syscall: Use vsyscall for syscall.Gettimeofday and .Time on linux amd64.

Regenerate zsyscall_linux_*.go files with recent changes to
mksyscall.sh.

Add socketpair to syscall_linux_amd64.go; for some reason it
was in the generated file but not in the source file.

R=rsc, r2
CC=golang-dev
https://golang.org/cl/2190044

8 files changed, 172 insertions, 152 deletions

diff --git a/src/pkg/syscall/asm_linux_amd64.s b/src/pkg/syscall/asm_linux_amd64.s
index cfb44434a5..20a5a4fb7d 100644
--- a/src/pkg/syscall/asm_linux_amd64.s
+++ b/src/pkg/syscall/asm_linux_amd64.s
@@ -82,3 +82,26 @@ ok1:
 	MOVQ	DX, 48(SP)	// r2
 	MOVQ	$0, 56(SP)	// errno
 	RET
+
+TEXT ·Gettimeofday(SB),7,$0
+	MOVQ	8(SP), DI
+	MOVQ	$0, SI
+	MOVQ	$0xffffffffff600000, AX
+	CALL	AX
+
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	ok7
+	NEGQ	AX
+	MOVQ	AX, 16(SP)  // errno
+	RET
+ok7:
+	MOVQ	$0, 16(SP)  // errno
+	RET
+
+TEXT ·Time(SB),7,$0
+	MOVQ	8(SP), DI
+	MOVQ	$0xffffffffff600400, AX
+	CALL	AX
+	MOVQ	AX, 16(SP)  // tt
+	MOVQ	$0, 24(SP)  // errno
+	RET
diff --git a/src/pkg/syscall/syscall_linux.go b/src/pkg/syscall/syscall_linux.go
index b03bbb1d0c..8ee9bebae8 100644
--- a/src/pkg/syscall/syscall_linux.go
+++ b/src/pkg/syscall/syscall_linux.go
@@ -593,7 +593,6 @@ func PtraceDetach(pid int) (errno int) { return ptrace(PTRACE_DETACH, pid, 0, 0)
 //sys	Getrlimit(resource int, rlim *Rlimit) (errno int)
 //sys	Getrusage(who int, rusage *Rusage) (errno int)
 //sys	Gettid() (tid int)
-//sys	Gettimeofday(tv *Timeval) (errno int)
 //sys	Kill(pid int, sig int) (errno int)
 //sys	Klogctl(typ int, buf []byte) (n int, errno int) = SYS_SYSLOG
 //sys	Link(oldpath string, newpath string) (errno int)
@@ -624,7 +623,6 @@ func PtraceDetach(pid int) (errno int) { return ptrace(PTRACE_DETACH, pid, 0, 0)
 //sys	Sysinfo(info *Sysinfo_t) (errno int)
 //sys	Tee(rfd int, wfd int, len int, flags int) (n int64, errno int)
 //sys	Tgkill(tgid int, tid int, sig int) (errno int)
-//sys	Time(t *Time_t) (tt Time_t, errno int)
 //sys	Times(tms *Tms) (ticks uintptr, errno int)
 //sys	Truncate(path string, length int64) (errno int)
 //sys	Umask(mask int) (oldmask int)
diff --git a/src/pkg/syscall/syscall_linux_386.go b/src/pkg/syscall/syscall_linux_386.go
index 2997785418..3709b317a1 100644
--- a/src/pkg/syscall/syscall_linux_386.go
+++ b/src/pkg/syscall/syscall_linux_386.go
@@ -55,6 +55,10 @@ func NsecToTimeval(nsec int64) (tv Timeval) {
 // Implemented in assembly to avoid allocation.
 func Seek(fd int, offset int64, whence int) (newoffset int64, errno int)
 
