Initial creation of sourceware repository

1 files changed, 0 insertions, 966 deletions

diff --git a/gdb/convex-xdep.c b/gdb/convex-xdep.c
deleted file mode 100644
index 8bfc0d8..0000000
--- a/gdb/convex-xdep.c
+++ /dev/null
@@ -1,966 +0,0 @@
-/* Convex host-dependent code for GDB.
-   Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
-
-#include "defs.h"
-#include "command.h"
-#include "symtab.h"
-#include "value.h"
-#include "frame.h"
-#include "inferior.h"
-#include "wait.h"
-
-#include <signal.h>
-#include <fcntl.h>
-#include "gdbcore.h"
-
-#include <sys/param.h>
-#include <sys/dir.h>
-#include <sys/user.h>
-#include <sys/ioctl.h>
-#include <sys/pcntl.h>
-#include <sys/thread.h>
-#include <sys/proc.h>
-#include <sys/file.h>
-#include "gdb_stat.h"
-#include <sys/mman.h>
-
-#include <convex/vmparam.h>
-#include <convex/filehdr.h>
-#include <convex/opthdr.h>
-#include <convex/scnhdr.h>
-#include <convex/core.h>
-
-/* Per-thread data, read from the inferior at each stop and written
-   back at each resume.  */
-
-/* Number of active threads.
-   Tables are valid for thread numbers less than this.  */
-
-static int n_threads;
-
-#define MAXTHREADS 8
-		
-/* Thread state.  The remaining data is valid only if this is PI_TALIVE.  */
-
-static int thread_state[MAXTHREADS];
-
-/* Stop pc, signal, signal subcode */
-
-static int thread_pc[MAXTHREADS];
-static int thread_signal[MAXTHREADS];
-static int thread_sigcode[MAXTHREADS];	
-
-/* Thread registers.
-   If thread is selected, the regs are in registers[] instead.  */
-
-static char thread_regs[MAXTHREADS][REGISTER_BYTES];
-
-/* 1 if the top frame on the thread's stack was a context frame,
-   meaning that the kernel is up to something and we should not
-   touch the thread at all except to resume it.  */
-
-static char thread_is_in_kernel[MAXTHREADS];
-
-/* The currently selected thread's number.  */
-
-static int inferior_thread;
-
-/* Inferior process's file handle and a process control block
-   to feed args to ioctl with.  */
-
-static int inferior_fd;
-static struct pcntl ps;
-
-/* SOFF file headers for exec or core file.  */
-
-static FILEHDR filehdr;
-static OPTHDR opthdr;
-static SCNHDR scnhdr;
-
-/* Address maps constructed from section headers of exec and core files.
-   Defines process address -> file address translation.  */
-
-struct pmap 
-{
-    long mem_addr;		/* process start address */
-    long mem_end;		/* process end+1 address */
-    long file_addr;		/* file start address */
-    long thread;		/* -1 shared; 0,1,... thread-local */
-    long type;			/* S_TEXT S_DATA S_BSS S_TBSS etc */
-    long which;			/* used to sort map for info files */
-};
-
-static int n_exec, n_core;
-static struct pmap exec_map[100];
-static struct pmap core_map[100];
-
-/* Offsets in the core file of core_context and core_tcontext blocks.  */
-
-static int context_offset;
-static int tcontext_offset[MAXTHREADS];
-
-/* Core file control blocks.  */
-
-static struct core_context_v70 c;
-static struct core_tcontext_v70 tc;
-static struct user u;
-static thread_t th;
-static proc_t pr;
-
-/* The registers of the currently selected thread.  */
-
-extern char registers[REGISTER_BYTES];
-
-/* Vector and communication registers from core dump or from inferior.
