granicus.if.org Git - strace/blob - process.c

   1 /*
   2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   6  * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
   7  *                     Linux for s390 port by D.J. Barrow
   8  *                    <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
   9  * Copyright (c) 2000 PocketPenguins Inc.  Linux for Hitachi SuperH
  10  *                    port by Greg Banks <gbanks@pocketpenguins.com>
  11  *
  12  * All rights reserved.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  * 3. The name of the author may not be used to endorse or promote products
  23  *    derived from this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  26  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  28  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  29  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  34  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #include "defs.h"
  38
  39 #ifdef HAVE_ELF_H
  40 # include <elf.h>
  41 #endif
  42
  43 #include "xlat/nt_descriptor_types.h"
  44
  45 #include "regs.h"
  46 #include "ptrace.h"
  47 #include "xlat/ptrace_cmds.h"
  48 #include "xlat/ptrace_setoptions_flags.h"
  49
  50 #define uoff(member)    offsetof(struct user, member)
  51 #define XLAT_UOFF(member)       { uoff(member), "offsetof(struct user, " #member ")" }
  52
  53 static const struct xlat struct_user_offsets[] = {
  54 #include "userent.h"
  55         XLAT_END
  56 };
  57
  58 int
  59 sys_ptrace(struct tcb *tcp)
  60 {
  61         const struct xlat *x;
  62         unsigned long addr;
  63
  64         if (entering(tcp)) {
  65                 printxval(ptrace_cmds, tcp->u_arg[0], "PTRACE_???");
  66                 tprintf(", %lu, ", tcp->u_arg[1]);
  67
  68                 addr = tcp->u_arg[2];
  69                 if (tcp->u_arg[0] == PTRACE_PEEKUSER
  70                  || tcp->u_arg[0] == PTRACE_POKEUSER
  71                 ) {
  72                         for (x = struct_user_offsets; x->str; x++) {
  73                                 if (x->val >= addr)
  74                                         break;
  75                         }
  76                         if (!x->str)
  77                                 tprintf("%#lx, ", addr);
  78                         else if (x->val > addr && x != struct_user_offsets) {
  79                                 x--;
  80                                 tprintf("%s + %ld, ", x->str, addr - x->val);
  81                         }
  82                         else
  83                                 tprintf("%s, ", x->str);
  84                 } else
  85                 if (tcp->u_arg[0] == PTRACE_GETREGSET
  86                  || tcp->u_arg[0] == PTRACE_SETREGSET
  87                 ) {
  88                         printxval(nt_descriptor_types, tcp->u_arg[2], "NT_???");
  89                         tprints(", ");
  90                 } else
  91                         tprintf("%#lx, ", addr);
  92
  93
  94                 switch (tcp->u_arg[0]) {
  95 #ifndef IA64
  96                 case PTRACE_PEEKDATA:
  97                 case PTRACE_PEEKTEXT:
  98                 case PTRACE_PEEKUSER:
  99                         break;
 100 #endif
 101                 case PTRACE_CONT:
 102                 case PTRACE_SINGLESTEP:
 103                 case PTRACE_SYSCALL:
 104                 case PTRACE_DETACH:
 105                         printsignal(tcp->u_arg[3]);
 106                         break;
 107                 case PTRACE_SETOPTIONS:
 108                         printflags(ptrace_setoptions_flags, tcp->u_arg[3], "PTRACE_O_???");
 109                         break;
 110                 case PTRACE_SETSIGINFO: {
 111                         printsiginfo_at(tcp, tcp->u_arg[3]);
 112                         break;
 113                 }
 114                 case PTRACE_SETREGSET:
 115                         tprint_iov(tcp, /*len:*/ 1, tcp->u_arg[3], /*as string:*/ 0);
 116                         break;
 117                 case PTRACE_GETSIGINFO:
 118                 case PTRACE_GETREGSET:
 119                         /* Don't print anything, do it at syscall return. */
 120                         break;
 121                 default:
 122                         tprintf("%#lx", tcp->u_arg[3]);
 123                         break;
 124                 }
 125         } else {
 126                 switch (tcp->u_arg[0]) {
 127                 case PTRACE_PEEKDATA:
 128                 case PTRACE_PEEKTEXT:
 129                 case PTRACE_PEEKUSER:
 130 #ifdef IA64
 131                         return RVAL_HEX;
 132 #else
 133                         printnum_long(tcp, tcp->u_arg[3], "%#lx");
 134                         break;
 135 #endif
 136                 case PTRACE_GETSIGINFO: {
 137                         printsiginfo_at(tcp, tcp->u_arg[3]);
 138                         break;
 139                 }
 140                 case PTRACE_GETREGSET:
 141                         tprint_iov(tcp, /*len:*/ 1, tcp->u_arg[3], /*as string:*/ 0);
 142                         break;
 143                 }
 144         }
 145         return 0;
 146 }