      || (thisframe->next && thisframe->next->signal_handler_caller)
-      || (next_u && next_u->HP_UX_interrupt_marker))
-    return 1;
-
-  if (pc_in_linker_stub (thisframe->pc))
-    return 1;
-
-  return 0;
-}
-
-/*
-   These functions deal with saving and restoring register state
-   around a function call in the inferior. They keep the stack
-   double-word aligned; eventually, on an hp700, the stack will have
-   to be aligned to a 64-byte boundary. */
-
-void
-push_dummy_frame (inf_status)
-     struct inferior_status *inf_status;
-{
-  CORE_ADDR sp, pc, pcspace;
-  register int regnum;
-  int int_buffer;
-  double freg_buffer;
-
-  /* Oh, what a hack.  If we're trying to perform an inferior call
-     while the inferior is asleep, we have to make sure to clear
-     the "in system call" bit in the flag register (the call will
-     start after the syscall returns, so we're no longer in the system
-     call!)  This state is kept in "inf_status", change it there.
-
-     We also need a number of horrid hacks to deal with lossage in the
-     PC queue registers (apparently they're not valid when the in syscall
-     bit is set).  */
-  pc = target_read_pc (inferior_pid);
-  int_buffer = read_register (FLAGS_REGNUM);
-  if (int_buffer & 0x2)
-    {
-      unsigned int sid;
-      int_buffer &= ~0x2;
-      memcpy (inf_status->registers, &int_buffer, 4);
-      memcpy (inf_status->registers + REGISTER_BYTE (PCOQ_HEAD_REGNUM), &pc, 4);
-      pc += 4;
-      memcpy (inf_status->registers + REGISTER_BYTE (PCOQ_TAIL_REGNUM), &pc, 4);
-      pc -= 4;
-      sid = (pc >> 30) & 0x3;
-      if (sid == 0)
-	pcspace = read_register (SR4_REGNUM);
-      else
-	pcspace = read_register (SR4_REGNUM + 4 + sid);
-      memcpy (inf_status->registers + REGISTER_BYTE (PCSQ_HEAD_REGNUM),
-	      &pcspace, 4);
-      memcpy (inf_status->registers + REGISTER_BYTE (PCSQ_TAIL_REGNUM),
-	      &pcspace, 4);
-    }
-  else
-    pcspace = read_register (PCSQ_HEAD_REGNUM);
-
-  /* Space for "arguments"; the RP goes in here. */
-  sp = read_register (SP_REGNUM) + 48;
-  int_buffer = read_register (RP_REGNUM) | 0x3;
-  write_memory (sp - 20, (char *)&int_buffer, 4);
-
-  int_buffer = TARGET_READ_FP ();
-  write_memory (sp, (char *)&int_buffer, 4);
-
-  write_register (FP_REGNUM, sp);
-
-  sp += 8;
-
-  for (regnum = 1; regnum < 32; regnum++)
-    if (regnum != RP_REGNUM && regnum != FP_REGNUM)
-      sp = push_word (sp, read_register (regnum));
-
-  sp += 4;
-
-  for (regnum = FP0_REGNUM; regnum < NUM_REGS; regnum++)
-    {
-      read_register_bytes (REGISTER_BYTE (regnum), (char *)&freg_buffer, 8);
-      sp = push_bytes (sp, (char *)&freg_buffer, 8);
-    }
-  sp = push_word (sp, read_register (IPSW_REGNUM));
-  sp = push_word (sp, read_register (SAR_REGNUM));
-  sp = push_word (sp, pc);
-  sp = push_word (sp, pcspace);
-  sp = push_word (sp, pc + 4);
-  sp = push_word (sp, pcspace);
-  write_register (SP_REGNUM, sp);
-}
-
-static void
-find_dummy_frame_regs (frame, frame_saved_regs)
-     struct frame_info *frame;
-     struct frame_saved_regs *frame_saved_regs;
-{
-  CORE_ADDR fp = frame->frame;
-  int i;
-
-  frame_saved_regs->regs[RP_REGNUM] = (fp - 20) & ~0x3;
-  frame_saved_regs->regs[FP_REGNUM] = fp;
-  frame_saved_regs->regs[1] = fp + 8;
-
-  for (fp += 12, i = 3; i < 32; i++)
-    {
-      if (i != FP_REGNUM)
-	{
-	  frame_saved_regs->regs[i] = fp;
-	  fp += 4;
-	}
-    }
-
-  fp += 4;
-  for (i = FP0_REGNUM; i < NUM_REGS; i++, fp += 8)
-    frame_saved_regs->regs[i] = fp;
-
-  frame_saved_regs->regs[IPSW_REGNUM] = fp;
-  frame_saved_regs->regs[SAR_REGNUM] = fp + 4;
-  frame_saved_regs->regs[PCOQ_HEAD_REGNUM] = fp + 8;
-  frame_saved_regs->regs[PCSQ_HEAD_REGNUM] = fp + 12;
-  frame_saved_regs->regs[PCOQ_TAIL_REGNUM] = fp + 16;
-  frame_saved_regs->regs[PCSQ_TAIL_REGNUM] = fp + 20;
-}
-
-void
-hppa_pop_frame ()
-{
-  register struct frame_info *frame = get_current_frame ();
-  register CORE_ADDR fp, npc, target_pc;
-  register int regnum;
-  struct frame_saved_regs fsr;
-  double freg_buffer;
-
-  fp = FRAME_FP (frame);
-  get_frame_saved_regs (frame, &fsr);
-
-#ifndef NO_PC_SPACE_QUEUE_RESTORE
-  if (fsr.regs[IPSW_REGNUM])    /* Restoring a call dummy frame */
-    restore_pc_queue (&fsr);
-#endif
-
-  for (regnum = 31; regnum > 0; regnum--)
-    if (fsr.regs[regnum])
-      write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
-
-  for (regnum = NUM_REGS - 1; regnum >= FP0_REGNUM ; regnum--)
-    if (fsr.regs[regnum])
-      {
-	read_memory (fsr.regs[regnum], (char *)&freg_buffer, 8);
-        write_register_bytes (REGISTER_BYTE (regnum), (char *)&freg_buffer, 8);
-      }
-
-  if (fsr.regs[IPSW_REGNUM])
-    write_register (IPSW_REGNUM,
-                    read_memory_integer (fsr.regs[IPSW_REGNUM], 4));
-
-  if (fsr.regs[SAR_REGNUM])
-    write_register (SAR_REGNUM,
-                    read_memory_integer (fsr.regs[SAR_REGNUM], 4));
-
-  /* If the PC was explicitly saved, then just restore it.  */
-  if (fsr.regs[PCOQ_TAIL_REGNUM])
-    {
-      npc = read_memory_integer (fsr.regs[PCOQ_TAIL_REGNUM], 4);
-      write_register (PCOQ_TAIL_REGNUM, npc);
-    }
-  /* Else use the value in %rp to set the new PC.  */
-  else 
-    {
-      npc = read_register (RP_REGNUM);
-      write_pc (npc);
-    }
-
-  write_register (FP_REGNUM, read_memory_integer (fp, 4));
-
-  if (fsr.regs[IPSW_REGNUM])    /* call dummy */
-    write_register (SP_REGNUM, fp - 48);
-  else
-    write_register (SP_REGNUM, fp);
-
-  /* The PC we just restored may be inside a return trampoline.  If so
-     we want to restart the inferior and run it through the trampoline.
-
-     Do this by setting a momentary breakpoint at the location the
-     trampoline returns to. 
-
-     Don't skip through the trampoline if we're popping a dummy frame.  */
-  target_pc = SKIP_TRAMPOLINE_CODE (npc & ~0x3) & ~0x3;
-  if (target_pc && !fsr.regs[IPSW_REGNUM])
-    {
-      struct symtab_and_line sal;
-      struct breakpoint *breakpoint;
-      struct cleanup *old_chain;
-
-      /* Set up our breakpoint.   Set it to be silent as the MI code
-	 for "return_command" will print the frame we returned to.  */
-      sal = find_pc_line (target_pc, 0);
-      sal.pc = target_pc;
-      breakpoint = set_momentary_breakpoint (sal, NULL, bp_finish);
-      breakpoint->silent = 1;
-
-      /* So we can clean things up.  */
-      old_chain = make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint);
-
-      /* Start up the inferior.  */
-      clear_proceed_status ();
-      proceed_to_finish = 1;
-      proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
-
-      /* Perform our cleanups.  */
-      do_cleanups (old_chain);
-    }
-  flush_cached_frames ();
-}
-
-/* After returning to a dummy on the stack, restore the instruction
-   queue space registers. */
-
-static int
-restore_pc_queue (fsr)
-     struct frame_saved_regs *fsr;
-{
-  CORE_ADDR pc = read_pc ();
-  CORE_ADDR new_pc = read_memory_integer (fsr->regs[PCOQ_HEAD_REGNUM], 4);
-  struct target_waitstatus w;
-  int insn_count;
-
-  /* Advance past break instruction in the call dummy. */
-  write_register (PCOQ_HEAD_REGNUM, pc + 4);
-  write_register (PCOQ_TAIL_REGNUM, pc + 8);
-
-  /* HPUX doesn't let us set the space registers or the space
-     registers of the PC queue through ptrace. Boo, hiss.
-     Conveniently, the call dummy has this sequence of instructions
-     after the break:
-        mtsp r21, sr0
-        ble,n 0(sr0, r22)
-    
-     So, load up the registers and single step until we are in the
-     right place. */
-
-  write_register (21, read_memory_integer (fsr->regs[PCSQ_HEAD_REGNUM], 4));
-  write_register (22, new_pc);
-
-  for (insn_count = 0; insn_count < 3; insn_count++)
-    {
-      /* FIXME: What if the inferior gets a signal right now?  Want to
-	 merge this into wait_for_inferior (as a special kind of
-	 watchpoint?  By setting a breakpoint at the end?  Is there
-	 any other choice?  Is there *any* way to do this stuff with
-	 ptrace() or some equivalent?).  */
-      resume (1, 0);
-      target_wait (inferior_pid, &w);
-
-      if (w.kind == TARGET_WAITKIND_SIGNALLED)
-        {
-          stop_signal = w.value.sig;
-          terminal_ours_for_output ();
-          printf_unfiltered ("\nProgram terminated with signal %s, %s.\n",
-			     target_signal_to_name (stop_signal),
-			     target_signal_to_string (stop_signal));
-          gdb_flush (gdb_stdout);
-          return 0;
-        }
-    }
-  target_terminal_ours ();
-  target_fetch_registers (-1);
-  return 1;
-}
-
-#if 0
-CORE_ADDR
-hppa_push_arguments (nargs, args, sp, struct_return, struct_addr)
-     int nargs;
-     value_ptr *args;
-     CORE_ADDR sp;
-     int struct_return;
-     CORE_ADDR struct_addr;
-{
-  /* array of arguments' offsets */
-  int *offset = (int *)alloca(nargs * sizeof (int));
-  int cum = 0;
-  int i, alignment;
-  
-  for (i = 0; i < nargs; i++)
-    {
-      int x = 0;
-      /* cum is the sum of the lengths in bytes of
-	 the arguments seen so far */
-      cum += TYPE_LENGTH (VALUE_TYPE (args[i]));
-
-    /* value must go at proper alignment. Assume alignment is a
-	 power of two. */
-      alignment = hppa_alignof (VALUE_TYPE (args[i]));
-
-      if (cum % alignment)
-	cum = (cum + alignment) & -alignment;
-      offset[i] = -cum;
-
-    }
-  sp += max ((cum + 7) & -8, 16);
-
-  for (i = 0; i < nargs; i++)
-    write_memory (sp + offset[i], VALUE_CONTENTS (args[i]),
-		  TYPE_LENGTH (VALUE_TYPE (args[i])));
-
-  if (struct_return)
-    write_register (28, struct_addr);
-  return sp + 32;
-}
-#endif
-
-/* elz: I am rewriting this function, because the one above is a very 
-   obscure piece of code.
-   This function pushes the arguments on the stack. The stack grows up
-   on the PA. 
-   Each argument goes in one (or more) word (4 bytes) on the stack.
-   The first four words for the args must be allocated, even if they 
-   are not used. 
-   The 'topmost' arg is arg0, the 'bottom-most' is arg3. (if you think of 
-   them as 1 word long).
-   Below these there can be any number of arguments, as needed by the function.
-   If an arg is bigger than one word, it will be written on the stack 
-   occupying as many words as needed. Args that are bigger than 64bits
-   are not copied on the stack, a pointer is passed instead.
-
-   On top of the arg0 word there are other 8 words (32bytes) which are used
-   for other purposes */
-
-CORE_ADDR
-hppa_push_arguments (nargs, args, sp, struct_return, struct_addr)
-     int nargs;
-     value_ptr *args;
-     CORE_ADDR sp;
-     int struct_return;
-     CORE_ADDR struct_addr;
-{
-  /* array of arguments' offsets */
-  int *offset = (int *)alloca(nargs * sizeof (int));
-  /* array of arguments' lengths: real lengths in bytes, not aligned to word size */
-  int *lengths = (int *)alloca(nargs * sizeof (int));
-
-  int bytes_reserved; /* this is the number of bytes on the stack occupied by an
-                         argument. This will be always a multiple of 4 */
-
-  int cum_bytes_reserved = 0; /* this is the total number of bytes reserved by the args
-                                 seen so far. It is a multiple of 4 always */
-  int cum_bytes_aligned = 0; /* same as above, but aligned on 8 bytes */
-  int i; 
-
-  /* When an arg does not occupy a whole word, for instance in bitfields:
-     if the arg is x bits (0<x<32), it must be written
-     starting from the (x-1)-th position  down until the 0-th position. 
-     It is enough to align it to the word. */ 
-  /* if an arg occupies 8 bytes, it must be aligned on the 64-bits 
-     high order word in odd arg word. */
-  /* if an arg is larger than 64 bits, we need to pass a pointer to it, and
-     copy the actual value on the stack, so that the callee can play with it.
-     This is taken care of in valops.c in the call_function_by_hand function.
