8fb402bccf
This patch adds prctl commands that make it possible to deny the execution of timestamp counters in userspace. If this is not implemented on a specific architecture, prctl will return -EINVAL. ned-off-by: Erik Bosman <ejbosman@cs.vu.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
76 lines
3 KiB
C
76 lines
3 KiB
C
#ifndef _LINUX_PRCTL_H
|
|
#define _LINUX_PRCTL_H
|
|
|
|
/* Values to pass as first argument to prctl() */
|
|
|
|
#define PR_SET_PDEATHSIG 1 /* Second arg is a signal */
|
|
#define PR_GET_PDEATHSIG 2 /* Second arg is a ptr to return the signal */
|
|
|
|
/* Get/set current->mm->dumpable */
|
|
#define PR_GET_DUMPABLE 3
|
|
#define PR_SET_DUMPABLE 4
|
|
|
|
/* Get/set unaligned access control bits (if meaningful) */
|
|
#define PR_GET_UNALIGN 5
|
|
#define PR_SET_UNALIGN 6
|
|
# define PR_UNALIGN_NOPRINT 1 /* silently fix up unaligned user accesses */
|
|
# define PR_UNALIGN_SIGBUS 2 /* generate SIGBUS on unaligned user access */
|
|
|
|
/* Get/set whether or not to drop capabilities on setuid() away from uid 0 */
|
|
#define PR_GET_KEEPCAPS 7
|
|
#define PR_SET_KEEPCAPS 8
|
|
|
|
/* Get/set floating-point emulation control bits (if meaningful) */
|
|
#define PR_GET_FPEMU 9
|
|
#define PR_SET_FPEMU 10
|
|
# define PR_FPEMU_NOPRINT 1 /* silently emulate fp operations accesses */
|
|
# define PR_FPEMU_SIGFPE 2 /* don't emulate fp operations, send SIGFPE instead */
|
|
|
|
/* Get/set floating-point exception mode (if meaningful) */
|
|
#define PR_GET_FPEXC 11
|
|
#define PR_SET_FPEXC 12
|
|
# define PR_FP_EXC_SW_ENABLE 0x80 /* Use FPEXC for FP exception enables */
|
|
# define PR_FP_EXC_DIV 0x010000 /* floating point divide by zero */
|
|
# define PR_FP_EXC_OVF 0x020000 /* floating point overflow */
|
|
# define PR_FP_EXC_UND 0x040000 /* floating point underflow */
|
|
# define PR_FP_EXC_RES 0x080000 /* floating point inexact result */
|
|
# define PR_FP_EXC_INV 0x100000 /* floating point invalid operation */
|
|
# define PR_FP_EXC_DISABLED 0 /* FP exceptions disabled */
|
|
# define PR_FP_EXC_NONRECOV 1 /* async non-recoverable exc. mode */
|
|
# define PR_FP_EXC_ASYNC 2 /* async recoverable exception mode */
|
|
# define PR_FP_EXC_PRECISE 3 /* precise exception mode */
|
|
|
|
/* Get/set whether we use statistical process timing or accurate timestamp
|
|
* based process timing */
|
|
#define PR_GET_TIMING 13
|
|
#define PR_SET_TIMING 14
|
|
# define PR_TIMING_STATISTICAL 0 /* Normal, traditional,
|
|
statistical process timing */
|
|
# define PR_TIMING_TIMESTAMP 1 /* Accurate timestamp based
|
|
process timing */
|
|
|
|
#define PR_SET_NAME 15 /* Set process name */
|
|
#define PR_GET_NAME 16 /* Get process name */
|
|
|
|
/* Get/set process endian */
|
|
#define PR_GET_ENDIAN 19
|
|
#define PR_SET_ENDIAN 20
|
|
# define PR_ENDIAN_BIG 0
|
|
# define PR_ENDIAN_LITTLE 1 /* True little endian mode */
|
|
# define PR_ENDIAN_PPC_LITTLE 2 /* "PowerPC" pseudo little endian */
|
|
|
|
/* Get/set process seccomp mode */
|
|
#define PR_GET_SECCOMP 21
|
|
#define PR_SET_SECCOMP 22
|
|
|
|
/* Get/set the capability bounding set */
|
|
#define PR_CAPBSET_READ 23
|
|
#define PR_CAPBSET_DROP 24
|
|
|
|
/* Get/set the process' ability to use the timestamp counter instruction */
|
|
#define PR_GET_TSC 25
|
|
#define PR_SET_TSC 26
|
|
# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
|
|
# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
|
|
|
|
#endif /* _LINUX_PRCTL_H */
|