Initial creation of sourceware repository

1 files changed, 0 insertions, 1349 deletions

diff --git a/gdb/irix5-nat.c b/gdb/irix5-nat.c
deleted file mode 100644
index b3373a9..0000000
--- a/gdb/irix5-nat.c
+++ /dev/null
@@ -1,1349 +0,0 @@
-/* Native support for the SGI Iris running IRIX version 5, for GDB.
-   Copyright 1988, 89, 90, 91, 92, 93, 94, 95, 96, 98, 1999
-   Free Software Foundation, Inc.
-   Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
-   and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
-   Implemented for Irix 4.x by Garrett A. Wollman.
-   Modified for Irix 5.x by Ian Lance Taylor.
-
-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 "inferior.h"
-#include "gdbcore.h"
-#include "target.h"
-
-#include "gdb_string.h"
-#include <sys/time.h>
-#include <sys/procfs.h>
-#include <setjmp.h>		/* For JB_XXX.  */
-
-static void
-fetch_core_registers PARAMS ((char *, unsigned int, int, CORE_ADDR));
-
-/* Size of elements in jmpbuf */
-
-#define JB_ELEMENT_SIZE 4
-
-/*
- * See the comment in m68k-tdep.c regarding the utility of these functions.
- *
- * These definitions are from the MIPS SVR4 ABI, so they may work for
- * any MIPS SVR4 target.
- */
-
-void 
-supply_gregset (gregsetp)
-     gregset_t *gregsetp;
-{
-  register int regi;
-  register greg_t *regp = &(*gregsetp)[0];
-  int gregoff = sizeof (greg_t) - MIPS_REGSIZE;
-  static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
-
-  for(regi = 0; regi <= CTX_RA; regi++)
-    supply_register (regi, (char *)(regp + regi) + gregoff);
-
-  supply_register (PC_REGNUM, (char *)(regp + CTX_EPC) + gregoff);
-  supply_register (HI_REGNUM, (char *)(regp + CTX_MDHI) + gregoff);
-  supply_register (LO_REGNUM, (char *)(regp + CTX_MDLO) + gregoff);
-  supply_register (CAUSE_REGNUM, (char *)(regp + CTX_CAUSE) + gregoff);
-
-  /* Fill inaccessible registers with zero.  */
-  supply_register (BADVADDR_REGNUM, zerobuf);
-}
-
-void
-fill_gregset (gregsetp, regno)
-     gregset_t *gregsetp;
-     int regno;
-{
-  int regi;
-  register greg_t *regp = &(*gregsetp)[0];
-
-  /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
-     executable, we have to sign extend the registers to 64 bits before
-     filling in the gregset structure.  */
-
-  for (regi = 0; regi <= CTX_RA; regi++)
-    if ((regno == -1) || (regno == regi))
-      *(regp + regi) =
-	extract_signed_integer (&registers[REGISTER_BYTE (regi)],
-				REGISTER_RAW_SIZE (regi));
-
-  if ((regno == -1) || (regno == PC_REGNUM))
-    *(regp + CTX_EPC) =
-      extract_signed_integer (&registers[REGISTER_BYTE (PC_REGNUM)],
-			      REGISTER_RAW_SIZE (PC_REGNUM));
-
-  if ((regno == -1) || (regno == CAUSE_REGNUM))
-    *(regp + CTX_CAUSE) =
-      extract_signed_integer (&registers[REGISTER_BYTE (CAUSE_REGNUM)],
-			      REGISTER_RAW_SIZE (CAUSE_REGNUM));
-
-  if ((regno == -1) || (regno == HI_REGNUM))
-    *(regp + CTX_MDHI) =
-      extract_signed_integer (&registers[REGISTER_BYTE (HI_REGNUM)],
-			      REGISTER_RAW_SIZE (HI_REGNUM));
-
-  if ((regno == -1) || (regno == LO_REGNUM))
-    *(regp + CTX_MDLO) =
-      extract_signed_integer (&registers[REGISTER_BYTE (LO_REGNUM)],
-			      REGISTER_RAW_SIZE (LO_REGNUM));
-}
-
-/*
- * Now we do the same thing for floating-point registers.
- * We don't bother to condition on FP0_REGNUM since any
- * reasonable MIPS configuration has an R3010 in it.
- *
- * Again, see the comments in m68k-tdep.c.
- */
-
-void
-supply_fpregset (fpregsetp)
-     fpregset_t *fpregsetp;
-{
-  register int regi;
-  static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
-
-  /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
-
-  for (regi = 0; regi < 32; regi++)
-    supply_register (FP0_REGNUM + regi,
-		     (char *)&fpregsetp->fp_r.fp_regs[regi]);
-
-  supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
-
-  /* FIXME: how can we supply FCRIR_REGNUM?  SGI doesn't tell us. */
-  supply_register (FCRIR_REGNUM, zerobuf);
-}
-
-void
-fill_fpregset (fpregsetp, regno)
-     fpregset_t *fpregsetp;
-     int regno;
-{
-  int regi;
-  char *from, *to;
-
-  /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
-
-  for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
-    {
-      if ((regno == -1) || (regno == regi))
-	{
-	  from = (char *) &registers[REGISTER_BYTE (regi)];
-	  to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
-	  memcpy(to, from, REGISTER_RAW_SIZE (regi));
-	}
-    }
-
-  if ((regno == -1) || (regno == FCRCS_REGNUM))
-    fpregsetp->fp_csr = *(unsigned *) &registers[REGISTER_BYTE(FCRCS_REGNUM)];
-}
-
-
-/* Figure out where the longjmp will land.
