code review 157055: FreeBSD/i386 work

src/pkg/runtime/freebsd/thread.c

 // Use of this source file is governed by a BSD-style
 // license that can be found in the LICENSE file.`
 
 #include "runtime.h"
 #include "defs.h"
 #include "signals.h"
 #include "os.h"
 
 // FreeBSD's umtx_op syscall is effectively the same as Linux's futex, and
 // thus the code is largely similar. See linux/thread.c for comments.
@@ skipping 107 matching lines @@
 notewakeup(Note *n)
 {
         umtx_unlock(&n->lock);
 }
 
 void thr_start(void*);
 
 void
 newosproc(M *m, G *g, void *stk, void (*fn)(void))
 {
-        struct thr_param param;
+        ThrParam param;
 
         USED(fn);       // thr_start assumes fn == mstart
         USED(g);        // thr_start assumes g == m->g0
 
         if(0){
                 printf("newosproc stk=%p m=%p g=%p fn=%p id=%d/%d ostk=%p\n",
                         stk, m, g, fn, m->id, m->tls[0], &m);
         }
 
         runtime_memclr((byte*)&param, sizeof param);
 
         param.start_func = thr_start;
         param.arg = m;
         param.stack_base = stk;
         param.stack_size = g->stackbase - g->stackguard + 256;
-        param.child_tid = (int64*)&m->procid;
+        param.child_tid = (int32*)&m->procid;
         param.parent_tid = nil;
+        param.tls_base = (int8*)&m->tls[0];
+        param.tls_size = sizeof m->tls;
+
+        m->tls[0] = m->id;      // so 386 asm can find it
 
         thr_new(&param, sizeof param);
 }
 
 void
 osinit(void)
 {
 }
 
 // Called to initialize a new m (including the bootstrap m).
 void
 minit(void)
 {
         // Initialize signal handling
         m->gsignal = malg(32*1024);
         signalstack(m->gsignal->stackguard, 32*1024);
 }