/*
* 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>
* 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 "xlat/prctl_options.h"
#include "xlat/pr_cap_ambient.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
#endif
#ifdef HAVE_LINUX_SECCOMP_H
# include <linux/seccomp.h>
#endif
#include "xlat/seccomp_mode.h"
#ifdef HAVE_LINUX_SECUREBITS_H
# include <linux/securebits.h>
#endif
#include "xlat/secbits.h"
/* these constants are the same as in <linux/capability.h> */
enum {
#include "caps0.h"
#include "caps1.h"
};
#include "xlat/cap.h"
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(", %#lx", tcp->u_arg[i]);
}
SYS_FUNC(prctl)
{
unsigned int i;
if (entering(tcp))
printxval(prctl_options, tcp->u_arg[0], "PR_???");
switch (tcp->u_arg[0]) {
case PR_GET_DUMPABLE:
case PR_GET_KEEPCAPS:
case PR_GET_SECCOMP:
case PR_GET_TIMERSLACK:
case PR_GET_TIMING:
return RVAL_DECODED;
case PR_GET_CHILD_SUBREAPER:
case PR_GET_ENDIAN:
case PR_GET_FPEMU:
case PR_GET_FPEXC:
if (entering(tcp))
tprints(", ");
else
printnum_int(tcp, tcp->u_arg[1], "%u");
break;
case PR_GET_NAME:
if (entering(tcp))
tprints(", ");
else {
if (syserror(tcp))
printaddr(tcp->u_arg[1]);
else
printstr(tcp, tcp->u_arg[1], -1);
}
break;
case PR_GET_PDEATHSIG:
if (entering(tcp))
tprints(", ");
else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &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, tcp->u_rval);
return RVAL_STR;
case PR_GET_TID_ADDRESS:
if (entering(tcp))
tprints(", ");
else
printnum_ptr(tcp, tcp->u_arg[1]);
break;
case PR_GET_TSC:
if (entering(tcp))
tprints(", ");
else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &i)) {
tprints("[");
printxval(pr_tsc, i, "PR_TSC_???");
tprints("]");
}
break;
case PR_GET_UNALIGN:
if (entering(tcp))
tprints(", ");
else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &i)) {
tprints("[");
printflags(pr_unalign_flags, i, "PR_UNALIGN_???");
tprints("]");
}
break;
/* PR_TASK_PERF_EVENTS_* take no arguments. */
case PR_TASK_PERF_EVENTS_DISABLE:
case PR_TASK_PERF_EVENTS_ENABLE:
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]);
return RVAL_DECODED;
case PR_CAPBSET_DROP:
case PR_CAPBSET_READ:
tprints(", ");
printxval(cap, tcp->u_arg[1], "CAP_???");
return RVAL_DECODED;
case PR_CAP_AMBIENT:
tprints(", ");
printxval(pr_cap_ambient, tcp->u_arg[1], "PR_CAP_AMBIENT_???");
switch (tcp->u_arg[1]) {
case PR_CAP_AMBIENT_RAISE:
case PR_CAP_AMBIENT_LOWER:
case PR_CAP_AMBIENT_IS_SET:
tprints(", ");
printxval(cap, tcp->u_arg[2], "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_???");
tprints(", ");
if (PR_MCE_KILL_SET == tcp->u_arg[1])
printxval(pr_mce_kill_policy, tcp->u_arg[2],
"PR_MCE_KILL_???");
else
tprintf("%#lx", tcp->u_arg[2]);
print_prctl_args(tcp, 3);
return RVAL_DECODED;
case PR_SET_NAME:
tprints(", ");
printstr(tcp, tcp->u_arg[1], TASK_COMM_LEN);
return RVAL_DECODED;
#ifdef __ANDROID__
# ifndef PR_SET_VMA
# define PR_SET_VMA 0x53564d41
# endif
# ifndef PR_SET_VMA_ANON_NAME
# define PR_SET_VMA_ANON_NAME 0
# endif
case PR_SET_VMA:
if (tcp->u_arg[1] == PR_SET_VMA_ANON_NAME) {
tprintf(", %lu", tcp->u_arg[1]);
tprintf(", %#lx", tcp->u_arg[2]);
tprintf(", %lu, ", tcp->u_arg[3]);
printstr(tcp, tcp->u_arg[4], -1);
} 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_???");
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]);
else
tprints(signame(tcp->u_arg[1]));
return RVAL_DECODED;
case PR_SET_PTRACER:
tprints(", ");
if (tcp->u_arg[1] == -1)
tprints("PR_SET_PTRACER_ANY");
else
tprintf("%lu", tcp->u_arg[1]);
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])
return RVAL_DECODED;
if (SECCOMP_MODE_FILTER == tcp->u_arg[1]) {
tprints(", ");
print_seccomp_filter(tcp, tcp->u_arg[2]);
return RVAL_DECODED;
}
print_prctl_args(tcp, 2);
return RVAL_DECODED;
case PR_SET_SECUREBITS:
tprints(", ");
printflags(secbits, tcp->u_arg[1], "SECBIT_???");
return RVAL_DECODED;
case PR_SET_TIMERSLACK:
tprintf(", %ld", tcp->u_arg[1]);
return RVAL_DECODED;
case PR_SET_TSC:
tprints(", ");
printxval(pr_tsc, tcp->u_arg[1], "PR_TSC_???");
return RVAL_DECODED;
case PR_SET_UNALIGN:
tprints(", ");
printflags(pr_unalign_flags, tcp->u_arg[1], "PR_UNALIGN_???");
return RVAL_DECODED;
case PR_SET_NO_NEW_PRIVS:
case PR_SET_THP_DISABLE:
tprintf(", %lu", tcp->u_arg[1]);
print_prctl_args(tcp, 2);
return RVAL_DECODED;
case PR_MCE_KILL_GET:
if (entering(tcp)) {
print_prctl_args(tcp, 1);
return 0;
}
if (syserror(tcp))
return 0;
tcp->auxstr = xlookup(pr_mce_kill_policy, tcp->u_rval);
return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL;
case PR_GET_NO_NEW_PRIVS:
case PR_GET_THP_DISABLE:
case PR_MPX_DISABLE_MANAGEMENT:
case PR_MPX_ENABLE_MANAGEMENT:
default:
print_prctl_args(tcp, 1);
return RVAL_DECODED;
}
return 0;
}
#if defined X86_64 || defined X32
# include <asm/prctl.h>
# include "xlat/archvals.h"
SYS_FUNC(arch_prctl)
{
if (entering(tcp))
printxval(archvals, tcp->u_arg[0], "ARCH_???");
switch (tcp->u_arg[0]) {
case ARCH_GET_GS:
case ARCH_GET_FS:
if (entering(tcp))
tprints(", ");
else
printnum_ptr(tcp, tcp->u_arg[1]);
return 0;
}
tprintf(", %#lx", tcp->u_arg[1]);
return RVAL_DECODED;
}
#endif /* X86_64 || X32 */