-   We expect the first arg to be a pointer to the jmp_buf structure from which
-   we extract the pc (JB_PC) that we will land at.  The pc is copied into PC.
-   This routine returns true on success. */
-
-int
-get_longjmp_target (pc)
-     CORE_ADDR *pc;
-{
-  char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
-  CORE_ADDR jb_addr;
-
-  jb_addr = read_register (A0_REGNUM);
-
-  if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
-			  TARGET_PTR_BIT / TARGET_CHAR_BIT))
-    return 0;
-
-  *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
-
-  return 1;
-}
-
-static void
-fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
-     char *core_reg_sect;
-     unsigned core_reg_size;
-     int which;			/* Unused */
-     CORE_ADDR reg_addr;	/* Unused */
-{
-  if (core_reg_size == REGISTER_BYTES)
-    {
-      memcpy ((char *)registers, core_reg_sect, core_reg_size);
-    }
-  else if (MIPS_REGSIZE == 4 &&
-	   core_reg_size == (2 * MIPS_REGSIZE) * NUM_REGS)
-    {
-      /* This is a core file from a N32 executable, 64 bits are saved
-	 for all registers.  */
-      char *srcp = core_reg_sect;
-      char *dstp = registers;
-      int regno;
-
-      for (regno = 0; regno < NUM_REGS; regno++)
-	{
-	  if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32))
-	    {
-	      /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB
-		 currently assumes that they are 32 bit.  */
-	      *dstp++ = *srcp++;
-	      *dstp++ = *srcp++;
-	      *dstp++ = *srcp++;
-	      *dstp++ = *srcp++;
-	      if (REGISTER_RAW_SIZE(regno) == 4)
-		{
-		  /* copying 4 bytes from eight bytes?
-		     I don't see how this can be right...  */
-		  srcp += 4;	
-		}
-	      else
-		{
-		  /* copy all 8 bytes (sizeof(double)) */
-		  *dstp++ = *srcp++;
-		  *dstp++ = *srcp++;
-		  *dstp++ = *srcp++;
-		  *dstp++ = *srcp++;
-		}
-	    }
-	  else
-	    {
-	      srcp += 4;
-	      *dstp++ = *srcp++;
-	      *dstp++ = *srcp++;
-	      *dstp++ = *srcp++;
-	      *dstp++ = *srcp++;
-	    }
-	}
-    }
-  else
-    {
-      warning ("wrong size gregset struct in core file");
-      return;
-    }
-
-  registers_fetched ();
-}
-
-/* Irix 5 uses what appears to be a unique form of shared library
-   support.  This is a copy of solib.c modified for Irix 5.  */
-/* FIXME: Most of this code could be merged with osfsolib.c and solib.c
-   by using next_link_map_member and xfer_link_map_member in solib.c.  */
-
-#include <sys/types.h>
-#include <signal.h>
-#include <sys/param.h>
-#include <fcntl.h>
-
-/* <obj.h> includes <sym.h> and <symconst.h>, which causes conflicts
-   with our versions of those files included by tm-mips.h.  Prevent
-   <obj.h> from including them with some appropriate defines.  */
-#define __SYM_H__
-#define __SYMCONST_H__
-#include <obj.h>
-#ifdef HAVE_OBJLIST_H
-#include <objlist.h>
-#endif
-
-#ifdef NEW_OBJ_INFO_MAGIC
-#define HANDLE_NEW_OBJ_LIST
-#endif
-
-#include "symtab.h"
-#include "bfd.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "command.h"
-#include "frame.h"
-#include "gnu-regex.h"
-#include "inferior.h"
-#include "language.h"
-#include "gdbcmd.h"
-
-/* The symbol which starts off the list of shared libraries.  */
-#define DEBUG_BASE "__rld_obj_head"
-
-/* Irix 6.x introduces a new variant of object lists.
-   To be able to debug O32 executables under Irix 6, we have to handle both
-   variants.  */
-
-typedef enum
-{
-  OBJ_LIST_OLD,		/* Pre Irix 6.x object list.  */
-  OBJ_LIST_32,		/* 32 Bit Elf32_Obj_Info.  */
-  OBJ_LIST_64		/* 64 Bit Elf64_Obj_Info, FIXME not yet implemented.  */
-} obj_list_variant;
-
-/* Define our own link_map structure.
-   This will help to share code with osfsolib.c and solib.c.  */
-
-struct link_map {
-  obj_list_variant l_variant;	/* which variant of object list */
-  CORE_ADDR l_lladdr;		/* addr in inferior list was read from */
-  CORE_ADDR l_next;		/* address of next object list entry */
-};
-
-/* Irix 5 shared objects are pre-linked to particular addresses
-   although the dynamic linker may have to relocate them if the
-   address ranges of the libraries used by the main program clash.
