text: /*
   * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
   *                     Linux for s390 port by D.J. Barrow
   *                    <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   *	$Id: syscall.c,v 1.79 2005/06/08 20:45:28 roland Exp $
   */
  
  #include "defs.h"
  
  #include <signal.h>
  #include <time.h>
  #include <errno.h>
  #ifndef HAVE_ANDROID_OS
  #include <sys/user.h>
  #endif
  #include <sys/syscall.h>
  #include <sys/param.h>
  
  #if HAVE_ASM_REG_H
  #if defined (SPARC) || defined (SPARC64)
  #  define fpq kernel_fpq
  #  define fq kernel_fq
  #  define fpu kernel_fpu
  #endif
  #include <asm/reg.h>
  #if defined (SPARC) || defined (SPARC64)
  #  undef fpq
  #  undef fq
  #  undef fpu
  #endif
  #endif
  
  #ifdef HAVE_SYS_REG_H
  #include <sys/reg.h>
  #ifndef PTRACE_PEEKUSR
  # define PTRACE_PEEKUSR PTRACE_PEEKUSER
  #endif
  #elif defined(HAVE_LINUX_PTRACE_H)
  #undef PTRACE_SYSCALL
  # ifdef HAVE_STRUCT_IA64_FPREG
  #  define ia64_fpreg XXX_ia64_fpreg
  # endif
  # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
  #  define pt_all_user_regs XXX_pt_all_user_regs
  # endif
  #include <linux/ptrace.h>
  # undef ia64_fpreg
  # undef pt_all_user_regs
  #endif
  
  #if defined (LINUX) && defined (SPARC64)
  # define r_pc r_tpc
  # undef PTRACE_GETREGS
  # define PTRACE_GETREGS PTRACE_GETREGS64
  # undef PTRACE_SETREGS
  # define PTRACE_SETREGS PTRACE_SETREGS64
  #endif /* LINUX && SPARC64 */
  
  #if defined(LINUX) && defined(IA64)
  # include <asm/ptrace_offsets.h>
  # include <asm/rse.h>
  #endif
  
  #define NR_SYSCALL_BASE 0
  #ifdef LINUX
  #ifndef ERESTARTSYS
  #define ERESTARTSYS	512
  #endif
  #ifndef ERESTARTNOINTR
  #define ERESTARTNOINTR	513
  #endif
  #ifndef ERESTARTNOHAND
  #define ERESTARTNOHAND	514	/* restart if no handler.. */
  #endif
  #ifndef ENOIOCTLCMD
  #define ENOIOCTLCMD	515	/* No ioctl command */
  #endif
  #ifndef ERESTART_RESTARTBLOCK
  #define ERESTART_RESTARTBLOCK 516	/* restart by calling sys_restart_syscall */
  #endif
  #ifndef NSIG
  #define NSIG 32
  #endif
  #ifdef ARM
  #undef NSIG
  #define NSIG 32
  #undef NR_SYSCALL_BASE
  #define NR_SYSCALL_BASE __NR_SYSCALL_BASE
  #endif
  #endif /* LINUX */
  
  #include "syscall-android.h"
  #include "syscall.h"
  
  /* Define these shorthand notations to simplify the syscallent files. */
  #define TF TRACE_FILE
  #define TI TRACE_IPC
  #define TN TRACE_NETWORK
  #define TP TRACE_PROCESS
  #define TS TRACE_SIGNAL
  
  static const struct sysent sysent0[] = {
  #include "syscallent.h"
  };
  static const int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
  int qual_flags0[MAX_QUALS];
  
  #if SUPPORTED_PERSONALITIES >= 2
  static const struct sysent sysent1[] = {
  #include "syscallent1.h"
  };
  static const int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
  int qual_flags1[MAX_QUALS];
  #endif /* SUPPORTED_PERSONALITIES >= 2 */
  
  #if SUPPORTED_PERSONALITIES >= 3
  static const struct sysent sysent2[] = {
  #include "syscallent2.h"
  };
  static const int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
  int qual_flags2[MAX_QUALS];
  #endif /* SUPPORTED_PERSONALITIES >= 3 */
  
  const struct sysent *sysent;
  int *qual_flags;
  int nsyscalls;
  
  /* Now undef them since short defines cause wicked namespace pollution. */
  #undef TF
  #undef TI
  #undef TN
  #undef TP
  #undef TS
  
  static const char *const errnoent0[] = {
  #include "errnoent.h"
  };
  static const int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
  
  #if SUPPORTED_PERSONALITIES >= 2
  static const char *const errnoent1[] = {
  #include "errnoent1.h"
  };
  static const int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
  #endif /* SUPPORTED_PERSONALITIES >= 2 */
  
  #if SUPPORTED_PERSONALITIES >= 3
  static const char *const errnoent2[] = {
  #include "errnoent2.h"
  };
  static const int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
  #endif /* SUPPORTED_PERSONALITIES >= 3 */
  
  const char *const *errnoent;
  int nerrnos;
  
  int current_personality;
  
  #ifndef PERSONALITY0_WORDSIZE
  # define PERSONALITY0_WORDSIZE sizeof(long)
  #endif
  const int personality_wordsize[SUPPORTED_PERSONALITIES] = {
  	PERSONALITY0_WORDSIZE,
  #if SUPPORTED_PERSONALITIES > 1
  	PERSONALITY1_WORDSIZE,
  #endif
  #if SUPPORTED_PERSONALITIES > 2
  	PERSONALITY2_WORDSIZE,
  #endif
  };;
  
  int
  set_personality(personality)
  int personality;
  {
  	switch (personality) {
  	case 0:
  		errnoent = errnoent0;
  		nerrnos = nerrnos0;
  		sysent = sysent0;
  		nsyscalls = nsyscalls0;
  		ioctlent = ioctlent0;
  		nioctlents = nioctlents0;
  		signalent = signalent0;
  		nsignals = nsignals0;
  		qual_flags = qual_flags0;
  		break;
  
  #if SUPPORTED_PERSONALITIES >= 2
  	case 1:
  		errnoent = errnoent1;
  		nerrnos = nerrnos1;
  		sysent = sysent1;
  		nsyscalls = nsyscalls1;
  		ioctlent = ioctlent1;
  		nioctlents = nioctlents1;
  		signalent = signalent1;
  		nsignals = nsignals1;
  		qual_flags = qual_flags1;
  		break;
  #endif /* SUPPORTED_PERSONALITIES >= 2 */
  
  #if SUPPORTED_PERSONALITIES >= 3
  	case 2:
  		errnoent = errnoent2;
  		nerrnos = nerrnos2;
  		sysent = sysent2;
  		nsyscalls = nsyscalls2;
  		ioctlent = ioctlent2;
  		nioctlents = nioctlents2;
  		signalent = signalent2;
  		nsignals = nsignals2;
  		qual_flags = qual_flags2;
  		break;
  #endif /* SUPPORTED_PERSONALITIES >= 3 */
  
  	default:
  		return -1;
  	}
  
  	current_personality = personality;
  	return 0;
  }
  
  
  struct call_counts {
  	struct timeval time;
  	int calls, errors;
  };
  
  static struct call_counts *counts;
  
  static struct timeval shortest = { 1000000, 0 };
  
  static int qual_syscall(), qual_signal(), qual_fault(), qual_desc();
  
  static const struct qual_options {
  	int bitflag;
  	char *option_name;
  	int (*qualify)();
  	char *argument_name;
  } qual_options[] = {
  	{ QUAL_TRACE,	"trace",	qual_syscall,	"system call"	},
  	{ QUAL_TRACE,	"t",		qual_syscall,	"system call"	},
  	{ QUAL_ABBREV,	"abbrev",	qual_syscall,	"system call"	},
  	{ QUAL_ABBREV,	"a",		qual_syscall,	"system call"	},
  	{ QUAL_VERBOSE,	"verbose",	qual_syscall,	"system call"	},
  	{ QUAL_VERBOSE,	"v",		qual_syscall,	"system call"	},
  	{ QUAL_RAW,	"raw",		qual_syscall,	"system call"	},
  	{ QUAL_RAW,	"x",		qual_syscall,	"system call"	},
  	{ QUAL_SIGNAL,	"signal",	qual_signal,	"signal"	},
  	{ QUAL_SIGNAL,	"signals",	qual_signal,	"signal"	},
  	{ QUAL_SIGNAL,	"s",		qual_signal,	"signal"	},
  	{ QUAL_FAULT,	"fault",	qual_fault,	"fault"		},
  	{ QUAL_FAULT,	"faults",	qual_fault,	"fault"		},
  	{ QUAL_FAULT,	"m",		qual_fault,	"fault"		},
  	{ QUAL_READ,	"read",		qual_desc,	"descriptor"	},
  	{ QUAL_READ,	"reads",	qual_desc,	"descriptor"	},
  	{ QUAL_READ,	"r",		qual_desc,	"descriptor"	},
  	{ QUAL_WRITE,	"write",	qual_desc,	"descriptor"	},
  	{ QUAL_WRITE,	"writes",	qual_desc,	"descriptor"	},
  	{ QUAL_WRITE,	"w",		qual_desc,	"descriptor"	},
  	{ 0,		NULL,		NULL,		NULL		},
  };
  
  static void
  qualify_one(n, opt, not, pers)
  	int n;
  	const struct qual_options *opt;
  	int not;
  	int pers;
  {
  	if (pers == 0 || pers < 0) {
  		if (not)
  			qual_flags0[n] &= ~opt->bitflag;
  		else
  			qual_flags0[n] |= opt->bitflag;
  	}
  
  #if SUPPORTED_PERSONALITIES >= 2
  	if (pers == 1 || pers < 0) {
  		if (not)
  			qual_flags1[n] &= ~opt->bitflag;
  		else
  			qual_flags1[n] |= opt->bitflag;
  	}
  #endif /* SUPPORTED_PERSONALITIES >= 2 */
  
  #if SUPPORTED_PERSONALITIES >= 3
  	if (pers == 2 || pers < 0) {
  		if (not)
  			qual_flags2[n] &= ~opt->bitflag;
  		else
  			qual_flags2[n] |= opt->bitflag;
  	}
  #endif /* SUPPORTED_PERSONALITIES >= 3 */
  }
  
  static int
  qual_syscall(s, opt, not)
  	char *s;
  	const struct qual_options *opt;
  	int not;
  {
  	int i;
  	int rc = -1;
  
    	if (isdigit((unsigned char)*s)) {
   		int i = atoi(s);
  		if (i < 0 || i >= MAX_QUALS)
   			return -1;
   		qualify_one(i, opt, not, -1);
   		return 0;
  	}
  	for (i = 0; i < nsyscalls0; i++)
  		if (strcmp(s, sysent0[i].sys_name) == 0) {
  			qualify_one(i, opt, not, 0);
  			rc = 0;
  		}
  
  #if SUPPORTED_PERSONALITIES >= 2
  	for (i = 0; i < nsyscalls1; i++)
  		if (strcmp(s, sysent1[i].sys_name) == 0) {
  			qualify_one(i, opt, not, 1);
  			rc = 0;
  		}
  #endif /* SUPPORTED_PERSONALITIES >= 2 */
  
