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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [gdb/] [inf-ptrace.c] - Diff between revs 227 and 816

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/* Low-level child interface to ptrace.
/* Low-level child interface to ptrace.
 
 
   Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
   Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
   1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.
   Free Software Foundation, Inc.
 
 
   This file is part of GDB.
   This file is part of GDB.
 
 
   This program is free software; you can redistribute it and/or modify
   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
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   (at your option) any later version.
 
 
   This program is distributed in the hope that it will be useful,
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   GNU General Public License for more details.
 
 
   You should have received a copy of the GNU General Public License
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
#include "defs.h"
#include "defs.h"
#include "command.h"
#include "command.h"
#include "inferior.h"
#include "inferior.h"
#include "inflow.h"
#include "inflow.h"
#include "terminal.h"
#include "terminal.h"
#include "gdbcore.h"
#include "gdbcore.h"
#include "regcache.h"
#include "regcache.h"
 
 
#include "gdb_assert.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#include "gdb_string.h"
#include "gdb_ptrace.h"
#include "gdb_ptrace.h"
#include "gdb_wait.h"
#include "gdb_wait.h"
#include <signal.h>
#include <signal.h>
 
 
#include "inf-ptrace.h"
#include "inf-ptrace.h"
#include "inf-child.h"
#include "inf-child.h"
#include "gdbthread.h"
#include "gdbthread.h"
 
 


 
 
#ifdef PT_GET_PROCESS_STATE
#ifdef PT_GET_PROCESS_STATE
 
 
static int
static int
inf_ptrace_follow_fork (struct target_ops *ops, int follow_child)
inf_ptrace_follow_fork (struct target_ops *ops, int follow_child)
{
{
  pid_t pid, fpid;
  pid_t pid, fpid;
  ptrace_state_t pe;
  ptrace_state_t pe;
 
 
  pid = ptid_get_pid (inferior_ptid);
  pid = ptid_get_pid (inferior_ptid);
 
 
  if (ptrace (PT_GET_PROCESS_STATE, pid,
  if (ptrace (PT_GET_PROCESS_STATE, pid,
               (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
               (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
    perror_with_name (("ptrace"));
    perror_with_name (("ptrace"));
 
 
  gdb_assert (pe.pe_report_event == PTRACE_FORK);
  gdb_assert (pe.pe_report_event == PTRACE_FORK);
  fpid = pe.pe_other_pid;
  fpid = pe.pe_other_pid;
 
 
  if (follow_child)
  if (follow_child)
    {
    {
      struct inferior *parent_inf, *child_inf;
      struct inferior *parent_inf, *child_inf;
      struct thread_info *tp;
      struct thread_info *tp;
 
 
      parent_inf = find_inferior_pid (pid);
      parent_inf = find_inferior_pid (pid);
 
 
      /* Add the child.  */
      /* Add the child.  */
      child_inf = add_inferior (fpid);
      child_inf = add_inferior (fpid);
      child_inf->attach_flag = parent_inf->attach_flag;
      child_inf->attach_flag = parent_inf->attach_flag;
      copy_terminal_info (child_inf, parent_inf);
      copy_terminal_info (child_inf, parent_inf);
      child_inf->pspace = parent_inf->pspace;
      child_inf->pspace = parent_inf->pspace;
      child_inf->aspace = parent_inf->aspace;
      child_inf->aspace = parent_inf->aspace;
 
 
      /* Before detaching from the parent, remove all breakpoints from
      /* Before detaching from the parent, remove all breakpoints from
         it.  */
         it.  */
      remove_breakpoints ();
      remove_breakpoints ();
 
 
      if (ptrace (PT_DETACH, pid, (PTRACE_TYPE_ARG3)1, 0) == -1)
      if (ptrace (PT_DETACH, pid, (PTRACE_TYPE_ARG3)1, 0) == -1)
        perror_with_name (("ptrace"));
        perror_with_name (("ptrace"));
 
 
      /* Switch inferior_ptid out of the parent's way.  */
      /* Switch inferior_ptid out of the parent's way.  */
      inferior_ptid = pid_to_ptid (fpid);
      inferior_ptid = pid_to_ptid (fpid);
 
 
      /* Delete the parent.  */
      /* Delete the parent.  */
      detach_inferior (pid);
      detach_inferior (pid);
 
 
      add_thread_silent (inferior_ptid);
      add_thread_silent (inferior_ptid);
    }
    }
  else
  else
    {
    {
      /* Breakpoints have already been detached from the child by
      /* Breakpoints have already been detached from the child by
         infrun.c.  */
         infrun.c.  */
 
 
      if (ptrace (PT_DETACH, fpid, (PTRACE_TYPE_ARG3)1, 0) == -1)
      if (ptrace (PT_DETACH, fpid, (PTRACE_TYPE_ARG3)1, 0) == -1)
        perror_with_name (("ptrace"));
        perror_with_name (("ptrace"));
    }
    }
 
 
  return 0;
  return 0;
}
}
 
 
#endif /* PT_GET_PROCESS_STATE */
#endif /* PT_GET_PROCESS_STATE */


 
 
/* Prepare to be traced.  */
/* Prepare to be traced.  */
 
 
static void
static void
inf_ptrace_me (void)
inf_ptrace_me (void)
{
{
  /* "Trace me, Dr. Memory!"  */
  /* "Trace me, Dr. Memory!"  */
  ptrace (PT_TRACE_ME, 0, (PTRACE_TYPE_ARG3)0, 0);
  ptrace (PT_TRACE_ME, 0, (PTRACE_TYPE_ARG3)0, 0);
}
}
 
