mem.c - platform/external/strace - Gitiles

 /*
  * 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) 2000 PocketPenguins Inc.  Linux for Hitachi SuperH
  *                    port by Greg Banks <gbanks@pocketpenguins.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.
  */

 #include "defs.h"
 #include <asm/mman.h>
 #include <sys/mman.h>
 #if defined(I386) || defined(X86_64) || defined(X32)
 # include <asm/ldt.h>
 # ifdef HAVE_STRUCT_USER_DESC
 #  define modify_ldt_ldt_s user_desc
 # endif
 #endif /* I386 || X86_64 || X32 */

 static unsigned long
 get_pagesize()
 {
 	static unsigned long pagesize;

 	if (!pagesize)
 		pagesize = sysconf(_SC_PAGESIZE);
 	return pagesize;
 }

 int
 sys_brk(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%#lx", tcp->u_arg[0]);
 	}
 	return RVAL_HEX;
 }

 static const struct xlat mmap_prot[] = {
 	XLAT(PROT_NONE),
 	XLAT(PROT_READ),
 	XLAT(PROT_WRITE),
 	XLAT(PROT_EXEC),
 #ifdef PROT_SEM
 	XLAT(PROT_SEM),
 #endif
 #ifdef PROT_GROWSDOWN
 	XLAT(PROT_GROWSDOWN),
 #endif
 #ifdef PROT_GROWSUP
 	XLAT(PROT_GROWSUP),
 #endif
 #ifdef PROT_SAO
 	XLAT(PROT_SAO),
 #endif
 	XLAT_END
 };

 static const struct xlat mmap_flags[] = {
 	XLAT(MAP_SHARED),
 	XLAT(MAP_PRIVATE),
 	XLAT(MAP_FIXED),
 #ifdef MAP_ANONYMOUS
 	XLAT(MAP_ANONYMOUS),
 #endif
 #ifdef MAP_32BIT
 	XLAT(MAP_32BIT),
 #endif
 #ifdef MAP_RENAME
 	XLAT(MAP_RENAME),
 #endif
 #ifdef MAP_NORESERVE
 	XLAT(MAP_NORESERVE),
 #endif
 #ifdef MAP_POPULATE
 	XLAT(MAP_POPULATE),
 #endif
 #ifdef MAP_NONBLOCK
 	XLAT(MAP_NONBLOCK),
 #endif
 	/*
 	 * XXX - this was introduced in SunOS 4.x to distinguish between
 	 * the old pre-4.x "mmap()", which:
 	 *
 	 *	only let you map devices with an "mmap" routine (e.g.,
 	 *	frame buffers) in;
 	 *
 	 *	required you to specify the mapping address;
 	 *
 	 *	returned 0 on success and -1 on failure;
 	 *
 	 * memory and which, and the 4.x "mmap()" which:
 	 *
 	 *	can map plain files;
 	 *
 	 *	can be asked to pick where to map the file;
 	 *
 	 *	returns the address where it mapped the file on success
 	 *	and -1 on failure.
 	 *
 	 * It's not actually used in source code that calls "mmap()"; the
 	 * "mmap()" routine adds it for you.
 	 *
 	 * It'd be nice to come up with some way of eliminating it from
 	 * the flags, e.g. reporting calls *without* it as "old_mmap()"
 	 * and calls with it as "mmap()".
 	 */
 #ifdef _MAP_NEW
 	XLAT(_MAP_NEW),
 #endif
 #ifdef MAP_GROWSDOWN
 	XLAT(MAP_GROWSDOWN),
 #endif
 #ifdef MAP_DENYWRITE
 	XLAT(MAP_DENYWRITE),
 #endif
 #ifdef MAP_EXECUTABLE
 	XLAT(MAP_EXECUTABLE),
 #endif
 #ifdef MAP_INHERIT
 	XLAT(MAP_INHERIT),
 #endif
 #ifdef MAP_FILE
 	XLAT(MAP_FILE),
 #endif
 #ifdef MAP_LOCKED
 	XLAT(MAP_LOCKED),
 #endif
 	/* FreeBSD ones */
 #if defined(MAP_ANON) && (!defined(MAP_ANONYMOUS) || MAP_ANON != MAP_ANONYMOUS)
 	XLAT(MAP_ANON),
 #endif
 #ifdef MAP_HASSEMAPHORE
 	XLAT(MAP_HASSEMAPHORE),
 #endif
 #ifdef MAP_STACK
 	XLAT(MAP_STACK),
 #endif
 #ifdef MAP_HUGETLB
 	XLAT(MAP_HUGETLB),
 #endif
 #if defined MAP_UNINITIALIZED && MAP_UNINITIALIZED > 0
 	XLAT(MAP_UNINITIALIZED),
 #endif
 #ifdef MAP_NOSYNC
 	XLAT(MAP_NOSYNC),
 #endif
 #ifdef MAP_NOCORE
 	XLAT(MAP_NOCORE),
 #endif
 	XLAT_END
 };

 static int
 print_mmap(struct tcb *tcp, long *u_arg, unsigned long long offset)
 {
 	if (entering(tcp)) {
 		/* addr */
 		if (!u_arg[0])
 			tprints("NULL, ");
 		else
 			tprintf("%#lx, ", u_arg[0]);
 		/* len */
 		tprintf("%lu, ", u_arg[1]);
 		/* prot */
 		printflags(mmap_prot, u_arg[2], "PROT_???");
 		tprints(", ");
 		/* flags */
 #ifdef MAP_TYPE
 		printxval(mmap_flags, u_arg[3] & MAP_TYPE, "MAP_???");
 		addflags(mmap_flags, u_arg[3] & ~MAP_TYPE);
 #else
 		printflags(mmap_flags, u_arg[3], "MAP_???");
 #endif
 		tprints(", ");
 		/* fd */
 		printfd(tcp, u_arg[4]);
 		/* offset */
 		tprintf(", %#llx", offset);
 	}
 	return RVAL_HEX;
 }

 /* Syscall name<->function correspondence is messed up on many arches.
  * For example:
  * i386 has __NR_mmap == 90, and it is "old mmap", and
  * also it has __NR_mmap2 == 192, which is a "new mmap with page offsets".
  * But x86_64 has just one __NR_mmap == 9, a "new mmap with byte offsets".
  * Confused? Me too!
  */

