segment.go

Documentation: cmd/link/internal/sym

     1  // Inferno utils/8l/asm.c
     2  // https://bitbucket.org/inferno-os/inferno-os/src/master/utils/8l/asm.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 sym
    32  
    33  // Terrible but standard terminology.
    34  // A segment describes a block of file to load into memory.
    35  // A section further describes the pieces of that block for
    36  // use in debuggers and such.
    37  
    38  type Segment struct {
    39  	Rwx      uint8  // permission as usual unix bits (5 = r-x etc)
    40  	Vaddr    uint64 // virtual address
    41  	Length   uint64 // length in memory
    42  	Fileoff  uint64 // file offset
    43  	Filelen  uint64 // length on disk
    44  	Sections []*Section
    45  }
    46  
    47  type Section struct {
    48  	Rwx     uint8
    49  	Extnum  int16
    50  	Align   int32
    51  	Name    string
    52  	Vaddr   uint64
    53  	Length  uint64
    54  	Seg     *Segment
    55  	Elfsect interface{} // an *ld.ElfShdr
    56  	Reloff  uint64
    57  	Rellen  uint64
    58  	// Relcount is the number of *host* relocations applied to this section
    59  	// (when external linking).
    60  	// Incremented atomically on multiple goroutines.
    61  	// Note: this may differ from number of Go relocations, as one Go relocation
    62  	// may turn into multiple host relocations.
    63  	Relcount uint32
    64  	Sym      LoaderSym // symbol for the section, if any
    65  	Index    uint16    // each section has a unique index, used internally
    66  }
    67
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