runtime: integrated network pollster for freebsd/arm

Update #6146

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/12927047

src/pkg/runtime/defs_freebsd_arm.h

@@ -3,6 +3,9 @@
 
 
 enum {
+	EINTR	= 0x4,
+	EFAULT  = 0xe,
+
 	PROT_NONE	= 0x0,
 	PROT_READ	= 0x1,
 	PROT_WRITE	= 0x2,
@@ -21,8 +24,6 @@ enum {
 	UMTX_OP_WAIT_UINT	= 0xb,
 	UMTX_OP_WAKE		= 0x3,
 
-	EINTR	= 0x4,
-
 	SIGHUP		= 0x1,
 	SIGINT		= 0x2,
 	SIGQUIT		= 0x3,
@@ -74,6 +75,14 @@ enum {
 	ITIMER_REAL	= 0x0,
 	ITIMER_VIRTUAL	= 0x1,
 	ITIMER_PROF	= 0x2,
+
+	EV_ADD          = 0x1,
+	EV_DELETE       = 0x2,
+	EV_CLEAR        = 0x20,
+	EV_RECEIPT      = 0x40,
+	EV_ERROR        = 0x4000,
+	EVFILT_READ     = -0x1,
+	EVFILT_WRITE    = -0x2,
 };
 
 typedef struct Rtprio Rtprio;
@@ -87,6 +96,7 @@ typedef struct Ucontext Ucontext;
 typedef struct Timespec Timespec;
 typedef struct Timeval Timeval;
 typedef struct Itimerval Itimerval;
+typedef struct Kevent Kevent;
 
 #pragma pack on
 
@@ -159,5 +169,14 @@ struct Itimerval {
 	Timeval	it_value;
 };
 
+struct Kevent {
+	uint32  ident;
+	int16   filter;
+	uint16  flags;
+	uint32  fflags;
+	int32   data;
+	byte    *udata;
+};
+
 
 #pragma pack off

src/pkg/runtime/netpoll.goc

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd,amd64 freebsd,386 linux netbsd openbsd windows
+// +build darwin freebsd linux netbsd openbsd windows
 
 package net
 

src/pkg/runtime/netpoll_kqueue.c

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd,amd64 freebsd,386 netbsd openbsd
+// +build darwin freebsd netbsd openbsd
 
 #include "runtime.h"
 #include "defs_GOOS_GOARCH.h"

src/pkg/runtime/netpoll_stub.c

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build freebsd,arm plan9
+// +build plan9
 
 #include "runtime.h"
 

src/pkg/runtime/sys_freebsd_arm.s

@@ -269,6 +269,36 @@ TEXT runtime·sigprocmask(SB),NOSPLIT,$0
 	MOVW.CS R8, (R8)
 	RET
 
+// int32 runtime·kqueue(void)
+TEXT runtime·kqueue(SB),NOSPLIT,$0
+	SWI $362	// sys_kqueue
+	RSB.CS $0, R0
+	RET
+
+// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout)
+TEXT runtime·kevent(SB),NOSPLIT,$8
+	MOVW 0(FP), R0	// kq
+	MOVW 4(FP), R1	// changelist
+	MOVW 8(FP), R2	// nchanges
+	MOVW 12(FP), R3	// eventlist
+	MOVW 16(FP), R4	// nevents
+	MOVW R4, 4(R13)
+	MOVW 20(FP), R4	// timeout
+	MOVW R4, 8(R13)
+	ADD $4, R13	// pass arg 5 and 6 on stack
+	SWI $363	// sys_kevent
+	RSB.CS $0, R0
+	SUB $4, R13
+	RET
+
+// void runtime·closeonexec(int32 fd)
+TEXT runtime·closeonexec(SB),NOSPLIT,$0
+	MOVW 0(FP), R0	// fd
+	MOVW $2, R1	// F_SETFD
+	MOVW $1, R2	// FD_CLOEXEC
+	SWI $92		// sys_fcntl
+	RET
+
 TEXT runtime·casp(SB),NOSPLIT,$0
 	B	runtime·cas(SB)