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cmd/link,runtime: move syscalls to libc on iOS

Browse Source 
This CL is the darwin/arm and darwin/arm64 equivalent to CL 108679,
110215, 110437, 110438, 111258, 110655.

Updates #17490

Change-Id: Ia95b27b38f9c3535012c566f17a44b4ed26b9db6
Reviewed-on: https://go-review.googlesource.com/111015
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Elias Naur 2018-05-01 10:48:19 +02:00
parent 467e15accc
commit c8d07295c5
18 changed files with 290 additions and 1002 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/cmd/link/internal/arm/asm.go
View File

@ -229,6 +229,10 @@ func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
switch r.Type {
case objabi.R_CALLARM:
if ctxt.LinkMode == ld.LinkExternal {
// External linker will do this relocation.
return true
}
addpltsym(ctxt, targ)
r.Sym = ctxt.Syms.Lookup(".plt", 0)
r.Add = int64(targ.Plt)

19
src/cmd/link/internal/arm64/asm.go
View File

@ -92,8 +92,25 @@ func gentext(ctxt *ld.Link) {
initarray_entry.AddAddr(ctxt.Arch, initfunc)
}
// adddynrel implements just enough to support external linking to
// the system libc functions used by the runtime.
func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
log.Fatalf("adddynrel not implemented")
targ := r.Sym
switch r.Type {
case objabi.R_CALL,
objabi.R_PCREL,
objabi.R_CALLARM64:
if targ.Type != sym.SDYNIMPORT {
// nothing to do, the relocation will be laid out in reloc
return true
}
if ctxt.LinkMode == ld.LinkExternal {
// External linker will do this relocation.
return true
}
}
log.Fatalf("adddynrel not implemented for relocation type %d (%s)", r.Type, sym.RelocName(ctxt.Arch, r.Type))
return false
}

1
src/cmd/vet/all/whitelist/darwin_arm.txt
View File

@ -8,5 +8,4 @@ runtime/sys_darwin_arm.s: [arm] sigfwd: use of unnamed argument 0(FP); offset 0
// Ok.
runtime/sys_darwin_arm.s: [arm] bsdthread_start: function bsdthread_start missing Go declaration
runtime/asm_arm.s: [arm] sigreturn: function sigreturn missing Go declaration

3
src/cmd/vet/all/whitelist/darwin_arm64.txt
View File

@ -2,7 +2,4 @@
runtime/sys_darwin_arm64.s: [arm64] sigtramp: 24(RSP) should be infostyle+8(FP)
runtime/sys_darwin_arm64.s: [arm64] sigtramp: 24(RSP) should be infostyle+8(FP)
runtime/sys_darwin_arm64.s: [arm64] bsdthread_create: RET without writing to 4-byte ret+24(FP)
runtime/sys_darwin_arm64.s: [arm64] bsdthread_start: function bsdthread_start missing Go declaration
runtime/sys_darwin_arm64.s: [arm64] bsdthread_register: RET without writing to 4-byte ret+0(FP)
runtime/asm_arm64.s: [arm64] sigreturn: function sigreturn missing Go declaration

7
src/runtime/asm_arm.s
View File

@ -588,9 +588,12 @@ TEXT ·asmcgocall(SB),NOSPLIT,$0-12
// We get called to create new OS threads too, and those
// come in on the m->g0 stack already.
MOVW g_m(g), R8
MOVW m_gsignal(R8), R3
CMP R3, g
BEQ noswitch
MOVW m_g0(R8), R3
CMP R3, g
BEQ g0
BEQ noswitch
BL gosave<>(SB)
MOVW R0, R5
MOVW R3, R0
@ -599,7 +602,7 @@ TEXT ·asmcgocall(SB),NOSPLIT,$0-12
MOVW (g_sched+gobuf_sp)(g), R13
// Now on a scheduling stack (a pthread-created stack).
g0:
noswitch:
SUB $24, R13
BIC $0x7, R13 // alignment for gcc ABI
MOVW R4, 20(R13) // save old g

8
src/runtime/asm_arm64.s
View File

@ -869,9 +869,12 @@ TEXT ·asmcgocall(SB),NOSPLIT,$0-20
// We get called to create new OS threads too, and those
// come in on the m->g0 stack already.
MOVD g_m(g), R8
MOVD m_gsignal(R8), R3
CMP R3, g
BEQ noswitch
MOVD m_g0(R8), R3
CMP R3, g
BEQ g0
BEQ noswitch
MOVD R0, R9 // gosave<> and save_g might clobber R0
BL gosave<>(SB)
MOVD R3, g
@ -881,11 +884,12 @@ TEXT ·asmcgocall(SB),NOSPLIT,$0-20
MOVD R9, R0
// Now on a scheduling stack (a pthread-created stack).
g0:
noswitch:
// Save room for two of our pointers /*, plus 32 bytes of callee
// save area that lives on the caller stack. */
MOVD RSP, R13
SUB $16, R13
BIC $0xf, R13 // alignment for gcc ABI
MOVD R13, RSP
MOVD R4, 0(RSP) // save old g on stack
MOVD (g_stack+stack_hi)(R4), R4

5
src/runtime/defs_darwin_arm.go
View File

@ -258,3 +258,8 @@ type pthreadattr struct {
X__sig int32
X__opaque [36]int8
}
type machTimebaseInfo struct {
numer uint32
denom uint32
}

5
src/runtime/defs_darwin_arm64.go
View File

@ -261,3 +261,8 @@ type pthreadattr struct {
X__sig int64
X__opaque [56]int8
}
type machTimebaseInfo struct {
numer uint32
denom uint32
}

3
src/runtime/mmap.go
View File

@ -9,8 +9,7 @@
// +build !linux !amd64
// +build !linux !arm64
// +build !js
// +build !darwin !amd64
// +build !darwin !386
// +build !darwin
package runtime

2
src/runtime/os_darwin.go
View File

@ -2,8 +2,6 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build 386 amd64
package runtime
import "unsafe"

