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#include "defs.h"
#include <sys/prctl.h>
#include "xlat/prctl_options.h"
#include "xlat/pr_unalign_flags.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"
#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 int
prctl_enter(struct tcb *tcp)
{
unsigned int i;
printxval(prctl_options, tcp->u_arg[0], "PR_???");
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:
case PR_GET_NAME:
case PR_GET_PDEATHSIG:
case PR_GET_SECCOMP:
case PR_GET_SECUREBITS:
case PR_GET_TID_ADDRESS:
case PR_GET_TIMERSLACK:
case PR_GET_TIMING:
case PR_GET_TSC:
case PR_GET_UNALIGN:
/* PR_TASK_PERF_EVENTS_* have nothing to decode on enter. */
case PR_TASK_PERF_EVENTS_DISABLE:
case PR_TASK_PERF_EVENTS_ENABLE:
break;
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;
case PR_CAPBSET_DROP:
case PR_CAPBSET_READ:
tprints(", ");
printxval(cap, tcp->u_arg[1], "CAP_???");
break;
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]);
for (i = 3; i < tcp->s_ent->nargs; i++)
tprintf(", %#lx", tcp->u_arg[i]);
break;
case PR_SET_NAME:
tprints(", ");
printstr(tcp, tcp->u_arg[1], TASK_COMM_LEN);
break;
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;
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]));
break;
case PR_SET_PTRACER:
tprints(", ");
if (tcp->u_arg[1] == -1)
tprints("PR_SET_PTRACER_ANY");
else
tprintf("%lu", tcp->u_arg[1]);
break;
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]) {
tprints(", ");
print_seccomp_filter(tcp, tcp->u_arg[2]);
break;
}
for (i = 2; i < tcp->s_ent->nargs; i++)
tprintf(", %#lx", tcp->u_arg[i]);
break;
case PR_SET_SECUREBITS:
tprints(", ");
printflags(secbits, tcp->u_arg[1], "SECBIT_???");
break;
case PR_SET_TIMERSLACK:
tprintf(", %ld", tcp->u_arg[1]);
break;
case PR_SET_TSC:
tprints(", ");
printxval(pr_tsc, tcp->u_arg[1], "PR_TSC_???");
break;
case PR_SET_UNALIGN:
tprints(", ");
printflags(pr_unalign_flags, tcp->u_arg[1], "PR_UNALIGN_???");
break;
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;
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)
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);
return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL;
default:
break;
}
return 0;
}
int
sys_prctl(struct tcb *tcp)
{
return entering(tcp) ? prctl_enter(tcp) : prctl_exit(tcp);
}
#if defined X86_64 || defined X32
# include <asm/prctl.h>
# include "xlat/archvals.h"
int
sys_arch_prctl(struct tcb *tcp)
{
if (entering(tcp))
printxval(archvals, tcp->u_arg[0], "ARCH_???");
switch (tcp->u_arg[0]) {
case ARCH_GET_GS:
case ARCH_GET_FS:
if (exiting(tcp)) {
if (syserror(tcp))
break;
tprints(", ");
printnum_long(tcp, tcp->u_arg[1], "%#lx");
}
return 0;
default:
if (exiting(tcp))
return 0;
}
tprintf(", %#lx", tcp->u_arg[1]);
return 0;
}
#endif /* X86_64 || X32 */
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