runtime: use named macros on NetBSD

It will use the full names that appear in netbsd's /usr/include/sys/syscall.h names.
This adds some compat-goo (sys_sigprocmask->SYS_sigprocmask14), which might not be pretty, but the information about whether the compat version is used is probably important, as Go will keep using interfaces even after they are considered compatibility, which has caused problems in the past.
also, the same names appear in ktrace (with the numbers).

Change-Id: Idc1bb254ee33757a39ba224d91e8fbb0331e2149
GitHub-Last-Rev: b915e8f8a323cdc2d03119c3cf18e35d08c63d18
GitHub-Pull-Request: golang/go#31594
Reviewed-on: https://go-review.googlesource.com/c/go/+/173158
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

4 files changed, 255 insertions, 145 deletions

diff --git a/src/runtime/sys_netbsd_386.s b/src/runtime/sys_netbsd_386.s
index 66f4620cab..5501e10106 100644
--- a/src/runtime/sys_netbsd_386.s
+++ b/src/runtime/sys_netbsd_386.s
@@ -10,9 +10,45 @@
 #include "go_tls.h"
 #include "textflag.h"
 
+#define CLOCK_REALTIME		0
+#define CLOCK_MONOTONIC		3
+#define FD_CLOEXEC		1
+#define F_SETFD			2
+
+#define SYS_exit			1
+#define SYS_read			3
+#define SYS_write			4
+#define SYS_open			5
+#define SYS_close			6
+#define SYS_getpid			20
+#define SYS_kill			37
+#define SYS_munmap			73
+#define SYS_madvise			75
+#define SYS_fcntl			92
+#define SYS_mmap			197
+#define SYS___sysctl			202
+#define SYS___sigaltstack14		281
+#define SYS___sigprocmask14		293
+#define SYS_getcontext			307
+#define SYS_setcontext			308
+#define SYS__lwp_create			309
+#define SYS__lwp_exit			310
+#define SYS__lwp_self			311
+#define SYS__lwp_setprivate		317
+#define SYS__lwp_kill			318
+#define SYS__lwp_unpark			321
+#define SYS___sigaction_sigtramp	340
+#define SYS_kqueue			344
+#define SYS_sched_yield			350
+#define SYS___setitimer50		425
+#define SYS___clock_gettime50		427
+#define SYS___nanosleep50		430
+#define SYS___kevent50			435
+#define SYS____lwp_park60		478
+
 // Exit the entire program (like C exit)
 TEXT runtime·exit(SB),NOSPLIT,$-4
-	MOVL	$1, AX
+	MOVL	$SYS_exit, AX
 	INT	$0x80
 	MOVL	$0xf1, 0xf1		// crash
 	RET
@@ -22,13 +58,13 @@ TEXT runtime·exitThread(SB),NOSPLIT,$0-4
 	MOVL	wait+0(FP), AX
 	// We're done using the stack.
 	MOVL	$0, (AX)
-	MOVL	$310, AX		// sys__lwp_exit
+	MOVL	$SYS__lwp_exit, AX
 	INT	$0x80
 	MOVL	$0xf1, 0xf1		// crash
 	JMP	0(PC)
 
 TEXT runtime·open(SB),NOSPLIT,$-4
-	MOVL	$5, AX
+	MOVL	$SYS_open, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$-1, AX
@@ -36,7 +72,7 @@ TEXT runtime·open(SB),NOSPLIT,$-4
 	RET
 
 TEXT runtime·closefd(SB),NOSPLIT,$-4
-	MOVL	$6, AX
+	MOVL	$SYS_close, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$-1, AX
@@ -44,7 +80,7 @@ TEXT runtime·closefd(SB),NOSPLIT,$-4
 	RET
 
 TEXT runtime·read(SB),NOSPLIT,$-4
-	MOVL	$3, AX
+	MOVL	$SYS_read, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$-1, AX
@@ -52,7 +88,7 @@ TEXT runtime·read(SB),NOSPLIT,$-4
 	RET
 
 TEXT runtime·write(SB),NOSPLIT,$-4
-	MOVL	$4, AX			// sys_write
+	MOVL	$SYS_write, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$-1, AX
@@ -74,29 +110,29 @@ TEXT runtime·usleep(SB),NOSPLIT,$24
 	LEAL	12(SP), AX
 	MOVL	AX, 4(SP)		// arg 1 - rqtp
 	MOVL	$0, 8(SP)		// arg 2 - rmtp
-	MOVL	$430, AX		// sys_nanosleep
+	MOVL	$SYS___nanosleep50, AX
 	INT	$0x80
 	RET
 
 TEXT runtime·raise(SB),NOSPLIT,$12
-	MOVL	$311, AX		// sys__lwp_self
+	MOVL	$SYS__lwp_self, AX
 	INT	$0x80
 	MOVL	$0, 0(SP)
 	MOVL	AX, 4(SP)		// arg 1 - target
 	MOVL	sig+0(FP), AX
 	MOVL	AX, 8(SP)		// arg 2 - signo
-	MOVL	$318, AX		// sys__lwp_kill
+	MOVL	$SYS__lwp_kill, AX
 	INT	$0x80
 	RET
 
 TEXT runtime·raiseproc(SB),NOSPLIT,$12
-	MOVL	$20, AX			// sys_getpid
+	MOVL	$SYS_getpid, AX
 	INT	$0x80
 	MOVL	$0, 0(SP)
 	MOVL	AX, 4(SP)		// arg 1 - pid
 	MOVL	sig+0(FP), AX
 	MOVL	AX, 8(SP)		// arg 2 - signo
-	MOVL	$37, AX			// sys_kill
+	MOVL	$SYS_kill, AX
 	INT	$0x80
 	RET
 
@@ -114,7 +150,7 @@ TEXT runtime·mmap(SB),NOSPLIT,$36
 	MOVSL				// arg 7 - offset
 	MOVL	$0, AX			// top 32 bits of file offset
 	STOSL
-	MOVL	$197, AX		// sys_mmap
+	MOVL	$SYS_mmap, AX
 	INT	$0x80
 	JAE	ok
 	MOVL	$0, p+24(FP)
@@ -126,14 +162,14 @@ ok:
 	RET
 
