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>

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

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

 SYS_FUNC(brk)
 {
 	printaddr(tcp->u_arg[0]);

 	return RVAL_DECODED | RVAL_HEX;
 }

 #include "xlat/mmap_prot.h"
 #include "xlat/mmap_flags.h"

 static void
 print_mmap(struct tcb *tcp, long *u_arg, unsigned long long offset)
 {
 	/* addr */
 	printaddr(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);
 }

 /* 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 */
 SYS_FUNC(old_mmap)
 {
 	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), 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), 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), u_arg) == -1)
 		return 0;
 #endif
 	print_mmap(tcp, u_arg, (unsigned long) u_arg[5]);

 	return RVAL_DECODED | RVAL_HEX;
 }

 #if defined(S390)
 /* Params are pointed to by u_arg[0], offset is in pages */
 SYS_FUNC(old_mmap_pgoff)
 {
 	long u_arg[5];
 	int i;
 	unsigned narrow_arg[6];
 	unsigned long long offset;
 	if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), 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();
 	print_mmap(tcp, u_arg, offset);

 	return RVAL_DECODED | RVAL_HEX;
 }
 #endif

 /* Params are passed directly, offset is in bytes */
 SYS_FUNC(mmap)
 {
 	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.
 	 */
 	print_mmap(tcp, tcp->u_arg, offset);

 	return RVAL_DECODED | RVAL_HEX;
 }

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

 	return RVAL_DECODED | RVAL_HEX;
 }

 /* Params are passed directly, offset is in 4k units */
 SYS_FUNC(mmap_4koff)
 {
 	unsigned long long offset;
 	offset = (unsigned long) tcp->u_arg[5];
 	offset <<= 12;
 	print_mmap(tcp, tcp->u_arg, offset);

 	return RVAL_DECODED | RVAL_HEX;
 }

 SYS_FUNC(munmap)
 {
 	printaddr(tcp->u_arg[0]);
 	tprintf(", %lu", tcp->u_arg[1]);

 	return RVAL_DECODED;
 }

 SYS_FUNC(mprotect)
 {
 	printaddr(tcp->u_arg[0]);
 	tprintf(", %lu, ", tcp->u_arg[1]);
 	printflags(mmap_prot, tcp->u_arg[2], "PROT_???");

 	return RVAL_DECODED;
 }

 #include "xlat/mremap_flags.h"

 SYS_FUNC(mremap)
 {
 	printaddr(tcp->u_arg[0]);
 	tprintf(", %lu, %lu, ", 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)) {
 		tprints(", ");
 		printaddr(tcp->u_arg[4]);
 	}
 #endif
 	return RVAL_DECODED | RVAL_HEX;
 }

 #include "xlat/madvise_cmds.h"

 SYS_FUNC(madvise)
 {
 	printaddr(tcp->u_arg[0]);
 	tprintf(", %lu, ", tcp->u_arg[1]);
 	printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");

 	return RVAL_DECODED;
 }

 #include "xlat/mlockall_flags.h"

 SYS_FUNC(mlockall)
 {
 	printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");

 	return RVAL_DECODED;
 }

 #include "xlat/mctl_sync.h"

 SYS_FUNC(msync)
 {
 	/* addr */
 	printaddr(tcp->u_arg[0]);
 	/* len */
 	tprintf(", %lu, ", tcp->u_arg[1]);
 	/* flags */
 	printflags(mctl_sync, tcp->u_arg[2], "MS_???");

 	return RVAL_DECODED;
 }

 SYS_FUNC(mincore)
 {
 	if (entering(tcp)) {
 		printaddr(tcp->u_arg[0]);
 		tprintf(", %lu, ", tcp->u_arg[1]);
 	} else {
 		unsigned long i, len;
 		char *vec = NULL;

 		len = tcp->u_arg[1];
 		if (syserror(tcp) || !verbose(tcp) ||
 		    !tcp->u_arg[2] || !(vec = malloc(len)) ||
 		    umoven(tcp, tcp->u_arg[2], len, vec) < 0)
 			printaddr(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)
 SYS_FUNC(getpagesize)
 {
 	if (exiting(tcp))
 		return RVAL_HEX;
 	return 0;
 }
 #endif

 SYS_FUNC(remap_file_pages)
 {
 	printaddr(tcp->u_arg[0]);
 	tprintf(", %lu, ", 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 RVAL_DECODED;
 }

 #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)

