mirror of
https://github.com/langhuihui/monibuca.git
synced 2025-12-24 13:48:04 +08:00
486 lines
25 KiB
Go
486 lines
25 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package elfexec
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import (
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"debug/elf"
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"fmt"
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"reflect"
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"strings"
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"testing"
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)
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func TestGetBase(t *testing.T) {
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fhExec := &elf.FileHeader{
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Type: elf.ET_EXEC,
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}
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fhRel := &elf.FileHeader{
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Type: elf.ET_REL,
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}
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fhDyn := &elf.FileHeader{
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Type: elf.ET_DYN,
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}
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lsOffset := &elf.ProgHeader{
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Vaddr: 0x400000,
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Off: 0x200000,
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}
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kernelHeader := &elf.ProgHeader{
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Vaddr: 0xffffffff81000000,
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}
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kernelAslrHeader := &elf.ProgHeader{
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Vaddr: 0xffffffff80200000,
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Off: 0x1000,
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}
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// Kernel PIE header with vaddr aligned to a 4k boundary
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kernelPieAlignedHeader := &elf.ProgHeader{
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Vaddr: 0xffff800010010000,
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Off: 0x10000,
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}
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// Kernel PIE header with vaddr that doesn't fall on a 4k boundary
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kernelPieUnalignedHeader := &elf.ProgHeader{
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Vaddr: 0xffffffc010080800,
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Off: 0x10800,
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}
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ppc64KernelHeader := &elf.ProgHeader{
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Vaddr: 0xc000000000000000,
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}
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testcases := []struct {
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label string
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fh *elf.FileHeader
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loadSegment *elf.ProgHeader
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stextOffset *uint64
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start, limit, offset uint64
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want uint64
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wanterr bool
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}{
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{"exec", fhExec, nil, nil, 0x400000, 0, 0, 0, false},
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{"exec offset", fhExec, lsOffset, nil, 0x400000, 0x800000, 0, 0x200000, false},
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{"exec offset 2", fhExec, lsOffset, nil, 0x200000, 0x600000, 0, 0, false},
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{"exec nomap", fhExec, nil, nil, 0, 0, 0, 0, false},
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{"exec kernel", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0xffffffff82000198, 0xffffffff83000198, 0, 0x1000000, false},
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{"exec kernel", fhExec, kernelHeader, uint64p(0xffffffff810002b8), 0xffffffff81000000, 0xffffffffa0000000, 0x0, 0x0, false},
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{"exec kernel ASLR", fhExec, kernelHeader, uint64p(0xffffffff810002b8), 0xffffffff81000000, 0xffffffffa0000000, 0xffffffff81000000, 0x0, false},
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// TODO(aalexand): Figure out where this test case exactly comes from and
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// whether it's still relevant.
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{"exec kernel ASLR 2", fhExec, kernelAslrHeader, nil, 0xffffffff83e00000, 0xfffffffffc3fffff, 0x3c00000, 0x3c00000, false},
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{"exec PPC64 kernel", fhExec, ppc64KernelHeader, uint64p(0xc000000000000000), 0xc000000000000000, 0xd00000001a730000, 0x0, 0x0, false},
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{"exec chromeos kernel", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0, 0x10197, 0, 0x7efffe68, false},
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{"exec chromeos kernel 2", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0, 0x10198, 0, 0x7efffe68, false},
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{"exec chromeos kernel 3", fhExec, kernelHeader, uint64p(0xffffffff81000198), 0x198, 0x100000, 0, 0x7f000000, false},
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{"exec chromeos kernel 4", fhExec, kernelHeader, uint64p(0xffffffff81200198), 0x198, 0x100000, 0, 0x7ee00000, false},
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{"exec chromeos kernel unremapped", fhExec, kernelHeader, uint64p(0xffffffff810001c8), 0xffffffff834001c8, 0xffffffffc0000000, 0xffffffff834001c8, 0x2400000, false},
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{"dyn", fhDyn, nil, nil, 0x200000, 0x300000, 0, 0x200000, false},
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{"dyn map", fhDyn, lsOffset, nil, 0x0, 0x300000, 0, 0xFFFFFFFFFFE00000, false},
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{"dyn nomap", fhDyn, nil, nil, 0x0, 0x0, 0, 0, false},
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{"dyn map+offset", fhDyn, lsOffset, nil, 0x900000, 0xa00000, 0x200000, 0x500000, false},
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{"dyn kernel", fhDyn, kernelPieAlignedHeader, uint64p(0xffff800010000000), 0xffff800010000000, 0xffff800012815c00, 0xffff800010000000, 0, false},
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{"dyn chromeos aslr kernel", fhDyn, kernelPieUnalignedHeader, uint64p(0xffffffc010080800), 0x800, 0xb7f800, 0, 0x3feff80000, false},
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{"dyn chromeos aslr kernel unremapped", fhDyn, kernelPieUnalignedHeader, uint64p(0xffffffc010080800), 0xffffffdb5d680800, 0xffffffdb5e200000, 0xffffffdb5d680800, 0x1b4d600000, false},
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{"rel", fhRel, nil, nil, 0x2000000, 0x3000000, 0, 0x2000000, false},
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{"rel nomap", fhRel, nil, nil, 0x0, ^uint64(0), 0, 0, false},
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{"rel offset", fhRel, nil, nil, 0x100000, 0x200000, 0x1, 0, true},
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}
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for _, tc := range testcases {
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base, err := GetBase(tc.fh, tc.loadSegment, tc.stextOffset, tc.start, tc.limit, tc.offset)
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if err != nil {
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if !tc.wanterr {
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t.Errorf("%s: want no error, got %v", tc.label, err)
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}
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continue
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}
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if tc.wanterr {
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t.Errorf("%s: want error, got nil", tc.label)
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continue
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}
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if base != tc.want {
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t.Errorf("%s: want 0x%x, got 0x%x", tc.label, tc.want, base)
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}
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}
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}
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func uint64p(n uint64) *uint64 {
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return &n
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}
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func TestFindProgHeaderForMapping(t *testing.T) {
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buildList := func(headers []*elf.ProgHeader) (result string) {
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builder := strings.Builder{}
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if err := builder.WriteByte('['); err != nil {
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t.Error("Failed to append '[' to the builder")
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}
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defer func() {
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if err := builder.WriteByte(']'); err != nil {
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t.Error("Failed to append ']' to the builder")
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}
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result = builder.String()
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}()
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if len(headers) == 0 {
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if _, err := builder.WriteString("nil"); err != nil {
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t.Error("Failed to append 'nil' to the builder")
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}
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return
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}
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if _, err := builder.WriteString(fmt.Sprintf("%#v", *headers[0])); err != nil {
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t.Error("Failed to append first header to the builder")
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}
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for i, h := range headers[1:] {
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if _, err := builder.WriteString(fmt.Sprintf(", %#v", *h)); err != nil {
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t.Errorf("Failed to append header %d to the builder", i+1)
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}
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}
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return
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}
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// Variuos ELF program headers for unit tests.