 TEXT runtime·munmap(SB),NOSPLIT,$-4
-	MOVL	$73, AX			// sys_munmap
+	MOVL	$SYS_munmap, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
 	RET
 
 TEXT runtime·madvise(SB),NOSPLIT,$-4
-	MOVL	$75, AX			// sys_madvise
+	MOVL	$SYS_madvise, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$-1, AX
@@ -141,16 +177,16 @@ TEXT runtime·madvise(SB),NOSPLIT,$-4
 	RET
 
 TEXT runtime·setitimer(SB),NOSPLIT,$-4
-	MOVL	$425, AX		// sys_setitimer
+	MOVL	$SYS___setitimer50, AX
 	INT	$0x80
 	RET
 
 // func walltime() (sec int64, nsec int32)
 TEXT runtime·walltime(SB), NOSPLIT, $32
 	LEAL	12(SP), BX
-	MOVL	$0, 4(SP)		// arg 1 - clock_id
+	MOVL	$CLOCK_REALTIME, 4(SP)	// arg 1 - clock_id
 	MOVL	BX, 8(SP)		// arg 2 - tp
-	MOVL	$427, AX		// sys_clock_gettime
+	MOVL	$SYS___clock_gettime50, AX
 	INT	$0x80
 
 	MOVL	12(SP), AX		// sec - l32
@@ -166,9 +202,9 @@ TEXT runtime·walltime(SB), NOSPLIT, $32
 // void nanotime(int64 *nsec)
 TEXT runtime·nanotime(SB),NOSPLIT,$32
 	LEAL	12(SP), BX
-	MOVL	$3, 4(SP)		// arg 1 - clock_id CLOCK_MONOTONIC
+	MOVL	$CLOCK_MONOTONIC, 4(SP)	// arg 1 - clock_id
 	MOVL	BX, 8(SP)		// arg 2 - tp
-	MOVL	$427, AX		// sys_clock_gettime
+	MOVL	$SYS___clock_gettime50, AX
 	INT	$0x80
 
 	MOVL	16(SP), CX		// sec - h32
@@ -187,14 +223,14 @@ TEXT runtime·nanotime(SB),NOSPLIT,$32
 	RET
 
 TEXT runtime·getcontext(SB),NOSPLIT,$-4
-	MOVL	$307, AX		// sys_getcontext
+	MOVL	$SYS_getcontext, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
 	RET
 
 TEXT runtime·sigprocmask(SB),NOSPLIT,$-4
-	MOVL	$293, AX		// sys_sigprocmask
+	MOVL	$SYS___sigprocmask14, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
@@ -203,10 +239,10 @@ TEXT runtime·sigprocmask(SB),NOSPLIT,$-4
 TEXT runtime·sigreturn_tramp(SB),NOSPLIT,$0
 	LEAL	140(SP), AX		// Load address of ucontext
 	MOVL	AX, 4(SP)
-	MOVL	$308, AX		// sys_setcontext
+	MOVL	$SYS_setcontext, AX
 	INT	$0x80
 	MOVL	$-1, 4(SP)		// Something failed...
-	MOVL	$1, AX			// sys_exit
+	MOVL	$SYS_exit, AX
 	INT	$0x80
 
 TEXT runtime·sigaction(SB),NOSPLIT,$24
@@ -220,7 +256,7 @@ TEXT runtime·sigaction(SB),NOSPLIT,$24
 	STOSL				// arg 4 - tramp
 	MOVL	$2, AX
 	STOSL				// arg 5 - vers
-	MOVL	$340, AX		// sys___sigaction_sigtramp
+	MOVL	$SYS___sigaction_sigtramp, AX
 	INT	$0x80
 	JAE	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
@@ -275,7 +311,7 @@ TEXT runtime·lwp_create(SB),NOSPLIT,$16
 	MOVL	AX, 8(SP)		// arg 2 - flags
 	MOVL	lwpid+8(FP), AX
 	MOVL	AX, 12(SP)		// arg 3 - lwpid
-	MOVL	$309, AX		// sys__lwp_create
+	MOVL	$SYS__lwp_create, AX
 	INT	$0x80
 	JCC	2(PC)
 	NEGL	AX
@@ -314,7 +350,7 @@ TEXT runtime·lwp_tramp(SB),NOSPLIT,$0
 	RET
 
 TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
-	MOVL	$281, AX		// sys___sigaltstack14
+	MOVL	$SYS___sigaltstack14, AX
 	MOVL	new+0(FP), BX
 	MOVL	old+4(FP), CX
 	INT	$0x80
@@ -336,31 +372,31 @@ TEXT runtime·settls(SB),NOSPLIT,$16
 	ADDL	$4, CX
 	MOVL	$0, 0(SP)		// syscall gap
 	MOVL	CX, 4(SP)		// arg 1 - ptr
-	MOVL	$317, AX		// sys__lwp_setprivate
+	MOVL	$SYS__lwp_setprivate, AX
 	INT	$0x80
 	JCC	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
 	RET
 
 TEXT runtime·osyield(SB),NOSPLIT,$-4
-	MOVL	$350, AX		// sys_sched_yield
+	MOVL	$SYS_sched_yield, AX
 	INT	$0x80
 	RET
 
 TEXT runtime·lwp_park(SB),NOSPLIT,$-4
-	MOVL	$478, AX		// sys__lwp_park
+	MOVL	$SYS____lwp_park60, AX
 	INT	$0x80
 	MOVL	AX, ret+24(FP)
 	RET
 
 TEXT runtime·lwp_unpark(SB),NOSPLIT,$-4
-	MOVL	$321, AX		// sys__lwp_unpark
+	MOVL	$SYS__lwp_unpark, AX
 	INT	$0x80
 	MOVL	AX, ret+8(FP)
 	RET
 