-   The offset is the difference between the address where the object
-   is mapped and the binding address of the shared library.  */
-#define LM_OFFSET(so) ((so) -> offset)
-/* Loaded address of shared library.  */
-#define LM_ADDR(so) ((so) -> lmstart)
-
-char shadow_contents[BREAKPOINT_MAX];	/* Stash old bkpt addr contents */
-
-struct so_list {
-  struct so_list *next;			/* next structure in linked list */
-  struct link_map lm;
-  CORE_ADDR offset;			/* prelink to load address offset */
-  char *so_name;			/* shared object lib name */
-  CORE_ADDR lmstart;			/* lower addr bound of mapped object */
-  CORE_ADDR lmend;			/* upper addr bound of mapped object */
-  char symbols_loaded;			/* flag: symbols read in yet? */
-  char from_tty;			/* flag: print msgs? */
-  struct objfile *objfile;		/* objfile for loaded lib */
-  struct section_table *sections;
-  struct section_table *sections_end;
-  struct section_table *textsection;
-  bfd *abfd;
-};
-
-static struct so_list *so_list_head;	/* List of known shared objects */
-static CORE_ADDR debug_base;		/* Base of dynamic linker structures */
-static CORE_ADDR breakpoint_addr;	/* Address where end bkpt is set */
-
-/* Local function prototypes */
-
-static void
-sharedlibrary_command PARAMS ((char *, int));
-
-static int
-enable_break PARAMS ((void));
-
-static int
-disable_break PARAMS ((void));
-
-static void
-info_sharedlibrary_command PARAMS ((char *, int));
-
-static int
-symbol_add_stub PARAMS ((char *));
-
-static struct so_list *
-find_solib PARAMS ((struct so_list *));
-
-static struct link_map *
-first_link_map_member PARAMS ((void));
-
-static struct link_map *
-next_link_map_member PARAMS ((struct so_list *));
-
-static void
-xfer_link_map_member PARAMS ((struct so_list *, struct link_map *));
-
-static CORE_ADDR
-locate_base PARAMS ((void));
-
-static int
-solib_map_sections PARAMS ((char *));
-
-/*
-
-LOCAL FUNCTION
-
-	solib_map_sections -- open bfd and build sections for shared lib
-
-SYNOPSIS
-
-	static int solib_map_sections (struct so_list *so)
-
-DESCRIPTION
-
-	Given a pointer to one of the shared objects in our list
-	of mapped objects, use the recorded name to open a bfd
-	descriptor for the object, build a section table, and then
-	relocate all the section addresses by the base address at
-	which the shared object was mapped.
-
-FIXMES
-
-	In most (all?) cases the shared object file name recorded in the
-	dynamic linkage tables will be a fully qualified pathname.  For
-	cases where it isn't, do we really mimic the systems search
-	mechanism correctly in the below code (particularly the tilde
-	expansion stuff?).
- */
-
-static int
-solib_map_sections (arg)
-     char *arg;
-{
-  struct so_list *so = (struct so_list *) arg;	/* catch_errors bogon */
-  char *filename;
-  char *scratch_pathname;
-  int scratch_chan;
-  struct section_table *p;
-  struct cleanup *old_chain;
-  bfd *abfd;
-  
-  filename = tilde_expand (so -> so_name);
-  old_chain = make_cleanup (free, filename);
-  
-  scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
-			&scratch_pathname);
-  if (scratch_chan < 0)
-    {
-      scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename,
-			    O_RDONLY, 0, &scratch_pathname);
-    }
-  if (scratch_chan < 0)
-    {
-      perror_with_name (filename);
-    }
-  /* Leave scratch_pathname allocated.  abfd->name will point to it.  */
-
-  abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
-  if (!abfd)
-    {
-      close (scratch_chan);
-      error ("Could not open `%s' as an executable file: %s",
-	     scratch_pathname, bfd_errmsg (bfd_get_error ()));
-    }
-  /* Leave bfd open, core_xfer_memory and "info files" need it.  */
-  so -> abfd = abfd;
-  abfd -> cacheable = true;
-
-  if (!bfd_check_format (abfd, bfd_object))
-    {
-      error ("\"%s\": not in executable format: %s.",
-	     scratch_pathname, bfd_errmsg (bfd_get_error ()));
-    }
-  if (build_section_table (abfd, &so -> sections, &so -> sections_end))
-    {
-      error ("Can't find the file sections in `%s': %s", 
-	     bfd_get_filename (exec_bfd), bfd_errmsg (bfd_get_error ()));
-    }
-
-  for (p = so -> sections; p < so -> sections_end; p++)
-    {
-      /* Relocate the section binding addresses as recorded in the shared
-	 object's file by the offset to get the address to which the
-	 object was actually mapped.  */
-      p -> addr += LM_OFFSET (so);
-      p -> endaddr += LM_OFFSET (so);
-      so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend);
-      if (STREQ (p -> the_bfd_section -> name, ".text"))
-	{
-	  so -> textsection = p;
-	}
-    }
-
-  /* Free the file names, close the file now.  */
-  do_cleanups (old_chain);
-
-  return (1);
-}
-
-/*
-
-LOCAL FUNCTION
-
-	locate_base -- locate the base address of dynamic linker structs
-
-SYNOPSIS
-
-	CORE_ADDR locate_base (void)
-
-DESCRIPTION
-
-	For both the SunOS and SVR4 shared library implementations, if the
-	inferior executable has been linked dynamically, there is a single
-	address somewhere in the inferior's data space which is the key to
-	locating all of the dynamic linker's runtime structures.  This
-	address is the value of the symbol defined by the macro DEBUG_BASE.