-     The argument that is received in this function here has already be converted
-     to a pointer to whatever is needed, so that it just can be pushed
-     as a word argument */
-  
-  for (i = 0; i < nargs; i++)
-    {
-
-      lengths[i] = TYPE_LENGTH (VALUE_TYPE (args[i]));
-
-      if (lengths[i] % 4)
-        bytes_reserved = (lengths[i] / 4) * 4 + 4;
-      else 
-        bytes_reserved = lengths[i];
-
-      offset[i] = cum_bytes_reserved + lengths[i];
-
-      if ((bytes_reserved == 8) && (offset[i] % 8)) /* if 64-bit arg is not 64 bit aligned */
-      {
-        int new_offset=0;
-        /* bytes_reserved is already aligned to the word, so we put it at one word
-           more down the stack. This will leave one empty word on the
-           stack, and one unused register. This is OK, see the calling
-           convention doc */
-        /* the offset may have to be moved to the corresponding position
-           one word down the stack, to maintain 
-           alignment. */
-        new_offset = (offset[i] / 8) * 8 + 8;
-        if ((new_offset - offset[i]) >=4) 
-        {
-         bytes_reserved += 4;
-         offset[i] += 4;
-        }
-      }
-
-      cum_bytes_reserved += bytes_reserved;
-
-    }
-
-  /* now move up the sp to reserve at least 4 words required for the args,
-     or more than this if needed */
-  /* wee also need to keep the sp aligned to 8 bytes */
-  cum_bytes_aligned = STACK_ALIGN (cum_bytes_reserved);
-  sp += max (cum_bytes_aligned, 16);
-
-  /* now write each of the args at the proper offset down the stack */
-  for (i = 0; i < nargs; i++)
-    write_memory (sp - offset[i], VALUE_CONTENTS (args[i]), lengths[i]);
-		  
-
- /* if a structure has to be returned, set up register 28 to hold its address */
-  if (struct_return)
-    write_register (28, struct_addr);
-
- /* the stack will have other 8 words on top of the args */
-  return sp + 32;
-}
-
-
-/* elz: this function returns a value which is built looking at the given address.
-   It is called from call_function_by_hand, in case we need to return a 
-   value which is larger than 64 bits, and it is stored in the stack rather than 
-   in the registers r28 and r29 or fr4.
-   This function does the same stuff as value_being_returned in values.c, but
-   gets the value from the stack rather than from the buffer where all the
-   registers were saved when the function called completed. */
-value_ptr
-hppa_value_returned_from_stack (valtype , addr)
-     register struct type *valtype;
-     CORE_ADDR addr;
-{
-  register value_ptr val;
-
-  val = allocate_value (valtype);
-  CHECK_TYPEDEF (valtype);
-  target_read_memory(addr, VALUE_CONTENTS_RAW (val), TYPE_LENGTH (valtype));
-
-  return val;
-}
-
-
-
-/* elz: Used to lookup a symbol in the shared libraries.
- This function calls shl_findsym, indirectly through a
- call to __d_shl_get. __d_shl_get is in end.c, which is always
- linked in by the hp compilers/linkers. 
- The call to shl_findsym cannot be made directly because it needs
- to be active in target address space. 
- inputs: - minimal symbol pointer for the function we want to look up
-         - address in target space of the descriptor for the library
-           where we want to look the symbol up.
-           This address is retrieved using the 
-           som_solib_get_solib_by_pc function (somsolib.c). 
- output: - real address in the library of the function.          
- note: the handle can be null, in which case shl_findsym will look for
-       the symbol in all the loaded shared libraries.
- files to look at if you need reference on this stuff:
- dld.c, dld_shl_findsym.c
- end.c
- man entry for shl_findsym */        
-
-CORE_ADDR
-find_stub_with_shl_get(function, handle) 
-  struct minimal_symbol *function;
-  CORE_ADDR handle;
-{
- struct symbol *get_sym, *symbol2;
- struct minimal_symbol *buff_minsym, *msymbol;
- struct type *ftype;
- value_ptr *args;
- value_ptr funcval, val;
-
- int x, namelen, err_value, tmp = -1;
- CORE_ADDR endo_buff_addr, value_return_addr, errno_return_addr;
- CORE_ADDR stub_addr;
-
-
-    args           = (value_ptr *) alloca (sizeof (value_ptr) * 8);  /* 6 for the arguments and one null one??? */
-    funcval        = find_function_in_inferior("__d_shl_get");
-    get_sym        = lookup_symbol("__d_shl_get", NULL, VAR_NAMESPACE, NULL, NULL);
-    buff_minsym    = lookup_minimal_symbol("__buffer", NULL, NULL);
-    msymbol        = lookup_minimal_symbol ("__shldp", NULL, NULL);
-    symbol2 = lookup_symbol("__shldp", NULL, VAR_NAMESPACE, NULL, NULL);
-    endo_buff_addr = SYMBOL_VALUE_ADDRESS (buff_minsym);
-    namelen        = strlen(SYMBOL_NAME(function));
-    value_return_addr = endo_buff_addr + namelen;
-    ftype          = check_typedef(SYMBOL_TYPE(get_sym));
-
-    /* do alignment */
-    if ((x=value_return_addr % 64) !=0)
-       value_return_addr = value_return_addr + 64 - x;
-
-    errno_return_addr = value_return_addr + 64;
-
-    
-    /* set up stuff needed by __d_shl_get in buffer in end.o */
-
-    target_write_memory(endo_buff_addr, SYMBOL_NAME(function), namelen);
-    
-    target_write_memory(value_return_addr, (char *) &tmp, 4);
-    
-    target_write_memory(errno_return_addr, (char *) &tmp, 4);
-
-    target_write_memory(SYMBOL_VALUE_ADDRESS(msymbol), 
-                        (char *)&handle, 4);
-    
-    /* now prepare the arguments for the call */
-
-    args[0] = value_from_longest (TYPE_FIELD_TYPE(ftype, 0), 12);
-    args[1] = value_from_longest (TYPE_FIELD_TYPE(ftype, 1), SYMBOL_VALUE_ADDRESS(msymbol));
-    args[2] = value_from_longest (TYPE_FIELD_TYPE(ftype, 2), endo_buff_addr);
-    args[3] = value_from_longest (TYPE_FIELD_TYPE(ftype, 3), TYPE_PROCEDURE);
-    args[4] = value_from_longest (TYPE_FIELD_TYPE(ftype, 4), value_return_addr);
-    args[5] = value_from_longest (TYPE_FIELD_TYPE(ftype, 5), errno_return_addr);
-
-    /* now call the function */
-
-    val = call_function_by_hand(funcval, 6, args);
-
-    /* now get the results */
-
-    target_read_memory(errno_return_addr, (char *) &err_value, sizeof(err_value));
-
-    target_read_memory(value_return_addr, (char *) &stub_addr, sizeof(stub_addr));
-    if (stub_addr <= 0)
-        error("call to __d_shl_get failed, error code is %d", err_value); /* purecov: deadcode */
-    
-    return(stub_addr);
-}
-
-/* Cover routine for find_stub_with_shl_get to pass to catch_errors */ 
-static CORE_ADDR
-cover_find_stub_with_shl_get (args)
-  args_for_find_stub * args;
-{
-  return find_stub_with_shl_get (args->msym, args->solib_handle);
-}
-
-
-/* Insert the specified number of args and function address
-   into a call sequence of the above form stored at DUMMYNAME.
-
-   On the hppa we need to call the stack dummy through $$dyncall.
-   Therefore our version of FIX_CALL_DUMMY takes an extra argument,
-   real_pc, which is the location where gdb should start up the
-   inferior to do the function call. */
-
-CORE_ADDR
-hppa_fix_call_dummy (dummy, pc, fun, nargs, args, type, gcc_p)
-     char *dummy;
-     CORE_ADDR pc;
-     CORE_ADDR fun;
-     int nargs;
-     value_ptr *args;
-     struct type *type;
-     int gcc_p;
-{
-  CORE_ADDR dyncall_addr;
-  struct minimal_symbol *msymbol;
-  struct minimal_symbol *trampoline;
-  int flags = read_register (FLAGS_REGNUM);
-  struct unwind_table_entry *u;
-  CORE_ADDR new_stub=0;
-  CORE_ADDR solib_handle=0;
-
-  trampoline = NULL;
-  msymbol = lookup_minimal_symbol ("$$dyncall", NULL, NULL);
-  if (msymbol == NULL)
-    error ("Can't find an address for $$dyncall trampoline"); /* purecov: deadcode */
-
-  dyncall_addr = SYMBOL_VALUE_ADDRESS (msymbol);
-
-  /* FUN could be a procedure label, in which case we have to get
-     its real address and the value of its GOT/DP.  */
-  if (fun & 0x2)
-    {
-      /* Get the GOT/DP value for the target function.  It's
-	 at *(fun+4).  Note the call dummy is *NOT* allowed to
-	 trash %r19 before calling the target function.  */
-      write_register (19, read_memory_integer ((fun & ~0x3) + 4, 4));
-
-      /* Now get the real address for the function we are calling, it's
-	 at *fun.  */
-      fun = (CORE_ADDR) read_memory_integer (fun & ~0x3, 4);
-    }
-  else
-    {
-
-#ifndef GDB_TARGET_IS_PA_ELF
-      /* FUN could be either an export stub, or the real address of a
-	 function in a shared library.  We must call an import stub
-	 rather than the export stub or real function for lazy binding
-	 to work correctly.  */
-
-      /* elz: let's see if fun is in a shared library */
-      solib_handle = som_solib_get_solib_by_pc(fun);
-
-      /* elz: for 10.30 and 11.00 the calls via __d_plt_call cannot be made
-	 via import stubs, only via plables, so this code here becomes useless.
-	 On 10.20, the plables mechanism works too, so we just ignore this import 
-	 stub stuff */
-#if 0
-      if (solib_handle)
-	{
-	  struct objfile *objfile;
-	  struct minimal_symbol *funsymbol, *stub_symbol;
-	  CORE_ADDR newfun = 0;
-
-	  funsymbol = lookup_minimal_symbol_by_pc (fun);
-	  if (!funsymbol)
-	    error ("Unable to find minimal symbol for target fucntion.\n");
-
-	  /* Search all the object files for an import symbol with the
-	     right name. */
-	  ALL_OBJFILES (objfile)
-	    {
-	      stub_symbol = lookup_minimal_symbol (SYMBOL_NAME (funsymbol),
-						   NULL, objfile);
-	      /* Found a symbol with the right name.  */
-	      if (stub_symbol)
-		{
-		  struct unwind_table_entry *u;
-		  /* It must be a shared library trampoline.  */
-		  if (MSYMBOL_TYPE (stub_symbol) != mst_solib_trampoline)
-		    continue;
-
-		  /* It must also be an import stub.  */
-		  u = find_unwind_entry (SYMBOL_VALUE (stub_symbol));
-		  if (!u || u->stub_unwind.stub_type != IMPORT)
-		    continue;
-
-		  /* OK.  Looks like the correct import stub.  */
-		  newfun = SYMBOL_VALUE (stub_symbol);
-		  fun = newfun;
-		}
-	    }
-	  if (newfun == 0)
-	    write_register (19, som_solib_get_got_by_pc (fun));
-	}
-#endif /* end of if 0 */
-#endif
-    }
-
-  /* If we are calling an import stub (eg calling into a dynamic library)
-     then have sr4export call the magic __d_plt_call routine which is linked
-     in from end.o.  (You can't use _sr4export to call the import stub as
-     the value in sp-24 will get fried and you end up returning to the
-     wrong location.  You can't call the import stub directly as the code
-     to bind the PLT entry to a function can't return to a stack address.)  */
-
-  /* elz:
-     There does not have to be an import stub to call a routine in a
-     different load module (note: a "load module" is an a.out or a shared
-     library).  If you call a routine indirectly, going through $$dyncall (or
-     $$dyncall_external), you won't go through an import stub.  Import stubs
-     are only used for direct calls to an imported routine.
-
-     What you (wdb) need is to go through $$dyncall with a proper plabel for
-     the imported routine.  shl_findsym() returns you the address of a plabel
-     suitable for use in making an indirect call through, e.g., through
-     $$dyncall.
