sys/linux/prctl.txt

# Copyright 2018 syzkaller project authors. All rights reserved.
# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.

include <linux/errno.h>
include <linux/sched/coredump.h>
include <uapi/linux/prctl.h>
include <uapi/linux/seccomp.h>
include <uapi/linux/capability.h>
include <uapi/linux/securebits.h>
include <asm/prctl.h>

prctl$PR_SET_PDEATHSIG(option const[PR_SET_PDEATHSIG], arg signalno)
prctl$PR_GET_PDEATHSIG(option const[PR_GET_PDEATHSIG], arg ptr[out, int32])

prctl$PR_GET_DUMPABLE(option const[PR_GET_DUMPABLE])
prctl$PR_SET_DUMPABLE(option const[PR_SET_DUMPABLE], arg flags[prctl_dump_mode])

prctl_dump_mode = SUID_DUMP_USER, SUID_DUMP_ROOT

prctl$PR_GET_UNALIGN(option const[PR_GET_UNALIGN], arg ptr[out, int32])
prctl$PR_SET_UNALIGN(option const[PR_SET_UNALIGN], arg flags[prctl_align_mode])

prctl_align_mode = PR_UNALIGN_NOPRINT, PR_UNALIGN_SIGBUS

prctl$PR_GET_KEEPCAPS(option const[PR_GET_KEEPCAPS])
prctl$PR_SET_KEEPCAPS(option const[PR_SET_KEEPCAPS], arg boolptr)

prctl$PR_GET_FPEMU(option const[PR_GET_FPEMU], arg ptr[out, int32])
prctl$PR_SET_FPEMU(option const[PR_SET_FPEMU], arg flags[prctl_fpemu_mode])

prctl_fpemu_mode = PR_FPEMU_NOPRINT, PR_FPEMU_SIGFPE

prctl$PR_GET_FPEXC(option const[PR_GET_FPEXC], arg ptr[out, int32])
prctl$PR_SET_FPEXC(option const[PR_SET_FPEXC], arg flags[prctl_fpexc_mode])

prctl_fpexc_mode = PR_FP_EXC_SW_ENABLE, PR_FP_EXC_DIV, PR_FP_EXC_OVF, PR_FP_EXC_UND, PR_FP_EXC_RES, PR_FP_EXC_INV, PR_FP_EXC_DISABLED, PR_FP_EXC_NONRECOV, PR_FP_EXC_ASYNC, PR_FP_EXC_PRECISE

# These are not implemented.
_ = PR_GET_TIMING, PR_SET_TIMING

prctl$PR_SET_NAME(option const[PR_SET_NAME], name ptr[in, string])
prctl$PR_GET_NAME(option const[PR_GET_NAME], name ptr[out, array[int8]])

prctl$PR_GET_ENDIAN(option const[PR_GET_ENDIAN], arg ptr[out, int32])
prctl$PR_SET_ENDIAN(option const[PR_SET_ENDIAN], arg flags[prctl_endian_mode])

prctl_endian_mode = PR_ENDIAN_BIG, PR_ENDIAN_LITTLE, PR_ENDIAN_PPC_LITTLE

prctl$PR_GET_SECCOMP(option const[PR_GET_SECCOMP])
prctl$PR_SET_SECCOMP(option const[PR_SET_SECCOMP], mode flags[prctl_seccomp_mode], prog ptr[in, sock_fprog])

prctl_seccomp_mode = SECCOMP_MODE_DISABLED, SECCOMP_MODE_STRICT, SECCOMP_MODE_FILTER

prctl$PR_CAPBSET_READ(option const[PR_CAPBSET_READ], arg int32[0:CAP_LAST_CAP])
prctl$PR_CAPBSET_DROP(option const[PR_CAPBSET_DROP], arg int32[0:CAP_LAST_CAP])

prctl$PR_GET_TSC(option const[PR_GET_TSC], arg ptr[out, int32])
prctl$PR_SET_TSC(option const[PR_SET_TSC], arg flags[prctl_tsc_mode])

prctl_tsc_mode = PR_TSC_ENABLE, PR_TSC_SIGSEGV

prctl$PR_GET_SECUREBITS(option const[PR_GET_SECUREBITS])
prctl$PR_SET_SECUREBITS(option const[PR_SET_SECUREBITS], arg flags[prctl_securebits])

prctl_securebits = SECBIT_NOROOT, SECBIT_NOROOT_LOCKED, SECBIT_NO_SETUID_FIXUP, SECBIT_NO_SETUID_FIXUP_LOCKED, SECBIT_KEEP_CAPS, SECBIT_KEEP_CAPS_LOCKED

prctl$PR_SET_TIMERSLACK(option const[PR_SET_TIMERSLACK], arg intptr)
prctl$PR_GET_TIMERSLACK(option const[PR_GET_TIMERSLACK])

prctl$PR_TASK_PERF_EVENTS_DISABLE(option const[PR_TASK_PERF_EVENTS_DISABLE])
prctl$PR_TASK_PERF_EVENTS_ENABLE(option const[PR_TASK_PERF_EVENTS_ENABLE])

prctl$PR_MCE_KILL(option const[PR_MCE_KILL], arg2 flags[prctl_mce_kill_mode], arg3 flags[prctl_mce_kill_submode])
prctl$PR_MCE_KILL_GET(option const[PR_MCE_KILL_GET])

