modernc.org/memory@v1.8.0/mmap_linux_s390x.go (about)

     1  // Copyright 2009 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE-GO file.
     4  
     5  package memory
     6  
     7  import (
     8  	"syscall"
     9  	"unsafe"
    10  )
    11  
    12  // https://cs.opensource.google/go/go/+/refs/tags/go1.17.8:src/syscall/syscall_linux_s390x.go;l=105-115
    13  // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
    14  // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
    15  func mmapSyscall(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
    16  	mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)}
    17  	r0, _, e1 := syscall.Syscall(syscall.SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0)
    18  	xaddr = uintptr(r0)
    19  	if e1 != 0 {
    20  		err = e1
    21  	}
    22  	return
    23  }