-     This is taken care below with the call to find_stub_.... */
-#if 0
-  /* elz: this check here is not necessary if we are going to call stuff through
-     plabels only, we just now check whether the function we call is in a shlib */
-  u = find_unwind_entry (fun);
-
-  if (u && u->stub_unwind.stub_type == IMPORT || 
-      (!(u && u->stub_unwind.stub_type == IMPORT) && solib_handle))
-#endif /* 0 */
-  if (solib_handle)
-    {
-      CORE_ADDR new_fun;
-
-      /* Prefer __gcc_plt_call over the HP supplied routine because
-	 __gcc_plt_call works for any number of arguments.  */
-      trampoline = lookup_minimal_symbol ("__gcc_plt_call", NULL, NULL);
-      if (trampoline == NULL)
-	trampoline = lookup_minimal_symbol ("__d_plt_call", NULL, NULL);
-
-      if (trampoline == NULL)
-	{
-	  error ("Can't find an address for __d_plt_call or __gcc_plt_call trampoline\nSuggest linking executable with -g (links in /opt/langtools/lib/end.o)");
-	}
-      /* This is where sr4export will jump to.  */
-      new_fun = SYMBOL_VALUE_ADDRESS (trampoline);
-
-      if (strcmp (SYMBOL_NAME (trampoline), "__d_plt_call") == 0)
-	{
-          /* if the function is in a shared library, but we have no import sub for 
-             it, we need to get the plabel from a call to __d_shl_get, which is a 
-             function in end.o. To call this function we need to set up various things */
-	  
-	  /* actually now we just use the plabel any time we make the call,
-	     because on 10.30 and 11.00 this is the only acceptable way. This also
-	     works fine for 10.20 */
-	  /* if (!(u && u->stub_unwind.stub_type == IMPORT) && solib_handle) */
-            {
-              struct minimal_symbol *fmsymbol = lookup_minimal_symbol_by_pc(fun);
-              
-              new_stub = find_stub_with_shl_get(fmsymbol, solib_handle);
-
-              if (new_stub == NULL) 
-                error("Can't find an import stub for %s", SYMBOL_NAME(fmsymbol)); /* purecov: deadcode */
-            }
-
-	  /* We have to store the address of the stub in __shlib_funcptr.  */
-	    msymbol = lookup_minimal_symbol ("__shlib_funcptr", NULL,
-					     (struct objfile *)NULL);
-	    if (msymbol == NULL)
-	      error ("Can't find an address for __shlib_funcptr"); /* purecov: deadcode */
-
-         /* if (new_stub != NULL) */
-	     target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol), (char *)&new_stub, 4);
-         /* this is no longer used */
-         /* else
-	     target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol), (char *)&fun, 4); */
-
-	  /* We want sr4export to call __d_plt_call, so we claim it is
-	     the final target.  Clear trampoline.  */
-	    fun = new_fun;
-	    trampoline = NULL;
-	}
-    }
-
-  /* Store upper 21 bits of function address into ldil.  fun will either be
-     the final target (most cases) or __d_plt_call when calling into a shared
-     library and __gcc_plt_call is not available.  */
-  store_unsigned_integer
-    (&dummy[FUNC_LDIL_OFFSET],
-     INSTRUCTION_SIZE,
-     deposit_21 (fun >> 11,
-		 extract_unsigned_integer (&dummy[FUNC_LDIL_OFFSET],
-					   INSTRUCTION_SIZE)));
-
-  /* Store lower 11 bits of function address into ldo */
-  store_unsigned_integer
-    (&dummy[FUNC_LDO_OFFSET],
-     INSTRUCTION_SIZE,
-     deposit_14 (fun & MASK_11,
-		 extract_unsigned_integer (&dummy[FUNC_LDO_OFFSET],
-					   INSTRUCTION_SIZE)));
-#ifdef SR4EXPORT_LDIL_OFFSET
-
-  {
-    CORE_ADDR trampoline_addr;
-
-    /* We may still need sr4export's address too.  */
-
-    if (trampoline == NULL)
-      {
-	msymbol = lookup_minimal_symbol ("_sr4export", NULL, NULL);
-	if (msymbol == NULL)
-	  error ("Can't find an address for _sr4export trampoline"); /* purecov: deadcode */
-
-	trampoline_addr = SYMBOL_VALUE_ADDRESS (msymbol);
-      }
-    else
-      trampoline_addr = SYMBOL_VALUE_ADDRESS (trampoline);
-
-
-    /* Store upper 21 bits of trampoline's address into ldil */
-    store_unsigned_integer
-      (&dummy[SR4EXPORT_LDIL_OFFSET],
-       INSTRUCTION_SIZE,
-       deposit_21 (trampoline_addr >> 11,
-		   extract_unsigned_integer (&dummy[SR4EXPORT_LDIL_OFFSET],
-					     INSTRUCTION_SIZE)));
-
-    /* Store lower 11 bits of trampoline's address into ldo */
-    store_unsigned_integer
-      (&dummy[SR4EXPORT_LDO_OFFSET],
-       INSTRUCTION_SIZE,
-       deposit_14 (trampoline_addr & MASK_11,
-		   extract_unsigned_integer (&dummy[SR4EXPORT_LDO_OFFSET],
-					     INSTRUCTION_SIZE)));
-  }
-#endif
-
-  write_register (22, pc);
-
-  /* If we are in a syscall, then we should call the stack dummy
-     directly.  $$dyncall is not needed as the kernel sets up the
-     space id registers properly based on the value in %r31.  In
-     fact calling $$dyncall will not work because the value in %r22
-     will be clobbered on the syscall exit path. 
-
-     Similarly if the current PC is in a shared library.  Note however,
-     this scheme won't work if the shared library isn't mapped into
-     the same space as the stack.  */
-  if (flags & 2)
-    return pc;
-#ifndef GDB_TARGET_IS_PA_ELF
-  else if (som_solib_get_got_by_pc (target_read_pc (inferior_pid)))
-    return pc;
-#endif
-  else
-    return dyncall_addr;
-
-}
-
-
-
-
-/* If the pid is in a syscall, then the FP register is not readable.
-   We'll return zero in that case, rather than attempting to read it
-   and cause a warning. */
-CORE_ADDR
-target_read_fp (pid)
-  int  pid;
-{
-  int flags = read_register (FLAGS_REGNUM);
-
-  if (flags & 2) {
-    return (CORE_ADDR) 0;
-  }
-
-  /* This is the only site that may directly read_register () the FP
-     register.  All others must use TARGET_READ_FP (). */
-  return read_register (FP_REGNUM);
-}
-
-
-/* Get the PC from %r31 if currently in a syscall.  Also mask out privilege
-   bits.  */
-
-CORE_ADDR
-target_read_pc (pid)
-     int pid;
-{
-  int flags = read_register_pid (FLAGS_REGNUM, pid);
-
-  /* The following test does not belong here.  It is OS-specific, and belongs
-     in native code.  */
-  /* Test SS_INSYSCALL */
-  if (flags & 2)
-    return read_register_pid (31, pid) & ~0x3;
-
-  return read_register_pid (PC_REGNUM, pid) & ~0x3;
-}
-
-/* Write out the PC.  If currently in a syscall, then also write the new
-   PC value into %r31.  */
-
-void
-target_write_pc (v, pid)
-     CORE_ADDR v;
-     int pid;
-{
-  int flags = read_register_pid (FLAGS_REGNUM, pid);
-
-  /* The following test does not belong here.  It is OS-specific, and belongs
-     in native code.  */
-  /* If in a syscall, then set %r31.  Also make sure to get the 
-     privilege bits set correctly.  */
-  /* Test SS_INSYSCALL */
-  if (flags & 2)
-    write_register_pid (31, v | 0x3, pid);
-
-  write_register_pid (PC_REGNUM, v, pid);
-  write_register_pid (NPC_REGNUM, v + 4, pid);
-}
-
-/* return the alignment of a type in bytes. Structures have the maximum
-   alignment required by their fields. */
-
-static int
-hppa_alignof (type)
-     struct type *type;
-{
-  int max_align, align, i;
-  CHECK_TYPEDEF (type);
-  switch (TYPE_CODE (type))
-    {
-    case TYPE_CODE_PTR:
-    case TYPE_CODE_INT:
-    case TYPE_CODE_FLT:
-      return TYPE_LENGTH (type);
-    case TYPE_CODE_ARRAY:
-      return hppa_alignof (TYPE_FIELD_TYPE (type, 0));
-    case TYPE_CODE_STRUCT:
-    case TYPE_CODE_UNION:
-      max_align = 1;
-      for (i = 0; i < TYPE_NFIELDS (type); i++)
-	{
-	  /* Bit fields have no real alignment. */
-	  /* if (!TYPE_FIELD_BITPOS (type, i)) */
-	  if (!TYPE_FIELD_BITSIZE (type, i)) /* elz: this should be bitsize */
-	    {
-	      align = hppa_alignof (TYPE_FIELD_TYPE (type, i));
-	      max_align = max (max_align, align);
-	    }
-	}
-      return max_align;
-    default:
-      return 4;
-    }
-}
-
-/* Print the register regnum, or all registers if regnum is -1 */
-
-void
-pa_do_registers_info (regnum, fpregs)
-     int regnum;
-     int fpregs;
-{
-  char raw_regs [REGISTER_BYTES];
-  int i;
-
-  /* Make a copy of gdb's save area (may cause actual
-     reads from the target). */
-  for (i = 0; i < NUM_REGS; i++)
-    read_relative_register_raw_bytes (i, raw_regs + REGISTER_BYTE (i));
-
-  if (regnum == -1)
-    pa_print_registers (raw_regs, regnum, fpregs);
-  else if (regnum < FP4_REGNUM) {
-    long reg_val[2];
-      
-    /* Why is the value not passed through "extract_signed_integer"
-       as in "pa_print_registers" below? */
-    pa_register_look_aside(raw_regs, regnum, &reg_val[0]);
-
-    if(!is_pa_2) {
-      printf_unfiltered ("%s %x\n", REGISTER_NAME (regnum), reg_val[1]);
-    }
-    else {
-      /* Fancy % formats to prevent leading zeros. */
-      if(reg_val[0] == 0)
-	printf_unfiltered("%s %x\n", REGISTER_NAME (regnum), reg_val[1]);
-      else
-	printf_unfiltered("%s %x%8.8x\n", REGISTER_NAME (regnum),
-			   reg_val[0], reg_val[1]);        
-    }
-  }
-  else
-      /* Note that real floating point values only start at
-         FP4_REGNUM.  FP0 and up are just status and error
-         registers, which have integral (bit) values. */
-    pa_print_fp_reg (regnum);
-}
-
-/********** new function ********************/
-void
-pa_do_strcat_registers_info (regnum, fpregs, stream, precision)
-     int regnum;
-     int fpregs;
-     GDB_FILE *stream;
-     enum precision_type precision;
-{
-  char raw_regs [REGISTER_BYTES];
-  int i;
-
-  /* Make a copy of gdb's save area (may cause actual
-     reads from the target). */  
-  for (i = 0; i < NUM_REGS; i++)
-    read_relative_register_raw_bytes (i, raw_regs + REGISTER_BYTE (i));
-
-  if (regnum == -1)
-    pa_strcat_registers (raw_regs, regnum, fpregs, stream);
-
-  else if (regnum < FP4_REGNUM) {
-    long reg_val[2];
-      
-    /* Why is the value not passed through "extract_signed_integer"
-       as in "pa_print_registers" below? */
-    pa_register_look_aside(raw_regs, regnum, &reg_val[0]);
-
-    if(!is_pa_2) {
-      fprintf_unfiltered (stream, "%s %x", REGISTER_NAME (regnum), reg_val[1]);
-    }
-    else {
-      /* Fancy % formats to prevent leading zeros. */
-      if(reg_val[0] == 0)
-	fprintf_unfiltered(stream, "%s %x", REGISTER_NAME (regnum),
-			   reg_val[1]);
-      else
-	fprintf_unfiltered(stream, "%s %x%8.8x", REGISTER_NAME (regnum),
-			   reg_val[0], reg_val[1]);        
-    }
-  }
-  else
-      /* Note that real floating point values only start at
-         FP4_REGNUM.  FP0 and up are just status and error
-         registers, which have integral (bit) values. */
-    pa_strcat_fp_reg (regnum, stream, precision);
-}
-
-/* If this is a PA2.0 machine, fetch the real 64-bit register
-   value.  Otherwise use the info from gdb's saved register area.
-
-   Note that reg_val is really expected to be an array of longs,
-   with two elements. */
-static void
-pa_register_look_aside(raw_regs, regnum, raw_val)
-     char *raw_regs;
-     int   regnum;
-     long *raw_val;
-{
-  static int know_which = 0;  /* False */
-
-  int          regaddr;
-  unsigned int offset;
-  register int i;
-  int          start;
-  
-  
-  char buf[MAX_REGISTER_RAW_SIZE];
-  long long reg_val;
-
-  if(!know_which) {
-     if(CPU_PA_RISC2_0 == sysconf(_SC_CPU_VERSION)) {
-        is_pa_2 = (1==1);
-     }
-     
-     know_which = 1;  /* True */
-  }
-
-  raw_val[0] = 0;
-  raw_val[1] = 0;
-
-  if(!is_pa_2) {
-      raw_val[1] = *(long *)(raw_regs + REGISTER_BYTE(regnum));
-      return;
-  }
-
-  /* Code below copied from hppah-nat.c, with fixes for wide
-     registers, using different area of save_state, etc. */
-  if(regnum == FLAGS_REGNUM || regnum >= FP0_REGNUM) {
-      /* Use narrow regs area of save_state and default macro. */
-      offset  = U_REGS_OFFSET;
-      regaddr = register_addr(regnum, offset);
-      start   = 1;
-  }
-  else {
-      /* Use wide regs area, and calculate registers as 8 bytes wide.
-
-         We'd like to do this, but current version of "C" doesn't
-         permit "offsetof":
-
-            offset  = offsetof(save_state_t, ss_wide);
-
-         Note that to avoid "C" doing typed pointer arithmetic, we
-         have to cast away the type in our offset calculation:
-         otherwise we get an offset of 1! */
-      save_state_t temp;
-      offset = ((int) &temp.ss_wide) - ((int) &temp);
-      regaddr = offset + regnum * 8;
-      start   = 0;
-  }
-   
-  for(i = start; i < 2; i++)
-    {
-      errno = 0;
-      raw_val[i] = call_ptrace (PT_RUREGS, inferior_pid,
-  	 	                (PTRACE_ARG3_TYPE) regaddr, 0);
-      if (errno != 0)
-	{
-	  /* Warning, not error, in case we are attached; sometimes the
-	     kernel doesn't let us at the registers.  */
-	  char *err = safe_strerror (errno);
-	  char *msg = alloca (strlen (err) + 128);
-	  sprintf (msg, "reading register %s: %s", REGISTER_NAME (regnum), err);
-	  warning (msg);
-	  goto error_exit;
-	}
-
-      regaddr += sizeof (long);
-    }
-    
-  if (regnum == PCOQ_HEAD_REGNUM || regnum == PCOQ_TAIL_REGNUM)
-    raw_val[1] &= ~0x3; /* I think we're masking out space bits */
-
-error_exit:
-  ;
-}
-
-/* "Info all-reg" command */
-                                                    
-static void
-pa_print_registers (raw_regs, regnum, fpregs)
-     char *raw_regs;
-     int regnum;
-     int fpregs;
-{
-  int i,j;
-  long raw_val[2];   /* Alas, we are compiled so that "long long" is 32 bits */
-  long long_val;
-
-  for (i = 0; i < 18; i++)
-    {
-      for (j = 0; j < 4; j++)
-	{
-          /* Q: Why is the value passed through "extract_signed_integer",
-	        while above, in "pa_do_registers_info" it isn't?
