// to kill or tgkill.
//
//go:nosplit
func (c *sigctxt) sigFromUser() bool {
	code := int32(c.sigcode())
	return code == _SI_USER || code == _SI_TKILL
}

//go:nosplit
func mprotect(addr unsafe.Pointer, n uintptr, prot int32) (ret int32, errno int32) {
	r, _, err := syscall.Syscall6(syscall.SYS_MPROTECT, uintptr(addr), n, uintptr(prot), 0, 0, 0)
	return int32(r), int32(err)

	SYS_SSTK                     = 70  // { int sstk(int incr); }
	SYS_MUNMAP                   = 73  // { int munmap(void *addr, size_t len); }
	SYS_MPROTECT                 = 74  // { int mprotect(void *addr, size_t len, int prot); }
	SYS_MADVISE                  = 75  // { int madvise(void *addr, size_t len, int behav); }
	SYS_MINCORE                  = 78  // { int mincore(const void *addr, size_t len, char *vec); }

	SYS_SSTK                     = 70  // { int sstk(int incr); }
	SYS_MUNMAP                   = 73  // { int munmap(void *addr, size_t len); }
	SYS_MPROTECT                 = 74  // { int mprotect(void *addr, size_t len, int prot); }
	SYS_MADVISE                  = 75  // { int madvise(void *addr, size_t len, int behav); }
	SYS_MINCORE                  = 78  // { int mincore(const void *addr, size_t len, char *vec); }

//sys	Mknod(path string, mode uint32, dev int) (err error)
//sys	Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
//sys	Mlock(b []byte) (err error)
//sys	Mlockall(flags int) (err error)
//sys	Mprotect(b []byte, prot int) (err error)
//sys	Msync(b []byte, flags int) (err error)
//sys	Munlock(b []byte) (err error)
//sys	Munlockall() (err error)
//sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)

	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Mprotect(b []byte, prot int) (err error) {
	var _p0 unsafe.Pointer
	if len(b) > 0 {
		_p0 = unsafe.Pointer(&b[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

	_, e1 := callmadvise(uintptr(unsafe.Pointer(_p0)), len(b), advice)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Mprotect(b []byte, prot int) (err error) {
	var _p0 *byte
	if len(b) > 0 {
		_p0 = &b[0]
	}
	_, e1 := callmprotect(uintptr(unsafe.Pointer(_p0)), len(b), prot)
	if e1 != 0 {
		err = errnoErr(e1)
	}

	_, _, e1 := Syscall(SYS_MLOCKALL, uintptr(flags), 0, 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Mprotect(b []byte, prot int) (err error) {
	var _p0 unsafe.Pointer
	if len(b) > 0 {
		_p0 = unsafe.Pointer(&b[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Mprotect(b []byte, prot int) (err error) {
	var _p0 unsafe.Pointer
	if len(b) > 0 {
		_p0 = unsafe.Pointer(&b[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

//go:cgo_import_dynamic libc_nsendmsg nsendmsg "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_munmap munmap "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_madvise madvise "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_mprotect mprotect "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_mlock mlock "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_mlockall mlockall "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_msync msync "libc.a/shr_64.o"

	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Mprotect(b []byte, prot int) (err error) {
	var _p0 unsafe.Pointer
	if len(b) > 0 {
		_p0 = unsafe.Pointer(&b[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}