+// Vsyscalls on amd64.
+//sys	Gettimeofday(tv *Timeval) (errno int)
+//sys	Time(t *Time_t) (tt Time_t, errno int)
+
 // On x86 Linux, all the socket calls go through an extra indirection,
 // I think because the 5-register system call interface can't handle
 // the 6-argument calls like sendto and recvfrom.  Instead the
diff --git a/src/pkg/syscall/syscall_linux_amd64.go b/src/pkg/syscall/syscall_linux_amd64.go
index 8e5471af72..72678ee71d 100644
--- a/src/pkg/syscall/syscall_linux_amd64.go
+++ b/src/pkg/syscall/syscall_linux_amd64.go
@@ -37,6 +37,7 @@ package syscall
 //sys	setgroups(n int, list *_Gid_t) (errno int)
 //sys	setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int)
 //sys	socket(domain int, typ int, proto int) (fd int, errno int)
+//sys	socketpair(domain int, typ int, proto int, fd *[2]int) (errno int)
 //sys	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
 //sys	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
 //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, errno int)
@@ -44,6 +45,9 @@ package syscall
 
 func Getpagesize() int { return 4096 }
 
+func Gettimeofday(tv *Timeval) (errno int)
+func Time(t *Time_t) (tt Time_t, errno int)
+
 func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
 
 func NsecToTimespec(nsec int64) (ts Timespec) {
diff --git a/src/pkg/syscall/syscall_linux_arm.go b/src/pkg/syscall/syscall_linux_arm.go
index 3b4573e415..e3c1c03635 100644
--- a/src/pkg/syscall/syscall_linux_arm.go
+++ b/src/pkg/syscall/syscall_linux_arm.go
@@ -58,6 +58,10 @@ func NsecToTimeval(nsec int64) (tv Timeval) {
 //sys	Stat(path string, stat *Stat_t) (errno int) = SYS_STAT64
 //sys	Statfs(path string, buf *Statfs_t) (errno int) = SYS_STATFS64
 
+// Vsyscalls on amd64.
+//sys	Gettimeofday(tv *Timeval) (errno int)
+//sys	Time(t *Time_t) (tt Time_t, errno int)
+
 // TODO(kaib): add support for tracing
 func (r *PtraceRegs) PC() uint64 { return 0 }
 
diff --git a/src/pkg/syscall/zsyscall_linux_386.go b/src/pkg/syscall/zsyscall_linux_386.go
index e595305041..1d4c4224b3 100644
--- a/src/pkg/syscall/zsyscall_linux_386.go
+++ b/src/pkg/syscall/zsyscall_linux_386.go
@@ -38,11 +38,11 @@ func futimesat(dirfd int, path *byte, times *[2]Timeval) (errno int) {
 }
 
 func Getcwd(buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_GETCWD, uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)), 0)
+	r0, _, e1 := Syscall(SYS_GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -139,11 +139,11 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (errno int) {
 }
 
 func EpollWait(epfd int, events []EpollEvent, msec int) (n int, errno int) {
-	var _p0 *EpollEvent
+	var _p0 unsafe.Pointer
 	if len(events) > 0 {
-		_p0 = &events[0]
+		_p0 = unsafe.Pointer(&events[0])
 	}
-	r0, _, e1 := Syscall6(SYS_EPOLL_WAIT, uintptr(epfd), uintptr(unsafe.Pointer(_p0)), uintptr(len(events)), uintptr(msec), 0, 0)
+	r0, _, e1 := Syscall6(SYS_EPOLL_WAIT, uintptr(epfd), uintptr(_p0), uintptr(len(events)), uintptr(msec), 0, 0)
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -216,11 +216,11 @@ func Ftruncate(fd int, length int64) (errno int) {
 }
 
 func Getdents(fd int, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -269,12 +269,6 @@ func Gettid() (tid int) {
 	return
 }
 
-func Gettimeofday(tv *Timeval) (errno int) {
-	_, _, e1 := Syscall(SYS_GETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
-	errno = int(e1)
-	return
-}
-
 func Kill(pid int, sig int) (errno int) {
 	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(sig), 0)
 	errno = int(e1)
@@ -282,11 +276,11 @@ func Kill(pid int, sig int) (errno int) {
 }
 
 func Klogctl(typ int, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_SYSLOG, uintptr(typ), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_SYSLOG, uintptr(typ), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -341,44 +335,44 @@ func PivotRoot(newroot string, putold string) (errno int) {
 }
 
