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net: use libc (not cgo) for DNS on macOS

Browse Source 
Change the macOS implementation to use libc calls.
Using libc calls directly is what we do for all the runtime and os syscalls.
Doing so here as well improves consistency and also makes it possible
to cross-compile (from non-Mac systems) macOS binaries that use the
native name resolver.

Fixes #12524.

Change-Id: I011f4fcc5c50fbb5396e494889765dcbb9342336
Reviewed-on: https://go-review.googlesource.com/c/go/+/446178
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Russ Cox 2022-10-28 10:54:37 -04:00
parent 661e931dd1
commit a3559f3301
11 changed files with 467 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/internal/syscall/unix/asm_darwin.s
View File

@ -6,3 +6,15 @@
TEXT ·libc_getentropy_trampoline(SB),NOSPLIT,$0-0
JMP libc_getentropy(SB)
TEXT ·libc_getaddrinfo_trampoline(SB),NOSPLIT,$0-0
JMP libc_getaddrinfo(SB)
TEXT ·libc_freeaddrinfo_trampoline(SB),NOSPLIT,$0-0
JMP libc_freeaddrinfo(SB)
TEXT ·libc_getnameinfo_trampoline(SB),NOSPLIT,$0-0
JMP libc_getnameinfo(SB)
TEXT ·libc_gai_strerror_trampoline(SB),NOSPLIT,$0-0
JMP libc_gai_strerror(SB)

4
src/internal/syscall/unix/getentropy_darwin.go
View File

@ -8,7 +8,6 @@ package unix
import (
"internal/abi"
"syscall"
"unsafe"
)
@ -27,6 +26,3 @@ func GetEntropy(p []byte) error {
}
return nil
}
//go:linkname syscall_syscall syscall.syscall
func syscall_syscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno)

116
src/internal/syscall/unix/net_darwin.go Normal file
View File

@ -0,0 +1,116 @@
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unix
import (
"internal/abi"
"syscall"
"unsafe"
)
const (
AI_CANONNAME = 0x2
AI_ALL = 0x100
AI_V4MAPPED = 0x800
AI_MASK = 0x1407
EAI_AGAIN = 2
EAI_NONAME = 8
EAI_SYSTEM = 11
EAI_OVERFLOW = 14
NI_NAMEREQD = 4
)
type Addrinfo struct {
Flags int32
Family int32
Socktype int32
Protocol int32
Addrlen uint32
Canonname *byte
Addr *syscall.RawSockaddr
Next *Addrinfo
}
//go:cgo_import_dynamic libc_getaddrinfo getaddrinfo "/usr/lib/libSystem.B.dylib"
func libc_getaddrinfo_trampoline()
func Getaddrinfo(hostname, servname *byte, hints *Addrinfo, res **Addrinfo) (int, error) {
gerrno, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_getaddrinfo_trampoline),
uintptr(unsafe.Pointer(hostname)),
uintptr(unsafe.Pointer(servname)),
uintptr(unsafe.Pointer(hints)),
uintptr(unsafe.Pointer(res)),
0,
0)
var err error
if errno != 0 {
err = errno
}
return int(gerrno), err
}
//go:cgo_import_dynamic libc_freeaddrinfo freeaddrinfo "/usr/lib/libSystem.B.dylib"
func libc_freeaddrinfo_trampoline()
func Freeaddrinfo(ai *Addrinfo) {
syscall_syscall6(abi.FuncPCABI0(libc_freeaddrinfo_trampoline),
uintptr(unsafe.Pointer(ai)),
0, 0, 0, 0, 0)
}
//go:cgo_import_dynamic libc_getnameinfo getnameinfo "/usr/lib/libSystem.B.dylib"
func libc_getnameinfo_trampoline()
func Getnameinfo(sa *syscall.RawSockaddr, salen int, host *byte, hostlen int, serv *byte, servlen int, flags int) (int, error) {
gerrno, _, errno := syscall_syscall9(abi.FuncPCABI0(libc_getnameinfo_trampoline),
uintptr(unsafe.Pointer(sa)),
uintptr(salen),
uintptr(unsafe.Pointer(host)),
uintptr(hostlen),
uintptr(unsafe.Pointer(serv)),
uintptr(servlen),
uintptr(flags),
0,
0)
var err error
if errno != 0 {
err = errno
}
return int(gerrno), err
}
//go:cgo_import_dynamic libc_gai_strerror gai_strerror "/usr/lib/libSystem.B.dylib"
func libc_gai_strerror_trampoline()
func GaiStrerror(ecode int) string {
r1, _, _ := syscall_syscall(abi.FuncPCABI0(libc_gai_strerror_trampoline),
uintptr(ecode),
0, 0)
return GoString((*byte)(unsafe.Pointer(r1)))
}
func GoString(p *byte) string {
if p == nil {
return ""
}
x := unsafe.Slice(p, 1e9)
for i, c := range x {
if c == 0 {
return string(x[:i])
}
}
return ""
}
//go:linkname syscall_syscall syscall.syscall
func syscall_syscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno)
//go:linkname syscall_syscall6 syscall.syscall6
func syscall_syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)
//go:linkname syscall_syscall9 syscall.syscall9
func syscall_syscall9(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)

