linux/include/linux/prctl.h
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   1#ifndef _LINUX_PRCTL_H
   2#define _LINUX_PRCTL_H
   3
   4/* Values to pass as first argument to prctl() */
   5
   6#define PR_SET_PDEATHSIG  1  /* Second arg is a signal */
   7#define PR_GET_PDEATHSIG  2  /* Second arg is a ptr to return the signal */
   8
   9/* Get/set current->mm->dumpable */
  10#define PR_GET_DUMPABLE   3
  11#define PR_SET_DUMPABLE   4
  12
  13/* Get/set unaligned access control bits (if meaningful) */
  14#define PR_GET_UNALIGN    5
  15#define PR_SET_UNALIGN    6
  16# define PR_UNALIGN_NOPRINT     1       /* silently fix up unaligned user accesses */
  17# define PR_UNALIGN_SIGBUS      2       /* generate SIGBUS on unaligned user access */
  18
  19/* Get/set whether or not to drop capabilities on setuid() away from
  20 * uid 0 (as per security/commoncap.c) */
  21#define PR_GET_KEEPCAPS   7
  22#define PR_SET_KEEPCAPS   8
  23
  24/* Get/set floating-point emulation control bits (if meaningful) */
  25#define PR_GET_FPEMU  9
  26#define PR_SET_FPEMU 10
  27# define PR_FPEMU_NOPRINT       1       /* silently emulate fp operations accesses */
  28# define PR_FPEMU_SIGFPE        2       /* don't emulate fp operations, send SIGFPE instead */
  29
  30/* Get/set floating-point exception mode (if meaningful) */
  31#define PR_GET_FPEXC    11
  32#define PR_SET_FPEXC    12
  33# define PR_FP_EXC_SW_ENABLE    0x80    /* Use FPEXC for FP exception enables */
  34# define PR_FP_EXC_DIV          0x010000        /* floating point divide by zero */
  35# define PR_FP_EXC_OVF          0x020000        /* floating point overflow */
  36# define PR_FP_EXC_UND          0x040000        /* floating point underflow */
  37# define PR_FP_EXC_RES          0x080000        /* floating point inexact result */
  38# define PR_FP_EXC_INV          0x100000        /* floating point invalid operation */
  39# define PR_FP_EXC_DISABLED     0       /* FP exceptions disabled */
  40# define PR_FP_EXC_NONRECOV     1       /* async non-recoverable exc. mode */
  41# define PR_FP_EXC_ASYNC        2       /* async recoverable exception mode */
  42# define PR_FP_EXC_PRECISE      3       /* precise exception mode */
  43
  44/* Get/set whether we use statistical process timing or accurate timestamp
  45 * based process timing */
  46#define PR_GET_TIMING   13
  47#define PR_SET_TIMING   14
  48# define PR_TIMING_STATISTICAL  0       /* Normal, traditional,
  49                                                   statistical process timing */
  50# define PR_TIMING_TIMESTAMP    1       /* Accurate timestamp based
  51                                                   process timing */
  52
  53#define PR_SET_NAME    15               /* Set process name */
  54#define PR_GET_NAME    16               /* Get process name */
  55
  56/* Get/set process endian */
  57#define PR_GET_ENDIAN   19
  58#define PR_SET_ENDIAN   20
  59# define PR_ENDIAN_BIG          0
  60# define PR_ENDIAN_LITTLE       1       /* True little endian mode */
  61# define PR_ENDIAN_PPC_LITTLE   2       /* "PowerPC" pseudo little endian */
  62
  63/* Get/set process seccomp mode */
  64#define PR_GET_SECCOMP  21
  65#define PR_SET_SECCOMP  22
  66
  67/* Get/set the capability bounding set (as per security/commoncap.c) */
  68#define PR_CAPBSET_READ 23
  69#define PR_CAPBSET_DROP 24
  70
  71/* Get/set the process' ability to use the timestamp counter instruction */
  72#define PR_GET_TSC 25
  73#define PR_SET_TSC 26
  74# define PR_TSC_ENABLE          1       /* allow the use of the timestamp counter */
  75# define PR_TSC_SIGSEGV         2       /* throw a SIGSEGV instead of reading the TSC */
  76
  77/* Get/set securebits (as per security/commoncap.c) */
  78#define PR_GET_SECUREBITS 27
  79#define PR_SET_SECUREBITS 28
  80
  81/*
  82 * Get/set the timerslack as used by poll/select/nanosleep
  83 * A value of 0 means "use default"
  84 */
  85#define PR_SET_TIMERSLACK 29
  86#define PR_GET_TIMERSLACK 30
  87
  88#define PR_TASK_PERF_EVENTS_DISABLE             31
  89#define PR_TASK_PERF_EVENTS_ENABLE              32
  90
  91/*
  92 * Set early/late kill mode for hwpoison memory corruption.
  93 * This influences when the process gets killed on a memory corruption.
  94 */
  95#define PR_MCE_KILL     33
  96# define PR_MCE_KILL_CLEAR   0
  97# define PR_MCE_KILL_SET     1
  98
  99# define PR_MCE_KILL_LATE    0
 100# define PR_MCE_KILL_EARLY   1
 101# define PR_MCE_KILL_DEFAULT 2
 102
 103#define PR_MCE_KILL_GET 34
 104
 105/*
 106 * Tune up process memory map specifics.
 107 */
 108#define PR_SET_MM               35
 109# define PR_SET_MM_START_CODE           1
 110# define PR_SET_MM_END_CODE             2
 111# define PR_SET_MM_START_DATA           3
 112# define PR_SET_MM_END_DATA             4
 113# define PR_SET_MM_START_STACK          5
 114# define PR_SET_MM_START_BRK            6
 115# define PR_SET_MM_BRK                  7
 116# define PR_SET_MM_ARG_START            8
 117# define PR_SET_MM_ARG_END              9
 118# define PR_SET_MM_ENV_START            10
 119# define PR_SET_MM_ENV_END              11
 120# define PR_SET_MM_AUXV                 12
 121# define PR_SET_MM_EXE_FILE             13
 122
 123/*
 124 * Set specific pid that is allowed to ptrace the current task.
 125 * A value of 0 mean "no process".
 126 */
 127#define PR_SET_PTRACER 0x59616d61
 128# define PR_SET_PTRACER_ANY ((unsigned long)-1)
 129
 130#define PR_SET_CHILD_SUBREAPER  36
 131#define PR_GET_CHILD_SUBREAPER  37
 132
 133/*
 134 * If no_new_privs is set, then operations that grant new privileges (i.e.
 135 * execve) will either fail or not grant them.  This affects suid/sgid,
 136 * file capabilities, and LSMs.
 137 *
 138 * Operations that merely manipulate or drop existing privileges (setresuid,
 139 * capset, etc.) will still work.  Drop those privileges if you want them gone.
 140 *
 141 * Changing LSM security domain is considered a new privilege.  So, for example,
 142 * asking selinux for a specific new context (e.g. with runcon) will result
 143 * in execve returning -EPERM.
 144 *
 145 * See Documentation/prctl/no_new_privs.txt for more details.
 146 */
 147#define PR_SET_NO_NEW_PRIVS     38
 148#define PR_GET_NO_NEW_PRIVS     39
 149
 150#define PR_GET_TID_ADDRESS      40
 151
 152#endif /* _LINUX_PRCTL_H */
 153
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