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linux32_misc.c revision 1.11 
      1 /*	$NetBSD: linux32_misc.c,v 1.11 2008/06/16 19:57:43 christos 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 1.11 2008/06/16 19:57:43 christos Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <sys/proc.h>
     39 #include <sys/time.h>
     40 #include <sys/types.h>
     41 #include <sys/malloc.h>
     42 #include <sys/fstypes.h>
     43 #include <sys/vfs_syscalls.h>
     44 #include <sys/ptrace.h>
     45 
     46 #include <compat/netbsd32/netbsd32.h>
     47 #include <compat/netbsd32/netbsd32_syscallargs.h>
     48 
     49 #include <compat/linux32/common/linux32_types.h>
     50 #include <compat/linux32/common/linux32_signal.h>
     51 #include <compat/linux32/linux32_syscallargs.h>
     52 
     53 #include <compat/linux/common/linux_ptrace.h>
     54 #include <compat/linux/common/linux_types.h>
     55 #include <compat/linux/common/linux_signal.h>
     56 #include <compat/linux/common/linux_misc.h>
     57 #include <compat/linux/common/linux_statfs.h>
     58 #include <compat/linux/linux_syscallargs.h>
     59 
     60 extern const struct linux_mnttypes linux_fstypes[];
     61 extern const int linux_fstypes_cnt;
     62 
     63 
     64 /*
     65  * Implement the fs stat functions. Straightforward.
     66  */
     67 int
     68 linux32_sys_statfs(struct lwp *l, const struct linux32_sys_statfs_args *uap, register_t *retval)
     69 {
     70 	/* {
     71 		syscallarg(const netbsd32_charp char) path;
     72 		syscallarg(linux32_statfsp) sp;
     73 	} */
     74 	struct statvfs *sb;
     75 	struct linux_statfs ltmp;
     76 	int error;
     77 
     78 	sb = STATVFSBUF_GET();
     79 	error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb);
     80 	if (error == 0) {
     81 		bsd_to_linux_statfs(sb, &ltmp);
     82 		error = copyout(&ltmp, SCARG_P32(uap, sp), sizeof ltmp);
     83 	}
     84 
     85 	STATVFSBUF_PUT(sb);
     86 	return error;
     87 }
     88 extern const int linux_ptrace_request_map[];
     89 int
     90 linux32_sys_ptrace(struct lwp *l, const struct linux32_sys_ptrace_args *uap, register_t *retval)
     91 {
     92 	/* {
     93 		i386, m68k, powerpc: T=int
     94 		alpha, amd64: T=long
     95 		syscallarg(T) request;
     96 		syscallarg(T) pid;
     97 		syscallarg(T) addr;
     98 		syscallarg(T) data;
     99 	} */
    100 #if defined(PTRACE) || defined(_LKM)
    101 	const int *ptr;
    102 	int request;
    103 	int error;
    104 
    105 	ptr = linux_ptrace_request_map;
    106 	request = SCARG(uap, request);
    107 	while (*ptr != -1)
    108 		if (*ptr++ == request) {
    109 			struct netbsd32_ptrace_args pta;
    110 
    111 			SCARG(&pta, req) = *ptr;
    112 			SCARG(&pta, pid) = SCARG(uap, pid);
    113 			SCARG(&pta, addr) = (void *)SCARG(uap, addr);
    114 			SCARG(&pta, data) = SCARG(uap, data);
    115 
    116 			/*
    117 			 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually
    118 			 * to continue where the process left off previously.
    119 			 * The same thing is achieved by addr == (void *) 1
    120 			 * on NetBSD, so rewrite 'addr' appropriately.
    121 			 */
    122 			if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0)
    123 				SCARG(&pta, addr) = (void *) 1;
    124 
    125 			error = netbsd32_ptrace(l, &pta, retval);
    126 			if (error)
    127 				return error;
    128 			switch (request) {
    129 			case LINUX_PTRACE_PEEKTEXT:
    130 			case LINUX_PTRACE_PEEKDATA:
    131 				error = copyout (retval,
    132 				    (void *)SCARG(uap, data),
    133 				    sizeof *retval);
    134 				*retval = SCARG(uap, data);
    135 				break;
    136 			default:
    137 				break;
    138 			}
    139 			return error;
    140 		}
    141 		else
    142 			ptr++;
    143 
    144 #if 0
    145 	return LINUX_SYS_PTRACE_ARCH(l, uap, retval);
    146 #endif
    147 #else
    148 	return ENOSYS;
    149 #endif /* PTRACE || _LKM */
    150 }
    151