2
src/net/cgo_resnew.go
View File

@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build cgo && !netgo && (darwin || (linux && !android) || netbsd || solaris)
//go:build cgo && !netgo && ((linux && !android) || netbsd || solaris)
package net

2
src/net/cgo_sockold.go
View File

@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build cgo && !netgo && (aix || darwin || dragonfly || freebsd || netbsd || openbsd)
//go:build cgo && !netgo && (aix || dragonfly || freebsd || netbsd || openbsd)
package net

116
src/net/cgo_unix.go
View File

@ -2,25 +2,15 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This file is called cgo_unix.go, but to allow syscalls-to-libc-based
// implementations to share the code, it does not use cgo directly.
// Instead of C.foo it uses _C_foo, which is defined in either
// cgo_unix_cgo.go or cgo_unix_syscall.go
//go:build cgo && !netgo && unix
package net
/*
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
// If nothing else defined EAI_OVERFLOW, make sure it has a value.
#ifndef EAI_OVERFLOW
#define EAI_OVERFLOW -12
#endif
*/
import "C"
import (
"context"
"syscall"
@ -32,8 +22,8 @@ import (
// by convention.
type addrinfoErrno int
func (eai addrinfoErrno) Error() string { return C.GoString(C.gai_strerror(C.int(eai))) }
func (eai addrinfoErrno) Temporary() bool { return eai == C.EAI_AGAIN }
func (eai addrinfoErrno) Error() string { return _C_gai_strerror(_C_int(eai)) }
func (eai addrinfoErrno) Temporary() bool { return eai == _C_EAI_AGAIN }
func (eai addrinfoErrno) Timeout() bool { return false }
type portLookupResult struct {
@ -61,23 +51,23 @@ func cgoLookupHost(ctx context.Context, name string) (hosts []string, err error,
}
func cgoLookupPort(ctx context.Context, network, service string) (port int, err error, completed bool) {
var hints C.struct_addrinfo
var hints _C_struct_addrinfo
switch network {
case "": // no hints
case "tcp", "tcp4", "tcp6":
hints.ai_socktype = C.SOCK_STREAM
hints.ai_protocol = C.IPPROTO_TCP
*_C_ai_socktype(&hints) = _C_SOCK_STREAM
*_C_ai_protocol(&hints) = _C_IPPROTO_TCP
case "udp", "udp4", "udp6":
hints.ai_socktype = C.SOCK_DGRAM
hints.ai_protocol = C.IPPROTO_UDP
*_C_ai_socktype(&hints) = _C_SOCK_DGRAM
*_C_ai_protocol(&hints) = _C_IPPROTO_UDP
default:
return 0, &DNSError{Err: "unknown network", Name: network + "/" + service}, true
}
switch ipVersion(network) {
case '4':
hints.ai_family = C.AF_INET
*_C_ai_family(&hints) = _C_AF_INET
case '6':
hints.ai_family = C.AF_INET6
*_C_ai_family(&hints) = _C_AF_INET6
}
if ctx.Done() == nil {
port, err := cgoLookupServicePort(&hints, network, service)
@ -95,19 +85,19 @@ func cgoLookupPort(ctx context.Context, network, service string) (port int, err
}
}
func cgoLookupServicePort(hints *C.struct_addrinfo, network, service string) (port int, err error) {
func cgoLookupServicePort(hints *_C_struct_addrinfo, network, service string) (port int, err error) {
cservice := make([]byte, len(service)+1)
copy(cservice, service)
// Lowercase the C service name.
for i, b := range cservice[:len(service)] {
cservice[i] = lowerASCII(b)
}
var res *C.struct_addrinfo
gerrno, err := C.getaddrinfo(nil, (*C.char)(unsafe.Pointer(&cservice[0])), hints, &res)