 TEXT runtime·lwp_self(SB),NOSPLIT,$-4
-	MOVL	$311, AX		// sys__lwp_self
+	MOVL	$SYS__lwp_self, AX
 	INT	$0x80
 	MOVL	AX, ret+0(FP)
 	RET
@@ -375,7 +411,7 @@ TEXT runtime·sysctl(SB),NOSPLIT,$28
 	MOVSL				// arg 4 - oldlenp
 	MOVSL				// arg 5 - newp
 	MOVSL				// arg 6 - newlen
-	MOVL	$202, AX		// sys___sysctl
+	MOVL	$SYS___sysctl, AX
 	INT	$0x80
 	JAE	4(PC)
 	NEGL	AX
@@ -389,7 +425,7 @@ GLOBL runtime·tlsoffset(SB),NOPTR,$4
 
 // int32 runtime·kqueue(void)
 TEXT runtime·kqueue(SB),NOSPLIT,$0
-	MOVL	$344, AX
+	MOVL	$SYS_kqueue, AX
 	INT	$0x80
 	JAE	2(PC)
 	NEGL	AX
@@ -398,7 +434,7 @@ TEXT runtime·kqueue(SB),NOSPLIT,$0
 
 // int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout)
 TEXT runtime·kevent(SB),NOSPLIT,$0
-	MOVL	$435, AX
+	MOVL	$SYS___kevent50, AX
 	INT	$0x80
 	JAE	2(PC)
 	NEGL	AX
@@ -407,12 +443,12 @@ TEXT runtime·kevent(SB),NOSPLIT,$0
 
 // int32 runtime·closeonexec(int32 fd)
 TEXT runtime·closeonexec(SB),NOSPLIT,$32
-	MOVL	$92, AX		// fcntl
+	MOVL	$SYS_fcntl, AX
 	// 0(SP) is where the caller PC would be; kernel skips it
 	MOVL	fd+0(FP), BX
 	MOVL	BX, 4(SP)	// fd
-	MOVL	$2, 8(SP)	// F_SETFD
-	MOVL	$1, 12(SP)	// FD_CLOEXEC
+	MOVL	$F_SETFD, 8(SP)
+	MOVL	$FD_CLOEXEC, 12(SP)
 	INT	$0x80
 	JAE	2(PC)
 	NEGL	AX
diff --git a/src/runtime/sys_netbsd_amd64.s b/src/runtime/sys_netbsd_amd64.s
index 531c227a7b..588d811287 100644
--- a/src/runtime/sys_netbsd_amd64.s
+++ b/src/runtime/sys_netbsd_amd64.s
@@ -10,12 +10,48 @@
 #include "go_tls.h"
 #include "textflag.h"
 
+#define CLOCK_REALTIME		0
+#define CLOCK_MONOTONIC		3
+#define FD_CLOEXEC		1
+#define F_SETFD			2
+
+#define SYS_exit			1
+#define SYS_read			3
+#define SYS_write			4
+#define SYS_open			5
+#define SYS_close			6
+#define SYS_getpid			20
+#define SYS_kill			37
+#define SYS_munmap			73
+#define SYS_madvise			75
+#define SYS_fcntl			92
+#define SYS_mmap			197
+#define SYS___sysctl			202
+#define SYS___sigaltstack14		281
+#define SYS___sigprocmask14		293
+#define SYS_getcontext			307
+#define SYS_setcontext			308
+#define SYS__lwp_create			309
+#define SYS__lwp_exit			310
+#define SYS__lwp_self			311
+#define SYS__lwp_setprivate		317
+#define SYS__lwp_kill			318
+#define SYS__lwp_unpark			321
+#define SYS___sigaction_sigtramp	340
+#define SYS_kqueue			344
+#define SYS_sched_yield			350
+#define SYS___setitimer50		425
+#define SYS___clock_gettime50		427
+#define SYS___nanosleep50		430
+#define SYS___kevent50			435
+#define SYS____lwp_park60		478
+
 // int32 lwp_create(void *context, uintptr flags, void *lwpid)
 TEXT runtime·lwp_create(SB),NOSPLIT,$0
 	MOVQ	ctxt+0(FP), DI
 	MOVQ	flags+8(FP), SI
 	MOVQ	lwpid+16(FP), DX
-	MOVL	$309, AX		// sys__lwp_create
+	MOVL	$SYS__lwp_create, AX
 	SYSCALL
 	JCC	2(PC)
 	NEGQ	AX
@@ -38,12 +74,12 @@ TEXT runtime·lwp_tramp(SB),NOSPLIT,$0
 	CALL	R12
 
 	// It shouldn't return. If it does, exit.
-	MOVL	$310, AX		// sys__lwp_exit
+	MOVL	$SYS__lwp_exit, AX
 	SYSCALL
 	JMP	-3(PC)			// keep exiting
 
 TEXT runtime·osyield(SB),NOSPLIT,$0
-	MOVL	$350, AX		// sys_sched_yield
+	MOVL	$SYS_sched_yield, AX
 	SYSCALL
 	RET
 
@@ -54,7 +90,7 @@ TEXT runtime·lwp_park(SB),NOSPLIT,$0
 	MOVL	unpark+16(FP), R10		// arg 4 - unpark
 	MOVQ	hint+24(FP), R8			// arg 5 - hint
 	MOVQ	unparkhint+32(FP), R9		// arg 6 - unparkhint
-	MOVL	$478, AX			// sys__lwp_park
+	MOVL	$SYS____lwp_park60, AX
 	SYSCALL
 	MOVL	AX, ret+40(FP)
 	RET
@@ -62,13 +98,13 @@ TEXT runtime·lwp_park(SB),NOSPLIT,$0
 TEXT runtime·lwp_unpark(SB),NOSPLIT,$0
 	MOVL	lwp+0(FP), DI		// arg 1 - lwp
 	MOVQ	hint+8(FP), SI		// arg 2 - hint
-	MOVL	$321, AX		// sys__lwp_unpark
+	MOVL	$SYS__lwp_unpark, AX
 	SYSCALL
 	MOVL	AX, ret+16(FP)
 	RET
 
