// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package elf

import (
	"io"
	"os"
)

// errorReader returns error from all operations.
type errorReader struct {
	error
}

func (r errorReader) Read(p []byte) (n int, err error) {
	return 0, r.error
}

	extname     map[Sym]string      // stores Extname symbol attribute
	elfType     map[Sym]elf.SymType // stores elf type symbol property
	elfSym      map[Sym]int32       // stores elf sym symbol property
	localElfSym map[Sym]int32       // stores "local" elf sym symbol property
	symPkg      map[Sym]string      // stores package for symbol, or library for shlib-derived syms

	for _, loc := range p.Location {
		var i int
		for i = len(loc.Line) - 1; i >= 0; i-- {
			if fn := loc.Line[i].Function; fn != nil && fn.Name != "" {
				funcName := fn.Name
				// Account for leading '.' on the PPC ELF v1 ABI.
				if funcName[0] == '.' {
					funcName = funcName[1:]
				}
				if dropRx.MatchString(funcName) {
					if keepRx == nil || !keepRx.MatchString(funcName) {
						break
					}
				}
			}
		}

			{"", 3, 0, 28, 0, 0, "", ""},
			{"", 3, 0, 29, 0, 0, "", ""},
			{"crt1.c", 4, 0, 65521, 0, 0, "", ""},
			{"/usr/src/lib/csu/i386-elf/crti.S", 4, 0, 65521, 0, 0, "", ""},
			{"<command line>", 4, 0, 65521, 0, 0, "", ""},
			{"<built-in>", 4, 0, 65521, 0, 0, "", ""},
			{"/usr/src/lib/csu/i386-elf/crti.S", 4, 0, 65521, 0, 0, "", ""},
			{"crtstuff.c", 4, 0, 65521, 0, 0, "", ""},
			{"__CTOR_LIST__", 1, 0, 14, 134518436, 0, "", ""},

// This code was originally based on the sample Linux vDSO parser at
// https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/tools/testing/selftests/vDSO/parse_vdso.c

// This implements the ELF dynamic linking spec at
// http://sco.com/developers/gabi/latest/ch5.dynamic.html

// The version section is documented at
// https://refspecs.linuxfoundation.org/LSB_3.2.0/LSB-Core-generic/LSB-Core-generic/symversion.html

// internal linking.
func elfImportedSymbols(f *elf.File) []elf.ImportedSymbol {
	syms, _ := f.DynamicSymbols()
	var imports []elf.ImportedSymbol
	for _, s := range syms {
		if (elf.ST_BIND(s.Info) == elf.STB_GLOBAL || elf.ST_BIND(s.Info) == elf.STB_WEAK) && s.Section == elf.SHN_UNDEF {
			imports = append(imports, elf.ImportedSymbol{
				Name:    s.Name,
				Library: s.Library,
				Version: s.Version,

	return nmExePath
}

var (
	nmPathOnce sync.Once
	nmExePath  string
	nmPathErr  error
)

func TestNonGoExecs(t *testing.T) {
	t.Parallel()
	testfiles := []string{
		"debug/elf/testdata/gcc-386-freebsd-exec",
		"debug/elf/testdata/gcc-amd64-linux-exec",
		"debug/macho/testdata/gcc-386-darwin-exec.base64",   // golang.org/issue/34986
		"debug/macho/testdata/gcc-amd64-darwin-exec.base64", // golang.org/issue/34986

pkg debug/elf, const EM_68K = 4
pkg debug/elf, const EM_860 = 7
pkg debug/elf, const EM_88K = 5
pkg debug/elf, const EM_960 = 19
pkg debug/elf, const EM_ALPHA = 36902
pkg debug/elf, const EM_ALPHA_STD = 41
pkg debug/elf, const EM_ARC = 45
pkg debug/elf, const EM_ARM = 40
pkg debug/elf, const EM_COLDFIRE = 52
pkg debug/elf, const EM_FR20 = 37
pkg debug/elf, const EM_H8S = 48
pkg debug/elf, const EM_H8_300 = 46

	"crypto/rsa",
	"crypto/sha1",
	"crypto/sha256",
	"crypto/sha512",
	"crypto/subtle",
	"crypto/tls",
	"crypto/x509",
	"crypto/x509/pkix",
	"database/sql/driver",
	"database/sql",
	"debug/dwarf",
	"debug/elf",
	"debug/gosym",
	"debug/macho",
	"debug/pe",
	"encoding/ascii85",
	"encoding/asn1",
	"encoding/base32",
	"encoding/base64",
	"encoding/binary",
	"encoding/csv",
	"encoding/gob",

            if (line.length > 7 && line[3] == "FILE") {
                def name = line[7]
                // These are objects added by GCC or Swift toolchains
                if (!(name in ["crt1.o", "crtstuff.c", "SwiftRT-ELF.cpp"])) {
                    def type = 'F' as char
                    symbols.add(new Symbol(name, type, false))
                }
            }
        }
        return symbols
    }