 #include "xlat/policies.h"
 #include "xlat/mbindflags.h"
 #include "xlat/mempolicyflags.h"
 #include "xlat/move_pages_flags.h"

 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), &n) < 0) {
 				tprints("?");
 				failed = 1;
 				break;
 			}
 			tprintf("%#0*lx", (int) sizeof(long) * 2 + 2, n);
 		}
 		tprints("}");
 		if (failed) {
 			tprints(" ");
 			printaddr(ptr);
 		}
 	} else {
 		tprints(" ");
 		printaddr(ptr);
 	}
 	tprintf(", %lu", maxnodes);
 }

 SYS_FUNC(mbind)
 {
 	printaddr(tcp->u_arg[0]);
 	tprintf(", %lu, ", 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 RVAL_DECODED;
 }

 SYS_FUNC(set_mempolicy)
 {
 	printxval(policies, tcp->u_arg[0], "MPOL_???");
 	get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], 0);

 	return RVAL_DECODED;
 }

 SYS_FUNC(get_mempolicy)
 {
 	if (exiting(tcp)) {
 		int pol;
 		if (!umove_or_printaddr(tcp, tcp->u_arg[0], &pol))
 			printxval(policies, pol, "MPOL_???");
 		get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], syserror(tcp));
 		tprints(", ");
 		printaddr(tcp->u_arg[3]);
 		tprints(", ");
 		printflags(mempolicyflags, tcp->u_arg[4], "MPOL_???");
 	}
 	return 0;
 }

 SYS_FUNC(migrate_pages)
 {
 	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 RVAL_DECODED;
 }

 SYS_FUNC(move_pages)
 {
 	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 {
 			unsigned 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 {
 			unsigned 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("}, ");
 		}
 	} else {
 		unsigned long npages = tcp->u_arg[1];
 		if (tcp->u_arg[4] == 0)
 			tprints("NULL, ");
 		else {
 			unsigned 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)
 SYS_FUNC(subpage_prot)
 {
 	unsigned long cur, end, abbrev_end, entries;
 	unsigned int entry;

 	printaddr(tcp->u_arg[0]);
 	tprints(", ");
 	printaddr(tcp->u_arg[1]);
 	tprints(", ");
 	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 < (unsigned long) tcp->u_arg[2]) {
 		printaddr(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 > (unsigned long) 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 RVAL_DECODED;
 }
 #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>

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

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

	SYS_FUNC(brk)
	{
	printaddr(tcp->u_arg[0]);

	return RVAL_DECODED \| RVAL_HEX;
	}

	#include "xlat/mmap_prot.h"
	#include "xlat/mmap_flags.h"

	static void
	print_mmap(struct tcb tcp, long u_arg, unsigned long long offset)
	{
	/* addr */
	printaddr(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);
	}

	/* 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 */
	SYS_FUNC(old_mmap)
	{
	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), 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), 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), u_arg) == -1)
	return 0;
	#endif
	print_mmap(tcp, u_arg, (unsigned long) u_arg[5]);

	return RVAL_DECODED \| RVAL_HEX;
	}

	#if defined(S390)
	/* Params are pointed to by u_arg[0], offset is in pages */
	SYS_FUNC(old_mmap_pgoff)
	{
	long u_arg[5];
	int i;
	unsigned narrow_arg[6];
	unsigned long long offset;
	if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), 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();
	print_mmap(tcp, u_arg, offset);

	return RVAL_DECODED \| RVAL_HEX;
	}
	#endif

	/* Params are passed directly, offset is in bytes */
	SYS_FUNC(mmap)
	{
	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.
	*/
	print_mmap(tcp, tcp->u_arg, offset);

	return RVAL_DECODED \| RVAL_HEX;
	}

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

	return RVAL_DECODED \| RVAL_HEX;
	}

	/* Params are passed directly, offset is in 4k units */
	SYS_FUNC(mmap_4koff)
	{
	unsigned long long offset;
	offset = (unsigned long) tcp->u_arg[5];
	offset <<= 12;
	print_mmap(tcp, tcp->u_arg, offset);

	return RVAL_DECODED \| RVAL_HEX;
	}

	SYS_FUNC(munmap)
	{
	printaddr(tcp->u_arg[0]);
	tprintf(", %lu", tcp->u_arg[1]);

	return RVAL_DECODED;
	}

	SYS_FUNC(mprotect)
	{
	printaddr(tcp->u_arg[0]);
	tprintf(", %lu, ", tcp->u_arg[1]);
	printflags(mmap_prot, tcp->u_arg[2], "PROT_???");

	return RVAL_DECODED;
	}

	#include "xlat/mremap_flags.h"