 func Pread(fd int, p []byte, offset int64) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall6(SYS_PREAD64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
+	r0, _, e1 := Syscall6(SYS_PREAD64, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Pwrite(fd int, p []byte, offset int64) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall6(SYS_PWRITE64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
+	r0, _, e1 := Syscall6(SYS_PWRITE64, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Read(fd int, p []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)))
+	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Readlink(path string, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -403,21 +397,21 @@ func Rmdir(path string) (errno int) {
 }
 
 func Setdomainname(p []byte) (errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	_, _, e1 := Syscall(SYS_SETDOMAINNAME, uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), 0)
+	_, _, e1 := Syscall(SYS_SETDOMAINNAME, uintptr(_p0), uintptr(len(p)), 0)
 	errno = int(e1)
 	return
 }
 
 func Sethostname(p []byte) (errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	_, _, e1 := Syscall(SYS_SETHOSTNAME, uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), 0)
+	_, _, e1 := Syscall(SYS_SETHOSTNAME, uintptr(_p0), uintptr(len(p)), 0)
 	errno = int(e1)
 	return
 }
@@ -490,13 +484,6 @@ func Tgkill(tgid int, tid int, sig int) (errno int) {
 	return
 }
 
-func Time(t *Time_t) (tt Time_t, errno int) {
-	r0, _, e1 := Syscall(SYS_TIME, uintptr(unsafe.Pointer(t)), 0, 0)
-	tt = Time_t(r0)
-	errno = int(e1)
-	return
-}
-
 func Times(tms *Tms) (ticks uintptr, errno int) {
 	r0, _, e1 := Syscall(SYS_TIMES, uintptr(unsafe.Pointer(tms)), 0, 0)
 	ticks = uintptr(r0)
@@ -553,11 +540,11 @@ func Utime(path string, buf *Utimbuf) (errno int) {
 }
 
 func Write(fd int, p []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)))
+	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -722,3 +709,16 @@ func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err
 	errno = int(e1)
 	return
 }
+
+func Gettimeofday(tv *Timeval) (errno int) {
+	_, _, e1 := Syscall(SYS_GETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
+	errno = int(e1)
+	return
+}
+
+func Time(t *Time_t) (tt Time_t, errno int) {
+	r0, _, e1 := Syscall(SYS_TIME, uintptr(unsafe.Pointer(t)), 0, 0)
+	tt = Time_t(r0)
+	errno = int(e1)
+	return
+}
diff --git a/src/pkg/syscall/zsyscall_linux_amd64.go b/src/pkg/syscall/zsyscall_linux_amd64.go
index e1508025b6..8390aa6f78 100644
--- a/src/pkg/syscall/zsyscall_linux_amd64.go
+++ b/src/pkg/syscall/zsyscall_linux_amd64.go
@@ -38,11 +38,11 @@ func futimesat(dirfd int, path *byte, times *[2]Timeval) (errno int) {
 }
 
 func Getcwd(buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_GETCWD, uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)), 0)
+	r0, _, e1 := Syscall(SYS_GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -139,11 +139,11 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (errno int) {
 }
 
 func EpollWait(epfd int, events []EpollEvent, msec int) (n int, errno int) {
-	var _p0 *EpollEvent
+	var _p0 unsafe.Pointer
 	if len(events) > 0 {
-		_p0 = &events[0]
+		_p0 = unsafe.Pointer(&events[0])
 	}
-	r0, _, e1 := Syscall6(SYS_EPOLL_WAIT, uintptr(epfd), uintptr(unsafe.Pointer(_p0)), uintptr(len(events)), uintptr(msec), 0, 0)
+	r0, _, e1 := Syscall6(SYS_EPOLL_WAIT, uintptr(epfd), uintptr(_p0), uintptr(len(events)), uintptr(msec), 0, 0)
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -216,11 +216,11 @@ func Ftruncate(fd int, length int64) (errno int) {
 }
 
 func Getdents(fd int, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -269,12 +269,6 @@ func Gettid() (tid int) {
 	return
 }
 