-	The job of this function is to find and return that address, or to
-	return 0 if there is no such address (the executable is statically
-	linked for example).
-
-	For SunOS, the job is almost trivial, since the dynamic linker and
-	all of it's structures are statically linked to the executable at
-	link time.  Thus the symbol for the address we are looking for has
-	already been added to the minimal symbol table for the executable's
-	objfile at the time the symbol file's symbols were read, and all we
-	have to do is look it up there.  Note that we explicitly do NOT want
-	to find the copies in the shared library.
-
-	The SVR4 version is much more complicated because the dynamic linker
-	and it's structures are located in the shared C library, which gets
-	run as the executable's "interpreter" by the kernel.  We have to go
-	to a lot more work to discover the address of DEBUG_BASE.  Because
-	of this complexity, we cache the value we find and return that value
-	on subsequent invocations.  Note there is no copy in the executable
-	symbol tables.
-
-	Irix 5 is basically like SunOS.
-
-	Note that we can assume nothing about the process state at the time
-	we need to find this address.  We may be stopped on the first instruc-
-	tion of the interpreter (C shared library), the first instruction of
-	the executable itself, or somewhere else entirely (if we attached
-	to the process for example).
-
- */
-
-static CORE_ADDR
-locate_base ()
-{
-  struct minimal_symbol *msymbol;
-  CORE_ADDR address = 0;
-
-  msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile);
-  if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
-    {
-      address = SYMBOL_VALUE_ADDRESS (msymbol);
-    }
-  return (address);
-}
-
-/*
-
-LOCAL FUNCTION
-
-	first_link_map_member -- locate first member in dynamic linker's map
-
-SYNOPSIS
-
-	static struct link_map *first_link_map_member (void)
-
-DESCRIPTION
-
-	Read in a copy of the first member in the inferior's dynamic
-	link map from the inferior's dynamic linker structures, and return
-	a pointer to the link map descriptor.
-*/
-
-static struct link_map *
-first_link_map_member ()
-{
-  struct obj_list *listp;
-  struct obj_list list_old;
-  struct link_map *lm;
-  static struct link_map first_lm;
-  CORE_ADDR lladdr;
-  CORE_ADDR next_lladdr;
-
-  /* We have not already read in the dynamic linking structures
-     from the inferior, lookup the address of the base structure. */
-  debug_base = locate_base ();
-  if (debug_base == 0)
-    return NULL;
-
-  /* Get address of first list entry.  */
-  read_memory (debug_base, (char *) &listp, sizeof (struct obj_list *));
-
-  if (listp == NULL)
-    return NULL;
-
-  /* Get first list entry.  */
-  lladdr = (CORE_ADDR) listp;
-  read_memory (lladdr, (char *) &list_old, sizeof (struct obj_list));
-
-  /* The first entry in the list is the object file we are debugging,
-     so skip it.  */
-  next_lladdr = (CORE_ADDR) list_old.next; 
-
-#ifdef HANDLE_NEW_OBJ_LIST
-  if (list_old.data == NEW_OBJ_INFO_MAGIC)
-    {
-      Elf32_Obj_Info list_32;
-
-      read_memory (lladdr, (char *) &list_32, sizeof (Elf32_Obj_Info));
-      if (list_32.oi_size != sizeof (Elf32_Obj_Info))
-	return NULL;
-      next_lladdr = (CORE_ADDR) list_32.oi_next; 
-    }
-#endif
-
-  if (next_lladdr == 0)
-    return NULL;
-
-  first_lm.l_lladdr = next_lladdr;
-  lm = &first_lm;
-  return lm;
-}
-
-/*
-
-LOCAL FUNCTION
-
-	next_link_map_member -- locate next member in dynamic linker's map
-
-SYNOPSIS
-
-	static struct link_map *next_link_map_member (so_list_ptr)
-
-DESCRIPTION
-
-	Read in a copy of the next member in the inferior's dynamic
-	link map from the inferior's dynamic linker structures, and return
-	a pointer to the link map descriptor.
-*/
-
-static struct link_map *
-next_link_map_member (so_list_ptr)
-     struct so_list *so_list_ptr;
-{
-  struct link_map *lm = &so_list_ptr -> lm;
-  CORE_ADDR next_lladdr = lm -> l_next;
-  static struct link_map next_lm;
-
-  if (next_lladdr == 0)
-    {
-      /* We have hit the end of the list, so check to see if any were
-	 added, but be quiet if we can't read from the target any more. */
-      int status = 0;
-
-      if (lm -> l_variant == OBJ_LIST_OLD)
-	{
-	  struct obj_list list_old;
-
-	  status = target_read_memory (lm -> l_lladdr,
-				       (char *) &list_old,
-				       sizeof (struct obj_list));
-	  next_lladdr = (CORE_ADDR) list_old.next;
-	}
-#ifdef HANDLE_NEW_OBJ_LIST
-      else if (lm -> l_variant == OBJ_LIST_32)
-	{
-	  Elf32_Obj_Info list_32;
-	  status = target_read_memory (lm -> l_lladdr,
-				       (char *) &list_32,
-				       sizeof (Elf32_Obj_Info));
-	  next_lladdr = (CORE_ADDR) list_32.oi_next;
-	}
-#endif
-
-      if (status != 0 || next_lladdr == 0)
-	return NULL;
-    }
-
-  next_lm.l_lladdr = next_lladdr;
-  lm = &next_lm;
-  return lm;
-}
-
-/*
-
-LOCAL FUNCTION
-
-	xfer_link_map_member -- set local variables from dynamic linker's map
-
-SYNOPSIS
-
-	static void xfer_link_map_member (so_list_ptr, lm)
-
-DESCRIPTION
-
-	Read in a copy of the requested member in the inferior's dynamic
-	link map from the inferior's dynamic linker structures, and fill
-	in the necessary so_list_ptr elements.
