//go:linkname syscall_syscall6 syscall.syscall6
func syscall_syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)

func libc_faccessat_trampoline()

//go:cgo_import_dynamic libc_faccessat faccessat "libc.so"

func faccessat(dirfd int, path string, mode uint32, flags int) error {
	p, err := syscall.BytePtrFromString(path)
	if err != nil {
		return err
	}

// Test that C.malloc does not return nil.

package main

// #include <stdlib.h>
import "C"

import (
	"fmt"
	"runtime"
)

func main() {
	var size C.size_t
	size--

	// The Dragonfly libc succeeds when asked to allocate
	// 0xffffffffffffffff bytes, so pass a different value that
	// causes it to fail.
	if runtime.GOOS == "dragonfly" {
		size = C.size_t(0x7fffffff << (32 * (^uintptr(0) >> 63)))
	}

	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
openbsd_386)
	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
	mkerrors="$mkerrors -m32"
	mksyscall="./mksyscall.pl -l32 -openbsd -libc"
	mksysctl="./mksysctl_openbsd.pl"
	zsysctl="zsysctl_openbsd.go"
	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"

package runtime

import (
	"internal/abi"
	"unsafe"
)

// The X versions of syscall expect the libc call to return a 64-bit result.
// Otherwise (the non-X version) expects a 32-bit result.
// This distinction is required because an error is indicated by returning -1,
// and we need to know whether to check 32 or 64 bits of the result.
// (Some libc functions that return 32 bits put junk in the upper 32 bits of AX.)

//go:build dragonfly

package cgo

import _ "unsafe" // for go:linkname

// Supply environ and __progname, because we don't
// link against the standard DragonFly crt0.o and the
// libc dynamic library needs them.

//go:linkname _environ environ
//go:linkname _progname __progname

var _environ uintptr

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

// This program hung when run under the C/C++ ThreadSanitizer. TSAN installs a
// libc interceptor that writes signal handlers to a global variable within the
// TSAN runtime instead of making a sigaction system call. A bug in
// syscall.runtime_AfterForkInChild corrupted TSAN's signal forwarding table

//go:build illumos

package syscall

import "unsafe"

// F_DUP2FD_CLOEXEC has different values on Solaris and Illumos.
const F_DUP2FD_CLOEXEC = 0x24

//go:cgo_import_dynamic libc_flock flock "libc.so"

//go:linkname procFlock libc_flock

var procFlock libcFunc

func Flock(fd int, how int) error {
	_, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procFlock)), 2, uintptr(fd), uintptr(how), 0, 0, 0, 0)

// (See golang.org/issue/32102)

//go:build aix && ppc64 && gc

package cpu

import (
	"syscall"
	"unsafe"
)

//go:cgo_import_dynamic libc_getsystemcfg getsystemcfg "libc.a/shr_64.o"

//go:linkname libc_getsystemcfg libc_getsystemcfg

type syscallFunc uintptr

var libc_getsystemcfg syscallFunc

type errno = syscall.Errno

// Implemented in runtime/syscall_aix.go.

// license that can be found in the LICENSE file.

package unix

import (
	"sync/atomic"
	"syscall"
	"unsafe"
)

//go:cgo_import_dynamic libc_getrandom getrandom "libc.so"

//go:linkname procGetrandom libc_getrandom

var procGetrandom uintptr

var getrandomUnsupported atomic.Bool

// GetRandomFlag is a flag supported by the getrandom system call.
type GetRandomFlag uintptr

	// packages make use of syscall.Syscall with SYS_IOCTL since it is
	// not well supported by golang.org/x/sys/unix. Reroute this system
	// call number to the respective libc stub so that it continues to
	// work for the time being. See #63900 for further details.
	if trap == SYS_IOCTL {
		return syscallX(abi.FuncPCABI0(libc_ioctl_trampoline), a1, a2, a3)
	}
	return 0, 0, ENOSYS
}