  #if SUPPORTED_PERSONALITIES >= 3
  	for (i = 0; i < nsyscalls2; i++)
  		if (strcmp(s, sysent2[i].sys_name) == 0) {
  			qualify_one(i, opt, not, 2);
  			rc = 0;
  		}
  #endif /* SUPPORTED_PERSONALITIES >= 3 */
  
  	return rc;
  }
  
  static int
  qual_signal(s, opt, not)
  	char *s;
  	const struct qual_options *opt;
  	int not;
  {
  	int i;
  	char buf[32];
  
    	if (isdigit((unsigned char)*s)) {
   		int signo = atoi(s);
   		if (signo < 0 || signo >= MAX_QUALS)
   			return -1;
   		qualify_one(signo, opt, not, -1);
   		return 0;
  	}
  	if (strlen(s) >= sizeof buf)
  		return -1;
  	strcpy(buf, s);
  	s = buf;
  	for (i = 0; s[i]; i++)
  		s[i] = toupper((unsigned char)(s[i]));
  	if (strncmp(s, "SIG", 3) == 0)
  		s += 3;
  	for (i = 0; i <= NSIG; i++)
  		if (strcmp(s, signame(i) + 3) == 0) {
  			qualify_one(i, opt, not, -1);
  			return 0;
  		}
  	return -1;
  }
  
  static int
  qual_fault(s, opt, not)
  	char *s;
  	const struct qual_options *opt;
  	int not;
  {
  	return -1;
  }
  
  static int
  qual_desc(s, opt, not)
  	char *s;
  	const struct qual_options *opt;
  	int not;
  {
  	if (isdigit((unsigned char)*s)) {
  		int desc = atoi(s);
  		if (desc < 0 || desc >= MAX_QUALS)
  			return -1;
  		qualify_one(desc, opt, not, -1);
  		return 0;
  	}
  	return -1;
  }
  
  static int
  lookup_class(s)
  	char *s;
  {
  	if (strcmp(s, "file") == 0)
  		return TRACE_FILE;
  	if (strcmp(s, "ipc") == 0)
  		return TRACE_IPC;
  	if (strcmp(s, "network") == 0)
  		return TRACE_NETWORK;
  	if (strcmp(s, "process") == 0)
  		return TRACE_PROCESS;
  	if (strcmp(s, "signal") == 0)
  		return TRACE_SIGNAL;
  	return -1;
  }
  
  void
  qualify(s)
  char *s;
  {
  	const struct qual_options *opt;
  	int not;
  	char *p;
  	int i, n;
  
  	opt = &qual_options[0];
  	for (i = 0; (p = qual_options[i].option_name); i++) {
  		n = strlen(p);
  		if (strncmp(s, p, n) == 0 && s[n] == '=') {
  			opt = &qual_options[i];
  			s += n + 1;
  			break;
  		}
  	}
  	not = 0;
  	if (*s == '!') {
  		not = 1;
  		s++;
  	}
  	if (strcmp(s, "none") == 0) {
  		not = 1 - not;
  		s = "all";
  	}
  	if (strcmp(s, "all") == 0) {
  		for (i = 0; i < MAX_QUALS; i++) {
  			qualify_one(i, opt, not, -1);
  		}
  		return;
  	}
  	for (i = 0; i < MAX_QUALS; i++) {
  		qualify_one(i, opt, !not, -1);
  	}
  	for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
  		if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
  			for (i = 0; i < nsyscalls0; i++)
  				if (sysent0[i].sys_flags & n)
  					qualify_one(i, opt, not, 0);
  
  #if SUPPORTED_PERSONALITIES >= 2
  			for (i = 0; i < nsyscalls1; i++)
  				if (sysent1[i].sys_flags & n)
  					qualify_one(i, opt, not, 1);
  #endif /* SUPPORTED_PERSONALITIES >= 2 */
  
  #if SUPPORTED_PERSONALITIES >= 3
  			for (i = 0; i < nsyscalls2; i++)
  				if (sysent2[i].sys_flags & n)
  					qualify_one(i, opt, not, 2);
  #endif /* SUPPORTED_PERSONALITIES >= 3 */
  
  			continue;
  		}
  		if (opt->qualify(p, opt, not)) {
  			fprintf(stderr, "strace: invalid %s `%s'\n",
  				opt->argument_name, p);
  			exit(1);
  		}
  	}
  	return;
  }
  
  static void
  dumpio(tcp)
  struct tcb *tcp;
  {
  	if (syserror(tcp))
  		return;
  	if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
  		return;
  	switch (known_scno(tcp)) {
  	case SYS_read:
  #ifdef SYS_pread64
  	case SYS_pread64:
  #endif
  #if defined SYS_pread && SYS_pread64 != SYS_pread
  	case SYS_pread:
  #endif
  #ifdef SYS_recv
  	case SYS_recv:
  #elif defined SYS_sub_recv
  	case SYS_sub_recv:
  #endif
  #ifdef SYS_recvfrom
  	case SYS_recvfrom:
  #elif defined SYS_sub_recvfrom
  	case SYS_sub_recvfrom:
  #endif
  		if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
  			dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
  		break;
  	case SYS_write:
  #ifdef SYS_pwrite64
  	case SYS_pwrite64:
  #endif
  #if defined SYS_pwrite && SYS_pwrite64 != SYS_pwrite
  	case SYS_pwrite:
  #endif
  #ifdef SYS_send
  	case SYS_send:
  #elif defined SYS_sub_send
  	case SYS_sub_send:
  #endif
  #ifdef SYS_sendto
  	case SYS_sendto:
  #elif defined SYS_sub_sendto
  	case SYS_sub_sendto:
  #endif
  		if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
  			dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
  		break;
  #ifdef SYS_readv
          case SYS_readv:
                  if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
                          dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
                  break;
  #endif
  #ifdef SYS_writev
          case SYS_writev:
  
                  if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
                          dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
                  break;
  #endif
  	}
  }
  
  #ifndef FREEBSD
  enum subcall_style { shift_style, deref_style, mask_style, door_style };
  #else /* FREEBSD */
  enum subcall_style { shift_style, deref_style, mask_style, door_style, table_style };
  
  struct subcall {
    int call;
    int nsubcalls;
    int subcalls[5];
  };
  
  static const struct subcall subcalls_table[] = {
    { SYS_shmsys, 5, { SYS_shmat, SYS_shmctl, SYS_shmdt, SYS_shmget, SYS_shmctl } },
  #ifdef SYS_semconfig
    { SYS_semsys, 4, { SYS___semctl, SYS_semget, SYS_semop, SYS_semconfig } },
  #else
    { SYS_semsys, 3, { SYS___semctl, SYS_semget, SYS_semop } },
  #endif
    { SYS_msgsys, 4, { SYS_msgctl, SYS_msgget, SYS_msgsnd, SYS_msgrcv } },
  };
  #endif /* FREEBSD */
  
  #if !(defined(LINUX) && ( defined(ALPHA) || defined(MIPS) ))
  
  static const int socket_map [] = {
  	       /* SYS_SOCKET      */ 97,
  	       /* SYS_BIND        */ 104,
  	       /* SYS_CONNECT     */ 98,
  	       /* SYS_LISTEN      */ 106,
  	       /* SYS_ACCEPT      */ 99,
  	       /* SYS_GETSOCKNAME */ 150,
  	       /* SYS_GETPEERNAME */ 141,
  	       /* SYS_SOCKETPAIR  */ 135,
  	       /* SYS_SEND        */ 101,
  	       /* SYS_RECV        */ 102,
  	       /* SYS_SENDTO      */ 133,
  	       /* SYS_RECVFROM    */ 125,
  	       /* SYS_SHUTDOWN    */ 134,
  	       /* SYS_SETSOCKOPT  */ 105,
  	       /* SYS_GETSOCKOPT  */ 118,
  	       /* SYS_SENDMSG     */ 114,
  	       /* SYS_RECVMSG     */ 113
  };
  
  #if defined (SPARC) || defined (SPARC64)
  static void
  sparc_socket_decode (tcp)
  struct tcb *tcp;
  {
  	volatile long addr;
  	volatile int i, n;
  
  	if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
  		return;
  	}
  	tcp->scno = socket_map [tcp->u_arg [0]-1];
  	n = tcp->u_nargs = sysent [tcp->scno].nargs;
  	addr = tcp->u_arg [1];
  	for (i = 0; i < n; i++){
  	        int arg;
  		if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
  			arg = 0;
  		tcp->u_arg [i] = arg;
  		addr += sizeof (arg);
  	}
  }
  #endif
  
  static void
  decode_subcall(tcp, subcall, nsubcalls, style)
  struct tcb *tcp;
  int subcall;
  int nsubcalls;
  enum subcall_style style;
  {
  	unsigned long addr, mask;
  	int i;
  	int size = personality_wordsize[current_personality];
  
  	switch (style) {
  	case shift_style:
  		if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
  			return;
  		tcp->scno = subcall + tcp->u_arg[0];
  		if (sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
  			tcp->u_nargs--;
  		for (i = 0; i < tcp->u_nargs; i++)
  			tcp->u_arg[i] = tcp->u_arg[i + 1];
  		break;
  	case deref_style:
  		if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
  			return;
  		tcp->scno = subcall + tcp->u_arg[0];
  		addr = tcp->u_arg[1];
  		for (i = 0; i < sysent[tcp->scno].nargs; i++) {
  			if (size == sizeof(int)) {
  				unsigned int arg;
  				if (umove(tcp, addr, &arg) < 0)
  					arg = 0;
  				tcp->u_arg[i] = arg;
  			}
  			else if (size == sizeof(long)) {
  				unsigned long arg;
  				if (umove(tcp, addr, &arg) < 0)
  					arg = 0;
  				tcp->u_arg[i] = arg;
  			}
  			else
  				abort();
  			addr += size;
  		}
  		tcp->u_nargs = sysent[tcp->scno].nargs;
  		break;
  	case mask_style:
  		mask = (tcp->u_arg[0] >> 8) & 0xff;
  		for (i = 0; mask; i++)
  			mask >>= 1;
  		if (i >= nsubcalls)
  			return;
  		tcp->u_arg[0] &= 0xff;
  		tcp->scno = subcall + i;
  		if (sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		break;
  	case door_style:
  		/*
  		 * Oh, yuck.  The call code is the *sixth* argument.
  		 * (don't you mean the *last* argument? - JH)
  		 */
  		if (tcp->u_arg[5] < 0 || tcp->u_arg[5] >= nsubcalls)
  			return;
  		tcp->scno = subcall + tcp->u_arg[5];
  		if (sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
  			tcp->u_nargs--;
  		break;
  #ifdef FREEBSD
  	case table_style:
  		for (i = 0; i < sizeof(subcalls_table) / sizeof(struct subcall); i++)
  			if (subcalls_table[i].call == tcp->scno) break;
  		if (i < sizeof(subcalls_table) / sizeof(struct subcall) &&
  		    tcp->u_arg[0] >= 0 && tcp->u_arg[0] < subcalls_table[i].nsubcalls) {
  			tcp->scno = subcalls_table[i].subcalls[tcp->u_arg[0]];
  			for (i = 0; i < tcp->u_nargs; i++)
  				tcp->u_arg[i] = tcp->u_arg[i + 1];
  		}
  		break;
  #endif /* FREEBSD */
  	}
  }
  #endif
  