593
src/runtime/os_darwin_raw.go
View File

@ -1,593 +0,0 @@
// Copyright 2009 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.
// +build darwin,arm darwin,arm64
// TODO(khr): move darwin/arm and darwin/arm64 over to calling libc instead of using raw system calls.
package runtime
import "unsafe"
type mOS struct {
machport uint32 // return address for mach ipc
waitsema uint32 // semaphore for parking on locks
}
var darwinVersion int
func bsdthread_create(stk, arg unsafe.Pointer, fn uintptr) int32
func bsdthread_register() int32
//go:noescape
func mach_msg_trap(h unsafe.Pointer, op int32, send_size, rcv_size, rcv_name, timeout, notify uint32) int32
func mach_reply_port() uint32
func mach_task_self() uint32
func mach_thread_self() uint32
//go:noescape
func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32
func unimplemented(name string) {
println(name, "not implemented")
*(*int)(unsafe.Pointer(uintptr(1231))) = 1231
}
//go:nosplit
func semawakeup(mp *m) {
mach_semrelease(mp.waitsema)
}
//go:nosplit
func semacreate(mp *m) {
if mp.waitsema != 0 {
return
}
systemstack(func() {
mp.waitsema = mach_semcreate()
})
}
// BSD interface for threading.
func osinit() {
// bsdthread_register delayed until end of goenvs so that we
// can look at the environment first.
ncpu = getncpu()
physPageSize = getPageSize()
darwinVersion = getDarwinVersion()
}
const (
_CTL_KERN = 1
_CTL_HW = 6
_KERN_OSRELEASE = 2
_HW_NCPU = 3
_HW_PAGESIZE = 7
)
func getDarwinVersion() int {
// Use sysctl to fetch kern.osrelease
mib := [2]uint32{_CTL_KERN, _KERN_OSRELEASE}
var out [32]byte
nout := unsafe.Sizeof(out)
ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
if ret >= 0 {
ver := 0
for i := 0; i < int(nout) && out[i] >= '0' && out[i] <= '9'; i++ {
ver *= 10
ver += int(out[i] - '0')
}
return ver
}
return 17 // should not happen: default to a newish version
}
func getncpu() int32 {
// Use sysctl to fetch hw.ncpu.
mib := [2]uint32{_CTL_HW, _HW_NCPU}
out := uint32(0)
nout := unsafe.Sizeof(out)
ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
if ret >= 0 && int32(out) > 0 {
return int32(out)
}
return 1
}
func getPageSize() uintptr {
// Use sysctl to fetch hw.pagesize.
mib := [2]uint32{_CTL_HW, _HW_PAGESIZE}
out := uint32(0)
nout := unsafe.Sizeof(out)
ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
if ret >= 0 && int32(out) > 0 {
return uintptr(out)
}
return 0
}
var urandom_dev = []byte("/dev/urandom\x00")
//go:nosplit
func getRandomData(r []byte) {
fd := open(&urandom_dev[0], 0 /* O_RDONLY */, 0)
n := read(fd, unsafe.Pointer(&r[0]), int32(len(r)))
closefd(fd)
extendRandom(r, int(n))
}
func goenvs() {
goenvs_unix()
// Register our thread-creation callback (see sys_darwin_{amd64,386}.s)
// but only if we're not using cgo. If we are using cgo we need
// to let the C pthread library install its own thread-creation callback.
if !iscgo {
if bsdthread_register() != 0 {
if gogetenv("DYLD_INSERT_LIBRARIES") != "" {
throw("runtime: bsdthread_register error (unset DYLD_INSERT_LIBRARIES)")
}
throw("runtime: bsdthread_register error")
}
}
}
// May run with m.p==nil, so write barriers are not allowed.
//go:nowritebarrier
func newosproc(mp *m) {
stk := unsafe.Pointer(mp.g0.stack.hi)
if false {
print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n")
}
var oset sigset
sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
errno := bsdthread_create(stk, unsafe.Pointer(mp), funcPC(mstart))
sigprocmask(_SIG_SETMASK, &oset, nil)
if errno < 0 {
print("runtime: failed to create new OS thread (have ", mcount(), " already; errno=", -errno, ")\n")
throw("runtime.newosproc")
}
}
// newosproc0 is a version of newosproc that can be called before the runtime
// is initialized.
//
// As Go uses bsdthread_register when running without cgo, this function is
// not safe to use after initialization as it does not pass an M as fnarg.
//
//go:nosplit
func newosproc0(stacksize uintptr, fn uintptr) {
stack := sysAlloc(stacksize, &memstats.stacks_sys)
if stack == nil {
write(2, unsafe.Pointer(&failallocatestack[0]), int32(len(failallocatestack)))
exit(1)
}
stk := unsafe.Pointer(uintptr(stack) + stacksize)
var oset sigset
sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
errno := bsdthread_create(stk, nil, fn)
sigprocmask(_SIG_SETMASK, &oset, nil)
if errno < 0 {
write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate)))
exit(1)
}
}
var failallocatestack = []byte("runtime: failed to allocate stack for the new OS thread\n")
var failthreadcreate = []byte("runtime: failed to create new OS thread\n")
// Called to do synchronous initialization of Go code built with
// -buildmode=c-archive or -buildmode=c-shared.
// None of the Go runtime is initialized.
//go:nosplit
//go:nowritebarrierrec
func libpreinit() {
initsig(true)
}
// Called to initialize a new m (including the bootstrap m).
// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
func mpreinit(mp *m) {
mp.gsignal = malg(32 * 1024) // OS X wants >= 8K
mp.gsignal.m = mp
}
// Called to initialize a new m (including the bootstrap m).
// Called on the new thread, cannot allocate memory.
func minit() {
// The alternate signal stack is buggy on arm and arm64.
// The signal handler handles it directly.
// The sigaltstack assembly function does nothing.
if GOARCH != "arm" && GOARCH != "arm64" {
minitSignalStack()
}
minitSignalMask()
}
// Called from dropm to undo the effect of an minit.
//go:nosplit
func unminit() {
// The alternate signal stack is buggy on arm and arm64.
// See minit.
if GOARCH != "arm" && GOARCH != "arm64" {
unminitSignals()
}
}
// Mach IPC, to get at semaphores
// Definitions are in /usr/include/mach on a Mac.
func macherror(r int32, fn string) {
print("mach error ", fn, ": ", r, "\n")
throw("mach error")
}
const _DebugMach = false
var zerondr machndr
func mach_msgh_bits(a, b uint32) uint32 {
return a | b<<8
}
func mach_msg(h *machheader, op int32, send_size, rcv_size, rcv_name, timeout, notify uint32) int32 {
// TODO: Loop on interrupt.
return mach_msg_trap(unsafe.Pointer(h), op, send_size, rcv_size, rcv_name, timeout, notify)
}
// Mach RPC (MIG)
const (
_MinMachMsg = 48
_MachReply = 100
)
type codemsg struct {
h machheader
ndr machndr
code int32
}
func machcall(h *machheader, maxsize int32, rxsize int32) int32 {
_g_ := getg()
port := _g_.m.machport
if port == 0 {
port = mach_reply_port()
_g_.m.machport = port
}
h.msgh_bits |= mach_msgh_bits(_MACH_MSG_TYPE_COPY_SEND, _MACH_MSG_TYPE_MAKE_SEND_ONCE)
h.msgh_local_port = port
h.msgh_reserved = 0
id := h.msgh_id
if _DebugMach {
p := (*[10000]unsafe.Pointer)(unsafe.Pointer(h))
print("send:\t")
var i uint32
for i = 0; i < h.msgh_size/uint32(unsafe.Sizeof(p[0])); i++ {
print(" ", p[i])
if i%8 == 7 {
print("\n\t")
}
}
if i%8 != 0 {
print("\n")
}
}
ret := mach_msg(h, _MACH_SEND_MSG|_MACH_RCV_MSG, h.msgh_size, uint32(maxsize), port, 0, 0)
if ret != 0 {
if _DebugMach {
