diff --git a/src/runtime/os_solaris.c b/src/runtime/os_solaris.c
index 99c38d8..e16b8e6 100644
--- a/src/runtime/os_solaris.c
+++ b/src/runtime/os_solaris.c
@@ -292,11 +292,11 @@
 	// Call libc's malloc rather than runtime·malloc.  This will
 	// allocate space on the C heap.  We can't call runtime·malloc
 	// here because it could cause a deadlock.
-	g->m->libcall.fn = (void*)libc·malloc;
+	g->m->libcall.fn = (uintptr)(void*)libc·malloc;
 	g->m->libcall.n = 1;
 	runtime·memclr((byte*)&g->m->scratch, sizeof(g->m->scratch));
 	g->m->scratch.v[0] = (uintptr)sizeof(*sem);
-	g->m->libcall.args = (uintptr*)&g->m->scratch;
+	g->m->libcall.args = (uintptr)(uintptr*)&g->m->scratch;
 	runtime·asmcgocall(runtime·asmsysvicall6, &g->m->libcall);
 	sem = (void*)g->m->libcall.r1;
 	if(runtime·sem_init(sem, 0, 0) != 0)
@@ -315,12 +315,12 @@
 		m->ts.tv_sec = ns / 1000000000LL;
 		m->ts.tv_nsec = ns % 1000000000LL;
 
-		m->libcall.fn = (void*)libc·sem_reltimedwait_np;
+		m->libcall.fn = (uintptr)(void*)libc·sem_reltimedwait_np;
 		m->libcall.n = 2;
 		runtime·memclr((byte*)&m->scratch, sizeof(m->scratch));
 		m->scratch.v[0] = m->waitsema;
 		m->scratch.v[1] = (uintptr)&m->ts;
-		m->libcall.args = (uintptr*)&m->scratch;
+		m->libcall.args = (uintptr)(uintptr*)&m->scratch;
 		runtime·asmcgocall(runtime·asmsysvicall6, &m->libcall);
 		if(*m->perrno != 0) {
 			if(*m->perrno == ETIMEDOUT || *m->perrno == EAGAIN || *m->perrno == EINTR)
@@ -330,11 +330,11 @@
 		return 0;
 	}
 	for(;;) {
-		m->libcall.fn = (void*)libc·sem_wait;
+		m->libcall.fn = (uintptr)(void*)libc·sem_wait;
 		m->libcall.n = 1;
 		runtime·memclr((byte*)&m->scratch, sizeof(m->scratch));
 		m->scratch.v[0] = m->waitsema;
-		m->libcall.args = (uintptr*)&m->scratch;
+		m->libcall.args = (uintptr)(uintptr*)&m->scratch;
 		runtime·asmcgocall(runtime·asmsysvicall6, &m->libcall);
 		if(m->libcall.r1 == 0)
 			break;
diff --git a/src/runtime/syscall_solaris.go b/src/runtime/syscall_solaris.go
index d0a3fc8..50d3a1d 100644
--- a/src/runtime/syscall_solaris.go
+++ b/src/runtime/syscall_solaris.go
@@ -34,9 +34,9 @@
 //go:nosplit
 func syscall_sysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(fn),
+		fn:   fn,
 		n:    nargs,
-		args: unsafe.Pointer(&a1),
+		args: uintptr(unsafe.Pointer(&a1)),
 	}
 	entersyscallblock()
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
@@ -47,9 +47,9 @@
 //go:nosplit
 func syscall_rawsysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(fn),
+		fn:   fn,
 		n:    nargs,
-		args: unsafe.Pointer(&a1),
+		args: uintptr(unsafe.Pointer(&a1)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.r1, call.r2, call.err
@@ -62,9 +62,9 @@
 //go:nosplit
 func syscall_chdir(path uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_chdir),
+		fn:   uintptr(unsafe.Pointer(&libc_chdir)),
 		n:    1,
-		args: unsafe.Pointer(&path),
+		args: uintptr(unsafe.Pointer(&path)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.err
@@ -73,9 +73,9 @@
 //go:nosplit
 func syscall_chroot(path uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_chroot),
+		fn:   uintptr(unsafe.Pointer(&libc_chroot)),
 		n:    1,
-		args: unsafe.Pointer(&path),
+		args: uintptr(unsafe.Pointer(&path)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.err
@@ -89,9 +89,9 @@
 
 func syscall_dlopen(name *byte, mode uintptr) (handle uintptr, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_dlopen),
+		fn:   uintptr(unsafe.Pointer(&libc_dlopen)),
 		n:    2,
-		args: unsafe.Pointer(&name),
+		args: uintptr(unsafe.Pointer(&name)),
 	}
 	entersyscallblock()
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
@@ -104,9 +104,9 @@
 
 func syscall_dlclose(handle uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_dlclose),
+		fn:   uintptr(unsafe.Pointer(&libc_dlclose)),
 		n:    1,
-		args: unsafe.Pointer(&handle),
+		args: uintptr(unsafe.Pointer(&handle)),
 	}
 	entersyscallblock()
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
@@ -116,9 +116,9 @@
 