  struct tcb *tcp_last = NULL;
  
  static int
  internal_syscall(tcp)
  struct tcb *tcp;
  {
  	/*
  	 * We must always trace a few critical system calls in order to
  	 * correctly support following forks in the presence of tracing
  	 * qualifiers.
  	 */
  	switch (known_scno(tcp)) {
  #ifdef SYS_fork
  	case SYS_fork:
  #endif
  #ifdef SYS_vfork
  	case SYS_vfork:
  #endif
  #ifdef SYS_fork1
  	case SYS_fork1:
  #endif
  #ifdef SYS_forkall
  	case SYS_forkall:
  #endif
  #ifdef SYS_rfork1
  	case SYS_rfork1:
  #endif
  #ifdef SYS_rforkall
  	case SYS_rforkall:
  #endif
  #ifdef SYS_rfork
  	case SYS_rfork:
  #endif
  		internal_fork(tcp);
  		break;
  #ifdef SYS_clone
  	case SYS_clone:
  		internal_clone(tcp);
  		break;
  #endif
  #ifdef SYS_clone2
  	case SYS_clone2:
  		internal_clone(tcp);
  		break;
  #endif
  #ifdef SYS_execv
  	case SYS_execv:
  #endif
  #ifdef SYS_execve
  	case SYS_execve:
  #endif
  #ifdef SYS_rexecve
  	case SYS_rexecve:
  #endif
  		internal_exec(tcp);
  		break;
  
  #ifdef SYS_wait
  	case SYS_wait:
  #endif
  #ifdef SYS_wait4
  	case SYS_wait4:
  #endif
  #ifdef SYS32_wait4
  	case SYS32_wait4:
  #endif
  #ifdef SYS_waitpid
  	case SYS_waitpid:
  #endif
  #ifdef SYS_waitsys
  	case SYS_waitsys:
  #endif
  		internal_wait(tcp, 2);
  		break;
  #ifdef SYS_waitid
  	case SYS_waitid:
  		internal_wait(tcp, 3);
  		break;
  #endif
  
  #ifdef SYS_exit
  	case SYS_exit:
  #endif
  #ifdef SYS32_exit
  	case SYS32_exit:
  #endif
  #ifdef __NR_exit_group
  	case __NR_exit_group:
  #endif
  #ifdef IA64
  	case 252: /* IA-32 __NR_exit_group */
  #endif
  		internal_exit(tcp);
  		break;
  	}
  	return 0;
  }
  
  
  #ifdef LINUX
  #if defined (I386)
  	static long eax;
  #elif defined (IA64)
  	long r8, r10, psr;
  	long ia32 = 0;
  #elif defined (POWERPC)
  	static long result,flags;
  #elif defined (M68K)
  	static int d0;
  #elif defined (ARM)
  	static struct pt_regs regs;
  #elif defined (ALPHA)
  	static long r0;
  	static long a3;
  #elif defined (SPARC) || defined (SPARC64)
  	static struct regs regs;
  	static unsigned long trap;
  #elif defined(MIPS)
  	static long a3;
  	static long r2;
  #elif defined(S390) || defined(S390X)
  	static long gpr2;
  	static long pc;
  	static long syscall_mode;
  #elif defined(HPPA)
  	static long r28;
  #elif defined(SH)
         static long r0;
  #elif defined(SH64)
         static long r9;
  #elif defined(X86_64)
         static long rax;
  #endif
  #endif /* LINUX */
  #ifdef FREEBSD
  	struct reg regs;
  #endif /* FREEBSD */
  
  int
  get_scno(tcp)
  struct tcb *tcp;
  {
  	long scno = 0;
  #ifndef USE_PROCFS
  	int pid = tcp->pid;
  #endif /* !PROCFS */
  
  #ifdef LINUX
  #if defined(S390) || defined(S390X)
  	if (tcp->flags & TCB_WAITEXECVE) {
  		/*
  		 * When the execve system call completes successfully, the
  		 * new process still has -ENOSYS (old style) or __NR_execve
  		 * (new style) in gpr2.  We cannot recover the scno again
  		 * by disassembly, because the image that executed the
  		 * syscall is gone now.  Fortunately, we don't want it.  We
  		 * leave the flag set so that syscall_fixup can fake the
  		 * result.
  		 */
  		if (tcp->flags & TCB_INSYSCALL)
  			return 1;
  		/*
  		 * This is the SIGTRAP after execve.  We cannot try to read
  		 * the system call here either.
  		 */
  		tcp->flags &= ~TCB_WAITEXECVE;
  		return 0;
  	}
  
  	if (upeek(pid, PT_GPR2, &syscall_mode) < 0)
  			return -1;
  
  	if (syscall_mode != -ENOSYS) {
  		/*
   		 * Since kernel version 2.5.44 the scno gets passed in gpr2.
  		 */
  		scno = syscall_mode;
  	} else {
  	       	/*
  		 * Old style of "passing" the scno via the SVC instruction.
  		 */
  
  		long opcode, offset_reg, tmp;
  		void * svc_addr;
  		int gpr_offset[16] = {PT_GPR0,  PT_GPR1,  PT_ORIGGPR2, PT_GPR3,
  				      PT_GPR4,  PT_GPR5,  PT_GPR6,     PT_GPR7,
  				      PT_GPR8,  PT_GPR9,  PT_GPR10,    PT_GPR11,
  				      PT_GPR12, PT_GPR13, PT_GPR14,    PT_GPR15};
  
  		if (upeek(pid, PT_PSWADDR, &pc) < 0)
  			return -1;
  		errno = 0;
  		opcode = ptrace(PTRACE_PEEKTEXT, pid, (char *)(pc-sizeof(long)), 0);
  		if (errno) {
  			perror("peektext(pc-oneword)");
  			return -1;
  		}
  
  		/*
  		 *  We have to check if the SVC got executed directly or via an
  		 *  EXECUTE instruction. In case of EXECUTE it is necessary to do
  		 *  instruction decoding to derive the system call number.
  		 *  Unfortunately the opcode sizes of EXECUTE and SVC are differently,
  		 *  so that this doesn't work if a SVC opcode is part of an EXECUTE
  		 *  opcode. Since there is no way to find out the opcode size this
  		 *  is the best we can do...
  		 */
  
  		if ((opcode & 0xff00) == 0x0a00) {
  			/* SVC opcode */
  			scno = opcode & 0xff;
  		}
  		else {
  			/* SVC got executed by EXECUTE instruction */
  
  			/*
  			 *  Do instruction decoding of EXECUTE. If you really want to
  			 *  understand this, read the Principles of Operations.
  			 */
  			svc_addr = (void *) (opcode & 0xfff);
  
  			tmp = 0;
  			offset_reg = (opcode & 0x000f0000) >> 16;
  			if (offset_reg && (upeek(pid, gpr_offset[offset_reg], &tmp) < 0))
  				return -1;
  			svc_addr += tmp;
  
  			tmp = 0;
  			offset_reg = (opcode & 0x0000f000) >> 12;
  			if (offset_reg && (upeek(pid, gpr_offset[offset_reg], &tmp) < 0))
  				return -1;
  			svc_addr += tmp;
  
  			scno = ptrace(PTRACE_PEEKTEXT, pid, svc_addr, 0);
  			if (errno)
  				return -1;
  #if defined(S390X)
  			scno >>= 48;
  #else
  			scno >>= 16;
  #endif
  			tmp = 0;
  			offset_reg = (opcode & 0x00f00000) >> 20;
  			if (offset_reg && (upeek(pid, gpr_offset[offset_reg], &tmp) < 0))
  				return -1;
  
  			scno = (scno | tmp) & 0xff;
  		}
  	}
  #elif defined (POWERPC)
  	if (upeek(pid, sizeof(unsigned long)*PT_R0, &scno) < 0)
  		return -1;
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  		/* Check if we return from execve. */
  		if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
  			tcp->flags &= ~TCB_WAITEXECVE;
  			return 0;
  		}
  	}
  #elif defined (I386)
  	if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
  		return -1;
  #elif defined (X86_64)
  	if (upeek(pid, 8*ORIG_RAX, &scno) < 0)
  		return -1;
  
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  	  	static int currpers=-1;
  		long val;
  
  		/* Check CS register value. On x86-64 linux it is:
  		 * 	0x33	for long mode (64 bit)
  		 * 	0x23	for compatibility mode (32 bit)
  		 * It takes only one ptrace and thus doesn't need
  		 * to be cached.
  		 */
  		if (upeek(pid, 8*CS, &val) < 0)
  			return -1;
  		switch(val)
  		{
  			case 0x23: currpers = 1; break;
  			case 0x33: currpers = 0; break;
  			default:
  				fprintf(stderr, "Unknown value CS=0x%02X while "
  					 "detecting personality of process "
  					 "PID=%d\n", (int)val, pid);
  				currpers = current_personality;
  				break;
  		}
  #if 0
  		/* This version analyzes the opcode of a syscall instruction.
  		 * (int 0x80 on i386 vs. syscall on x86-64)
  		 * It works, but is too complicated.
  		 */
  		unsigned long val, rip, i;
  
  		if(upeek(pid, 8*RIP, &rip)<0)
  			perror("upeek(RIP)");
  
  		/* sizeof(syscall) == sizeof(int 0x80) == 2 */
  		rip-=2;
  		errno = 0;
  
  		call = ptrace(PTRACE_PEEKTEXT,pid,(char *)rip,0);
  		if (errno)
  			printf("ptrace_peektext failed: %s\n",
  					strerror(errno));
  		switch (call & 0xffff)
  		{
  			/* x86-64: syscall = 0x0f 0x05 */
  			case 0x050f: currpers = 0; break;
  			/* i386: int 0x80 = 0xcd 0x80 */
  			case 0x80cd: currpers = 1; break;
  			default:
  				currpers = current_personality;
  				fprintf(stderr,
  					"Unknown syscall opcode (0x%04X) while "
  					"detecting personality of process "
  					"PID=%d\n", (int)call, pid);
  				break;
  		}
  #endif
  		if(currpers != current_personality)
  		{
  			char *names[]={"64 bit", "32 bit"};
  			set_personality(currpers);
  			printf("[ Process PID=%d runs in %s mode. ]\n",
  					pid, names[current_personality]);
  		}
  	}
  #elif defined(IA64)
  #	define IA64_PSR_IS	((long)1 << 34)
  	if (upeek (pid, PT_CR_IPSR, &psr) >= 0)
  		ia32 = (psr & IA64_PSR_IS) != 0;
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  		if (ia32) {
  			if (upeek(pid, PT_R1, &scno) < 0)	/* orig eax */
  				return -1;
  		} else {
  			if (upeek (pid, PT_R15, &scno) < 0)
  				return -1;
  		}
  		/* Check if we return from execve. */
  		if (tcp->flags & TCB_WAITEXECVE) {
  			tcp->flags &= ~TCB_WAITEXECVE;
  			return 0;
  		}
  	} else {
  		/* syscall in progress */
  		if (upeek (pid, PT_R8, &r8) < 0)
  			return -1;
  		if (upeek (pid, PT_R10, &r10) < 0)
  			return -1;
  	}
  #elif defined (ARM)
  	/*
  	 * Read complete register set in one go.
  	 */
  	if (ptrace(PTRACE_GETREGS, pid, NULL, (void *)&regs) == -1)
  		return -1;
  