print("mach_msg error ", ret, "\n")
}
return ret
}
if _DebugMach {
p := (*[10000]unsafe.Pointer)(unsafe.Pointer(h))
var i uint32
for i = 0; i < h.msgh_size/uint32(unsafe.Sizeof(p[0])); i++ {
print(" ", p[i])
if i%8 == 7 {
print("\n\t")
}
}
if i%8 != 0 {
print("\n")
}
}
if h.msgh_id != id+_MachReply {
if _DebugMach {
print("mach_msg _MachReply id mismatch ", h.msgh_id, " != ", id+_MachReply, "\n")
}
return -303 // MIG_REPLY_MISMATCH
}
// Look for a response giving the return value.
// Any call can send this back with an error,
// and some calls only have return values so they
// send it back on success too. I don't quite see how
// you know it's one of these and not the full response
// format, so just look if the message is right.
c := (*codemsg)(unsafe.Pointer(h))
if uintptr(h.msgh_size) == unsafe.Sizeof(*c) && h.msgh_bits&_MACH_MSGH_BITS_COMPLEX == 0 {
if _DebugMach {
print("mig result ", c.code, "\n")
}
return c.code
}
if h.msgh_size != uint32(rxsize) {
if _DebugMach {
print("mach_msg _MachReply size mismatch ", h.msgh_size, " != ", rxsize, "\n")
}
return -307 // MIG_ARRAY_TOO_LARGE
}
return 0
}
// Semaphores!
const (
tmach_semcreate = 3418
rmach_semcreate = tmach_semcreate + _MachReply
tmach_semdestroy = 3419
rmach_semdestroy = tmach_semdestroy + _MachReply
_KERN_ABORTED = 14
_KERN_OPERATION_TIMED_OUT = 49
)
type tmach_semcreatemsg struct {
h machheader
ndr machndr
policy int32
value int32
}
type rmach_semcreatemsg struct {
h machheader
body machbody
semaphore machport
}
type tmach_semdestroymsg struct {
h machheader
body machbody
semaphore machport
}
func mach_semcreate() uint32 {
var m [256]uint8
tx := (*tmach_semcreatemsg)(unsafe.Pointer(&m))
rx := (*rmach_semcreatemsg)(unsafe.Pointer(&m))
tx.h.msgh_bits = 0
tx.h.msgh_size = uint32(unsafe.Sizeof(*tx))
tx.h.msgh_remote_port = mach_task_self()
tx.h.msgh_id = tmach_semcreate
tx.ndr = zerondr
tx.policy = 0 // 0 = SYNC_POLICY_FIFO
tx.value = 0
for {
r := machcall(&tx.h, int32(unsafe.Sizeof(m)), int32(unsafe.Sizeof(*rx)))
if r == 0 {
break
}
if r == _KERN_ABORTED { // interrupted
continue
}
macherror(r, "semaphore_create")
}
if rx.body.msgh_descriptor_count != 1 {
unimplemented("mach_semcreate desc count")
}
return rx.semaphore.name
}
func mach_semdestroy(sem uint32) {
var m [256]uint8
tx := (*tmach_semdestroymsg)(unsafe.Pointer(&m))
tx.h.msgh_bits = _MACH_MSGH_BITS_COMPLEX
tx.h.msgh_size = uint32(unsafe.Sizeof(*tx))
tx.h.msgh_remote_port = mach_task_self()
tx.h.msgh_id = tmach_semdestroy
tx.body.msgh_descriptor_count = 1
tx.semaphore.name = sem
tx.semaphore.disposition = _MACH_MSG_TYPE_MOVE_SEND
tx.semaphore._type = 0
for {
r := machcall(&tx.h, int32(unsafe.Sizeof(m)), 0)
if r == 0 {
break
}
if r == _KERN_ABORTED { // interrupted
continue
}
macherror(r, "semaphore_destroy")
}
}
// The other calls have simple system call traps in sys_darwin_{amd64,386}.s
func mach_semaphore_wait(sema uint32) int32
func mach_semaphore_timedwait(sema, sec, nsec uint32) int32
func mach_semaphore_signal(sema uint32) int32
func mach_semaphore_signal_all(sema uint32) int32
func semasleep1(ns int64) int32 {
_g_ := getg()
if ns >= 0 {
var nsecs int32
secs := timediv(ns, 1000000000, &nsecs)
r := mach_semaphore_timedwait(_g_.m.waitsema, uint32(secs), uint32(nsecs))
if r == _KERN_ABORTED || r == _KERN_OPERATION_TIMED_OUT {
return -1
}
if r != 0 {
macherror(r, "semaphore_wait")
}
return 0
}
for {
r := mach_semaphore_wait(_g_.m.waitsema)
if r == 0 {
break
}
// Note: We don't know how this call (with no timeout) can get _KERN_OPERATION_TIMED_OUT,
// but it does reliably, though at a very low rate, on OS X 10.8, 10.9, 10.10, and 10.11.
// See golang.org/issue/17161.
if r == _KERN_ABORTED || r == _KERN_OPERATION_TIMED_OUT { // interrupted
continue
}
macherror(r, "semaphore_wait")
}
return 0
}
//go:nosplit
func semasleep(ns int64) int32 {
var r int32
systemstack(func() {
r = semasleep1(ns)
})
return r
}
//go:nosplit
func mach_semrelease(sem uint32) {
for {
r := mach_semaphore_signal(sem)
if r == 0 {
break
}
if r == _KERN_ABORTED { // interrupted
continue
}
// mach_semrelease must be completely nosplit,
// because it is called from Go code.
// If we're going to die, start that process on the system stack
// to avoid a Go stack split.
systemstack(func() { macherror(r, "semaphore_signal") })
}
}
//go:nosplit
func osyield() {
usleep(1)
}
const (
_NSIG = 32
_SI_USER = 0 /* empirically true, but not what headers say */
_SIG_BLOCK = 1
_SIG_UNBLOCK = 2
_SIG_SETMASK = 3
_SS_DISABLE = 4
)
//go:noescape
func sigprocmask(how int32, new, old *sigset)
//go:noescape
func sigaction(mode uint32, new *sigactiont, old *usigactiont)
//go:noescape
func sigaltstack(new, old *stackt)
// darwin/arm64 uses registers instead of stack-based arguments.
// TODO: does this matter?
func sigtramp(fn uintptr, infostyle, sig uint32, info *siginfo, ctx unsafe.Pointer)
//go:noescape
func setitimer(mode int32, new, old *itimerval)
func raise(sig uint32)
func raiseproc(sig uint32)
//extern SigTabTT runtime·sigtab[];
type sigset uint32
var sigset_all = ^sigset(0)
//go:nosplit
//go:nowritebarrierrec
func setsig(i uint32, fn uintptr) {
var sa sigactiont
sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK | _SA_RESTART
sa.sa_mask = ^uint32(0)
sa.sa_tramp = unsafe.Pointer(funcPC(sigtramp)) // runtime·sigtramp's job is to call into real handler
*(*uintptr)(unsafe.Pointer(&sa.__sigaction_u)) = fn
sigaction(i, &sa, nil)
}
//go:nosplit
//go:nowritebarrierrec
func setsigstack(i uint32) {
var osa usigactiont
sigaction(i, nil, &osa)
handler := *(*uintptr)(unsafe.Pointer(&osa.__sigaction_u))
if osa.sa_flags&_SA_ONSTACK != 0 {
return
}
var sa sigactiont
*(*uintptr)(unsafe.Pointer(&sa.__sigaction_u)) = handler
sa.sa_tramp = unsafe.Pointer(funcPC(sigtramp))
sa.sa_mask = osa.sa_mask
sa.sa_flags = osa.sa_flags | _SA_ONSTACK
sigaction(i, &sa, nil)
}
//go:nosplit
//go:nowritebarrierrec
func getsig(i uint32) uintptr {
var sa usigactiont
sigaction(i, nil, &sa)
return *(*uintptr)(unsafe.Pointer(&sa.__sigaction_u))
}
// setSignaltstackSP sets the ss_sp field of a stackt.
//go:nosplit
func setSignalstackSP(s *stackt, sp uintptr) {
*(*uintptr)(unsafe.Pointer(&s.ss_sp)) = sp
}
//go:nosplit
//go:nowritebarrierrec
func sigaddset(mask *sigset, i int) {
*mask |= 1 << (uint32(i) - 1)
}
func sigdelset(mask *sigset, i int) {
*mask &^= 1 << (uint32(i) - 1)
}
//go:linkname executablePath os.executablePath
var executablePath string
func sysargs(argc int32, argv **byte) {
// skip over argv, envv and the first string will be the path
n := argc + 1
for argv_index(argv, n) != nil {
n++
}
executablePath = gostringnocopy(argv_index(argv, n+1))
// strip "executable_path=" prefix if available, it's added after OS X 10.11.
const prefix = "executable_path="
if len(executablePath) > len(prefix) && executablePath[:len(prefix)] == prefix {
executablePath = executablePath[len(prefix):]
}
}

