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6f52b16c | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
1da177e4 LT |
2 | #ifndef _LINUX_PRCTL_H |
3 | #define _LINUX_PRCTL_H | |
4 | ||
f606b77f CG |
5 | #include <linux/types.h> |
6 | ||
1da177e4 LT |
7 | /* Values to pass as first argument to prctl() */ |
8 | ||
9 | #define PR_SET_PDEATHSIG 1 /* Second arg is a signal */ | |
10 | #define PR_GET_PDEATHSIG 2 /* Second arg is a ptr to return the signal */ | |
11 | ||
12 | /* Get/set current->mm->dumpable */ | |
13 | #define PR_GET_DUMPABLE 3 | |
14 | #define PR_SET_DUMPABLE 4 | |
15 | ||
16 | /* Get/set unaligned access control bits (if meaningful) */ | |
17 | #define PR_GET_UNALIGN 5 | |
18 | #define PR_SET_UNALIGN 6 | |
19 | # define PR_UNALIGN_NOPRINT 1 /* silently fix up unaligned user accesses */ | |
20 | # define PR_UNALIGN_SIGBUS 2 /* generate SIGBUS on unaligned user access */ | |
21 | ||
3898b1b4 AM |
22 | /* Get/set whether or not to drop capabilities on setuid() away from |
23 | * uid 0 (as per security/commoncap.c) */ | |
1da177e4 LT |
24 | #define PR_GET_KEEPCAPS 7 |
25 | #define PR_SET_KEEPCAPS 8 | |
26 | ||
27 | /* Get/set floating-point emulation control bits (if meaningful) */ | |
28 | #define PR_GET_FPEMU 9 | |
29 | #define PR_SET_FPEMU 10 | |
30 | # define PR_FPEMU_NOPRINT 1 /* silently emulate fp operations accesses */ | |
31 | # define PR_FPEMU_SIGFPE 2 /* don't emulate fp operations, send SIGFPE instead */ | |
32 | ||
33 | /* Get/set floating-point exception mode (if meaningful) */ | |
34 | #define PR_GET_FPEXC 11 | |
35 | #define PR_SET_FPEXC 12 | |
36 | # define PR_FP_EXC_SW_ENABLE 0x80 /* Use FPEXC for FP exception enables */ | |
37 | # define PR_FP_EXC_DIV 0x010000 /* floating point divide by zero */ | |
38 | # define PR_FP_EXC_OVF 0x020000 /* floating point overflow */ | |
39 | # define PR_FP_EXC_UND 0x040000 /* floating point underflow */ | |
40 | # define PR_FP_EXC_RES 0x080000 /* floating point inexact result */ | |
41 | # define PR_FP_EXC_INV 0x100000 /* floating point invalid operation */ | |
42 | # define PR_FP_EXC_DISABLED 0 /* FP exceptions disabled */ | |
43 | # define PR_FP_EXC_NONRECOV 1 /* async non-recoverable exc. mode */ | |
44 | # define PR_FP_EXC_ASYNC 2 /* async recoverable exception mode */ | |
45 | # define PR_FP_EXC_PRECISE 3 /* precise exception mode */ | |
46 | ||
47 | /* Get/set whether we use statistical process timing or accurate timestamp | |
48 | * based process timing */ | |
49 | #define PR_GET_TIMING 13 | |
50 | #define PR_SET_TIMING 14 | |
51 | # define PR_TIMING_STATISTICAL 0 /* Normal, traditional, | |
52 | statistical process timing */ | |
53 | # define PR_TIMING_TIMESTAMP 1 /* Accurate timestamp based | |
54 | process timing */ | |
55 | ||
56 | #define PR_SET_NAME 15 /* Set process name */ | |
57 | #define PR_GET_NAME 16 /* Get process name */ | |
58 | ||
651d765d AB |
59 | /* Get/set process endian */ |
60 | #define PR_GET_ENDIAN 19 | |
61 | #define PR_SET_ENDIAN 20 | |
62 | # define PR_ENDIAN_BIG 0 | |
63 | # define PR_ENDIAN_LITTLE 1 /* True little endian mode */ | |
64 | # define PR_ENDIAN_PPC_LITTLE 2 /* "PowerPC" pseudo little endian */ | |
65 | ||
1d9d02fe AA |
66 | /* Get/set process seccomp mode */ |
67 | #define PR_GET_SECCOMP 21 | |
68 | #define PR_SET_SECCOMP 22 | |
69 | ||
3898b1b4 | 70 | /* Get/set the capability bounding set (as per security/commoncap.c) */ |
3b7391de SH |