-             A: ? */
-	  pa_register_look_aside(raw_regs, i+(j*18), &raw_val[0]);
-
-          /* Even fancier % formats to prevent leading zeros
-             and still maintain the output in columns. */
-          if(!is_pa_2) {
-              /* Being big-endian, on this machine the low bits
-                 (the ones we want to look at) are in the second longword. */
-   	      long_val = extract_signed_integer (&raw_val[1], 4);
-  	      printf_filtered ("%8.8s: %8x  ",
-			       REGISTER_NAME (i+(j*18)), long_val);
-	  }
-          else {
-   	      /* raw_val = extract_signed_integer(&raw_val, 8); */
-              if(raw_val[0] == 0)
-  	          printf_filtered("%8.8s:         %8x  ",
-				  REGISTER_NAME (i+(j*18)), raw_val[1]);
-              else
-  	          printf_filtered("%8.8s: %8x%8.8x  ", REGISTER_NAME (i+(j*18)),
-				  raw_val[0], raw_val[1]);
-          }
-	}
-      printf_unfiltered ("\n");
-    }
-  
-  if (fpregs)
-  for (i = FP4_REGNUM; i < NUM_REGS; i++)  /* FP4_REGNUM == 72 */
-      pa_print_fp_reg (i);
-}
-
-/************* new function ******************/                                                    
-static void
-pa_strcat_registers (raw_regs, regnum, fpregs, stream)
-     char *raw_regs;
-     int regnum;
-     int fpregs;
-     GDB_FILE *stream;
-{
-  int i,j;
-  long raw_val[2];   /* Alas, we are compiled so that "long long" is 32 bits */
-  long long_val;
-  enum precision_type precision;
-
-  precision = unspecified_precision;
-
-  for (i = 0; i < 18; i++)
-    {
-      for (j = 0; j < 4; j++)
-	{
-          /* Q: Why is the value passed through "extract_signed_integer",
-                while above, in "pa_do_registers_info" it isn't?
-             A: ? */
-	  pa_register_look_aside(raw_regs, i+(j*18), &raw_val[0]);
-
-          /* Even fancier % formats to prevent leading zeros
-             and still maintain the output in columns. */
-          if(!is_pa_2) {
-              /* Being big-endian, on this machine the low bits
-                 (the ones we want to look at) are in the second longword. */
-   	      long_val = extract_signed_integer(&raw_val[1], 4);
-  	      fprintf_filtered (stream, "%8.8s: %8x  ", REGISTER_NAME (i+(j*18)), long_val);
-	  }
-          else {
-   	      /* raw_val = extract_signed_integer(&raw_val, 8); */
-              if(raw_val[0] == 0)
-  	          fprintf_filtered(stream, "%8.8s:         %8x  ", REGISTER_NAME (i+(j*18)),
-                                   raw_val[1]);
-              else
-  	          fprintf_filtered(stream, "%8.8s: %8x%8.8x  ", REGISTER_NAME (i+(j*18)),
-                                    raw_val[0], raw_val[1]);
-          }
-	}
-      fprintf_unfiltered (stream, "\n");
-    }
-  
-  if (fpregs)
-  for (i = FP4_REGNUM; i < NUM_REGS; i++)  /* FP4_REGNUM == 72 */
-      pa_strcat_fp_reg (i, stream, precision);
-}
-
-static void
-pa_print_fp_reg (i)
-     int i;
-{
-  char raw_buffer[MAX_REGISTER_RAW_SIZE];
-  char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
-
-  /* Get 32bits of data.  */
-  read_relative_register_raw_bytes (i, raw_buffer);
-
-  /* Put it in the buffer.  No conversions are ever necessary.  */
-  memcpy (virtual_buffer, raw_buffer, REGISTER_RAW_SIZE (i));
-
-  fputs_filtered (REGISTER_NAME (i), gdb_stdout);
-  print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), gdb_stdout);
-  fputs_filtered ("(single precision)     ", gdb_stdout);
-
-  val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, gdb_stdout, 0,
-	     1, 0, Val_pretty_default);
-  printf_filtered ("\n");
-
-  /* If "i" is even, then this register can also be a double-precision
-     FP register.  Dump it out as such.  */
-  if ((i % 2) == 0)
-    {
-      /* Get the data in raw format for the 2nd half.  */
-      read_relative_register_raw_bytes (i + 1, raw_buffer);
-
-      /* Copy it into the appropriate part of the virtual buffer.  */
-      memcpy (virtual_buffer + REGISTER_RAW_SIZE (i), raw_buffer,
-	      REGISTER_RAW_SIZE (i));
-
-      /* Dump it as a double.  */
-      fputs_filtered (REGISTER_NAME (i), gdb_stdout);
-      print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), gdb_stdout);
-      fputs_filtered ("(double precision)     ", gdb_stdout);
-
-      val_print (builtin_type_double, virtual_buffer, 0, 0, gdb_stdout, 0,
-		 1, 0, Val_pretty_default);
-      printf_filtered ("\n");
-    }
-}
-
-/*************** new function ***********************/
-static void
-pa_strcat_fp_reg (i, stream, precision)
-     int i;
-     GDB_FILE *stream;
-     enum precision_type precision;
-{
-  char raw_buffer[MAX_REGISTER_RAW_SIZE];
-  char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
-
-  fputs_filtered (REGISTER_NAME (i), stream);
-  print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), stream);
-
-  /* Get 32bits of data.  */
-  read_relative_register_raw_bytes (i, raw_buffer);
-
-  /* Put it in the buffer.  No conversions are ever necessary.  */
-  memcpy (virtual_buffer, raw_buffer, REGISTER_RAW_SIZE (i));
-
-  if (precision == double_precision && (i % 2) == 0)
-    {
-
-    char raw_buf[MAX_REGISTER_RAW_SIZE];
- 
-    /* Get the data in raw format for the 2nd half.  */
-    read_relative_register_raw_bytes (i + 1, raw_buf);
- 
-    /* Copy it into the appropriate part of the virtual buffer.  */
-    memcpy (virtual_buffer + REGISTER_RAW_SIZE(i), raw_buf, REGISTER_RAW_SIZE (i));
-
-    val_print (builtin_type_double, virtual_buffer, 0, 0 , stream, 0, 
-               1, 0, Val_pretty_default);
-
-    }
-  else { 
-    val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, stream, 0,
-	       1, 0, Val_pretty_default);
-  }
-
-}
-
-/* Return one if PC is in the call path of a trampoline, else return zero.
-
-   Note we return one for *any* call trampoline (long-call, arg-reloc), not
-   just shared library trampolines (import, export).  */
-
-int
-in_solib_call_trampoline (pc, name)
-     CORE_ADDR pc;
-     char *name;
-{
-  struct minimal_symbol *minsym;
-  struct unwind_table_entry *u;
-  static CORE_ADDR dyncall = 0;
-  static CORE_ADDR sr4export = 0;
-
-/* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
-   new exec file */
-
-  /* First see if PC is in one of the two C-library trampolines.  */
-  if (!dyncall)
-    {
-      minsym = lookup_minimal_symbol ("$$dyncall", NULL, NULL);
-      if (minsym)
-	dyncall = SYMBOL_VALUE_ADDRESS (minsym);
-      else
-	dyncall = -1;
-    }
-
-  if (!sr4export)
-    {
-      minsym = lookup_minimal_symbol ("_sr4export", NULL, NULL);
-      if (minsym)
-	sr4export = SYMBOL_VALUE_ADDRESS (minsym);
-      else
-	sr4export = -1;
-    }
-
-  if (pc == dyncall || pc == sr4export)
-    return 1;
-
-  /* Get the unwind descriptor corresponding to PC, return zero
-     if no unwind was found.  */
-  u = find_unwind_entry (pc);
-  if (!u)
-    return 0;
-
-  /* If this isn't a linker stub, then return now.  */
-  if (u->stub_unwind.stub_type == 0)
-    return 0;
-
-  /* By definition a long-branch stub is a call stub.  */
-  if (u->stub_unwind.stub_type == LONG_BRANCH)
-    return 1;
-
-  /* The call and return path execute the same instructions within
-     an IMPORT stub!  So an IMPORT stub is both a call and return
-     trampoline.  */
-  if (u->stub_unwind.stub_type == IMPORT)
-    return 1;
-
-  /* Parameter relocation stubs always have a call path and may have a
-     return path.  */
-  if (u->stub_unwind.stub_type == PARAMETER_RELOCATION
-      || u->stub_unwind.stub_type == EXPORT)
-    {
-      CORE_ADDR addr;
-
-      /* Search forward from the current PC until we hit a branch
-	 or the end of the stub.  */
-      for (addr = pc; addr <= u->region_end; addr += 4)
-	{
-	  unsigned long insn;
-
-	  insn = read_memory_integer (addr, 4);
-
-	  /* Does it look like a bl?  If so then it's the call path, if
-	     we find a bv or be first, then we're on the return path.  */
-	  if ((insn & 0xfc00e000) == 0xe8000000)
-	    return 1;
-	  else if ((insn & 0xfc00e001) == 0xe800c000
-		   || (insn & 0xfc000000) == 0xe0000000)
-	    return 0;
-	}
-
-      /* Should never happen.  */
-      warning ("Unable to find branch in parameter relocation stub.\n"); /* purecov: deadcode */
-      return 0; /* purecov: deadcode */
-    }
-
-  /* Unknown stub type.  For now, just return zero.  */
-  return 0; /* purecov: deadcode */
-}
-
-/* Return one if PC is in the return path of a trampoline, else return zero.
-
-   Note we return one for *any* call trampoline (long-call, arg-reloc), not
-   just shared library trampolines (import, export).  */
-
-int
-in_solib_return_trampoline (pc, name)
-     CORE_ADDR pc;
-     char *name;
-{
-  struct unwind_table_entry *u;
-
-  /* Get the unwind descriptor corresponding to PC, return zero
-     if no unwind was found.  */
-  u = find_unwind_entry (pc);
-  if (!u)
-    return 0;
-
-  /* If this isn't a linker stub or it's just a long branch stub, then
-     return zero.  */
-  if (u->stub_unwind.stub_type == 0 || u->stub_unwind.stub_type == LONG_BRANCH)
-    return 0;
-
-  /* The call and return path execute the same instructions within
-     an IMPORT stub!  So an IMPORT stub is both a call and return
-     trampoline.  */
-  if (u->stub_unwind.stub_type == IMPORT)
-    return 1;
-
-  /* Parameter relocation stubs always have a call path and may have a
-     return path.  */
-  if (u->stub_unwind.stub_type == PARAMETER_RELOCATION
-      || u->stub_unwind.stub_type == EXPORT)
-    {
-      CORE_ADDR addr;
-
-      /* Search forward from the current PC until we hit a branch
-	 or the end of the stub.  */
-      for (addr = pc; addr <= u->region_end; addr += 4)
-	{
-	  unsigned long insn;
-
-	  insn = read_memory_integer (addr, 4);
-
-	  /* Does it look like a bl?  If so then it's the call path, if
-	     we find a bv or be first, then we're on the return path.  */
-	  if ((insn & 0xfc00e000) == 0xe8000000)
-	    return 0;
-	  else if ((insn & 0xfc00e001) == 0xe800c000
-		   || (insn & 0xfc000000) == 0xe0000000)
-	    return 1;
-	}
-
-      /* Should never happen.  */
-      warning ("Unable to find branch in parameter relocation stub.\n"); /* purecov: deadcode */
-      return 0; /* purecov: deadcode */
-    }
-
-  /* Unknown stub type.  For now, just return zero.  */
-  return 0; /* purecov: deadcode */
-
-}
-
-/* Figure out if PC is in a trampoline, and if so find out where
-   the trampoline will jump to.  If not in a trampoline, return zero.
-
-   Simple code examination probably is not a good idea since the code
-   sequences in trampolines can also appear in user code.
-
-   We use unwinds and information from the minimal symbol table to
-   determine when we're in a trampoline.  This won't work for ELF
-   (yet) since it doesn't create stub unwind entries.  Whether or
-   not ELF will create stub unwinds or normal unwinds for linker
-   stubs is still being debated.
-
-   This should handle simple calls through dyncall or sr4export,
-   long calls, argument relocation stubs, and dyncall/sr4export
-   calling an argument relocation stub.  It even handles some stubs
-   used in dynamic executables.  */
-
-# if 0
-CORE_ADDR
-skip_trampoline_code (pc, name)
-     CORE_ADDR pc;
-     char *name;
-{
-  return find_solib_trampoline_target(pc);
-}
-
-#endif
-
-CORE_ADDR
-skip_trampoline_code (pc, name)
-     CORE_ADDR pc;
-     char *name;
-{
-  long orig_pc = pc;
-  long prev_inst, curr_inst, loc;
-  static CORE_ADDR dyncall = 0;
-  static CORE_ADDR dyncall_external = 0;
-  static CORE_ADDR sr4export = 0;
-  struct minimal_symbol *msym;
-  struct unwind_table_entry *u;
-
-
-/* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
-   new exec file */
-
-  if (!dyncall)
-    {
-      msym = lookup_minimal_symbol ("$$dyncall", NULL, NULL);
-      if (msym)
-	dyncall = SYMBOL_VALUE_ADDRESS (msym);
-      else
-	dyncall = -1;
-    }
-
-  if (!dyncall_external)
-    {
-      msym = lookup_minimal_symbol ("$$dyncall_external", NULL, NULL);
-      if (msym)
-	dyncall_external = SYMBOL_VALUE_ADDRESS (msym);
-      else
-	dyncall_external = -1;
-    }
-
-  if (!sr4export)
-    {
-      msym = lookup_minimal_symbol ("_sr4export", NULL, NULL);
-      if (msym)
-	sr4export = SYMBOL_VALUE_ADDRESS (msym);
-      else
-	sr4export = -1;
-    }
-
-  /* Addresses passed to dyncall may *NOT* be the actual address
-     of the function.  So we may have to do something special.  */
-  if (pc == dyncall)
-    {
-      pc = (CORE_ADDR) read_register (22);
-
-      /* If bit 30 (counting from the left) is on, then pc is the address of
-	 the PLT entry for this function, not the address of the function
-	 itself.  Bit 31 has meaning too, but only for MPE.  */
-      if (pc & 0x2)
-	pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, 4);
-    }
-  if (pc == dyncall_external)
-    {
-      pc = (CORE_ADDR) read_register (22);
-      pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, 4);
-    }
-  else if (pc == sr4export)
-    pc = (CORE_ADDR) (read_register (22));
-
-  /* Get the unwind descriptor corresponding to PC, return zero
-     if no unwind was found.  */
-  u = find_unwind_entry (pc);
-  if (!u)
-    return 0;
-
-  /* If this isn't a linker stub, then return now.  */
-  /* elz: attention here! (FIXME) because of a compiler/linker 
-     error, some stubs which should have a non zero stub_unwind.stub_type 
-     have unfortunately a value of zero. So this function would return here
-     as if we were not in a trampoline. To fix this, we go look at the partial
-     symbol information, which reports this guy as a stub.