-   These are read on demand, ie, not normally valid.  */
-
-static struct vecst vector_registers;
-static struct creg_ctx comm_registers;
-
-/* Flag, set on a vanilla CONT command and cleared when the inferior
-   is continued.  */
-
-static int all_continue;
-
-/* Flag, set when the inferior is continued by a vanilla CONT command,
-   cleared if it is continued for any other purpose.  */
-
-static int thread_switch_ok;
-
-/* Stack of signals recieved from threads but not yet delivered to gdb.  */
-
-struct threadpid 
-{
-    int pid;
-    int thread;
-    int signo;
-    int subsig;
-    int pc;
-};
-
-static struct threadpid signal_stack_bot[100];
-static struct threadpid *signal_stack = signal_stack_bot;
-
-/* How to detect empty stack -- bottom frame is all zero.  */
-
-#define signal_stack_is_empty() (signal_stack->pid == 0)
-
-/* Mode controlled by SET PIPE command, controls the psw SEQ bit
-   which forces each instruction to complete before the next one starts.  */
-
-static int sequential = 0;
-
-/* Mode controlled by the SET PARALLEL command.  Values are:
-   0  concurrency limit 1 thread, dynamic scheduling
-   1  no concurrency limit, dynamic scheduling
-   2  no concurrency limit, fixed scheduling  */
-
-static int parallel = 1;
-
-/* Mode controlled by SET BASE command, output radix for unformatted
-   integer typeout, as in argument lists, aggregates, and so on.
-   Zero means guess whether it's an address (hex) or not (decimal).  */
-
-static int output_radix = 0;
-
-/* Signal subcode at last thread stop.  */
-
-static int stop_sigcode;
-
-/* Hack, see wait() below.  */
-
-static int exec_trap_timer;
-
-#include "gdbcmd.h"
-
-static struct type *vector_type ();
-static long *read_vector_register ();
-static long *read_vector_register_1 ();
-static void write_vector_register ();
-static ULONGEST read_comm_register ();
-static void write_comm_register ();
-static void convex_cont_command ();
-static void thread_continue ();
-static void select_thread ();
-static void scan_stack ();
-static void set_fixed_scheduling ();
-static char *subsig_name ();
-static void psw_info ();
-static sig_noop ();
-static ptr_cmp ();
-
-
-/* Execute ptrace.  Convex V7 replaced ptrace with pattach.
-   Allow ptrace (0) as a no-op.  */
-
-int
-call_ptrace (request, pid, procaddr, buf)
-     int request, pid;
-     PTRACE_ARG3_TYPE procaddr;
-     int buf;
-{
-  if (request == 0)
-    return;
-  error ("no ptrace");
-}
-
-/* Replacement for system execle routine.
-   Convert it to an equivalent exect, which pattach insists on.  */
-
-execle (name, argv)
-     char *name, *argv;
-{
-  char ***envp = (char ***) &argv;
-  while (*envp++) ;
-
-  signal (SIGTRAP, sig_noop);
-  exect (name, &argv, *envp);
-}
-
-/* Stupid handler for stupid trace trap that otherwise causes
-   startup to stupidly hang.  */
-
-static sig_noop () 
-{}
-
-/* Read registers from inferior into registers[] array.
-   For convex, they are already there, read in when the inferior stops.  */
-
-void
-fetch_inferior_registers (regno)
-     int regno;
-{
-}
-
-/* Store our register values back into the inferior.
-   For Convex, do this only once, right before resuming inferior.  */
-
-void
-store_inferior_registers (regno)
-     int regno;
-{
-}
-
-/* Copy LEN bytes from inferior's memory starting at MEMADDR
-   to debugger memory starting at MYADDR. 
-   On failure (cannot read from inferior, usually because address is out
-   of bounds) returns the value of errno. */
-
-int
-read_inferior_memory (memaddr, myaddr, len)
-     CORE_ADDR memaddr;
-     char *myaddr;
-     int len;
-{
-  errno = 0;
-  while (len > 0)
-    {
-      /* little-known undocumented max request size */
-      int i = (len < 12288) ? len : 12288;
-
-      lseek (inferior_fd, memaddr, 0);
-      read (inferior_fd, myaddr, i);
-
-      memaddr += i;
-      myaddr += i;
-      len -= i;
-    }
-  if (errno) 
-    memset (myaddr, '\0', len);
-  return errno;
-}
-
-/* Copy LEN bytes of data from debugger memory at MYADDR
-   to inferior's memory at MEMADDR.
