procfs.c

早期freebsd实现

static char *
sigcodename (sip)
     siginfo_t *sip;
{
  struct sigcode *scp;
  char *name = NULL;
  static char locbuf[32];
  
  for (scp = siginfo_table; scp -> codename != NULL; scp++)
    {
      if ((scp -> signo == sip -> si_signo) &&
	  (scp -> code == sip -> si_code))
	{
	  name = scp -> codename;
	  break;
	}
    }
  if (name == NULL)
    {
      sprintf (locbuf, "sigcode %u", sip -> si_signo);
      name = locbuf;
    }
  return (name);
}

static char *
sigcodedesc (sip)
     siginfo_t *sip;
{
  struct sigcode *scp;
  char *desc = NULL;
  
  for (scp = siginfo_table; scp -> codename != NULL; scp++)
    {
      if ((scp -> signo == sip -> si_signo) &&
	  (scp -> code == sip -> si_code))
	{
	  desc = scp -> desc;
	  break;
	}
    }
  if (desc == NULL)
    {
      desc = "Unrecognized signal or trap use";
    }
  return (desc);
}

/*

LOCAL FUNCTION

	syscallname - translate a system call number into a system call name

SYNOPSIS

	char *syscallname (int syscallnum)

DESCRIPTION

	Given a system call number, translate it into the printable name
	of a system call, or into "syscall <num>" if it is an unknown
	number.
 */

static char *
syscallname (syscallnum)
     int syscallnum;
{
  static char locbuf[32];
  char *rtnval;
  
  if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
    {
      rtnval = syscall_table[syscallnum];
    }
  else
    {
      sprintf (locbuf, "syscall %u", syscallnum);
      rtnval = locbuf;
    }
  return (rtnval);
}

/*

LOCAL FUNCTION

	init_syscall_table - initialize syscall translation table

SYNOPSIS

	void init_syscall_table (void)

DESCRIPTION

	Dynamically initialize the translation table to convert system
	call numbers into printable system call names.  Done once per
	gdb run, on initialization.

NOTES

	This is awfully ugly, but preprocessor tricks to make it prettier
	tend to be nonportable.
 */