 /* Params are pointed to by u_arg[0], offset is in bytes */
 int
 sys_old_mmap(struct tcb *tcp)
 {
 	long u_arg[6];
 #if defined(IA64)
 	/*
 	 * IA64 processes never call this routine, they only use the
 	 * new 'sys_mmap' interface. Only IA32 processes come here.
 	 */
 	int i;
 	unsigned narrow_arg[6];
 	if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
 		return 0;
 	for (i = 0; i < 6; i++)
 		u_arg[i] = (unsigned long) narrow_arg[i];
 #elif defined(X86_64)
 	/* We are here only in personality 1 (i386) */
 	int i;
 	unsigned narrow_arg[6];
 	if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
 		return 0;
 	for (i = 0; i < 6; ++i)
 		u_arg[i] = (unsigned long) narrow_arg[i];
 #else
 	if (umoven(tcp, tcp->u_arg[0], sizeof(u_arg), (char *) u_arg) == -1)
 		return 0;
 #endif
 	return print_mmap(tcp, u_arg, (unsigned long) u_arg[5]);
 }

 #if defined(S390)
 /* Params are pointed to by u_arg[0], offset is in pages */
 int
 sys_old_mmap_pgoff(struct tcb *tcp)
 {
 	long u_arg[5];
 	int i;
 	unsigned narrow_arg[6];
 	unsigned long long offset;
 	if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
 		return 0;
 	for (i = 0; i < 5; i++)
 		u_arg[i] = (unsigned long) narrow_arg[i];
 	offset = narrow_arg[5];
 	offset *= get_pagesize();
 	return print_mmap(tcp, u_arg, offset);
 }
 #endif

 /* Params are passed directly, offset is in bytes */
 int
 sys_mmap(struct tcb *tcp)
 {
 	unsigned long long offset = (unsigned long) tcp->u_arg[5];
 #if defined(LINUX_MIPSN32) || defined(X32)
 	/* Try test/x32_mmap.c */
 	offset = tcp->ext_arg[5];
 #endif
 	/* Example of kernel-side handling of this variety of mmap:
 	 * arch/x86/kernel/sys_x86_64.c::SYSCALL_DEFINE6(mmap, ...) calls
 	 * sys_mmap_pgoff(..., off >> PAGE_SHIFT); i.e. off is in bytes,
 	 * since the above code converts off to pages.
 	 */
 	return print_mmap(tcp, tcp->u_arg, offset);
 }

 /* Params are passed directly, offset is in pages */
 int
 sys_mmap_pgoff(struct tcb *tcp)
 {
 	/* Try test/mmap_offset_decode.c */
 	unsigned long long offset;
 	offset = (unsigned long) tcp->u_arg[5];
 	offset *= get_pagesize();
 	return print_mmap(tcp, tcp->u_arg, offset);
 }

 /* Params are passed directly, offset is in 4k units */
 int
 sys_mmap_4koff(struct tcb *tcp)
 {
 	unsigned long long offset;
 	offset = (unsigned long) tcp->u_arg[5];
 	offset <<= 12;
 	return print_mmap(tcp, tcp->u_arg, offset);
 }

 int
 sys_munmap(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%#lx, %lu",
 			tcp->u_arg[0], tcp->u_arg[1]);
 	}
 	return 0;
 }

 int
 sys_mprotect(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%#lx, %lu, ",
 			tcp->u_arg[0], tcp->u_arg[1]);
 		printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
 	}
 	return 0;
 }

 static const struct xlat mremap_flags[] = {
 	XLAT(MREMAP_MAYMOVE),
 #ifdef MREMAP_FIXED
 	XLAT(MREMAP_FIXED),
 #endif
 	XLAT_END
 };

 int
 sys_mremap(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%#lx, %lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1],
 			tcp->u_arg[2]);
 		printflags(mremap_flags, tcp->u_arg[3], "MREMAP_???");
 #ifdef MREMAP_FIXED
 		if ((tcp->u_arg[3] & (MREMAP_MAYMOVE | MREMAP_FIXED)) ==
 		    (MREMAP_MAYMOVE | MREMAP_FIXED))
 			tprintf(", %#lx", tcp->u_arg[4]);
 #endif
 	}
 	return RVAL_HEX;
 }

 static const struct xlat madvise_cmds[] = {
 #ifdef MADV_NORMAL
 	XLAT(MADV_NORMAL),
 #endif
 #ifdef MADV_RANDOM
 	XLAT(MADV_RANDOM),
 #endif
 #ifdef MADV_SEQUENTIAL
 	XLAT(MADV_SEQUENTIAL),
 #endif
 #ifdef MADV_WILLNEED
 	XLAT(MADV_WILLNEED),
 #endif
 #ifdef MADV_DONTNEED
 	XLAT(MADV_DONTNEED),
 #endif
 #ifdef MADV_REMOVE
 	XLAT(MADV_REMOVE),
 #endif
 #ifdef MADV_DONTFORK
 	XLAT(MADV_DONTFORK),
 #endif
 #ifdef MADV_DOFORK
 	XLAT(MADV_DOFORK),
 #endif
 #ifdef MADV_HWPOISON
 	XLAT(MADV_HWPOISON),
 #endif
 #ifdef MADV_SOFT_OFFLINE
 	XLAT(MADV_SOFT_OFFLINE),
 #endif
 #ifdef MADV_MERGEABLE
 	XLAT(MADV_MERGEABLE),
 #endif
 #ifdef MADV_UNMERGEABLE
 	XLAT(MADV_UNMERGEABLE),
 #endif
 #ifdef MADV_HUGEPAGE
 	XLAT(MADV_HUGEPAGE),
 #endif
 #ifdef MADV_NOHUGEPAGE
 	XLAT(MADV_NOHUGEPAGE),
 #endif
 #ifdef MADV_DONTDUMP
 	XLAT(MADV_DONTDUMP),
 #endif
 #ifdef MADV_DODUMP
 	XLAT(MADV_DODUMP),
 #endif
 	XLAT_END
 };

 int
 sys_madvise(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 		printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");
 	}
 	return 0;
 }

 static const struct xlat mlockall_flags[] = {
 #ifdef MCL_CURRENT
 	XLAT(MCL_CURRENT),
 #endif
 #ifdef MCL_FUTURE
 	XLAT(MCL_FUTURE),
 #endif
 	XLAT_END
 };

 int
 sys_mlockall(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");
 	}
 	return 0;
 }

 #ifdef MS_ASYNC

 static const struct xlat mctl_sync[] = {
 #ifdef MS_SYNC
 	XLAT(MS_SYNC),
 #endif
 	XLAT(MS_ASYNC),
 	XLAT(MS_INVALIDATE),
 	XLAT_END
 };

 int
 sys_msync(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		/* addr */
 		tprintf("%#lx", tcp->u_arg[0]);
 		/* len */
 		tprintf(", %lu, ", tcp->u_arg[1]);
 		/* flags */
 		printflags(mctl_sync, tcp->u_arg[2], "MS_???");
 	}
 	return 0;
 }

