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linux32_misc.c revision 1.9.6.2 
      1 /*	$NetBSD: linux32_misc.c,v 1.9.6.2 2008/06/29 09:33:03 mjf Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1995, 1998, 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe
      9  * of the Numerical Aerospace Simulation Facility, NASA Ames Research Center;
     10  * by Edgar Fu\ss, Mathematisches Institut der Uni Bonn.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: linux32_misc.c,v 1.9.6.2 2008/06/29 09:33:03 mjf Exp $");
     36 
     37 #if defined(_KERNEL_OPT)
     38 #include "opt_ptrace.h"
     39 #endif
     40 
     41 #include <sys/param.h>
     42 #include <sys/proc.h>
     43 #include <sys/time.h>
     44 #include <sys/types.h>
     45 #include <sys/malloc.h>
     46 #include <sys/fstypes.h>
     47 #include <sys/vfs_syscalls.h>
     48 #include <sys/ptrace.h>
     49 
     50 #include <compat/netbsd32/netbsd32.h>
     51 #include <compat/netbsd32/netbsd32_syscallargs.h>
     52 
     53 #include <compat/linux32/common/linux32_types.h>
     54 #include <compat/linux32/common/linux32_signal.h>
     55 #include <compat/linux32/linux32_syscallargs.h>
     56 
     57 #include <compat/linux/common/linux_ptrace.h>
     58 #include <compat/linux/common/linux_types.h>
     59 #include <compat/linux/common/linux_signal.h>
     60 #include <compat/linux/common/linux_misc.h>
     61 #include <compat/linux/common/linux_statfs.h>
     62 #include <compat/linux/linux_syscallargs.h>
     63 
     64 extern const struct linux_mnttypes linux_fstypes[];
     65 extern const int linux_fstypes_cnt;
     66 
     67 
     68 /*
     69  * Implement the fs stat functions. Straightforward.
     70  */
     71 int
     72 linux32_sys_statfs(struct lwp *l, const struct linux32_sys_statfs_args *uap, register_t *retval)
     73 {
     74 	/* {
     75 		syscallarg(const netbsd32_charp char) path;
     76 		syscallarg(linux32_statfsp) sp;
     77 	} */
     78 	struct statvfs *sb;
     79 	struct linux_statfs ltmp;
     80 	int error;
     81 
     82 	sb = STATVFSBUF_GET();
     83 	error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb);
     84 	if (error == 0) {
     85 		bsd_to_linux_statfs(sb, &ltmp);
     86 		error = copyout(&ltmp, SCARG_P32(uap, sp), sizeof ltmp);
     87 	}
     88 
     89 	STATVFSBUF_PUT(sb);
     90 	return error;
     91 }
     92 
     93 extern const int linux_ptrace_request_map[];
     94 
     95 int
     96 linux32_sys_ptrace(struct lwp *l, const struct linux32_sys_ptrace_args *uap, register_t *retval)
     97 {
     98 	/* {
     99 		i386, m68k, powerpc: T=int
    100 		alpha, amd64: T=long
    101 		syscallarg(T) request;
    102 		syscallarg(T) pid;
    103 		syscallarg(T) addr;
    104 		syscallarg(T) data;
    105 	} */
    106 #if defined(PTRACE) || defined(_LKM)
    107 	const int *ptr;
    108 	int request;
    109 	int error;
    110 
    111 	ptr = linux_ptrace_request_map;
    112 	request = SCARG(uap, request);
    113 	while (*ptr != -1)
    114 		if (*ptr++ == request) {
    115 			struct sys_ptrace_args pta;
    116 
    117 			SCARG(&pta, req) = *ptr;
    118 			SCARG(&pta, pid) = SCARG(uap, pid);
    119 			SCARG(&pta, addr) = NETBSD32IPTR64(SCARG(uap, addr));
    120 			SCARG(&pta, data) = SCARG(uap, data);
    121 
    122 			/*
    123 			 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually
    124 			 * to continue where the process left off previously.
    125 			 * The same thing is achieved by addr == (void *) 1
    126 			 * on NetBSD, so rewrite 'addr' appropriately.
    127 			 */
    128 			if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0)
    129 				SCARG(&pta, addr) = (void *) 1;
    130 
    131 			error = sys_ptrace(l, &pta, retval);
    132 			if (error)
    133 				return error;
    134 			switch (request) {
    135 			case LINUX_PTRACE_PEEKTEXT:
    136 			case LINUX_PTRACE_PEEKDATA:
    137 				error = copyout (retval,
    138 				    NETBSD32IPTR64(SCARG(uap, data)),
    139 				    sizeof *retval);
    140 				*retval = SCARG(uap, data);
    141 				break;
    142 			default:
    143 				break;
    144 			}
    145 			return error;
    146 		}
    147 		else
    148 			ptr++;
    149 
    150 	return EIO;
    151 #else
    152 	return ENOSYS;
    153 #endif /* PTRACE || _LKM */
    154 }
    155