 
/* Start a new inferior Unix child process.  EXEC_FILE is the file to
/* Start a new inferior Unix child process.  EXEC_FILE is the file to
   run, ALLARGS is a string containing the arguments to the program.
   run, ALLARGS is a string containing the arguments to the program.
   ENV is the environment vector to pass.  If FROM_TTY is non-zero, be
   ENV is the environment vector to pass.  If FROM_TTY is non-zero, be
   chatty about it.  */
   chatty about it.  */
 
 
static void
static void
inf_ptrace_create_inferior (struct target_ops *ops,
inf_ptrace_create_inferior (struct target_ops *ops,
                            char *exec_file, char *allargs, char **env,
                            char *exec_file, char *allargs, char **env,
                            int from_tty)
                            int from_tty)
{
{
  int pid;
  int pid;
 
 
  pid = fork_inferior (exec_file, allargs, env, inf_ptrace_me, NULL,
  pid = fork_inferior (exec_file, allargs, env, inf_ptrace_me, NULL,
                       NULL, NULL);
                       NULL, NULL);
 
 
  push_target (ops);
  push_target (ops);
 
 
  /* On some targets, there must be some explicit synchronization
  /* On some targets, there must be some explicit synchronization
     between the parent and child processes after the debugger
     between the parent and child processes after the debugger
     forks, and before the child execs the debuggee program.  This
     forks, and before the child execs the debuggee program.  This
     call basically gives permission for the child to exec.  */
     call basically gives permission for the child to exec.  */
 
 
  target_acknowledge_created_inferior (pid);
  target_acknowledge_created_inferior (pid);
 
 
  /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, and will
  /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, and will
     be 1 or 2 depending on whether we're starting without or with a
     be 1 or 2 depending on whether we're starting without or with a
     shell.  */
     shell.  */
  startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
  startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
 
 
  /* On some targets, there must be some explicit actions taken after
  /* On some targets, there must be some explicit actions taken after
     the inferior has been started up.  */
     the inferior has been started up.  */
  target_post_startup_inferior (pid_to_ptid (pid));
  target_post_startup_inferior (pid_to_ptid (pid));
}
}
 
 
#ifdef PT_GET_PROCESS_STATE
#ifdef PT_GET_PROCESS_STATE
 
 
static void
static void
inf_ptrace_post_startup_inferior (ptid_t pid)
inf_ptrace_post_startup_inferior (ptid_t pid)
{
{
  ptrace_event_t pe;
  ptrace_event_t pe;
 
 
  /* Set the initial event mask.  */
  /* Set the initial event mask.  */
  memset (&pe, 0, sizeof pe);
  memset (&pe, 0, sizeof pe);
  pe.pe_set_event |= PTRACE_FORK;
  pe.pe_set_event |= PTRACE_FORK;
  if (ptrace (PT_SET_EVENT_MASK, ptid_get_pid (pid),
  if (ptrace (PT_SET_EVENT_MASK, ptid_get_pid (pid),
              (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
              (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
    perror_with_name (("ptrace"));
    perror_with_name (("ptrace"));
}
}
 
 
#endif
#endif
 
 
/* Clean up a rotting corpse of an inferior after it died.  */
/* Clean up a rotting corpse of an inferior after it died.  */
 
 
static void
static void
inf_ptrace_mourn_inferior (struct target_ops *ops)
inf_ptrace_mourn_inferior (struct target_ops *ops)
{
{
  int status;
  int status;
 
 
  /* Wait just one more time to collect the inferior's exit status.
  /* Wait just one more time to collect the inferior's exit status.
     Do not check whether this succeeds though, since we may be
     Do not check whether this succeeds though, since we may be
     dealing with a process that we attached to.  Such a process will
     dealing with a process that we attached to.  Such a process will
     only report its exit status to its original parent.  */
     only report its exit status to its original parent.  */
  waitpid (ptid_get_pid (inferior_ptid), &status, 0);
  waitpid (ptid_get_pid (inferior_ptid), &status, 0);
 
 
  generic_mourn_inferior ();
  generic_mourn_inferior ();
 
 
  if (!have_inferiors ())
  if (!have_inferiors ())
    unpush_target (ops);
    unpush_target (ops);
}
}
 
 
/* Attach to the process specified by ARGS.  If FROM_TTY is non-zero,
/* Attach to the process specified by ARGS.  If FROM_TTY is non-zero,
   be chatty about it.  */
   be chatty about it.  */
 
 
static void
static void
inf_ptrace_attach (struct target_ops *ops, char *args, int from_tty)
inf_ptrace_attach (struct target_ops *ops, char *args, int from_tty)
{
{
  char *exec_file;
  char *exec_file;
  pid_t pid;
  pid_t pid;
  struct inferior *inf;
  struct inferior *inf;
 
 
  pid = parse_pid_to_attach (args);
  pid = parse_pid_to_attach (args);
 
 
  if (pid == getpid ())         /* Trying to masturbate?  */
  if (pid == getpid ())         /* Trying to masturbate?  */
    error (_("I refuse to debug myself!"));
    error (_("I refuse to debug myself!"));
 
 
  if (from_tty)
  if (from_tty)
    {
    {
      exec_file = get_exec_file (0);
      exec_file = get_exec_file (0);
 
 
      if (exec_file)
      if (exec_file)
        printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
        printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
                           target_pid_to_str (pid_to_ptid (pid)));
                           target_pid_to_str (pid_to_ptid (pid)));
      else
      else
        printf_unfiltered (_("Attaching to %s\n"),
        printf_unfiltered (_("Attaching to %s\n"),
                           target_pid_to_str (pid_to_ptid (pid)));
                           target_pid_to_str (pid_to_ptid (pid)));
 
 
      gdb_flush (gdb_stdout);
      gdb_flush (gdb_stdout);
    }
    }
 
 
#ifdef PT_ATTACH
#ifdef PT_ATTACH
  errno = 0;
  errno = 0;
  ptrace (PT_ATTACH, pid, (PTRACE_TYPE_ARG3)0, 0);
  ptrace (PT_ATTACH, pid, (PTRACE_TYPE_ARG3)0, 0);
  if (errno != 0)
  if (errno != 0)
    perror_with_name (("ptrace"));
    perror_with_name (("ptrace"));
#else
#else
  error (_("This system does not support attaching to a process"));
  error (_("This system does not support attaching to a process"));
#endif
#endif
 
 
  inf = current_inferior ();
  inf = current_inferior ();
  inferior_appeared (inf, pid);
  inferior_appeared (inf, pid);
  inf->attach_flag = 1;
  inf->attach_flag = 1;
  inferior_ptid = pid_to_ptid (pid);
  inferior_ptid = pid_to_ptid (pid);
 