 #endif /* MS_ASYNC */

 #ifdef MC_SYNC

 static const struct xlat mctl_funcs[] = {
 	XLAT(MC_LOCK),
 	XLAT(MC_LOCKAS),
 	XLAT(MC_SYNC),
 	XLAT(MC_UNLOCK),
 	XLAT(MC_UNLOCKAS),
 	XLAT_END
 };

 static const struct xlat mctl_lockas[] = {
 	XLAT(MCL_CURRENT),
 	XLAT(MCL_FUTURE),
 	XLAT_END
 };

 int
 sys_mctl(struct tcb *tcp)
 {
 	int arg, function;

 	if (entering(tcp)) {
 		/* addr */
 		tprintf("%#lx", tcp->u_arg[0]);
 		/* len */
 		tprintf(", %lu, ", tcp->u_arg[1]);
 		/* function */
 		function = tcp->u_arg[2];
 		printflags(mctl_funcs, function, "MC_???");
 		/* arg */
 		arg = tcp->u_arg[3];
 		tprints(", ");
 		switch (function) {
 		case MC_SYNC:
 			printflags(mctl_sync, arg, "MS_???");
 			break;
 		case MC_LOCKAS:
 			printflags(mctl_lockas, arg, "MCL_???");
 			break;
 		default:
 			tprintf("%#x", arg);
 			break;
 		}
 	}
 	return 0;
 }

 #endif /* MC_SYNC */

 int
 sys_mincore(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 	} else {
 		unsigned long i, len;
 		char *vec = NULL;

 		len = tcp->u_arg[1];
 		if (syserror(tcp) || tcp->u_arg[2] == 0 ||
 			(vec = malloc(len)) == NULL ||
 			umoven(tcp, tcp->u_arg[2], len, vec) < 0)
 			tprintf("%#lx", tcp->u_arg[2]);
 		else {
 			tprints("[");
 			for (i = 0; i < len; i++) {
 				if (abbrev(tcp) && i >= max_strlen) {
 					tprints("...");
 					break;
 				}
 				tprints((vec[i] & 1) ? "1" : "0");
 			}
 			tprints("]");
 		}
 		free(vec);
 	}
 	return 0;
 }

 #if defined(ALPHA) || defined(IA64) || defined(SPARC) || defined(SPARC64)
 int
 sys_getpagesize(struct tcb *tcp)
 {
 	if (exiting(tcp))
 		return RVAL_HEX;
 	return 0;
 }
 #endif

 #if defined(I386) || defined(X86_64) || defined(X32)
 void
 print_ldt_entry(struct modify_ldt_ldt_s *ldt_entry)
 {
 	tprintf("base_addr:%#08lx, "
 		"limit:%d, "
 		"seg_32bit:%d, "
 		"contents:%d, "
 		"read_exec_only:%d, "
 		"limit_in_pages:%d, "
 		"seg_not_present:%d, "
 		"useable:%d}",
 		(long) ldt_entry->base_addr,
 		ldt_entry->limit,
 		ldt_entry->seg_32bit,
 		ldt_entry->contents,
 		ldt_entry->read_exec_only,
 		ldt_entry->limit_in_pages,
 		ldt_entry->seg_not_present,
 		ldt_entry->useable);
 }

 int
 sys_modify_ldt(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		struct modify_ldt_ldt_s copy;
 		tprintf("%ld", tcp->u_arg[0]);
 		if (tcp->u_arg[1] == 0
 				|| tcp->u_arg[2] != sizeof(struct modify_ldt_ldt_s)
 				|| umove(tcp, tcp->u_arg[1], &copy) == -1)
 			tprintf(", %lx", tcp->u_arg[1]);
 		else {
 			tprintf(", {entry_number:%d, ", copy.entry_number);
 			if (!verbose(tcp))
 				tprints("...}");
 			else {
 				print_ldt_entry(&copy);
 			}
 		}
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }

 int
 sys_set_thread_area(struct tcb *tcp)
 {
 	struct modify_ldt_ldt_s copy;
 	if (entering(tcp)) {
 		if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
 			if (copy.entry_number == -1)
 				tprintf("{entry_number:%d -> ",
 					copy.entry_number);
 			else
 				tprints("{entry_number:");
 		}
 	} else {
 		if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
 			tprintf("%d, ", copy.entry_number);
 			if (!verbose(tcp))
 				tprints("...}");
 			else {
 				print_ldt_entry(&copy);
 			}
 		} else {
 			tprintf("%lx", tcp->u_arg[0]);
 		}
 	}
 	return 0;

 }

 int
 sys_get_thread_area(struct tcb *tcp)
 {
 	struct modify_ldt_ldt_s copy;
 	if (exiting(tcp)) {
 		if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
 			tprintf("{entry_number:%d, ", copy.entry_number);
 			if (!verbose(tcp))
 				tprints("...}");
 			else {
 				print_ldt_entry(&copy);
 			}
 		} else {
 			tprintf("%lx", tcp->u_arg[0]);
 		}
 	}
 	return 0;

 }
 #endif /* I386 || X86_64 || X32 */

 #if defined(M68K) || defined(MIPS)
 int
 sys_set_thread_area(struct tcb *tcp)
 {
 	if (entering(tcp))
 		tprintf("%#lx", tcp->u_arg[0]);
 	return 0;

 }
 #endif

 #if defined(M68K)
 int
 sys_get_thread_area(struct tcb *tcp)
 {
 	return RVAL_HEX;
 }
 #endif

 int
 sys_remap_file_pages(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 		printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
 		tprintf(", %lu, ", tcp->u_arg[3]);
 #ifdef MAP_TYPE
 		printxval(mmap_flags, tcp->u_arg[4] & MAP_TYPE, "MAP_???");
 		addflags(mmap_flags, tcp->u_arg[4] & ~MAP_TYPE);
 #else
 		printflags(mmap_flags, tcp->u_arg[4], "MAP_???");
 #endif
 	}
 	return 0;
 }

 #define MPOL_DEFAULT    0
 #define MPOL_PREFERRED  1
 #define MPOL_BIND       2
 #define MPOL_INTERLEAVE 3

 #define MPOL_F_NODE     (1<<0)
 #define MPOL_F_ADDR     (1<<1)