-   Returns errno on failure (cannot write the inferior) */
-
-int
-write_inferior_memory (memaddr, myaddr, len)
-     CORE_ADDR memaddr;
-     char *myaddr;
-     int len;
-{
-  errno = 0;
-  lseek (inferior_fd, memaddr, 0);
-  write (inferior_fd, myaddr, len);
-  return errno;
-}
-
-/* Here from create_inferior when the inferior process has been created
-   and started up.  We must do a pattach to grab it for debugging.
-
-   Also, intercept the CONT command by altering its dispatch address.  */
-/* FIXME: This used to be called from a macro CREATE_INFERIOR_HOOK.
-   But now init_trace_fun is in the same place.  So re-write this to
-   use the init_trace_fun (making convex a debugging target).  */
-
-create_inferior_hook (pid)
-    int pid;
-{
-  static char cont[] = "cont";
-  static char cont1[] = "c";
-  char *linep = cont;
-  char *linep1 = cont1;
-  char **line = &linep;
-  char **line1 = &linep1;
-  struct cmd_list_element *c;
-
-  c = lookup_cmd (line, cmdlist, "", 0);
-  c->function = convex_cont_command;
-  c = lookup_cmd (line1, cmdlist, "", 0);
-  c->function = convex_cont_command;
-
-  inferior_fd = pattach (pid, O_EXCL);
-  if (inferior_fd < 0)
-    perror_with_name ("pattach");
-  inferior_thread = 0;
-  set_fixed_scheduling (pid, parallel == 2);
-}
-
-/* Attach process PID for debugging.  */
-
-attach (pid)
-    int pid;
-{
-  int fd = pattach (pid, O_EXCL);
-  if (fd < 0)
-    perror_with_name ("pattach");
-  attach_flag = 1;
-  /* wait for strange kernel reverberations to go away */
-  sleep (1);
-
-  setpgrp (pid, pid);
-
-  inferior_fd = fd;
-  inferior_thread = 0;
-  return pid;
-}
-
-/* Stop debugging the process whose number is PID
-   and continue it with signal number SIGNAL.
-   SIGNAL = 0 means just continue it.  */
-
-void
-detach (signal)
-     int signal;
-{
-  signal_stack = signal_stack_bot;
-  thread_continue (-1, 0, signal);
-  ioctl (inferior_fd, PIXDETACH, &ps);
-  close (inferior_fd);
-  inferior_fd = 0;
-  attach_flag = 0;
-}
-
-/* Kill off the inferior process.  */
-
-kill_inferior ()
-{
-  if (inferior_pid == 0)
-    return;
-  ioctl (inferior_fd, PIXTERMINATE, 0);
-  wait (0);
-  target_mourn_inferior ();
-}
-
-/* Read vector register REG, and return a pointer to the value.  */
-
-static long *
-read_vector_register (reg)
-    int reg;
-{
-  if (have_inferior_p ())
-    {
-      errno = 0;
-      ps.pi_buffer = (char *) &vector_registers;
-      ps.pi_nbytes = sizeof vector_registers;
-      ps.pi_offset = 0;
-      ps.pi_thread = inferior_thread;
-      ioctl (inferior_fd, PIXRDVREGS, &ps);
-      if (errno)
-	memset (&vector_registers, '\0', sizeof vector_registers);
-    }
-  else if (corechan >= 0)
-    {
-      lseek (corechan, tcontext_offset[inferior_thread], 0);
-      if (myread (corechan, &tc, sizeof tc) < 0)
-	perror_with_name (corefile);
-      lseek (corechan, tc.core_thread_p, 0);
-      if (myread (corechan, &th, sizeof th) < 0)
-	perror_with_name (corefile);
-      lseek (corechan, tc.core_vregs_p, 0);
-      if (myread (corechan, &vector_registers, 16*128) < 0)
-	perror_with_name (corefile);
-      vector_registers.vm[0] = th.t_vect_ctx.vc_vm[0];
-      vector_registers.vm[1] = th.t_vect_ctx.vc_vm[1];
-      vector_registers.vls = th.t_vect_ctx.vc_vls;
-    }
-
-  return read_vector_register_1 (reg);
-}
-
-/* Return a pointer to vector register REG, which must already have been
-   fetched from the inferior or core file.  */
-
-static long *
-read_vector_register_1 (reg) 
-    int reg;
-{
-  switch (reg)
-    {
-    case VM_REGNUM:
-      return (long *) vector_registers.vm;
-    case VS_REGNUM:
-      return (long *) &vector_registers.vls;
-    case VL_REGNUM:
-      return 1 + (long *) &vector_registers.vls;
-    default:
-      return (long *) &vector_registers.vr[reg];
-    }
-}
-
-/* Write vector register REG, element ELEMENT, new value VAL.
