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1 #ifndef _LINUX_PRCTL_H
2 #define _LINUX_PRCTL_H
3 
4 #include <linux/types.h>
5 
6 /* Values to pass as first argument to prctl() */
7 
8 #define PR_SET_PDEATHSIG  1  /* Second arg is a signal */
9 #define PR_GET_PDEATHSIG  2  /* Second arg is a ptr to return the signal */
10 
11 /* Get/set current->mm->dumpable */
12 #define PR_GET_DUMPABLE   3
13 #define PR_SET_DUMPABLE   4
14 
15 /* Get/set unaligned access control bits (if meaningful) */
16 #define PR_GET_UNALIGN	  5
17 #define PR_SET_UNALIGN	  6
18 # define PR_UNALIGN_NOPRINT	1	/* silently fix up unaligned user accesses */
19 # define PR_UNALIGN_SIGBUS	2	/* generate SIGBUS on unaligned user access */
20 
21 /* Get/set whether or not to drop capabilities on setuid() away from
22  * uid 0 (as per security/commoncap.c) */
23 #define PR_GET_KEEPCAPS   7
24 #define PR_SET_KEEPCAPS   8
25 
26 /* Get/set floating-point emulation control bits (if meaningful) */
27 #define PR_GET_FPEMU  9
28 #define PR_SET_FPEMU 10
29 # define PR_FPEMU_NOPRINT	1	/* silently emulate fp operations accesses */
30 # define PR_FPEMU_SIGFPE	2	/* don't emulate fp operations, send SIGFPE instead */
31 
32 /* Get/set floating-point exception mode (if meaningful) */
33 #define PR_GET_FPEXC	11
34 #define PR_SET_FPEXC	12
35 # define PR_FP_EXC_SW_ENABLE	0x80	/* Use FPEXC for FP exception enables */
36 # define PR_FP_EXC_DIV		0x010000	/* floating point divide by zero */
37 # define PR_FP_EXC_OVF		0x020000	/* floating point overflow */
38 # define PR_FP_EXC_UND		0x040000	/* floating point underflow */
39 # define PR_FP_EXC_RES		0x080000	/* floating point inexact result */
40 # define PR_FP_EXC_INV		0x100000	/* floating point invalid operation */
41 # define PR_FP_EXC_DISABLED	0	/* FP exceptions disabled */
42 # define PR_FP_EXC_NONRECOV	1	/* async non-recoverable exc. mode */
43 # define PR_FP_EXC_ASYNC	2	/* async recoverable exception mode */
44 # define PR_FP_EXC_PRECISE	3	/* precise exception mode */
45 
46 /* Get/set whether we use statistical process timing or accurate timestamp
47  * based process timing */
48 #define PR_GET_TIMING   13
49 #define PR_SET_TIMING   14
50 # define PR_TIMING_STATISTICAL  0       /* Normal, traditional,
51                                                    statistical process timing */
52 # define PR_TIMING_TIMESTAMP    1       /* Accurate timestamp based
53                                                    process timing */
54 
55 #define PR_SET_NAME    15		/* Set process name */
56 #define PR_GET_NAME    16		/* Get process name */
57 
58 /* Get/set process endian */
59 #define PR_GET_ENDIAN	19
60 #define PR_SET_ENDIAN	20
61 # define PR_ENDIAN_BIG		0
62 # define PR_ENDIAN_LITTLE	1	/* True little endian mode */
63 # define PR_ENDIAN_PPC_LITTLE	2	/* "PowerPC" pseudo little endian */
64 
65 /* Get/set process seccomp mode */
66 #define PR_GET_SECCOMP	21
67 #define PR_SET_SECCOMP	22
68 
69 /* Get/set the capability bounding set (as per security/commoncap.c) */
70 #define PR_CAPBSET_READ 23
71 #define PR_CAPBSET_DROP 24
72 
73 /* Get/set the process' ability to use the timestamp counter instruction */
74 #define PR_GET_TSC 25
75 #define PR_SET_TSC 26
76 # define PR_TSC_ENABLE		1	/* allow the use of the timestamp counter */
77 # define PR_TSC_SIGSEGV		2	/* throw a SIGSEGV instead of reading the TSC */
78 
79 /* Get/set securebits (as per security/commoncap.c) */
80 #define PR_GET_SECUREBITS 27
81 #define PR_SET_SECUREBITS 28
82 
83 /*
84  * Get/set the timerslack as used by poll/select/nanosleep
85  * A value of 0 means "use default"
86  */
87 #define PR_SET_TIMERSLACK 29
88 #define PR_GET_TIMERSLACK 30
89 
90 #define PR_TASK_PERF_EVENTS_DISABLE		31
91 #define PR_TASK_PERF_EVENTS_ENABLE		32
92 
93 /*
94  * Set early/late kill mode for hwpoison memory corruption.