 #define MPOL_MF_STRICT  (1<<0)
 #define MPOL_MF_MOVE	(1<<1)
 #define MPOL_MF_MOVE_ALL (1<<2)

 static const struct xlat policies[] = {
 	XLAT(MPOL_DEFAULT),
 	XLAT(MPOL_PREFERRED),
 	XLAT(MPOL_BIND),
 	XLAT(MPOL_INTERLEAVE),
 	XLAT_END
 };

 static const struct xlat mbindflags[] = {
 	XLAT(MPOL_MF_STRICT),
 	XLAT(MPOL_MF_MOVE),
 	XLAT(MPOL_MF_MOVE_ALL),
 	XLAT_END
 };

 static const struct xlat mempolicyflags[] = {
 	XLAT(MPOL_F_NODE),
 	XLAT(MPOL_F_ADDR),
 	XLAT_END
 };

 static const struct xlat move_pages_flags[] = {
 	XLAT(MPOL_MF_MOVE),
 	XLAT(MPOL_MF_MOVE_ALL),
 	XLAT_END
 };

 static void
 get_nodes(struct tcb *tcp, unsigned long ptr, unsigned long maxnodes, int err)
 {
 	unsigned long nlongs, size, end;

 	nlongs = (maxnodes + 8 * sizeof(long) - 1) / (8 * sizeof(long));
 	size = nlongs * sizeof(long);
 	end = ptr + size;
 	if (nlongs == 0 || ((err || verbose(tcp)) && (size * 8 == maxnodes)
 			    && (end > ptr))) {
 		unsigned long n, cur, abbrev_end;
 		int failed = 0;

 		if (abbrev(tcp)) {
 			abbrev_end = ptr + max_strlen * sizeof(long);
 			if (abbrev_end < ptr)
 				abbrev_end = end;
 		} else {
 			abbrev_end = end;
 		}
 		tprints(", {");
 		for (cur = ptr; cur < end; cur += sizeof(long)) {
 			if (cur > ptr)
 				tprints(", ");
 			if (cur >= abbrev_end) {
 				tprints("...");
 				break;
 			}
 			if (umoven(tcp, cur, sizeof(n), (char *) &n) < 0) {
 				tprints("?");
 				failed = 1;
 				break;
 			}
 			tprintf("%#0*lx", (int) sizeof(long) * 2 + 2, n);
 		}
 		tprints("}");
 		if (failed)
 			tprintf(" %#lx", ptr);
 	} else
 		tprintf(", %#lx", ptr);
 	tprintf(", %lu", maxnodes);
 }

 int
 sys_mbind(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 		printxval(policies, tcp->u_arg[2], "MPOL_???");
 		get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[4], 0);
 		tprints(", ");
 		printflags(mbindflags, tcp->u_arg[5], "MPOL_???");
 	}
 	return 0;
 }

 int
 sys_set_mempolicy(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printxval(policies, tcp->u_arg[0], "MPOL_???");
 		get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], 0);
 	}
 	return 0;
 }

 int
 sys_get_mempolicy(struct tcb *tcp)
 {
 	if (exiting(tcp)) {
 		int pol;
 		if (tcp->u_arg[0] == 0)
 			tprints("NULL");
 		else if (syserror(tcp) || umove(tcp, tcp->u_arg[0], &pol) < 0)
 			tprintf("%#lx", tcp->u_arg[0]);
 		else
 			printxval(policies, pol, "MPOL_???");
 		get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], syserror(tcp));
 		tprintf(", %#lx, ", tcp->u_arg[3]);
 		printflags(mempolicyflags, tcp->u_arg[4], "MPOL_???");
 	}
 	return 0;
 }

 int
 sys_migrate_pages(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", (long) (pid_t) tcp->u_arg[0]);
 		get_nodes(tcp, tcp->u_arg[2], tcp->u_arg[1], 0);
 		tprints(", ");
 		get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[1], 0);
 	}
 	return 0;
 }

 int
 sys_move_pages(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		unsigned long npages = tcp->u_arg[1];
 		tprintf("%ld, %lu, ", tcp->u_arg[0], npages);
 		if (tcp->u_arg[2] == 0)
 			tprints("NULL, ");
 		else {
 			int i;
 			long puser = tcp->u_arg[2];
 			tprints("{");
 			for (i = 0; i < npages; ++i) {
 				void *p;
 				if (i > 0)
 					tprints(", ");
 				if (umove(tcp, puser, &p) < 0) {
 					tprints("???");
 					break;
 				}
 				tprintf("%p", p);
 				puser += sizeof(void *);
 			}
 			tprints("}, ");
 		}
 		if (tcp->u_arg[3] == 0)
 			tprints("NULL, ");
 		else {
 			int i;
 			long nodeuser = tcp->u_arg[3];
 			tprints("{");
 			for (i = 0; i < npages; ++i) {
 				int node;
 				if (i > 0)
 					tprints(", ");
 				if (umove(tcp, nodeuser, &node) < 0) {
 					tprints("???");
 					break;
 				}
 				tprintf("%#x", node);
 				nodeuser += sizeof(int);
 			}
 			tprints("}, ");
 		}
 	}
 	if (exiting(tcp)) {
 		unsigned long npages = tcp->u_arg[1];
 		if (tcp->u_arg[4] == 0)
 			tprints("NULL, ");
 		else {
 			int i;
 			long statususer = tcp->u_arg[4];
 			tprints("{");
 			for (i = 0; i < npages; ++i) {
 				int status;
 				if (i > 0)
 					tprints(", ");
 				if (umove(tcp, statususer, &status) < 0) {
 					tprints("???");
 					break;
 				}
 				tprintf("%#x", status);
 				statususer += sizeof(int);
 			}
 			tprints("}, ");
 		}
 		printflags(move_pages_flags, tcp->u_arg[5], "MPOL_???");
 	}
 	return 0;
 }

 #if defined(POWERPC)
 int
 sys_subpage_prot(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		unsigned long cur, end, abbrev_end, entries;
 		unsigned int entry;

 		tprintf("%#lx, %#lx, ", tcp->u_arg[0], tcp->u_arg[1]);
 		entries = tcp->u_arg[1] >> 16;
 		if (!entries || !tcp->u_arg[2]) {
 			tprints("{}");
 			return 0;
 		}
 		cur = tcp->u_arg[2];
 		end = cur + (sizeof(int) * entries);
 		if (!verbose(tcp) || end < tcp->u_arg[2]) {
 			tprintf("%#lx", tcp->u_arg[2]);
 			return 0;
 		}
 		if (abbrev(tcp)) {
 			abbrev_end = cur + (sizeof(int) * max_strlen);
 			if (abbrev_end > end)
 				abbrev_end = end;
 		}
 		else
 			abbrev_end = end;
 		tprints("{");
 		for (; cur < end; cur += sizeof(int)) {
 			if (cur > tcp->u_arg[2])
 				tprints(", ");
 			if (cur >= abbrev_end) {
 				tprints("...");
 				break;
 			}
 			if (umove(tcp, cur, &entry) < 0) {
 				tprintf("??? [%#lx]", cur);
 				break;
 			}
 			else
 				tprintf("%#08x", entry);
 		}
 		tprints("}");
 	}

 	return 0;
 }
 #endif
	/*
	* 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) 2000 PocketPenguins Inc. Linux for Hitachi SuperH
	* port by Greg Banks <gbanks@pocketpenguins.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.
	*/