-     (FIXME): Unfortunately, we are not that lucky: it turns out that the 
-     partial symbol information is also wrong sometimes. This is because 
-     when it is entered (somread.c::som_symtab_read()) it can happen that
-     if the type of the symbol (from the som) is Entry, and the symbol is
-     in a shared library, then it can also be a trampoline.  This would
-     be OK, except that I believe the way they decide if we are ina shared library
-     does not work. SOOOO..., even if we have a regular function w/o trampolines
-     its minimal symbol can be assigned type mst_solib_trampoline.
-     Also, if we find that the symbol is a real stub, then we fix the unwind
-     descriptor, and define the stub type to be EXPORT.
-     Hopefully this is correct most of the times. */ 
-  if (u->stub_unwind.stub_type == 0)
-  {
-
-/* elz: NOTE (FIXME!) once the problem with the unwind information is fixed
-   we can delete all the code which appears between the lines */
-/*--------------------------------------------------------------------------*/
-    msym = lookup_minimal_symbol_by_pc (pc);
-
-    if (msym == NULL || MSYMBOL_TYPE (msym) != mst_solib_trampoline)
-      return orig_pc == pc ? 0 : pc & ~0x3;
-
-    else if (msym != NULL && MSYMBOL_TYPE (msym) == mst_solib_trampoline)
-         {
-          struct objfile *objfile;
-          struct minimal_symbol *msymbol;
-          int function_found = 0;
-
-             /* go look if there is another minimal symbol with the same name as 
-                this one, but with type mst_text. This would happen if the msym
-                is an actual trampoline, in which case there would be another
-                symbol with the same name corresponding to the real function */
-
-             ALL_MSYMBOLS (objfile, msymbol)
-             {
-               if (MSYMBOL_TYPE (msymbol) == mst_text
-                    && STREQ (SYMBOL_NAME (msymbol) , SYMBOL_NAME (msym)))
-                 {
-                  function_found = 1;
-                  break;
-                 }
-             }
-
-            if (function_found)  
-                   /* the type of msym is correct (mst_solib_trampoline), but
-                      the unwind info is wrong, so set it to the correct value */
-                u->stub_unwind.stub_type = EXPORT;
-            else
-                   /* the stub type info in the unwind is correct (this is not a
-                      trampoline), but the msym type information is wrong, it
-                      should be mst_text. So we need to fix the msym, and also
-                      get out of this function */
-              {
-                  MSYMBOL_TYPE (msym) = mst_text;
-                  return orig_pc == pc ? 0 : pc & ~0x3;
-              }
-         }
-               
-/*--------------------------------------------------------------------------*/
-  }
-
-  /* It's a stub.  Search for a branch and figure out where it goes.
-     Note we have to handle multi insn branch sequences like ldil;ble.
-     Most (all?) other branches can be determined by examining the contents
-     of certain registers and the stack.  */
-
-  loc = pc;
-  curr_inst = 0;
-  prev_inst = 0;
-  while (1)
-    {
-      /* Make sure we haven't walked outside the range of this stub.  */
-      if (u != find_unwind_entry (loc))
-	{
-	  warning ("Unable to find branch in linker stub");
-	  return orig_pc == pc ? 0 : pc & ~0x3;
-	}
-
-      prev_inst = curr_inst;
-      curr_inst = read_memory_integer (loc, 4);
-
-      /* Does it look like a branch external using %r1?  Then it's the
-	 branch from the stub to the actual function.  */
-      if ((curr_inst & 0xffe0e000) == 0xe0202000)
-	{
-	  /* Yup.  See if the previous instruction loaded
-	     a value into %r1.  If so compute and return the jump address.  */
-	  if ((prev_inst & 0xffe00000) == 0x20200000)
-	    return (extract_21 (prev_inst) + extract_17 (curr_inst)) & ~0x3;
-	  else
-	    {
-	      warning ("Unable to find ldil X,%%r1 before ble Y(%%sr4,%%r1).");
-	      return orig_pc == pc ? 0 : pc & ~0x3;
-	    }
-	}
-
-      /* Does it look like a be 0(sr0,%r21)? OR 
-         Does it look like a be, n 0(sr0,%r21)? OR 
-         Does it look like a bve (r21)? (this is on PA2.0)
-         Does it look like a bve, n(r21)? (this is also on PA2.0)
-         That's the branch from an
-	 import stub to an export stub.
-
-	 It is impossible to determine the target of the branch via
-	 simple examination of instructions and/or data (consider
-	 that the address in the plabel may be the address of the
-	 bind-on-reference routine in the dynamic loader).
-
-	 So we have try an alternative approach.
-
-	 Get the name of the symbol at our current location; it should
-	 be a stub symbol with the same name as the symbol in the
-	 shared library.
-
-	 Then lookup a minimal symbol with the same name; we should
-	 get the minimal symbol for the target routine in the shared
-	 library as those take precedence of import/export stubs.  */
-      if ((curr_inst == 0xe2a00000) ||
-          (curr_inst == 0xe2a00002) ||
-          (curr_inst == 0xeaa0d000) ||
-          (curr_inst == 0xeaa0d002))
-	{
-	  struct minimal_symbol *stubsym, *libsym;
-
-	  stubsym = lookup_minimal_symbol_by_pc (loc);
-	  if (stubsym == NULL)
-	    {
-	      warning ("Unable to find symbol for 0x%x", loc);
-	      return orig_pc == pc ? 0 : pc & ~0x3;
-	    }
-
-	  libsym = lookup_minimal_symbol (SYMBOL_NAME (stubsym), NULL, NULL);
-	  if (libsym == NULL)
-	    {
-	      warning ("Unable to find library symbol for %s\n",
-		       SYMBOL_NAME (stubsym));
-	      return orig_pc == pc ? 0 : pc & ~0x3;
-	    }
-
-	  return SYMBOL_VALUE (libsym);
-	}
-
-      /* Does it look like bl X,%rp or bl X,%r0?  Another way to do a
-	 branch from the stub to the actual function.  */
-      /*elz*/
-      else if ((curr_inst & 0xffe0e000) == 0xe8400000
-	       || (curr_inst & 0xffe0e000) == 0xe8000000
-               || (curr_inst & 0xffe0e000) == 0xe800A000)
-	return (loc + extract_17 (curr_inst) + 8) & ~0x3;
-
-      /* Does it look like bv (rp)?   Note this depends on the
-	 current stack pointer being the same as the stack
-	 pointer in the stub itself!  This is a branch on from the
-	 stub back to the original caller.  */
-      /*else if ((curr_inst & 0xffe0e000) == 0xe840c000)*/
-      else if ((curr_inst & 0xffe0f000) == 0xe840c000)
-	{
-	  /* Yup.  See if the previous instruction loaded
-	     rp from sp - 8.  */
-	  if (prev_inst == 0x4bc23ff1)
-	    return (read_memory_integer
-		    (read_register (SP_REGNUM) - 8, 4)) & ~0x3;
-	  else
-	    {
-	      warning ("Unable to find restore of %%rp before bv (%%rp).");
-	      return orig_pc == pc ? 0 : pc & ~0x3;
-	    }
-	}
-
-      /* elz: added this case to capture the new instruction
-         at the end of the return part of an export stub used by
-         the PA2.0: BVE, n (rp) */
-      else if ((curr_inst & 0xffe0f000) == 0xe840d000)
-	{
-	  return (read_memory_integer 
-		  (read_register (SP_REGNUM) - 24, 4)) & ~0x3;
-	}
-
-      /* What about be,n 0(sr0,%rp)?  It's just another way we return to
-	 the original caller from the stub.  Used in dynamic executables.  */
-      else if (curr_inst == 0xe0400002)
-	{
-	  /* The value we jump to is sitting in sp - 24.  But that's
-	     loaded several instructions before the be instruction.
-	     I guess we could check for the previous instruction being
-	     mtsp %r1,%sr0 if we want to do sanity checking.  */
-	  return (read_memory_integer 
-		  (read_register (SP_REGNUM) - 24, 4)) & ~0x3;
-	}
-
-      /* Haven't found the branch yet, but we're still in the stub.
-	 Keep looking.  */
-      loc += 4;
-    }
-}
-
-
-/* For the given instruction (INST), return any adjustment it makes
-   to the stack pointer or zero for no adjustment. 
-
-   This only handles instructions commonly found in prologues.  */
-
-static int
-prologue_inst_adjust_sp (inst)
-     unsigned long inst;
-{
-  /* This must persist across calls.  */
-  static int save_high21;
-
-  /* The most common way to perform a stack adjustment ldo X(sp),sp */
-  if ((inst & 0xffffc000) == 0x37de0000)
-    return extract_14 (inst);
-
-  /* stwm X,D(sp) */
-  if ((inst & 0xffe00000) == 0x6fc00000)
-    return extract_14 (inst);
-
-  /* addil high21,%r1; ldo low11,(%r1),%r30)
-     save high bits in save_high21 for later use.  */
-  if ((inst & 0xffe00000) == 0x28200000)
-    {
-      save_high21 = extract_21 (inst);
-      return 0;
-    }
-
-  if ((inst & 0xffff0000) == 0x343e0000)
-    return save_high21 + extract_14 (inst);
-
-  /* fstws as used by the HP compilers.  */
-  if ((inst & 0xffffffe0) == 0x2fd01220)
-    return extract_5_load (inst);
-
-  /* No adjustment.  */
-  return 0;
-}
-
-/* Return nonzero if INST is a branch of some kind, else return zero.  */
-
-static int
-is_branch (inst)
-     unsigned long inst;
-{
-  switch (inst >> 26)
-    {
-    case 0x20:
-    case 0x21:
-    case 0x22:
-    case 0x23:
-    case 0x28:
-    case 0x29:
-    case 0x2a:
-    case 0x2b:
-    case 0x30:
-    case 0x31:
-    case 0x32:
-    case 0x33:
-    case 0x38:
-    case 0x39:
-    case 0x3a:
-      return 1;
-
-    default:
-      return 0;
-    }
-}
-
-/* Return the register number for a GR which is saved by INST or
-   zero it INST does not save a GR.  */
-
-static int
-inst_saves_gr (inst)
-     unsigned long inst;
-{
-  /* Does it look like a stw?  */
-  if ((inst >> 26) == 0x1a)
-    return extract_5R_store (inst);
-
-  /* Does it look like a stwm?  GCC & HPC may use this in prologues. */
-  if ((inst >> 26) == 0x1b)
-    return extract_5R_store (inst);
-
-  /* Does it look like sth or stb?  HPC versions 9.0 and later use these
-     too.  */
-  if ((inst >> 26) == 0x19 || (inst >> 26) == 0x18)
-    return extract_5R_store (inst);
-      
-  return 0;
-}
-
-/* Return the register number for a FR which is saved by INST or
-   zero it INST does not save a FR.
-
-   Note we only care about full 64bit register stores (that's the only
-   kind of stores the prologue will use).
-
-   FIXME: What about argument stores with the HP compiler in ANSI mode? */
-
-static int
-inst_saves_fr (inst)
-     unsigned long inst;
-{
-  /* is this an FSTDS ?*/
-  if ((inst & 0xfc00dfc0) == 0x2c001200)
-    return extract_5r_store (inst);
-  /* is this an FSTWS ?*/
-  if ((inst & 0xfc00df80) == 0x24001200)
-    return extract_5r_store (inst);
-  return 0;
-}
-
-/* Advance PC across any function entry prologue instructions
-   to reach some "real" code. 
-
-   Use information in the unwind table to determine what exactly should
-   be in the prologue.  */
-
-
-CORE_ADDR
-skip_prologue_hard_way (pc)
-     CORE_ADDR pc;
-{
-  char buf[4];
-  CORE_ADDR orig_pc = pc;
-  unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp;
-  unsigned long args_stored, status, i, restart_gr, restart_fr;
-  struct unwind_table_entry *u;
-
-  restart_gr = 0;
-  restart_fr = 0;
-
-restart:
-  u = find_unwind_entry (pc);
-  if (!u)
-    return pc;
-
-  /* If we are not at the beginning of a function, then return now. */ 
-  if ((pc & ~0x3) != u->region_start)
-    return pc;
-
-  /* This is how much of a frame adjustment we need to account for.  */
-  stack_remaining = u->Total_frame_size << 3;
-
-  /* Magic register saves we want to know about.  */
-  save_rp = u->Save_RP;
-  save_sp = u->Save_SP;
-
-  /* An indication that args may be stored into the stack.  Unfortunately
-     the HPUX compilers tend to set this in cases where no args were
-     stored too!.  */
-  args_stored = 1;
-
-  /* Turn the Entry_GR field into a bitmask.  */
-  save_gr = 0;
-  for (i = 3; i < u->Entry_GR + 3; i++)
-    {
-      /* Frame pointer gets saved into a special location.  */
-      if (u->Save_SP && i == FP_REGNUM)
-	continue;
-
-      save_gr |= (1 << i);
-    }
-  save_gr &= ~restart_gr;
-
-  /* Turn the Entry_FR field into a bitmask too.  */
-  save_fr = 0;
-  for (i = 12; i < u->Entry_FR + 12; i++)
-    save_fr |= (1 << i);
-  save_fr &= ~restart_fr;
-
-  /* Loop until we find everything of interest or hit a branch.
-
-     For unoptimized GCC code and for any HP CC code this will never ever
-     examine any user instructions.