static void
init_syscall_table ()
{
#if defined (SYS_exit)
  syscall_table[SYS_exit] = "exit";
#endif
#if defined (SYS_fork)
  syscall_table[SYS_fork] = "fork";
#endif
#if defined (SYS_read)
  syscall_table[SYS_read] = "read";
#endif
#if defined (SYS_write)
  syscall_table[SYS_write] = "write";
#endif
#if defined (SYS_open)
  syscall_table[SYS_open] = "open";
#endif
#if defined (SYS_close)
  syscall_table[SYS_close] = "close";
#endif
#if defined (SYS_wait)
  syscall_table[SYS_wait] = "wait";
#endif
#if defined (SYS_creat)
  syscall_table[SYS_creat] = "creat";
#endif
#if defined (SYS_link)
  syscall_table[SYS_link] = "link";
#endif
#if defined (SYS_unlink)
  syscall_table[SYS_unlink] = "unlink";
#endif
#if defined (SYS_exec)
  syscall_table[SYS_exec] = "exec";
#endif
#if defined (SYS_execv)
  syscall_table[SYS_execv] = "execv";
#endif
#if defined (SYS_execve)
  syscall_table[SYS_execve] = "execve";
#endif
#if defined (SYS_chdir)
  syscall_table[SYS_chdir] = "chdir";
#endif
#if defined (SYS_time)
  syscall_table[SYS_time] = "time";
#endif
#if defined (SYS_mknod)
  syscall_table[SYS_mknod] = "mknod";
#endif
#if defined (SYS_chmod)
  syscall_table[SYS_chmod] = "chmod";
#endif
#if defined (SYS_chown)
  syscall_table[SYS_chown] = "chown";
#endif
#if defined (SYS_brk)
  syscall_table[SYS_brk] = "brk";
#endif
#if defined (SYS_stat)
  syscall_table[SYS_stat] = "stat";
#endif
#if defined (SYS_lseek)
  syscall_table[SYS_lseek] = "lseek";
#endif
#if defined (SYS_getpid)
  syscall_table[SYS_getpid] = "getpid";
#endif
#if defined (SYS_mount)
  syscall_table[SYS_mount] = "mount";
#endif
#if defined (SYS_umount)
  syscall_table[SYS_umount] = "umount";
#endif
#if defined (SYS_setuid)
  syscall_table[SYS_setuid] = "setuid";
#endif
#if defined (SYS_getuid)
  syscall_table[SYS_getuid] = "getuid";
#endif
#if defined (SYS_stime)
  syscall_table[SYS_stime] = "stime";
#endif
#if defined (SYS_ptrace)
  syscall_table[SYS_ptrace] = "ptrace";
#endif
#if defined (SYS_alarm)
  syscall_table[SYS_alarm] = "alarm";
#endif
#if defined (SYS_fstat)
  syscall_table[SYS_fstat] = "fstat";
#endif
#if defined (SYS_pause)
  syscall_table[SYS_pause] = "pause";
#endif
#if defined (SYS_utime)
  syscall_table[SYS_utime] = "utime";
#endif
#if defined (SYS_stty)
  syscall_table[SYS_stty] = "stty";
#endif
#if defined (SYS_gtty)
  syscall_table[SYS_gtty] = "gtty";
#endif
#if defined (SYS_access)
  syscall_table[SYS_access] = "access";
#endif
#if defined (SYS_nice)
  syscall_table[SYS_nice] = "nice";
#endif
#if defined (SYS_statfs)
  syscall_table[SYS_statfs] = "statfs";
#endif
#if defined (SYS_sync)
  syscall_table[SYS_sync] = "sync";
#endif
#if defined (SYS_kill)
  syscall_table[SYS_kill] = "kill";
#endif
#if defined (SYS_fstatfs)
  syscall_table[SYS_fstatfs] = "fstatfs";
#endif
#if defined (SYS_pgrpsys)
  syscall_table[SYS_pgrpsys] = "pgrpsys";
#endif
#if defined (SYS_xenix)
  syscall_table[SYS_xenix] = "xenix";
#endif
#if defined (SYS_dup)
  syscall_table[SYS_dup] = "dup";
#endif
#if defined (SYS_pipe)
  syscall_table[SYS_pipe] = "pipe";
#endif
#if defined (SYS_times)
  syscall_table[SYS_times] = "times";
#endif
#if defined (SYS_profil)
  syscall_table[SYS_profil] = "profil";
#endif
#if defined (SYS_plock)
  syscall_table[SYS_plock] = "plock";
#endif
#if defined (SYS_setgid)
  syscall_table[SYS_setgid] = "setgid";
#endif
