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linux32_misc.c revision 1.9.6.3 
      1 /*	$NetBSD: linux32_misc.c,v 1.9.6.3 2009/01/17 13:28:45 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 1.9.6.3 2009/01/17 13:28:45 mjf 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 #include <sys/syscall.h>
     46 
     47 #include <compat/netbsd32/netbsd32.h>
     48 #include <compat/netbsd32/netbsd32_syscallargs.h>
     49 
     50 #include <compat/linux32/common/linux32_types.h>
     51 #include <compat/linux32/common/linux32_signal.h>
     52 #include <compat/linux32/linux32_syscallargs.h>
     53 
     54 #include <compat/linux/common/linux_ptrace.h>
     55 #include <compat/linux/common/linux_types.h>
     56 #include <compat/linux/common/linux_signal.h>
     57 #include <compat/linux/common/linux_misc.h>
     58 #include <compat/linux/common/linux_statfs.h>
     59 #include <compat/linux/common/linux_ipc.h>
     60 #include <compat/linux/common/linux_sem.h>
     61 #include <compat/linux/linux_syscallargs.h>
     62 
     63 extern const struct linux_mnttypes linux_fstypes[];
     64 extern const int linux_fstypes_cnt;
     65 
     66 
     67 /*
     68  * Implement the fs stat functions. Straightforward.
     69  */
     70 int
     71 linux32_sys_statfs(struct lwp *l, const struct linux32_sys_statfs_args *uap, register_t *retval)
     72 {
     73 	/* {
     74 		syscallarg(const netbsd32_charp char) path;
     75 		syscallarg(linux32_statfsp) sp;
     76 	} */
     77 	struct statvfs *sb;
     78 	struct linux_statfs ltmp;
     79 	int error;
     80 
     81 	sb = STATVFSBUF_GET();
     82 	error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb);
     83 	if (error == 0) {
     84 		bsd_to_linux_statfs(sb, &ltmp);
     85 		error = copyout(&ltmp, SCARG_P32(uap, sp), sizeof ltmp);
     86 	}
     87 
     88 	STATVFSBUF_PUT(sb);
     89 	return error;
     90 }
     91 
     92 extern const int linux_ptrace_request_map[];
     93 
     94 int
     95 linux32_sys_ptrace(struct lwp *l, const struct linux32_sys_ptrace_args *uap, register_t *retval)
     96 {
     97 	/* {
     98 		i386, m68k, powerpc: T=int
     99 		alpha, amd64: T=long
    100 		syscallarg(T) request;
    101 		syscallarg(T) pid;
    102 		syscallarg(T) addr;
    103 		syscallarg(T) data;
    104 	} */
    105 	const int *ptr;
    106 	int request;
    107 	int error;
    108 
    109 	ptr = linux_ptrace_request_map;
    110 	request = SCARG(uap, request);
    111 	while (*ptr != -1)
    112 		if (*ptr++ == request) {
    113 			struct sys_ptrace_args pta;
    114 
    115 			SCARG(&pta, req) = *ptr;
    116 			SCARG(&pta, pid) = SCARG(uap, pid);
    117 			SCARG(&pta, addr) = NETBSD32IPTR64(SCARG(uap, addr));
    118 			SCARG(&pta, data) = SCARG(uap, data);
    119 
    120 			/*
    121 			 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually
    122 			 * to continue where the process left off previously.
    123 			 * The same thing is achieved by addr == (void *) 1
    124 			 * on NetBSD, so rewrite 'addr' appropriately.
    125 			 */
    126 			if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0)
    127 				SCARG(&pta, addr) = (void *) 1;
    128 
    129 			error = sysent[SYS_ptrace].sy_call(l, &pta, retval);
    130 			if (error)
    131 				return error;
    132 			switch (request) {
    133 			case LINUX_PTRACE_PEEKTEXT:
    134 			case LINUX_PTRACE_PEEKDATA:
    135 				error = copyout (retval,
    136 				    NETBSD32IPTR64(SCARG(uap, data)),
    137 				    sizeof *retval);
    138 				*retval = SCARG(uap, data);
    139 				break;
    140 			default:
    141 				break;
    142 			}
    143 			return error;
    144 		}
    145 		else
    146 			ptr++;
    147 
    148 	return EIO;
    149 }
    150