	SYS_FUNC(mremap)
	{
	printaddr(tcp->u_arg[0]);
	tprintf(", %lu, %lu, ", 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)) {
	tprints(", ");
	printaddr(tcp->u_arg[4]);
	}
	#endif
	return RVAL_DECODED \| RVAL_HEX;
	}

	#include "xlat/madvise_cmds.h"

	SYS_FUNC(madvise)
	{
	printaddr(tcp->u_arg[0]);
	tprintf(", %lu, ", tcp->u_arg[1]);
	printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");

	return RVAL_DECODED;
	}

	#include "xlat/mlockall_flags.h"

	SYS_FUNC(mlockall)
	{
	printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");

	return RVAL_DECODED;
	}

	#include "xlat/mctl_sync.h"

	SYS_FUNC(msync)
	{
	/* addr */
	printaddr(tcp->u_arg[0]);
	/* len */
	tprintf(", %lu, ", tcp->u_arg[1]);
	/* flags */
	printflags(mctl_sync, tcp->u_arg[2], "MS_???");

	return RVAL_DECODED;
	}

	SYS_FUNC(mincore)
	{
	if (entering(tcp)) {
	printaddr(tcp->u_arg[0]);
	tprintf(", %lu, ", tcp->u_arg[1]);
	} else {
	unsigned long i, len;
	char *vec = NULL;

	len = tcp->u_arg[1];
	if (syserror(tcp) \|\| !verbose(tcp) \|\|
	!tcp->u_arg[2] \|\| !(vec = malloc(len)) \|\|
	umoven(tcp, tcp->u_arg[2], len, vec) < 0)
	printaddr(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)
	SYS_FUNC(getpagesize)
	{
	if (exiting(tcp))
	return RVAL_HEX;
	return 0;
	}
	#endif

	SYS_FUNC(remap_file_pages)
	{
	printaddr(tcp->u_arg[0]);
	tprintf(", %lu, ", 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 RVAL_DECODED;
	}

	#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)

	#include "xlat/policies.h"
	#include "xlat/mbindflags.h"
	#include "xlat/mempolicyflags.h"
	#include "xlat/move_pages_flags.h"

	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), &n) < 0) {
	tprints("?");
	failed = 1;
	break;
	}
	tprintf("%#0lx", (int) sizeof(long) 2 + 2, n);
	}
	tprints("}");
	if (failed) {
	tprints(" ");
	printaddr(ptr);
	}
	} else {
	tprints(" ");
	printaddr(ptr);
	}
	tprintf(", %lu", maxnodes);
	}

	SYS_FUNC(mbind)
	{
	printaddr(tcp->u_arg[0]);
	tprintf(", %lu, ", 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 RVAL_DECODED;
	}

	SYS_FUNC(set_mempolicy)
	{
	printxval(policies, tcp->u_arg[0], "MPOL_???");
	get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], 0);

	return RVAL_DECODED;
	}

	SYS_FUNC(get_mempolicy)
	{
	if (exiting(tcp)) {
	int pol;
	if (!umove_or_printaddr(tcp, tcp->u_arg[0], &pol))
	printxval(policies, pol, "MPOL_???");
	get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], syserror(tcp));
	tprints(", ");
	printaddr(tcp->u_arg[3]);
	tprints(", ");
	printflags(mempolicyflags, tcp->u_arg[4], "MPOL_???");
	}
	return 0;
	}

	SYS_FUNC(migrate_pages)
	{
	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 RVAL_DECODED;
	}

	SYS_FUNC(move_pages)
	{
	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 {
	unsigned 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 {
	unsigned 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("}, ");
	}
	} else {
	unsigned long npages = tcp->u_arg[1];
	if (tcp->u_arg[4] == 0)
	tprints("NULL, ");
	else {
	unsigned 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)
	SYS_FUNC(subpage_prot)
	{
	unsigned long cur, end, abbrev_end, entries;
	unsigned int entry;

	printaddr(tcp->u_arg[0]);
	tprints(", ");
	printaddr(tcp->u_arg[1]);
	tprints(", ");
	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 < (unsigned long) tcp->u_arg[2]) {
	printaddr(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 > (unsigned long) 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 RVAL_DECODED;
	}
	#endif