-   NB: must use read-modify-write on the entire vector state,
-   since pattach does not do offsetted writes correctly.  */
-
-static void
-write_vector_register (reg, element, val)
-    int reg, element;
-    ULONGEST val;
-{
-  if (have_inferior_p ())
-    {
-      errno = 0;
-      ps.pi_thread = inferior_thread;
-      ps.pi_offset = 0;
-      ps.pi_buffer = (char *) &vector_registers;
-      ps.pi_nbytes = sizeof vector_registers;
-
-      ioctl (inferior_fd, PIXRDVREGS, &ps);
-
-      switch (reg)
-	{
-	case VL_REGNUM:
-	  vector_registers.vls =
-	    (vector_registers.vls & 0xffffffff00000000LL)
-	      + (unsigned long) val;
-	  break;
-
-	case VS_REGNUM:
-	  vector_registers.vls =
-	    (val << 32) + (unsigned long) vector_registers.vls;
-	  break;
-	    
-	default:
-	  vector_registers.vr[reg].el[element] = val;
-	  break;
-	}
-
-      ioctl (inferior_fd, PIXWRVREGS, &ps);
-
-      if (errno)
-	perror_with_name ("writing vector register");
-    }
-}
-
-/* Return the contents of communication register NUM.  */ 
-
-static ULONGEST 
-read_comm_register (num)
-     int num;
-{
-  if (have_inferior_p ())
-    {
-      ps.pi_buffer = (char *) &comm_registers;
-      ps.pi_nbytes = sizeof comm_registers;
-      ps.pi_offset = 0;
-      ps.pi_thread = inferior_thread;
-      ioctl (inferior_fd, PIXRDCREGS, &ps);
-    }
-  return comm_registers.crreg.r4[num];
-}
-
-/* Store a new value VAL into communication register NUM.  
-   NB: Must use read-modify-write on the whole comm register set
-   since pattach does not do offsetted writes correctly.  */
-
-static void
-write_comm_register (num, val)
-     int num;
-     ULONGEST val;
-{
-  if (have_inferior_p ())
-    {
-      ps.pi_buffer = (char *) &comm_registers;
-      ps.pi_nbytes = sizeof comm_registers;
-      ps.pi_offset = 0;
-      ps.pi_thread = inferior_thread;
-      ioctl (inferior_fd, PIXRDCREGS, &ps);
-      comm_registers.crreg.r4[num] = val;
-      ioctl (inferior_fd, PIXWRCREGS, &ps);
-    }
-}
-
-/* Resume execution of the inferior process.
-   If STEP is nonzero, single-step it.
-   If SIGNAL is nonzero, give it that signal.  */
-
-void
-resume (step, signal)
-     int step;
-     int signal;
-{
-  errno = 0;
-  if (step || signal)
-    thread_continue (inferior_thread, step, signal);
-  else
-    thread_continue (-1, 0, 0);
-}
-
-/* Maybe resume some threads.
