+/*
+ * Copyright (c) 1994-1996 Rick Sladkey <jrs@world.std.com>
+ * Copyright (c) 1996-2000 Wichert Akkerman <wichert@cistron.nl>
+ * Copyright (c) 2005-2007 Roland McGrath <roland@redhat.com>
+ * Copyright (c) 2008-2015 Dmitry V. Levin <ldv@altlinux.org>
+ * Copyright (c) 2014-2017 The strace developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
#include "defs.h"
-#include <sys/prctl.h>
+#include <linux/prctl.h>
#include "xlat/prctl_options.h"
-#include "xlat/pr_unalign_flags.h"
+#include "xlat/pr_cap_ambient.h"
+#include "xlat/pr_dumpable.h"
+#include "xlat/pr_fp_mode.h"
#include "xlat/pr_mce_kill.h"
#include "xlat/pr_mce_kill_policy.h"
#include "xlat/pr_set_mm.h"
#include "xlat/pr_tsc.h"
+#include "xlat/pr_unalign_flags.h"
#ifndef TASK_COMM_LEN
# define TASK_COMM_LEN 16
#include "xlat/cap.h"
-static int
-prctl_enter(struct tcb *tcp)
+static void
+print_prctl_args(struct tcb *tcp, const unsigned int first)
+{
+ unsigned int i;
+
+ for (i = first; i < tcp->s_ent->nargs; ++i)
+ tprintf(", %#" PRI_klx, tcp->u_arg[i]);
+}
+
+SYS_FUNC(prctl)
{
+ const unsigned int option = tcp->u_arg[0];
+ const kernel_ulong_t arg2 = tcp->u_arg[1];
+ const kernel_ulong_t arg3 = tcp->u_arg[2];
+ /*
+ * PR_SET_VMA is the only command which actually uses these arguments
+ * currently, and it is available only on Android for now.
+ */
+#ifdef __ANDROID__
+ const kernel_ulong_t arg4 = tcp->u_arg[3];
+ const kernel_ulong_t arg5 = tcp->u_arg[4];
+#endif
unsigned int i;
- printxval(prctl_options, tcp->u_arg[0], "PR_???");
+ if (entering(tcp))
+ printxval(prctl_options, option, "PR_???");
+
+ switch (option) {
+ case PR_GET_KEEPCAPS:
+ case PR_GET_SECCOMP:
+ case PR_GET_TIMERSLACK:
+ case PR_GET_TIMING:
+ return RVAL_DECODED;
- switch (tcp->u_arg[0]) {
- /* PR_GET_* are decoded on exit. */
case PR_GET_CHILD_SUBREAPER:
- case PR_GET_DUMPABLE:
case PR_GET_ENDIAN:
case PR_GET_FPEMU:
case PR_GET_FPEXC:
- case PR_GET_KEEPCAPS:
+ if (entering(tcp))
+ tprints(", ");
+ else
+ printnum_int(tcp, arg2, "%u");
+ break;
+
+ case PR_GET_DUMPABLE:
+ if (entering(tcp))
+ break;
+ if (syserror(tcp))
+ return 0;
+ tcp->auxstr = xlookup(pr_dumpable, (kernel_ulong_t) tcp->u_rval);
+ return RVAL_STR;
+
case PR_GET_NAME:
+ if (entering(tcp)) {
+ tprints(", ");
+ } else {
+ if (syserror(tcp))
+ printaddr(arg2);
+ else
+ printstr_ex(tcp, arg2, TASK_COMM_LEN,
+ QUOTE_0_TERMINATED);
+ }
+ break;
+
case PR_GET_PDEATHSIG:
- case PR_GET_SECCOMP:
+ if (entering(tcp)) {
+ tprints(", ");
+ } else if (!umove_or_printaddr(tcp, arg2, &i)) {
+ tprints("[");
+ tprints(signame(i));
+ tprints("]");
+ }
+ break;
+
case PR_GET_SECUREBITS:
+ if (entering(tcp))
+ break;
+ if (syserror(tcp) || tcp->u_rval == 0)
+ return 0;
+ tcp->auxstr = sprintflags("", secbits,
+ (kernel_ulong_t) tcp->u_rval);
+ return RVAL_STR;
+
case PR_GET_TID_ADDRESS:
- case PR_GET_TIMERSLACK:
- case PR_GET_TIMING:
+ if (entering(tcp))
+ tprints(", ");
+ else
+ printnum_kptr(tcp, arg2);
+ break;
+
case PR_GET_TSC:
+ if (entering(tcp)) {
+ tprints(", ");
+ } else if (!umove_or_printaddr(tcp, arg2, &i)) {