 
  /* Always add a main thread.  If some target extends the ptrace
  /* Always add a main thread.  If some target extends the ptrace
     target, it should decorate the ptid later with more info.  */
     target, it should decorate the ptid later with more info.  */
  add_thread_silent (inferior_ptid);
  add_thread_silent (inferior_ptid);
 
 
  push_target(ops);
  push_target(ops);
}
}
 
 
#ifdef PT_GET_PROCESS_STATE
#ifdef PT_GET_PROCESS_STATE
 
 
void
void
inf_ptrace_post_attach (int pid)
inf_ptrace_post_attach (int pid)
{
{
  ptrace_event_t pe;
  ptrace_event_t pe;
 
 
  /* Set the initial event mask.  */
  /* Set the initial event mask.  */
  memset (&pe, 0, sizeof pe);
  memset (&pe, 0, sizeof pe);
  pe.pe_set_event |= PTRACE_FORK;
  pe.pe_set_event |= PTRACE_FORK;
  if (ptrace (PT_SET_EVENT_MASK, pid,
  if (ptrace (PT_SET_EVENT_MASK, pid,
              (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
              (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
    perror_with_name (("ptrace"));
    perror_with_name (("ptrace"));
}
}
 
 
#endif
#endif
 
 
/* Detach from the inferior, optionally passing it the signal
/* Detach from the inferior, optionally passing it the signal
   specified by ARGS.  If FROM_TTY is non-zero, be chatty about it.  */
   specified by ARGS.  If FROM_TTY is non-zero, be chatty about it.  */
 
 
static void
static void
inf_ptrace_detach (struct target_ops *ops, char *args, int from_tty)
inf_ptrace_detach (struct target_ops *ops, char *args, int from_tty)
{
{
  pid_t pid = ptid_get_pid (inferior_ptid);
  pid_t pid = ptid_get_pid (inferior_ptid);
  int sig = 0;
  int sig = 0;
 
 
  if (from_tty)
  if (from_tty)
    {
    {
      char *exec_file = get_exec_file (0);
      char *exec_file = get_exec_file (0);
      if (exec_file == 0)
      if (exec_file == 0)
        exec_file = "";
        exec_file = "";
      printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
      printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
                         target_pid_to_str (pid_to_ptid (pid)));
                         target_pid_to_str (pid_to_ptid (pid)));
      gdb_flush (gdb_stdout);
      gdb_flush (gdb_stdout);
    }
    }
  if (args)
  if (args)
    sig = atoi (args);
    sig = atoi (args);
 
 
#ifdef PT_DETACH
#ifdef PT_DETACH
  /* We'd better not have left any breakpoints in the program or it'll
  /* We'd better not have left any breakpoints in the program or it'll
     die when it hits one.  Also note that this may only work if we
     die when it hits one.  Also note that this may only work if we
     previously attached to the inferior.  It *might* work if we
     previously attached to the inferior.  It *might* work if we
     started the process ourselves.  */
     started the process ourselves.  */
  errno = 0;
  errno = 0;
  ptrace (PT_DETACH, pid, (PTRACE_TYPE_ARG3)1, sig);
  ptrace (PT_DETACH, pid, (PTRACE_TYPE_ARG3)1, sig);
  if (errno != 0)
  if (errno != 0)
    perror_with_name (("ptrace"));
    perror_with_name (("ptrace"));
#else
#else
  error (_("This system does not support detaching from a process"));
  error (_("This system does not support detaching from a process"));
#endif
#endif
 
 
  inferior_ptid = null_ptid;
  inferior_ptid = null_ptid;
  detach_inferior (pid);
  detach_inferior (pid);
 
 
  if (!have_inferiors ())
  if (!have_inferiors ())
    unpush_target (ops);
    unpush_target (ops);
}
}
 
 
/* Kill the inferior.  */
/* Kill the inferior.  */
 
 
static void
static void
inf_ptrace_kill (struct target_ops *ops)
inf_ptrace_kill (struct target_ops *ops)
{
{
  pid_t pid = ptid_get_pid (inferior_ptid);
  pid_t pid = ptid_get_pid (inferior_ptid);
  int status;
  int status;
 
 
  if (pid == 0)
  if (pid == 0)
    return;
    return;
 
 
  ptrace (PT_KILL, pid, (PTRACE_TYPE_ARG3)0, 0);
  ptrace (PT_KILL, pid, (PTRACE_TYPE_ARG3)0, 0);
  waitpid (pid, &status, 0);
  waitpid (pid, &status, 0);
 
 
  target_mourn_inferior ();
  target_mourn_inferior ();
}
}
 
 
/* Stop the inferior.  */
/* Stop the inferior.  */
 
 
static void
static void
inf_ptrace_stop (ptid_t ptid)
inf_ptrace_stop (ptid_t ptid)
{
{
  /* Send a SIGINT to the process group.  This acts just like the user
  /* Send a SIGINT to the process group.  This acts just like the user
     typed a ^C on the controlling terminal.  Note that using a
     typed a ^C on the controlling terminal.  Note that using a
     negative process number in kill() is a System V-ism.  The proper
     negative process number in kill() is a System V-ism.  The proper
     BSD interface is killpg().  However, all modern BSDs support the
     BSD interface is killpg().  However, all modern BSDs support the
     System V interface too.  */
     System V interface too.  */
  kill (-inferior_process_group (), SIGINT);
  kill (-inferior_process_group (), SIGINT);
}
}
 