4
src/runtime/proc.go
View File

@ -1201,7 +1201,7 @@ func mstart() {
mstart1()
// Exit this thread.
if GOOS == "windows" || GOOS == "solaris" || GOOS == "plan9" || (GOOS == "darwin" && (GOARCH == "amd64" || GOARCH == "386")) {
if GOOS == "windows" || GOOS == "solaris" || GOOS == "plan9" || GOOS == "darwin" {
// Window, Solaris, Darwin and Plan 9 always system-allocate
// the stack, but put it in _g_.stack before mstart,
// so the logic above hasn't set osStack yet.
@ -1525,7 +1525,7 @@ func allocm(_p_ *p, fn func()) *m {
// In case of cgo or Solaris or Darwin, pthread_create will make us a stack.
// Windows and Plan 9 will layout sched stack on OS stack.
if iscgo || GOOS == "solaris" || GOOS == "windows" || GOOS == "plan9" || (GOOS == "darwin" && (GOARCH == "386" || GOARCH == "amd64")) {
if iscgo || GOOS == "solaris" || GOOS == "windows" || GOOS == "plan9" || GOOS == "darwin" {
mp.g0 = malg(-1)
} else {
mp.g0 = malg(8192 * sys.StackGuardMultiplier)

3
src/runtime/stubs2.go
View File

@ -7,8 +7,7 @@
// +build !windows
// +build !nacl
// +build !js
// +build !darwin !amd64
// +build !darwin !386
// +build !darwin
package runtime

9
src/runtime/stubs4.go
View File

@ -1,9 +0,0 @@
// Copyright 2018 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.
// +build darwin,arm darwin,arm64
package runtime
func nanotime() int64

2
src/runtime/sys_darwin.go
View File

@ -2,8 +2,6 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin,386 darwin,amd64
package runtime
import "unsafe"