+ tprints("[");
+ printxval(pr_tsc, i, "PR_TSC_???");
+ tprints("]");
+ }
+ break;
+
case PR_GET_UNALIGN:
- /* PR_TASK_PERF_EVENTS_* have nothing to decode on enter. */
+ if (entering(tcp)) {
+ tprints(", ");
+ } else if (!umove_or_printaddr(tcp, arg2, &i)) {
+ tprints("[");
+ printflags(pr_unalign_flags, i, "PR_UNALIGN_???");
+ tprints("]");
+ }
+ break;
+
+ case PR_GET_FP_MODE:
+ if (entering(tcp))
+ break;
+ if (syserror(tcp) || tcp->u_rval == 0)
+ return 0;
+ tcp->auxstr = sprintflags("", pr_fp_mode,
+ (kernel_ulong_t) tcp->u_rval);
+ return RVAL_STR;
+
+ /* PR_TASK_PERF_EVENTS_* take no arguments. */
case PR_TASK_PERF_EVENTS_DISABLE:
case PR_TASK_PERF_EVENTS_ENABLE:
- break;
+ return RVAL_DECODED;
case PR_SET_CHILD_SUBREAPER:
- case PR_SET_DUMPABLE:
case PR_SET_ENDIAN:
case PR_SET_FPEMU:
case PR_SET_FPEXC:
case PR_SET_KEEPCAPS:
case PR_SET_TIMING:
- tprintf(", %lu", tcp->u_arg[1]);
- break;
+ tprintf(", %" PRI_klu, arg2);
+ return RVAL_DECODED;
+
+ case PR_SET_DUMPABLE:
+ tprints(", ");
+ printxval64(pr_dumpable, arg2, "SUID_DUMP_???");
+ return RVAL_DECODED;
case PR_CAPBSET_DROP:
case PR_CAPBSET_READ:
tprints(", ");
- printxval(cap, tcp->u_arg[1], "CAP_???");
- break;
+ printxval64(cap, arg2, "CAP_???");
+ return RVAL_DECODED;
+
+ case PR_CAP_AMBIENT:
+ tprints(", ");
+ printxval64(pr_cap_ambient, arg2,
+ "PR_CAP_AMBIENT_???");
+ switch (arg2) {
+ case PR_CAP_AMBIENT_RAISE:
+ case PR_CAP_AMBIENT_LOWER:
+ case PR_CAP_AMBIENT_IS_SET:
+ tprints(", ");
+ printxval64(cap, arg3, "CAP_???");
+ print_prctl_args(tcp, 3);
+ break;
+ default:
+ print_prctl_args(tcp, 2);
+ break;
+ }
+ return RVAL_DECODED;
case PR_MCE_KILL:
tprints(", ");
- printxval(pr_mce_kill, tcp->u_arg[1], "PR_MCE_KILL_???");
+ printxval64(pr_mce_kill, arg2, "PR_MCE_KILL_???");
tprints(", ");
- if (PR_MCE_KILL_SET == tcp->u_arg[1])
- printxval(pr_mce_kill_policy, tcp->u_arg[2],
- "PR_MCE_KILL_???");
+ if (PR_MCE_KILL_SET == arg2)
+ printxval64(pr_mce_kill_policy, arg3,
+ "PR_MCE_KILL_???");
else
- tprintf("%#lx", tcp->u_arg[2]);
- for (i = 3; i < tcp->s_ent->nargs; i++)
- tprintf(", %#lx", tcp->u_arg[i]);
- break;
+ tprintf("%#" PRI_klx, arg3);
+ print_prctl_args(tcp, 3);
+ return RVAL_DECODED;
case PR_SET_NAME:
tprints(", ");
- printstr(tcp, tcp->u_arg[1], TASK_COMM_LEN);
- break;
+ printstr_ex(tcp, arg2, TASK_COMM_LEN - 1,
+ QUOTE_0_TERMINATED);
+ return RVAL_DECODED;
+
+#ifdef __ANDROID__
+# ifndef PR_SET_VMA_ANON_NAME
+# define PR_SET_VMA_ANON_NAME 0
+# endif
+ case PR_SET_VMA:
+ if (arg2 == PR_SET_VMA_ANON_NAME) {
+ tprintf(", PR_SET_VMA_ANON_NAME, %#" PRI_klx, arg3);
+ tprintf(", %" PRI_klu ", ", arg4);
+ printstr(tcp, arg5);
+ } else {
+ /* There are no other sub-options now, but there
+ * might be in future... */
+ print_prctl_args(tcp, 1);
+ }
+ return RVAL_DECODED;
+#endif
case PR_SET_MM:
tprints(", ");
- printxval(pr_set_mm, tcp->u_arg[1], "PR_SET_MM_???");
- for (i = 2; i < tcp->s_ent->nargs; i++)
- tprintf(", %#lx", tcp->u_arg[i]);
- break;
+ printxval(pr_set_mm, arg2, "PR_SET_MM_???");