-
-     For optimzied GCC code we're faced with problems.  GCC will schedule
-     its prologue and make prologue instructions available for delay slot
-     filling.  The end result is user code gets mixed in with the prologue
-     and a prologue instruction may be in the delay slot of the first branch
-     or call.
-
-     Some unexpected things are expected with debugging optimized code, so
-     we allow this routine to walk past user instructions in optimized
-     GCC code.  */
-  while (save_gr || save_fr || save_rp || save_sp || stack_remaining > 0
-	 || args_stored)
-    {
-      unsigned int reg_num;
-      unsigned long old_stack_remaining, old_save_gr, old_save_fr;
-      unsigned long old_save_rp, old_save_sp, next_inst;
-
-      /* Save copies of all the triggers so we can compare them later
-	 (only for HPC).  */
-      old_save_gr = save_gr;
-      old_save_fr = save_fr;
-      old_save_rp = save_rp;
-      old_save_sp = save_sp;
-      old_stack_remaining = stack_remaining;
-
-      status = target_read_memory (pc, buf, 4);
-      inst = extract_unsigned_integer (buf, 4);
-       
-      /* Yow! */
-      if (status != 0)
-	return pc;
-
-      /* Note the interesting effects of this instruction.  */
-      stack_remaining -= prologue_inst_adjust_sp (inst);
-
-      /* There is only one instruction used for saving RP into the stack.  */
-      if (inst == 0x6bc23fd9)
-	save_rp = 0;
-
-      /* This is the only way we save SP into the stack.  At this time
-	 the HP compilers never bother to save SP into the stack.  */
-      if ((inst & 0xffffc000) == 0x6fc10000)
-	save_sp = 0;
-
-      /* Account for general and floating-point register saves.  */
-      reg_num = inst_saves_gr (inst);
-      save_gr &= ~(1 << reg_num);
-
-      /* Ugh.  Also account for argument stores into the stack.
-	 Unfortunately args_stored only tells us that some arguments
-	 where stored into the stack.  Not how many or what kind!
-
-	 This is a kludge as on the HP compiler sets this bit and it
-	 never does prologue scheduling.  So once we see one, skip past
-	 all of them.   We have similar code for the fp arg stores below.
-
-	 FIXME.  Can still die if we have a mix of GR and FR argument
-	 stores!  */
-      if (reg_num >= 23 && reg_num <= 26)
-	{
-	  while (reg_num >= 23 && reg_num <= 26)
-	    {
-	      pc += 4;
-	      status = target_read_memory (pc, buf, 4);
-	      inst = extract_unsigned_integer (buf, 4);
-	      if (status != 0)
-		return pc;
-	      reg_num = inst_saves_gr (inst);
-	    }
-	  args_stored = 0;
-	  continue;
-	}
-
-      reg_num = inst_saves_fr (inst);
-      save_fr &= ~(1 << reg_num);
-
-      status = target_read_memory (pc + 4, buf, 4);
-      next_inst = extract_unsigned_integer (buf, 4);
-       
-      /* Yow! */
-      if (status != 0)
-	return pc;
-
-      /* We've got to be read to handle the ldo before the fp register
-	 save.  */
-      if ((inst & 0xfc000000) == 0x34000000
-	  && inst_saves_fr (next_inst) >= 4
-	  && inst_saves_fr (next_inst) <= 7)
-	{
-	  /* So we drop into the code below in a reasonable state.  */
-	  reg_num = inst_saves_fr (next_inst);
-	  pc -= 4;
-	}
-
-      /* Ugh.  Also account for argument stores into the stack.
-	 This is a kludge as on the HP compiler sets this bit and it
-	 never does prologue scheduling.  So once we see one, skip past
-	 all of them.  */
-      if (reg_num >= 4 && reg_num <= 7)
-	{
-	  while (reg_num >= 4 && reg_num <= 7)
-	    {
-	      pc += 8;
-	      status = target_read_memory (pc, buf, 4);
-	      inst = extract_unsigned_integer (buf, 4);
-	      if (status != 0)
-		return pc;
-	      if ((inst & 0xfc000000) != 0x34000000)
-		break;
-	      status = target_read_memory (pc + 4, buf, 4);
-	      next_inst = extract_unsigned_integer (buf, 4);
-	      if (status != 0)
-		return pc;
-	      reg_num = inst_saves_fr (next_inst);
-	    }
-	  args_stored = 0;
-	  continue;
-	}
-
-      /* Quit if we hit any kind of branch.  This can happen if a prologue
-	 instruction is in the delay slot of the first call/branch.  */
-      if (is_branch (inst))
-	break;
-
-      /* What a crock.  The HP compilers set args_stored even if no
-	 arguments were stored into the stack (boo hiss).  This could
-	 cause this code to then skip a bunch of user insns (up to the
-	 first branch).
-
-	 To combat this we try to identify when args_stored was bogusly
-	 set and clear it.   We only do this when args_stored is nonzero,
-	 all other resources are accounted for, and nothing changed on
-	 this pass.  */
-      if (args_stored
-	  && ! (save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
-	  && old_save_gr == save_gr && old_save_fr == save_fr
-	  && old_save_rp == save_rp && old_save_sp == save_sp
-	  && old_stack_remaining == stack_remaining)
-	break;
-      
-      /* Bump the PC.  */
-      pc += 4;
-    }
-
-  /* We've got a tenative location for the end of the prologue.  However
-     because of limitations in the unwind descriptor mechanism we may
-     have went too far into user code looking for the save of a register
-     that does not exist.  So, if there registers we expected to be saved
-     but never were, mask them out and restart.
-
-     This should only happen in optimized code, and should be very rare.  */
-  if (save_gr || (save_fr && ! (restart_fr || restart_gr)))
-    {
-      pc = orig_pc;
-      restart_gr = save_gr;
-      restart_fr = save_fr;
-      goto restart;
-    }
-
-  return pc;
-}
-
-
-
-
-
-/* return 0 if we cannot determine the end of the prologue,
-   return the new pc value if we know where the prologue ends */
-
-static CORE_ADDR
-after_prologue (pc)
-     CORE_ADDR pc;
-{
-  struct symtab_and_line sal;
-  CORE_ADDR func_addr, func_end;
-  struct symbol *f;
-
-  if (!find_pc_partial_function (pc, NULL, &func_addr, &func_end))
-    return 0;                   /* Unknown */
-
-  f = find_pc_function (pc);
-  if (!f)
-    return 0;			/* no debug info, do it the hard way! */
-
-  sal = find_pc_line (func_addr, 0);
-
-  if (sal.end < func_end)
-  {
-  /* this happens when the function has no prologue, because the way 
-     find_pc_line works: elz. Note: this may not be a very good
-     way to decide whether a function has a prologue or not, but
-     it is the best I can do with the info available
-     Also, this will work for functions like: int f()
-                                              {
-                                               return 2;
-                                              }
-    I.e. the bp will be inserted at the first open brace.
-    For functions where the body is only one line written like this:
-                                             int f()
-                                             { return 2; }
-   this will make the breakpoint to be at the last brace, after the body
-   has been executed already. What's the point of stepping through a function
-   without any variables anyway??  */
-
-    if ((SYMBOL_LINE(f) > 0) && (SYMBOL_LINE(f) < sal.line))
-     return pc; /*no adjusment will be made*/
-    else
-     return sal.end; /* this is the end of the prologue */
-  }
-  /* The line after the prologue is after the end of the function.  In this
-     case, put the end of the prologue is the beginning of the function.  */
-  /* This should happen only when the function is prologueless and has no
-     code in it. For instance void dumb(){} Note: this kind of function
-     is  used quite a lot in the test system */
-
-  else return pc; /* no adjustment will be made */
-}
-
-/* To skip prologues, I use this predicate.  Returns either PC itself
-   if the code at PC does not look like a function prologue; otherwise
-   returns an address that (if we're lucky) follows the prologue.  If
-   LENIENT, then we must skip everything which is involved in setting
-   up the frame (it's OK to skip more, just so long as we don't skip
-   anything which might clobber the registers which are being saved.
-   Currently we must not skip more on the alpha, but we might the lenient
-   stuff some day.  */
-
-CORE_ADDR
-skip_prologue (pc)
-     CORE_ADDR pc;
-{
-    unsigned long inst;
-    int offset;
-    CORE_ADDR post_prologue_pc;
-    char buf[4];
-
-#ifdef GDB_TARGET_HAS_SHARED_LIBS
-    /* Silently return the unaltered pc upon memory errors.
-       This could happen on OSF/1 if decode_line_1 tries to skip the
-       prologue for quickstarted shared library functions when the
-       shared library is not yet mapped in.
-       Reading target memory is slow over serial lines, so we perform
-       this check only if the target has shared libraries.  */
-    if (target_read_memory (pc, buf, 4))
-      return pc;
-#endif
-
-    /* See if we can determine the end of the prologue via the symbol table.
-       If so, then return either PC, or the PC after the prologue, whichever
-       is greater.  */
-
-    post_prologue_pc = after_prologue (pc);
-
-    if (post_prologue_pc != 0)
-      return max (pc, post_prologue_pc);
-
-
-   /* Can't determine prologue from the symbol table, (this can happen if there
-      is no debug information)  so we need to fall back on the old code, which
-      looks at the instructions */
-  /* FIXME (elz) !!!!: this may create a problem if, once the bp is hit, the user says
-     where: the backtrace info is not right: this is because the point at which we
-     break is at the very first instruction of the function. At this time the stuff that
-     needs to be saved on the stack, has not been saved yet, so the backtrace
-     cannot know all it needs to know. This will need to be fixed in the
-     actual backtrace code. (Note: this is what DDE does) */
-
-    else 
-
-      return (skip_prologue_hard_way(pc));
-
-#if 0
-/* elz: I am keeping this code around just in case, but remember, all the
-   instructions are for alpha: you should change all to the hppa instructions */
-
-    /* Can't determine prologue from the symbol table, need to examine
-       instructions.  */
-
-    /* Skip the typical prologue instructions. These are the stack adjustment
-       instruction and the instructions that save registers on the stack
-       or in the gcc frame.  */
-    for (offset = 0; offset < 100; offset += 4)
-      {
-        int status;
-
-        status = read_memory_nobpt (pc + offset, buf, 4);
-        if (status)
-          memory_error (status, pc + offset);
-        inst = extract_unsigned_integer (buf, 4);
-
-        /* The alpha has no delay slots. But let's keep the lenient stuff,
-           we might need it for something else in the future.  */
-        if (lenient && 0)
-          continue;
-
-        if ((inst & 0xffff0000) == 0x27bb0000) /* ldah $gp,n($t12) */
-	  continue;
-        if ((inst & 0xffff0000) == 0x23bd0000) /* lda $gp,n($gp) */
-            continue;
-        if ((inst & 0xffff0000) == 0x23de0000) /* lda $sp,n($sp) */
-            continue;
-        else if ((inst & 0xfc1f0000) == 0xb41e0000
-                 && (inst & 0xffff0000) != 0xb7fe0000)
-            continue;				/* stq reg,n($sp) */
-						/* reg != $zero */
-        else if ((inst & 0xfc1f0000) == 0x9c1e0000
-                 && (inst & 0xffff0000) != 0x9ffe0000)
-            continue;				/* stt reg,n($sp) */
-						/* reg != $zero */
-        else if (inst == 0x47de040f)            /* bis sp,sp,fp */
-            continue;
-        else
-            break;
-	    }
-    return pc + offset;
-#endif /* 0 */
-}
-
-/* Put here the code to store, into a struct frame_saved_regs,
-   the addresses of the saved registers of frame described by FRAME_INFO.
-   This includes special registers such as pc and fp saved in special
-   ways in the stack frame.  sp is even more special:
-   the address we return for it IS the sp for the next frame.  */
-
-void
-hppa_frame_find_saved_regs (frame_info, frame_saved_regs)
-     struct frame_info *frame_info;
-     struct frame_saved_regs *frame_saved_regs;
-{
-  CORE_ADDR pc;
-  struct unwind_table_entry *u;
-  unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp;
-  int status, i, reg;
-  char buf[4];
-  int fp_loc = -1;
-
-  /* Zero out everything.  */
-  memset (frame_saved_regs, '\0', sizeof (struct frame_saved_regs));
-
-  /* Call dummy frames always look the same, so there's no need to
-     examine the dummy code to determine locations of saved registers;
-     instead, let find_dummy_frame_regs fill in the correct offsets
-     for the saved registers.  */
-  if ((frame_info->pc >= frame_info->frame
-       && frame_info->pc <= (frame_info->frame + CALL_DUMMY_LENGTH
-			     + 32 * 4 +	 (NUM_REGS - FP0_REGNUM) * 8
-			     + 6 * 4)))	
-    find_dummy_frame_regs (frame_info, frame_saved_regs);
-
-  /* Interrupt handlers are special too.  They lay out the register
-     state in the exact same order as the register numbers in GDB.  */
-  if (pc_in_interrupt_handler (frame_info->pc))
-    {
-      for (i = 0; i < NUM_REGS; i++)
-	{
-	  /* SP is a little special.  */
-	  if (i == SP_REGNUM)
-	    frame_saved_regs->regs[SP_REGNUM]
-	      = read_memory_integer (frame_info->frame + SP_REGNUM * 4, 4);
-	  else
-	    frame_saved_regs->regs[i] = frame_info->frame + i * 4;
-	}
-      return;
-    }
-
-#ifdef FRAME_FIND_SAVED_REGS_IN_SIGTRAMP
-  /* Handle signal handler callers.  */
-  if (frame_info->signal_handler_caller)
-    {
-      FRAME_FIND_SAVED_REGS_IN_SIGTRAMP (frame_info, frame_saved_regs);
-      return;
-    }
-#endif
-
-  /* Get the starting address of the function referred to by the PC
-     saved in frame.  */
-  pc = get_pc_function_start (frame_info->pc);
-
-  /* Yow! */
-  u = find_unwind_entry (pc);
-  if (!u)
-    return;
-
-  /* This is how much of a frame adjustment we need to account for.  */
-  stack_remaining = u->Total_frame_size << 3;
-
-  /* Magic register saves we want to know about.  */
-  save_rp = u->Save_RP;
-  save_sp = u->Save_SP;
-
-  /* Turn the Entry_GR field into a bitmask.  */
-  save_gr = 0;
-  for (i = 3; i < u->Entry_GR + 3; i++)
-    {
-      /* Frame pointer gets saved into a special location.  */
-      if (u->Save_SP && i == FP_REGNUM)
-	continue;
-
-      save_gr |= (1 << i);
-    }
-
-  /* Turn the Entry_FR field into a bitmask too.  */
-  save_fr = 0;
-  for (i = 12; i < u->Entry_FR + 12; i++)
-    save_fr |= (1 << i);
-
-  /* The frame always represents the value of %sp at entry to the
-     current function (and is thus equivalent to the "saved" stack
-     pointer.  */
-  frame_saved_regs->regs[SP_REGNUM] = frame_info->frame;
-
-  /* Loop until we find everything of interest or hit a branch.
