// Assume we can read up to an offset of 1<<63 - 1.
		remaining = maxint64
	}
	return &SectionReader{r, off, off, remaining, n}
}

// SectionReader implements Read, Seek, and ReadAt on a section
// of an underlying [ReaderAt].
type SectionReader struct {
	r     ReaderAt // constant after creation
	base  int64    // constant after creation
	off   int64
	limit int64 // constant after creation

	Scattered bool
}

type Section struct {
	SectionHeader
	Relocs []Reloc

	// Embed ReaderAt for ReadAt method.
	// Do not embed SectionReader directly
	// to avoid having Read and Seek.
	// If a client wants Read and Seek it must use
	// Open() to avoid fighting over the seek offset
	// with other clients.
	io.ReaderAt
	sr *io.SectionReader
}

type File struct {
	FileHeader
	Sections  []*Section
	Progs     []*Prog
	closer    io.Closer
	gnuNeed   []verneed
	gnuVersym []byte
}

// A SectionHeader represents a single ELF section header.
type SectionHeader struct {
	Name      string
	Type      SectionType
	Flags     SectionFlag
	Addr      uint64
	Offset    uint64
	Size      uint64
	Link      uint32
	Info      uint32

	"io"
	"os"
	"strings"
)

// SectionHeader holds information about an XCOFF section header.
type SectionHeader struct {
	Name           string
	VirtualAddress uint64
	Size           uint64
	Type           uint32
	Relptr         uint64
	Nreloc         uint32
}

type Section struct {
	SectionHeader
	Relocs []Reloc
	io.ReaderAt
	sr *io.SectionReader
}

			brOff, brErr := br.Seek(offset, whence)
			srOff, srErr := sr.Seek(offset, whence)
			if (brErr != nil) != (srErr != nil) || brOff != srOff {
				t.Errorf("For whence %d, offset %d: bytes.Reader.Seek = (%v, %v) != SectionReader.Seek = (%v, %v)",
					whence, offset, brOff, brErr, srErr, srOff)
			}
		}
	}

	// And verify we can just seek past the end and get an EOF
	got, err := sr.Seek(100, SeekStart)

package macho

import (
	"bytes"
	"internal/obscuretestdata"
	"io"
	"reflect"
	"testing"
)

type fileTest struct {
	file        string
	hdr         FileHeader
	loads       []any
	sections    []*SectionHeader
	relocations map[string][]Reloc
}

var fileTests = []fileTest{
	{
		"testdata/gcc-386-darwin-exec.base64",
		FileHeader{0xfeedface, Cpu386, 0x3, 0x2, 0xc, 0x3c0, 0x85},
		[]any{

			r2 = &nobitsSectionReader{}
		}
		s.sr = io.NewSectionReader(r2, int64(s.SectionHeader.Offset), int64(s.SectionHeader.Size))
		s.ReaderAt = s.sr
		f.Sections[i] = s
	}
	for i := range f.Sections {
		var err error
		f.Sections[i].Relocs, err = readRelocs(&f.Sections[i].SectionHeader, sr)
		if err != nil {
			return nil, err
		}
	}

	return f, nil
}

	file           string
	hdr            FileHeader
	opthdr         any
	sections       []*SectionHeader
	symbols        []*Symbol
	hasNoDwarfInfo bool
}

var fileTests = []fileTest{
	{
		file: "testdata/gcc-386-mingw-obj",
		hdr:  FileHeader{0x014c, 0x000c, 0x0, 0x64a, 0x1e, 0x0, 0x104},
		sections: []*SectionHeader{
			{".text", 0, 0, 36, 500, 1440, 0, 3, 0, 0x60300020},
			{".data", 0, 0, 0, 0, 0, 0, 0, 0, 3224371264},

pkg debug/elf, type Chdr64 struct, Size uint64
pkg debug/elf, type Chdr64 struct, Type uint32
pkg debug/elf, type CompressionType int
pkg debug/elf, type R_MIPS int
pkg debug/elf, type SectionHeader struct, FileSize uint64
pkg encoding/asn1, const ClassApplication = 1
pkg encoding/asn1, const ClassApplication ideal-int
pkg encoding/asn1, const ClassContextSpecific = 2