 
/* Resume execution of thread PTID, or all threads if PTID is -1.  If
/* Resume execution of thread PTID, or all threads if PTID is -1.  If
   STEP is nonzero, single-step it.  If SIGNAL is nonzero, give it
   STEP is nonzero, single-step it.  If SIGNAL is nonzero, give it
   that signal.  */
   that signal.  */
 
 
static void
static void
inf_ptrace_resume (struct target_ops *ops,
inf_ptrace_resume (struct target_ops *ops,
                   ptid_t ptid, int step, enum target_signal signal)
                   ptid_t ptid, int step, enum target_signal signal)
{
{
  pid_t pid = ptid_get_pid (ptid);
  pid_t pid = ptid_get_pid (ptid);
  int request;
  int request;
 
 
  if (pid == -1)
  if (pid == -1)
    /* Resume all threads.  Traditionally ptrace() only supports
    /* Resume all threads.  Traditionally ptrace() only supports
       single-threaded processes, so simply resume the inferior.  */
       single-threaded processes, so simply resume the inferior.  */
    pid = ptid_get_pid (inferior_ptid);
    pid = ptid_get_pid (inferior_ptid);
 
 
  if (catch_syscall_enabled () > 0)
  if (catch_syscall_enabled () > 0)
    request = PT_SYSCALL;
    request = PT_SYSCALL;
  else
  else
    request = PT_CONTINUE;
    request = PT_CONTINUE;
 
 
  if (step)
  if (step)
    {
    {
      /* If this system does not support PT_STEP, a higher level
      /* If this system does not support PT_STEP, a higher level
         function will have called single_step() to transmute the step
         function will have called single_step() to transmute the step
         request into a continue request (by setting breakpoints on
         request into a continue request (by setting breakpoints on
         all possible successor instructions), so we don't have to
         all possible successor instructions), so we don't have to
         worry about that here.  */
         worry about that here.  */
      request = PT_STEP;
      request = PT_STEP;
    }
    }
 
 
  /* An address of (PTRACE_TYPE_ARG3)1 tells ptrace to continue from
  /* An address of (PTRACE_TYPE_ARG3)1 tells ptrace to continue from
     where it was.  If GDB wanted it to start some other way, we have
     where it was.  If GDB wanted it to start some other way, we have
     already written a new program counter value to the child.  */
     already written a new program counter value to the child.  */
  errno = 0;
  errno = 0;
  ptrace (request, pid, (PTRACE_TYPE_ARG3)1, target_signal_to_host (signal));
  ptrace (request, pid, (PTRACE_TYPE_ARG3)1, target_signal_to_host (signal));
  if (errno != 0)
  if (errno != 0)
    perror_with_name (("ptrace"));
    perror_with_name (("ptrace"));
}
}
 
 
/* Wait for the child specified by PTID to do something.  Return the
/* Wait for the child specified by PTID to do something.  Return the
   process ID of the child, or MINUS_ONE_PTID in case of error; store
   process ID of the child, or MINUS_ONE_PTID in case of error; store
   the status in *OURSTATUS.  */
   the status in *OURSTATUS.  */
 
 
static ptid_t
static ptid_t
inf_ptrace_wait (struct target_ops *ops,
inf_ptrace_wait (struct target_ops *ops,
                 ptid_t ptid, struct target_waitstatus *ourstatus, int options)
                 ptid_t ptid, struct target_waitstatus *ourstatus, int options)
{
{
  pid_t pid;
  pid_t pid;
  int status, save_errno;
  int status, save_errno;
 
 
  do
  do
    {
    {
      set_sigint_trap ();
      set_sigint_trap ();
 
 
      do
      do
        {
        {
          pid = waitpid (ptid_get_pid (ptid), &status, 0);
          pid = waitpid (ptid_get_pid (ptid), &status, 0);
          save_errno = errno;
          save_errno = errno;
        }
        }
      while (pid == -1 && errno == EINTR);
      while (pid == -1 && errno == EINTR);
 
 
      clear_sigint_trap ();
      clear_sigint_trap ();
 
 
      if (pid == -1)
      if (pid == -1)
        {
        {
          fprintf_unfiltered (gdb_stderr,
          fprintf_unfiltered (gdb_stderr,
                              _("Child process unexpectedly missing: %s.\n"),
                              _("Child process unexpectedly missing: %s.\n"),
                              safe_strerror (save_errno));
                              safe_strerror (save_errno));
 
 
          /* Claim it exited with unknown signal.  */
          /* Claim it exited with unknown signal.  */
          ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
          ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
          ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
          ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
          return inferior_ptid;
          return inferior_ptid;
        }
        }
 
 
      /* Ignore terminated detached child processes.  */
      /* Ignore terminated detached child processes.  */
      if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid))
      if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid))
        pid = -1;
        pid = -1;
    }
    }
  while (pid == -1);
  while (pid == -1);
 
 
#ifdef PT_GET_PROCESS_STATE
#ifdef PT_GET_PROCESS_STATE
  if (WIFSTOPPED (status))
  if (WIFSTOPPED (status))
    {
    {
      ptrace_state_t pe;
      ptrace_state_t pe;
      pid_t fpid;
      pid_t fpid;
 
 
      if (ptrace (PT_GET_PROCESS_STATE, pid,
      if (ptrace (PT_GET_PROCESS_STATE, pid,
                  (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
                  (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
        perror_with_name (("ptrace"));
        perror_with_name (("ptrace"));
 
 
      switch (pe.pe_report_event)
      switch (pe.pe_report_event)
        {
        {
        case PTRACE_FORK:
        case PTRACE_FORK:
          ourstatus->kind = TARGET_WAITKIND_FORKED;
          ourstatus->kind = TARGET_WAITKIND_FORKED;
          ourstatus->value.related_pid = pid_to_ptid (pe.pe_other_pid);
          ourstatus->value.related_pid = pid_to_ptid (pe.pe_other_pid);
 