	#include "defs.h"
	#include <asm/mman.h>
	#include <sys/mman.h>
	#if defined(I386) \|\| defined(X86_64) \|\| defined(X32)
	# include <asm/ldt.h>
	# ifdef HAVE_STRUCT_USER_DESC
	# define modify_ldt_ldt_s user_desc
	# endif
	#endif /* I386 \|\| X86_64 \|\| X32 */

	static unsigned long
	get_pagesize()
	{
	static unsigned long pagesize;

	if (!pagesize)
	pagesize = sysconf(_SC_PAGESIZE);
	return pagesize;
	}

	int
	sys_brk(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%#lx", tcp->u_arg[0]);
	}
	return RVAL_HEX;
	}

	static const struct xlat mmap_prot[] = {
	XLAT(PROT_NONE),
	XLAT(PROT_READ),
	XLAT(PROT_WRITE),
	XLAT(PROT_EXEC),
	#ifdef PROT_SEM
	XLAT(PROT_SEM),
	#endif
	#ifdef PROT_GROWSDOWN
	XLAT(PROT_GROWSDOWN),
	#endif
	#ifdef PROT_GROWSUP
	XLAT(PROT_GROWSUP),
	#endif
	#ifdef PROT_SAO
	XLAT(PROT_SAO),
	#endif
	XLAT_END
	};

	static const struct xlat mmap_flags[] = {
	XLAT(MAP_SHARED),
	XLAT(MAP_PRIVATE),
	XLAT(MAP_FIXED),
	#ifdef MAP_ANONYMOUS
	XLAT(MAP_ANONYMOUS),
	#endif
	#ifdef MAP_32BIT
	XLAT(MAP_32BIT),
	#endif
	#ifdef MAP_RENAME
	XLAT(MAP_RENAME),
	#endif
	#ifdef MAP_NORESERVE
	XLAT(MAP_NORESERVE),
	#endif
	#ifdef MAP_POPULATE
	XLAT(MAP_POPULATE),
	#endif
	#ifdef MAP_NONBLOCK
	XLAT(MAP_NONBLOCK),
	#endif
	/*
	* XXX - this was introduced in SunOS 4.x to distinguish between
	* the old pre-4.x "mmap()", which:
	*
	* only let you map devices with an "mmap" routine (e.g.,
	* frame buffers) in;
	*
	* required you to specify the mapping address;
	*
	* returned 0 on success and -1 on failure;
	*
	* memory and which, and the 4.x "mmap()" which:
	*
	* can map plain files;
	*
	* can be asked to pick where to map the file;
	*
	* returns the address where it mapped the file on success
	* and -1 on failure.
	*
	* It's not actually used in source code that calls "mmap()"; the
	* "mmap()" routine adds it for you.
	*
	* It'd be nice to come up with some way of eliminating it from
	* the flags, e.g. reporting calls without it as "old_mmap()"
	* and calls with it as "mmap()".
	*/
	#ifdef _MAP_NEW
	XLAT(_MAP_NEW),
	#endif
	#ifdef MAP_GROWSDOWN
	XLAT(MAP_GROWSDOWN),
	#endif
	#ifdef MAP_DENYWRITE
	XLAT(MAP_DENYWRITE),
	#endif
	#ifdef MAP_EXECUTABLE
	XLAT(MAP_EXECUTABLE),
	#endif
	#ifdef MAP_INHERIT
	XLAT(MAP_INHERIT),
	#endif
	#ifdef MAP_FILE
	XLAT(MAP_FILE),
	#endif
	#ifdef MAP_LOCKED
	XLAT(MAP_LOCKED),
	#endif
	/* FreeBSD ones */
	#if defined(MAP_ANON) && (!defined(MAP_ANONYMOUS) \|\| MAP_ANON != MAP_ANONYMOUS)
	XLAT(MAP_ANON),
	#endif
	#ifdef MAP_HASSEMAPHORE
	XLAT(MAP_HASSEMAPHORE),
	#endif
	#ifdef MAP_STACK
	XLAT(MAP_STACK),
	#endif
	#ifdef MAP_HUGETLB
	XLAT(MAP_HUGETLB),
	#endif
	#if defined MAP_UNINITIALIZED && MAP_UNINITIALIZED > 0
	XLAT(MAP_UNINITIALIZED),
	#endif
	#ifdef MAP_NOSYNC
	XLAT(MAP_NOSYNC),
	#endif
	#ifdef MAP_NOCORE
	XLAT(MAP_NOCORE),
	#endif
	XLAT_END
	};

	static int
	print_mmap(struct tcb tcp, long u_arg, unsigned long long offset)
	{
	if (entering(tcp)) {
	/* addr */
	if (!u_arg[0])
	tprints("NULL, ");
	else
	tprintf("%#lx, ", u_arg[0]);
	/* len */
	tprintf("%lu, ", u_arg[1]);
	/* prot */
	printflags(mmap_prot, u_arg[2], "PROT_???");
	tprints(", ");
	/* flags */
	#ifdef MAP_TYPE
	printxval(mmap_flags, u_arg[3] & MAP_TYPE, "MAP_???");
	addflags(mmap_flags, u_arg[3] & ~MAP_TYPE);
	#else
	printflags(mmap_flags, u_arg[3], "MAP_???");
	#endif
	tprints(", ");
	/* fd */
	printfd(tcp, u_arg[4]);
	/* offset */
	tprintf(", %#llx", offset);
	}
	return RVAL_HEX;
	}

	/* Syscall name<->function correspondence is messed up on many arches.
	* For example:
	* i386 has __NR_mmap == 90, and it is "old mmap", and
	* also it has __NR_mmap2 == 192, which is a "new mmap with page offsets".
	* But x86_64 has just one __NR_mmap == 9, a "new mmap with byte offsets".
	* Confused? Me too!
	*/

