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>
38 #include "xlat/prctl_options.h"
39 #include "xlat/pr_cap_ambient.h"
40 #include "xlat/pr_dumpable.h"
41 #include "xlat/pr_fp_mode.h"
42 #include "xlat/pr_mce_kill.h"
43 #include "xlat/pr_mce_kill_policy.h"
44 #include "xlat/pr_set_mm.h"
45 #include "xlat/pr_sve_vl_flags.h"
46 #include "xlat/pr_tsc.h"
47 #include "xlat/pr_unalign_flags.h"
50 # define TASK_COMM_LEN 16
53 #ifdef HAVE_LINUX_SECCOMP_H
54 # include <linux/seccomp.h>
56 #include "xlat/seccomp_mode.h"
58 #ifdef HAVE_LINUX_SECUREBITS_H
59 # include <linux/securebits.h>
61 #include "xlat/secbits.h"
63 /* these constants are the same as in <linux/capability.h> */
71 #ifndef PR_SVE_VL_LEN_MASK
72 # define PR_SVE_VL_LEN_MASK 0xffff
77 print_prctl_args(struct tcb *tcp, const unsigned int first)
81 for (i = first; i < tcp->s_ent->nargs; ++i)
82 tprintf(", %#" PRI_klx, tcp->u_arg[i]);
86 sprint_sve_val(kernel_ulong_t arg)
88 static char out[sizeof("PR_SVE_SET_VL_ONEXEC|PR_SVE_VL_INHERIT|0x") +
89 sizeof(kernel_ulong_t) * 2];
91 kernel_ulong_t vl = arg & PR_SVE_VL_LEN_MASK;
92 kernel_ulong_t flags = arg & ~PR_SVE_VL_LEN_MASK;
93 const char *flags_str = sprintflags("", pr_sve_vl_flags, flags);
95 xsprintf(out, "%s%s%#" PRI_klx,
96 flags_str ?: "", flags_str ? "|" : "", vl);
103 const unsigned int option = tcp->u_arg[0];
104 const kernel_ulong_t arg2 = tcp->u_arg[1];
105 const kernel_ulong_t arg3 = tcp->u_arg[2];
107 * PR_SET_VMA is the only command which actually uses these arguments
108 * currently, and it is available only on Android for now.
111 const kernel_ulong_t arg4 = tcp->u_arg[3];
112 const kernel_ulong_t arg5 = tcp->u_arg[4];
117 printxval(prctl_options, option, "PR_???");
120 case PR_GET_KEEPCAPS:
122 case PR_GET_TIMERSLACK:
126 case PR_GET_CHILD_SUBREAPER:
133 printnum_int(tcp, arg2, "%u");
136 case PR_GET_DUMPABLE:
141 tcp->auxstr = xlookup(pr_dumpable, (kernel_ulong_t) tcp->u_rval);
151 printstr_ex(tcp, arg2, TASK_COMM_LEN,
156 case PR_GET_PDEATHSIG:
159 } else if (!umove_or_printaddr(tcp, arg2, &i)) {
166 case PR_GET_SECUREBITS:
169 if (syserror(tcp) || tcp->u_rval == 0)
171 tcp->auxstr = sprintflags("", secbits,
172 (kernel_ulong_t) tcp->u_rval);
175 case PR_GET_TID_ADDRESS:
179 printnum_kptr(tcp, arg2);
185 } else if (!umove_or_printaddr(tcp, arg2, &i)) {
187 printxval(pr_tsc, i, "PR_TSC_???");
195 } else if (!umove_or_printaddr(tcp, arg2, &i)) {
197 printflags(pr_unalign_flags, i, "PR_UNALIGN_???");
205 if (syserror(tcp) || tcp->u_rval == 0)
207 tcp->auxstr = sprintflags("", pr_fp_mode,
208 (kernel_ulong_t) tcp->u_rval);
213 tprintf(", %s", sprint_sve_val(arg2));
216 ATTRIBUTE_FALLTHROUGH;
221 if (syserror(tcp) || tcp->u_rval == 0)
224 tcp->auxstr = sprint_sve_val(tcp->u_rval);
