| /* 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 |
| # define PR_SPEC_L1D_FLUSH 2 |
| /* 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) |
| /* MTE tag check fault modes */ |
| # define PR_MTE_TCF_NONE 0UL |
| # define PR_MTE_TCF_SYNC (1UL << 1) |
| # define PR_MTE_TCF_ASYNC (1UL << 2) |
| # define PR_MTE_TCF_MASK (PR_MTE_TCF_SYNC | PR_MTE_TCF_ASYNC) |
| /* MTE tag inclusion mask */ |
| # define PR_MTE_TAG_SHIFT 3 |
| # define PR_MTE_TAG_MASK (0xffffUL << PR_MTE_TAG_SHIFT) |
| /* Unused; kept only for source compatibility */ |
| # define PR_MTE_TCF_SHIFT 1 |
| |
| /* Control reclaim behavior when allocating memory */ |
| #define PR_SET_IO_FLUSHER 57 |
| #define PR_GET_IO_FLUSHER 58 |
| |
| /* Dispatch syscalls to a userspace handler */ |
| #define PR_SET_SYSCALL_USER_DISPATCH 59 |
| # define PR_SYS_DISPATCH_OFF 0 |
| # define PR_SYS_DISPATCH_ON 1 |
| /* The control values for the user space selector when dispatch is enabled */ |
| # define SYSCALL_DISPATCH_FILTER_ALLOW 0 |
| # define SYSCALL_DISPATCH_FILTER_BLOCK 1 |
| |
| /* Set/get enabled arm64 pointer authentication keys */ |
| #define PR_PAC_SET_ENABLED_KEYS 60 |
| #define PR_PAC_GET_ENABLED_KEYS 61 |
| |
| /* Request the scheduler to share a core */ |
| #define PR_SCHED_CORE 62 |
| # define PR_SCHED_CORE_GET 0 |
| # define PR_SCHED_CORE_CREATE 1 /* create unique core_sched cookie */ |
| # define PR_SCHED_CORE_SHARE_TO 2 /* push core_sched cookie to pid */ |
| # define PR_SCHED_CORE_SHARE_FROM 3 /* pull core_sched cookie to pid */ |
| # define PR_SCHED_CORE_MAX 4 |
| # define PR_SCHED_CORE_SCOPE_THREAD 0 |
| # define PR_SCHED_CORE_SCOPE_THREAD_GROUP 1 |
| # define PR_SCHED_CORE_SCOPE_PROCESS_GROUP 2 |
| |
| /* arm64 Scalable Matrix Extension controls */ |
| /* Flag values must be in sync with SVE versions */ |
| #define PR_SME_SET_VL 63 /* set task vector length */ |
| # define PR_SME_SET_VL_ONEXEC (1 << 18) /* defer effect until exec */ |
| #define PR_SME_GET_VL 64 /* get task vector length */ |
| /* Bits common to PR_SME_SET_VL and PR_SME_GET_VL */ |
| # define PR_SME_VL_LEN_MASK 0xffff |
| # define PR_SME_VL_INHERIT (1 << 17) /* inherit across exec */ |
| |
| /* Memory deny write / execute */ |
| #define PR_SET_MDWE 65 |
| # define PR_MDWE_REFUSE_EXEC_GAIN (1UL << 0) |
| # define PR_MDWE_NO_INHERIT (1UL << 1) |
| |
| #define PR_GET_MDWE 66 |
| |
| #define PR_SET_VMA 0x53564d41 |
| # define PR_SET_VMA_ANON_NAME 0 |
| |
| #define PR_GET_AUXV 0x41555856 |
| |
| #define PR_SET_MEMORY_MERGE 67 |
| #define PR_GET_MEMORY_MERGE 68 |
| |
| #define PR_RISCV_V_SET_CONTROL 69 |
| #define PR_RISCV_V_GET_CONTROL 70 |
| # define PR_RISCV_V_VSTATE_CTRL_DEFAULT 0 |
| # define PR_RISCV_V_VSTATE_CTRL_OFF 1 |
| # define PR_RISCV_V_VSTATE_CTRL_ON 2 |
| # define PR_RISCV_V_VSTATE_CTRL_INHERIT (1 << 4) |
| # define PR_RISCV_V_VSTATE_CTRL_CUR_MASK 0x3 |
| # define PR_RISCV_V_VSTATE_CTRL_NEXT_MASK 0xc |
| # define PR_RISCV_V_VSTATE_CTRL_MASK 0x1f |
| |
| #endif /* _LINUX_PRCTL_H */ |