328
src/runtime/sys_darwin_arm.s
View File

@ -11,27 +11,14 @@
#include "textflag.h"
// Copied from /usr/include/sys/syscall.h
#define SYS_exit 1
#define SYS_read 3
#define SYS_write 4
#define SYS_open 5
#define SYS_close 6
#define SYS_mmap 197
#define SYS_munmap 73
#define SYS_madvise 75
#define SYS_gettimeofday 116
#define SYS_kill 37
#define SYS_getpid 20
#define SYS___pthread_kill 328
#define SYS_pthread_sigmask 329
#define SYS_setitimer 83
#define SYS___sysctl 202
#define SYS_sigaction 46
#define SYS_sigreturn 184
#define SYS_select 93
#define SYS_bsdthread_register 366
#define SYS_bsdthread_create 360
#define SYS_bsdthread_terminate 361
#define SYS_kqueue 362
#define SYS_kevent 363
#define SYS_fcntl 92
@ -41,85 +28,39 @@ TEXT notok<>(SB),NOSPLIT,$0
MOVW R8, (R8)
B 0(PC)
TEXT runtime·open(SB),NOSPLIT,$0
MOVW name+0(FP), R0
MOVW mode+4(FP), R1
MOVW perm+8(FP), R2
MOVW $SYS_open, R12
SWI $0x80
MOVW.CS $-1, R0
MOVW R0, ret+12(FP)
TEXT runtime·open_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 mode
MOVW 8(R0), R2 // arg 3 perm
MOVW 0(R0), R0 // arg 1 name
BL libc_open(SB)
RET
TEXT runtime·closefd(SB),NOSPLIT,$0
MOVW fd+0(FP), R0
MOVW $SYS_close, R12
SWI $0x80
MOVW.CS $-1, R0
MOVW R0, ret+4(FP)
TEXT runtime·close_trampoline(SB),NOSPLIT,$0
MOVW 0(R0), R0 // arg 1 fd
BL libc_close(SB)
RET
TEXT runtime·write(SB),NOSPLIT,$0
MOVW fd+0(FP), R0
MOVW p+4(FP), R1
MOVW n+8(FP), R2
MOVW $SYS_write, R12
SWI $0x80
MOVW.CS $-1, R0
MOVW R0, ret+12(FP)
TEXT runtime·write_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 buf
MOVW 8(R0), R2 // arg 3 count
MOVW 0(R0), R0 // arg 1 fd
BL libc_write(SB)
RET
TEXT runtime·read(SB),NOSPLIT,$0
MOVW fd+0(FP), R0
MOVW p+4(FP), R1
MOVW n+8(FP), R2
MOVW $SYS_read, R12
SWI $0x80
MOVW.CS $-1, R0
MOVW R0, ret+12(FP)
TEXT runtime·read_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 buf
MOVW 8(R0), R2 // arg 3 count
MOVW 0(R0), R0 // arg 1 fd
BL libc_read(SB)
RET
TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
MOVW code+0(FP), R0
MOVW $SYS_exit, R12
SWI $0x80
TEXT runtime·exit_trampoline(SB),NOSPLIT|NOFRAME,$0
MOVW 0(R0), R0 // arg 0 code
BL libc_exit(SB)
MOVW $1234, R0
MOVW $1002, R1
MOVW R0, (R1) // fail hard
// Exit this OS thread (like pthread_exit, which eventually
// calls __bsdthread_terminate).
TEXT exit1<>(SB),NOSPLIT,$0
// Because of exitThread below, this must not use the stack.
// __bsdthread_terminate takes 4 word-size arguments.
// Set them all to 0. (None are an exit status.)
MOVW $0, R0
MOVW $0, R1
MOVW $0, R2
MOVW $0, R3
MOVW $SYS_bsdthread_terminate, R12
SWI $0x80
MOVW $1234, R0
MOVW $1003, R1
MOVW R0, (R1) // fail hard
// func exitThread(wait *uint32)
TEXT runtime·exitThread(SB),NOSPLIT,$0-4
MOVW wait+0(FP), R0
// We're done using the stack.
MOVW $0, R2
storeloop:
LDREX (R0), R4 // loads R4
STREX R2, (R0), R1 // stores R2
CMP $0, R1
BNE storeloop
JMP exit1<>(SB)
TEXT runtime·raise(SB),NOSPLIT,$0
// Ideally we'd send the signal to the current thread,
// not the whole process, but that's too hard on OS X.
JMP runtime·raiseproc(SB)
TEXT runtime·raiseproc(SB),NOSPLIT,$24
MOVW $SYS_getpid, R12
SWI $0x80
@ -130,41 +71,49 @@ TEXT runtime·raiseproc(SB),NOSPLIT,$24
SWI $0x80
RET
TEXT runtime·mmap(SB),NOSPLIT,$0
MOVW addr+0(FP), R0
MOVW n+4(FP), R1
MOVW prot+8(FP), R2
MOVW flags+12(FP), R3
MOVW fd+16(FP), R4
MOVW off+20(FP), R5
MOVW $0, R6 // off_t is uint64_t
MOVW $SYS_mmap, R12
SWI $0x80
TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
MOVW R0, R8
MOVW 0(R8), R0 // arg 1 addr
MOVW 4(R8), R1 // arg 2 len
MOVW 8(R8), R2 // arg 3 prot
MOVW 12(R8), R3 // arg 4 flags
MOVW 16(R8), R4 // arg 5 fid
MOVW 20(R8), R5 // arg 6 offset
MOVW $0, R6 // off_t is uint64_t
// Only R0-R3 are used for arguments, the rest
// go on the stack.
MOVM.DB.W [R4-R6], (R13)
BL libc_mmap(SB)
ADD $12, R13
MOVW $0, R1
BCC ok
MOVW R1, p+24(FP)
MOVW R0, err+28(FP)
RET
MOVW $-1, R2
CMP R0, R2
BNE ok
BL libc_error(SB)
MOVW (R0), R1
MOVW $0, R0
ok:
MOVW R0, p+24(FP)
MOVW R1, err+28(FP)
MOVW R0, 24(R8) // ret 1 addr
MOVW R1, 28(R8) // ret 2 err
RET
TEXT runtime·munmap(SB),NOSPLIT,$0
MOVW addr+0(FP), R0
MOVW n+4(FP), R1
MOVW $SYS_munmap, R12
SWI $0x80
BL.CS notok<>(SB)
TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 len
MOVW 0(R0), R0 // arg 1 addr
BL libc_munmap(SB)
MOVW $-1, R2
CMP R0, R2
BL.EQ notok<>(SB)
RET
TEXT runtime·madvise(SB),NOSPLIT,$0
MOVW addr+0(FP), R0
MOVW n+4(FP), R1
MOVW flags+8(FP), R2
MOVW $SYS_madvise, R12
SWI $0x80
BL.CS notok<>(SB)
TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 len
MOVW 8(R0), R2 // arg 3 advice
MOVW 0(R0), R0 // arg 1 addr
BL libc_madvise(SB)
MOVW $-1, R2
CMP R0, R2