var res *_C_struct_addrinfo
gerrno, err := _C_getaddrinfo(nil, (*_C_char)(unsafe.Pointer(&cservice[0])), hints, &res)
if gerrno != 0 {
isTemporary := false
switch gerrno {
case C.EAI_SYSTEM:
case _C_EAI_SYSTEM:
if err == nil { // see golang.org/issue/6232
err = syscall.EMFILE
}
@ -117,16 +107,16 @@ func cgoLookupServicePort(hints *C.struct_addrinfo, network, service string) (po
}
return 0, &DNSError{Err: err.Error(), Name: network + "/" + service, IsTemporary: isTemporary}
}
defer C.freeaddrinfo(res)
defer _C_freeaddrinfo(res)
for r := res; r != nil; r = r.ai_next {
switch r.ai_family {
case C.AF_INET:
sa := (*syscall.RawSockaddrInet4)(unsafe.Pointer(r.ai_addr))
for r := res; r != nil; r = *_C_ai_next(r) {
switch *_C_ai_family(r) {
case _C_AF_INET:
sa := (*syscall.RawSockaddrInet4)(unsafe.Pointer(*_C_ai_addr(r)))
p := (*[2]byte)(unsafe.Pointer(&sa.Port))
return int(p[0])<<8 | int(p[1]), nil
case C.AF_INET6:
sa := (*syscall.RawSockaddrInet6)(unsafe.Pointer(r.ai_addr))
case _C_AF_INET6:
sa := (*syscall.RawSockaddrInet6)(unsafe.Pointer(*_C_ai_addr(r)))
p := (*[2]byte)(unsafe.Pointer(&sa.Port))
return int(p[0])<<8 | int(p[1]), nil
}
@ -134,7 +124,7 @@ func cgoLookupServicePort(hints *C.struct_addrinfo, network, service string) (po
return 0, &DNSError{Err: "unknown port", Name: network + "/" + service}
}
func cgoPortLookup(result chan<- portLookupResult, hints *C.struct_addrinfo, network, service string) {
func cgoPortLookup(result chan<- portLookupResult, hints *_C_struct_addrinfo, network, service string) {
port, err := cgoLookupServicePort(hints, network, service)
result <- portLookupResult{port, err}
}
@ -143,29 +133,29 @@ func cgoLookupIPCNAME(network, name string) (addrs []IPAddr, cname string, err e
acquireThread()
defer releaseThread()
var hints C.struct_addrinfo
hints.ai_flags = cgoAddrInfoFlags
hints.ai_socktype = C.SOCK_STREAM
hints.ai_family = C.AF_UNSPEC
var hints _C_struct_addrinfo
*_C_ai_flags(&hints) = cgoAddrInfoFlags
*_C_ai_socktype(&hints) = _C_SOCK_STREAM
*_C_ai_family(&hints) = _C_AF_UNSPEC
switch ipVersion(network) {
case '4':
hints.ai_family = C.AF_INET
*_C_ai_family(&hints) = _C_AF_INET
case '6':
hints.ai_family = C.AF_INET6
*_C_ai_family(&hints) = _C_AF_INET6
}
h := make([]byte, len(name)+1)
copy(h, name)
var res *C.struct_addrinfo
gerrno, err := C.getaddrinfo((*C.char)(unsafe.Pointer(&h[0])), nil, &hints, &res)
var res *_C_struct_addrinfo
gerrno, err := _C_getaddrinfo((*_C_char)(unsafe.Pointer(&h[0])), nil, &hints, &res)
if gerrno != 0 {
isErrorNoSuchHost := false
isTemporary := false
switch gerrno {
case C.EAI_SYSTEM:
case _C_EAI_SYSTEM:
if err == nil {
// err should not be nil, but sometimes getaddrinfo returns
// gerrno == C.EAI_SYSTEM with err == nil on Linux.
// gerrno == _C_EAI_SYSTEM with err == nil on Linux.
// The report claims that it happens when we have too many
// open files, so use syscall.EMFILE (too many open files in system).
// Most system calls would return ENFILE (too many open files),
@ -173,7 +163,7 @@ func cgoLookupIPCNAME(network, name string) (addrs []IPAddr, cname string, err e
// comes up again. golang.org/issue/6232.
err = syscall.EMFILE
}
case C.EAI_NONAME:
case _C_EAI_NONAME:
err = errNoSuchHost
