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Wichert Akkerman76baf7c1999-02-19 00:21:36 +00001/*
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>
Wichert Akkerman4dc8a2a1999-12-23 14:20:14 +00005 * 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>
Wichert Akkermanccef6372002-05-01 16:39:22 +00009 * Copyright (c) 2000 PocketPenguins Inc. Linux for Hitachi SuperH
10 * port by Greg Banks <gbanks@pocketpenguins.com>
Elliott Hughes39bac052017-05-25 16:56:11 -070011 * Copyright (c) 1999-2017 The strace developers.
Wichert Akkerman4dc8a2a1999-12-23 14:20:14 +000012 *
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000013 * All rights reserved.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. The name of the author may not be used to endorse or promote products
24 * derived from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000036 */
37
38#include "defs.h"
Dmitry V. Levin6eee4e02014-12-11 19:25:02 +000039
Dmitry V. Levinc41808b2013-03-18 00:52:29 +000040#ifdef HAVE_ELF_H
41# include <elf.h>
42#endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000043
Dmitry V. Levin6eee4e02014-12-11 19:25:02 +000044#include "xlat/nt_descriptor_types.h"
45
Dmitry V. Levin7211dbc2015-02-28 12:20:21 +000046#include "regs.h"
Dmitry V. Levinfadf3792015-02-13 00:26:38 +000047#include "ptrace.h"
Dmitry V. Levin6eee4e02014-12-11 19:25:02 +000048#include "xlat/ptrace_cmds.h"
49#include "xlat/ptrace_setoptions_flags.h"
Dmitry V. Levin809ee3e2016-05-12 15:45:24 +000050#include "xlat/ptrace_peeksiginfo_flags.h"
Dmitry V. Levin6eee4e02014-12-11 19:25:02 +000051
Denys Vlasenko513e9c22012-03-21 14:39:22 +010052#define uoff(member) offsetof(struct user, member)
Dmitry V. Levinc6ce4fd2014-12-11 19:25:02 +000053#define XLAT_UOFF(member) { uoff(member), "offsetof(struct user, " #member ")" }
Denys Vlasenko513e9c22012-03-21 14:39:22 +010054
Dmitry V. Levin8c0ef942014-12-11 19:25:02 +000055static const struct xlat struct_user_offsets[] = {
Dmitry V. Levinfced7b02014-12-11 19:25:02 +000056#include "userent.h"
Dmitry V. Levin59452732014-02-05 02:20:51 +000057 XLAT_END
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000058};
59
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +000060static void
Elliott Hughesd35df492017-02-15 15:19:05 -080061print_user_offset_addr(const kernel_ulong_t addr)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000062{
Roland McGrathd9f816f2004-09-04 03:39:20 +000063 const struct xlat *x;
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +000064
65 for (x = struct_user_offsets; x->str; ++x) {
66 if (x->val >= addr)
67 break;
68 }
69
70 if (!x->str) {
71 printaddr(addr);
72 } else if (x->val > addr) {
73 if (x == struct_user_offsets) {
74 printaddr(addr);
75 } else {
76 --x;
Elliott Hughesd35df492017-02-15 15:19:05 -080077 tprintf("%s + %" PRI_klu,
78 x->str, addr - (kernel_ulong_t) x->val);
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +000079 }
80 } else {
81 tprints(x->str);
82 }
83}
84
85SYS_FUNC(ptrace)
86{
Elliott Hughesd35df492017-02-15 15:19:05 -080087 const kernel_ulong_t request = tcp->u_arg[0];
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +000088 const int pid = tcp->u_arg[1];
Elliott Hughesd35df492017-02-15 15:19:05 -080089 const kernel_ulong_t addr = tcp->u_arg[2];
90 const kernel_ulong_t data = tcp->u_arg[3];
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000091
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000092 if (entering(tcp)) {
Dmitry V. Levin73a8e972016-05-12 14:45:38 +000093 /* request */
94 printxval64(ptrace_cmds, request, "PTRACE_???");
95
Dmitry V. Levin89ca4aa2016-05-12 15:03:58 +000096 if (request == PTRACE_TRACEME) {