-*/
-
-static void
-xfer_link_map_member (so_list_ptr, lm)
-     struct so_list *so_list_ptr;
-     struct link_map *lm;
-{
-  struct obj_list list_old;
-  CORE_ADDR lladdr = lm -> l_lladdr;
-  struct link_map *new_lm = &so_list_ptr -> lm;
-  int errcode;
-
-  read_memory (lladdr, (char *) &list_old, sizeof (struct obj_list));
-
-  new_lm -> l_variant = OBJ_LIST_OLD;
-  new_lm -> l_lladdr = lladdr;
-  new_lm -> l_next = (CORE_ADDR) list_old.next; 
-
-#ifdef HANDLE_NEW_OBJ_LIST
-  if (list_old.data == NEW_OBJ_INFO_MAGIC)
-    {
-      Elf32_Obj_Info list_32;
-
-      read_memory (lladdr, (char *) &list_32, sizeof (Elf32_Obj_Info));
-      if (list_32.oi_size != sizeof (Elf32_Obj_Info))
-	return;
-      new_lm -> l_variant = OBJ_LIST_32;
-      new_lm -> l_next = (CORE_ADDR) list_32.oi_next; 
-
-      target_read_string ((CORE_ADDR) list_32.oi_pathname,
-			  &so_list_ptr -> so_name,
-			  list_32.oi_pathname_len + 1, &errcode);
-      if (errcode != 0)
-	memory_error (errcode, (CORE_ADDR) list_32.oi_pathname);
-
-      LM_ADDR (so_list_ptr) = (CORE_ADDR) list_32.oi_ehdr;
-      LM_OFFSET (so_list_ptr) =
-	(CORE_ADDR) list_32.oi_ehdr - (CORE_ADDR) list_32.oi_orig_ehdr;
-    }
-  else
-#endif
-    {
-#if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
-      /* If we are compiling GDB under N32 ABI, the alignments in
-	 the obj struct are different from the O32 ABI and we will get
-	 wrong values when accessing the struct.
-	 As a workaround we use fixed values which are good for
-	 Irix 6.2.  */
-      char buf[432];
-
-      read_memory ((CORE_ADDR) list_old.data, buf, sizeof (buf));
-
-      target_read_string (extract_address (&buf[236], 4),
-			  &so_list_ptr -> so_name,
-			  INT_MAX, &errcode);
-      if (errcode != 0)
-	memory_error (errcode, extract_address (&buf[236], 4));
-
-      LM_ADDR (so_list_ptr) = extract_address (&buf[196], 4);
-      LM_OFFSET (so_list_ptr) =
-	extract_address (&buf[196], 4) - extract_address (&buf[248], 4);
-#else
-      struct obj obj_old;
-
-      read_memory ((CORE_ADDR) list_old.data, (char *) &obj_old,
-		   sizeof (struct obj));
-
-      target_read_string ((CORE_ADDR) obj_old.o_path,
-			  &so_list_ptr -> so_name,
-			  INT_MAX, &errcode);
-      if (errcode != 0)
-	memory_error (errcode, (CORE_ADDR) obj_old.o_path);
-
-      LM_ADDR (so_list_ptr) = (CORE_ADDR) obj_old.o_praw;
-      LM_OFFSET (so_list_ptr) =
-	(CORE_ADDR) obj_old.o_praw - obj_old.o_base_address;
-#endif
-    }
-
-  catch_errors (solib_map_sections, (char *) so_list_ptr,
-		"Error while mapping shared library sections:\n",
-		RETURN_MASK_ALL);
-}
-
-
-/*
-
-LOCAL FUNCTION
-
-	find_solib -- step through list of shared objects
-
-SYNOPSIS
-
-	struct so_list *find_solib (struct so_list *so_list_ptr)
-
-DESCRIPTION
-
-	This module contains the routine which finds the names of any
-	loaded "images" in the current process. The argument in must be
-	NULL on the first call, and then the returned value must be passed
-	in on subsequent calls. This provides the capability to "step" down
-	the list of loaded objects. On the last object, a NULL value is
-	returned.