BL.EQ notok<>(SB)
RET
TEXT runtime·setitimer(SB),NOSPLIT,$0
@ -195,28 +144,36 @@ inreg:
MOVW R2, nsec+8(FP)
RET
TEXT runtime·nanotime(SB),NOSPLIT,$32
MOVW $8(R13), R0 // timeval
MOVW $0, R1 // zone
MOVW $0, R2 // see issue 16570
MOVW $SYS_gettimeofday, R12
SWI $0x80 // Note: R0 is tv_sec, R1 is tv_usec
CMP $0, R0
BNE inreg
MOVW 8(R13), R0
MOVW 12(R13), R1
inreg:
MOVW R1, R2
MOVW $1000000000, R3
MULLU R0, R3, (R1, R0)
MOVW $1000, R3
MOVW $0, R4
MUL R3, R2
ADD.S R2, R0
ADC R4, R1
GLOBL timebase<>(SB),NOPTR,$(machTimebaseInfo__size)
MOVW R0, ret_lo+0(FP)
MOVW R1, ret_hi+4(FP)
TEXT runtime·nanotime_trampoline(SB),NOSPLIT,$0
MOVW R0, R8
BL libc_mach_absolute_time(SB)
MOVW R0, 0(R8)
MOVW R1, 4(R8)
MOVW timebase<>+machTimebaseInfo_numer(SB), R6
MOVW $timebase<>+machTimebaseInfo_denom(SB), R5
MOVW (R5), R7
DMB MB_ISH // memory barrier for atomic read
CMP $0, R7
BNE initialized
SUB $(machTimebaseInfo__size+7)/8*8, R13
MOVW R13, R0
BL libc_mach_timebase_info(SB)
MOVW machTimebaseInfo_numer(R13), R6
MOVW machTimebaseInfo_denom(R13), R7
ADD $(machTimebaseInfo__size+7)/8*8, R13
MOVW R6, timebase<>+machTimebaseInfo_numer(SB)
MOVW $timebase<>+machTimebaseInfo_denom(SB), R5
DMB MB_ISH // memory barrier for atomic write
MOVW R7, (R5)
DMB MB_ISH
initialized:
MOVW R6, 8(R8)
MOVW R7, 12(R8)
RET
TEXT runtime·sigfwd(SB),NOSPLIT,$0-16
@ -318,20 +275,9 @@ TEXT runtime·sigaction(SB),NOSPLIT,$0
SWI $0x80
RET
TEXT runtime·usleep(SB),NOSPLIT,$12
MOVW usec+0(FP), R0
CALL runtime·usplitR0(SB)
MOVW R0, a-12(SP)
MOVW R1, b-8(SP)
// select(0, 0, 0, 0, &tv)
MOVW $0, R0
MOVW $0, R1
MOVW $0, R2
MOVW $0, R3
MOVW $a-12(SP), R4
MOVW $SYS_select, R12
SWI $0x80
TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
MOVW 0(R0), R0 // arg 1 usec
BL libc_usleep(SB)
RET
TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
@ -355,65 +301,6 @@ sysctl_ret:
MOVW R0, ret+24(FP)
RET
// Thread related functions
// func bsdthread_create(stk, arg unsafe.Pointer, fn uintptr) int32
TEXT runtime·bsdthread_create(SB),NOSPLIT,$0
// Set up arguments to bsdthread_create system call.
// The ones in quotes pass through to the thread callback
// uninterpreted, so we can put whatever we want there.
MOVW fn+8(FP), R0 // "func"
MOVW arg+4(FP), R1 // "arg"
MOVW stk+0(FP), R2 // stack
MOVW $0x01000000, R4 // flags = PTHREAD_START_CUSTOM
MOVW $0, R5 // paranoia
MOVW $SYS_bsdthread_create, R12
SWI $0x80
BCC create_ret
RSB $0, R0, R0
MOVW R0, ret+12(FP)
RET
create_ret:
MOVW $0, R0
MOVW R0, ret+12(FP)
RET
// The thread that bsdthread_create creates starts executing here,
// because we registered this function using bsdthread_register
// at startup.
// R0 = "pthread"
// R1 = mach thread port
// R2 = "func" (= fn)
// R3 = "arg" (= m)
// R4 = stack
// R5 = flags (= 0)
// XXX: how to deal with R4/SP? ref: Libc-594.9.1/arm/pthreads/thread_start.s
TEXT runtime·bsdthread_start(SB),NOSPLIT,$0
MOVW R1, m_procid(R3) // thread port is m->procid
MOVW m_g0(R3), g
MOVW R3, g_m(g)
// ARM don't have runtime·stackcheck(SB)
// disable runfast mode of vfp
EOR R12, R12
WORD $0xeee1ca10 // fmxr fpscr, ip
BL (R2) // fn
BL exit1<>(SB)
RET
// int32 bsdthread_register(void)
// registers callbacks for threadstart (see bsdthread_create above
// and wqthread and pthsize (not used). returns 0 on success.
TEXT runtime·bsdthread_register(SB),NOSPLIT,$0
MOVW $runtime·bsdthread_start(SB), R0 // threadstart
MOVW $0, R1 // wqthread, not used by us
MOVW $0, R2 // pthsize, not used by us
MOVW $0, R3 // dummy_value [sic]
MOVW $0, R4 // targetconc_ptr
MOVW $0, R5 // dispatchqueue_offset
MOVW $SYS_bsdthread_register, R12 // bsdthread_register
SWI $0x80
MOVW R0, ret+0(FP)
RET
// uint32 mach_msg_trap(void*, uint32, uint32, uint32, uint32, uint32, uint32)
TEXT runtime·mach_msg_trap(SB),NOSPLIT,$0
MOVW h+0(FP), R0
@ -519,3 +406,38 @@ TEXT runtime·closeonexec(SB),NOSPLIT,$0
// to do the stack switch ourselves.
TEXT runtime·sigaltstack(SB),NOSPLIT,$0
RET
// Thread related functions
// Note: On darwin/arm, the runtime always use runtime/cgo to
// create threads, so all thread related functions will just exit with a
// unique status.
TEXT runtime·mstart_stub(SB),NOSPLIT,$0
MOVW $44, R0
BL libc_exit(SB)
RET
TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0
MOVW $45, R0
BL libc_exit(SB)
RET
TEXT runtime·pthread_attr_setstacksize_trampoline(SB),NOSPLIT,$0
MOVW $46, R0
BL libc_exit(SB)
RET
TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
MOVW $47, R0
BL libc_exit(SB)
RET
TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
MOVW $48, R0
BL libc_exit(SB)
RET
TEXT runtime·raise_trampoline(SB),NOSPLIT,$0
MOVW 0(R0), R0 // arg 1 sig
BL libc_raise(SB)
RET