#if defined (SYS_getgid)
  syscall_table[SYS_getgid] = "getgid";
#endif
#if defined (SYS_signal)
  syscall_table[SYS_signal] = "signal";
#endif
#if defined (SYS_msgsys)
  syscall_table[SYS_msgsys] = "msgsys";
#endif
#if defined (SYS_sys3b)
  syscall_table[SYS_sys3b] = "sys3b";
#endif
#if defined (SYS_acct)
  syscall_table[SYS_acct] = "acct";
#endif
#if defined (SYS_shmsys)
  syscall_table[SYS_shmsys] = "shmsys";
#endif
#if defined (SYS_semsys)
  syscall_table[SYS_semsys] = "semsys";
#endif
#if defined (SYS_ioctl)
  syscall_table[SYS_ioctl] = "ioctl";
#endif
#if defined (SYS_uadmin)
  syscall_table[SYS_uadmin] = "uadmin";
#endif
#if defined (SYS_utssys)
  syscall_table[SYS_utssys] = "utssys";
#endif
#if defined (SYS_fsync)
  syscall_table[SYS_fsync] = "fsync";
#endif
#if defined (SYS_umask)
  syscall_table[SYS_umask] = "umask";
#endif
#if defined (SYS_chroot)
  syscall_table[SYS_chroot] = "chroot";
#endif
#if defined (SYS_fcntl)
  syscall_table[SYS_fcntl] = "fcntl";
#endif
#if defined (SYS_ulimit)
  syscall_table[SYS_ulimit] = "ulimit";
#endif
#if defined (SYS_rfsys)
  syscall_table[SYS_rfsys] = "rfsys";
#endif
#if defined (SYS_rmdir)
  syscall_table[SYS_rmdir] = "rmdir";
#endif
#if defined (SYS_mkdir)
  syscall_table[SYS_mkdir] = "mkdir";
#endif
#if defined (SYS_getdents)
  syscall_table[SYS_getdents] = "getdents";
#endif
#if defined (SYS_sysfs)
  syscall_table[SYS_sysfs] = "sysfs";
#endif
#if defined (SYS_getmsg)
  syscall_table[SYS_getmsg] = "getmsg";
#endif
#if defined (SYS_putmsg)
  syscall_table[SYS_putmsg] = "putmsg";
#endif
#if defined (SYS_poll)
  syscall_table[SYS_poll] = "poll";
#endif
#if defined (SYS_lstat)
  syscall_table[SYS_lstat] = "lstat";
#endif
#if defined (SYS_symlink)
  syscall_table[SYS_symlink] = "symlink";
#endif
#if defined (SYS_readlink)
  syscall_table[SYS_readlink] = "readlink";
#endif
#if defined (SYS_setgroups)
  syscall_table[SYS_setgroups] = "setgroups";
#endif
#if defined (SYS_getgroups)
  syscall_table[SYS_getgroups] = "getgroups";
#endif
#if defined (SYS_fchmod)
  syscall_table[SYS_fchmod] = "fchmod";
#endif
#if defined (SYS_fchown)
  syscall_table[SYS_fchown] = "fchown";
#endif
#if defined (SYS_sigprocmask)
  syscall_table[SYS_sigprocmask] = "sigprocmask";
#endif
#if defined (SYS_sigsuspend)
  syscall_table[SYS_sigsuspend] = "sigsuspend";
#endif
#if defined (SYS_sigaltstack)
  syscall_table[SYS_sigaltstack] = "sigaltstack";
#endif
#if defined (SYS_sigaction)
  syscall_table[SYS_sigaction] = "sigaction";
#endif
#if defined (SYS_sigpending)
  syscall_table[SYS_sigpending] = "sigpending";
#endif
#if defined (SYS_context)
  syscall_table[SYS_context] = "context";
#endif
#if defined (SYS_evsys)
  syscall_table[SYS_evsys] = "evsys";
#endif
#if defined (SYS_evtrapret)
  syscall_table[SYS_evtrapret] = "evtrapret";
#endif
#if defined (SYS_statvfs)
  syscall_table[SYS_statvfs] = "statvfs";
#endif
#if defined (SYS_fstatvfs)
  syscall_table[SYS_fstatvfs] = "fstatvfs";
#endif
#if defined (SYS_nfssys)
  syscall_table[SYS_nfssys] = "nfssys";
#endif
#if defined (SYS_waitsys)
  syscall_table[SYS_waitsys] = "waitsys";
#endif
#if defined (SYS_sigsendsys)
  syscall_table[SYS_sigsendsys] = "sigsendsys";
#endif
#if defined (SYS_hrtsys)
  syscall_table[SYS_hrtsys] = "hrtsys";
#endif
#if defined (SYS_acancel)
  syscall_table[SYS_acancel] = "acancel";
#endif