228 /* PR_TASK_PERF_EVENTS_* take no arguments. */
229 case PR_TASK_PERF_EVENTS_DISABLE:
230 case PR_TASK_PERF_EVENTS_ENABLE:
233 case PR_SET_CHILD_SUBREAPER:
237 case PR_SET_KEEPCAPS:
239 tprintf(", %" PRI_klu, arg2);
242 case PR_SET_DUMPABLE:
244 printxval64(pr_dumpable, arg2, "SUID_DUMP_???");
247 case PR_CAPBSET_DROP:
248 case PR_CAPBSET_READ:
250 printxval64(cap, arg2, "CAP_???");
255 printxval64(pr_cap_ambient, arg2,
256 "PR_CAP_AMBIENT_???");
258 case PR_CAP_AMBIENT_RAISE:
259 case PR_CAP_AMBIENT_LOWER:
260 case PR_CAP_AMBIENT_IS_SET:
262 printxval64(cap, arg3, "CAP_???");
263 print_prctl_args(tcp, 3);
266 print_prctl_args(tcp, 2);
273 printxval64(pr_mce_kill, arg2, "PR_MCE_KILL_???");
275 if (PR_MCE_KILL_SET == arg2)
276 printxval64(pr_mce_kill_policy, arg3,
279 tprintf("%#" PRI_klx, arg3);
280 print_prctl_args(tcp, 3);
285 printstr_ex(tcp, arg2, TASK_COMM_LEN - 1,
290 # ifndef PR_SET_VMA_ANON_NAME
291 # define PR_SET_VMA_ANON_NAME 0
294 if (arg2 == PR_SET_VMA_ANON_NAME) {
295 tprintf(", PR_SET_VMA_ANON_NAME, %#" PRI_klx, arg3);
296 tprintf(", %" PRI_klu ", ", arg4);
299 /* There are no other sub-options now, but there
300 * might be in future... */
301 print_prctl_args(tcp, 1);
308 printxval(pr_set_mm, arg2, "PR_SET_MM_???");
309 print_prctl_args(tcp, 2);
312 case PR_SET_PDEATHSIG:
315 tprintf("%" PRI_klu, arg2);
317 tprints(signame(arg2));
322 if ((int) arg2 == -1)
323 tprints("PR_SET_PTRACER_ANY");
325 tprintf("%" PRI_klu, arg2);
330 printxval64(seccomp_mode, arg2,
332 if (SECCOMP_MODE_STRICT == arg2)
334 if (SECCOMP_MODE_FILTER == arg2) {
336 decode_seccomp_fprog(tcp, arg3);
339 print_prctl_args(tcp, 2);
342 case PR_SET_SECUREBITS:
344 printflags64(secbits, arg2, "SECBIT_???");
347 case PR_SET_TIMERSLACK:
348 tprintf(", %" PRI_kld, arg2);
353 printxval(pr_tsc, arg2, "PR_TSC_???");
358 printflags(pr_unalign_flags, arg2, "PR_UNALIGN_???");
361 case PR_SET_NO_NEW_PRIVS:
362 case PR_SET_THP_DISABLE:
363 tprintf(", %" PRI_klu, arg2);
364 print_prctl_args(tcp, 2);
367 case PR_MCE_KILL_GET:
369 print_prctl_args(tcp, 1);
374 tcp->auxstr = xlookup(pr_mce_kill_policy,
375 (kernel_ulong_t) tcp->u_rval);
376 return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL;
380 printflags(pr_fp_mode, arg2, "PR_FP_MODE_???");
383 case PR_GET_NO_NEW_PRIVS:
384 case PR_GET_THP_DISABLE:
385 case PR_MPX_DISABLE_MANAGEMENT:
386 case PR_MPX_ENABLE_MANAGEMENT:
388 print_prctl_args(tcp, 1);
394 #if defined X86_64 || defined X32 || defined I386
395 # include "xlat/archvals.h"
399 const unsigned int option = tcp->u_arg[0];
400 const kernel_ulong_t addr = tcp->u_arg[1];
403 printxval(archvals, option, "ARCH_???");
411 printnum_ptr(tcp, addr);
415 tprintf(", %#" PRI_klx, addr);
418 #endif /* X86_64 || X32 || I386 */