 
          /* Make sure the other end of the fork is stopped too.  */
          /* Make sure the other end of the fork is stopped too.  */
          fpid = waitpid (pe.pe_other_pid, &status, 0);
          fpid = waitpid (pe.pe_other_pid, &status, 0);
          if (fpid == -1)
          if (fpid == -1)
            perror_with_name (("waitpid"));
            perror_with_name (("waitpid"));
 
 
          if (ptrace (PT_GET_PROCESS_STATE, fpid,
          if (ptrace (PT_GET_PROCESS_STATE, fpid,
                      (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
                      (PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
            perror_with_name (("ptrace"));
            perror_with_name (("ptrace"));
 
 
          gdb_assert (pe.pe_report_event == PTRACE_FORK);
          gdb_assert (pe.pe_report_event == PTRACE_FORK);
          gdb_assert (pe.pe_other_pid == pid);
          gdb_assert (pe.pe_other_pid == pid);
          if (fpid == ptid_get_pid (inferior_ptid))
          if (fpid == ptid_get_pid (inferior_ptid))
            {
            {
              ourstatus->value.related_pid = pid_to_ptid (pe.pe_other_pid);
              ourstatus->value.related_pid = pid_to_ptid (pe.pe_other_pid);
              return pid_to_ptid (fpid);
              return pid_to_ptid (fpid);
            }
            }
 
 
          return pid_to_ptid (pid);
          return pid_to_ptid (pid);
        }
        }
    }
    }
#endif
#endif
 
 
  store_waitstatus (ourstatus, status);
  store_waitstatus (ourstatus, status);
  return pid_to_ptid (pid);
  return pid_to_ptid (pid);
}
}
 
 
/* Attempt a transfer all LEN bytes starting at OFFSET between the
/* Attempt a transfer all LEN bytes starting at OFFSET between the
   inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
   inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
   Return the number of bytes actually transferred.  */
   Return the number of bytes actually transferred.  */
 
 
static LONGEST
static LONGEST
inf_ptrace_xfer_partial (struct target_ops *ops, enum target_object object,
inf_ptrace_xfer_partial (struct target_ops *ops, enum target_object object,
                         const char *annex, gdb_byte *readbuf,
                         const char *annex, gdb_byte *readbuf,
                         const gdb_byte *writebuf,
                         const gdb_byte *writebuf,
                         ULONGEST offset, LONGEST len)
                         ULONGEST offset, LONGEST len)
{
{
  pid_t pid = ptid_get_pid (inferior_ptid);
  pid_t pid = ptid_get_pid (inferior_ptid);
 
 
  switch (object)
  switch (object)
    {
    {
    case TARGET_OBJECT_MEMORY:
    case TARGET_OBJECT_MEMORY:
#ifdef PT_IO
#ifdef PT_IO
      /* OpenBSD 3.1, NetBSD 1.6 and FreeBSD 5.0 have a new PT_IO
      /* OpenBSD 3.1, NetBSD 1.6 and FreeBSD 5.0 have a new PT_IO
         request that promises to be much more efficient in reading
         request that promises to be much more efficient in reading
         and writing data in the traced process's address space.  */
         and writing data in the traced process's address space.  */
      {
      {
        struct ptrace_io_desc piod;
        struct ptrace_io_desc piod;
 
 
        /* NOTE: We assume that there are no distinct address spaces
        /* NOTE: We assume that there are no distinct address spaces
           for instruction and data.  However, on OpenBSD 3.9 and
           for instruction and data.  However, on OpenBSD 3.9 and
           later, PIOD_WRITE_D doesn't allow changing memory that's
           later, PIOD_WRITE_D doesn't allow changing memory that's
           mapped read-only.  Since most code segments will be
           mapped read-only.  Since most code segments will be
           read-only, using PIOD_WRITE_D will prevent us from
           read-only, using PIOD_WRITE_D will prevent us from
           inserting breakpoints, so we use PIOD_WRITE_I instead.  */
           inserting breakpoints, so we use PIOD_WRITE_I instead.  */
        piod.piod_op = writebuf ? PIOD_WRITE_I : PIOD_READ_D;
        piod.piod_op = writebuf ? PIOD_WRITE_I : PIOD_READ_D;
        piod.piod_addr = writebuf ? (void *) writebuf : readbuf;
        piod.piod_addr = writebuf ? (void *) writebuf : readbuf;
        piod.piod_offs = (void *) (long) offset;
        piod.piod_offs = (void *) (long) offset;
        piod.piod_len = len;
        piod.piod_len = len;
 
 
        errno = 0;
        errno = 0;
        if (ptrace (PT_IO, pid, (caddr_t)&piod, 0) == 0)
        if (ptrace (PT_IO, pid, (caddr_t)&piod, 0) == 0)
          /* Return the actual number of bytes read or written.  */
          /* Return the actual number of bytes read or written.  */
          return piod.piod_len;
          return piod.piod_len;
        /* If the PT_IO request is somehow not supported, fallback on
        /* If the PT_IO request is somehow not supported, fallback on
           using PT_WRITE_D/PT_READ_D.  Otherwise we will return zero
           using PT_WRITE_D/PT_READ_D.  Otherwise we will return zero
           to indicate failure.  */
           to indicate failure.  */
        if (errno != EINVAL)
        if (errno != EINVAL)
          return 0;
          return 0;
      }
      }
#endif
#endif
      {
      {
        union
        union
        {
        {
          PTRACE_TYPE_RET word;
          PTRACE_TYPE_RET word;
          gdb_byte byte[sizeof (PTRACE_TYPE_RET)];
          gdb_byte byte[sizeof (PTRACE_TYPE_RET)];
        } buffer;
        } buffer;
        ULONGEST rounded_offset;
        ULONGEST rounded_offset;
        LONGEST partial_len;
        LONGEST partial_len;
 