isErrorNoSuchHost = true
default:
@ -183,10 +173,10 @@ func cgoLookupIPCNAME(network, name string) (addrs []IPAddr, cname string, err e
return nil, "", &DNSError{Err: err.Error(), Name: name, IsNotFound: isErrorNoSuchHost, IsTemporary: isTemporary}
}
defer C.freeaddrinfo(res)
defer _C_freeaddrinfo(res)
if res != nil {
cname = C.GoString(res.ai_canonname)
cname = _C_GoString(*_C_ai_canonname(res))
if cname == "" {
cname = name
}
@ -194,18 +184,18 @@ func cgoLookupIPCNAME(network, name string) (addrs []IPAddr, cname string, err e
cname += "."
}
}
for r := res; r != nil; r = r.ai_next {
for r := res; r != nil; r = *_C_ai_next(r) {
// We only asked for SOCK_STREAM, but check anyhow.
if r.ai_socktype != C.SOCK_STREAM {
if *_C_ai_socktype(r) != _C_SOCK_STREAM {
continue
}
switch r.ai_family {
case C.AF_INET:
sa := (*syscall.RawSockaddrInet4)(unsafe.Pointer(r.ai_addr))
switch *_C_ai_family(r) {
case _C_AF_INET:
sa := (*syscall.RawSockaddrInet4)(unsafe.Pointer(*_C_ai_addr(r)))
addr := IPAddr{IP: copyIP(sa.Addr[:])}
addrs = append(addrs, addr)
case C.AF_INET6:
sa := (*syscall.RawSockaddrInet6)(unsafe.Pointer(r.ai_addr))
case _C_AF_INET6:
sa := (*syscall.RawSockaddrInet6)(unsafe.Pointer(*_C_ai_addr(r)))
addr := IPAddr{IP: copyIP(sa.Addr[:]), Zone: zoneCache.name(int(sa.Scope_id))}
addrs = append(addrs, addr)
}
@ -288,7 +278,7 @@ func cgoLookupPTR(ctx context.Context, addr string) (names []string, err error,
}
}
func cgoLookupAddrPTR(addr string, sa *C.struct_sockaddr, salen C.socklen_t) (names []string, err error) {
func cgoLookupAddrPTR(addr string, sa *_C_struct_sockaddr, salen _C_socklen_t) (names []string, err error) {
acquireThread()
defer releaseThread()
@ -297,14 +287,14 @@ func cgoLookupAddrPTR(addr string, sa *C.struct_sockaddr, salen C.socklen_t) (na
for l := nameinfoLen; l <= maxNameinfoLen; l *= 2 {
b = make([]byte, l)
gerrno, err = cgoNameinfoPTR(b, sa, salen)
if gerrno == 0 || gerrno != C.EAI_OVERFLOW {
if gerrno == 0 || gerrno != _C_EAI_OVERFLOW {
break
}
}
if gerrno != 0 {
isTemporary := false
switch gerrno {
case C.EAI_SYSTEM:
case _C_EAI_SYSTEM:
if err == nil { // see golang.org/issue/6232
err = syscall.EMFILE
}
@ -323,17 +313,17 @@ func cgoLookupAddrPTR(addr string, sa *C.struct_sockaddr, salen C.socklen_t) (na
return []string{absDomainName(string(b))}, nil
}
func cgoReverseLookup(result chan<- reverseLookupResult, addr string, sa *C.struct_sockaddr, salen C.socklen_t) {
func cgoReverseLookup(result chan<- reverseLookupResult, addr string, sa *_C_struct_sockaddr, salen _C_socklen_t) {
names, err := cgoLookupAddrPTR(addr, sa, salen)
result <- reverseLookupResult{names, err}
}
func cgoSockaddr(ip IP, zone string) (*C.struct_sockaddr, C.socklen_t) {
func cgoSockaddr(ip IP, zone string) (*_C_struct_sockaddr, _C_socklen_t) {
if ip4 := ip.To4(); ip4 != nil {
return cgoSockaddrInet4(ip4), C.socklen_t(syscall.SizeofSockaddrInet4)
return cgoSockaddrInet4(ip4), _C_socklen_t(syscall.SizeofSockaddrInet4)
}
if ip6 := ip.To16(); ip6 != nil {
return cgoSockaddrInet6(ip6, zoneCache.index(zone)), C.socklen_t(syscall.SizeofSockaddrInet6)
return cgoSockaddrInet6(ip6, zoneCache.index(zone)), _C_socklen_t(syscall.SizeofSockaddrInet6)
}
return nil, 0
}

