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>
   * 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.
   */
  
  #include "defs.h"
  #include <fcntl.h>
  #if HAVE_SYS_UIO_H
  # include <sys/uio.h>
  #endif
  
  int
  sys_read(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  	} else {
  		if (syserror(tcp))
  			tprintf("%#lx", tcp->u_arg[1]);
  		else
  			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
  		tprintf(", %lu", tcp->u_arg[2]);
  	}
  	return 0;
  }
  
  int
  sys_write(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
  		tprintf(", %lu", tcp->u_arg[2]);
  	}
  	return 0;
  }
  
  #if HAVE_SYS_UIO_H
  /*
   * data_size limits the cumulative size of printed data.
   * Example: recvmsg returing a short read.
   */
  void
  tprint_iov_upto(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov, unsigned long data_size)
  {
  #if SUPPORTED_PERSONALITIES > 1
  	union {
  		struct { u_int32_t base; u_int32_t len; } iov32;
  		struct { u_int64_t base; u_int64_t len; } iov64;
  	} iov;
  #define sizeof_iov \
  	(current_wordsize == 4 ? sizeof(iov.iov32) : sizeof(iov.iov64))
  #define iov_iov_base \
  	(current_wordsize == 4 ? (uint64_t) iov.iov32.base : iov.iov64.base)
  #define iov_iov_len \
  	(current_wordsize == 4 ? (uint64_t) iov.iov32.len : iov.iov64.len)
  #else
  	struct iovec iov;
  #define sizeof_iov sizeof(iov)
  #define iov_iov_base iov.iov_base
  #define iov_iov_len iov.iov_len
  #endif
  	unsigned long size, cur, end, abbrev_end;
  	int failed = 0;
  
  	if (!len) {
  		tprints("[]");
  		return;
  	}
  	size = len * sizeof_iov;
  	end = addr + size;
  	if (!verbose(tcp) || size / sizeof_iov != len || end < addr) {
  		tprintf("%#lx", addr);
  		return;
  	}
  	if (abbrev(tcp)) {
  		abbrev_end = addr + max_strlen * sizeof_iov;
  		if (abbrev_end < addr)
  			abbrev_end = end;
  	} else {
  		abbrev_end = end;
  	}
  	tprints("[");
  	for (cur = addr; cur < end; cur += sizeof_iov) {
  		if (cur > addr)
  			tprints(", ");
  		if (cur >= abbrev_end) {
  			tprints("...");
  			break;
  		}
  		if (umoven(tcp, cur, sizeof_iov, (char *) &iov) < 0) {
  			tprints("?");
  			failed = 1;
  			break;
  		}
  		tprints("{");
  		if (decode_iov) {
  			unsigned long len = iov_iov_len;
  			if (len > data_size)
  				len = data_size;
  			data_size -= len;
  			printstr(tcp, (long) iov_iov_base, len);
  		} else
  			tprintf("%#lx", (long) iov_iov_base);
  		tprintf(", %lu}", (unsigned long)iov_iov_len);
  	}
  	tprints("]");
  	if (failed)
  		tprintf(" %#lx", addr);
  #undef sizeof_iov
  #undef iov_iov_base
  #undef iov_iov_len
  }
  
  void
  tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
  {
  	tprint_iov_upto(tcp, len, addr, decode_iov, (unsigned long) -1L);
  }
  
  int
  sys_readv(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  	} else {
  		if (syserror(tcp)) {
  			tprintf("%#lx, %lu",
  					tcp->u_arg[1], tcp->u_arg[2]);
  			return 0;
  		}
  		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
  		tprintf(", %lu", tcp->u_arg[2]);
  	}
  	return 0;
  }
  
  int
  sys_writev(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
  		tprintf(", %lu", tcp->u_arg[2]);
  	}
  	return 0;
  }
  #endif
  
  /* The SH4 ABI does allow long longs in odd-numbered registers, but
     does not allow them to be split between registers and memory - and
     there are only four argument registers for normal functions.  As a
     result pread takes an extra padding argument before the offset.  This
     was changed late in the 2.4 series (around 2.4.20).  */
  #if defined(SH)
  #define PREAD_OFFSET_ARG 4
  #else
  #define PREAD_OFFSET_ARG 3
  #endif
  
  int
  sys_pread(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  	} else {
  		if (syserror(tcp))
  			tprintf("%#lx", tcp->u_arg[1]);
  		else
  			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
  		tprintf(", %lu, ", tcp->u_arg[2]);
  		printllval(tcp, "%llu", PREAD_OFFSET_ARG);
  	}
  	return 0;
  }
  
  int
  sys_pwrite(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
  		tprintf(", %lu, ", tcp->u_arg[2]);
  		printllval(tcp, "%llu", PREAD_OFFSET_ARG);
  	}
  	return 0;
  }
  