- */
-
-static struct so_list *
-find_solib (so_list_ptr)
-     struct so_list *so_list_ptr;	/* Last lm or NULL for first one */
-{
-  struct so_list *so_list_next = NULL;
-  struct link_map *lm = NULL;
-  struct so_list *new;
-  
-  if (so_list_ptr == NULL)
-    {
-      /* We are setting up for a new scan through the loaded images. */
-      if ((so_list_next = so_list_head) == NULL)
-	{
-	  /* Find the first link map list member. */
-	  lm = first_link_map_member ();
-	}
-    }
-  else
-    {
-      /* We have been called before, and are in the process of walking
-	 the shared library list.  Advance to the next shared object. */
-      lm = next_link_map_member (so_list_ptr);
-      so_list_next = so_list_ptr -> next;
-    }
-  if ((so_list_next == NULL) && (lm != NULL))
-    {
-      new = (struct so_list *) xmalloc (sizeof (struct so_list));
-      memset ((char *) new, 0, sizeof (struct so_list));
-      /* Add the new node as the next node in the list, or as the root
-	 node if this is the first one. */
-      if (so_list_ptr != NULL)
-	{
-	  so_list_ptr -> next = new;
-	}
-      else
-	{
-	  so_list_head = new;
-	}      
-      so_list_next = new;
-      xfer_link_map_member (new, lm);
-    }
-  return (so_list_next);
-}
-
-/* A small stub to get us past the arg-passing pinhole of catch_errors.  */
-
-static int
-symbol_add_stub (arg)
-     char *arg;
-{
-  register struct so_list *so = (struct so_list *) arg;	/* catch_errs bogon */
-  CORE_ADDR text_addr = 0;
-
-  if (so -> textsection)
-    text_addr = so -> textsection -> addr;
-  else if (so -> abfd != NULL)
-    {
-      asection *lowest_sect;
-
-      /* If we didn't find a mapped non zero sized .text section, set up
-	 text_addr so that the relocation in symbol_file_add does no harm.  */
-
-      lowest_sect = bfd_get_section_by_name (so -> abfd, ".text");
-      if (lowest_sect == NULL)
-	bfd_map_over_sections (so -> abfd, find_lowest_section,
-			       (PTR) &lowest_sect);
-      if (lowest_sect)
-	text_addr = bfd_section_vma (so -> abfd, lowest_sect) + LM_OFFSET (so);
-    }
-  
-  so -> objfile = symbol_file_add (so -> so_name, so -> from_tty,
-				   text_addr,
-				   0, 0, 0, 0, 0);
-  return (1);
-}
-
-/*
-
-GLOBAL FUNCTION
-
-	solib_add -- add a shared library file to the symtab and section list
-
-SYNOPSIS
-
-	void solib_add (char *arg_string, int from_tty,
-			struct target_ops *target)
-
-DESCRIPTION
-
-*/
-
-void
-solib_add (arg_string, from_tty, target)
-     char *arg_string;
-     int from_tty;
-     struct target_ops *target;
-{	
-  register struct so_list *so = NULL;   	/* link map state variable */
-
-  /* Last shared library that we read.  */
-  struct so_list *so_last = NULL;
-
-  char *re_err;
-  int count;
-  int old;
-  
-  if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL)
-    {
-      error ("Invalid regexp: %s", re_err);
-    }
-  
-  /* Add the shared library sections to the section table of the
-     specified target, if any.  */
-  if (target)
-    {
-      /* Count how many new section_table entries there are.  */
-      so = NULL;
-      count = 0;
-      while ((so = find_solib (so)) != NULL)
-	{
-	  if (so -> so_name[0])
-	    {
-	      count += so -> sections_end - so -> sections;
-	    }
-	}
-      
-      if (count)
-	{
-	  int update_coreops;
-
-	  /* We must update the to_sections field in the core_ops structure
-	     here, otherwise we dereference a potential dangling pointer
-	     for each call to target_read/write_memory within this routine.  */
-	  update_coreops = core_ops.to_sections == target->to_sections;
-	     
-	  /* Reallocate the target's section table including the new size.  */
-	  if (target -> to_sections)
-	    {
-	      old = target -> to_sections_end - target -> to_sections;
-	      target -> to_sections = (struct section_table *)
-		xrealloc ((char *)target -> to_sections,
-			 (sizeof (struct section_table)) * (count + old));
-	    }
-	  else
-	    {
-	      old = 0;
-	      target -> to_sections = (struct section_table *)
-		xmalloc ((sizeof (struct section_table)) * count);
-	    }
-	  target -> to_sections_end = target -> to_sections + (count + old);
-	  
-	  /* Update the to_sections field in the core_ops structure
-	     if needed.  */
-	  if (update_coreops)
-	    {
-	      core_ops.to_sections = target->to_sections;
-	      core_ops.to_sections_end = target->to_sections_end;
-	    }
-
-	  /* Add these section table entries to the target's table.  */
-	  while ((so = find_solib (so)) != NULL)
-	    {
-	      if (so -> so_name[0])
-		{
-		  count = so -> sections_end - so -> sections;
-		  memcpy ((char *) (target -> to_sections + old),
-			  so -> sections, 
-			  (sizeof (struct section_table)) * count);
-		  old += count;
-		}
-	    }
-	}
-    }
-  
-  /* Now add the symbol files.  */
-  while ((so = find_solib (so)) != NULL)
-    {
-      if (so -> so_name[0] && re_exec (so -> so_name))
-	{
-	  so -> from_tty = from_tty;
-	  if (so -> symbols_loaded)
-	    {
-	      if (from_tty)
-		{
-		  printf_unfiltered ("Symbols already loaded for %s\n", so -> so_name);
-		}
-	    }
-	  else if (catch_errors
-		   (symbol_add_stub, (char *) so,
-		    "Error while reading shared library symbols:\n",
-		    RETURN_MASK_ALL))
-	    {
-	      so_last = so;
-	      so -> symbols_loaded = 1;
-	    }
-	}
-    }
-
-  /* Getting new symbols may change our opinion about what is
-     frameless.  */
-  if (so_last)
-    reinit_frame_cache ();
-}
-
-/*
-
-LOCAL FUNCTION
-
-	info_sharedlibrary_command -- code for "info sharedlibrary"
-
-SYNOPSIS
-
-	static void info_sharedlibrary_command ()
-
-DESCRIPTION
-
-	Walk through the shared library list and print information
-	about each attached library.