71
src/net/cgo_unix_cgo.go Normal file
View File

@ -0,0 +1,71 @@
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build cgo && !netgo && unix && !darwin
package net
/*
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
// If nothing else defined EAI_OVERFLOW, make sure it has a value.
#ifndef EAI_OVERFLOW
#define EAI_OVERFLOW -12
#endif
*/
import "C"
const (
_C_AF_INET = C.AF_INET
_C_AF_INET6 = C.AF_INET6
_C_AF_UNSPEC = C.AF_UNSPEC
_C_EAI_AGAIN = C.EAI_AGAIN
_C_EAI_NONAME = C.EAI_NONAME
_C_EAI_OVERFLOW = C.EAI_OVERFLOW
_C_EAI_SYSTEM = C.EAI_SYSTEM
_C_IPPROTO_TCP = C.IPPROTO_TCP
_C_IPPROTO_UDP = C.IPPROTO_UDP
_C_SOCK_DGRAM = C.SOCK_DGRAM
_C_SOCK_STREAM = C.SOCK_STREAM
)
type (
_C_char = C.char
_C_uchar = C.uchar
_C_int = C.int
_C_uint = C.uint
_C_socklen_t = C.socklen_t
_C_struct_addrinfo = C.struct_addrinfo
_C_struct_sockaddr = C.struct_sockaddr
)
func _C_GoString(p *_C_char) string { return C.GoString(p) }
func _C_CString(s string) *_C_char { return C.CString(s) }
func _C_ai_addr(ai *_C_struct_addrinfo) **_C_struct_sockaddr { return &ai.ai_addr }
func _C_ai_addrlen(ai *_C_struct_addrinfo) *_C_uint { return &ai.ai_addrlen }
func _C_ai_canonname(ai *_C_struct_addrinfo) **_C_char { return &ai.ai_canonname }
func _C_ai_family(ai *_C_struct_addrinfo) *_C_int { return &ai.ai_family }
func _C_ai_flags(ai *_C_struct_addrinfo) *_C_int { return &ai.ai_flags }
func _C_ai_next(ai *_C_struct_addrinfo) **_C_struct_addrinfo { return &ai.ai_next }
func _C_ai_protocol(ai *_C_struct_addrinfo) *_C_int { return &ai.ai_protocol }
func _C_ai_socktype(ai *_C_struct_addrinfo) *_C_int { return &ai.ai_socktype }
func _C_freeaddrinfo(ai *_C_struct_addrinfo) {
C.freeaddrinfo(ai)
}
func _C_gai_strerror(eai _C_int) string {
return C.GoString(C.gai_strerror(eai))
}
func _C_getaddrinfo(hostname, servname *_C_char, hints *_C_struct_addrinfo, res **_C_struct_addrinfo) (int, error) {
x, err := C.getaddrinfo(hostname, servname, hints, res)
return int(x), err
}

