tools/include/uapi/linux/prctl.h - linux/torvalds/linux - Git at Google

 /* 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/userspace-api/no_new_privs.rst 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

 /*
  * No longer implemented, but left here to ensure the numbers stay reserved:
  */
 #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
 # define PR_SPEC_INDIRECT_BRANCH	1
 /* 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)
 # define PR_SPEC_DISABLE_NOEXEC		(1UL << 4)

 /* Reset arm64 pointer authentication keys */
 #define PR_PAC_RESET_KEYS		54
 # define PR_PAC_APIAKEY			(1UL << 0)
 # define PR_PAC_APIBKEY			(1UL << 1)
 # define PR_PAC_APDAKEY			(1UL << 2)
 # define PR_PAC_APDBKEY			(1UL << 3)
 # define PR_PAC_APGAKEY			(1UL << 4)

 /* Tagged user address controls for arm64 */
 #define PR_SET_TAGGED_ADDR_CTRL		55
 #define PR_GET_TAGGED_ADDR_CTRL		56
 # define PR_TAGGED_ADDR_ENABLE		(1UL << 0)

 /* Control reclaim behavior when allocating memory */
 #define PR_SET_IO_FLUSHER		57
 #define PR_GET_IO_FLUSHER		58

 #endif /* _LINUX_PRCTL_H */
	/* 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/userspace-api/no_new_privs.rst 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

	/*
	* No longer implemented, but left here to ensure the numbers stay reserved:
	*/
	#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
	# define PR_SPEC_INDIRECT_BRANCH 1
	/* 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)
	# define PR_SPEC_DISABLE_NOEXEC (1UL << 4)

	/* Reset arm64 pointer authentication keys */
	#define PR_PAC_RESET_KEYS 54
	# define PR_PAC_APIAKEY (1UL << 0)
	# define PR_PAC_APIBKEY (1UL << 1)
	# define PR_PAC_APDAKEY (1UL << 2)
	# define PR_PAC_APDBKEY (1UL << 3)
	# define PR_PAC_APGAKEY (1UL << 4)

	/* Tagged user address controls for arm64 */
	#define PR_SET_TAGGED_ADDR_CTRL 55
	#define PR_GET_TAGGED_ADDR_CTRL 56
	# define PR_TAGGED_ADDR_ENABLE (1UL << 0)

	/* Control reclaim behavior when allocating memory */
	#define PR_SET_IO_FLUSHER 57
	#define PR_GET_IO_FLUSHER 58

	#endif /* _LINUX_PRCTL_H */