-*/
-
-static void
-info_sharedlibrary_command (ignore, from_tty)
-     char *ignore;
-     int from_tty;
-{
-  register struct so_list *so = NULL;  	/* link map state variable */
-  int header_done = 0;
-  
-  if (exec_bfd == NULL)
-    {
-      printf_unfiltered ("No exec file.\n");
-      return;
-    }
-  while ((so = find_solib (so)) != NULL)
-    {
-      if (so -> so_name[0])
-	{
-	  if (!header_done)
-	    {
-	      printf_unfiltered("%-12s%-12s%-12s%s\n", "From", "To", "Syms Read",
-		     "Shared Object Library");
-	      header_done++;
-	    }
-	  printf_unfiltered ("%-12s",
-		  local_hex_string_custom ((unsigned long) LM_ADDR (so),
-					   "08l"));
-	  printf_unfiltered ("%-12s",
-		  local_hex_string_custom ((unsigned long) so -> lmend,
-					   "08l"));
-	  printf_unfiltered ("%-12s", so -> symbols_loaded ? "Yes" : "No");
-	  printf_unfiltered ("%s\n",  so -> so_name);
-	}
-    }
-  if (so_list_head == NULL)
-    {
-      printf_unfiltered ("No shared libraries loaded at this time.\n");	
-    }
-}
-
-/*
-
-GLOBAL FUNCTION
-
-	solib_address -- check to see if an address is in a shared lib
-
-SYNOPSIS
-
-	char *solib_address (CORE_ADDR address)
-
-DESCRIPTION
-
-	Provides a hook for other gdb routines to discover whether or
-	not a particular address is within the mapped address space of
-	a shared library.  Any address between the base mapping address
-	and the first address beyond the end of the last mapping, is
-	considered to be within the shared library address space, for
-	our purposes.
-
-	For example, this routine is called at one point to disable
-	breakpoints which are in shared libraries that are not currently
-	mapped in.
- */
-
-char *
-solib_address (address)
-     CORE_ADDR address;
-{
-  register struct so_list *so = 0;   	/* link map state variable */
-  
-  while ((so = find_solib (so)) != NULL)
-    {
-      if (so -> so_name[0])
-	{
-	  if ((address >= (CORE_ADDR) LM_ADDR (so)) &&
-	      (address < (CORE_ADDR) so -> lmend))
-	    return (so->so_name);
-	}
-    }
-  return (0);
-}
-
-/* Called by free_all_symtabs */
-
-void 
-clear_solib()
-{
-  struct so_list *next;
-  char *bfd_filename;
-  
-  disable_breakpoints_in_shlibs (1);
-
-  while (so_list_head)
-    {
-      if (so_list_head -> sections)
-	{
-	  free ((PTR)so_list_head -> sections);
-	}
-      if (so_list_head -> abfd)
-	{
-	  bfd_filename = bfd_get_filename (so_list_head -> abfd);
-	  if (!bfd_close (so_list_head -> abfd))
-	    warning ("cannot close \"%s\": %s",
-		     bfd_filename, bfd_errmsg (bfd_get_error ()));
-	}
-      else
-	/* This happens for the executable on SVR4.  */
-	bfd_filename = NULL;
-
-      next = so_list_head -> next;
-      if (bfd_filename)
-	free ((PTR)bfd_filename);
-      free (so_list_head->so_name);
-      free ((PTR)so_list_head);
-      so_list_head = next;
-    }
-  debug_base = 0;
-}
-
-/*
-
-LOCAL FUNCTION
-
-	disable_break -- remove the "mapping changed" breakpoint
-
-SYNOPSIS
-
-	static int disable_break ()
-
-DESCRIPTION
-
-	Removes the breakpoint that gets hit when the dynamic linker
-	completes a mapping change.
-
-*/
-
-static int
-disable_break ()
-{
-  int status = 1;
-
-
-  /* Note that breakpoint address and original contents are in our address
-     space, so we just need to write the original contents back. */
-
-  if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0)
-    {
-      status = 0;
-    }
-
-  /* For the SVR4 version, we always know the breakpoint address.  For the
-     SunOS version we don't know it until the above code is executed.
-     Grumble if we are stopped anywhere besides the breakpoint address. */
-
-  if (stop_pc != breakpoint_addr)
-    {
-      warning ("stopped at unknown breakpoint while handling shared libraries");
-    }
-
-  return (status);
-}
-
-/*
-
-LOCAL FUNCTION
-
-	enable_break -- arrange for dynamic linker to hit breakpoint
-
-SYNOPSIS
-
-	int enable_break (void)
-
-DESCRIPTION
-
-	This functions inserts a breakpoint at the entry point of the
-	main executable, where all shared libraries are mapped in.