prctl_mce_kill_mode = PR_MCE_KILL_CLEAR, PR_MCE_KILL_SET
prctl_mce_kill_submode = PR_MCE_KILL_LATE, PR_MCE_KILL_EARLY, PR_MCE_KILL_DEFAULT

prctl$PR_SET_MM(option const[PR_SET_MM], opt flags[prctl_mm_option], arg vma)
prctl$PR_SET_MM_EXE_FILE(option const[PR_SET_MM], opt const[PR_SET_MM_EXE_FILE], arg fd)
prctl$PR_SET_MM_AUXV(option const[PR_SET_MM], opt const[PR_SET_MM_AUXV], arg ptr[in, array[int8]], len bytesize[arg])
prctl$PR_SET_MM_MAP(option const[PR_SET_MM], opt const[PR_SET_MM_MAP], arg ptr[in, prctl_mm_map], len bytesize[arg])
prctl$PR_SET_MM_MAP_SIZE(option const[PR_SET_MM], opt const[PR_SET_MM_MAP_SIZE], arg ptr[out, int32])

prctl_mm_option = PR_SET_MM_START_CODE, PR_SET_MM_END_CODE, PR_SET_MM_START_DATA, PR_SET_MM_END_DATA, PR_SET_MM_START_STACK, PR_SET_MM_START_BRK, PR_SET_MM_BRK, PR_SET_MM_ARG_START, PR_SET_MM_ARG_END, PR_SET_MM_ENV_START, PR_SET_MM_ENV_END

prctl_mm_map {
	start_code	vma64
	end_code	vma64
	start_data	vma64
	end_data	vma64
	start_brk	vma64
	brk		vma64
	start_stack	vma64
	arg_start	vma64
	arg_end		vma64
	env_start	vma64
	env_end		vma64
	auxv		ptr[in, array[int8]]
	auxv_size	bytesize[auxv, int32]
	exe_fd		fd
}

prctl$PR_SET_PTRACER(option const[PR_SET_PTRACER], pid pid)

prctl$PR_SET_CHILD_SUBREAPER(option const[PR_SET_CHILD_SUBREAPER], arg boolptr)
prctl$PR_GET_CHILD_SUBREAPER(option const[PR_GET_CHILD_SUBREAPER])

prctl$PR_SET_NO_NEW_PRIVS(option const[PR_SET_NO_NEW_PRIVS], arg const[1])
prctl$PR_GET_NO_NEW_PRIVS(option const[PR_GET_NO_NEW_PRIVS])

prctl$PR_GET_TID_ADDRESS(option const[PR_GET_TID_ADDRESS], arg ptr[out, intptr])

prctl$PR_SET_THP_DISABLE(option const[PR_SET_THP_DISABLE], arg boolptr)
prctl$PR_GET_THP_DISABLE(option const[PR_GET_THP_DISABLE])

prctl$PR_MPX_ENABLE_MANAGEMENT(option const[PR_MPX_ENABLE_MANAGEMENT])
prctl$PR_MPX_DISABLE_MANAGEMENT(option const[PR_MPX_DISABLE_MANAGEMENT])

prctl$PR_SET_FP_MODE(option const[PR_SET_FP_MODE], arg flags[prctl_fp_mode])
prctl$PR_GET_FP_MODE(option const[PR_GET_FP_MODE])

prctl_fp_mode = PR_FP_MODE_FR, PR_FP_MODE_FRE

prctl$PR_CAP_AMBIENT(option const[PR_CAP_AMBIENT], arg2 flags[prctl_cap_ambient], arg3 int32[0:CAP_LAST_CAP])

prctl_cap_ambient = PR_CAP_AMBIENT_IS_SET, PR_CAP_AMBIENT_RAISE, PR_CAP_AMBIENT_LOWER, PR_CAP_AMBIENT_CLEAR_ALL

prctl$PR_SVE_SET_VL(option const[PR_SVE_SET_VL], arg intptr[0:PR_SVE_SET_VL_ONEXEC])
prctl$PR_SVE_GET_VL(option const[PR_SVE_GET_VL], arg intptr[0:PR_SVE_VL_INHERIT])

prctl$PR_GET_SPECULATION_CTRL(option const[PR_GET_SPECULATION_CTRL], arg2 const[PR_SPEC_STORE_BYPASS], arg3 flags[pr_spec_mode])
prctl$PR_SET_SPECULATION_CTRL(option const[PR_SET_SPECULATION_CTRL], arg2 const[PR_SPEC_STORE_BYPASS])

pr_spec_mode = PR_SPEC_ENABLE, PR_SPEC_DISABLE, PR_SPEC_FORCE_DISABLE

arch_prctl$ARCH_GET_FS(code const[ARCH_GET_FS], arg ptr[out, int64])
arch_prctl$ARCH_GET_GS(code const[ARCH_GET_GS], arg ptr[out, int64])
arch_prctl$ARCH_SET_GS(code const[ARCH_SET_GS], arg int64)
arch_prctl$ARCH_GET_CPUID(code const[ARCH_GET_CPUID])
arch_prctl$ARCH_SET_CPUID(code const[ARCH_SET_CPUID], arg boolptr)
arch_prctl$ARCH_MAP_VDSO_X32(code const[ARCH_MAP_VDSO_X32], arg intptr)
arch_prctl$ARCH_MAP_VDSO_32(code const[ARCH_MAP_VDSO_32], arg intptr)
arch_prctl$ARCH_MAP_VDSO_64(code const[ARCH_MAP_VDSO_64], arg intptr)

_ = ARCH_SET_FS