code review 4817054: runtime, syscall: use the vdso page on linux x86 for fa...

src/cmd/8l/span.c

 // Inferno utils/8l/span.c
 // http://code.google.com/p/inferno-os/source/browse/utils/8l/span.c
 //
 //      Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
 //      Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
 //      Portions Copyright © 1997-1999 Vita Nuova Limited
 //      Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
 //      Portions Copyright © 2004,2006 Bruce Ellis
 //      Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
 //      Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
@@ skipping 267 matching lines @@
                                 switch(a->index) {
                                 case D_EXTERN:
                                 case D_STATIC:
                                         return Yi32;
                                 case D_AUTO:
                                 case D_PARAM:
                                         return Yiauto;
                                 }
                                 return Yxxx;
                         }
+                        //if(a->type == D_INDIR+D_ADDR)
+                        //      print("*Ycol\n");
                         return Ycol;
                 }
                 return Ym;
         }
         switch(a->type)
         {
         case D_AL:
                 return Yal;
 
         case D_AX:
@@ skipping 836 matching lines @@
         case Zjmpcon:
                 if(t[2] == Zcallcon)
                         *andptr++ = op;
                 else
                         *andptr++ = o->op[z+1];
                 r = addrel(cursym);
                 r->off = p->pc + andptr - and;
                 r->type = D_PCREL;
                 r->siz = 4;
                 r->add = p->to.offset;
+                put4(0);
+                break;
+········
+        case Zcallind:
+                *andptr++ = op;
+                *andptr++ = o->op[z+1];
+                r = addrel(cursym);
+                r->off = p->pc + andptr - and;
+                r->type = D_ADDR;
+                r->siz = 4;
+                r->add = p->to.offset;
+                r->sym = p->to.sym;
                 put4(0);
                 break;
 
         case Zbyte:
                 v = vaddr(&p->from, &rel);
                 if(rel.siz != 0) {
                         rel.siz = op;
                         r = addrel(cursym);
                         *r = rel;
                         r->off = p->pc + andptr - and;
@@ skipping 161 matching lines @@
 void
 asmins(Prog *p)
 {
         andptr = and;
         doasm(p);
         if(andptr > and+sizeof and) {
                 print("and[] is too short - %ld byte instruction\n", andptr - and);
                 errorexit();
         }
 }