  	/*
  	 * We only need to grab the syscall number on syscall entry.
  	 */
  	if (regs.ARM_ip == 0) {
  		if (!(tcp->flags & TCB_INSYSCALL)) {
  			/* Check if we return from execve. */
  			if (tcp->flags & TCB_WAITEXECVE) {
  				tcp->flags &= ~TCB_WAITEXECVE;
  				return 0;
  			}
  		}
  
  		/*
  		 * Note: we only deal with only 32-bit CPUs here.
  		 */
  		if (regs.ARM_cpsr & 0x20) {
  			/*
  			 * Get the Thumb-mode system call number
  			 */
  			scno = regs.ARM_r7;
  		} else {
  			/*
  			 * Get the ARM-mode system call number
  			 */
  			errno = 0;
  			scno = ptrace(PTRACE_PEEKTEXT, pid, (void *)(regs.ARM_pc - 4), NULL);
  			if (errno)
  				return -1;
  
  			if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
  				tcp->flags &= ~TCB_WAITEXECVE;
  				return 0;
  			}
  
  			/* Handle the EABI syscall convention.  We do not
  			   bother converting structures between the two
  			   ABIs, but basic functionality should work even
  			   if strace and the traced program have different
  			   ABIs.  */
  			if (scno == 0xef000000) {
  				scno = regs.ARM_r7;
  			} else {
  				if ((scno & 0x0ff00000) != 0x0f900000) {
  					fprintf(stderr, "syscall: unknown syscall trap 0x%08lx\n",
  						scno);
  					return -1;
  				}
  
  				/*
  				 * Fixup the syscall number
  				 */
  				scno &= 0x000fffff;
  			}
  		}
  
  		if (tcp->flags & TCB_INSYSCALL) {
  			fprintf(stderr, "pid %d stray syscall entry\n", tcp->pid);
  			tcp->flags &= ~TCB_INSYSCALL;
  		}
  	} else {
  		if (!(tcp->flags & TCB_INSYSCALL)) {
  			fprintf(stderr, "pid %d stray syscall exit\n", tcp->pid);
  			tcp->flags |= TCB_INSYSCALL;
  		}
  	}
  #elif defined (M68K)
  	if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
  		return -1;
  #elif defined (MIPS)
  	if (upeek(pid, REG_A3, &a3) < 0)
  	  	return -1;
  
  	if(!(tcp->flags & TCB_INSYSCALL)) {
  	  	if (upeek(pid, REG_V0, &scno) < 0)
  		  	return -1;
  
  		if (scno < 0 || scno > nsyscalls) {
  			if(a3 == 0 || a3 == -1) {
  				if(debug)
  					fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno);
  				return 0;
  			}
  		}
  	} else {
  	  	if (upeek(pid, REG_V0, &r2) < 0)
  	    		return -1;
  	}
  #elif defined (ALPHA)
  	if (upeek(pid, REG_A3, &a3) < 0)
  		return -1;
  
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  		if (upeek(pid, REG_R0, &scno) < 0)
  			return -1;
  
  		/* Check if we return from execve. */
  		if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
  			tcp->flags &= ~TCB_WAITEXECVE;
  			return 0;
  		}
  
  		/*
  		 * Do some sanity checks to figure out if it's
  		 * really a syscall entry
  		 */
  		if (scno < 0 || scno > nsyscalls) {
  			if (a3 == 0 || a3 == -1) {
  				if (debug)
  					fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
  				return 0;
  			}
  		}
  	}
  	else {
  		if (upeek(pid, REG_R0, &r0) < 0)
  			return -1;
  	}
  #elif defined (SPARC) || defined (SPARC64)
  	/* Everything we need is in the current register set. */
  	if (ptrace(PTRACE_GETREGS,pid,(char *)&regs,0) < 0)
  		return -1;
  
          /* If we are entering, then disassemble the syscall trap. */
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  		/* Retrieve the syscall trap instruction. */
  		errno = 0;
  		trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.r_pc,0);
  #if defined(SPARC64)
  		trap >>= 32;
  #endif
  		if (errno)
  			return -1;
  
  		/* Disassemble the trap to see what personality to use. */
  		switch (trap) {
  		case 0x91d02010:
  			/* Linux/SPARC syscall trap. */
  			set_personality(0);
  			break;
  		case 0x91d0206d:
  			/* Linux/SPARC64 syscall trap. */
  			set_personality(2);
  			break;
  		case 0x91d02000:
  			/* SunOS syscall trap. (pers 1) */
  			fprintf(stderr,"syscall: SunOS no support\n");
  			return -1;
  		case 0x91d02008:
  			/* Solaris 2.x syscall trap. (per 2) */
  			set_personality(1);
  			break;
  		case 0x91d02009:
  			/* NetBSD/FreeBSD syscall trap. */
  			fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
  			return -1;
  		case 0x91d02027:
  			/* Solaris 2.x gettimeofday */
  			set_personality(1);
  			break;
  		default:
  			/* Unknown syscall trap. */
  			if(tcp->flags & TCB_WAITEXECVE) {
  				tcp->flags &= ~TCB_WAITEXECVE;
  				return 0;
  			}
  #if defined (SPARC64)
  			fprintf(stderr,"syscall: unknown syscall trap %08lx %016lx\n", trap, regs.r_tpc);
  #else
  			fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.r_pc);
  #endif
  			return -1;
  		}
  
  		/* Extract the system call number from the registers. */
  		if (trap == 0x91d02027)
  			scno = 156;
  		else
  			scno = regs.r_g1;
  		if (scno == 0) {
  			scno = regs.r_o0;
  			memmove (&regs.r_o0, &regs.r_o1, 7*sizeof(regs.r_o0));
  		}
  	}
  #elif defined(HPPA)
  	if (upeek(pid, PT_GR20, &scno) < 0)
  		return -1;
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  		/* Check if we return from execve. */
  		if ((tcp->flags & TCB_WAITEXECVE)) {
  			tcp->flags &= ~TCB_WAITEXECVE;
  			return 0;
  		}
  	}
  #elif defined(SH)
         /*
          * In the new syscall ABI, the system call number is in R3.
          */
         if (upeek(pid, 4*(REG_REG0+3), &scno) < 0)
                 return -1;
  
         if (scno < 0) {
             /* Odd as it may seem, a glibc bug has been known to cause
                glibc to issue bogus negative syscall numbers.  So for
                our purposes, make strace print what it *should* have been */
             long correct_scno = (scno & 0xff);
             if (debug)
                 fprintf(stderr,
                     "Detected glibc bug: bogus system call number = %ld, "
  		   "correcting to %ld\n",
                     scno,
                     correct_scno);
             scno = correct_scno;
         }
  
  
         if (!(tcp->flags & TCB_INSYSCALL)) {
                 /* Check if we return from execve. */
                 if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
                         tcp->flags &= ~TCB_WAITEXECVE;
                         return 0;
                 }
         }
  #elif defined(SH64)
  	if (upeek(pid, REG_SYSCALL, &scno) < 0)
  		return -1;
          scno &= 0xFFFF;
  
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  		/* Check if we return from execve. */
  		if (tcp->flags & TCB_WAITEXECVE) {
  			tcp->flags &= ~TCB_WAITEXECVE;
  			return 0;
  		}
  	}
  #endif /* SH64 */
  #endif /* LINUX */
  #ifdef SUNOS4
  	if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
  		return -1;
  #elif defined(SH)
          /* new syscall ABI returns result in R0 */
          if (upeek(pid, 4*REG_REG0, (long *)&r0) < 0)
                  return -1;
  #elif defined(SH64)
          /* ABI defines result returned in r9 */
          if (upeek(pid, REG_GENERAL(9), (long *)&r9) < 0)
                  return -1;
  
  #endif
  #ifdef USE_PROCFS
  #ifdef HAVE_PR_SYSCALL
  	scno = tcp->status.PR_SYSCALL;
  #else /* !HAVE_PR_SYSCALL */
  #ifndef FREEBSD
  	scno = tcp->status.PR_WHAT;
  #else /* FREEBSD */
  	if (pread(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
  	        perror("pread");
                  return -1;
          }
  	switch (regs.r_eax) {
  	case SYS_syscall:
  	case SYS___syscall:
      	        pread(tcp->pfd, &scno, sizeof(scno), regs.r_esp + sizeof(int));
  	        break;
  	default:
  	        scno = regs.r_eax;
  	        break;
  	}
  #endif /* FREEBSD */
  #endif /* !HAVE_PR_SYSCALL */
  #endif /* USE_PROCFS */
  	if (!(tcp->flags & TCB_INSYSCALL))
  		tcp->scno = scno;
  	return 1;
  }
  
  
  long
  known_scno(tcp)
  struct tcb *tcp;
  {
  	long scno = tcp->scno;
  	if (scno >= 0 && scno < nsyscalls && sysent[scno].native_scno != 0)
  		scno = sysent[scno].native_scno;
  	else
  		scno += NR_SYSCALL_BASE;
  	return scno;
  }
  
  static int
  syscall_fixup(tcp)
  struct tcb *tcp;
  {
  #ifndef USE_PROCFS
  	int pid = tcp->pid;
  #else /* USE_PROCFS */
  	int scno = known_scno(tcp);
  