+ print_prctl_args(tcp, 2);
+ return RVAL_DECODED;
case PR_SET_PDEATHSIG:
tprints(", ");
- if ((unsigned long) tcp->u_arg[1] > 128)
- tprintf("%lu", tcp->u_arg[1]);
+ if (arg2 > 128)
+ tprintf("%" PRI_klu, arg2);
else
- tprints(signame(tcp->u_arg[1]));
- break;
+ tprints(signame(arg2));
+ return RVAL_DECODED;
case PR_SET_PTRACER:
tprints(", ");
- if (tcp->u_arg[1] == -1)
+ if ((int) arg2 == -1)
tprints("PR_SET_PTRACER_ANY");
else
- tprintf("%lu", tcp->u_arg[1]);
- break;
+ tprintf("%" PRI_klu, arg2);
+ return RVAL_DECODED;
case PR_SET_SECCOMP:
tprints(", ");
- printxval(seccomp_mode, tcp->u_arg[1],
- "SECCOMP_MODE_???");
- if (SECCOMP_MODE_STRICT == tcp->u_arg[1])
- break;
- if (SECCOMP_MODE_FILTER == tcp->u_arg[1]) {
+ printxval64(seccomp_mode, arg2,
+ "SECCOMP_MODE_???");
+ if (SECCOMP_MODE_STRICT == arg2)
+ return RVAL_DECODED;
+ if (SECCOMP_MODE_FILTER == arg2) {
tprints(", ");
- print_seccomp_filter(tcp, tcp->u_arg[2]);
- break;
+ decode_seccomp_fprog(tcp, arg3);
+ return RVAL_DECODED;
}
- for (i = 2; i < tcp->s_ent->nargs; i++)
- tprintf(", %#lx", tcp->u_arg[i]);
- break;
+ print_prctl_args(tcp, 2);
+ return RVAL_DECODED;
case PR_SET_SECUREBITS:
tprints(", ");
- printflags(secbits, tcp->u_arg[1], "SECBIT_???");
- break;
+ printflags64(secbits, arg2, "SECBIT_???");
+ return RVAL_DECODED;
case PR_SET_TIMERSLACK:
- tprintf(", %ld", tcp->u_arg[1]);
- break;
+ tprintf(", %" PRI_kld, arg2);
+ return RVAL_DECODED;
case PR_SET_TSC:
tprints(", ");
- printxval(pr_tsc, tcp->u_arg[1], "PR_TSC_???");
- break;
+ printxval(pr_tsc, arg2, "PR_TSC_???");
+ return RVAL_DECODED;
case PR_SET_UNALIGN:
tprints(", ");
- printflags(pr_unalign_flags, tcp->u_arg[1], "PR_UNALIGN_???");
- break;
+ printflags(pr_unalign_flags, arg2, "PR_UNALIGN_???");
+ return RVAL_DECODED;
case PR_SET_NO_NEW_PRIVS:
case PR_SET_THP_DISABLE:
- tprintf(", %lu", tcp->u_arg[1]);
- for (i = 2; i < tcp->s_ent->nargs; i++)
- tprintf(", %#lx", tcp->u_arg[i]);
- break;
+ tprintf(", %" PRI_klu, arg2);
+ print_prctl_args(tcp, 2);
+ return RVAL_DECODED;
- case PR_GET_NO_NEW_PRIVS:
- case PR_GET_THP_DISABLE:
case PR_MCE_KILL_GET:
- /* Return code of "GET" commands will be decoded on exit */
- case PR_MPX_DISABLE_MANAGEMENT:
- case PR_MPX_ENABLE_MANAGEMENT:
- default:
- for (i = 1; i < tcp->s_ent->nargs; i++)
- tprintf(", %#lx", tcp->u_arg[i]);
- break;
- }
- return 0;
-}
-
-static int
-prctl_exit(struct tcb *tcp)
-{
- unsigned long addr;
- unsigned int i;
-
- switch (tcp->u_arg[0]) {
- case PR_CAPBSET_READ:
- case PR_GET_DUMPABLE:
- case PR_GET_KEEPCAPS:
- case PR_GET_NO_NEW_PRIVS:
- case PR_GET_SECCOMP:
- case PR_GET_THP_DISABLE:
- case PR_GET_TIMERSLACK:
- case PR_GET_TIMING:
- return syserror(tcp) ? 0 : RVAL_UDECIMAL;
-
- case PR_GET_CHILD_SUBREAPER:
- case PR_GET_ENDIAN:
- case PR_GET_FPEMU:
- case PR_GET_FPEXC:
- tprints(", ");
- /* cannot use printnum_int() because of syserror() */
- if (!tcp->u_arg[1])
- tprints("NULL");
- else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &i) < 0)
- tprintf("%#lx", tcp->u_arg[1]);
- else
- tprintf("[%u]", i);