-   THREAD is which thread to resume, or -1 to resume them all.
-   STEP and SIGNAL are as in resume.
-
-   Global variable ALL_CONTINUE is set when we are here to do a
-   `cont' command; otherwise we may be doing `finish' or a call or
-   something else that will not tolerate an automatic thread switch.
-
-   If there are stopped threads waiting to deliver signals, and
-   ALL_CONTINUE, do not actually resume anything.  gdb will do a wait
-   and see one of the stopped threads in the queue.  */
-
-static void
-thread_continue (thread, step, signal)
-     int thread, step, signal;
-{
-  int n;
-
-  /* If we are to continue all threads, but not for the CONTINUE command,
-     pay no attention and continue only the selected thread.  */
-
-  if (thread < 0 && ! all_continue)
-    thread = inferior_thread;
-
-  /* If we are not stepping, we have now executed the continue part
-     of a CONTINUE command.  */
-
-  if (! step)
-    all_continue = 0;
-
-  /* Allow wait() to switch threads if this is an all-out continue.  */
-
-  thread_switch_ok = thread < 0;
-
-  /* If there are threads queued up, don't resume.  */
-
-  if (thread_switch_ok && ! signal_stack_is_empty ())
-    return;
-
-  /* OK, do it.  */
-
-  for (n = 0; n < n_threads; n++)
-    if (thread_state[n] == PI_TALIVE)
-      {
-	select_thread (n);
-
-	if ((thread < 0 || n == thread) && ! thread_is_in_kernel[n])
-	  {
-	    /* Blam the trace bits in the stack's saved psws to match 
-	       the desired step mode.  This is required so that
-	       single-stepping a return doesn't restore a psw with a
-	       clear trace bit and fly away, and conversely,
-	       proceeding through a return in a routine that was
-	       stepped into doesn't cause a phantom break by restoring
-	       a psw with the trace bit set. */
-	    scan_stack (PSW_T_BIT, step);
-	    scan_stack (PSW_S_BIT, sequential);
-	  }
-
-	ps.pi_buffer = registers;
-	ps.pi_nbytes = REGISTER_BYTES;
-	ps.pi_offset = 0;
-	ps.pi_thread = n;
-	if (! thread_is_in_kernel[n])
-	  if (ioctl (inferior_fd, PIXWRREGS, &ps))
-	    perror_with_name ("PIXWRREGS");
-
-	if (thread < 0 || n == thread)
-	  {
-	    ps.pi_pc = 1;
-	    ps.pi_signo = signal;
-	    if (ioctl (inferior_fd, step ? PIXSTEP : PIXCONTINUE, &ps) < 0)
-	      perror_with_name ("PIXCONTINUE");
-	  }
-      }
-
-  if (ioctl (inferior_fd, PIXRUN, &ps) < 0)
-    perror_with_name ("PIXRUN");
-}
-
-/* Replacement for system wait routine.  
-
-   The system wait returns with one or more threads stopped by
-   signals.  Put stopped threads on a stack and return them one by
-   one, so that it appears that wait returns one thread at a time.
