github.com/ader1990/go@v0.0.0-20140630135419-8c24447fa791/src/cmd/nm/goobj.go (about)

     1  // Copyright 2013 The Go Authors.  All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Parsing of Go intermediate object files and archives.
     6  
     7  package main
     8  
     9  import (
    10  	"fmt"
    11  	"os"
    12  )
    13  
    14  func goobjName(id goobj_SymID) string {
    15  	if id.Version == 0 {
    16  		return id.Name
    17  	}
    18  	return fmt.Sprintf("%s<%d>", id.Name, id.Version)
    19  }
    20  
    21  func goobjSymbols(f *os.File) []Sym {
    22  	pkg, err := goobj_Parse(f, `""`)
    23  	if err != nil {
    24  		errorf("parsing %s: %v", f.Name(), err)
    25  		return nil
    26  	}
    27  
    28  	seen := make(map[goobj_SymID]bool)
    29  
    30  	var syms []Sym
    31  	for _, s := range pkg.Syms {
    32  		seen[s.goobj_SymID] = true
    33  		sym := Sym{Addr: uint64(s.Data.Offset), Name: goobjName(s.goobj_SymID), Size: int64(s.Size), Type: s.Type.Name, Code: '?'}
    34  		switch s.Kind {
    35  		case goobj_STEXT, goobj_SELFRXSECT:
    36  			sym.Code = 'T'
    37  		case goobj_STYPE, goobj_SSTRING, goobj_SGOSTRING, goobj_SGOFUNC, goobj_SRODATA, goobj_SFUNCTAB, goobj_STYPELINK, goobj_SSYMTAB, goobj_SPCLNTAB, goobj_SELFROSECT:
    38  			sym.Code = 'R'
    39  		case goobj_SMACHOPLT, goobj_SELFSECT, goobj_SMACHO, goobj_SMACHOGOT, goobj_SNOPTRDATA, goobj_SINITARR, goobj_SDATA, goobj_SWINDOWS:
    40  			sym.Code = 'D'
    41  		case goobj_SBSS, goobj_SNOPTRBSS, goobj_STLSBSS:
    42  			sym.Code = 'B'
    43  		case goobj_SXREF, goobj_SMACHOSYMSTR, goobj_SMACHOSYMTAB, goobj_SMACHOINDIRECTPLT, goobj_SMACHOINDIRECTGOT, goobj_SFILE, goobj_SFILEPATH, goobj_SCONST, goobj_SDYNIMPORT, goobj_SHOSTOBJ:
    44  			sym.Code = 'X' // should not see
    45  		}
    46  		if s.Version != 0 {
    47  			sym.Code += 'a' - 'A'
    48  		}
    49  		syms = append(syms, sym)
    50  	}
    51  
    52  	for _, s := range pkg.Syms {
    53  		for _, r := range s.Reloc {
    54  			if !seen[r.Sym] {
    55  				seen[r.Sym] = true
    56  				sym := Sym{Name: goobjName(r.Sym), Code: 'U'}
    57  				if s.Version != 0 {
    58  					// should not happen but handle anyway
    59  					sym.Code = 'u'
    60  				}
    61  				syms = append(syms, sym)
    62  			}
    63  		}
    64  	}
    65  
    66  	return syms
    67  }