 TEXT runtime·lwp_self(SB),NOSPLIT,$0
-	MOVL	$311, AX		// sys__lwp_self
+	MOVL	$SYS__lwp_self, AX
 	SYSCALL
 	MOVL	AX, ret+0(FP)
 	RET
@@ -76,7 +112,7 @@ TEXT runtime·lwp_self(SB),NOSPLIT,$0
 // Exit the entire program (like C exit)
 TEXT runtime·exit(SB),NOSPLIT,$-8
 	MOVL	code+0(FP), DI		// arg 1 - exit status
-	MOVL	$1, AX			// sys_exit
+	MOVL	$SYS_exit, AX
 	SYSCALL
 	MOVL	$0xf1, 0xf1		// crash
 	RET
@@ -86,7 +122,7 @@ TEXT runtime·exitThread(SB),NOSPLIT,$0-8
 	MOVQ	wait+0(FP), AX
 	// We're done using the stack.
 	MOVL	$0, (AX)
-	MOVL	$310, AX		// sys__lwp_exit
+	MOVL	$SYS__lwp_exit, AX
 	SYSCALL
 	MOVL	$0xf1, 0xf1		// crash
 	JMP	0(PC)
@@ -95,7 +131,7 @@ TEXT runtime·open(SB),NOSPLIT,$-8
 	MOVQ	name+0(FP), DI		// arg 1 pathname
 	MOVL	mode+8(FP), SI		// arg 2 flags
 	MOVL	perm+12(FP), DX		// arg 3 mode
-	MOVL	$5, AX
+	MOVL	$SYS_open, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$-1, AX
@@ -104,7 +140,7 @@ TEXT runtime·open(SB),NOSPLIT,$-8
 
 TEXT runtime·closefd(SB),NOSPLIT,$-8
 	MOVL	fd+0(FP), DI		// arg 1 fd
-	MOVL	$6, AX
+	MOVL	$SYS_close, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$-1, AX
@@ -115,7 +151,7 @@ TEXT runtime·read(SB),NOSPLIT,$-8
 	MOVL	fd+0(FP), DI		// arg 1 fd
 	MOVQ	p+8(FP), SI		// arg 2 buf
 	MOVL	n+16(FP), DX		// arg 3 count
-	MOVL	$3, AX
+	MOVL	$SYS_read, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$-1, AX
@@ -126,7 +162,7 @@ TEXT runtime·write(SB),NOSPLIT,$-8
 	MOVQ	fd+0(FP), DI		// arg 1 - fd
 	MOVQ	p+8(FP), SI		// arg 2 - buf
 	MOVL	n+16(FP), DX		// arg 3 - nbyte
-	MOVL	$4, AX			// sys_write
+	MOVL	$SYS_write, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$-1, AX
@@ -145,25 +181,25 @@ TEXT runtime·usleep(SB),NOSPLIT,$16
 
 	MOVQ	SP, DI			// arg 1 - rqtp
 	MOVQ	$0, SI			// arg 2 - rmtp
-	MOVL	$430, AX		// sys_nanosleep
+	MOVL	$SYS___nanosleep50, AX
 	SYSCALL
 	RET
 
 TEXT runtime·raise(SB),NOSPLIT,$16
-	MOVL	$311, AX		// sys__lwp_self
+	MOVL	$SYS__lwp_self, AX
 	SYSCALL
 	MOVQ	AX, DI			// arg 1 - target
 	MOVL	sig+0(FP), SI		// arg 2 - signo
-	MOVL	$318, AX		// sys__lwp_kill
+	MOVL	$SYS__lwp_kill, AX
 	SYSCALL
 	RET
 
 TEXT runtime·raiseproc(SB),NOSPLIT,$16
-	MOVL	$20, AX			// sys_getpid
+	MOVL	$SYS_getpid, AX
 	SYSCALL
 	MOVQ	AX, DI			// arg 1 - pid
 	MOVL	sig+0(FP), SI		// arg 2 - signo
-	MOVL	$37, AX			// sys_kill
+	MOVL	$SYS_kill, AX
 	SYSCALL
 	RET
 
@@ -171,15 +207,15 @@ TEXT runtime·setitimer(SB),NOSPLIT,$-8
 	MOVL	mode+0(FP), DI		// arg 1 - which
 	MOVQ	new+8(FP), SI		// arg 2 - itv
 	MOVQ	old+16(FP), DX		// arg 3 - oitv
-	MOVL	$425, AX		// sys_setitimer
+	MOVL	$SYS___setitimer50, AX
 	SYSCALL
 	RET
 
 // func walltime() (sec int64, nsec int32)
 TEXT runtime·walltime(SB), NOSPLIT, $32
-	MOVQ	$0, DI			// arg 1 - clock_id
+	MOVQ	$CLOCK_REALTIME, DI	// arg 1 - clock_id
 	LEAQ	8(SP), SI		// arg 2 - tp
-	MOVL	$427, AX		// sys_clock_gettime
+	MOVL	$SYS___clock_gettime50, AX
 	SYSCALL
 	MOVQ	8(SP), AX		// sec
 	MOVL	16(SP), DX		// nsec
@@ -190,9 +226,9 @@ TEXT runtime·walltime(SB), NOSPLIT, $32
 	RET
 
 TEXT runtime·nanotime(SB),NOSPLIT,$32
-	MOVQ	$3, DI			// arg 1 - clock_id CLOCK_MONOTONIC
+	MOVQ	$CLOCK_MONOTONIC, DI	// arg 1 - clock_id
 	LEAQ	8(SP), SI		// arg 2 - tp
-	MOVL	$427, AX		// sys_clock_gettime
+	MOVL	$SYS___clock_gettime50, AX
 	SYSCALL
 	MOVQ	8(SP), AX		// sec
 	MOVL	16(SP), DX		// nsec
@@ -206,7 +242,7 @@ TEXT runtime·nanotime(SB),NOSPLIT,$32
 