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  		if (tcp->status.PR_WHY != PR_SYSENTRY) {
  			if (
  			    scno == SYS_fork
  #ifdef SYS_vfork
  			    || scno == SYS_vfork
  #endif /* SYS_vfork */
  #ifdef SYS_fork1
  			    || scno == SYS_fork1
  #endif /* SYS_fork1 */
  #ifdef SYS_forkall
  			    || scno == SYS_forkall
  #endif /* SYS_forkall */
  #ifdef SYS_rfork1
  			    || scno == SYS_rfork1
  #endif /* SYS_fork1 */
  #ifdef SYS_rforkall
  			    || scno == SYS_rforkall
  #endif /* SYS_rforkall */
  			    ) {
  				/* We are returning in the child, fake it. */
  				tcp->status.PR_WHY = PR_SYSENTRY;
  				trace_syscall(tcp);
  				tcp->status.PR_WHY = PR_SYSEXIT;
  			}
  			else {
  				fprintf(stderr, "syscall: missing entry\n");
  				tcp->flags |= TCB_INSYSCALL;
  			}
  		}
  	}
  	else {
  		if (tcp->status.PR_WHY != PR_SYSEXIT) {
  			fprintf(stderr, "syscall: missing exit\n");
  			tcp->flags &= ~TCB_INSYSCALL;
  		}
  	}
  #endif /* USE_PROCFS */
  #ifdef SUNOS4
  	if (!(tcp->flags & TCB_INSYSCALL)) {
  		if (scno == 0) {
  			fprintf(stderr, "syscall: missing entry\n");
  			tcp->flags |= TCB_INSYSCALL;
  		}
  	}
  	else {
  		if (scno != 0) {
  			if (debug) {
  				/*
  				 * This happens when a signal handler
  				 * for a signal which interrupted a
  				 * a system call makes another system call.
  				 */
  				fprintf(stderr, "syscall: missing exit\n");
  			}
  			tcp->flags &= ~TCB_INSYSCALL;
  		}
  	}
  #endif /* SUNOS4 */
  #ifdef LINUX
  #if defined (I386)
  	if (upeek(pid, 4*EAX, &eax) < 0)
  		return -1;
  	if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
  		if (debug)
  			fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
  		return 0;
  	}
  #elif defined (X86_64)
  	if (upeek(pid, 8*RAX, &rax) < 0)
  		return -1;
  	if (current_personality == 1)
  		rax = (long int)(int)rax; /* sign extend from 32 bits */
  	if (rax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
  		if (debug)
  			fprintf(stderr, "stray syscall exit: rax = %ld\n", rax);
  		return 0;
  	}
  #elif defined (S390) || defined (S390X)
  	if (upeek(pid, PT_GPR2, &gpr2) < 0)
  		return -1;
  	if (syscall_mode != -ENOSYS)
  		syscall_mode = tcp->scno;
  	if (gpr2 != syscall_mode && !(tcp->flags & TCB_INSYSCALL)) {
  		if (debug)
  			fprintf(stderr, "stray syscall exit: gpr2 = %ld\n", gpr2);
  		return 0;
  	}
  	else if (((tcp->flags & (TCB_INSYSCALL|TCB_WAITEXECVE))
  		  == (TCB_INSYSCALL|TCB_WAITEXECVE))
  		 && (gpr2 == -ENOSYS || gpr2 == tcp->scno)) {
  		/*
  		 * Fake a return value of zero.  We leave the TCB_WAITEXECVE
  		 * flag set for the post-execve SIGTRAP to see and reset.
  		 */
  		gpr2 = 0;
  	}
  #elif defined (POWERPC)
  # define SO_MASK 0x10000000
  	if (upeek(pid, sizeof(unsigned long)*PT_CCR, &flags) < 0)
  		return -1;
  	if (upeek(pid, sizeof(unsigned long)*PT_R3, &result) < 0)
  		return -1;
  	if (flags & SO_MASK)
  		result = -result;
  #elif defined (M68K)
  	if (upeek(pid, 4*PT_D0, &d0) < 0)
  		return -1;
  	if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
  		if (debug)
  			fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
  		return 0;
  	}
  #elif defined (ARM)
  	/*
  	 * Nothing required
  	 */
  #elif defined (HPPA)
  	if (upeek(pid, PT_GR28, &r28) < 0)
  		return -1;
  #elif defined(IA64)
  	if (upeek(pid, PT_R10, &r10) < 0)
  		return -1;
  	if (upeek(pid, PT_R8, &r8) < 0)
  		return -1;
  	if (ia32 && r8 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
  		if (debug)
  			fprintf(stderr, "stray syscall exit: r8 = %ld\n", r8);
  		return 0;
  	}
  #endif
  #endif /* LINUX */
  	return 1;
  }
  
  static int
  get_error(tcp)
  struct tcb *tcp;
  {
  	int u_error = 0;
  #ifdef LINUX
  #if defined(S390) || defined(S390X)
  		if (gpr2 && (unsigned) -gpr2 < nerrnos) {
  			tcp->u_rval = -1;
  			u_error = -gpr2;
  		}
  		else {
  			tcp->u_rval = gpr2;
  			u_error = 0;
  		}
  #else /* !S390 && !S390X */
  #ifdef I386
  		if (eax < 0 && -eax < nerrnos) {
  			tcp->u_rval = -1;
  			u_error = -eax;
  		}
  		else {
  			tcp->u_rval = eax;
  			u_error = 0;
  		}
  #else /* !I386 */
  #ifdef X86_64
  		if (rax < 0 && -rax < nerrnos) {
  			tcp->u_rval = -1;
  			u_error = -rax;
  		}
  		else {
  			tcp->u_rval = rax;
  			u_error = 0;
  		}
  #else
  #ifdef IA64
  		if (ia32) {
  			int err;
  
  			err = (int)r8;
  			if (err < 0 && -err < nerrnos) {
  				tcp->u_rval = -1;
  				u_error = -err;
  			}
  			else {
  				tcp->u_rval = err;
  				u_error = 0;
  			}
  		} else {
  			if (r10) {
  				tcp->u_rval = -1;
  				u_error = r8;
  			} else {
  				tcp->u_rval = r8;
  				u_error = 0;
  			}
  		}
  #else /* !IA64 */
  #ifdef MIPS
  		if (a3) {
  		  	tcp->u_rval = -1;
  			u_error = r2;
  		} else {
  		  	tcp->u_rval = r2;
  			u_error = 0;
  		}
  #else
  #ifdef POWERPC
  		if (result && (unsigned long) -result < nerrnos) {
  			tcp->u_rval = -1;
  			u_error = -result;
  		}
  		else {
  			tcp->u_rval = result;
  			u_error = 0;
  		}
  #else /* !POWERPC */
  #ifdef M68K
  		if (d0 && (unsigned) -d0 < nerrnos) {
  			tcp->u_rval = -1;
  			u_error = -d0;
  		}
  		else {
  			tcp->u_rval = d0;
  			u_error = 0;
  		}
  #else /* !M68K */
  #ifdef ARM
  		if (regs.ARM_r0 && (unsigned) -regs.ARM_r0 < nerrnos) {
  			tcp->u_rval = -1;
  			u_error = -regs.ARM_r0;
  		}
  		else {
  			tcp->u_rval = regs.ARM_r0;
  			u_error = 0;
  		}
  #else /* !ARM */
  #ifdef ALPHA
  		if (a3) {
  			tcp->u_rval = -1;
  			u_error = r0;
  		}
  		else {
  			tcp->u_rval = r0;
  			u_error = 0;
  		}
  #else /* !ALPHA */
  #ifdef SPARC
  		if (regs.r_psr & PSR_C) {
  			tcp->u_rval = -1;
  			u_error = regs.r_o0;
  		}
  		else {
  			tcp->u_rval = regs.r_o0;
  			u_error = 0;
  		}
  #else /* !SPARC */
  #ifdef SPARC64
  		if (regs.r_tstate & 0x1100000000UL) {
  			tcp->u_rval = -1;
  			u_error = regs.r_o0;
  		}
  		else {
  			tcp->u_rval = regs.r_o0;
  			u_error = 0;
  		}
  #else /* !SPARC64 */
  #ifdef HPPA
  		if (r28 && (unsigned) -r28 < nerrnos) {
  			tcp->u_rval = -1;
  			u_error = -r28;
  		}
  		else {
  			tcp->u_rval = r28;
  			u_error = 0;
  		}
  #else
  #ifdef SH
                 /* interpret R0 as return value or error number */
                 if (r0 && (unsigned) -r0 < nerrnos) {
                         tcp->u_rval = -1;
                         u_error = -r0;
                 }
                 else {
                         tcp->u_rval = r0;
                         u_error = 0;
                 }
  #else
  #ifdef SH64
                  /* interpret result as return value or error number */
                  if (r9 && (unsigned) -r9 < nerrnos) {
  	                tcp->u_rval = -1;
  	                u_error = -r9;
                  }
                  else {
                          tcp->u_rval = r9;
  	                u_error = 0;
                  }
  #endif /* SH64 */
  #endif /* SH */
  #endif /* HPPA */
  #endif /* SPARC */
  #endif /* SPARC64 */
  #endif /* ALPHA */
  #endif /* ARM */
  #endif /* M68K */
  #endif /* POWERPC */
  #endif /* MIPS */
  #endif /* IA64 */
  #endif /* X86_64 */
  #endif /* I386 */
  #endif /* S390 || S390X */
  #endif /* LINUX */
  #ifdef SUNOS4
  		/* get error code from user struct */
  		if (upeek(pid, uoff(u_error), &u_error) < 0)
  			return -1;
  		u_error >>= 24; /* u_error is a char */
  
  		/* get system call return value */
  		if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
  			return -1;
  #endif /* SUNOS4 */
  #ifdef SVR4
  #ifdef SPARC
  		/* Judicious guessing goes a long way. */
  		if (tcp->status.pr_reg[R_PSR] & 0x100000) {
  			tcp->u_rval = -1;
  			u_error = tcp->status.pr_reg[R_O0];
  		}
  		else {
  			tcp->u_rval = tcp->status.pr_reg[R_O0];
  			u_error = 0;
  		}
  #endif /* SPARC */
  #ifdef I386
  		/* Wanna know how to kill an hour single-stepping? */
  		if (tcp->status.PR_REG[EFL] & 0x1) {
  			tcp->u_rval = -1;
  			u_error = tcp->status.PR_REG[EAX];
  		}
  		else {
  			tcp->u_rval = tcp->status.PR_REG[EAX];
  #ifdef HAVE_LONG_LONG
  			tcp->u_lrval =
  				((unsigned long long) tcp->status.PR_REG[EDX] << 32) +
  				tcp->status.PR_REG[EAX];
  #endif
  			u_error = 0;
  		}
  #endif /* I386 */
  #ifdef X86_64
  		/* Wanna know how to kill an hour single-stepping? */
  		if (tcp->status.PR_REG[EFLAGS] & 0x1) {
  			tcp->u_rval = -1;
  			u_error = tcp->status.PR_REG[RAX];
  		}
  		else {
  			tcp->u_rval = tcp->status.PR_REG[RAX];
  			u_error = 0;
  		}
  #endif /* X86_64 */
  #ifdef MIPS
  		if (tcp->status.pr_reg[CTX_A3]) {
  			tcp->u_rval = -1;
  			u_error = tcp->status.pr_reg[CTX_V0];
  		}
  		else {
  			tcp->u_rval = tcp->status.pr_reg[CTX_V0];
  			u_error = 0;
  		}
  #endif /* MIPS */
  #endif /* SVR4 */
  #ifdef FREEBSD
  		if (regs.r_eflags & PSL_C) {
   		        tcp->u_rval = -1;
  		        u_error = regs.r_eax;
  		} else {
  		        tcp->u_rval = regs.r_eax;
  			tcp->u_lrval =
  			  ((unsigned long long) regs.r_edx << 32) +  regs.r_eax;
  		        u_error = 0;
  		}
  #endif /* FREEBSD */
  	tcp->u_error = u_error;
  	return 1;
  }
  