 
        /* Round the start offset down to the next long word
        /* Round the start offset down to the next long word
           boundary.  */
           boundary.  */
        rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
        rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
 
 
        /* Since ptrace will transfer a single word starting at that
        /* Since ptrace will transfer a single word starting at that
           rounded_offset the partial_len needs to be adjusted down to
           rounded_offset the partial_len needs to be adjusted down to
           that (remember this function only does a single transfer).
           that (remember this function only does a single transfer).
           Should the required length be even less, adjust it down
           Should the required length be even less, adjust it down
           again.  */
           again.  */
        partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset;
        partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset;
        if (partial_len > len)
        if (partial_len > len)
          partial_len = len;
          partial_len = len;
 
 
        if (writebuf)
        if (writebuf)
          {
          {
            /* If OFFSET:PARTIAL_LEN is smaller than
            /* If OFFSET:PARTIAL_LEN is smaller than
               ROUNDED_OFFSET:WORDSIZE then a read/modify write will
               ROUNDED_OFFSET:WORDSIZE then a read/modify write will
               be needed.  Read in the entire word.  */
               be needed.  Read in the entire word.  */
            if (rounded_offset < offset
            if (rounded_offset < offset
                || (offset + partial_len
                || (offset + partial_len
                    < rounded_offset + sizeof (PTRACE_TYPE_RET)))
                    < rounded_offset + sizeof (PTRACE_TYPE_RET)))
              /* Need part of initial word -- fetch it.  */
              /* Need part of initial word -- fetch it.  */
              buffer.word = ptrace (PT_READ_I, pid,
              buffer.word = ptrace (PT_READ_I, pid,
                                    (PTRACE_TYPE_ARG3)(uintptr_t)
                                    (PTRACE_TYPE_ARG3)(uintptr_t)
                                    rounded_offset, 0);
                                    rounded_offset, 0);
 
 
            /* Copy data to be written over corresponding part of
            /* Copy data to be written over corresponding part of
               buffer.  */
               buffer.  */
            memcpy (buffer.byte + (offset - rounded_offset),
            memcpy (buffer.byte + (offset - rounded_offset),
                    writebuf, partial_len);
                    writebuf, partial_len);
 
 
            errno = 0;
            errno = 0;
            ptrace (PT_WRITE_D, pid,
            ptrace (PT_WRITE_D, pid,
                    (PTRACE_TYPE_ARG3)(uintptr_t)rounded_offset,
                    (PTRACE_TYPE_ARG3)(uintptr_t)rounded_offset,
                    buffer.word);
                    buffer.word);
            if (errno)
            if (errno)
              {
              {
                /* Using the appropriate one (I or D) is necessary for
                /* Using the appropriate one (I or D) is necessary for
                   Gould NP1, at least.  */
                   Gould NP1, at least.  */
                errno = 0;
                errno = 0;
                ptrace (PT_WRITE_I, pid,
                ptrace (PT_WRITE_I, pid,
                        (PTRACE_TYPE_ARG3)(uintptr_t)rounded_offset,
                        (PTRACE_TYPE_ARG3)(uintptr_t)rounded_offset,
                        buffer.word);
                        buffer.word);
                if (errno)
                if (errno)
                  return 0;
                  return 0;
              }
              }
          }
          }
 
 
        if (readbuf)
        if (readbuf)
          {
          {
            errno = 0;
            errno = 0;
            buffer.word = ptrace (PT_READ_I, pid,
            buffer.word = ptrace (PT_READ_I, pid,
                                  (PTRACE_TYPE_ARG3)(uintptr_t)rounded_offset,
                                  (PTRACE_TYPE_ARG3)(uintptr_t)rounded_offset,
                                  0);
                                  0);
            if (errno)
            if (errno)
              return 0;
              return 0;
            /* Copy appropriate bytes out of the buffer.  */
            /* Copy appropriate bytes out of the buffer.  */
            memcpy (readbuf, buffer.byte + (offset - rounded_offset),
            memcpy (readbuf, buffer.byte + (offset - rounded_offset),
                    partial_len);
                    partial_len);
          }
          }
 
 
        return partial_len;
        return partial_len;
      }
      }
 
 
    case TARGET_OBJECT_UNWIND_TABLE:
    case TARGET_OBJECT_UNWIND_TABLE:
      return -1;
      return -1;
 
 
    case TARGET_OBJECT_AUXV:
    case TARGET_OBJECT_AUXV:
      return -1;
      return -1;
 
 
    case TARGET_OBJECT_WCOOKIE:
    case TARGET_OBJECT_WCOOKIE:
      return -1;
      return -1;
 
 
    default:
    default:
      return -1;
      return -1;
    }
    }
}
}
 
 
/* Return non-zero if the thread specified by PTID is alive.  */
/* Return non-zero if the thread specified by PTID is alive.  */
 
 
static int
static int
inf_ptrace_thread_alive (struct target_ops *ops, ptid_t ptid)
inf_ptrace_thread_alive (struct target_ops *ops, ptid_t ptid)
{
{
  /* ??? Is kill the right way to do this?  */
  /* ??? Is kill the right way to do this?  */
  return (kill (ptid_get_pid (ptid), 0) != -1);
  return (kill (ptid_get_pid (ptid), 0) != -1);
}
}
 
 
/* Print status information about what we're accessing.  */
/* Print status information about what we're accessing.  */
 
 
static void
static void
inf_ptrace_files_info (struct target_ops *ignore)
inf_ptrace_files_info (struct target_ops *ignore)
{
{
  struct inferior *inf = current_inferior ();
  struct inferior *inf = current_inferior ();
 
 
  printf_filtered (_("\tUsing the running image of %s %s.\n"),
  printf_filtered (_("\tUsing the running image of %s %s.\n"),
                   inf->attach_flag ? "attached" : "child",
                   inf->attach_flag ? "attached" : "child",
                   target_pid_to_str (inferior_ptid));
                   target_pid_to_str (inferior_ptid));
}
}
 
 
static char *
static char *
inf_ptrace_pid_to_str (struct target_ops *ops, ptid_t ptid)
inf_ptrace_pid_to_str (struct target_ops *ops, ptid_t ptid)
{
{
  return normal_pid_to_str (ptid);
  return normal_pid_to_str (ptid);
}
}
 