-
-     For unoptimized GCC code and for any HP CC code this will never ever
-     examine any user instructions.
-
-     For optimzied GCC code we're faced with problems.  GCC will schedule
-     its prologue and make prologue instructions available for delay slot
-     filling.  The end result is user code gets mixed in with the prologue
-     and a prologue instruction may be in the delay slot of the first branch
-     or call.
-
-     Some unexpected things are expected with debugging optimized code, so
-     we allow this routine to walk past user instructions in optimized
-     GCC code.  */
-  while (save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
-    {
-      status = target_read_memory (pc, buf, 4);
-      inst = extract_unsigned_integer (buf, 4);
-
-      /* Yow! */
-      if (status != 0)
-	return;
-
-      /* Note the interesting effects of this instruction.  */
-      stack_remaining -= prologue_inst_adjust_sp (inst);
-
-      /* There is only one instruction used for saving RP into the stack.  */
-      if (inst == 0x6bc23fd9)
-	{
-	  save_rp = 0;
-	  frame_saved_regs->regs[RP_REGNUM] = frame_info->frame - 20;
-	}
-
-      /* Just note that we found the save of SP into the stack.  The
-	 value for frame_saved_regs was computed above.  */
-      if ((inst & 0xffffc000) == 0x6fc10000)
-	save_sp = 0;
-
-      /* Account for general and floating-point register saves.  */
-      reg = inst_saves_gr (inst);
-      if (reg >= 3 && reg <= 18
-	  && (!u->Save_SP || reg != FP_REGNUM))
-	{
-	  save_gr &= ~(1 << reg);
-
-	  /* stwm with a positive displacement is a *post modify*.  */
-	  if ((inst >> 26) == 0x1b
-	      && extract_14 (inst) >= 0)
-	    frame_saved_regs->regs[reg] = frame_info->frame;
-	  else
-	    {
-	      /* Handle code with and without frame pointers.  */
-	      if (u->Save_SP)
-		frame_saved_regs->regs[reg]
-		  = frame_info->frame + extract_14 (inst);
-	      else
-		frame_saved_regs->regs[reg]
-		  = frame_info->frame + (u->Total_frame_size << 3)
-		    + extract_14 (inst);
-	    }
-	}
-
-
-      /* GCC handles callee saved FP regs a little differently.  
-
-	 It emits an instruction to put the value of the start of
-	 the FP store area into %r1.  It then uses fstds,ma with
-	 a basereg of %r1 for the stores.
-
-	 HP CC emits them at the current stack pointer modifying
-	 the stack pointer as it stores each register.  */
-
-      /* ldo X(%r3),%r1 or ldo X(%r30),%r1.  */
-      if ((inst & 0xffffc000) == 0x34610000
-	  || (inst & 0xffffc000) == 0x37c10000)
-	fp_loc = extract_14 (inst);
-	
-      reg = inst_saves_fr (inst);
-      if (reg >= 12 && reg <= 21)
-	{
-	  /* Note +4 braindamage below is necessary because the FP status
-	     registers are internally 8 registers rather than the expected
-	     4 registers.  */
-	  save_fr &= ~(1 << reg);
-	  if (fp_loc == -1)
-	    {
-	      /* 1st HP CC FP register store.  After this instruction
-		 we've set enough state that the GCC and HPCC code are
-		 both handled in the same manner.  */
-	      frame_saved_regs->regs[reg + FP4_REGNUM + 4] = frame_info->frame;
-	      fp_loc = 8;
-	    }
-	  else
-	    {
-	      frame_saved_regs->regs[reg + FP0_REGNUM + 4]
-		= frame_info->frame + fp_loc;
-	      fp_loc += 8;
-	    }
-	}
-
-      /* Quit if we hit any kind of branch.  This can happen if a prologue
-	 instruction is in the delay slot of the first call/branch.  */
-      if (is_branch (inst))
-	break;
-
-      /* Bump the PC.  */
-      pc += 4;
-    }
-}
-
-
-/* Exception handling support for the HP-UX ANSI C++ compiler.
-   The compiler (aCC) provides a callback for exception events;
-   GDB can set a breakpoint on this callback and find out what
-   exception event has occurred. */
-
-/* The name of the hook to be set to point to the callback function */
-static char HP_ACC_EH_notify_hook[]     = "__eh_notify_hook";
-/* The name of the function to be used to set the hook value */ 
-static char HP_ACC_EH_set_hook_value[]  = "__eh_set_hook_value";
-/* The name of the callback function in end.o */ 
-static char HP_ACC_EH_notify_callback[] = "__d_eh_notify_callback";
-/* Name of function in end.o on which a break is set (called by above) */ 
-static char HP_ACC_EH_break[]           = "__d_eh_break";
-/* Name of flag (in end.o) that enables catching throws */ 
-static char HP_ACC_EH_catch_throw[]     = "__d_eh_catch_throw";
-/* Name of flag (in end.o) that enables catching catching */ 
-static char HP_ACC_EH_catch_catch[]     = "__d_eh_catch_catch";
-/* The enum used by aCC */ 
-typedef enum {
-  __EH_NOTIFY_THROW,
-  __EH_NOTIFY_CATCH
-} __eh_notification;
-
-/* Is exception-handling support available with this executable? */
-static int hp_cxx_exception_support = 0;
-/* Has the initialize function been run? */
-int hp_cxx_exception_support_initialized = 0;
-/* Similar to above, but imported from breakpoint.c -- non-target-specific */
-extern int exception_support_initialized;
-/* Address of __eh_notify_hook */
-static CORE_ADDR eh_notify_hook_addr = NULL;
-/* Address of __d_eh_notify_callback */
-static CORE_ADDR eh_notify_callback_addr = NULL;
-/* Address of __d_eh_break */
-static CORE_ADDR eh_break_addr = NULL;
-/* Address of __d_eh_catch_catch */
-static CORE_ADDR eh_catch_catch_addr = NULL;
-/* Address of __d_eh_catch_throw */
-static CORE_ADDR eh_catch_throw_addr = NULL;
-/* Sal for __d_eh_break */
-static struct symtab_and_line * break_callback_sal = NULL;
-
-/* Code in end.c expects __d_pid to be set in the inferior,
-   otherwise __d_eh_notify_callback doesn't bother to call
-   __d_eh_break!  So we poke the pid into this symbol
-   ourselves.
-   0 => success
-   1 => failure  */ 
-int
-setup_d_pid_in_inferior ()
-{
-  CORE_ADDR anaddr;
-  struct minimal_symbol * msymbol;
-  char buf[4]; /* FIXME 32x64? */
-  
-  /* Slam the pid of the process into __d_pid; failing is only a warning!  */
-  msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile);
-  if (msymbol == NULL)
-    {
-      warning ("Unable to find __d_pid symbol in object file.");
-      warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
-      return 1;
-    }
-
-  anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
-  store_unsigned_integer (buf, 4, inferior_pid); /* FIXME 32x64? */
-  if (target_write_memory (anaddr, buf, 4)) /* FIXME 32x64? */
-    {
-      warning ("Unable to write __d_pid");
-      warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
-      return 1;
-    }
-  return 0;
-}
-
-/* Initialize exception catchpoint support by looking for the
-   necessary hooks/callbacks in end.o, etc., and set the hook value to
-   point to the required debug function
-
-   Return 0 => failure
-          1 => success          */
-
-static int
-initialize_hp_cxx_exception_support ()
-{
-  struct symtabs_and_lines sals;
-  struct cleanup * old_chain;
-  struct cleanup * canonical_strings_chain = NULL;
-  int i;
-  char * addr_start;
-  char * addr_end = NULL;
-  char ** canonical = (char **) NULL;
-  int thread = -1;
-  struct symbol * sym = NULL;
-  struct minimal_symbol * msym = NULL;
-  struct objfile * objfile;
-  asection *shlib_info;
-
-  /* Detect and disallow recursion.  On HP-UX with aCC, infinite
-     recursion is a possibility because finding the hook for exception
-     callbacks involves making a call in the inferior, which means
-     re-inserting breakpoints which can re-invoke this code */
-
-  static int recurse = 0;  
-  if (recurse > 0) 
-    {
-      hp_cxx_exception_support_initialized = 0;
-      exception_support_initialized = 0;
-      return 0;
-    }
-
-  hp_cxx_exception_support = 0;
-
-  /* First check if we have seen any HP compiled objects; if not,
-     it is very unlikely that HP's idiosyncratic callback mechanism
-     for exception handling debug support will be available!
-     This will percolate back up to breakpoint.c, where our callers
-     will decide to try the g++ exception-handling support instead. */
-  if (!hp_som_som_object_present)
-    return 0;
-  
-  /* We have a SOM executable with SOM debug info; find the hooks */
-
-  /* First look for the notify hook provided by aCC runtime libs */
-  /* If we find this symbol, we conclude that the executable must
-     have HP aCC exception support built in.  If this symbol is not
-     found, even though we're a HP SOM-SOM file, we may have been
-     built with some other compiler (not aCC).  This results percolates
-     back up to our callers in breakpoint.c which can decide to
-     try the g++ style of exception support instead.
-     If this symbol is found but the other symbols we require are
-     not found, there is something weird going on, and g++ support
-     should *not* be tried as an alternative.
-     
-     ASSUMPTION: Only HP aCC code will have __eh_notify_hook defined.  
-     ASSUMPTION: HP aCC and g++ modules cannot be linked together. */
-  
-  /* libCsup has this hook; it'll usually be non-debuggable */
-  msym = lookup_minimal_symbol (HP_ACC_EH_notify_hook, NULL, NULL);
-  if (msym)
-    {
-      eh_notify_hook_addr = SYMBOL_VALUE_ADDRESS (msym);
-      hp_cxx_exception_support = 1;
-    }  
-  else
-    {
-      warning ("Unable to find exception callback hook (%s).", HP_ACC_EH_notify_hook);
-      warning ("Executable may not have been compiled debuggable with HP aCC.");
-      warning ("GDB will be unable to intercept exception events.");
-      eh_notify_hook_addr = 0;
-      hp_cxx_exception_support = 0;
-      return 0;
-    }
-
-#if 0 /* DEBUGGING */
-  printf ("Hook addr found is %lx\n", eh_notify_hook_addr);
-#endif
-
-  /* Next look for the notify callback routine in end.o */
-  /* This is always available in the SOM symbol dictionary if end.o is linked in */ 
-  msym = lookup_minimal_symbol (HP_ACC_EH_notify_callback, NULL, NULL);
-  if (msym)
-    {
-      eh_notify_callback_addr = SYMBOL_VALUE_ADDRESS (msym);
-      hp_cxx_exception_support = 1;
-    }  
-  else 
-    {
-      warning ("Unable to find exception callback routine (%s).", HP_ACC_EH_notify_callback);
-      warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
-      warning ("GDB will be unable to intercept exception events.");
-      eh_notify_callback_addr = 0;
-      return 0;
-    }
-
-  /* Check whether the executable is dynamically linked or archive bound */
-  /* With an archive-bound executable we can use the raw addresses we find
-     for the callback function, etc. without modification. For an executable
-     with shared libraries, we have to do more work to find the plabel, which
-     can be the target of a call through $$dyncall from the aCC runtime support
-     library (libCsup) which is linked shared by default by aCC. */
-  /* This test below was copied from somsolib.c/somread.c.  It may not be a very
-     reliable one to test that an executable is linked shared. pai/1997-07-18 */ 
-  shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$");
-  if (shlib_info && (bfd_section_size (symfile_objfile->obfd, shlib_info) != 0))
-    {
-      /* The minsym we have has the local code address, but that's not the
-         plabel that can be used by an inter-load-module call. */
-      /* Find solib handle for main image (which has end.o), and use that
-         and the min sym as arguments to __d_shl_get() (which does the equivalent
-         of shl_findsym()) to find the plabel. */ 
-
-      args_for_find_stub args;
-      static char message[] = "Error while finding exception callback hook:\n";
-      
-      args.solib_handle = som_solib_get_solib_by_pc (eh_notify_callback_addr);
-      args.msym = msym;
-      
-      recurse++;
-      eh_notify_callback_addr = catch_errors ((int (*) PARAMS ((char *))) cover_find_stub_with_shl_get,
-                                              (char *) &args,
-                                              message, RETURN_MASK_ALL);
-      recurse--;
-      
-#if 0 /* DEBUGGING  */
-      printf ("found plabel for eh notify callback: %x\n", eh_notify_callback_addr);
-#endif
-
-      exception_catchpoints_are_fragile = 1;
-      
-      if (!eh_notify_callback_addr)
-        {
-          /* We can get here either if there is no plabel in the export list
-             for the main image, or if something strange happened (??) */ 
-          warning ("Couldn't find a plabel (indirect function label) for the exception callback.");
-          warning ("GDB will not be able to intercept exception events.");
-          return 0;
-        }
-    }
-  else
-    exception_catchpoints_are_fragile = 0;
-
-#if 0  /* DEBUGGING */
-  printf ("Cb addr found is %lx\n", eh_notify_callback_addr);
-#endif
-
-  /* Now, look for the breakpointable routine in end.o */
-  /* This should also be available in the SOM symbol dict. if end.o linked in */ 
-  msym = lookup_minimal_symbol (HP_ACC_EH_break, NULL, NULL);
-  if (msym)
-    {
-      eh_break_addr = SYMBOL_VALUE_ADDRESS (msym);
-      hp_cxx_exception_support = 1;
-    }  
-  else
-    {
-      warning ("Unable to find exception callback routine to set breakpoint (%s).", HP_ACC_EH_break);
-      warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
-      warning ("GDB will be unable to intercept exception events.");
-      eh_break_addr = 0;
-      return 0;
-    }
-
-#if 0  /* DEBUGGING */
-  printf ("break addr found is %lx\n", eh_break_addr);  
-#endif
-  
-  /* Next look for the catch enable flag provided in end.o */
-  sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL,
-                       VAR_NAMESPACE, 0, (struct symtab **) NULL);
-  if (sym) /* sometimes present in debug info */ 
-    {
-      eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (sym);
-      hp_cxx_exception_support = 1;
-    }
-  else  /* otherwise look in SOM symbol dict. */ 
-    {
-      msym = lookup_minimal_symbol (HP_ACC_EH_catch_catch, NULL, NULL);
-      if (msym)
-        {
-          eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (msym);
-          hp_cxx_exception_support = 1;
-        }  
-      else
-        {
-          warning ("Unable to enable interception of exception catches.");
-          warning ("Executable may not have been compiled debuggable with HP aCC.");
-          warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
-          return 0;
-        }
-    }
-
-#if 0  /* DEBUGGING */
-  printf ("catch catch addr found is %lx\n", eh_catch_catch_addr);
-#endif
-
-  /* Next look for the catch enable flag provided end.o */
-  sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL,
-                       VAR_NAMESPACE, 0, (struct symtab **) NULL);
-  if (sym) /* sometimes present in debug info */ 
-    {
-      eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (sym);
-      hp_cxx_exception_support = 1;
-    }
-  else /* otherwise look in SOM symbol dict. */ 
-    {
-      msym = lookup_minimal_symbol (HP_ACC_EH_catch_throw, NULL, NULL);
-      if (msym)
-        {
-          eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (msym);
-          hp_cxx_exception_support = 1;
-        }  
-      else
-        {
-          warning ("Unable to enable interception of exception throws.");
-          warning ("Executable may not have been compiled debuggable with HP aCC.");
-          warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
-          return 0;
-        }
-    }
-
-#if 0  /* DEBUGGING */
-  printf ("catch throw addr found is %lx\n", eh_catch_throw_addr);
-#endif
-
-  /* Set the flags */ 
-  hp_cxx_exception_support = 2; /* everything worked so far */ 
-  hp_cxx_exception_support_initialized = 1;
-  exception_support_initialized = 1;
-
-  return 1;
-}
-
-/* Target operation for enabling or disabling interception of
-   exception events.