  int
  force_result(tcp, error, rval)
  	struct tcb *tcp;
  	int error;
  	long rval;
  {
  #ifdef LINUX
  #if defined(S390) || defined(S390X)
  	gpr2 = error ? -error : rval;
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)PT_GPR2, gpr2) < 0)
  		return -1;
  #else /* !S390 && !S390X */
  #ifdef I386
  	eax = error ? -error : rval;
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(EAX * 4), eax) < 0)
  		return -1;
  #else /* !I386 */
  #ifdef X86_64
  	rax = error ? -error : rval;
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(RAX * 8), rax) < 0)
  		return -1;
  #else
  #ifdef IA64
  	if (ia32) {
  		r8 = error ? -error : rval;
  		if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R8), r8) < 0)
  			return -1;
  	}
  	else {
  		if (error) {
  			r8 = error;
  			r10 = -1;
  		}
  		else {
  			r8 = rval;
  			r10 = 0;
  		}
  		if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R8), r8) < 0 ||
  		    ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R10), r10) < 0)
  			return -1;
  	}
  #else /* !IA64 */
  #ifdef MIPS
  	if (error) {
  		r2 = error;
  		a3 = -1;
  	}
  	else {
  		r2 = rval;
  		a3 = 0;
  	}
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), a3) < 0 ||
  	    ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), r2) < 0)
  	    	return -1;
  #else
  #ifdef POWERPC
  	if (upeek(tcp->pid, sizeof(unsigned long)*PT_CCR, &flags) < 0)
  		return -1;
  	if (error) {
  		flags |= SO_MASK;
  		result = error;
  	}
  	else {
  		flags &= ~SO_MASK;
  		result = rval;
  	}
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(sizeof(unsigned long)*PT_CCR), flags) < 0 ||
  	    ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(sizeof(unsigned long)*PT_R3), result) < 0)
  		return -1;
  #else /* !POWERPC */
  #ifdef M68K
  	d0 = error ? -error : rval;
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_D0), d0) < 0)
  		return -1;
  #else /* !M68K */
  #ifdef ARM
         regs.ARM_r0 = error ? -error : rval;
         if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*0), regs.ARM_r0) < 0)
  		return -1;
  #else /* !ARM */
  #ifdef ALPHA
  	if (error) {
  		a3 = -1;
  		r0 = error;
  	}
  	else {
  		a3 = 0;
  		r0 = rval;
  	}
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), a3) < 0 ||
  	    ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_R0), r0) < 0)
  		return -1;
  #else /* !ALPHA */
  #ifdef SPARC
  	if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)&regs, 0) < 0)
  		return -1;
  	if (error) {
  		regs.r_psr |= PSR_C;
  		regs.r_o0 = error;
  	}
  	else {
  		regs.r_psr &= ~PSR_C;
  		regs.r_o0 = rval;
  	}
  	if (ptrace(PTRACE_SETREGS, tcp->pid, (char *)&regs, 0) < 0)
  		return -1;
  #else /* !SPARC */
  #ifdef SPARC64
  	if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)&regs, 0) < 0)
  		return -1;
  	if (error) {
  		regs.r_tstate |= 0x1100000000UL;
  		regs.r_o0 = error;
  	}
  	else {
  		regs.r_tstate &= ~0x1100000000UL;
  		regs.r_o0 = rval;
  	}
  	if (ptrace(PTRACE_SETREGS, tcp->pid, (char *)&regs, 0) < 0)
  		return -1;
  #else /* !SPARC64 */
  #ifdef HPPA
  	r28 = error ? -error : rval;
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR28), r28) < 0)
  		return -1;
  #else
  #ifdef SH
  	r0 = error ? -error : rval;
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*REG_REG0), r0) < 0)
  		return -1;
  #else
  #ifdef SH64
          r9 = error ? -error : rval;
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)REG_GENERAL(9), r9) < 0)
  		return -1;
  #endif /* SH64 */
  #endif /* SH */
  #endif /* HPPA */
  #endif /* SPARC */
  #endif /* SPARC64 */
  #endif /* ALPHA */
  #endif /* ARM */
  #endif /* M68K */
  #endif /* POWERPC */
  #endif /* MIPS */
  #endif /* IA64 */
  #endif /* X86_64 */
  #endif /* I386 */
  #endif /* S390 || S390X */
  #endif /* LINUX */
  #ifdef SUNOS4
  	if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)uoff(u_error),
  		   error << 24) < 0 ||
  	    ptrace(PTRACE_POKEUSER, tcp->pid, (char*)uoff(u_rval1), rval) < 0)
  		return -1;
  #endif /* SUNOS4 */
  #ifdef SVR4
  	/* XXX no clue */
  	return -1;
  #endif /* SVR4 */
  #ifdef FREEBSD
  	if (pread(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
  	        perror("pread");
                  return -1;
          }
  	if (error) {
  		regs.r_eflags |= PSL_C;
  		regs.r_eax = error;
  	}
  	else {
  		regs.r_eflags &= ~PSL_C;
  		regs.r_eax = rval;
  	}
  	if (pwrite(tcp->pfd_reg, &regs, sizeof(regs), 0) < 0) {
  	        perror("pwrite");
                  return -1;
          }
  #endif /* FREEBSD */
  
  	/* All branches reach here on success (only).  */
  	tcp->u_error = error;
  	tcp->u_rval = rval;
  	return 0;
  }
  
  static int
  syscall_enter(tcp)
  struct tcb *tcp;
  {
  #ifndef USE_PROCFS
  	int pid = tcp->pid;
  #endif /* !USE_PROCFS */
  #ifdef LINUX
  #if defined(S390) || defined(S390X)
  	{
  		int i;
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++) {
  			if (upeek(pid,i==0 ? PT_ORIGGPR2:PT_GPR2+i*sizeof(long), &tcp->u_arg[i]) < 0)
  				return -1;
  		}
  	}
  #elif defined (ALPHA)
  	{
  		int i;
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++) {
  			/* WTA: if scno is out-of-bounds this will bomb. Add range-check
  			 * for scno somewhere above here!
  			 */
  			if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
  				return -1;
  		}
  	}
  #elif defined (IA64)
  	{
  		if (!ia32) {
  			unsigned long *out0, *rbs_end, cfm, sof, sol, i;
  			/* be backwards compatible with kernel < 2.4.4... */
  #			ifndef PT_RBS_END
  #			  define PT_RBS_END	PT_AR_BSP
  #			endif
  
  			if (upeek(pid, PT_RBS_END, (long *) &rbs_end) < 0)
  				return -1;
  			if (upeek(pid, PT_CFM, (long *) &cfm) < 0)
  				return -1;
  
  			sof = (cfm >> 0) & 0x7f;
  			sol = (cfm >> 7) & 0x7f;
  			out0 = ia64_rse_skip_regs(rbs_end, -sof + sol);
  
  			if (tcp->scno >= 0 && tcp->scno < nsyscalls
  			    && sysent[tcp->scno].nargs != -1)
  				tcp->u_nargs = sysent[tcp->scno].nargs;
  			else
  				tcp->u_nargs = MAX_ARGS;
  			for (i = 0; i < tcp->u_nargs; ++i) {
  				if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(out0, i),
  					   sizeof(long), (char *) &tcp->u_arg[i]) < 0)
  					return -1;
  			}
  		} else {
  			int i;
  
  			if (/* EBX = out0 */
  			    upeek(pid, PT_R11, (long *) &tcp->u_arg[0]) < 0
  			    /* ECX = out1 */
  			    || upeek(pid, PT_R9,  (long *) &tcp->u_arg[1]) < 0
  			    /* EDX = out2 */
  			    || upeek(pid, PT_R10, (long *) &tcp->u_arg[2]) < 0
  			    /* ESI = out3 */
  			    || upeek(pid, PT_R14, (long *) &tcp->u_arg[3]) < 0
  			    /* EDI = out4 */
  			    || upeek(pid, PT_R15, (long *) &tcp->u_arg[4]) < 0
  			    /* EBP = out5 */
  			    || upeek(pid, PT_R13, (long *) &tcp->u_arg[5]) < 0)
  				return -1;
  
  			for (i = 0; i < 6; ++i)
  				/* truncate away IVE sign-extension */
  				tcp->u_arg[i] &= 0xffffffff;
  
  			if (tcp->scno >= 0 && tcp->scno < nsyscalls
  			    && sysent[tcp->scno].nargs != -1)
  				tcp->u_nargs = sysent[tcp->scno].nargs;
  			else
  				tcp->u_nargs = 5;
  		}
  	}
  #elif defined (MIPS)
  	{
  	  	long sp;
  	  	int i, nargs;
  
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			nargs = tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	nargs = tcp->u_nargs = MAX_ARGS;
  		if(nargs > 4) {
  		  	if(upeek(pid, REG_SP, &sp) < 0)
  			  	return -1;
  			for(i = 0; i < 4; i++) {
  			  	if (upeek(pid, REG_A0 + i, &tcp->u_arg[i])<0)
  				  	return -1;
  			}
  			umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]),
  			       (char *)(tcp->u_arg + 4));
  		} else {
  		  	for(i = 0; i < nargs; i++) {
  			  	if (upeek(pid, REG_A0 + i, &tcp->u_arg[i]) < 0)
  				  	return -1;
  			}
  		}
  	}
  #elif defined (POWERPC)
  #ifndef PT_ORIG_R3
  #define PT_ORIG_R3 34
  #endif
  	{
  		int i;
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++) {
  			if (upeek(pid, (i==0) ?
  				(sizeof(unsigned long)*PT_ORIG_R3) :
  				((i+PT_R3)*sizeof(unsigned long)),
  					&tcp->u_arg[i]) < 0)
  				return -1;
  		}
  	}
  #elif defined (SPARC) || defined (SPARC64)
  	{
  		int i;
  
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++)
  			tcp->u_arg[i] = *((&regs.r_o0) + i);
  	}
  #elif defined (HPPA)
  	{
  		int i;
  
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++) {
  			if (upeek(pid, PT_GR26-4*i, &tcp->u_arg[i]) < 0)
  				return -1;
  		}
  	}
  #elif defined(ARM)
  	{
  		int i;
  
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
  			tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++)
  			tcp->u_arg[i] = regs.uregs[i];
   	}
  #elif defined(SH)
         {
                 int i;
                 static int syscall_regs[] = {
                     REG_REG0+4, REG_REG0+5, REG_REG0+6, REG_REG0+7,
                     REG_REG0, REG_REG0+1, REG_REG0+2
                     };
  
                 tcp->u_nargs = sysent[tcp->scno].nargs;
                 for (i = 0; i < tcp->u_nargs; i++) {
                         if (upeek(pid, 4*syscall_regs[i], &tcp->u_arg[i]) < 0)
                                 return -1;
                 }
          }
  #elif defined(SH64)
  	{
  		int i;
                  /* Registers used by SH5 Linux system calls for parameters */
  		static int syscall_regs[] = { 2, 3, 4, 5, 6, 7 };
  