 
/* Create a prototype ptrace target.  The client can override it with
/* Create a prototype ptrace target.  The client can override it with
   local methods.  */
   local methods.  */
 
 
struct target_ops *
struct target_ops *
inf_ptrace_target (void)
inf_ptrace_target (void)
{
{
  struct target_ops *t = inf_child_target ();
  struct target_ops *t = inf_child_target ();
 
 
  t->to_attach = inf_ptrace_attach;
  t->to_attach = inf_ptrace_attach;
  t->to_detach = inf_ptrace_detach;
  t->to_detach = inf_ptrace_detach;
  t->to_resume = inf_ptrace_resume;
  t->to_resume = inf_ptrace_resume;
  t->to_wait = inf_ptrace_wait;
  t->to_wait = inf_ptrace_wait;
  t->to_files_info = inf_ptrace_files_info;
  t->to_files_info = inf_ptrace_files_info;
  t->to_kill = inf_ptrace_kill;
  t->to_kill = inf_ptrace_kill;
  t->to_create_inferior = inf_ptrace_create_inferior;
  t->to_create_inferior = inf_ptrace_create_inferior;
#ifdef PT_GET_PROCESS_STATE
#ifdef PT_GET_PROCESS_STATE
  t->to_follow_fork = inf_ptrace_follow_fork;
  t->to_follow_fork = inf_ptrace_follow_fork;
  t->to_post_startup_inferior = inf_ptrace_post_startup_inferior;
  t->to_post_startup_inferior = inf_ptrace_post_startup_inferior;
  t->to_post_attach = inf_ptrace_post_attach;
  t->to_post_attach = inf_ptrace_post_attach;
#endif
#endif
  t->to_mourn_inferior = inf_ptrace_mourn_inferior;
  t->to_mourn_inferior = inf_ptrace_mourn_inferior;
  t->to_thread_alive = inf_ptrace_thread_alive;
  t->to_thread_alive = inf_ptrace_thread_alive;
  t->to_pid_to_str = inf_ptrace_pid_to_str;
  t->to_pid_to_str = inf_ptrace_pid_to_str;
  t->to_stop = inf_ptrace_stop;
  t->to_stop = inf_ptrace_stop;
  t->to_xfer_partial = inf_ptrace_xfer_partial;
  t->to_xfer_partial = inf_ptrace_xfer_partial;
 
 
  return t;
  return t;
}
}


 
 
/* Pointer to a function that returns the offset within the user area
/* Pointer to a function that returns the offset within the user area
   where a particular register is stored.  */
   where a particular register is stored.  */
static CORE_ADDR (*inf_ptrace_register_u_offset)(struct gdbarch *, int, int);
static CORE_ADDR (*inf_ptrace_register_u_offset)(struct gdbarch *, int, int);
 
 
/* Fetch register REGNUM from the inferior.  */
/* Fetch register REGNUM from the inferior.  */
 
 
static void
static void
inf_ptrace_fetch_register (struct regcache *regcache, int regnum)
inf_ptrace_fetch_register (struct regcache *regcache, int regnum)
{
{
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
  CORE_ADDR addr;
  CORE_ADDR addr;
  size_t size;
  size_t size;
  PTRACE_TYPE_RET *buf;
  PTRACE_TYPE_RET *buf;
  int pid, i;
  int pid, i;
 
 
  /* This isn't really an address, but ptrace thinks of it as one.  */
  /* This isn't really an address, but ptrace thinks of it as one.  */
  addr = inf_ptrace_register_u_offset (gdbarch, regnum, 0);
  addr = inf_ptrace_register_u_offset (gdbarch, regnum, 0);
  if (addr == (CORE_ADDR)-1
  if (addr == (CORE_ADDR)-1
      || gdbarch_cannot_fetch_register (gdbarch, regnum))
      || gdbarch_cannot_fetch_register (gdbarch, regnum))
    {
    {
      regcache_raw_supply (regcache, regnum, NULL);
      regcache_raw_supply (regcache, regnum, NULL);
      return;
      return;
    }
    }
 
 
  /* Cater for systems like GNU/Linux, that implement threads as
  /* Cater for systems like GNU/Linux, that implement threads as
     separate processes.  */
     separate processes.  */
  pid = ptid_get_lwp (inferior_ptid);
  pid = ptid_get_lwp (inferior_ptid);
  if (pid == 0)
  if (pid == 0)
    pid = ptid_get_pid (inferior_ptid);
    pid = ptid_get_pid (inferior_ptid);
 
 
  size = register_size (gdbarch, regnum);
  size = register_size (gdbarch, regnum);
  gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
  gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
  buf = alloca (size);
  buf = alloca (size);
 
 
  /* Read the register contents from the inferior a chunk at a time.  */
  /* Read the register contents from the inferior a chunk at a time.  */
  for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
  for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
    {
    {
      errno = 0;
      errno = 0;
      buf[i] = ptrace (PT_READ_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, 0);
      buf[i] = ptrace (PT_READ_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, 0);
      if (errno != 0)
      if (errno != 0)
        error (_("Couldn't read register %s (#%d): %s."),
        error (_("Couldn't read register %s (#%d): %s."),
               gdbarch_register_name (gdbarch, regnum),
               gdbarch_register_name (gdbarch, regnum),
               regnum, safe_strerror (errno));
               regnum, safe_strerror (errno));
 
 
      addr += sizeof (PTRACE_TYPE_RET);
      addr += sizeof (PTRACE_TYPE_RET);
    }
    }
  regcache_raw_supply (regcache, regnum, buf);
  regcache_raw_supply (regcache, regnum, buf);
}
}
 