85
src/net/cgo_unix_syscall.go Normal file
View File

@ -0,0 +1,85 @@
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build cgo && !netgo && darwin
package net
import (
"internal/syscall/unix"
"syscall"
"unsafe"
)
const (
_C_AF_INET = syscall.AF_INET
_C_AF_INET6 = syscall.AF_INET6
_C_AF_UNSPEC = syscall.AF_UNSPEC
_C_EAI_AGAIN = unix.EAI_AGAIN
_C_EAI_NONAME = unix.EAI_NONAME
_C_EAI_OVERFLOW = unix.EAI_OVERFLOW
_C_EAI_SYSTEM = unix.EAI_SYSTEM
_C_IPPROTO_TCP = syscall.IPPROTO_TCP
_C_IPPROTO_UDP = syscall.IPPROTO_UDP
_C_SOCK_DGRAM = syscall.SOCK_DGRAM
_C_SOCK_STREAM = syscall.SOCK_STREAM
)
type (
_C_char = byte
_C_int = int32
_C_uchar = byte
_C_uint = uint32
_C_socklen_t = int
_C_struct_addrinfo = unix.Addrinfo
_C_struct_sockaddr = syscall.RawSockaddr
)
func _C_GoString(p *_C_char) string {
return unix.GoString(p)
}
func _C_CString(s string) *_C_char {
b := make([]byte, len(s)+1)
copy(b, s)
return &b[0]
}
func _C_ai_addr(ai *_C_struct_addrinfo) **_C_struct_sockaddr { return &ai.Addr }
func _C_ai_addrlen(ai *_C_struct_addrinfo) *_C_uint { return &ai.Addrlen }
func _C_ai_canonname(ai *_C_struct_addrinfo) **_C_char { return &ai.Canonname }
func _C_ai_family(ai *_C_struct_addrinfo) *_C_int { return &ai.Family }
func _C_ai_flags(ai *_C_struct_addrinfo) *_C_int { return &ai.Flags }
func _C_ai_next(ai *_C_struct_addrinfo) **_C_struct_addrinfo { return &ai.Next }
func _C_ai_protocol(ai *_C_struct_addrinfo) *_C_int { return &ai.Protocol }
func _C_ai_socktype(ai *_C_struct_addrinfo) *_C_int { return &ai.Socktype }
func _C_freeaddrinfo(ai *_C_struct_addrinfo) {
unix.Freeaddrinfo(ai)
}
func _C_gai_strerror(eai _C_int) string {
return unix.GaiStrerror(int(eai))
}
func _C_getaddrinfo(hostname, servname *byte, hints *_C_struct_addrinfo, res **_C_struct_addrinfo) (int, error) {
return unix.Getaddrinfo(hostname, servname, hints, res)
}
func cgoNameinfoPTR(b []byte, sa *syscall.RawSockaddr, salen int) (int, error) {
gerrno, err := unix.Getnameinfo(sa, salen, &b[0], len(b), nil, 0, unix.NI_NAMEREQD)
return int(gerrno), err
}
func cgoSockaddrInet4(ip IP) *syscall.RawSockaddr {
sa := syscall.RawSockaddrInet4{Len: syscall.SizeofSockaddrInet4, Family: syscall.AF_INET}
copy(sa.Addr[:], ip)
return (*syscall.RawSockaddr)(unsafe.Pointer(&sa))
}
func cgoSockaddrInet6(ip IP, zone int) *syscall.RawSockaddr {
sa := syscall.RawSockaddrInet6{Len: syscall.SizeofSockaddrInet6, Family: syscall.AF_INET6, Scope_id: uint32(zone)}
copy(sa.Addr[:], ip)
return (*syscall.RawSockaddr)(unsafe.Pointer(&sa))
}

13
src/runtime/sys_darwin.go
View File

@ -49,6 +49,17 @@ func syscall_syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
}
func syscall6()
//go:linkname syscall_syscall9 syscall.syscall9
//go:nosplit
//go:cgo_unsafe_args
func syscall_syscall9(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr) {
entersyscall()
libcCall(unsafe.Pointer(abi.FuncPCABI0(syscall9)), unsafe.Pointer(&fn))
exitsyscall()
return
}
func syscall9()
//go:linkname syscall_syscall6X syscall.syscall6X
//go:nosplit
func syscall_syscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
@ -87,7 +98,7 @@ func syscall_rawSyscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintpt
return args.r1, args.r2, args.err
}
// syscallNoErr is used in crypto/x509 to call into Security.framework and CF.
// crypto_x509_syscall is used in crypto/x509/internal/macos to call into Security.framework and CF.
//go:linkname crypto_x509_syscall crypto/x509/internal/macos.syscall
//go:nosplit