290
src/runtime/sys_darwin_arm64.s
View File

@ -11,27 +11,14 @@
#include "textflag.h"
// Copied from /usr/include/sys/syscall.h
#define SYS_exit 1
#define SYS_read 3
#define SYS_write 4
#define SYS_open 5
#define SYS_close 6
#define SYS_mmap 197
#define SYS_munmap 73
#define SYS_madvise 75
#define SYS_gettimeofday 116
#define SYS_kill 37
#define SYS_getpid 20
#define SYS___pthread_kill 328
#define SYS_pthread_sigmask 329
#define SYS_setitimer 83
#define SYS___sysctl 202
#define SYS_sigaction 46
#define SYS_sigreturn 184
#define SYS_select 93
#define SYS_bsdthread_register 366
#define SYS_bsdthread_create 360
#define SYS_bsdthread_terminate 361
#define SYS_kqueue 362
#define SYS_kevent 363
#define SYS_fcntl 92
@ -41,81 +28,39 @@ TEXT notok<>(SB),NOSPLIT,$0
MOVD R8, (R8)
B 0(PC)
TEXT runtime·open(SB),NOSPLIT,$0
MOVD name+0(FP), R0
MOVW mode+8(FP), R1
MOVW perm+12(FP), R2
MOVD $SYS_open, R16
SVC $0x80
CSINV LO, R0, ZR, R0
MOVW R0, ret+16(FP)
TEXT runtime·open_trampoline(SB),NOSPLIT,$0
MOVW 8(R0), R1 // arg 2 flags
MOVW 12(R0), R2 // arg 3 mode
MOVD 0(R0), R0 // arg 1 pathname
BL libc_open(SB)
RET
TEXT runtime·closefd(SB),NOSPLIT,$0
MOVW fd+0(FP), R0
MOVW $SYS_close, R16
SVC $0x80
CSINV LO, R0, ZR, R0
MOVW R0, ret+8(FP)
TEXT runtime·close_trampoline(SB),NOSPLIT,$0
MOVW 0(R0), R0 // arg 1 fd
BL libc_close(SB)
RET
TEXT runtime·write(SB),NOSPLIT,$0
MOVW fd+0(FP), R0
MOVD p+8(FP), R1
MOVW n+16(FP), R2
MOVW $SYS_write, R16
SVC $0x80
CSINV LO, R0, ZR, R0
MOVW R0, ret+24(FP)
TEXT runtime·write_trampoline(SB),NOSPLIT,$0
MOVD 8(R0), R1 // arg 2 buf
MOVW 16(R0), R2 // arg 3 count
MOVW 0(R0), R0 // arg 1 fd
BL libc_write(SB)
RET
TEXT runtime·read(SB),NOSPLIT,$0
MOVW fd+0(FP), R0
MOVD p+8(FP), R1
MOVW n+16(FP), R2
MOVW $SYS_read, R16
SVC $0x80
CSINV LO, R0, ZR, R0
MOVW R0, ret+24(FP)
TEXT runtime·read_trampoline(SB),NOSPLIT,$0
MOVD 8(R0), R1 // arg 2 buf
MOVW 16(R0), R2 // arg 3 count
MOVW 0(R0), R0 // arg 1 fd
BL libc_read(SB)
RET
TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
MOVW code+0(FP), R0
MOVW $SYS_exit, R16
SVC $0x80
TEXT runtime·exit_trampoline(SB),NOSPLIT|NOFRAME,$0
MOVW 0(R0), R0
BL libc_exit(SB)
MOVD $1234, R0
MOVD $1002, R1
MOVD R0, (R1) // fail hard
// Exit this OS thread (like pthread_exit, which eventually
// calls __bsdthread_terminate).
TEXT exit1<>(SB),NOSPLIT,$0
// Because of exitThread below, this must not use the stack.
// __bsdthread_terminate takes 4 word-size arguments.
// Set them all to 0. (None are an exit status.)
MOVW $0, R0
MOVW $0, R1
MOVW $0, R2
MOVW $0, R3
MOVW $SYS_bsdthread_terminate, R16
SVC $0x80
MOVD $1234, R0
MOVD $1003, R1
MOVD R0, (R1) // fail hard
// func exitThread(wait *uint32)
TEXT runtime·exitThread(SB),NOSPLIT,$0-8
MOVD wait+0(FP), R0
// We're done using the stack.
MOVW $0, R1
STLRW R1, (R0)
JMP exit1<>(SB)
TEXT runtime·raise(SB),NOSPLIT,$0
// Ideally we'd send the signal to the current thread,
// not the whole process, but that's too hard on OS X.
JMP runtime·raiseproc(SB)
TEXT runtime·raiseproc(SB),NOSPLIT,$0
MOVW $SYS_getpid, R16
SVC $0x80
@ -126,41 +71,41 @@ TEXT runtime·raiseproc(SB),NOSPLIT,$0
SVC $0x80
RET
TEXT runtime·mmap(SB),NOSPLIT,$0
MOVD addr+0(FP), R0
MOVD n+8(FP), R1
MOVW prot+16(FP), R2
MOVW flags+20(FP), R3
MOVW fd+24(FP), R4
MOVW off+28(FP), R5
MOVW $SYS_mmap, R16
SVC $0x80
BCC ok
MOVD $0, p+32(FP)
MOVD R0, err+40(FP)
RET
TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
MOVD R0, R19
MOVD 0(R19), R0 // arg 1 addr
MOVD 8(R19), R1 // arg 2 len
MOVW 16(R19), R2 // arg 3 prot
MOVW 20(R19), R3 // arg 4 flags
MOVW 24(R19), R4 // arg 5 fd
MOVW 28(R19), R5 // arg 6 off
BL libc_mmap(SB)
MOVD $0, R1
MOVD $-1, R2
CMP R0, R2
BNE ok
BL libc_error(SB)
MOVD (R0), R1
MOVD $0, R0
ok:
MOVD R0, p+32(FP)
MOVD $0, err+40(FP)
MOVD R0, 32(R19) // ret 1 p
MOVD R1, 40(R19) // ret 2 err
RET
TEXT runtime·munmap(SB),NOSPLIT,$0
MOVD addr+0(FP), R0
MOVD n+8(FP), R1
MOVW $SYS_munmap, R16
SVC $0x80
BCC 2(PC)
TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
MOVD 8(R0), R1 // arg 2 len
MOVD 0(R0), R0 // arg 1 addr
BL libc_munmap(SB)
CMP $0, R0
BEQ 2(PC)
BL notok<>(SB)
RET
TEXT runtime·madvise(SB),NOSPLIT,$0
MOVD addr+0(FP), R0
MOVD n+8(FP), R1
MOVW flags+16(FP), R2
MOVW $SYS_madvise, R16
SVC $0x80
BCC 2(PC)
BL notok<>(SB)
TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0
MOVD 8(R0), R1 // arg 2 len
MOVW 16(R0), R2 // arg 3 advice
MOVD 0(R0), R0 // arg 1 addr
BL libc_madvise(SB)
RET
TEXT runtime·setitimer(SB),NOSPLIT,$0
@ -189,25 +134,32 @@ inreg:
MOVW R1, nsec+8(FP)
RET
TEXT runtime·nanotime(SB),NOSPLIT,$40
MOVD RSP, R0 // timeval
MOVD R0, R9 // this is how dyld calls gettimeofday
MOVW $0, R1 // zone
MOVD $0, R2 // see issue 16570
MOVW $SYS_gettimeofday, R16
SVC $0x80 // Note: x0 is tv_sec, w1 is tv_usec
CMP $0, R0
BNE inreg
MOVD 0(RSP), R0
MOVW 8(RSP), R1
inreg:
MOVW $1000000000, R3
MUL R3, R0
MOVW $1000, R3
MUL R3, R1
ADD R1, R0
GLOBL timebase<>(SB),NOPTR,$(machTimebaseInfo__size)
MOVD R0, ret+0(FP)
TEXT runtime·nanotime_trampoline(SB),NOSPLIT,$40
MOVD R0, R19
BL libc_mach_absolute_time(SB)
MOVD R0, 0(R19)
MOVW timebase<>+machTimebaseInfo_numer(SB), R20
MOVD $timebase<>+machTimebaseInfo_denom(SB), R21
LDARW (R21), R21 // atomic read
CMP $0, R21
BNE initialized
SUB $(machTimebaseInfo__size+15)/16*16, RSP
MOVD RSP, R0
BL libc_mach_timebase_info(SB)
MOVW machTimebaseInfo_numer(RSP), R20
MOVW machTimebaseInfo_denom(RSP), R21
ADD $(machTimebaseInfo__size+15)/16*16, RSP
MOVW R20, timebase<>+machTimebaseInfo_numer(SB)
MOVD $timebase<>+machTimebaseInfo_denom(SB), R22
STLRW R21, (R22) // atomic write
initialized:
MOVW R20, 8(R19)
MOVW R21, 12(R19)
RET
TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
@ -310,24 +262,9 @@ TEXT runtime·sigaction(SB),NOSPLIT,$0
BL notok<>(SB)
RET
TEXT runtime·usleep(SB),NOSPLIT,$24
MOVW usec+0(FP), R0
MOVW R0, R1
MOVW $1000000, R2
UDIV R2, R0
MUL R0, R2
SUB R2, R1
MOVD R0, 0(RSP)
MOVW R1, 8(RSP)
// select(0, 0, 0, 0, &tv)
MOVW $0, R0
MOVW $0, R1
MOVW $0, R2
MOVW $0, R3
MOVD RSP, R4
MOVW $SYS_select, R16
SVC $0x80
TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
MOVW 0(R0), R0 // arg 1 usec
BL libc_usleep(SB)
RET
TEXT runtime·sysctl(SB),NOSPLIT,$0
@ -348,42 +285,6 @@ ok:
MOVW R0, ret+48(FP)
RET
// Thread related functions
// Note: On darwin/arm64, it is no longer possible to use bsdthread_register
// as the libc is always linked in. The runtime must use runtime/cgo to
// create threads, so all thread related functions will just exit with a
// unique status.
// void bsdthread_create(void *stk, M *m, G *g, void (*fn)(void))
TEXT runtime·bsdthread_create(SB),NOSPLIT,$0
MOVD $44, R0
MOVW $SYS_exit, R16
SVC $0x80
RET
// The thread that bsdthread_create creates starts executing here,
// because we registered this function using bsdthread_register
// at startup.
// R0 = "pthread"
// R1 = mach thread port
// R2 = "func" (= fn)
// R3 = "arg" (= m)
// R4 = stack
// R5 = flags (= 0)
TEXT runtime·bsdthread_start(SB),NOSPLIT,$0
MOVD $45, R0
MOVW $SYS_exit, R16
SVC $0x80
RET
// int32 bsdthread_register(void)
// registers callbacks for threadstart (see bsdthread_create above
// and wqthread and pthsize (not used). returns 0 on success.
TEXT runtime·bsdthread_register(SB),NOSPLIT,$0
MOVD $46, R0
MOVW $SYS_exit, R16
SVC $0x80
RET
// uint32 mach_msg_trap(void*, uint32, uint32, uint32, uint32, uint32, uint32)
TEXT runtime·mach_msg_trap(SB),NOSPLIT,$0
MOVD h+0(FP), R0
@ -491,3 +392,38 @@ TEXT runtime·closeonexec(SB),NOSPLIT,$0
// to do the stack switch ourselves.
TEXT runtime·sigaltstack(SB),NOSPLIT,$0
RET
// Thread related functions
// Note: On darwin/arm64, the runtime always use runtime/cgo to
// create threads, so all thread related functions will just exit with a
// unique status.
TEXT runtime·mstart_stub(SB),NOSPLIT,$0
MOVW $44, R0
BL libc_exit(SB)
RET
TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0
MOVW $45, R0
BL libc_exit(SB)
RET
TEXT runtime·pthread_attr_setstacksize_trampoline(SB),NOSPLIT,$0
MOVW $46, R0
BL libc_exit(SB)
RET
TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
MOVW $47, R0
BL libc_exit(SB)
RET
TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
MOVW $48, R0
BL libc_exit(SB)
RET
TEXT runtime·raise_trampoline(SB),NOSPLIT,$0
MOVW 0(R0), R0 // arg 1 sig
BL libc_raise(SB)
RET