 
/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
   for all registers.  */
   for all registers.  */
 
 
static void
static void
inf_ptrace_fetch_registers (struct target_ops *ops,
inf_ptrace_fetch_registers (struct target_ops *ops,
                            struct regcache *regcache, int regnum)
                            struct regcache *regcache, int regnum)
{
{
  if (regnum == -1)
  if (regnum == -1)
    for (regnum = 0;
    for (regnum = 0;
         regnum < gdbarch_num_regs (get_regcache_arch (regcache));
         regnum < gdbarch_num_regs (get_regcache_arch (regcache));
         regnum++)
         regnum++)
      inf_ptrace_fetch_register (regcache, regnum);
      inf_ptrace_fetch_register (regcache, regnum);
  else
  else
    inf_ptrace_fetch_register (regcache, regnum);
    inf_ptrace_fetch_register (regcache, regnum);
}
}
 
 
/* Store register REGNUM into the inferior.  */
/* Store register REGNUM into the inferior.  */
 
 
static void
static void
inf_ptrace_store_register (const struct regcache *regcache, int regnum)
inf_ptrace_store_register (const struct regcache *regcache, int regnum)
{
{
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
  struct gdbarch *gdbarch = get_regcache_arch (regcache);
  CORE_ADDR addr;
  CORE_ADDR addr;
  size_t size;
  size_t size;
  PTRACE_TYPE_RET *buf;
  PTRACE_TYPE_RET *buf;
  int pid, i;
  int pid, i;
 
 
  /* This isn't really an address, but ptrace thinks of it as one.  */
  /* This isn't really an address, but ptrace thinks of it as one.  */
  addr = inf_ptrace_register_u_offset (gdbarch, regnum, 1);
  addr = inf_ptrace_register_u_offset (gdbarch, regnum, 1);
  if (addr == (CORE_ADDR)-1
  if (addr == (CORE_ADDR)-1
      || gdbarch_cannot_store_register (gdbarch, regnum))
      || gdbarch_cannot_store_register (gdbarch, regnum))
    return;
    return;
 
 
  /* Cater for systems like GNU/Linux, that implement threads as
  /* Cater for systems like GNU/Linux, that implement threads as
     separate processes.  */
     separate processes.  */
  pid = ptid_get_lwp (inferior_ptid);
  pid = ptid_get_lwp (inferior_ptid);
  if (pid == 0)
  if (pid == 0)
    pid = ptid_get_pid (inferior_ptid);
    pid = ptid_get_pid (inferior_ptid);
 
 
  size = register_size (gdbarch, regnum);
  size = register_size (gdbarch, regnum);
  gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
  gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
  buf = alloca (size);
  buf = alloca (size);
 
 
  /* Write the register contents into the inferior a chunk at a time.  */
  /* Write the register contents into the inferior a chunk at a time.  */
  regcache_raw_collect (regcache, regnum, buf);
  regcache_raw_collect (regcache, regnum, buf);
  for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
  for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
    {
    {
      errno = 0;
      errno = 0;
      ptrace (PT_WRITE_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, buf[i]);
      ptrace (PT_WRITE_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, buf[i]);
      if (errno != 0)
      if (errno != 0)
        error (_("Couldn't write register %s (#%d): %s."),
        error (_("Couldn't write register %s (#%d): %s."),
               gdbarch_register_name (gdbarch, regnum),
               gdbarch_register_name (gdbarch, regnum),
               regnum, safe_strerror (errno));
               regnum, safe_strerror (errno));
 
 
      addr += sizeof (PTRACE_TYPE_RET);
      addr += sizeof (PTRACE_TYPE_RET);
    }
    }
}
}
 
 
/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
   this for all registers.  */
   this for all registers.  */
 
 
static void
static void
inf_ptrace_store_registers (struct target_ops *ops,
inf_ptrace_store_registers (struct target_ops *ops,
                            struct regcache *regcache, int regnum)
                            struct regcache *regcache, int regnum)
{
{
  if (regnum == -1)
  if (regnum == -1)
    for (regnum = 0;
    for (regnum = 0;
         regnum < gdbarch_num_regs (get_regcache_arch (regcache));
         regnum < gdbarch_num_regs (get_regcache_arch (regcache));
         regnum++)
         regnum++)
      inf_ptrace_store_register (regcache, regnum);
      inf_ptrace_store_register (regcache, regnum);
  else
  else
    inf_ptrace_store_register (regcache, regnum);
    inf_ptrace_store_register (regcache, regnum);
}
}
 
 
/* Create a "traditional" ptrace target.  REGISTER_U_OFFSET should be
/* Create a "traditional" ptrace target.  REGISTER_U_OFFSET should be
   a function returning the offset within the user area where a
   a function returning the offset within the user area where a
   particular register is stored.  */
   particular register is stored.  */
 
 
struct target_ops *
struct target_ops *
inf_ptrace_trad_target (CORE_ADDR (*register_u_offset)
inf_ptrace_trad_target (CORE_ADDR (*register_u_offset)
                                        (struct gdbarch *, int, int))
                                        (struct gdbarch *, int, int))
{
{
  struct target_ops *t = inf_ptrace_target();
  struct target_ops *t = inf_ptrace_target();
 
 
  gdb_assert (register_u_offset);
  gdb_assert (register_u_offset);
  inf_ptrace_register_u_offset = register_u_offset;
  inf_ptrace_register_u_offset = register_u_offset;
  t->to_fetch_registers = inf_ptrace_fetch_registers;
  t->to_fetch_registers = inf_ptrace_fetch_registers;
  t->to_store_registers = inf_ptrace_store_registers;
  t->to_store_registers = inf_ptrace_store_registers;
 
 
  return t;
  return t;
}
}
 
 

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