-   KIND is either EX_EVENT_THROW or EX_EVENT_CATCH
-   ENABLE is either 0 (disable) or 1 (enable).
-   Return value is NULL if no support found;
-   -1 if something went wrong,
-   or a pointer to a symtab/line struct if the breakpointable
-   address was found. */ 
-
-struct symtab_and_line * 
-child_enable_exception_callback (kind, enable)
-  enum exception_event_kind kind;
-  int enable;
-{
-  char buf[4];
-
-  if (!exception_support_initialized || !hp_cxx_exception_support_initialized)
-    if (!initialize_hp_cxx_exception_support ())
-      return NULL;
-
-  switch (hp_cxx_exception_support)
-    {
-      case 0:
-        /* Assuming no HP support at all */ 
-        return NULL;
-      case 1:
-        /* HP support should be present, but something went wrong */ 
-        return (struct symtab_and_line *) -1; /* yuck! */ 
-      /* there may be other cases in the future */ 
-    }
-        
-  /* Set the EH hook to point to the callback routine */
-  store_unsigned_integer (buf, 4, enable ? eh_notify_callback_addr : 0); /* FIXME 32x64 problem */
-  /* pai: (temp) FIXME should there be a pack operation first? */
-  if (target_write_memory (eh_notify_hook_addr, buf, 4))    /* FIXME 32x64 problem */
-    {
-      warning ("Could not write to target memory for exception event callback.");
-      warning ("Interception of exception events may not work.");
-      return (struct symtab_and_line *) -1; 
-    }
-  if (enable)
-    {
-      /* Ensure that __d_pid is set up correctly -- end.c code checks this. :-(*/
-      if (inferior_pid > 0)
-        {
-          if (setup_d_pid_in_inferior ())
-            return (struct symtab_and_line *) -1; 
-        }
-      else
-        {
-          warning ("Internal error: Invalid inferior pid?  Cannot intercept exception events."); /* purecov: deadcode */
-          return (struct symtab_and_line *) -1; /* purecov: deadcode */
-        }
-    }
-  
-  switch (kind)
-    {
-      case EX_EVENT_THROW:
-        store_unsigned_integer (buf, 4, enable ? 1 : 0);
-        if (target_write_memory (eh_catch_throw_addr, buf, 4)) /* FIXME 32x64? */
-          {
-            warning ("Couldn't enable exception throw interception.");
-            return (struct symtab_and_line *) -1;
-          }
-        break;
-      case EX_EVENT_CATCH:
-        store_unsigned_integer (buf, 4, enable ? 1 : 0);
-        if (target_write_memory (eh_catch_catch_addr, buf, 4)) /* FIXME 32x64? */
-          {
-            warning ("Couldn't enable exception catch interception.");
-            return (struct symtab_and_line *) -1;
-          }
-        break;
-      default: /* purecov: deadcode */
-        error ("Request to enable unknown or unsupported exception event."); /* purecov: deadcode */
-    }
-  
-  /* Copy break address into new sal struct, malloc'ing if needed. */
-  if (!break_callback_sal)
-    {
-      break_callback_sal = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line));
-    }
-  INIT_SAL(break_callback_sal);
-  break_callback_sal->symtab = NULL;
-  break_callback_sal->pc = eh_break_addr;
-  break_callback_sal->line = 0;
-  break_callback_sal->end = eh_break_addr;
-  
-  return break_callback_sal;
-}
-
-/* Record some information about the current exception event */ 
-static struct exception_event_record current_ex_event;
-/* Convenience struct */ 
-static struct symtab_and_line null_symtab_and_line = { NULL, 0, 0, 0 };
-
-/* Report current exception event.  Returns a pointer to a record
-   that describes the kind of the event, where it was thrown from,
-   and where it will be caught.  More information may be reported
-   in the future */ 
-struct exception_event_record *
-child_get_current_exception_event ()
-{
-  CORE_ADDR  event_kind;
-  CORE_ADDR  throw_addr;
-  CORE_ADDR  catch_addr;
-  struct frame_info *fi, *curr_frame;
-  int level = 1;
-
-  curr_frame = get_current_frame();
-  if (!curr_frame)
-    return (struct exception_event_record *) NULL;
-
-  /* Go up one frame to __d_eh_notify_callback, because at the
-     point when this code is executed, there's garbage in the
-     arguments of __d_eh_break. */
-  fi = find_relative_frame (curr_frame, &level);
-  if (level != 0)
-    return (struct exception_event_record *) NULL;
-
-  select_frame (fi, -1);
-
-  /* Read in the arguments */
-  /* __d_eh_notify_callback() is called with 3 arguments:
-          1. event kind catch or throw
-          2. the target address if known
-          3. a flag -- not sure what this is. pai/1997-07-17 */
-  event_kind = read_register (ARG0_REGNUM);  
-  catch_addr = read_register (ARG1_REGNUM);
-
-  /* Now go down to a user frame */
-  /* For a throw, __d_eh_break is called by
-                  __d_eh_notify_callback which is called by
-                  __notify_throw which is called
-                  from user code.
-     For a catch, __d_eh_break is called by
-                  __d_eh_notify_callback which is called by
-                  <stackwalking stuff> which is called by
-                  __throw__<stuff> or __rethrow_<stuff> which is called
-                  from user code. */
-  /* FIXME: Don't use such magic numbers; search for the frames */ 
-  level = (event_kind == EX_EVENT_THROW) ? 3 : 4;
-  fi = find_relative_frame (curr_frame, &level);
-  if (level != 0)
-    return (struct exception_event_record *) NULL;
-
-  select_frame (fi, -1);
-  throw_addr = fi->pc;
-
-  /* Go back to original (top) frame */
-  select_frame (curr_frame, -1);
-
-  current_ex_event.kind = (enum exception_event_kind) event_kind;
-  current_ex_event.throw_sal = find_pc_line (throw_addr, 1);
-  current_ex_event.catch_sal = find_pc_line (catch_addr, 1);
-
-  return &current_ex_event;
-}
-
-
-#ifdef MAINTENANCE_CMDS
-
-static void
-unwind_command (exp, from_tty)
-     char *exp;
-     int from_tty;
-{
-  CORE_ADDR address;
-  struct unwind_table_entry *u;
-
-  /* If we have an expression, evaluate it and use it as the address.  */
-
-  if (exp != 0 && *exp != 0)
-    address = parse_and_eval_address (exp);
-  else
-    return;
-
-  u = find_unwind_entry (address);
-
-  if (!u)
-    {
-      printf_unfiltered ("Can't find unwind table entry for %s\n", exp);
-      return;
-    }
-
-  printf_unfiltered ("unwind_table_entry (0x%x):\n", u);
-
-  printf_unfiltered ("\tregion_start = ");
-  print_address (u->region_start, gdb_stdout);
-
-  printf_unfiltered ("\n\tregion_end = ");
-  print_address (u->region_end, gdb_stdout);
-
-#ifdef __STDC__
-#define pif(FLD) if (u->FLD) printf_unfiltered (" "#FLD);
-#else
-#define pif(FLD) if (u->FLD) printf_unfiltered (" FLD");
-#endif
-
-  printf_unfiltered ("\n\tflags =");
-  pif (Cannot_unwind);
-  pif (Millicode);
-  pif (Millicode_save_sr0);
-  pif (Entry_SR);
-  pif (Args_stored);
-  pif (Variable_Frame);
-  pif (Separate_Package_Body);
-  pif (Frame_Extension_Millicode);
-  pif (Stack_Overflow_Check);
-  pif (Two_Instruction_SP_Increment);
-  pif (Ada_Region);
-  pif (Save_SP);
-  pif (Save_RP);
-  pif (Save_MRP_in_frame);
-  pif (extn_ptr_defined);
-  pif (Cleanup_defined);
-  pif (MPE_XL_interrupt_marker);
-  pif (HP_UX_interrupt_marker);
-  pif (Large_frame);
-
-  putchar_unfiltered ('\n');
-
-#ifdef __STDC__
-#define pin(FLD) printf_unfiltered ("\t"#FLD" = 0x%x\n", u->FLD);
-#else
-#define pin(FLD) printf_unfiltered ("\tFLD = 0x%x\n", u->FLD);
-#endif
-
-  pin (Region_description);
-  pin (Entry_FR);
-  pin (Entry_GR);
-  pin (Total_frame_size);
-}
-#endif /* MAINTENANCE_CMDS */
-
-#ifdef PREPARE_TO_PROCEED
-
-/* If the user has switched threads, and there is a breakpoint
-   at the old thread's pc location, then switch to that thread
-   and return TRUE, else return FALSE and don't do a thread
-   switch (or rather, don't seem to have done a thread switch).
-
-   Ptrace-based gdb will always return FALSE to the thread-switch
-   query, and thus also to PREPARE_TO_PROCEED.
-
-   The important thing is whether there is a BPT instruction,
-   not how many user breakpoints there are.  So we have to worry
-   about things like these:
-
-   o  Non-bp stop -- NO
-
-   o  User hits bp, no switch -- NO
-
-   o  User hits bp, switches threads -- YES
-
-   o  User hits bp, deletes bp, switches threads -- NO
-
-   o  User hits bp, deletes one of two or more bps
-      at that PC, user switches threads -- YES
-
-   o  Plus, since we're buffering events, the user may have hit a
-      breakpoint, deleted the breakpoint and then gotten another
-      hit on that same breakpoint on another thread which
-      actually hit before the delete. (FIXME in breakpoint.c
-      so that "dead" breakpoints are ignored?) -- NO
-
-   For these reasons, we have to violate information hiding and
-   call "breakpoint_here_p".  If core gdb thinks there is a bpt
-   here, that's what counts, as core gdb is the one which is
-   putting the BPT instruction in and taking it out. */
-int
-hppa_prepare_to_proceed()
-{
-  pid_t old_thread;
-  pid_t current_thread;
-
-  old_thread = hppa_switched_threads(inferior_pid);
-  if (old_thread != 0)
-    {
-      /* Switched over from "old_thread".  Try to do
-         as little work as possible, 'cause mostly
-         we're going to switch back. */
-      CORE_ADDR new_pc;
-      CORE_ADDR old_pc = read_pc();
-
-      /* Yuk, shouldn't use global to specify current
-         thread.  But that's how gdb does it. */
-      current_thread = inferior_pid;
-      inferior_pid   = old_thread;
-
-      new_pc = read_pc();
-      if (new_pc != old_pc          /* If at same pc, no need */
-	  && breakpoint_here_p (new_pc))
-        {
-	  /* User hasn't deleted the BP.
-             Return TRUE, finishing switch to "old_thread". */
-	  flush_cached_frames ();
-	  registers_changed ();
-#if 0
-	  printf("---> PREPARE_TO_PROCEED (was %d, now %d)!\n",
-		  current_thread, inferior_pid);
-#endif
-               
-	  return 1;
-        }
-
-      /* Otherwise switch back to the user-chosen thread. */
-      inferior_pid = current_thread;
-      new_pc       = read_pc();       /* Re-prime register cache */
-    }
-
-  return 0;
-}
-#endif /* PREPARE_TO_PROCEED */
-
-void
-_initialize_hppa_tdep ()
-{
-  tm_print_insn = print_insn_hppa;
-
-#ifdef MAINTENANCE_CMDS
-  add_cmd ("unwind", class_maintenance, unwind_command,
-	   "Print unwind table entry at given address.",
-	   &maintenanceprintlist);
-#endif /* MAINTENANCE_CMDS */
-}