 TEXT runtime·getcontext(SB),NOSPLIT,$-8
 	MOVQ	ctxt+0(FP), DI		// arg 1 - context
-	MOVL	$307, AX		// sys_getcontext
+	MOVL	$SYS_getcontext, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
@@ -216,7 +252,7 @@ TEXT runtime·sigprocmask(SB),NOSPLIT,$0
 	MOVL	how+0(FP), DI		// arg 1 - how
 	MOVQ	new+8(FP), SI		// arg 2 - set
 	MOVQ	old+16(FP), DX		// arg 3 - oset
-	MOVL	$293, AX		// sys_sigprocmask
+	MOVL	$SYS___sigprocmask14, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
@@ -224,10 +260,10 @@ TEXT runtime·sigprocmask(SB),NOSPLIT,$0
 
 TEXT runtime·sigreturn_tramp(SB),NOSPLIT,$-8
 	MOVQ	R15, DI			// Load address of ucontext
-	MOVQ	$308, AX		// sys_setcontext
+	MOVQ	$SYS_setcontext, AX
 	SYSCALL
 	MOVQ	$-1, DI			// Something failed...
-	MOVL	$1, AX			// sys_exit
+	MOVL	$SYS_exit, AX
 	SYSCALL
 
 TEXT runtime·sigaction(SB),NOSPLIT,$-8
@@ -237,7 +273,7 @@ TEXT runtime·sigaction(SB),NOSPLIT,$-8
 					// arg 4 - tramp
 	LEAQ	runtime·sigreturn_tramp(SB), R10
 	MOVQ	$2, R8			// arg 5 - vers
-	MOVL	$340, AX		// sys___sigaction_sigtramp
+	MOVL	$SYS___sigaction_sigtramp, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
@@ -290,7 +326,7 @@ TEXT runtime·mmap(SB),NOSPLIT,$0
 	SUBQ	$16, SP
 	MOVQ	R9, 8(SP)		// arg 7 - offset (passed on stack)
 	MOVQ	$0, R9			// arg 6 - pad
-	MOVL	$197, AX		// sys_mmap
+	MOVL	$SYS_mmap, AX
 	SYSCALL
 	JCC	ok
 	ADDQ	$16, SP
@@ -306,7 +342,7 @@ ok:
 TEXT runtime·munmap(SB),NOSPLIT,$0
 	MOVQ	addr+0(FP), DI		// arg 1 - addr
 	MOVQ	n+8(FP), SI		// arg 2 - len
-	MOVL	$73, AX			// sys_munmap
+	MOVL	$SYS_munmap, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
@@ -317,7 +353,7 @@ TEXT runtime·madvise(SB),NOSPLIT,$0
 	MOVQ	addr+0(FP), DI		// arg 1 - addr
 	MOVQ	n+8(FP), SI		// arg 2 - len
 	MOVL	flags+16(FP), DX	// arg 3 - behav
-	MOVQ	$75, AX			// sys_madvise
+	MOVQ	$SYS_madvise, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$-1, AX
@@ -327,7 +363,7 @@ TEXT runtime·madvise(SB),NOSPLIT,$0
 TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
 	MOVQ	new+0(FP), DI		// arg 1 - nss
 	MOVQ	old+8(FP), SI		// arg 2 - oss
-	MOVQ	$281, AX		// sys___sigaltstack14
+	MOVQ	$SYS___sigaltstack14, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
@@ -337,7 +373,7 @@ TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
 TEXT runtime·settls(SB),NOSPLIT,$8
 	// adjust for ELF: wants to use -8(FS) for g
 	ADDQ	$8, DI			// arg 1 - ptr
-	MOVQ	$317, AX		// sys__lwp_setprivate
+	MOVQ	$SYS__lwp_setprivate, AX
 	SYSCALL
 	JCC	2(PC)
 	MOVL	$0xf1, 0xf1		// crash
@@ -350,7 +386,7 @@ TEXT runtime·sysctl(SB),NOSPLIT,$0
 	MOVQ	size+24(FP), R10		// arg 4 - oldlenp
 	MOVQ	dst+32(FP), R8		// arg 5 - newp
 	MOVQ	ndst+40(FP), R9		// arg 6 - newlen
-	MOVQ	$202, AX		// sys___sysctl
+	MOVQ	$SYS___sysctl, AX
 	SYSCALL
 	JCC 4(PC)
 	NEGQ	AX
@@ -363,7 +399,7 @@ TEXT runtime·sysctl(SB),NOSPLIT,$0
 // int32 runtime·kqueue(void)
 TEXT runtime·kqueue(SB),NOSPLIT,$0
 	MOVQ	$0, DI
-	MOVL	$344, AX
+	MOVL	$SYS_kqueue, AX
 	SYSCALL
 	JCC	2(PC)
 	NEGQ	AX
@@ -378,7 +414,7 @@ TEXT runtime·kevent(SB),NOSPLIT,$0
 	MOVQ	ev+24(FP), R10
 	MOVL	nev+32(FP), R8
 	MOVQ	ts+40(FP), R9
-	MOVL	$435, AX
+	MOVL	$SYS___kevent50, AX
 	SYSCALL
 	JCC	2(PC)
 	NEGQ	AX
@@ -388,8 +424,8 @@ TEXT runtime·kevent(SB),NOSPLIT,$0
 // void runtime·closeonexec(int32 fd)
 TEXT runtime·closeonexec(SB),NOSPLIT,$0
 	MOVL	fd+0(FP), DI	// fd
-	MOVQ	$2, SI		// F_SETFD
-	MOVQ	$1, DX		// FD_CLOEXEC
-	MOVL	$92, AX		// fcntl
+	MOVQ	$F_SETFD, SI
+	MOVQ	$FD_CLOEXEC, DX
+	MOVL	$SYS_fcntl, AX
 	SYSCALL
 	RET
diff --git a/src/runtime/sys_netbsd_arm.s b/src/runtime/sys_netbsd_arm.s
index 304075f295..e8f096807b 100644
--- a/src/runtime/sys_netbsd_arm.s
+++ b/src/runtime/sys_netbsd_arm.s
@@ -10,10 +10,48 @@
 #include "go_tls.h"
 #include "textflag.h"
 
