sun support

src/libthread/asm-SunOS-sun4u.s

diff --git a/src/libthread/asm-SunOS-sun4u.s b/src/libthread/asm-SunOS-sun4u.s
new file mode 100644
index 0000000..3e95f02
--- /dev/null
+++ b/src/libthread/asm-SunOS-sun4u.s
@@ -0,0 +1,51 @@
+.globl _setlabel
+.type  _setlabel,#function
+
+_setlabel:
+	ta	3
+	st	%i0, [%o0]
+	st	%i1, [%o0+4]
+	st	%i2, [%o0+8]
+	st	%i3, [%o0+12]
+	st	%i4, [%o0+16]
+	st	%i5, [%o0+20]
+	st	%i6, [%o0+24]
+	st	%i7, [%o0+28]
+	st	%l0, [%o0+32]
+	st	%l1, [%o0+36]
+	st	%l2, [%o0+40]
+	st	%l3, [%o0+44]
+	st	%l4, [%o0+48]
+	st	%l5, [%o0+52]
+	st	%l6, [%o0+56]
+	st	%l7, [%o0+60]
+	st	%sp, [%o0+64]
+	st	%o7, [%o0+68]
+	jmpl	%o7+8, %g0
+	or	%g0, %g0, %o0
+
+.globl _gotolabel
+.type	_gotolabel,#function
+
+_gotolabel:
+	ta	3
+	ld	[%o0], %i0
+	ld	[%o0+4], %i1
+	ld	[%o0+8], %i2
+	ld	[%o0+12], %i3
+	ld	[%o0+16], %i4
+	ld	[%o0+20], %i5
+	ld	[%o0+24], %i6
+	ld	[%o0+28], %i7
+	ld	[%o0+32], %l0
+	ld	[%o0+36], %l1
+	ld	[%o0+40], %l2
+	ld	[%o0+44], %l3
+	ld	[%o0+48], %l4
+	ld	[%o0+52], %l5
+	ld	[%o0+56], %l6
+	ld	[%o0+60], %l7
+	ld	[%o0+64], %sp
+	ld	[%o0+68], %o7
+	jmpl	%o7+8, %g0
+	or	%g0, 1, %o0

src/libthread/exec-unix.c

diff --git a/src/libthread/exec-unix.c b/src/libthread/exec-unix.c
index 6e4f728..5a37e34 100644
--- a/src/libthread/exec-unix.c
+++ b/src/libthread/exec-unix.c
@@ -9,13 +9,11 @@
 	Proc *p;
 	Thread *t;
 
-print("procexec\n");
 	_threaddebug(DBGEXEC, "procexec %s", prog);
 	/* must be only thread in proc */
 	p = _threadgetproc();
 	t = p->thread;
 	if(p->threads.head != t || p->threads.head->nextt != nil){
-print("not only thread\n");
 		werrstr("not only thread in proc");
 	Bad:
 		if(pidc)
@@ -36,35 +34,26 @@
 	 * pipe to us.
 	 */
 	if(pipe(p->exec.fd) < 0)
-{
-print("pipe\n");
 		goto Bad;
-}
 	if(fcntl(p->exec.fd[1], F_SETFD, 1) < 0)
-{
-print("fcntl\n");
 		goto Bad;
-}
 
 	/* exec in parallel via the scheduler */
 	assert(p->needexec==0);
 	p->exec.prog = prog;
 	p->exec.args = args;
 	p->needexec = 1;
-print("sched\n");
 	_sched();
 
 	close(p->exec.fd[1]);
 	if((n = read(p->exec.fd[0], p->exitstr, ERRMAX-1)) > 0){	/* exec failed */
 		p->exitstr[n] = '\0';
-print("read got %s\n", p->exitstr);
 		errstr(p->exitstr, ERRMAX);
 		close(p->exec.fd[0]);
 		goto Bad;
 	}
 	close(p->exec.fd[0]);
 
-print("exec %d\n", pidc);
 	if(pidc)
 		sendul(pidc, t->ret);
 

src/libthread/sun4u.c

diff --git a/src/libthread/sun4u.c b/src/libthread/sun4u.c
new file mode 100644
index 0000000..5eb2135
--- /dev/null
+++ b/src/libthread/sun4u.c
@@ -0,0 +1,25 @@
+#include "threadimpl.h"
+
+static void
+launchersparc(int o0, int o1, int o2, int o3, int o4,
+	void (*f)(void *arg), void *arg)
+{
+	(*f)(arg);
+	threadexits(nil);
+}
+
+void
+_threadinitstack(Thread *t, void (*f)(void*), void *arg)
+{
+	ulong *tos, *stk;
+
+	tos = (ulong*)&t->stk[t->stksize&~7];
+	stk = tos;
+	--stk;
+	*--stk = (ulong)arg;
+	*--stk = (ulong)f;
+	t->sched.link = (ulong)launchersparc - 8;
+	t->sched.input[6] = 0;
+	t->sched.sp = (ulong)stk - 0x5c;
+}
+