-func Gettimeofday(tv *Timeval) (errno int) {
-	_, _, e1 := Syscall(SYS_GETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
-	errno = int(e1)
-	return
-}
-
 func Kill(pid int, sig int) (errno int) {
 	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(sig), 0)
 	errno = int(e1)
@@ -282,11 +276,11 @@ func Kill(pid int, sig int) (errno int) {
 }
 
 func Klogctl(typ int, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_SYSLOG, uintptr(typ), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_SYSLOG, uintptr(typ), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -341,44 +335,44 @@ func PivotRoot(newroot string, putold string) (errno int) {
 }
 
 func Pread(fd int, p []byte, offset int64) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall6(SYS_PREAD64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(offset), 0, 0)
+	r0, _, e1 := Syscall6(SYS_PREAD64, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Pwrite(fd int, p []byte, offset int64) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall6(SYS_PWRITE64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(offset), 0, 0)
+	r0, _, e1 := Syscall6(SYS_PWRITE64, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Read(fd int, p []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)))
+	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Readlink(path string, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -403,21 +397,21 @@ func Rmdir(path string) (errno int) {
 }
 
 func Setdomainname(p []byte) (errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	_, _, e1 := Syscall(SYS_SETDOMAINNAME, uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), 0)
+	_, _, e1 := Syscall(SYS_SETDOMAINNAME, uintptr(_p0), uintptr(len(p)), 0)
 	errno = int(e1)
 	return
 }
 
 func Sethostname(p []byte) (errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	_, _, e1 := Syscall(SYS_SETHOSTNAME, uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), 0)
+	_, _, e1 := Syscall(SYS_SETHOSTNAME, uintptr(_p0), uintptr(len(p)), 0)
 	errno = int(e1)
 	return
 }
@@ -490,13 +484,6 @@ func Tgkill(tgid int, tid int, sig int) (errno int) {
 	return
 }
 
-func Time(t *Time_t) (tt Time_t, errno int) {
-	r0, _, e1 := Syscall(SYS_TIME, uintptr(unsafe.Pointer(t)), 0, 0)
-	tt = Time_t(r0)
-	errno = int(e1)
-	return
-}
-
 func Times(tms *Tms) (ticks uintptr, errno int) {
 	r0, _, e1 := Syscall(SYS_TIMES, uintptr(unsafe.Pointer(tms)), 0, 0)
 	ticks = uintptr(r0)
@@ -553,11 +540,11 @@ func Utime(path string, buf *Utimbuf) (errno int) {
 }
 
 func Write(fd int, p []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)))
+	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -805,22 +792,22 @@ func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int) {
 }
 
 func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall6(SYS_RECVFROM, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
+	r0, _, e1 := Syscall6(SYS_RECVFROM, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	_, _, e1 := Syscall6(SYS_SENDTO, uintptr(s), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
+	_, _, e1 := Syscall6(SYS_SENDTO, uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
 	errno = int(e1)
 	return
 }
diff --git a/src/pkg/syscall/zsyscall_linux_arm.go b/src/pkg/syscall/zsyscall_linux_arm.go
index 1d0eb6bce3..dc23c4468a 100644
--- a/src/pkg/syscall/zsyscall_linux_arm.go
+++ b/src/pkg/syscall/zsyscall_linux_arm.go
@@ -38,11 +38,11 @@ func futimesat(dirfd int, path *byte, times *[2]Timeval) (errno int) {
 }
 
 func Getcwd(buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_GETCWD, uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)), 0)
+	r0, _, e1 := Syscall(SYS_GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -139,11 +139,11 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (errno int) {
 }
 
 func EpollWait(epfd int, events []EpollEvent, msec int) (n int, errno int) {
-	var _p0 *EpollEvent
+	var _p0 unsafe.Pointer
 	if len(events) > 0 {
-		_p0 = &events[0]
+		_p0 = unsafe.Pointer(&events[0])
 	}
-	r0, _, e1 := Syscall6(SYS_EPOLL_WAIT, uintptr(epfd), uintptr(unsafe.Pointer(_p0)), uintptr(len(events)), uintptr(msec), 0, 0)
+	r0, _, e1 := Syscall6(SYS_EPOLL_WAIT, uintptr(epfd), uintptr(_p0), uintptr(len(events)), uintptr(msec), 0, 0)
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -216,11 +216,11 @@ func Ftruncate(fd int, length int64) (errno int) {
 }
 
 func Getdents(fd int, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -269,12 +269,6 @@ func Gettid() (tid int) {
 	return
 }
 