59
src/runtime/sys_darwin_amd64.s
View File

@ -839,6 +839,65 @@ ok:
POPQ BP
RET
// syscall9 calls a function in libc on behalf of the syscall package.
// syscall9 takes a pointer to a struct like:
// struct {
// fn uintptr
// a1 uintptr
// a2 uintptr
// a3 uintptr
// a4 uintptr
// a5 uintptr
// a6 uintptr
// a7 uintptr
// a8 uintptr
// a9 uintptr
// r1 uintptr
// r2 uintptr
// err uintptr
// }
// syscall9 must be called on the g0 stack with the
// C calling convention (use libcCall).
//
// syscall9 expects a 32-bit result and tests for 32-bit -1
// to decide there was an error.
TEXT runtime·syscall9(SB),NOSPLIT,$0
PUSHQ BP
MOVQ SP, BP
SUBQ $16, SP
MOVQ (0*8)(DI), R13// fn
MOVQ (2*8)(DI), SI // a2
MOVQ (3*8)(DI), DX // a3
MOVQ (4*8)(DI), CX // a4
MOVQ (5*8)(DI), R8 // a5
MOVQ (6*8)(DI), R9 // a6
MOVQ (7*8)(DI), R10 // a7
MOVQ (8*8)(DI), R11 // a8
MOVQ (9*8)(DI), R12 // a9
MOVQ DI, (SP)
MOVQ (1*8)(DI), DI // a1
XORL AX, AX // vararg: say "no float args"
CALL R13
MOVQ (SP), DI
MOVQ AX, (10*8)(DI) // r1
MOVQ DX, (11*8)(DI) // r2
CMPL AX, $-1
JNE ok
CALL libc_error(SB)
MOVLQSX (AX), AX
MOVQ (SP), DI
MOVQ AX, (12*8)(DI) // err
ok:
XORL AX, AX // no error (it's ignored anyway)
MOVQ BP, SP
POPQ BP
RET
// syscall_x509 is for crypto/x509. It is like syscall6 but does not check for errors,
// takes 5 uintptrs and 1 float64, and only returns one value,
// for use with standard C ABI functions.

57
src/runtime/sys_darwin_arm64.s
View File

@ -669,6 +669,63 @@ TEXT runtime·syscall6X(SB),NOSPLIT,$0
ok:
RET
// syscall9 calls a function in libc on behalf of the syscall package.
// syscall9 takes a pointer to a struct like:
// struct {
// fn uintptr
// a1 uintptr
// a2 uintptr
// a3 uintptr
// a4 uintptr
// a5 uintptr
// a6 uintptr
// a7 uintptr
// a8 uintptr
// a9 uintptr
// r1 uintptr
// r2 uintptr
// err uintptr
// }
// syscall9 must be called on the g0 stack with the
// C calling convention (use libcCall).
TEXT runtime·syscall9(SB),NOSPLIT,$0
SUB $16, RSP // push structure pointer
MOVD R0, 8(RSP)
MOVD 0(R0), R12 // fn
MOVD 16(R0), R1 // a2
MOVD 24(R0), R2 // a3
MOVD 32(R0), R3 // a4
MOVD 40(R0), R4 // a5
MOVD 48(R0), R5 // a6
MOVD 56(R0), R6 // a7
MOVD 64(R0), R7 // a8
MOVD 72(R0), R8 // a9
MOVD 8(R0), R0 // a1
// If fn is declared as vararg, we have to pass the vararg arguments on the stack.
// See syscall above. The only function this applies to is openat, for which the 4th
// arg must be on the stack.
MOVD R3, (RSP)
BL (R12)
MOVD 8(RSP), R2 // pop structure pointer
ADD $16, RSP
MOVD R0, 80(R2) // save r1
MOVD R1, 88(R2) // save r2
CMPW $-1, R0
BNE ok
SUB $16, RSP // push structure pointer
MOVD R2, 8(RSP)
BL libc_error(SB)
MOVW (R0), R0
MOVD 8(RSP), R2 // pop structure pointer
ADD $16, RSP
MOVD R0, 96(R2) // save err
ok:
RET
// syscall_x509 is for crypto/x509. It is like syscall6 but does not check for errors,
// takes 5 uintptrs and 1 float64, and only returns one value,
// for use with standard C ABI functions.