github.com/epfl-dcsl/gotee@v0.0.0-20200909122901-014b35f5e5e9/src/cmd/link/internal/amd64/obj.go (about)

     1  // Inferno utils/6l/obj.c
     2  // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/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  package amd64
    32  
    33  import (
    34  	"cmd/internal/objabi"
    35  	"cmd/internal/sys"
    36  	"cmd/link/internal/ld"
    37  	"fmt"
    38  )
    39  
    40  const ENCLMASK = 0x040000000000
    41  
    42  func Init() (*sys.Arch, ld.Arch) {
    43  	arch := sys.ArchAMD64
    44  	if objabi.GOARCH == "amd64p32" {
    45  		arch = sys.ArchAMD64P32
    46  	}
    47  
    48  	theArch := ld.Arch{
    49  		Funcalign:  funcAlign,
    50  		Maxalign:   maxAlign,
    51  		Minalign:   minAlign,
    52  		Dwarfregsp: dwarfRegSP,
    53  		Dwarfreglr: dwarfRegLR,
    54  
    55  		Adddynrel:        adddynrel,
    56  		Archinit:         archinit,
    57  		Archreloc:        archreloc,
    58  		Archrelocvariant: archrelocvariant,
    59  		Asmb:             asmb,
    60  		Elfreloc1:        elfreloc1,
    61  		Elfsetupplt:      elfsetupplt,
    62  		Gentext:          gentext,
    63  		Machoreloc1:      machoreloc1,
    64  		PEreloc1:         pereloc1,
    65  		TLSIEtoLE:        tlsIEtoLE,
    66  
    67  		Linuxdynld:     "/lib64/ld-linux-x86-64.so.2",
    68  		Freebsddynld:   "/libexec/ld-elf.so.1",
    69  		Openbsddynld:   "/usr/libexec/ld.so",
    70  		Netbsddynld:    "/libexec/ld.elf_so",
    71  		Dragonflydynld: "/usr/libexec/ld-elf.so.2",
    72  		Solarisdynld:   "/lib/amd64/ld.so.1",
    73  	}
    74  
    75  	return arch, theArch
    76  }
    77  
    78  func archinit(ctxt *ld.Link) {
    79  	switch ctxt.HeadType {
    80  	default:
    81  		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
    82  
    83  	case objabi.Hplan9: /* plan 9 */
    84  		ld.HEADR = 32 + 8
    85  
    86  		if *ld.FlagTextAddr == -1 {
    87  			*ld.FlagTextAddr = 0x200000 + int64(ld.HEADR)
    88  		}
    89  		if *ld.FlagDataAddr == -1 {
    90  			*ld.FlagDataAddr = 0
    91  		}
    92  		if *ld.FlagRound == -1 {
    93  			*ld.FlagRound = 0x200000
    94  		}
    95  
    96  	case objabi.Hdarwin: /* apple MACH */
    97  		ld.HEADR = ld.INITIAL_MACHO_HEADR
    98  		if *ld.FlagRound == -1 {
    99  			*ld.FlagRound = 4096
   100  		}
   101  		if *ld.FlagTextAddr == -1 {
   102  			*ld.FlagTextAddr = 0x1000000 + int64(ld.HEADR)
   103  		}
   104  		if *ld.FlagDataAddr == -1 {
   105  			*ld.FlagDataAddr = 0
   106  		}
   107  
   108  	case objabi.Hlinux, /* elf64 executable */
   109  		objabi.Hfreebsd,   /* freebsd */
   110  		objabi.Hnetbsd,    /* netbsd */
   111  		objabi.Hopenbsd,   /* openbsd */
   112  		objabi.Hdragonfly, /* dragonfly */
   113  		objabi.Hsolaris:   /* solaris */
   114  		ld.Elfinit(ctxt)
   115  
   116  		ld.HEADR = ld.ELFRESERVE
   117  		if *ld.FlagTextAddr == -1 {
   118  			if *ld.Relocencl {
   119  				// @aghosn here we set the address for the enclave.
   120  				//*ld.FlagTextAddr = 0x100000 + int64(ld.HEADR)
   121  				*ld.FlagTextAddr = ENCLMASK + int64(ld.HEADR)
   122  			} else {
   123  				*ld.FlagTextAddr = (1 << 22) + int64(ld.HEADR)
   124  			}
   125  		}
   126  		if *ld.FlagDataAddr == -1 {
   127  			*ld.FlagDataAddr = 0
   128  		}
   129  		if *ld.FlagRound == -1 {
   130  			*ld.FlagRound = 4096
   131  		}
   132  
   133  	case objabi.Hnacl:
   134  		ld.Elfinit(ctxt)
   135  		*ld.FlagW = true // disable dwarf, which gets confused and is useless anyway
   136  		ld.HEADR = 0x10000
   137  		ld.Funcalign = 32
   138  		if *ld.FlagTextAddr == -1 {
   139  			*ld.FlagTextAddr = 0x20000
   140  		}
   141  		if *ld.FlagDataAddr == -1 {
   142  			*ld.FlagDataAddr = 0
   143  		}
   144  		if *ld.FlagRound == -1 {
   145  			*ld.FlagRound = 0x10000
   146  		}
   147  
   148  	case objabi.Hwindows: /* PE executable */
   149  		// ld.HEADR, ld.FlagTextAddr, ld.FlagDataAddr and ld.FlagRound are set in ld.Peinit
   150  		return
   151  	}
   152  
   153  	if *ld.FlagDataAddr != 0 && *ld.FlagRound != 0 {
   154  		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(*ld.FlagDataAddr), uint32(*ld.FlagRound))
   155  	}
   156  }