95  * This influences when the process gets killed on a memory corruption.
96  */
97 #define PR_MCE_KILL	33
98 # define PR_MCE_KILL_CLEAR   0
99 # define PR_MCE_KILL_SET     1
100 
101 # define PR_MCE_KILL_LATE    0
102 # define PR_MCE_KILL_EARLY   1
103 # define PR_MCE_KILL_DEFAULT 2
104 
105 #define PR_MCE_KILL_GET 34
106 
107 /*
108  * Tune up process memory map specifics.
109  */
110 #define PR_SET_MM		35
111 # define PR_SET_MM_START_CODE		1
112 # define PR_SET_MM_END_CODE		2
113 # define PR_SET_MM_START_DATA		3
114 # define PR_SET_MM_END_DATA		4
115 # define PR_SET_MM_START_STACK		5
116 # define PR_SET_MM_START_BRK		6
117 # define PR_SET_MM_BRK			7
118 # define PR_SET_MM_ARG_START		8
119 # define PR_SET_MM_ARG_END		9
120 # define PR_SET_MM_ENV_START		10
121 # define PR_SET_MM_ENV_END		11
122 # define PR_SET_MM_AUXV			12
123 # define PR_SET_MM_EXE_FILE		13
124 # define PR_SET_MM_MAP			14
125 # define PR_SET_MM_MAP_SIZE		15
126 
127 /*
128  * This structure provides new memory descriptor
129  * map which mostly modifies /proc/pid/stat[m]
130  * output for a task. This mostly done in a
131  * sake of checkpoint/restore functionality.
132  */
133 struct prctl_mm_map {
134 	__u64	start_code;		/* code section bounds */
135 	__u64	end_code;
136 	__u64	start_data;		/* data section bounds */
137 	__u64	end_data;
138 	__u64	start_brk;		/* heap for brk() syscall */
139 	__u64	brk;
140 	__u64	start_stack;		/* stack starts at */
141 	__u64	arg_start;		/* command line arguments bounds */
142 	__u64	arg_end;
143 	__u64	env_start;		/* environment variables bounds */
144 	__u64	env_end;
145 	__u64	*auxv;			/* auxiliary vector */
146 	__u32	auxv_size;		/* vector size */
147 	__u32	exe_fd;			/* /proc/$pid/exe link file */
148 };
149 
150 /*
151  * Set specific pid that is allowed to ptrace the current task.
152  * A value of 0 mean "no process".
153  */
154 #define PR_SET_PTRACER 0x59616d61
155 # define PR_SET_PTRACER_ANY ((unsigned long)-1)
156 
157 #define PR_SET_CHILD_SUBREAPER	36
158 #define PR_GET_CHILD_SUBREAPER	37
159 
160 /*
161  * If no_new_privs is set, then operations that grant new privileges (i.e.
162  * execve) will either fail or not grant them.  This affects suid/sgid,
163  * file capabilities, and LSMs.
164  *
165  * Operations that merely manipulate or drop existing privileges (setresuid,
166  * capset, etc.) will still work.  Drop those privileges if you want them gone.
167  *
168  * Changing LSM security domain is considered a new privilege.  So, for example,
169  * asking selinux for a specific new context (e.g. with runcon) will result
170  * in execve returning -EPERM.
171  *
172  * See Documentation/prctl/no_new_privs.txt for more details.
173  */
174 #define PR_SET_NO_NEW_PRIVS	38
175 #define PR_GET_NO_NEW_PRIVS	39
176 
177 #define PR_GET_TID_ADDRESS	40
178 
179 #define PR_SET_THP_DISABLE	41
180 #define PR_GET_THP_DISABLE	42
181 
182 /*
183  * Tell the kernel to start/stop helping userspace manage bounds tables.
184  */
185 #define PR_MPX_ENABLE_MANAGEMENT  43
186 #define PR_MPX_DISABLE_MANAGEMENT 44
187 
188 #define PR_SET_FP_MODE		45
189 #define PR_GET_FP_MODE		46
190 # define PR_FP_MODE_FR		(1 << 0)	/* 64b FP registers */
191 # define PR_FP_MODE_FRE		(1 << 1)	/* 32b compatibility */
192 
193 /* Control the ambient capability set */
194 #define PR_CAP_AMBIENT			47
195 # define PR_CAP_AMBIENT_IS_SET		1
196 # define PR_CAP_AMBIENT_RAISE		2
197 # define PR_CAP_AMBIENT_LOWER		3
198 # define PR_CAP_AMBIENT_CLEAR_ALL	4
199 
200 #endif /* _LINUX_PRCTL_H */
201