	/* Params are pointed to by u_arg[0], offset is in bytes */
	int
	sys_old_mmap(struct tcb *tcp)
	{
	long u_arg[6];
	#if defined(IA64)
	/*
	* IA64 processes never call this routine, they only use the
	* new 'sys_mmap' interface. Only IA32 processes come here.
	*/
	int i;
	unsigned narrow_arg[6];
	if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
	return 0;
	for (i = 0; i < 6; i++)
	u_arg[i] = (unsigned long) narrow_arg[i];
	#elif defined(X86_64)
	/* We are here only in personality 1 (i386) */
	int i;
	unsigned narrow_arg[6];
	if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
	return 0;
	for (i = 0; i < 6; ++i)
	u_arg[i] = (unsigned long) narrow_arg[i];
	#else
	if (umoven(tcp, tcp->u_arg[0], sizeof(u_arg), (char *) u_arg) == -1)
	return 0;
	#endif
	return print_mmap(tcp, u_arg, (unsigned long) u_arg[5]);
	}

	#if defined(S390)
	/* Params are pointed to by u_arg[0], offset is in pages */
	int
	sys_old_mmap_pgoff(struct tcb *tcp)
	{
	long u_arg[5];
	int i;
	unsigned narrow_arg[6];
	unsigned long long offset;
	if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
	return 0;
	for (i = 0; i < 5; i++)
	u_arg[i] = (unsigned long) narrow_arg[i];
	offset = narrow_arg[5];
	offset *= get_pagesize();
	return print_mmap(tcp, u_arg, offset);
	}
	#endif

	/* Params are passed directly, offset is in bytes */
	int
	sys_mmap(struct tcb *tcp)
	{
	unsigned long long offset = (unsigned long) tcp->u_arg[5];
	#if defined(LINUX_MIPSN32) \|\| defined(X32)
	/* Try test/x32_mmap.c */
	offset = tcp->ext_arg[5];
	#endif
	/* Example of kernel-side handling of this variety of mmap:
	* arch/x86/kernel/sys_x86_64.c::SYSCALL_DEFINE6(mmap, ...) calls
	* sys_mmap_pgoff(..., off >> PAGE_SHIFT); i.e. off is in bytes,
	* since the above code converts off to pages.
	*/
	return print_mmap(tcp, tcp->u_arg, offset);
	}

	/* Params are passed directly, offset is in pages */
	int
	sys_mmap_pgoff(struct tcb *tcp)
	{
	/* Try test/mmap_offset_decode.c */
	unsigned long long offset;
	offset = (unsigned long) tcp->u_arg[5];
	offset *= get_pagesize();
	return print_mmap(tcp, tcp->u_arg, offset);
	}

	/* Params are passed directly, offset is in 4k units */
	int
	sys_mmap_4koff(struct tcb *tcp)
	{
	unsigned long long offset;
	offset = (unsigned long) tcp->u_arg[5];
	offset <<= 12;
	return print_mmap(tcp, tcp->u_arg, offset);
	}

	int
	sys_munmap(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%#lx, %lu",
	tcp->u_arg[0], tcp->u_arg[1]);
	}
	return 0;
	}

	int
	sys_mprotect(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%#lx, %lu, ",
	tcp->u_arg[0], tcp->u_arg[1]);
	printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
	}
	return 0;
	}

	static const struct xlat mremap_flags[] = {
	XLAT(MREMAP_MAYMOVE),
	#ifdef MREMAP_FIXED
	XLAT(MREMAP_FIXED),
	#endif
	XLAT_END
	};

	int
	sys_mremap(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%#lx, %lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1],
	tcp->u_arg[2]);
	printflags(mremap_flags, tcp->u_arg[3], "MREMAP_???");
	#ifdef MREMAP_FIXED
	if ((tcp->u_arg[3] & (MREMAP_MAYMOVE \| MREMAP_FIXED)) ==
	(MREMAP_MAYMOVE \| MREMAP_FIXED))
	tprintf(", %#lx", tcp->u_arg[4]);
	#endif
	}
	return RVAL_HEX;
	}

	static const struct xlat madvise_cmds[] = {
	#ifdef MADV_NORMAL
	XLAT(MADV_NORMAL),
	#endif
	#ifdef MADV_RANDOM
	XLAT(MADV_RANDOM),
	#endif
	#ifdef MADV_SEQUENTIAL
	XLAT(MADV_SEQUENTIAL),
	#endif
	#ifdef MADV_WILLNEED
	XLAT(MADV_WILLNEED),
	#endif
	#ifdef MADV_DONTNEED
	XLAT(MADV_DONTNEED),
	#endif
	#ifdef MADV_REMOVE
	XLAT(MADV_REMOVE),
	#endif
	#ifdef MADV_DONTFORK
	XLAT(MADV_DONTFORK),
	#endif
	#ifdef MADV_DOFORK
	XLAT(MADV_DOFORK),
	#endif
	#ifdef MADV_HWPOISON
	XLAT(MADV_HWPOISON),
	#endif
	#ifdef MADV_SOFT_OFFLINE
	XLAT(MADV_SOFT_OFFLINE),
	#endif
	#ifdef MADV_MERGEABLE
	XLAT(MADV_MERGEABLE),
	#endif
	#ifdef MADV_UNMERGEABLE
	XLAT(MADV_UNMERGEABLE),
	#endif
	#ifdef MADV_HUGEPAGE
	XLAT(MADV_HUGEPAGE),
	#endif
	#ifdef MADV_NOHUGEPAGE
	XLAT(MADV_NOHUGEPAGE),
	#endif
	#ifdef MADV_DONTDUMP
	XLAT(MADV_DONTDUMP),
	#endif
	#ifdef MADV_DODUMP
	XLAT(MADV_DODUMP),
	#endif
	XLAT_END
	};

	int
	sys_madvise(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
	printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");
	}
	return 0;
	}

	static const struct xlat mlockall_flags[] = {
	#ifdef MCL_CURRENT
	XLAT(MCL_CURRENT),
	#endif
	#ifdef MCL_FUTURE
	XLAT(MCL_FUTURE),
	#endif
	XLAT_END
	};

	int
	sys_mlockall(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");
	}
	return 0;
	}

	#ifdef MS_ASYNC

	static const struct xlat mctl_sync[] = {
	#ifdef MS_SYNC
	XLAT(MS_SYNC),
	#endif
	XLAT(MS_ASYNC),
	XLAT(MS_INVALIDATE),
	XLAT_END
	};

	int
	sys_msync(struct tcb *tcp)
	{
	if (entering(tcp)) {
	/* addr */
	tprintf("%#lx", tcp->u_arg[0]);
	/* len */
	tprintf(", %lu, ", tcp->u_arg[1]);
	/* flags */
	printflags(mctl_sync, tcp->u_arg[2], "MS_???");
	}
	return 0;
	}