 func syscall_dlsym(handle uintptr, name *byte) (proc uintptr, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_dlsym),
+		fn:   uintptr(unsafe.Pointer(&libc_dlsym)),
 		n:    2,
-		args: unsafe.Pointer(&handle),
+		args: uintptr(unsafe.Pointer(&handle)),
 	}
 	entersyscallblock()
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
@@ -132,9 +132,9 @@
 //go:nosplit
 func syscall_execve(path, argv, envp uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_execve),
+		fn:   uintptr(unsafe.Pointer(&libc_execve)),
 		n:    3,
-		args: unsafe.Pointer(&path),
+		args: uintptr(unsafe.Pointer(&path)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.err
@@ -149,9 +149,9 @@
 //go:nosplit
 func syscall_fcntl(fd, cmd, arg uintptr) (val, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_fcntl),
+		fn:   uintptr(unsafe.Pointer(&libc_fcntl)),
 		n:    3,
-		args: unsafe.Pointer(&fd),
+		args: uintptr(unsafe.Pointer(&fd)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.r1, call.err
@@ -160,9 +160,9 @@
 //go:nosplit
 func syscall_forkx(flags uintptr) (pid uintptr, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_forkx),
+		fn:   uintptr(unsafe.Pointer(&libc_forkx)),
 		n:    1,
-		args: unsafe.Pointer(&flags),
+		args: uintptr(unsafe.Pointer(&flags)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.r1, call.err
@@ -172,9 +172,9 @@
 	cname := new([_MAXHOSTNAMELEN]byte)
 	var args = [2]uintptr{uintptr(unsafe.Pointer(&cname[0])), _MAXHOSTNAMELEN}
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_gethostname),
+		fn:   uintptr(unsafe.Pointer(&libc_gethostname)),
 		n:    2,
-		args: unsafe.Pointer(&args[0]),
+		args: uintptr(unsafe.Pointer(&args[0])),
 	}
 	entersyscallblock()
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
@@ -189,9 +189,9 @@
 //go:nosplit
 func syscall_ioctl(fd, req, arg uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_ioctl),
+		fn:   uintptr(unsafe.Pointer(&libc_ioctl)),
 		n:    3,
-		args: unsafe.Pointer(&fd),
+		args: uintptr(unsafe.Pointer(&fd)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.err
@@ -199,9 +199,9 @@
 
 func syscall_pipe() (r, w, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&pipe1),
+		fn:   uintptr(unsafe.Pointer(&pipe1)),
 		n:    0,
-		args: unsafe.Pointer(&pipe1), // it's unused but must be non-nil, otherwise crashes
+		args: uintptr(unsafe.Pointer(&pipe1)), // it's unused but must be non-nil, otherwise crashes
 	}
 	entersyscallblock()
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
@@ -217,9 +217,9 @@
 // TODO(aram): make this panic once we stop calling fcntl(2) in net using it.
 func syscall_rawsyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_syscall),
+		fn:   uintptr(unsafe.Pointer(&libc_syscall)),
 		n:    4,
-		args: unsafe.Pointer(&trap),
+		args: uintptr(unsafe.Pointer(&trap)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.r1, call.r2, call.err
@@ -228,9 +228,9 @@
 //go:nosplit
 func syscall_setgid(gid uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_setgid),
+		fn:   uintptr(unsafe.Pointer(&libc_setgid)),
 		n:    1,
-		args: unsafe.Pointer(&gid),
+		args: uintptr(unsafe.Pointer(&gid)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.err
@@ -239,9 +239,9 @@
 //go:nosplit
 func syscall_setgroups(ngid, gid uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_setgroups),
+		fn:   uintptr(unsafe.Pointer(&libc_setgroups)),
 		n:    2,
-		args: unsafe.Pointer(&ngid),
+		args: uintptr(unsafe.Pointer(&ngid)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.err
@@ -250,9 +250,9 @@
 //go:nosplit
 func syscall_setsid() (pid, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_setsid),
+		fn:   uintptr(unsafe.Pointer(&libc_setsid)),
 		n:    0,
-		args: unsafe.Pointer(&libc_setsid), // it's unused but must be non-nil, otherwise crashes
+		args: uintptr(unsafe.Pointer(&libc_setsid)), // it's unused but must be non-nil, otherwise crashes
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.r1, call.err
@@ -261,9 +261,9 @@
 //go:nosplit
 func syscall_setuid(uid uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_setuid),
+		fn:   uintptr(unsafe.Pointer(&libc_setuid)),
 		n:    1,
-		args: unsafe.Pointer(&uid),
+		args: uintptr(unsafe.Pointer(&uid)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.err
@@ -272,9 +272,9 @@
 //go:nosplit
 func syscall_setpgid(pid, pgid uintptr) (err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_setpgid),
+		fn:   uintptr(unsafe.Pointer(&libc_setpgid)),
 		n:    2,
-		args: unsafe.Pointer(&pid),
+		args: uintptr(unsafe.Pointer(&pid)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.err
@@ -288,9 +288,9 @@
 // TODO(aram): make this panic once we stop calling fcntl(2) in net using it.
 func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_syscall),
+		fn:   uintptr(unsafe.Pointer(&libc_syscall)),
 		n:    4,
-		args: unsafe.Pointer(&trap),
+		args: uintptr(unsafe.Pointer(&trap)),
 	}
 	entersyscallblock()
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
@@ -300,9 +300,9 @@
 
 func syscall_wait4(pid uintptr, wstatus *uint32, options uintptr, rusage unsafe.Pointer) (wpid int, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_wait4),
+		fn:   uintptr(unsafe.Pointer(&libc_wait4)),
 		n:    4,
-		args: unsafe.Pointer(&pid),
+		args: uintptr(unsafe.Pointer(&pid)),
 	}
 	entersyscallblock()
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
@@ -313,9 +313,9 @@
 //go:nosplit
 func syscall_write(fd, buf, nbyte uintptr) (n, err uintptr) {
 	call := libcall{
-		fn:   unsafe.Pointer(&libc_write),
+		fn:   uintptr(unsafe.Pointer(&libc_write)),
 		n:    3,
-		args: unsafe.Pointer(&fd),
+		args: uintptr(unsafe.Pointer(&fd)),
 	}
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
 	return call.r1, call.err