- break;
-
- case PR_GET_NAME:
- tprints(", ");
- if (!tcp->u_arg[1])
- tprints("NULL");
- else if (syserror(tcp))
- tprintf("%#lx", tcp->u_arg[1]);
- else
- printstr(tcp, tcp->u_arg[1], -1);
- break;
-
- case PR_GET_PDEATHSIG:
- tprints(", ");
- if (!tcp->u_arg[1])
- tprints("NULL");
- else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &i) < 0)
- tprintf("%#lx", tcp->u_arg[1]);
- else {
- tprints("[");
- tprints(signame(i));
- tprints("]");
- }
- break;
-
- case PR_GET_SECUREBITS:
- if (syserror(tcp) || tcp->u_rval == 0)
+ if (entering(tcp)) {
+ print_prctl_args(tcp, 1);
return 0;
- tcp->auxstr = sprintflags("", secbits, tcp->u_rval);
- return RVAL_STR;
-
- case PR_GET_TID_ADDRESS:
- tprints(", ");
- /* cannot use printnum_long() because of syserror() */
- if (!tcp->u_arg[1])
- tprints("NULL");
- else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &addr) < 0)
- tprintf("%#lx", tcp->u_arg[1]);
- else
- tprintf("[%#lx]", addr);
- break;
-
- case PR_GET_TSC:
- tprints(", ");
- if (!tcp->u_arg[1])
- tprints("NULL");
- else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &i) < 0)
- tprintf("%#lx", tcp->u_arg[1]);
- else {
- tprints("[");
- printxval(pr_tsc, i, "PR_TSC_???");
- tprints("]");
- }
- break;
-
- case PR_GET_UNALIGN:
- tprints(", ");
- if (!tcp->u_arg[1])
- tprints("NULL");
- else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &i) < 0)
- tprintf("%#lx", tcp->u_arg[1]);
- else {
- tprints("[");
- printflags(pr_unalign_flags, i, "PR_UNALIGN_???");
- tprints("]");
}
- break;
-
- case PR_MCE_KILL_GET:
if (syserror(tcp))
return 0;
- tcp->auxstr = xlookup(pr_mce_kill_policy, tcp->u_rval);
+ tcp->auxstr = xlookup(pr_mce_kill_policy,
+ (kernel_ulong_t) tcp->u_rval);
return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL;
+ case PR_SET_FP_MODE:
+ tprints(", ");
+ printflags(pr_fp_mode, arg2, "PR_FP_MODE_???");
+ return RVAL_DECODED;
+
+ case PR_GET_NO_NEW_PRIVS:
+ case PR_GET_THP_DISABLE:
+ case PR_MPX_DISABLE_MANAGEMENT:
+ case PR_MPX_ENABLE_MANAGEMENT:
default:
- break;
+ print_prctl_args(tcp, 1);
+ return RVAL_DECODED;
}
return 0;
}
-SYS_FUNC(prctl)
-{
- return entering(tcp) ? prctl_enter(tcp) : prctl_exit(tcp);
-}
-
-#if defined X86_64 || defined X32
-# include <asm/prctl.h>
+#if defined X86_64 || defined X32 || defined I386
# include "xlat/archvals.h"
SYS_FUNC(arch_prctl)
{
+ const unsigned int option = tcp->u_arg[0];
+ const kernel_ulong_t addr = tcp->u_arg[1];
+
if (entering(tcp))
- printxval(archvals, tcp->u_arg[0], "ARCH_???");
+ printxval(archvals, option, "ARCH_???");
- switch (tcp->u_arg[0]) {
+ switch (option) {
case ARCH_GET_GS:
case ARCH_GET_FS:
- if (exiting(tcp)) {
- if (syserror(tcp))
- break;
+ if (entering(tcp))
tprints(", ");
- printnum_long(tcp, tcp->u_arg[1], "%#lx");
- }
+ else
+ printnum_ptr(tcp, addr);
return 0;
- default:
- if (exiting(tcp))
- return 0;
}
- tprintf(", %#lx", tcp->u_arg[1]);
- return 0;
+ tprintf(", %#" PRI_klx, addr);
+ return RVAL_DECODED;
}
-#endif /* X86_64 || X32 */
+#endif /* X86_64 || X32 || I386 */
projects / strace / blobdiff