2 * Copyright (c) 1994-1996 Rick Sladkey <jrs@world.std.com>
3 * Copyright (c) 1996-2000 Wichert Akkerman <wichert@cistron.nl>
4 * Copyright (c) 2005-2007 Roland McGrath <roland@redhat.com>
5 * Copyright (c) 2008-2015 Dmitry V. Levin <ldv@altlinux.org>
6 * Copyright (c) 2014-2017 The strace developers.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <linux/prctl.h>
36 #include "xlat/prctl_options.h"
37 #include "xlat/pr_cap_ambient.h"
38 #include "xlat/pr_dumpable.h"
39 #include "xlat/pr_fp_mode.h"
40 #include "xlat/pr_mce_kill.h"
41 #include "xlat/pr_mce_kill_policy.h"
42 #include "xlat/pr_set_mm.h"
43 #include "xlat/pr_tsc.h"
44 #include "xlat/pr_unalign_flags.h"
47 # define TASK_COMM_LEN 16
50 #ifdef HAVE_LINUX_SECCOMP_H
51 # include <linux/seccomp.h>
53 #include "xlat/seccomp_mode.h"
55 #ifdef HAVE_LINUX_SECUREBITS_H
56 # include <linux/securebits.h>
58 #include "xlat/secbits.h"
60 /* these constants are the same as in <linux/capability.h> */
69 print_prctl_args(struct tcb *tcp, const unsigned int first)
73 for (i = first; i < tcp->s_ent->nargs; ++i)
74 tprintf(", %#" PRI_klx, tcp->u_arg[i]);
79 const unsigned int option = tcp->u_arg[0];
80 const kernel_ulong_t arg2 = tcp->u_arg[1];
81 const kernel_ulong_t arg3 = tcp->u_arg[2];
83 * PR_SET_VMA is the only command which actually uses these arguments
84 * currently, and it is available only on Android for now.
87 const kernel_ulong_t arg4 = tcp->u_arg[3];
88 const kernel_ulong_t arg5 = tcp->u_arg[4];
93 printxval(prctl_options, option, "PR_???");
98 case PR_GET_TIMERSLACK:
102 case PR_GET_CHILD_SUBREAPER:
109 printnum_int(tcp, arg2, "%u");
112 case PR_GET_DUMPABLE:
117 tcp->auxstr = xlookup(pr_dumpable, (kernel_ulong_t) tcp->u_rval);
127 printstr_ex(tcp, arg2, TASK_COMM_LEN,
132 case PR_GET_PDEATHSIG:
135 } else if (!umove_or_printaddr(tcp, arg2, &i)) {
142 case PR_GET_SECUREBITS:
145 if (syserror(tcp) || tcp->u_rval == 0)
147 tcp->auxstr = sprintflags("", secbits,
148 (kernel_ulong_t) tcp->u_rval);
151 case PR_GET_TID_ADDRESS:
155 printnum_kptr(tcp, arg2);
161 } else if (!umove_or_printaddr(tcp, arg2, &i)) {
163 printxval(pr_tsc, i, "PR_TSC_???");
171 } else if (!umove_or_printaddr(tcp, arg2, &i)) {
173 printflags(pr_unalign_flags, i, "PR_UNALIGN_???");
181 if (syserror(tcp) || tcp->u_rval == 0)
183 tcp->auxstr = sprintflags("", pr_fp_mode,
184 (kernel_ulong_t) tcp->u_rval);
187 /* PR_TASK_PERF_EVENTS_* take no arguments. */
188 case PR_TASK_PERF_EVENTS_DISABLE:
189 case PR_TASK_PERF_EVENTS_ENABLE:
192 case PR_SET_CHILD_SUBREAPER:
196 case PR_SET_KEEPCAPS:
198 tprintf(", %" PRI_klu, arg2);
201 case PR_SET_DUMPABLE:
203 printxval64(pr_dumpable, arg2, "SUID_DUMP_???");
206 case PR_CAPBSET_DROP:
207 case PR_CAPBSET_READ:
209 printxval64(cap, arg2, "CAP_???");
214 printxval64(pr_cap_ambient, arg2,
215 "PR_CAP_AMBIENT_???");
217 case PR_CAP_AMBIENT_RAISE:
218 case PR_CAP_AMBIENT_LOWER:
219 case PR_CAP_AMBIENT_IS_SET:
221 printxval64(cap, arg3, "CAP_???");
222 print_prctl_args(tcp, 3);
225 print_prctl_args(tcp, 2);
232 printxval64(pr_mce_kill, arg2, "PR_MCE_KILL_???");
234 if (PR_MCE_KILL_SET == arg2)
235 printxval64(pr_mce_kill_policy, arg3,
238 tprintf("%#" PRI_klx, arg3);
239 print_prctl_args(tcp, 3);
244 printstr_ex(tcp, arg2, TASK_COMM_LEN - 1,
249 # ifndef PR_SET_VMA_ANON_NAME
250 # define PR_SET_VMA_ANON_NAME 0
253 if (arg2 == PR_SET_VMA_ANON_NAME) {
254 tprintf(", PR_SET_VMA_ANON_NAME, %#" PRI_klx, arg3);
255 tprintf(", %" PRI_klu ", ", arg4);
258 /* There are no other sub-options now, but there
259 * might be in future... */
260 print_prctl_args(tcp, 1);
267 printxval(pr_set_mm, arg2, "PR_SET_MM_???");
268 print_prctl_args(tcp, 2);
271 case PR_SET_PDEATHSIG:
274 tprintf("%" PRI_klu, arg2);
276 tprints(signame(arg2));
281 if ((int) arg2 == -1)
282 tprints("PR_SET_PTRACER_ANY");
284 tprintf("%" PRI_klu, arg2);
289 printxval64(seccomp_mode, arg2,
291 if (SECCOMP_MODE_STRICT == arg2)
293 if (SECCOMP_MODE_FILTER == arg2) {
295 decode_seccomp_fprog(tcp, arg3);
298 print_prctl_args(tcp, 2);
301 case PR_SET_SECUREBITS:
303 printflags64(secbits, arg2, "SECBIT_???");
306 case PR_SET_TIMERSLACK:
307 tprintf(", %" PRI_kld, arg2);
312 printxval(pr_tsc, arg2, "PR_TSC_???");
317 printflags(pr_unalign_flags, arg2, "PR_UNALIGN_???");
320 case PR_SET_NO_NEW_PRIVS:
321 case PR_SET_THP_DISABLE:
322 tprintf(", %" PRI_klu, arg2);
323 print_prctl_args(tcp, 2);
326 case PR_MCE_KILL_GET:
328 print_prctl_args(tcp, 1);
333 tcp->auxstr = xlookup(pr_mce_kill_policy,
334 (kernel_ulong_t) tcp->u_rval);
335 return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL;
339 printflags(pr_fp_mode, arg2, "PR_FP_MODE_???");
342 case PR_GET_NO_NEW_PRIVS:
343 case PR_GET_THP_DISABLE:
344 case PR_MPX_DISABLE_MANAGEMENT:
345 case PR_MPX_ENABLE_MANAGEMENT:
347 print_prctl_args(tcp, 1);
353 #if defined X86_64 || defined X32 || defined I386
354 # include "xlat/archvals.h"
358 const unsigned int option = tcp->u_arg[0];
359 const kernel_ulong_t addr = tcp->u_arg[1];
362 printxval(archvals, option, "ARCH_???");
370 printnum_ptr(tcp, addr);
374 tprintf(", %#" PRI_klx, addr);
377 #endif /* X86_64 || X32 || I386 */