97 /* pid, addr, and data are ignored. */
98 return RVAL_DECODED;
99 }
100
Dmitry V. Levin73a8e972016-05-12 14:45:38 +0000101 /* pid */
Dmitry V. Levin91bd1252016-05-12 15:10:41 +0000102 tprintf(", %d", pid);
Denys Vlasenkobe994972013-02-13 16:10:10 +0100103
Dmitry V. Levin73a8e972016-05-12 14:45:38 +0000104 /* addr */
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000105 switch (request) {
Dmitry V. Levin91bd1252016-05-12 15:10:41 +0000106 case PTRACE_ATTACH:
107 case PTRACE_INTERRUPT:
108 case PTRACE_KILL:
109 case PTRACE_LISTEN:
110 /* addr and data are ignored */
111 return RVAL_DECODED;
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000112 case PTRACE_PEEKUSER:
113 case PTRACE_POKEUSER:
Dmitry V. Levin91bd1252016-05-12 15:10:41 +0000114 tprints(", ");
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000115 print_user_offset_addr(addr);
116 break;
117 case PTRACE_GETREGSET:
118 case PTRACE_SETREGSET:
Dmitry V. Levin91bd1252016-05-12 15:10:41 +0000119 tprints(", ");
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000120 printxval(nt_descriptor_types, addr, "NT_???");
121 break;
Dmitry V. Levin3a5cd342016-05-12 15:38:35 +0000122 case PTRACE_GETSIGMASK:
123 case PTRACE_SETSIGMASK:
124 case PTRACE_SECCOMP_GET_FILTER:
Elliott Hughesd35df492017-02-15 15:19:05 -0800125 tprintf(", %" PRI_klu, addr);
Dmitry V. Levin3a5cd342016-05-12 15:38:35 +0000126 break;
Dmitry V. Levin809ee3e2016-05-12 15:45:24 +0000127 case PTRACE_PEEKSIGINFO: {
128 tprints(", ");
129 struct {
130 uint64_t off;
131 uint32_t flags;
132 uint32_t nr;
133 } psi;
134 if (umove_or_printaddr(tcp, addr, &psi)) {
135 tprints(", ");
136 printaddr(data);
137 return RVAL_DECODED;
138 }
139 tprintf("{off=%" PRIu64 ", flags=", psi.off);
140 printflags(ptrace_peeksiginfo_flags, psi.flags,
141 "PTRACE_PEEKSIGINFO_???");
142 tprintf(", nr=%u}", psi.nr);
143 break;
144 }
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000145 default:
Dmitry V. Levin91bd1252016-05-12 15:10:41 +0000146 tprints(", ");
Dmitry V. Levin14446eb2015-07-17 21:12:05 +0000147 printaddr(addr);
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000148 }
149
Dmitry V. Levin8bd7f312016-05-12 16:49:34 +0000150# if defined IA64 || defined SPARC || defined SPARC64
151 switch (request) {
152# ifdef IA64
153 case PTRACE_PEEKDATA:
154 case PTRACE_PEEKTEXT:
155 case PTRACE_PEEKUSER:
156 /* data is ignored */
157 return RVAL_DECODED | RVAL_HEX;
158# endif /* IA64 */
159# if defined SPARC || defined SPARC64
160 case PTRACE_GETREGS:
161 case PTRACE_SETREGS:
162 case PTRACE_GETFPREGS:
163 case PTRACE_SETFPREGS:
164 /* data is ignored */
165 return RVAL_DECODED;
166# endif /* SPARC || SPARC64 */
167 }
168# endif /* IA64 || SPARC || SPARC64 */
169
Dmitry V. Levin14446eb2015-07-17 21:12:05 +0000170 tprints(", ");
Denys Vlasenkobe994972013-02-13 16:10:10 +0100171
Dmitry V. Levin91bd1252016-05-12 15:10:41 +0000172 /* data */
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000173 switch (request) {
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000174 case PTRACE_CONT:
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000175 case PTRACE_DETACH:
Dmitry V. Levincaa2bc32016-05-12 15:50:43 +0000176 case PTRACE_SYSCALL:
177#ifdef PTRACE_SINGLESTEP
178 case PTRACE_SINGLESTEP:
179#endif
180#ifdef PTRACE_SINGLEBLOCK
181 case PTRACE_SINGLEBLOCK:
182#endif
183#ifdef PTRACE_SYSEMU
184 case PTRACE_SYSEMU:
185#endif
186#ifdef PTRACE_SYSEMU_SINGLESTEP
187 case PTRACE_SYSEMU_SINGLESTEP:
188#endif
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000189 printsignal(data);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000190 break;
Dmitry V. Levin7c8e3302016-05-12 15:53:28 +0000191 case PTRACE_SEIZE:
Denys Vlasenkof535b542009-01-13 18:30:55 +0000192 case PTRACE_SETOPTIONS:
Dmitry V. Levin7c8e3302016-05-12 15:53:28 +0000193#ifdef PTRACE_OLDSETOPTIONS
194 case PTRACE_OLDSETOPTIONS:
195#endif
Dmitry V. Levin388aca62016-05-12 16:35:54 +0000196 printflags64(ptrace_setoptions_flags, data, "PTRACE_O_???");
Denys Vlasenkof535b542009-01-13 18:30:55 +0000197 break;
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000198 case PTRACE_SETSIGINFO:
199 printsiginfo_at(tcp, data);
Denys Vlasenkof535b542009-01-13 18:30:55 +0000200 break;
Dmitry V. Levin1634de72016-05-12 16:52:49 +0000201 case PTRACE_SETSIGMASK:
202 print_sigset_addr_len(tcp, data, addr);
203 break;
Denys Vlasenkobe994972013-02-13 16:10:10 +0100204 case PTRACE_SETREGSET:
Fabien Siron2a54d8b2016-06-22 13:27:03 +0000205 tprint_iov(tcp, /*len:*/ 1, data, IOV_DECODE_ADDR);
Denys Vlasenkobe994972013-02-13 16:10:10 +0100206 break;
Dmitry V. Levin8bd7f312016-05-12 16:49:34 +0000207#ifndef IA64
208 case PTRACE_PEEKDATA:
209 case PTRACE_PEEKTEXT:
210 case PTRACE_PEEKUSER:
211#endif
Dmitry V. Levin846f6172016-05-12 16:56:30 +0000212 case PTRACE_GETEVENTMSG:
Dmitry V. Levinfadf3792015-02-13 00:26:38 +0000213 case PTRACE_GETREGSET:
Dmitry V. Levin8bd7f312016-05-12 16:49:34 +0000214 case PTRACE_GETSIGINFO:
Dmitry V. Levin1634de72016-05-12 16:52:49 +0000215 case PTRACE_GETSIGMASK:
Dmitry V. Levin76b4c332016-05-13 02:33:33 +0000216 case PTRACE_PEEKSIGINFO:
Dmitry V. Levind9fb4a42016-05-12 16:58:38 +0000217 case PTRACE_SECCOMP_GET_FILTER:
Dmitry V. Levin8bd7f312016-05-12 16:49:34 +0000218 if (verbose(tcp)) {
219 /* print data on exiting syscall */
220 return 0;
221 }
222 /* fall through */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000223 default:
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000224 printaddr(data);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000225 break;
226 }
Dmitry V. Levin8bd7f312016-05-12 16:49:34 +0000227
228 return RVAL_DECODED;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000229 } else {
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000230 switch (request) {
Dmitry V. Levin8bd7f312016-05-12 16:49:34 +0000231#ifndef IA64
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000232 case PTRACE_PEEKDATA:
233 case PTRACE_PEEKTEXT:
234 case PTRACE_PEEKUSER:
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000235 printnum_ptr(tcp, data);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000236 break;
Denys Vlasenko3e3490a2012-03-17 01:27:37 +0100237#endif
Dmitry V. Levin846f6172016-05-12 16:56:30 +0000238 case PTRACE_GETEVENTMSG:
239 printnum_ulong(tcp, data);
240 break;
241 case PTRACE_GETREGSET:
Fabien Siron2a54d8b2016-06-22 13:27:03 +0000242 tprint_iov(tcp, /*len:*/ 1, data, IOV_DECODE_ADDR);
Dmitry V. Levin846f6172016-05-12 16:56:30 +0000243 break;
Dmitry V. Levinccdc82a2016-04-01 00:28:33 +0000244 case PTRACE_GETSIGINFO:
245 printsiginfo_at(tcp, data);
Denys Vlasenkof535b542009-01-13 18:30:55 +0000246 break;
Dmitry V. Levin1634de72016-05-12 16:52:49 +0000247 case PTRACE_GETSIGMASK:
248 print_sigset_addr_len(tcp, data, addr);
249 break;
Dmitry V. Levin76b4c332016-05-13 02:33:33 +0000250 case PTRACE_PEEKSIGINFO:
Elliott Hughesd35df492017-02-15 15:19:05 -0800251 print_siginfo_array(tcp, data, tcp->u_rval);
Dmitry V. Levin76b4c332016-05-13 02:33:33 +0000252 break;
Dmitry V. Levind9fb4a42016-05-12 16:58:38 +0000253 case PTRACE_SECCOMP_GET_FILTER:
Elliott Hughesd35df492017-02-15 15:19:05 -0800254 print_seccomp_fprog(tcp, data, tcp->u_rval);
Dmitry V. Levind9fb4a42016-05-12 16:58:38 +0000255 break;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000256 }
257 }
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000258 return 0;
259}