+#define CLOCK_REALTIME		0
+#define CLOCK_MONOTONIC		3
+#define FD_CLOEXEC		1
+#define F_SETFD			2
+
+#define SWI_OS_NETBSD			0xa00000
+#define SYS_exit			SWI_OS_NETBSD | 1
+#define SYS_read			SWI_OS_NETBSD | 3
+#define SYS_write			SWI_OS_NETBSD | 4
+#define SYS_open			SWI_OS_NETBSD | 5
+#define SYS_close			SWI_OS_NETBSD | 6
+#define SYS_getpid			SWI_OS_NETBSD | 20
+#define SYS_kill			SWI_OS_NETBSD | 37
+#define SYS_munmap			SWI_OS_NETBSD | 73
+#define SYS_madvise			SWI_OS_NETBSD | 75
+#define SYS_fcntl			SWI_OS_NETBSD | 92
+#define SYS_mmap			SWI_OS_NETBSD | 197
+#define SYS___sysctl			SWI_OS_NETBSD | 202
+#define SYS___sigaltstack14		SWI_OS_NETBSD | 281
+#define SYS___sigprocmask14		SWI_OS_NETBSD | 293
+#define SYS_getcontext			SWI_OS_NETBSD | 307
+#define SYS_setcontext			SWI_OS_NETBSD | 308
+#define SYS__lwp_create			SWI_OS_NETBSD | 309
+#define SYS__lwp_exit			SWI_OS_NETBSD | 310
+#define SYS__lwp_self			SWI_OS_NETBSD | 311
+#define SYS__lwp_getprivate		SWI_OS_NETBSD | 316
+#define SYS__lwp_setprivate		SWI_OS_NETBSD | 317
+#define SYS__lwp_kill			SWI_OS_NETBSD | 318
+#define SYS__lwp_unpark			SWI_OS_NETBSD | 321
+#define SYS___sigaction_sigtramp	SWI_OS_NETBSD | 340
+#define SYS_kqueue			SWI_OS_NETBSD | 344
+#define SYS_sched_yield			SWI_OS_NETBSD | 350
+#define SYS___setitimer50		SWI_OS_NETBSD | 425
+#define SYS___clock_gettime50		SWI_OS_NETBSD | 427
+#define SYS___nanosleep50		SWI_OS_NETBSD | 430
+#define SYS___kevent50			SWI_OS_NETBSD | 435
+#define SYS____lwp_park60		SWI_OS_NETBSD | 478
+
 // Exit the entire program (like C exit)
 TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
 	MOVW code+0(FP), R0	// arg 1 exit status
-	SWI $0xa00001
+	SWI $SYS_exit
 	MOVW.CS $0, R8	// crash on syscall failure
 	MOVW.CS R8, (R8)
 	RET
@@ -28,7 +66,7 @@ storeloop:
 	STREX R2, (R0), R1      // stores R2
 	CMP $0, R1
 	BNE storeloop
-	SWI $0xa00136	// sys__lwp_exit
+	SWI $SYS__lwp_exit
 	MOVW $1, R8	// crash
 	MOVW R8, (R8)
 	JMP 0(PC)
@@ -37,14 +75,14 @@ TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0
 	MOVW name+0(FP), R0
 	MOVW mode+4(FP), R1
 	MOVW perm+8(FP), R2
-	SWI $0xa00005
+	SWI $SYS_open
 	MOVW.CS	$-1, R0
 	MOVW	R0, ret+12(FP)
 	RET
 
 TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0
 	MOVW fd+0(FP), R0
-	SWI $0xa00006
+	SWI $SYS_close
 	MOVW.CS	$-1, R0
 	MOVW	R0, ret+4(FP)
 	RET
@@ -53,7 +91,7 @@ TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0
 	MOVW fd+0(FP), R0
 	MOVW p+4(FP), R1
 	MOVW n+8(FP), R2
-	SWI $0xa00003
+	SWI $SYS_read
 	MOVW.CS	$-1, R0
 	MOVW	R0, ret+12(FP)
 	RET
@@ -62,7 +100,7 @@ TEXT runtime·write(SB),NOSPLIT|NOFRAME,$0
 	MOVW	fd+0(FP), R0	// arg 1 - fd
 	MOVW	p+4(FP), R1	// arg 2 - buf
 	MOVW	n+8(FP), R2	// arg 3 - nbyte
-	SWI $0xa00004	// sys_write
+	SWI $SYS_write
 	MOVW.CS	$-1, R0
 	MOVW	R0, ret+12(FP)
 	RET
@@ -72,12 +110,12 @@ TEXT runtime·lwp_create(SB),NOSPLIT,$0
 	MOVW ctxt+0(FP), R0
 	MOVW flags+4(FP), R1
 	MOVW lwpid+8(FP), R2
-	SWI $0xa00135	// sys__lwp_create
+	SWI $SYS__lwp_create
 	MOVW	R0, ret+12(FP)
 	RET
 
 TEXT runtime·osyield(SB),NOSPLIT,$0
-	SWI $0xa0015e	// sys_sched_yield
+	SWI $SYS_sched_yield
 	RET
 
 TEXT runtime·lwp_park(SB),NOSPLIT,$8
@@ -89,19 +127,19 @@ TEXT runtime·lwp_park(SB),NOSPLIT,$8
 	MOVW R4, 4(R13)
 	MOVW unparkhint+20(FP), R5	// arg 6 - unparkhint
 	MOVW R5, 8(R13)
-	SWI $0xa001de			// sys__lwp_park
+	SWI $SYS____lwp_park60
 	MOVW	R0, ret+24(FP)
 	RET
 
 TEXT runtime·lwp_unpark(SB),NOSPLIT,$0
 	MOVW	lwp+0(FP), R0	// arg 1 - lwp
 	MOVW	hint+4(FP), R1	// arg 2 - hint
-	SWI $0xa00141 // sys__lwp_unpark
+	SWI	$SYS__lwp_unpark
 	MOVW	R0, ret+8(FP)
 	RET
 
 TEXT runtime·lwp_self(SB),NOSPLIT,$0
-	SWI $0xa00137	// sys__lwp_self
+	SWI	$SYS__lwp_self
 	MOVW	R0, ret+0(FP)
 	RET
 
