root/src/cmd/5l/obj.c

DEFINITIONS

1. linkarchinit
2. archinit

// Inferno utils/5l/obj.c
// http://code.google.com/p/inferno-os/source/browse/utils/5l/obj.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
//      Portions Copyright © 2009 The Go Authors.  All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

// Reading object files.

#include        "l.h"
#include        "../ld/lib.h"
#include        "../ld/elf.h"
#include        "../ld/dwarf.h"
#include        <ar.h>

char *thestring = "arm";
LinkArch *thelinkarch = &linkarm;

void
linkarchinit(void)
{
}

void
archinit(void)
{
        LSym *s;

        // getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
        // Go was built; see ../../make.bash.
        if(linkmode == LinkAuto && strcmp(getgoextlinkenabled(), "0") == 0)
                linkmode = LinkInternal;

        switch(HEADTYPE) {
        default:
                if(linkmode == LinkAuto)
                        linkmode = LinkInternal;
                if(linkmode == LinkExternal && strcmp(getgoextlinkenabled(), "1") != 0)
                        sysfatal("cannot use -linkmode=external with -H %s", headstr(HEADTYPE));
                break;
        case Hlinux:
        case Hfreebsd:
                break;
        }

        switch(HEADTYPE) {
        default:
                diag("unknown -H option");
                errorexit();
        case Hplan9:    /* plan 9 */
                HEADR = 32L;
                if(INITTEXT == -1)
                        INITTEXT = 4128;
                if(INITDAT == -1)
                        INITDAT = 0;
                if(INITRND == -1)
                        INITRND = 4096;
                break;
        case Hlinux:    /* arm elf */
        case Hfreebsd:
        case Hnetbsd:
        case Hnacl:
                debug['d'] = 0; // with dynamic linking
                elfinit();
                HEADR = ELFRESERVE;
                if(INITTEXT == -1)
                        INITTEXT = 0x10000 + HEADR;
                if(INITDAT == -1)
                        INITDAT = 0;
                if(INITRND == -1)
                        INITRND = 4096;
                break;
        }
        if(INITDAT != 0 && INITRND != 0)
                print("warning: -D0x%ux is ignored because of -R0x%ux\n",
                        INITDAT, INITRND);

        // embed goarm to runtime.goarm
        s = linklookup(ctxt, "runtime.goarm", 0);
        s->type = SRODATA;
        adduint8(ctxt, s, ctxt->goarm);
}