-*/
-
-static int
-enable_break ()
-{
-  if (symfile_objfile != NULL
-      && target_insert_breakpoint (symfile_objfile->ei.entry_point,
-				   shadow_contents) == 0)
-    {
-      breakpoint_addr = symfile_objfile->ei.entry_point;
-      return 1;
-    }
-
-  return 0;
-}
-  
-/*
-  
-GLOBAL FUNCTION
-  
-	solib_create_inferior_hook -- shared library startup support
-  
-SYNOPSIS
-  
-	void solib_create_inferior_hook()
-  
-DESCRIPTION
-  
-	When gdb starts up the inferior, it nurses it along (through the
-	shell) until it is ready to execute it's first instruction.  At this
-	point, this function gets called via expansion of the macro
-	SOLIB_CREATE_INFERIOR_HOOK.
-
-	For SunOS executables, this first instruction is typically the
-	one at "_start", or a similar text label, regardless of whether
-	the executable is statically or dynamically linked.  The runtime
-	startup code takes care of dynamically linking in any shared
-	libraries, once gdb allows the inferior to continue.
-
-	For SVR4 executables, this first instruction is either the first
-	instruction in the dynamic linker (for dynamically linked
-	executables) or the instruction at "start" for statically linked
-	executables.  For dynamically linked executables, the system
-	first exec's /lib/libc.so.N, which contains the dynamic linker,
-	and starts it running.  The dynamic linker maps in any needed
-	shared libraries, maps in the actual user executable, and then
-	jumps to "start" in the user executable.
-
-	For both SunOS shared libraries, and SVR4 shared libraries, we
-	can arrange to cooperate with the dynamic linker to discover the
-	names of shared libraries that are dynamically linked, and the
-	base addresses to which they are linked.
-
-	This function is responsible for discovering those names and
-	addresses, and saving sufficient information about them to allow
-	their symbols to be read at a later time.
-
-FIXME
-
-	Between enable_break() and disable_break(), this code does not
-	properly handle hitting breakpoints which the user might have
-	set in the startup code or in the dynamic linker itself.  Proper
-	handling will probably have to wait until the implementation is
-	changed to use the "breakpoint handler function" method.
-
-	Also, what if child has exit()ed?  Must exit loop somehow.
-  */
-
-void 
-solib_create_inferior_hook()
-{
-  if (!enable_break ())
-    {
-      warning ("shared library handler failed to enable breakpoint");
-      return;
-    }
-
-  /* Now run the target.  It will eventually hit the breakpoint, at
-     which point all of the libraries will have been mapped in and we
-     can go groveling around in the dynamic linker structures to find
-     out what we need to know about them. */
-
-  clear_proceed_status ();
-  stop_soon_quietly = 1;
-  stop_signal = TARGET_SIGNAL_0;
-  do
-    {
-      target_resume (-1, 0, stop_signal);
-      wait_for_inferior ();
-    }
-  while (stop_signal != TARGET_SIGNAL_TRAP);
-  
-  /* We are now either at the "mapping complete" breakpoint (or somewhere
-     else, a condition we aren't prepared to deal with anyway), so adjust
-     the PC as necessary after a breakpoint, disable the breakpoint, and
-     add any shared libraries that were mapped in. */
-
-  if (DECR_PC_AFTER_BREAK)
-    {
-      stop_pc -= DECR_PC_AFTER_BREAK;
-      write_register (PC_REGNUM, stop_pc);
-    }
-
-  if (!disable_break ())
-    {
-      warning ("shared library handler failed to disable breakpoint");
-    }
-
-  /*  solib_add will call reinit_frame_cache.
-      But we are stopped in the startup code and we might not have symbols
-      for the startup code, so heuristic_proc_start could be called
-      and will put out an annoying warning.
-      Delaying the resetting of stop_soon_quietly until after symbol loading
-      suppresses the warning.  */
-  if (auto_solib_add)
-    solib_add ((char *) 0, 0, (struct target_ops *) 0);
-  stop_soon_quietly = 0;
-}
-
-/*
-
-LOCAL FUNCTION
-
-	sharedlibrary_command -- handle command to explicitly add library
-
-SYNOPSIS
-
-	static void sharedlibrary_command (char *args, int from_tty)
-
-DESCRIPTION
-
-*/
-
-static void
-sharedlibrary_command (args, from_tty)
-char *args;
-int from_tty;
-{
-  dont_repeat ();
-  solib_add (args, from_tty, (struct target_ops *) 0);
-}
-
-void
-_initialize_solib()
-{
-  add_com ("sharedlibrary", class_files, sharedlibrary_command,
-	   "Load shared object library symbols for files matching REGEXP.");
-  add_info ("sharedlibrary", info_sharedlibrary_command, 
-	    "Status of loaded shared object libraries.");
-
-  add_show_from_set
-    (add_set_cmd ("auto-solib-add", class_support, var_zinteger,
-		  (char *) &auto_solib_add,
-		  "Set autoloading of shared library symbols.\n\
-If nonzero, symbols from all shared object libraries will be loaded\n\
-automatically when the inferior begins execution or when the dynamic linker\n\
-informs gdb that a new library has been loaded.  Otherwise, symbols\n\
-must be loaded manually, using `sharedlibrary'.",
-		  &setlist),
-     &showlist);
-}
-
-
-/* Register that we are able to handle irix5 core file formats.
-   This really is bfd_target_unknown_flavour */
-
-static struct core_fns irix5_core_fns =
-{
-  bfd_target_unknown_flavour,
-  fetch_core_registers,
-  NULL
-};
-
-void
-_initialize_core_irix5 ()
-{
-  add_core_fns (&irix5_core_fns);
-}