-func Gettimeofday(tv *Timeval) (errno int) {
-	_, _, e1 := Syscall(SYS_GETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
-	errno = int(e1)
-	return
-}
-
 func Kill(pid int, sig int) (errno int) {
 	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(sig), 0)
 	errno = int(e1)
@@ -282,11 +276,11 @@ func Kill(pid int, sig int) (errno int) {
 }
 
 func Klogctl(typ int, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_SYSLOG, uintptr(typ), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_SYSLOG, uintptr(typ), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -341,44 +335,44 @@ func PivotRoot(newroot string, putold string) (errno int) {
 }
 
 func Pread(fd int, p []byte, offset int64) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall6(SYS_PREAD64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
+	r0, _, e1 := Syscall6(SYS_PREAD64, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Pwrite(fd int, p []byte, offset int64) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall6(SYS_PWRITE64, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
+	r0, _, e1 := Syscall6(SYS_PWRITE64, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Read(fd int, p []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)))
+	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func Readlink(path string, buf []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)))
+	r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -403,21 +397,21 @@ func Rmdir(path string) (errno int) {
 }
 
 func Setdomainname(p []byte) (errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	_, _, e1 := Syscall(SYS_SETDOMAINNAME, uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), 0)
+	_, _, e1 := Syscall(SYS_SETDOMAINNAME, uintptr(_p0), uintptr(len(p)), 0)
 	errno = int(e1)
 	return
 }
 
 func Sethostname(p []byte) (errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	_, _, e1 := Syscall(SYS_SETHOSTNAME, uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), 0)
+	_, _, e1 := Syscall(SYS_SETHOSTNAME, uintptr(_p0), uintptr(len(p)), 0)
 	errno = int(e1)
 	return
 }
@@ -490,13 +484,6 @@ func Tgkill(tgid int, tid int, sig int) (errno int) {
 	return
 }
 
-func Time(t *Time_t) (tt Time_t, errno int) {
-	r0, _, e1 := Syscall(SYS_TIME, uintptr(unsafe.Pointer(t)), 0, 0)
-	tt = Time_t(r0)
-	errno = int(e1)
-	return
-}
-
 func Times(tms *Tms) (ticks uintptr, errno int) {
 	r0, _, e1 := Syscall(SYS_TIMES, uintptr(unsafe.Pointer(tms)), 0, 0)
 	ticks = uintptr(r0)
@@ -553,11 +540,11 @@ func Utime(path string, buf *Utimbuf) (errno int) {
 }
 
 func Write(fd int, p []byte) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)))
+	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	errno = int(e1)
 	return
@@ -641,22 +628,22 @@ func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int) {
 }
 
 func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(p) > 0 {
-		_p0 = &p[0]
+		_p0 = unsafe.Pointer(&p[0])
 	}
-	r0, _, e1 := Syscall6(SYS_RECVFROM, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
+	r0, _, e1 := Syscall6(SYS_RECVFROM, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
 	n = int(r0)
 	errno = int(e1)
 	return
 }
 
 func sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (errno int) {
-	var _p0 *byte
+	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
-		_p0 = &buf[0]
+		_p0 = unsafe.Pointer(&buf[0])
 	}
-	_, _, e1 := Syscall6(SYS_SENDTO, uintptr(s), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
+	_, _, e1 := Syscall6(SYS_SENDTO, uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
 	errno = int(e1)
 	return
 }
@@ -806,3 +793,16 @@ func Statfs(path string, buf *Statfs_t) (errno int) {
 	errno = int(e1)
 	return
 }
+
+func Gettimeofday(tv *Timeval) (errno int) {
+	_, _, e1 := Syscall(SYS_GETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
+	errno = int(e1)
+	return
+}
+
+func Time(t *Time_t) (tt Time_t, errno int) {
+	r0, _, e1 := Syscall(SYS_TIME, uintptr(unsafe.Pointer(t)), 0, 0)
+	tt = Time_t(r0)
+	errno = int(e1)
+	return
+}