	#endif /* MS_ASYNC */

	#ifdef MC_SYNC

	static const struct xlat mctl_funcs[] = {
	XLAT(MC_LOCK),
	XLAT(MC_LOCKAS),
	XLAT(MC_SYNC),
	XLAT(MC_UNLOCK),
	XLAT(MC_UNLOCKAS),
	XLAT_END
	};

	static const struct xlat mctl_lockas[] = {
	XLAT(MCL_CURRENT),
	XLAT(MCL_FUTURE),
	XLAT_END
	};

	int
	sys_mctl(struct tcb *tcp)
	{
	int arg, function;

	if (entering(tcp)) {
	/* addr */
	tprintf("%#lx", tcp->u_arg[0]);
	/* len */
	tprintf(", %lu, ", tcp->u_arg[1]);
	/* function */
	function = tcp->u_arg[2];
	printflags(mctl_funcs, function, "MC_???");
	/* arg */
	arg = tcp->u_arg[3];
	tprints(", ");
	switch (function) {
	case MC_SYNC:
	printflags(mctl_sync, arg, "MS_???");
	break;
	case MC_LOCKAS:
	printflags(mctl_lockas, arg, "MCL_???");
	break;
	default:
	tprintf("%#x", arg);
	break;
	}
	}
	return 0;
	}

	#endif /* MC_SYNC */

	int
	sys_mincore(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
	} else {
	unsigned long i, len;
	char *vec = NULL;

	len = tcp->u_arg[1];
	if (syserror(tcp) \|\| tcp->u_arg[2] == 0 \|\|
	(vec = malloc(len)) == NULL \|\|
	umoven(tcp, tcp->u_arg[2], len, vec) < 0)
	tprintf("%#lx", tcp->u_arg[2]);
	else {
	tprints("[");
	for (i = 0; i < len; i++) {
	if (abbrev(tcp) && i >= max_strlen) {
	tprints("...");
	break;
	}
	tprints((vec[i] & 1) ? "1" : "0");
	}
	tprints("]");
	}
	free(vec);
	}
	return 0;
	}

	#if defined(ALPHA) \|\| defined(IA64) \|\| defined(SPARC) \|\| defined(SPARC64)
	int
	sys_getpagesize(struct tcb *tcp)
	{
	if (exiting(tcp))
	return RVAL_HEX;
	return 0;
	}
	#endif

	#if defined(I386) \|\| defined(X86_64) \|\| defined(X32)
	void
	print_ldt_entry(struct modify_ldt_ldt_s *ldt_entry)
	{
	tprintf("base_addr:%#08lx, "
	"limit:%d, "
	"seg_32bit:%d, "
	"contents:%d, "
	"read_exec_only:%d, "
	"limit_in_pages:%d, "
	"seg_not_present:%d, "
	"useable:%d}",
	(long) ldt_entry->base_addr,
	ldt_entry->limit,
	ldt_entry->seg_32bit,
	ldt_entry->contents,
	ldt_entry->read_exec_only,
	ldt_entry->limit_in_pages,
	ldt_entry->seg_not_present,
	ldt_entry->useable);
	}

	int
	sys_modify_ldt(struct tcb *tcp)
	{
	if (entering(tcp)) {
	struct modify_ldt_ldt_s copy;
	tprintf("%ld", tcp->u_arg[0]);
	if (tcp->u_arg[1] == 0
	\|\| tcp->u_arg[2] != sizeof(struct modify_ldt_ldt_s)
	\|\| umove(tcp, tcp->u_arg[1], &copy) == -1)
	tprintf(", %lx", tcp->u_arg[1]);
	else {
	tprintf(", {entry_number:%d, ", copy.entry_number);
	if (!verbose(tcp))
	tprints("...}");
	else {
	print_ldt_entry(&copy);
	}
	}
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}

	int
	sys_set_thread_area(struct tcb *tcp)
	{
	struct modify_ldt_ldt_s copy;
	if (entering(tcp)) {
	if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
	if (copy.entry_number == -1)
	tprintf("{entry_number:%d -> ",
	copy.entry_number);
	else
	tprints("{entry_number:");
	}
	} else {
	if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
	tprintf("%d, ", copy.entry_number);
	if (!verbose(tcp))
	tprints("...}");
	else {
	print_ldt_entry(&copy);
	}
	} else {
	tprintf("%lx", tcp->u_arg[0]);
	}
	}
	return 0;

	}

	int
	sys_get_thread_area(struct tcb *tcp)
	{
	struct modify_ldt_ldt_s copy;
	if (exiting(tcp)) {
	if (umove(tcp, tcp->u_arg[0], &copy) != -1) {
	tprintf("{entry_number:%d, ", copy.entry_number);
	if (!verbose(tcp))
	tprints("...}");
	else {
	print_ldt_entry(&copy);
	}
	} else {
	tprintf("%lx", tcp->u_arg[0]);
	}
	}
	return 0;

	}
	#endif /* I386 \|\| X86_64 \|\| X32 */

	#if defined(M68K) \|\| defined(MIPS)
	int
	sys_set_thread_area(struct tcb *tcp)
	{
	if (entering(tcp))
	tprintf("%#lx", tcp->u_arg[0]);
	return 0;

	}
	#endif

	#if defined(M68K)
	int
	sys_get_thread_area(struct tcb *tcp)
	{
	return RVAL_HEX;
	}
	#endif

	int
	sys_remap_file_pages(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
	printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
	tprintf(", %lu, ", tcp->u_arg[3]);
	#ifdef MAP_TYPE
	printxval(mmap_flags, tcp->u_arg[4] & MAP_TYPE, "MAP_???");
	addflags(mmap_flags, tcp->u_arg[4] & ~MAP_TYPE);
	#else
	printflags(mmap_flags, tcp->u_arg[4], "MAP_???");
	#endif
	}
	return 0;
	}

	#define MPOL_DEFAULT 0
	#define MPOL_PREFERRED 1
	#define MPOL_BIND 2
	#define MPOL_INTERLEAVE 3

	#define MPOL_F_NODE (1<<0)
	#define MPOL_F_ADDR (1<<1)