-
-   Global variable THREAD_SWITCH_OK is set when gdb can tolerate wait
-   returning a new thread.  If it is false, then only one thread is
-   running; we will do a real wait, the thread will do something, and
-   we will return that.  */
-
-pid_t
-wait (w)
-    union wait *w;
-{
-  int pid;
-
-  if (!w)
-    return wait3 (0, 0, 0);
-
-  /* Do a real wait if we were told to, or if there are no queued threads.  */
-
-  if (! thread_switch_ok || signal_stack_is_empty ())
-    {
-      int thread;
-
-      pid = wait3 (w, 0, 0);
-
-      if (!WIFSTOPPED (*w) || pid != inferior_pid)
-	return pid;
-
-      /* The inferior has done something and stopped.  Read in all the
-	 threads' registers, and queue up any signals that happened.  */
-
-      if (ioctl (inferior_fd, PIXGETTHCOUNT, &ps) < 0)
-	perror_with_name ("PIXGETTHCOUNT");
-      
-      n_threads = ps.pi_othdcnt;
-      for (thread = 0; thread < n_threads; thread++)
-	{
-	  ps.pi_thread = thread;
-	  if (ioctl (inferior_fd, PIXGETSUBCODE, &ps) < 0)
-	    perror_with_name ("PIXGETSUBCODE");
-	  thread_state[thread] = ps.pi_otstate;
-
-	  if (ps.pi_otstate == PI_TALIVE)
-	    {
-	      select_thread (thread);
-	      ps.pi_buffer = registers;
-	      ps.pi_nbytes = REGISTER_BYTES;
-	      ps.pi_offset = 0;
-	      ps.pi_thread = thread;
-	      if (ioctl (inferior_fd, PIXRDREGS, &ps) < 0)
-		perror_with_name ("PIXRDREGS");
-
-	      registers_fetched ();
-
-	      thread_pc[thread] = read_pc ();
-	      thread_signal[thread] = ps.pi_osigno;
-	      thread_sigcode[thread] = ps.pi_osigcode;
-
-	      /* If the thread's stack has a context frame
-		 on top, something fucked is going on.  I do not
-		 know what, but do I know this: the only thing you
-		 can do with such a thread is continue it.  */
-
-	      thread_is_in_kernel[thread] = 
-		((read_register (PS_REGNUM) >> 25) & 3) == 0;
-
-	      /* Signals push an extended frame and then fault
-		 with a ridiculous pc.  Pop the frame.  */
-
-	      if (thread_pc[thread] > STACK_END_ADDR)
-		{
-		  POP_FRAME;
-		  if (is_break_pc (thread_pc[thread]))
-		    thread_pc[thread] = read_pc () - 2;
-		  else
-		    thread_pc[thread] = read_pc ();
-		  write_register (PC_REGNUM, thread_pc[thread]);
-		}
-	      
-	      if (ps.pi_osigno || ps.pi_osigcode)
-		{
-		  signal_stack++;
-		  signal_stack->pid = pid;
-		  signal_stack->thread = thread;
-		  signal_stack->signo = thread_signal[thread];
-		  signal_stack->subsig = thread_sigcode[thread];
-		  signal_stack->pc = thread_pc[thread];
-		}
-
-	      /* The following hackery is caused by a unix 7.1 feature:
-		 the inferior's fixed scheduling mode is cleared when
-		 it execs the shell (since the shell is not a parallel
-		 program).  So, note the 5.4 trap we get when
-		 the shell does its exec, then catch the 5.0 trap 
-		 that occurs when the debuggee starts, and set fixed
-		 scheduling mode properly.  */
-
-	      if (ps.pi_osigno == 5 && ps.pi_osigcode == 4)
-		exec_trap_timer = 1;
-	      else
-		exec_trap_timer--;
-	      
-	      if (ps.pi_osigno == 5 && exec_trap_timer == 0)
-		set_fixed_scheduling (pid, parallel == 2);
-	    }
-	}
-
-      if (signal_stack_is_empty ())
-	error ("no active threads?!");
-    }
-
-  /* Select the thread that stopped, and return *w saying why.  */
-
-  select_thread (signal_stack->thread);
-
- FIXME: need to convert from host sig.
-  stop_signal = signal_stack->signo;
-  stop_sigcode = signal_stack->subsig;
-
-  WSETSTOP (*w, signal_stack->signo);
-  w->w_thread = signal_stack->thread;
-  return (signal_stack--)->pid;
-}
-
-/* Select thread THREAD -- its registers, stack, per-thread memory.