@@ -128,33 +166,33 @@ TEXT runtime·usleep(SB),NOSPLIT,$16
 
 	MOVW $4(R13), R0 // arg 1 - rqtp
 	MOVW $0, R1      // arg 2 - rmtp
-	SWI $0xa001ae	// sys_nanosleep
+	SWI $SYS___nanosleep50
 	RET
 
 TEXT runtime·raise(SB),NOSPLIT,$16
-	SWI $0xa00137	// sys__lwp_self, the returned R0 is arg 1
+	SWI	$SYS__lwp_self	// the returned R0 is arg 1
 	MOVW	sig+0(FP), R1	// arg 2 - signal
-	SWI $0xa0013e	// sys__lwp_kill
+	SWI	$SYS__lwp_kill
 	RET
 
 TEXT runtime·raiseproc(SB),NOSPLIT,$16
-	SWI $0xa00014	// sys_getpid, the returned R0 is arg 1
+	SWI	$SYS_getpid	// the returned R0 is arg 1
 	MOVW	sig+0(FP), R1	// arg 2 - signal
-	SWI $0xa00025	// sys_kill
+	SWI	$SYS_kill
 	RET
 
 TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0
 	MOVW mode+0(FP), R0	// arg 1 - which
 	MOVW new+4(FP), R1	// arg 2 - itv
 	MOVW old+8(FP), R2	// arg 3 - oitv
-	SWI $0xa001a9	// sys_setitimer
+	SWI $SYS___setitimer50
 	RET
 
 // func walltime() (sec int64, nsec int32)
 TEXT runtime·walltime(SB), NOSPLIT, $32
 	MOVW $0, R0	// CLOCK_REALTIME
 	MOVW $8(R13), R1
-	SWI $0xa001ab	// clock_gettime
+	SWI $SYS___clock_gettime50
 
 	MOVW 8(R13), R0	// sec.low
 	MOVW 12(R13), R1 // sec.high
@@ -170,7 +208,7 @@ TEXT runtime·walltime(SB), NOSPLIT, $32
 TEXT runtime·nanotime(SB), NOSPLIT, $32
 	MOVW $3, R0 // CLOCK_MONOTONIC
 	MOVW $8(R13), R1
-	SWI $0xa001ab	// clock_gettime
+	SWI $SYS___clock_gettime50
 
 	MOVW 8(R13), R0 // sec.low
 	MOVW 12(R13), R4 // sec.high
@@ -188,7 +226,7 @@ TEXT runtime·nanotime(SB), NOSPLIT, $32
 
 TEXT runtime·getcontext(SB),NOSPLIT|NOFRAME,$0
 	MOVW ctxt+0(FP), R0	// arg 1 - context
-	SWI $0xa00133	// sys_getcontext
+	SWI $SYS_getcontext
 	MOVW.CS $0, R8	// crash on syscall failure
 	MOVW.CS R8, (R8)
 	RET
@@ -197,7 +235,7 @@ TEXT runtime·sigprocmask(SB),NOSPLIT,$0
 	MOVW how+0(FP), R0	// arg 1 - how
 	MOVW new+4(FP), R1	// arg 2 - set
 	MOVW old+8(FP), R2	// arg 3 - oset
-	SWI $0xa00125	// sys_sigprocmask
+	SWI $SYS___sigprocmask14
 	MOVW.CS $0, R8	// crash on syscall failure
 	MOVW.CS R8, (R8)
 	RET
@@ -206,10 +244,10 @@ TEXT runtime·sigreturn_tramp(SB),NOSPLIT|NOFRAME,$0
 	// on entry, SP points to siginfo, we add sizeof(ucontext)
 	// to SP to get a pointer to ucontext.
 	ADD $0x80, R13, R0 // 0x80 == sizeof(UcontextT)
-	SWI $0xa00134	// sys_setcontext
+	SWI $SYS_setcontext
 	// something failed, we have to exit
 	MOVW $0x4242, R0 // magic return number
-	SWI $0xa00001	// sys_exit
+	SWI $SYS_exit
 	B -2(PC)	// continue exit
 
 TEXT runtime·sigaction(SB),NOSPLIT,$4
@@ -220,7 +258,7 @@ TEXT runtime·sigaction(SB),NOSPLIT,$4
 	MOVW $2, R4	// arg 5 - vers
 	MOVW R4, 4(R13)
 	ADD $4, R13	// pass arg 5 on stack
-	SWI $0xa00154	// sys___sigaction_sigtramp
+	SWI $SYS___sigaction_sigtramp
 	SUB $4, R13
 	MOVW.CS $3, R8	// crash on syscall failure
 	MOVW.CS R8, (R8)
@@ -266,7 +304,7 @@ TEXT runtime·mmap(SB),NOSPLIT,$12
 	MOVW $0, R6 // higher 32-bit for arg 6
 	MOVW R6, 12(R13)
 	ADD $4, R13 // pass arg 5 and arg 6 on stack
-	SWI $0xa000c5	// sys_mmap
+	SWI $SYS_mmap
 	SUB $4, R13
 	MOVW	$0, R1
 	MOVW.CS R0, R1	// if error, move to R1
@@ -278,7 +316,7 @@ TEXT runtime·mmap(SB),NOSPLIT,$12
 TEXT runtime·munmap(SB),NOSPLIT,$0
 	MOVW addr+0(FP), R0	// arg 1 - addr
 	MOVW n+4(FP), R1	// arg 2 - len
-	SWI $0xa00049	// sys_munmap
+	SWI $SYS_munmap
 	MOVW.CS $0, R8	// crash on syscall failure
 	MOVW.CS R8, (R8)
 	RET
@@ -287,7 +325,7 @@ TEXT runtime·madvise(SB),NOSPLIT,$0
 	MOVW	addr+0(FP), R0	// arg 1 - addr
 	MOVW	n+4(FP), R1	// arg 2 - len
 	MOVW	flags+8(FP), R2	// arg 3 - behav
-	SWI	$0xa0004b	// sys_madvise
+	SWI	$SYS_madvise
 	MOVW.CS	$-1, R0
 	MOVW	R0, ret+12(FP)
 	RET
@@ -295,7 +333,7 @@ TEXT runtime·madvise(SB),NOSPLIT,$0
 TEXT runtime·sigaltstack(SB),NOSPLIT|NOFRAME,$0
 	MOVW new+0(FP), R0	// arg 1 - nss
 	MOVW old+4(FP), R1	// arg 2 - oss
-	SWI $0xa00119	// sys___sigaltstack14
+	SWI $SYS___sigaltstack14
 	MOVW.CS $0, R8	// crash on syscall failure
 	MOVW.CS R8, (R8)
 	RET
@@ -310,15 +348,15 @@ TEXT runtime·sysctl(SB),NOSPLIT,$8
 	MOVW ndst+20(FP), R4	// arg 6 - newlen
 	MOVW R4, 8(R13)
 	ADD $4, R13	// pass arg 5 and 6 on stack
-	SWI $0xa000ca	// sys___sysctl
+	SWI $SYS___sysctl
 	SUB $4, R13
 	MOVW	R0, ret+24(FP)
 	RET
 
