github.com/ader1990/go@v0.0.0-20140630135419-8c24447fa791/src/cmd/ld/pass.c (about)

     1  // Inferno utils/6l/pass.c
     2  // http://code.google.com/p/inferno-os/source/browse/utils/6l/pass.c
     3  //
     4  //	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
     5  //	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
     6  //	Portions Copyright © 1997-1999 Vita Nuova Limited
     7  //	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
     8  //	Portions Copyright © 2004,2006 Bruce Ellis
     9  //	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
    10  //	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
    11  //	Portions Copyright © 2009 The Go Authors.  All rights reserved.
    12  //
    13  // Permission is hereby granted, free of charge, to any person obtaining a copy
    14  // of this software and associated documentation files (the "Software"), to deal
    15  // in the Software without restriction, including without limitation the rights
    16  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    17  // copies of the Software, and to permit persons to whom the Software is
    18  // furnished to do so, subject to the following conditions:
    19  //
    20  // The above copyright notice and this permission notice shall be included in
    21  // all copies or substantial portions of the Software.
    22  //
    23  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    24  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    25  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
    26  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    27  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    28  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    29  // THE SOFTWARE.
    30  
    31  // Code and data passes.
    32  
    33  #include	"l.h"
    34  #include	"../ld/lib.h"
    35  #include "../../pkg/runtime/stack.h"
    36  
    37  void
    38  follow(void)
    39  {
    40  	LSym *s;
    41  
    42  	if(debug['v'])
    43  		Bprint(&bso, "%5.2f follow\n", cputime());
    44  	Bflush(&bso);
    45  	
    46  	for(s = ctxt->textp; s != nil; s = s->next)
    47  		ctxt->arch->follow(ctxt, s);
    48  }
    49  
    50  void
    51  patch(void)
    52  {
    53  	LSym *s;
    54  
    55  	if(debug['v'])
    56  		Bprint(&bso, "%5.2f mkfwd\n", cputime());
    57  	Bflush(&bso);
    58  	for(s = ctxt->textp; s != nil; s = s->next)
    59  		mkfwd(s);
    60  	if(debug['v'])
    61  		Bprint(&bso, "%5.2f patch\n", cputime());
    62  	Bflush(&bso);
    63  
    64  	if(flag_shared) {
    65  		s = linklookup(ctxt, "init_array", 0);
    66  		s->type = SINITARR;
    67  		s->reachable = 1;
    68  		s->hide = 1;
    69  		addaddr(ctxt, s, linklookup(ctxt, INITENTRY, 0));
    70  	}
    71  	
    72  	for(s = ctxt->textp; s != nil; s = s->next)
    73  		linkpatch(ctxt, s);
    74  }
    75  
    76  void
    77  dostkoff(void)
    78  {
    79  	LSym *s;
    80  
    81  	for(s = ctxt->textp; s != nil; s = s->next)
    82  		ctxt->arch->addstacksplit(ctxt, s);
    83  }
    84  
    85  void
    86  span(void)
    87  {
    88  	LSym *s;
    89  
    90  	if(debug['v'])
    91  		Bprint(&bso, "%5.2f span\n", cputime());
    92  
    93  	for(s = ctxt->textp; s != nil; s = s->next)
    94  		ctxt->arch->assemble(ctxt, s);
    95  }
    96  
    97  void
    98  pcln(void)
    99  {
   100  	LSym *s;
   101  
   102  	for(s = ctxt->textp; s != nil; s = s->next)
   103  		linkpcln(ctxt, s);
   104  }