#if defined (SYS_async)
  syscall_table[SYS_async] = "async";
#endif
#if defined (SYS_priocntlsys)
  syscall_table[SYS_priocntlsys] = "priocntlsys";
#endif
#if defined (SYS_pathconf)
  syscall_table[SYS_pathconf] = "pathconf";
#endif
#if defined (SYS_mincore)
  syscall_table[SYS_mincore] = "mincore";
#endif
#if defined (SYS_mmap)
  syscall_table[SYS_mmap] = "mmap";
#endif
#if defined (SYS_mprotect)
  syscall_table[SYS_mprotect] = "mprotect";
#endif
#if defined (SYS_munmap)
  syscall_table[SYS_munmap] = "munmap";
#endif
#if defined (SYS_fpathconf)
  syscall_table[SYS_fpathconf] = "fpathconf";
#endif
#if defined (SYS_vfork)
  syscall_table[SYS_vfork] = "vfork";
#endif
#if defined (SYS_fchdir)
  syscall_table[SYS_fchdir] = "fchdir";
#endif
#if defined (SYS_readv)
  syscall_table[SYS_readv] = "readv";
#endif
#if defined (SYS_writev)
  syscall_table[SYS_writev] = "writev";
#endif
#if defined (SYS_xstat)
  syscall_table[SYS_xstat] = "xstat";
#endif
#if defined (SYS_lxstat)
  syscall_table[SYS_lxstat] = "lxstat";
#endif
#if defined (SYS_fxstat)
  syscall_table[SYS_fxstat] = "fxstat";
#endif
#if defined (SYS_xmknod)
  syscall_table[SYS_xmknod] = "xmknod";
#endif
#if defined (SYS_clocal)
  syscall_table[SYS_clocal] = "clocal";
#endif
#if defined (SYS_setrlimit)
  syscall_table[SYS_setrlimit] = "setrlimit";
#endif
#if defined (SYS_getrlimit)
  syscall_table[SYS_getrlimit] = "getrlimit";
#endif
#if defined (SYS_lchown)
  syscall_table[SYS_lchown] = "lchown";
#endif
#if defined (SYS_memcntl)
  syscall_table[SYS_memcntl] = "memcntl";
#endif
#if defined (SYS_getpmsg)
  syscall_table[SYS_getpmsg] = "getpmsg";
#endif
#if defined (SYS_putpmsg)
  syscall_table[SYS_putpmsg] = "putpmsg";
#endif
#if defined (SYS_rename)
  syscall_table[SYS_rename] = "rename";
#endif
#if defined (SYS_uname)
  syscall_table[SYS_uname] = "uname";
#endif
#if defined (SYS_setegid)
  syscall_table[SYS_setegid] = "setegid";
#endif
#if defined (SYS_sysconfig)
  syscall_table[SYS_sysconfig] = "sysconfig";
#endif
#if defined (SYS_adjtime)
  syscall_table[SYS_adjtime] = "adjtime";
#endif
#if defined (SYS_systeminfo)
  syscall_table[SYS_systeminfo] = "systeminfo";
#endif
#if defined (SYS_seteuid)
  syscall_table[SYS_seteuid] = "seteuid";
#endif
}

/*

GLOBAL FUNCTION

	ptrace -- override library version to force errors for /proc version

SYNOPSIS

	int ptrace (int request, int pid, PTRACE_ARG3_TYPE arg3, int arg4)

DESCRIPTION

	When gdb is configured to use /proc, it should not be calling
	or otherwise attempting to use ptrace.  In order to catch errors
	where use of /proc is configured, but some routine is still calling
	ptrace, we provide a local version of a function with that name
	that does nothing but issue an error message.
*/

int
ptrace (request, pid, arg3, arg4)
     int request;
     int pid;
     PTRACE_ARG3_TYPE arg3;
     int arg4;
{
  error ("internal error - there is a call to ptrace() somewhere");
  /*NOTREACHED*/
}

/*

LOCAL FUNCTION

	procfs_kill_inferior - kill any currently inferior

SYNOPSIS

	void procfs_kill_inferior (void)

DESCRIPTION

	Kill any current inferior.

NOTES

	Kills even attached inferiors.  Presumably the user has already
	been prompted that the inferior is an attached one rather than
	one started by gdb.  (FIXME?)

*/

static void
procfs_kill_inferior ()
{
  if (inferior_pid != 0)
    {