 // int32 runtime·kqueue(void)
 TEXT runtime·kqueue(SB),NOSPLIT,$0
-	SWI $0xa00158	// sys_kqueue
-	RSB.CS $0, R0
+	SWI	$SYS_kqueue
+	RSB.CS	$0, R0
 	MOVW	R0, ret+0(FP)
 	RET
 
@@ -333,7 +371,7 @@ TEXT runtime·kevent(SB),NOSPLIT,$8
 	MOVW ts+20(FP), R4	// timeout
 	MOVW R4, 8(R13)
 	ADD $4, R13	// pass arg 5 and 6 on stack
-	SWI $0xa001b3	// sys___kevent50
+	SWI $SYS___kevent50
 	RSB.CS $0, R0
 	SUB $4, R13
 	MOVW	R0, ret+24(FP)
@@ -342,9 +380,9 @@ TEXT runtime·kevent(SB),NOSPLIT,$8
 // void runtime·closeonexec(int32 fd)
 TEXT runtime·closeonexec(SB),NOSPLIT,$0
 	MOVW fd+0(FP), R0	// fd
-	MOVW $2, R1	// F_SETFD
-	MOVW $1, R2	// FD_CLOEXEC
-	SWI $0xa0005c	// sys_fcntl
+	MOVW $F_SETFD, R1	// F_SETFD
+	MOVW $FD_CLOEXEC, R2	// FD_CLOEXEC
+	SWI $SYS_fcntl
 	RET
 
 // TODO: this is only valid for ARMv7+
@@ -353,6 +391,6 @@ TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
 
 TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
 	MOVM.WP [R1, R2, R3, R12], (R13)
-	SWI $0x00a0013c // _lwp_getprivate
+	SWI $SYS__lwp_getprivate
 	MOVM.IAW    (R13), [R1, R2, R3, R12]
 	RET
diff --git a/src/runtime/sys_netbsd_arm64.s b/src/runtime/sys_netbsd_arm64.s
index ff8db73bbb..6f188ea995 100644
--- a/src/runtime/sys_netbsd_arm64.s
+++ b/src/runtime/sys_netbsd_arm64.s
@@ -10,41 +10,41 @@
 #include "go_tls.h"
 #include "textflag.h"
 
-#define	CLOCK_REALTIME		0
-#define	CLOCK_MONOTONIC		3
-#define	FD_CLOEXEC		1
-#define	F_SETFD			2
+#define CLOCK_REALTIME		0
+#define CLOCK_MONOTONIC		3
+#define FD_CLOEXEC		1
+#define F_SETFD			2
 
-#define	SYS_exit			1
-#define	SYS_read			3
-#define	SYS_write			4
-#define	SYS_open			5
-#define	SYS_close			6
-#define	SYS_getpid			20
-#define	SYS_kill			37
-#define	SYS_munmap			73
-#define	SYS_madvise			75
-#define	SYS_fcntl			92
-#define	SYS_mmap			197
-#define	SYS___sysctl			202
-#define	SYS___sigaltstack14		281
-#define	SYS___sigprocmask14		293
-#define	SYS_getcontext			307
-#define	SYS_setcontext			308
-#define	SYS__lwp_create			309
-#define	SYS__lwp_exit			310
-#define	SYS__lwp_self			311
-#define	SYS__lwp_kill			318
-#define	SYS__lwp_unpark			321
-#define	SYS___sigaction_sigtramp	340
-#define	SYS_kqueue			344
-#define	SYS_sched_yield			350
-#define	SYS___setitimer50		425
-#define	SYS___clock_gettime50		427
-#define	SYS___nanosleep50		430
-#define	SYS___kevent50			435
-#define	SYS_openat			468
-#define	SYS____lwp_park60		478
+#define SYS_exit			1
+#define SYS_read			3
+#define SYS_write			4
+#define SYS_open			5
+#define SYS_close			6
+#define SYS_getpid			20
+#define SYS_kill			37
+#define SYS_munmap			73
+#define SYS_madvise			75
+#define SYS_fcntl			92
+#define SYS_mmap			197
+#define SYS___sysctl			202
+#define SYS___sigaltstack14		281
+#define SYS___sigprocmask14		293
+#define SYS_getcontext			307
+#define SYS_setcontext			308
+#define SYS__lwp_create			309
+#define SYS__lwp_exit			310
+#define SYS__lwp_self			311
+#define SYS__lwp_kill			318
+#define SYS__lwp_unpark			321
+#define SYS___sigaction_sigtramp	340
+#define SYS_kqueue			344
+#define SYS_sched_yield			350
+#define SYS___setitimer50		425
+#define SYS___clock_gettime50		427
+#define SYS___nanosleep50		430
+#define SYS___kevent50			435
+#define SYS_openat			468
+#define SYS____lwp_park60		478
 
 // int32 lwp_create(void *context, uintptr flags, void *lwpid)
 TEXT runtime·lwp_create(SB),NOSPLIT,$0