71 | #define PR_CAPBSET_READ 23 |
72 | #define PR_CAPBSET_DROP 24 | |
73 | ||
8fb402bc EB |
74 | /* Get/set the process' ability to use the timestamp counter instruction */ |
75 | #define PR_GET_TSC 25 | |
76 | #define PR_SET_TSC 26 | |
77 | # define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */ | |
78 | # define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */ | |
79 | ||
3898b1b4 AM |
80 | /* Get/set securebits (as per security/commoncap.c) */ |
81 | #define PR_GET_SECUREBITS 27 | |
82 | #define PR_SET_SECUREBITS 28 | |
83 | ||
6976675d AV |
84 | /* |
85 | * Get/set the timerslack as used by poll/select/nanosleep | |
86 | * A value of 0 means "use default" | |
87 | */ | |
88 | #define PR_SET_TIMERSLACK 29 | |
89 | #define PR_GET_TIMERSLACK 30 | |
90 | ||
cdd6c482 IM |
91 | #define PR_TASK_PERF_EVENTS_DISABLE 31 |
92 | #define PR_TASK_PERF_EVENTS_ENABLE 32 | |
1d1c7ddb | 93 | |
1087e9b4 AK |
94 | /* |
95 | * Set early/late kill mode for hwpoison memory corruption. | |
96 | * This influences when the process gets killed on a memory corruption. | |
97 | */ | |
4db96cf0 | 98 | #define PR_MCE_KILL 33 |
1087e9b4 AK |
99 | # define PR_MCE_KILL_CLEAR 0 |
100 | # define PR_MCE_KILL_SET 1 | |
101 | ||
102 | # define PR_MCE_KILL_LATE 0 | |
103 | # define PR_MCE_KILL_EARLY 1 | |
104 | # define PR_MCE_KILL_DEFAULT 2 | |
105 | ||
106 | #define PR_MCE_KILL_GET 34 | |
4db96cf0 | 107 | |
028ee4be CG |
108 | /* |
109 | * Tune up process memory map specifics. | |
110 | */ | |
111 | #define PR_SET_MM 35 | |
112 | # define PR_SET_MM_START_CODE 1 | |
113 | # define PR_SET_MM_END_CODE 2 | |
114 | # define PR_SET_MM_START_DATA 3 | |
115 | # define PR_SET_MM_END_DATA 4 | |
116 | # define PR_SET_MM_START_STACK 5 | |
117 | # define PR_SET_MM_START_BRK 6 | |
118 | # define PR_SET_MM_BRK 7 | |
fe8c7f5c CG |
119 | # define PR_SET_MM_ARG_START 8 |
120 | # define PR_SET_MM_ARG_END 9 | |
121 | # define PR_SET_MM_ENV_START 10 | |
122 | # define PR_SET_MM_ENV_END 11 | |
123 | # define PR_SET_MM_AUXV 12 | |
b32dfe37 | 124 | # define PR_SET_MM_EXE_FILE 13 |
f606b77f CG |
125 | # define PR_SET_MM_MAP 14 |
126 | # define PR_SET_MM_MAP_SIZE 15 | |
127 | ||
128 | /* | |
129 | * This structure provides new memory descriptor | |
130 | * map which mostly modifies /proc/pid/stat[m] | |
131 | * output for a task. This mostly done in a | |
132 | * sake of checkpoint/restore functionality. | |
133 | */ | |
134 | struct prctl_mm_map { | |
135 | __u64 start_code; /* code section bounds */ | |
136 | __u64 end_code; | |
137 | __u64 start_data; /* data section bounds */ | |
138 | __u64 end_data; | |
139 | __u64 start_brk; /* heap for brk() syscall */ | |
140 | __u64 brk; | |
141 | __u64 start_stack; /* stack starts at */ | |
142 | __u64 arg_start; /* command line arguments bounds */ | |
143 | __u64 arg_end; | |
144 | __u64 env_start; /* environment variables bounds */ | |
145 | __u64 env_end; | |
146 | __u64 *auxv; /* auxiliary vector */ | |
147 | __u32 auxv_size; /* vector size */ | |
148 | __u32 exe_fd; /* /proc/$pid/exe link file */ | |
149 | }; | |
028ee4be | 150 | |
2d514487 KC |
151 | /* |
152 | * Set specific pid that is allowed to ptrace the current task. | |
153 | * A value of 0 mean "no process". | |
154 | */ | |
155 | #define PR_SET_PTRACER 0x59616d61 | |
bf06189e | 156 | # define PR_SET_PTRACER_ANY ((unsigned long)-1) |
2d514487 | 157 | |
300f786b CG |
158 | #define PR_SET_CHILD_SUBREAPER 36 |