6
src/runtime/vlrt.go
View File

@ -106,7 +106,6 @@ func _d2v(y *uint64, d float64) {
*y = uint64(yhi)<<32 | uint64(ylo)
}
func uint64div(n, d uint64) uint64 {
// Check for 32 bit operands
if uint32(n>>32) == 0 && uint32(d>>32) == 0 {
@ -131,6 +130,9 @@ func uint64mod(n, d uint64) uint64 {
return r
}
//go:nosplit
// nosplit because division is used in syscall context in nanotime on darwin/386
// and darwin/arm where stack splits are not allowed.
func int64div(n, d int64) int64 {
// Check for 32 bit operands
if int64(int32(n)) == n && int64(int32(d)) == d {
@ -191,6 +193,7 @@ func _mul64by32(lo64 *uint64, a uint64, b uint32) (hi32 uint32)
//go:noescape
func _div64by32(a uint64, b uint32, r *uint32) (q uint32)
//go:nosplit
func dodiv(n, d uint64) (q, r uint64) {
if GOARCH == "arm" {
// arm doesn't have a division instruction, so
@ -234,6 +237,7 @@ func dodiv(n, d uint64) (q, r uint64) {
return uint64(qhi)<<32 + uint64(qlo), uint64(rlo)
}
//go:nosplit
func slowdodiv(n, d uint64) (q, r uint64) {
if d == 0 {
panicdivide()