github.com/reiver/go@v0.0.0-20150109200633-1d0c7792f172/src/cmd/9l/obj.c (about)

     1  // Inferno utils/5l/obj.c
     2  // http://code.google.com/p/inferno-os/source/browse/utils/5l/obj.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  // Reading object files.
    32  
    33  #include	"l.h"
    34  #include	"../ld/lib.h"
    35  #include	"../ld/elf.h"
    36  #include	"../ld/dwarf.h"
    37  #include	<ar.h>
    38  
    39  char *thestring = "ppc64";
    40  LinkArch *thelinkarch;
    41  
    42  void
    43  linkarchinit(void)
    44  {
    45  	thestring = getgoarch();
    46  	if(strcmp(thestring, "ppc64le") == 0)
    47  		thelinkarch = &linkppc64le;
    48  	else
    49  		thelinkarch = &linkppc64;
    50  }
    51  
    52  void
    53  archinit(void)
    54  {
    55  	// getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
    56  	// Go was built; see ../../make.bash.
    57  	if(linkmode == LinkAuto && strcmp(getgoextlinkenabled(), "0") == 0)
    58  		linkmode = LinkInternal;
    59  
    60  	switch(HEADTYPE) {
    61  	default:
    62  		if(linkmode == LinkAuto)
    63  			linkmode = LinkInternal;
    64  		if(linkmode == LinkExternal && strcmp(getgoextlinkenabled(), "1") != 0)
    65  			sysfatal("cannot use -linkmode=external with -H %s", headstr(HEADTYPE));
    66  		break;
    67  	}
    68  
    69  	switch(HEADTYPE) {
    70  	default:
    71  		diag("unknown -H option");
    72  		errorexit();
    73  	case Hplan9:	/* plan 9 */
    74  		HEADR = 32L;
    75  		if(INITTEXT == -1)
    76  			INITTEXT = 4128;
    77  		if(INITDAT == -1)
    78  			INITDAT = 0;
    79  		if(INITRND == -1)
    80  			INITRND = 4096;
    81  		break;
    82  	case Hlinux:	/* ppc64 elf */
    83  		if(strcmp(thestring, "ppc64") == 0)
    84  			debug['d'] = 1;	// TODO(austin): ELF ABI v1 not supported yet
    85  		elfinit();
    86  		HEADR = ELFRESERVE;
    87  		if(INITTEXT == -1)
    88  			INITTEXT = 0x10000 + HEADR;
    89  		if(INITDAT == -1)
    90  			INITDAT = 0;
    91  		if(INITRND == -1)
    92  			INITRND = 0x10000;
    93  		break;
    94  	case Hnacl:
    95  		elfinit();
    96  		HEADR = 0x10000;
    97  		funcalign = 16;
    98  		if(INITTEXT == -1)
    99  			INITTEXT = 0x20000;
   100  		if(INITDAT == -1)
   101  			INITDAT = 0;
   102  		if(INITRND == -1)
   103  			INITRND = 0x10000;
   104  		break;
   105  	}
   106  	if(INITDAT != 0 && INITRND != 0)
   107  		print("warning: -D0x%ux is ignored because of -R0x%ux\n",
   108  			INITDAT, INITRND);
   109  }