159 | #define PR_GET_CHILD_SUBREAPER 37 | |
ebec18a6 | 160 | |
259e5e6c AL |
161 | /* |
162 | * If no_new_privs is set, then operations that grant new privileges (i.e. | |
163 | * execve) will either fail or not grant them. This affects suid/sgid, | |
164 | * file capabilities, and LSMs. | |
165 | * | |
166 | * Operations that merely manipulate or drop existing privileges (setresuid, | |
167 | * capset, etc.) will still work. Drop those privileges if you want them gone. | |
168 | * | |
169 | * Changing LSM security domain is considered a new privilege. So, for example, | |
170 | * asking selinux for a specific new context (e.g. with runcon) will result | |
171 | * in execve returning -EPERM. | |
c540521b | 172 | * |
5fb94e9c | 173 | * See Documentation/userspace-api/no_new_privs.rst for more details. |
259e5e6c | 174 | */ |
300f786b CG |
175 | #define PR_SET_NO_NEW_PRIVS 38 |
176 | #define PR_GET_NO_NEW_PRIVS 39 | |
177 | ||
178 | #define PR_GET_TID_ADDRESS 40 | |
259e5e6c | 179 | |
a0715cc2 AT |
180 | #define PR_SET_THP_DISABLE 41 |
181 | #define PR_GET_THP_DISABLE 42 | |
182 | ||
fe3d197f DH |
183 | /* |
184 | * Tell the kernel to start/stop helping userspace manage bounds tables. | |
185 | */ | |
186 | #define PR_MPX_ENABLE_MANAGEMENT 43 | |
187 | #define PR_MPX_DISABLE_MANAGEMENT 44 | |
188 | ||
9791554b PB |
189 | #define PR_SET_FP_MODE 45 |
190 | #define PR_GET_FP_MODE 46 | |
191 | # define PR_FP_MODE_FR (1 << 0) /* 64b FP registers */ | |
192 | # define PR_FP_MODE_FRE (1 << 1) /* 32b compatibility */ | |
193 | ||
58319057 AL |
194 | /* Control the ambient capability set */ |
195 | #define PR_CAP_AMBIENT 47 | |
196 | # define PR_CAP_AMBIENT_IS_SET 1 | |
197 | # define PR_CAP_AMBIENT_RAISE 2 | |
198 | # define PR_CAP_AMBIENT_LOWER 3 | |
199 | # define PR_CAP_AMBIENT_CLEAR_ALL 4 | |
200 | ||
7582e220 | 201 | /* arm64 Scalable Vector Extension controls */ |
2d2123bc DM |
202 | /* Flag values must be kept in sync with ptrace NT_ARM_SVE interface */ |
203 | #define PR_SVE_SET_VL 50 /* set task vector length */ | |
7582e220 | 204 | # define PR_SVE_SET_VL_ONEXEC (1 << 18) /* defer effect until exec */ |
2d2123bc DM |
205 | #define PR_SVE_GET_VL 51 /* get task vector length */ |
206 | /* Bits common to PR_SVE_SET_VL and PR_SVE_GET_VL */ | |
7582e220 DM |
207 | # define PR_SVE_VL_LEN_MASK 0xffff |
208 | # define PR_SVE_VL_INHERIT (1 << 17) /* inherit across exec */ | |
209 | ||
b617cfc8 TG |
210 | /* Per task speculation control */ |
211 | #define PR_GET_SPECULATION_CTRL 52 | |
212 | #define PR_SET_SPECULATION_CTRL 53 | |
213 | /* Speculation control variants */ | |
214 | # define PR_SPEC_STORE_BYPASS 0 | |
9137bb27 | 215 | # define PR_SPEC_INDIRECT_BRANCH 1 |
b617cfc8 TG |
216 | /* Return and control values for PR_SET/GET_SPECULATION_CTRL */ |
217 | # define PR_SPEC_NOT_AFFECTED 0 | |
218 | # define PR_SPEC_PRCTL (1UL << 0) | |
219 | # define PR_SPEC_ENABLE (1UL << 1) | |
220 | # define PR_SPEC_DISABLE (1UL << 2) | |
356e4bff | 221 | # define PR_SPEC_FORCE_DISABLE (1UL << 3) |
b617cfc8 | 222 | |
ba830885 KM |
223 | /* Reset arm64 pointer authentication keys */ |
224 | #define PR_PAC_RESET_KEYS 54 | |
225 | # define PR_PAC_APIAKEY (1UL << 0) | |
226 | # define PR_PAC_APIBKEY (1UL << 1) | |
227 | # define PR_PAC_APDAKEY (1UL << 2) | |
228 | # define PR_PAC_APDBKEY (1UL << 3) | |
229 | # define PR_PAC_APGAKEY (1UL << 4) | |
230 | ||
1da177e4 | 231 | #endif /* _LINUX_PRCTL_H */ |