-   This is the only routine that may assign to inferior_thread
-   or thread_regs[].  */
-
-static void
-select_thread (thread)
-     int thread;
-{
-  if (thread == inferior_thread)
-    return;
-
-  memcpy (thread_regs[inferior_thread], registers, REGISTER_BYTES);
-  ps.pi_thread = inferior_thread = thread;
-  if (have_inferior_p ())
-    ioctl (inferior_fd, PISETRWTID, &ps);
-  memcpy (registers, thread_regs[thread], REGISTER_BYTES);
-}
-  
-/* Routine to set or clear a psw bit in the psw and also all psws
-   saved on the stack.  Quits when we get to a frame in which the
-   saved psw is correct. */
-
-static void
-scan_stack (bit, val)
-    long bit, val;
-{
-  long ps = read_register (PS_REGNUM);
-  long fp;
-  if (val ? !(ps & bit) : (ps & bit))
-    {    
-      ps ^= bit;
-      write_register (PS_REGNUM, ps);
-
-      fp = read_register (FP_REGNUM);
-      while (fp & 0x80000000)
-	{
-	  ps = read_memory_integer (fp + 4, 4);
-	  if (val ? (ps & bit) : !(ps & bit))
-	    break;
-	  ps ^= bit;
-	  write_memory (fp + 4, &ps, 4);
-	  fp = read_memory_integer (fp + 8, 4);
-	}
-    }
-}
-
-/* Set fixed scheduling (alliant mode) of process PID to ARG (0 or 1).  */
-
-static void
-set_fixed_scheduling (pid, arg)
-      int arg;
-{
-  struct pattributes pattr;
-  getpattr (pid, &pattr);
-  pattr.pattr_pfixed = arg;
-  setpattr (pid, &pattr);
-}
-
-void
-core_file_command (filename, from_tty)
-     char *filename;
-     int from_tty;
-{
-  int n;
-
-  /* Discard all vestiges of any previous core file
-     and mark data and stack spaces as empty.  */
-
-  if (corefile)
-    free (corefile);
-  corefile = 0;
-
-  if (corechan >= 0)
-    close (corechan);
-  corechan = -1;
-
-  data_start = 0;
-  data_end = 0;
-  stack_start = STACK_END_ADDR;
-  stack_end = STACK_END_ADDR;
-  n_core = 0;
-
-  /* Now, if a new core file was specified, open it and digest it.  */
-
-  if (filename)
-    {
-      filename = tilde_expand (filename);
-      make_cleanup (free, filename);
-      
-      if (have_inferior_p ())
-	error ("To look at a core file, you must kill the program with \"kill\".");
-      corechan = open (filename, O_RDONLY, 0);
-      if (corechan < 0)
-	perror_with_name (filename);
-
-      if (myread (corechan, &filehdr, sizeof filehdr) < 0)
-	perror_with_name (filename);
-
-      if (!IS_CORE_SOFF_MAGIC (filehdr.h_magic))
-	error ("%s: not a core file.\n", filename);
-
-      if (myread (corechan, &opthdr, filehdr.h_opthdr) < 0)
-	perror_with_name (filename);
-
-      /* Read through the section headers.
-	 For text, data, etc, record an entry in the core file map.