  		/*
  		 * TODO: should also check that the number of arguments encoded
  		 *       in the trap number matches the number strace expects.
  		 */
  		/*
  		    assert(sysent[tcp->scno].nargs <
  		    	sizeof(syscall_regs)/sizeof(syscall_regs[0]));
  		 */
  
  		tcp->u_nargs = sysent[tcp->scno].nargs;
  		for (i = 0; i < tcp->u_nargs; i++) {
  			if (upeek(pid, REG_GENERAL(syscall_regs[i]), &tcp->u_arg[i]) < 0)
  				return -1;
  		}
  	}
  
  #elif defined(X86_64)
  	{
  		int i;
  		static int argreg[SUPPORTED_PERSONALITIES][MAX_ARGS] = {
  			{RDI,RSI,RDX,R10,R8,R9},	/* x86-64 ABI */
  			{RBX,RCX,RDX,RSI,RDI,RBP}	/* i386 ABI */
  		};
  
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++) {
  			if (upeek(pid, argreg[current_personality][i]*8, &tcp->u_arg[i]) < 0)
  				return -1;
  		}
  	}
  #else /* Other architecture (like i386) (32bits specific) */
  	{
  		int i;
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++) {
  			if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
  				return -1;
  		}
  	}
  #endif
  #endif /* LINUX */
  #ifdef SUNOS4
  	{
  		int i;
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  			tcp->u_nargs = sysent[tcp->scno].nargs;
  		else
       	        	tcp->u_nargs = MAX_ARGS;
  		for (i = 0; i < tcp->u_nargs; i++) {
  			struct user *u;
  
  			if (upeek(pid, uoff(u_arg[0]) +
  			    (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
  				return -1;
  		}
  	}
  #endif /* SUNOS4 */
  #ifdef SVR4
  #ifdef MIPS
  	/*
  	 * SGI is broken: even though it has pr_sysarg, it doesn't
  	 * set them on system call entry.  Get a clue.
  	 */
  	if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  		tcp->u_nargs = sysent[tcp->scno].nargs;
  	else
  		tcp->u_nargs = tcp->status.pr_nsysarg;
  	if (tcp->u_nargs > 4) {
  		memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
  			4*sizeof(tcp->u_arg[0]));
  		umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
  			(tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
  	}
  	else {
  		memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
  			tcp->u_nargs*sizeof(tcp->u_arg[0]));
  	}
  #elif UNIXWARE >= 2
  	/*
  	 * Like SGI, UnixWare doesn't set pr_sysarg until system call exit
  	 */
  	if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  		tcp->u_nargs = sysent[tcp->scno].nargs;
  	else
  		tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg;
  	umoven(tcp, tcp->status.PR_REG[UESP] + 4,
  		tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
  #elif defined (HAVE_PR_SYSCALL)
  	if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  		tcp->u_nargs = sysent[tcp->scno].nargs;
  	else
  		tcp->u_nargs = tcp->status.pr_nsysarg;
  	{
  		int i;
  		for (i = 0; i < tcp->u_nargs; i++)
  			tcp->u_arg[i] = tcp->status.pr_sysarg[i];
  	}
  #elif defined (I386)
  	if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
  		tcp->u_nargs = sysent[tcp->scno].nargs;
  	else
  		tcp->u_nargs = 5;
  	umoven(tcp, tcp->status.PR_REG[UESP] + 4,
  		tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
  #else
  	I DONT KNOW WHAT TO DO
  #endif /* !HAVE_PR_SYSCALL */
  #endif /* SVR4 */
  #ifdef FREEBSD
  	if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
  	    sysent[tcp->scno].nargs > tcp->status.val)
  		tcp->u_nargs = sysent[tcp->scno].nargs;
  	else
  	  	tcp->u_nargs = tcp->status.val;
  	if (tcp->u_nargs < 0)
  		tcp->u_nargs = 0;
  	if (tcp->u_nargs > MAX_ARGS)
  		tcp->u_nargs = MAX_ARGS;
  	switch(regs.r_eax) {
  	case SYS___syscall:
  		pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
  		      regs.r_esp + sizeof(int) + sizeof(quad_t));
  	  break;
          case SYS_syscall:
  		pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
  		      regs.r_esp + 2 * sizeof(int));
  	  break;
          default:
  		pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
  		      regs.r_esp + sizeof(int));
  	  break;
  	}
  #endif /* FREEBSD */
  	return 1;
  }
  
  int
  trace_syscall(tcp)
  struct tcb *tcp;
  {
  	int sys_res;
  	struct timeval tv;
  	int res;
  
  	/* Measure the exit time as early as possible to avoid errors. */
  	if (dtime && (tcp->flags & TCB_INSYSCALL))
  		gettimeofday(&tv, NULL);
  
  	res = get_scno(tcp);
  	if (res != 1)
  		return res;
  
  	res = syscall_fixup(tcp);
  	if (res != 1)
  		return res;
  
  	if (tcp->flags & TCB_INSYSCALL) {
  		long u_error;
  		res = get_error(tcp);
  		if (res != 1)
  			return res;
  
  		internal_syscall(tcp);
  		if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
  		    !(qual_flags[tcp->scno] & QUAL_TRACE)) {
  			tcp->flags &= ~TCB_INSYSCALL;
  			return 0;
  		}
  
  		if (tcp->flags & TCB_REPRINT) {
  			printleader(tcp);
  			tprintf("<... ");
  			if (tcp->scno >= nsyscalls || tcp->scno < 0)
  				tprintf("syscall_%lu", tcp->scno);
  			else
  				tprintf("%s", sysent[tcp->scno].sys_name);
  			tprintf(" resumed> ");
  		}
  
  		if (cflag && tcp->scno < nsyscalls && tcp->scno >= 0) {
  			if (counts == NULL) {
  				counts = calloc(sizeof *counts, nsyscalls);
  				if (counts == NULL) {
  					fprintf(stderr, "\
  strace: out of memory for call counts\n");
  					exit(1);
  				}
  			}
  
  			counts[tcp->scno].calls++;
  			if (tcp->u_error)
  				counts[tcp->scno].errors++;
  			tv_sub(&tv, &tv, &tcp->etime);
  #ifndef HAVE_ANDROID_OS
  #ifdef LINUX
  			if (tv_cmp(&tv, &tcp->dtime) > 0) {
  				static struct timeval one_tick;
  				if (one_tick.tv_usec == 0) {
  					/* Initialize it.  */
  					struct itimerval it;
  					memset(&it, 0, sizeof it);
  					it.it_interval.tv_usec = 1;
  					setitimer(ITIMER_REAL, &it, NULL);
  					getitimer(ITIMER_REAL, &it);
  					one_tick = it.it_interval;
  				}
  
  				if (tv_nz(&tcp->dtime))
  					tv = tcp->dtime;
  				else if (tv_cmp(&tv, &one_tick) > 0) {
  					if (tv_cmp(&shortest, &one_tick) < 0)
  						tv = shortest;
  					else
  						tv = one_tick;
  				}
  			}
  #endif /* LINUX */
  #endif
  			if (tv_cmp(&tv, &shortest) < 0)
  				shortest = tv;
  			tv_add(&counts[tcp->scno].time,
  				&counts[tcp->scno].time, &tv);
  			tcp->flags &= ~TCB_INSYSCALL;
  			return 0;
  		}
  
  		if (tcp->scno >= nsyscalls || tcp->scno < 0
  		    || (qual_flags[tcp->scno] & QUAL_RAW))
  			sys_res = printargs(tcp);
  		else {
  			if (not_failing_only && tcp->u_error)
  				return 0;	/* ignore failed syscalls */
  			sys_res = (*sysent[tcp->scno].sys_func)(tcp);
  		}
  		u_error = tcp->u_error;
  		tprintf(") ");
  		tabto(acolumn);
  		if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
  		    qual_flags[tcp->scno] & QUAL_RAW) {
  			if (u_error)
  				tprintf("= -1 (errno %ld)", u_error);
  			else
  				tprintf("= %#lx", tcp->u_rval);
  		}
  		else if (!(sys_res & RVAL_NONE) && u_error) {
  			switch (u_error) {
  #ifdef LINUX
  			case ERESTARTSYS:
  				tprintf("= ? ERESTARTSYS (To be restarted)");
  				break;
  			case ERESTARTNOINTR:
  				tprintf("= ? ERESTARTNOINTR (To be restarted)");
  				break;
  			case ERESTARTNOHAND:
  				tprintf("= ? ERESTARTNOHAND (To be restarted)");
  				break;
  			case ERESTART_RESTARTBLOCK:
  				tprintf("= ? ERESTART_RESTARTBLOCK (To be restarted)");
  				break;
  #endif /* LINUX */
  			default:
  				tprintf("= -1 ");
  				if (u_error < 0)
  					tprintf("E??? (errno %ld)", u_error);
  				else if (u_error < nerrnos)
  					tprintf("%s (%s)", errnoent[u_error],
  						strerror(u_error));
  				else
  					tprintf("ERRNO_%ld (%s)", u_error,
  						strerror(u_error));
  				break;
  			}
  		}
  		else {
  			if (sys_res & RVAL_NONE)
  				tprintf("= ?");
  			else {
  				switch (sys_res & RVAL_MASK) {
  				case RVAL_HEX:
  					tprintf("= %#lx", tcp->u_rval);
  					break;
  				case RVAL_OCTAL:
  					tprintf("= %#lo", tcp->u_rval);
  					break;
  				case RVAL_UDECIMAL:
  					tprintf("= %lu", tcp->u_rval);
  					break;
  				case RVAL_DECIMAL:
  					tprintf("= %ld", tcp->u_rval);
  					break;
  #ifdef HAVE_LONG_LONG
  				case RVAL_LHEX:
  					tprintf("= %#llx", tcp->u_lrval);
  					break;
  				case RVAL_LOCTAL:
  					tprintf("= %#llo", tcp->u_lrval);
  					break;
  				case RVAL_LUDECIMAL:
  					tprintf("= %llu", tcp->u_lrval);
  					break;
  				case RVAL_LDECIMAL:
  					tprintf("= %lld", tcp->u_lrval);
  					break;
  #endif
  				default:
  					fprintf(stderr,
  						"invalid rval format\n");
  					break;
  				}
  			}
  			if ((sys_res & RVAL_STR) && tcp->auxstr)
  				tprintf(" (%s)", tcp->auxstr);
  		}
  		if (dtime) {
  			tv_sub(&tv, &tv, &tcp->etime);
  			tprintf(" <%ld.%06ld>",
  				(long) tv.tv_sec, (long) tv.tv_usec);
  		}
  		printtrailer(tcp);
  
  		dumpio(tcp);
  		if (fflush(tcp->outf) == EOF)
  			return -1;
  		tcp->flags &= ~TCB_INSYSCALL;
  		return 0;
  	}
  