  #if HAVE_SYS_UIO_H
  int
  sys_preadv(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  	} else {
  		if (syserror(tcp)) {
  			tprintf("%#lx, %lu", tcp->u_arg[1], tcp->u_arg[2]);
  			return 0;
  		}
  		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
  		tprintf(", %lu, ", tcp->u_arg[2]);
  		printllval(tcp, "%llu", PREAD_OFFSET_ARG);
  	}
  	return 0;
  }
  
  int
  sys_pwritev(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
  		tprintf(", %lu, ", tcp->u_arg[2]);
  		printllval(tcp, "%llu", PREAD_OFFSET_ARG);
  	}
  	return 0;
  }
  #endif /* HAVE_SYS_UIO_H */
  
  static void
  print_off_t(struct tcb *tcp, long addr)
  {
  	unsigned long offset;
  
  	if (!addr) {
  		tprints("NULL");
  		return;
  	}
  
  #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
  	if (current_wordsize == 4) {
  		uint32_t off;
  
  		if (umove(tcp, addr, &off) < 0)
  			tprintf("%#lx", addr);
  		else
  			tprintf("[%u]", off);
  	} else
  #endif
  	if (umove(tcp, addr, &offset) < 0)
  		tprintf("%#lx", addr);
  	else
  		tprintf("[%lu]", offset);
  }
  
  int
  sys_sendfile(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		printfd(tcp, tcp->u_arg[1]);
  		tprints(", ");
  		print_off_t(tcp, tcp->u_arg[2]);
  		tprintf(", %lu", tcp->u_arg[3]);
  	}
  	return 0;
  }
  
  void
  print_loff_t(struct tcb *tcp, long addr)
  {
  	loff_t offset;
  
  	if (!addr)
  		tprints("NULL");
  	else if (umove(tcp, addr, &offset) < 0)
  		tprintf("%#lx", addr);
  	else
  		tprintf("[%llu]", (unsigned long long int) offset);
  }
  
  int
  sys_sendfile64(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		printfd(tcp, tcp->u_arg[1]);
  		tprints(", ");
  		print_loff_t(tcp, tcp->u_arg[2]);
  		tprintf(", %lu", tcp->u_arg[3]);
  	}
  	return 0;
  }
  
  static const struct xlat splice_flags[] = {
  #ifdef SPLICE_F_MOVE
  	{ SPLICE_F_MOVE,     "SPLICE_F_MOVE"     },
  #endif
  #ifdef SPLICE_F_NONBLOCK
  	{ SPLICE_F_NONBLOCK, "SPLICE_F_NONBLOCK" },
  #endif
  #ifdef SPLICE_F_MORE
  	{ SPLICE_F_MORE,     "SPLICE_F_MORE"     },
  #endif
  #ifdef SPLICE_F_GIFT
  	{ SPLICE_F_GIFT,     "SPLICE_F_GIFT"     },
  #endif
  	{ 0,                 NULL                },
  };
  
  int
  sys_tee(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		/* int fd_in */
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		/* int fd_out */
  		printfd(tcp, tcp->u_arg[1]);
  		tprints(", ");
  		/* size_t len */
  		tprintf("%lu, ", tcp->u_arg[2]);
  		/* unsigned int flags */
  		printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
  	}
  	return 0;
  }
  
  int
  sys_splice(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		/* int fd_in */
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		/* loff_t *off_in */
  		print_loff_t(tcp, tcp->u_arg[1]);
  		tprints(", ");
  		/* int fd_out */
  		printfd(tcp, tcp->u_arg[2]);
  		tprints(", ");
  		/* loff_t *off_out */
  		print_loff_t(tcp, tcp->u_arg[3]);
  		tprints(", ");
  		/* size_t len */
  		tprintf("%lu, ", tcp->u_arg[4]);
  		/* unsigned int flags */
  		printflags(splice_flags, tcp->u_arg[5], "SPLICE_F_???");
  	}
  	return 0;
  }
  
  int
  sys_vmsplice(struct tcb *tcp)
  {
  	if (entering(tcp)) {
  		/* int fd */
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		/* const struct iovec *iov, unsigned long nr_segs */
  		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
  		tprintf(", %lu, ", tcp->u_arg[2]);
  		/* unsigned int flags */
  		printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
  	}
  	return 0;
  }
  
  int
  sys_ioctl(struct tcb *tcp)
  {
  	const struct_ioctlent *iop;
  
  	if (entering(tcp)) {
  		printfd(tcp, tcp->u_arg[0]);
  		tprints(", ");
  		iop = ioctl_lookup(tcp->u_arg[1]);
  		if (iop) {
  			tprints(iop->symbol);
  			while ((iop = ioctl_next_match(iop)))
  				tprintf(" or %s", iop->symbol);
  		} else
  			tprintf("%#lx", tcp->u_arg[1]);
  		ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
  	}
  	else {
  		int ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
  		if (!ret)
  			tprintf(", %#lx", tcp->u_arg[2]);
  		else
  			return ret - 1;
  	}
  	return 0;
  }
  