-	 For context and tcontext, record the file address of
-	 the context blocks.  */
-
-      lseek (corechan, (long) filehdr.h_scnptr, 0);
-
-      n_threads = 0;
-      for (n = 0; n < filehdr.h_nscns; n++)
-	{
-	  if (myread (corechan, &scnhdr, sizeof scnhdr) < 0)
-	    perror_with_name (filename);
-	  if ((scnhdr.s_flags & S_TYPMASK) >= S_TEXT
-	      && (scnhdr.s_flags & S_TYPMASK) <= S_COMON)
-	    {
-	      core_map[n_core].mem_addr = scnhdr.s_vaddr;
-	      core_map[n_core].mem_end = scnhdr.s_vaddr + scnhdr.s_size;
-	      core_map[n_core].file_addr = scnhdr.s_scnptr;
-	      core_map[n_core].type = scnhdr.s_flags & S_TYPMASK;
-	      if (core_map[n_core].type != S_TBSS
-		  && core_map[n_core].type != S_TDATA
-		  && core_map[n_core].type != S_TTEXT)
-		core_map[n_core].thread = -1;
-	      else if (n_core == 0
-		       || core_map[n_core-1].mem_addr != scnhdr.s_vaddr)
-		core_map[n_core].thread = 0;
-	      else 
-		core_map[n_core].thread = core_map[n_core-1].thread + 1;
-	      n_core++;
-	    }
-	  else if ((scnhdr.s_flags & S_TYPMASK) == S_CONTEXT)
-	    context_offset = scnhdr.s_scnptr;
-	  else if ((scnhdr.s_flags & S_TYPMASK) == S_TCONTEXT) 
-	    tcontext_offset[n_threads++] = scnhdr.s_scnptr;
-	}
-
-      /* Read the context block, struct user, struct proc,
-	 and the comm regs.  */
-
-      lseek (corechan, context_offset, 0);
-      if (myread (corechan, &c, sizeof c) < 0)
-	perror_with_name (filename);
-      lseek (corechan, c.core_user_p, 0);
-      if (myread (corechan, &u, sizeof u) < 0)
-	perror_with_name (filename);
-      lseek (corechan, c.core_proc_p, 0);
-      if (myread (corechan, &pr, sizeof pr) < 0)
-	perror_with_name (filename);
-      comm_registers = pr.p_creg;
-
-      /* Core file apparently is really there.  Make it really exist
-	 for xfer_core_file so we can do read_memory on it. */
-
-      if (filename[0] == '/')
-	corefile = savestring (filename, strlen (filename));
-      else
-	corefile = concat (current_directory, "/", filename, NULL);
-
-      printf_filtered ("Program %s ", u.u_comm);
-
-      /* Read the thread registers and fill in the thread_xxx[] data.  */
-
-      for (n = 0; n < n_threads; n++)
-	{
-	  select_thread (n);
-
-	  lseek (corechan, tcontext_offset[n], 0);
-	  if (myread (corechan, &tc, sizeof tc) < 0)
-	    perror_with_name (corefile);
-	  lseek (corechan, tc.core_thread_p, 0);
-	  if (myread (corechan, &th, sizeof th) < 0)
-	    perror_with_name (corefile);
-
-	  lseek (corechan, tc.core_syscall_context_p, 0);
-	  if (myread (corechan, registers, REGISTER_BYTES) < 0)
-	    perror_with_name (corefile);
-
-	  thread_signal[n] = th.t_cursig;
-	  thread_sigcode[n] = th.t_code;
-	  thread_state[n] = th.t_state;
-	  thread_pc[n] = read_pc ();
-
-	  if (thread_pc[n] > STACK_END_ADDR)
-	    {
-	      POP_FRAME;
-	      if (is_break_pc (thread_pc[n]))
-		thread_pc[n] = read_pc () - 2;
-	      else
-		thread_pc[n] = read_pc ();
-	      write_register (PC_REGNUM, thread_pc[n]);
-	    }
-
-	  printf_filtered ("thread %d received signal %d, %s\n",
-			   n, thread_signal[n],
-			   safe_strsignal (thread_signal[n]));
-	}
-
-      /* Select an interesting thread -- also-rans died with SIGKILL,
-	 so find one that didn't.  */
-
-      for (n = 0; n < n_threads; n++)
-	if (thread_signal[n] != 0 && thread_signal[n] != SIGKILL)
-	  {
-	    select_thread (n);
-	    stop_signal = thread_signal[n];
-	    stop_sigcode = thread_sigcode[n];
-	    break;
-	  }
-
-      core_aouthdr.a_magic = 0;
-
-      flush_cached_frames ();
-      select_frame (get_current_frame (), 0);
-      validate_files ();
-
-      print_stack_frame (selected_frame, selected_frame_level, -1);
-    }
-  else if (from_tty)
-    printf_filtered ("No core file now.\n");
-}