	#define MPOL_MF_STRICT (1<<0)
	#define MPOL_MF_MOVE (1<<1)
	#define MPOL_MF_MOVE_ALL (1<<2)

	static const struct xlat policies[] = {
	XLAT(MPOL_DEFAULT),
	XLAT(MPOL_PREFERRED),
	XLAT(MPOL_BIND),
	XLAT(MPOL_INTERLEAVE),
	XLAT_END
	};

	static const struct xlat mbindflags[] = {
	XLAT(MPOL_MF_STRICT),
	XLAT(MPOL_MF_MOVE),
	XLAT(MPOL_MF_MOVE_ALL),
	XLAT_END
	};

	static const struct xlat mempolicyflags[] = {
	XLAT(MPOL_F_NODE),
	XLAT(MPOL_F_ADDR),
	XLAT_END
	};

	static const struct xlat move_pages_flags[] = {
	XLAT(MPOL_MF_MOVE),
	XLAT(MPOL_MF_MOVE_ALL),
	XLAT_END
	};

	static void
	get_nodes(struct tcb *tcp, unsigned long ptr, unsigned long maxnodes, int err)
	{
	unsigned long nlongs, size, end;

	nlongs = (maxnodes + 8 * sizeof(long) - 1) / (8 * sizeof(long));
	size = nlongs * sizeof(long);
	end = ptr + size;
	if (nlongs == 0 \|\| ((err \|\| verbose(tcp)) && (size * 8 == maxnodes)
	&& (end > ptr))) {
	unsigned long n, cur, abbrev_end;
	int failed = 0;

	if (abbrev(tcp)) {
	abbrev_end = ptr + max_strlen * sizeof(long);
	if (abbrev_end < ptr)
	abbrev_end = end;
	} else {
	abbrev_end = end;
	}
	tprints(", {");
	for (cur = ptr; cur < end; cur += sizeof(long)) {
	if (cur > ptr)
	tprints(", ");
	if (cur >= abbrev_end) {
	tprints("...");
	break;
	}
	if (umoven(tcp, cur, sizeof(n), (char *) &n) < 0) {
	tprints("?");
	failed = 1;
	break;
	}
	tprintf("%#0lx", (int) sizeof(long) 2 + 2, n);
	}
	tprints("}");
	if (failed)
	tprintf(" %#lx", ptr);
	} else
	tprintf(", %#lx", ptr);
	tprintf(", %lu", maxnodes);
	}

	int
	sys_mbind(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
	printxval(policies, tcp->u_arg[2], "MPOL_???");
	get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[4], 0);
	tprints(", ");
	printflags(mbindflags, tcp->u_arg[5], "MPOL_???");
	}
	return 0;
	}

	int
	sys_set_mempolicy(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printxval(policies, tcp->u_arg[0], "MPOL_???");
	get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], 0);
	}
	return 0;
	}

	int
	sys_get_mempolicy(struct tcb *tcp)
	{
	if (exiting(tcp)) {
	int pol;
	if (tcp->u_arg[0] == 0)
	tprints("NULL");
	else if (syserror(tcp) \|\| umove(tcp, tcp->u_arg[0], &pol) < 0)
	tprintf("%#lx", tcp->u_arg[0]);
	else
	printxval(policies, pol, "MPOL_???");
	get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], syserror(tcp));
	tprintf(", %#lx, ", tcp->u_arg[3]);
	printflags(mempolicyflags, tcp->u_arg[4], "MPOL_???");
	}
	return 0;
	}

	int
	sys_migrate_pages(struct tcb *tcp)
	{
	if (entering(tcp)) {
	tprintf("%ld, ", (long) (pid_t) tcp->u_arg[0]);
	get_nodes(tcp, tcp->u_arg[2], tcp->u_arg[1], 0);
	tprints(", ");
	get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[1], 0);
	}
	return 0;
	}

	int
	sys_move_pages(struct tcb *tcp)
	{
	if (entering(tcp)) {
	unsigned long npages = tcp->u_arg[1];
	tprintf("%ld, %lu, ", tcp->u_arg[0], npages);
	if (tcp->u_arg[2] == 0)
	tprints("NULL, ");
	else {
	int i;
	long puser = tcp->u_arg[2];
	tprints("{");
	for (i = 0; i < npages; ++i) {
	void *p;
	if (i > 0)
	tprints(", ");
	if (umove(tcp, puser, &p) < 0) {
	tprints("???");
	break;
	}
	tprintf("%p", p);
	puser += sizeof(void *);
	}
	tprints("}, ");
	}
	if (tcp->u_arg[3] == 0)
	tprints("NULL, ");
	else {
	int i;
	long nodeuser = tcp->u_arg[3];
	tprints("{");
	for (i = 0; i < npages; ++i) {
	int node;
	if (i > 0)
	tprints(", ");
	if (umove(tcp, nodeuser, &node) < 0) {
	tprints("???");
	break;
	}
	tprintf("%#x", node);
	nodeuser += sizeof(int);
	}
	tprints("}, ");
	}
	}
	if (exiting(tcp)) {
	unsigned long npages = tcp->u_arg[1];
	if (tcp->u_arg[4] == 0)
	tprints("NULL, ");
	else {
	int i;
	long statususer = tcp->u_arg[4];
	tprints("{");
	for (i = 0; i < npages; ++i) {
	int status;
	if (i > 0)
	tprints(", ");
	if (umove(tcp, statususer, &status) < 0) {
	tprints("???");
	break;
	}
	tprintf("%#x", status);
	statususer += sizeof(int);
	}
	tprints("}, ");
	}
	printflags(move_pages_flags, tcp->u_arg[5], "MPOL_???");
	}
	return 0;
	}

	#if defined(POWERPC)
	int
	sys_subpage_prot(struct tcb *tcp)
	{
	if (entering(tcp)) {
	unsigned long cur, end, abbrev_end, entries;
	unsigned int entry;

	tprintf("%#lx, %#lx, ", tcp->u_arg[0], tcp->u_arg[1]);
	entries = tcp->u_arg[1] >> 16;
	if (!entries \|\| !tcp->u_arg[2]) {
	tprints("{}");
	return 0;
	}
	cur = tcp->u_arg[2];
	end = cur + (sizeof(int) * entries);
	if (!verbose(tcp) \|\| end < tcp->u_arg[2]) {
	tprintf("%#lx", tcp->u_arg[2]);
	return 0;
	}
	if (abbrev(tcp)) {
	abbrev_end = cur + (sizeof(int) * max_strlen);
	if (abbrev_end > end)
	abbrev_end = end;
	}
	else
	abbrev_end = end;
	tprints("{");
	for (; cur < end; cur += sizeof(int)) {
	if (cur > tcp->u_arg[2])
	tprints(", ");
	if (cur >= abbrev_end) {
	tprints("...");
	break;
	}
	if (umove(tcp, cur, &entry) < 0) {
	tprintf("??? [%#lx]", cur);
	break;
	}
	else
	tprintf("%#08x", entry);
	}
	tprints("}");
	}

	return 0;
	}
	#endif