  	/* Entering system call */
  	res = syscall_enter(tcp);
  	if (res != 1)
  		return res;
  
  	switch (known_scno(tcp)) {
  #ifdef LINUX
  #if !defined (ALPHA) && !defined(SPARC) && !defined(SPARC64) && !defined(MIPS) && !defined(HPPA) && !defined(__ARM_EABI__) //ANDROID
  	case SYS_socketcall:
  		decode_subcall(tcp, SYS_socket_subcall,
  			SYS_socket_nsubcalls, deref_style);
  		break;
  	case SYS_ipc:
  		decode_subcall(tcp, SYS_ipc_subcall,
  			SYS_ipc_nsubcalls, shift_style);
  		break;
  #endif /* !ALPHA && !MIPS && !SPARC && !SPARC64 && !HPPA */
  #if defined (SPARC) || defined (SPARC64)
  	case SYS_socketcall:
  		sparc_socket_decode (tcp);
  		break;
  #endif
  #endif /* LINUX */
  #ifdef SVR4
  #ifdef SYS_pgrpsys_subcall
  	case SYS_pgrpsys:
  		decode_subcall(tcp, SYS_pgrpsys_subcall,
  			SYS_pgrpsys_nsubcalls, shift_style);
  		break;
  #endif /* SYS_pgrpsys_subcall */
  #ifdef SYS_sigcall_subcall
  	case SYS_sigcall:
  		decode_subcall(tcp, SYS_sigcall_subcall,
  			SYS_sigcall_nsubcalls, mask_style);
  		break;
  #endif /* SYS_sigcall_subcall */
  	case SYS_msgsys:
  		decode_subcall(tcp, SYS_msgsys_subcall,
  			SYS_msgsys_nsubcalls, shift_style);
  		break;
  	case SYS_shmsys:
  		decode_subcall(tcp, SYS_shmsys_subcall,
  			SYS_shmsys_nsubcalls, shift_style);
  		break;
  	case SYS_semsys:
  		decode_subcall(tcp, SYS_semsys_subcall,
  			SYS_semsys_nsubcalls, shift_style);
  		break;
  #if 0 /* broken */
  	case SYS_utssys:
  		decode_subcall(tcp, SYS_utssys_subcall,
  			SYS_utssys_nsubcalls, shift_style);
  		break;
  #endif
  	case SYS_sysfs:
  		decode_subcall(tcp, SYS_sysfs_subcall,
  			SYS_sysfs_nsubcalls, shift_style);
  		break;
  	case SYS_spcall:
  		decode_subcall(tcp, SYS_spcall_subcall,
  			SYS_spcall_nsubcalls, shift_style);
  		break;
  #ifdef SYS_context_subcall
  	case SYS_context:
  		decode_subcall(tcp, SYS_context_subcall,
  			SYS_context_nsubcalls, shift_style);
  		break;
  #endif /* SYS_context_subcall */
  #ifdef SYS_door_subcall
  	case SYS_door:
  		decode_subcall(tcp, SYS_door_subcall,
  			SYS_door_nsubcalls, door_style);
  		break;
  #endif /* SYS_door_subcall */
  #ifdef SYS_kaio_subcall
  	case SYS_kaio:
  		decode_subcall(tcp, SYS_kaio_subcall,
  			SYS_kaio_nsubcalls, shift_style);
  		break;
  #endif
  #endif /* SVR4 */
  #ifdef FREEBSD
  	case SYS_msgsys:
  	case SYS_shmsys:
  	case SYS_semsys:
  		decode_subcall(tcp, 0, 0, table_style);
  		break;
  #endif
  #ifdef SUNOS4
  	case SYS_semsys:
  		decode_subcall(tcp, SYS_semsys_subcall,
  			SYS_semsys_nsubcalls, shift_style);
  		break;
  	case SYS_msgsys:
  		decode_subcall(tcp, SYS_msgsys_subcall,
  			SYS_msgsys_nsubcalls, shift_style);
  		break;
  	case SYS_shmsys:
  		decode_subcall(tcp, SYS_shmsys_subcall,
  			SYS_shmsys_nsubcalls, shift_style);
  		break;
  #endif
  	}
  
  	internal_syscall(tcp);
  	if (tcp->scno >=0 && tcp->scno < nsyscalls && !(qual_flags[tcp->scno] & QUAL_TRACE)) {
  		tcp->flags |= TCB_INSYSCALL;
  		return 0;
  	}
  
  	if (cflag) {
  		gettimeofday(&tcp->etime, NULL);
  		tcp->flags |= TCB_INSYSCALL;
  		return 0;
  	}
  
  	printleader(tcp);
  	tcp->flags &= ~TCB_REPRINT;
  	tcp_last = tcp;
  	if (tcp->scno >= nsyscalls || tcp->scno < 0)
  		tprintf("syscall_%lu(", tcp->scno);
  	else
  		tprintf("%s(", sysent[tcp->scno].sys_name);
  	if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
  	    ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
  		sys_res = printargs(tcp);
  	else
  		sys_res = (*sysent[tcp->scno].sys_func)(tcp);
  	if (fflush(tcp->outf) == EOF)
  		return -1;
  	tcp->flags |= TCB_INSYSCALL;
  	/* Measure the entrance time as late as possible to avoid errors. */
  	if (dtime)
  		gettimeofday(&tcp->etime, NULL);
  	return sys_res;
  }
  
  int
  printargs(tcp)
  struct tcb *tcp;
  {
  	if (entering(tcp)) {
  		int i;
  
  		for (i = 0; i < tcp->u_nargs; i++)
  			tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
  	}
  	return 0;
  }
  
  long
  getrval2(tcp)
  struct tcb *tcp;
  {
  	long val = -1;
  
  #ifdef LINUX
  #if defined (SPARC) || defined (SPARC64)
  	struct regs regs;
  	if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)&regs,0) < 0)
  		return -1;
  	val = regs.r_o1;
  #elif defined(SH)
  	if (upeek(tcp->pid, 4*(REG_REG0+1), &val) < 0)
  		return -1;
  #elif defined(IA64)
  	if (upeek(tcp->pid, PT_R9, &val) < 0)
  		return -1;
  #endif /* SPARC || SPARC64 */
  #endif /* LINUX */
  
  #ifdef SUNOS4
  	if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
  		return -1;
  #endif /* SUNOS4 */
  
  #ifdef SVR4
  #ifdef SPARC
  	val = tcp->status.PR_REG[R_O1];
  #endif /* SPARC */
  #ifdef I386
  	val = tcp->status.PR_REG[EDX];
  #endif /* I386 */
  #ifdef X86_64
  	val = tcp->status.PR_REG[RDX];
  #endif /* X86_64 */
  #ifdef MIPS
  	val = tcp->status.PR_REG[CTX_V1];
  #endif /* MIPS */
  #endif /* SVR4 */
  #ifdef FREEBSD
  	struct reg regs;
  	pread(tcp->pfd_reg, &regs, sizeof(regs), 0);
  	val = regs.r_edx;
  #endif
  	return val;
  }
  
  /*
   * Apparently, indirect system calls have already be converted by ptrace(2),
   * so if you see "indir" this program has gone astray.
   */
  int
  sys_indir(tcp)
  struct tcb *tcp;
  {
  	int i, scno, nargs;
  
  	if (entering(tcp)) {
  		if ((scno = tcp->u_arg[0]) > nsyscalls) {
  			fprintf(stderr, "Bogus syscall: %u\n", scno);
  			return 0;
  		}
  		nargs = sysent[scno].nargs;
  		tprintf("%s", sysent[scno].sys_name);
  		for (i = 0; i < nargs; i++)
  			tprintf(", %#lx", tcp->u_arg[i+1]);
  	}
  	return 0;
  }
  
  static int
  time_cmp(a, b)
  void *a;
  void *b;
  {
  	return -tv_cmp(&counts[*((int *) a)].time, &counts[*((int *) b)].time);
  }
  
  static int
  syscall_cmp(a, b)
  void *a;
  void *b;
  {
  	return strcmp(sysent[*((int *) a)].sys_name,
  		sysent[*((int *) b)].sys_name);
  }
  
  static int
  count_cmp(a, b)
  void *a;
  void *b;
  {
  	int m = counts[*((int *) a)].calls, n = counts[*((int *) b)].calls;
  
  	return (m < n) ? 1 : (m > n) ? -1 : 0;
  }
  
  static int (*sortfun)();
  static struct timeval overhead = { -1, -1 };
  
  void
  set_sortby(sortby)
  char *sortby;
  {
  	if (strcmp(sortby, "time") == 0)
  		sortfun = time_cmp;
  	else if (strcmp(sortby, "calls") == 0)
  		sortfun = count_cmp;
  	else if (strcmp(sortby, "name") == 0)
  		sortfun = syscall_cmp;
  	else if (strcmp(sortby, "nothing") == 0)
  		sortfun = NULL;
  	else {
  		fprintf(stderr, "invalid sortby: `%s'\n", sortby);
  		exit(1);
  	}
  }
  
  void set_overhead(n)
  int n;
  {
  	overhead.tv_sec = n / 1000000;
  	overhead.tv_usec = n % 1000000;
  }
  
  void
  call_summary(outf)
  FILE *outf;
  {
  	int i, j;
  	int call_cum, error_cum;
  	struct timeval tv_cum, dtv;
  	double percent;
  	char *dashes = "-------------------------";
  	char error_str[16];
  
  	int *sorted_count = malloc(nsyscalls * sizeof(int));
  
  	call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
  	if (overhead.tv_sec == -1) {
  		tv_mul(&overhead, &shortest, 8);
  		tv_div(&overhead, &overhead, 10);
  	}
  	for (i = 0; i < nsyscalls; i++) {
  		sorted_count[i] = i;
  		if (counts == NULL || counts[i].calls == 0)
  			continue;
  		tv_mul(&dtv, &overhead, counts[i].calls);
  		tv_sub(&counts[i].time, &counts[i].time, &dtv);
  		call_cum += counts[i].calls;
  		error_cum += counts[i].errors;
  		tv_add(&tv_cum, &tv_cum, &counts[i].time);
  	}
  	if (counts && sortfun)
  		qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
  	fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
  		"% time", "seconds", "usecs/call",
  		"calls", "errors", "syscall");
  	fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
  		dashes, dashes, dashes, dashes, dashes, dashes);
  	if (counts) {
  		for (i = 0; i < nsyscalls; i++) {
  			j = sorted_count[i];
  			if (counts[j].calls == 0)
  				continue;
  			tv_div(&dtv, &counts[j].time, counts[j].calls);
  			if (counts[j].errors)
  				sprintf(error_str, "%d", counts[j].errors);
  			else
  				error_str[0] = '\0';
  			percent = (100.0 * tv_float(&counts[j].time)
  				   / tv_float(&tv_cum));
  			fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
  				percent, (long) counts[j].time.tv_sec,
  				(long) counts[j].time.tv_usec,
  				(long) 1000000 * dtv.tv_sec + dtv.tv_usec,
  				counts[j].calls,
  				error_str, sysent[j].sys_name);
  		}
  	}
  	free(sorted_count);
  
  	fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
  		dashes, dashes, dashes, dashes, dashes, dashes);
  	if (error_cum)
  		sprintf(error_str, "%d", error_cum);
  	else
  		error_str[0] = '\0';
  	fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
  		"100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
  		call_cum, error_str, "total");
  
  }
  