cregit-Linux how code gets into the kernel

Release 4.17 include/uapi/linux/prctl.h

Directory: include/uapi/linux
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_PRCTL_H

#define _LINUX_PRCTL_H

#include <linux/types.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 (as per security/commoncap.c) */

#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 (as per security/commoncap.c) */

#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 */

/* Get/set securebits (as per security/commoncap.c) */

#define PR_GET_SECUREBITS 27

#define PR_SET_SECUREBITS 28

/*
 * Get/set the timerslack as used by poll/select/nanosleep
 * A value of 0 means "use default"
 */

#define PR_SET_TIMERSLACK 29

#define PR_GET_TIMERSLACK 30


#define PR_TASK_PERF_EVENTS_DISABLE		31

#define PR_TASK_PERF_EVENTS_ENABLE		32

/*
 * Set early/late kill mode for hwpoison memory corruption.
 * This influences when the process gets killed on a memory corruption.
 */

#define PR_MCE_KILL	33

# define PR_MCE_KILL_CLEAR   0

# define PR_MCE_KILL_SET     1


# define PR_MCE_KILL_LATE    0

# define PR_MCE_KILL_EARLY   1

# define PR_MCE_KILL_DEFAULT 2


#define PR_MCE_KILL_GET 34

/*
 * Tune up process memory map specifics.
 */

#define PR_SET_MM		35

# define PR_SET_MM_START_CODE		1

# define PR_SET_MM_END_CODE		2

# define PR_SET_MM_START_DATA		3

# define PR_SET_MM_END_DATA		4

# define PR_SET_MM_START_STACK		5

# define PR_SET_MM_START_BRK		6

# define PR_SET_MM_BRK			7

# define PR_SET_MM_ARG_START		8

# define PR_SET_MM_ARG_END		9

# define PR_SET_MM_ENV_START		10

# define PR_SET_MM_ENV_END		11

# define PR_SET_MM_AUXV			12

# define PR_SET_MM_EXE_FILE		13

# define PR_SET_MM_MAP			14

# define PR_SET_MM_MAP_SIZE		15

/*
 * This structure provides new memory descriptor
 * map which mostly modifies /proc/pid/stat[m]
 * output for a task. This mostly done in a
 * sake of checkpoint/restore functionality.
 */

struct prctl_mm_map {
	
__u64	start_code;		/* code section bounds */
	
__u64	end_code;
	
__u64	start_data;		/* data section bounds */
	
__u64	end_data;
	
__u64	start_brk;		/* heap for brk() syscall */
	
__u64	brk;
	
__u64	start_stack;		/* stack starts at */
	
__u64	arg_start;		/* command line arguments bounds */
	
__u64	arg_end;
	
__u64	env_start;		/* environment variables bounds */
	
__u64	env_end;
	
__u64	*auxv;			/* auxiliary vector */
	
__u32	auxv_size;		/* vector size */
	
__u32	exe_fd;			/* /proc/$pid/exe link file */
};

/*
 * Set specific pid that is allowed to ptrace the current task.
 * A value of 0 mean "no process".
 */

#define PR_SET_PTRACER 0x59616d61

# define PR_SET_PTRACER_ANY ((unsigned long)-1)


#define PR_SET_CHILD_SUBREAPER	36

#define PR_GET_CHILD_SUBREAPER	37

/*
 * If no_new_privs is set, then operations that grant new privileges (i.e.
 * execve) will either fail or not grant them.  This affects suid/sgid,
 * file capabilities, and LSMs.
 *
 * Operations that merely manipulate or drop existing privileges (setresuid,
 * capset, etc.) will still work.  Drop those privileges if you want them gone.
 *
 * Changing LSM security domain is considered a new privilege.  So, for example,
 * asking selinux for a specific new context (e.g. with runcon) will result
 * in execve returning -EPERM.
 *
 * See Documentation/prctl/no_new_privs.txt for more details.
 */

#define PR_SET_NO_NEW_PRIVS	38

#define PR_GET_NO_NEW_PRIVS	39


#define PR_GET_TID_ADDRESS	40


#define PR_SET_THP_DISABLE	41

#define PR_GET_THP_DISABLE	42

/*
 * Tell the kernel to start/stop helping userspace manage bounds tables.
 */

#define PR_MPX_ENABLE_MANAGEMENT  43

#define PR_MPX_DISABLE_MANAGEMENT 44


#define PR_SET_FP_MODE		45

#define PR_GET_FP_MODE		46

# define PR_FP_MODE_FR		(1 << 0)	
/* 64b FP registers */

# define PR_FP_MODE_FRE		(1 << 1)	
/* 32b compatibility */

/* Control the ambient capability set */

#define PR_CAP_AMBIENT			47

# define PR_CAP_AMBIENT_IS_SET		1

# define PR_CAP_AMBIENT_RAISE		2

# define PR_CAP_AMBIENT_LOWER		3

# define PR_CAP_AMBIENT_CLEAR_ALL	4

/* arm64 Scalable Vector Extension controls */
/* Flag values must be kept in sync with ptrace NT_ARM_SVE interface */

#define PR_SVE_SET_VL			50	
/* set task vector length */

# define PR_SVE_SET_VL_ONEXEC		(1 << 18) 
/* defer effect until exec */

#define PR_SVE_GET_VL			51	
/* get task vector length */
/* Bits common to PR_SVE_SET_VL and PR_SVE_GET_VL */

# define PR_SVE_VL_LEN_MASK		0xffff

# define PR_SVE_VL_INHERIT		(1 << 17) 
/* inherit across exec */

/* Per task speculation control */

#define PR_GET_SPECULATION_CTRL		52

#define PR_SET_SPECULATION_CTRL		53
/* Speculation control variants */

# define PR_SPEC_STORE_BYPASS		0
/* Return and control values for PR_SET/GET_SPECULATION_CTRL */

# define PR_SPEC_NOT_AFFECTED		0

# define PR_SPEC_PRCTL			(1UL << 0)

# define PR_SPEC_ENABLE			(1UL << 1)

# define PR_SPEC_DISABLE		(1UL << 2)

# define PR_SPEC_FORCE_DISABLE		(1UL << 3)

#endif /* _LINUX_PRCTL_H */

Overall Contributors
PersonTokensPropCommitsCommitProp
Cyrill V. Gorcunov13023.47%512.20%


Linus Torvalds (pre-git)559.93%512.20%


Thomas Gleixner356.32%24.88%


Andi Kleen346.14%37.32%


Kumar Gala305.42%12.44%


Andrew Lutomirski305.42%37.32%


Paul Mackerras295.23%12.44%


Dave P Martin274.87%24.88%


Anton Blanchard234.15%12.44%


Erik Bosman193.43%12.44%


David Mosberger-Tang193.43%12.44%


Doug Ledford193.43%12.44%


Paul Burton183.25%12.44%


Andrew G. Morgan111.99%12.44%


Dave Hansen91.62%12.44%


Kees Cook91.62%24.88%


Andrea Arcangeli91.62%12.44%


Arjan van de Ven91.62%12.44%


Serge E. Hallyn81.44%12.44%


Alex Thorlton81.44%12.44%


Lennart Poettering81.44%12.44%


Ingo Molnar81.44%24.88%


Prasanna Meda50.90%12.44%


Greg Kroah-Hartman10.18%12.44%


Linus Torvalds10.18%12.44%


Total554100.00%41100.00%


Directory: include/uapi/linux



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