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tinyHeaders := []elf.ProgHeader{
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000},
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}
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tinyBadBSSHeaders := []elf.ProgHeader{
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x100, Memsz: 0x1f0, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xd80, Vaddr: 0x400d80, Paddr: 0x400d80, Filesz: 0x90, Memsz: 0x90, Align: 0x200000},
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}
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smallHeaders := []elf.ProgHeader{
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{Type: elf.PT_PHDR, Flags: elf.PF_R | elf.PF_X, Off: 0x40, Vaddr: 0x400040, Paddr: 0x400040, Filesz: 0x1f8, Memsz: 0x1f8, Align: 8},
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{Type: elf.PT_INTERP, Flags: elf.PF_R, Off: 0x238, Vaddr: 0x400238, Paddr: 0x400238, Filesz: 0x1c, Memsz: 0x1c, Align: 1},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0x400000, Paddr: 0x400000, Filesz: 0x6fc, Memsz: 0x6fc, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe10, Vaddr: 0x600e10, Paddr: 0x600e10, Filesz: 0x230, Memsz: 0x238, Align: 0x200000},
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{Type: elf.PT_DYNAMIC, Flags: elf.PF_R | elf.PF_W, Off: 0xe28, Vaddr: 0x600e28, Paddr: 0x600e28, Filesz: 0x1d0, Memsz: 0x1d0, Align: 8},
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}
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smallBadBSSHeaders := []elf.ProgHeader{
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0x200000, Paddr: 0x200000, Filesz: 0x6fc, Memsz: 0x6fc, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x700, Vaddr: 0x400700, Paddr: 0x400700, Filesz: 0x500, Memsz: 0x710, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe10, Vaddr: 0x600e10, Paddr: 0x600e10, Filesz: 0x230, Memsz: 0x238, Align: 0x200000},
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}
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mediumHeaders := []elf.ProgHeader{
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{Type: elf.PT_PHDR, Flags: elf.PF_R, Off: 0x40, Vaddr: 0x40, Paddr: 0x40, Filesz: 0x268, Memsz: 0x268, Align: 8},
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{Type: elf.PT_INTERP, Flags: elf.PF_R, Off: 0x2a8, Vaddr: 0x2a8, Paddr: 0x2a8, Filesz: 0x28, Memsz: 0x28, Align: 1},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0x51800, Memsz: 0x51800, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x51800, Vaddr: 0x251800, Paddr: 0x251800, Filesz: 0x24a8, Memsz: 0x24e8, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x53d00, Vaddr: 0x453d00, Paddr: 0x453d00, Filesz: 0x13a58, Memsz: 0x91a198, Align: 0x200000},
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{Type: elf.PT_TLS, Flags: elf.PF_R, Off: 0x51800, Vaddr: 0x51800, Paddr: 0x51800, Filesz: 0x0, Memsz: 0x38, Align: 0x8},
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{Type: elf.PT_DYNAMIC, Flags: elf.PF_R | elf.PF_W, Off: 0x51d00, Vaddr: 0x251d00, Paddr: 0x251d00, Filesz: 0x1ef0, Memsz: 0x1ef0, Align: 8},
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}
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largeHeaders := []elf.ProgHeader{
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{Type: elf.PT_PHDR, Flags: elf.PF_R, Off: 0x40, Vaddr: 0x40, Paddr: 0x40, Filesz: 0x268, Memsz: 0x268, Align: 8},
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{Type: elf.PT_INTERP, Flags: elf.PF_R, Off: 0x2a8, Vaddr: 0x2a8, Paddr: 0x2a8, Filesz: 0x28, Memsz: 0x28, Align: 1},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0x2ec5d2c0, Memsz: 0x2ec5d2c0, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x2ec5d2c0, Vaddr: 0x2ee5d2c0, Paddr: 0x2ee5d2c0, Filesz: 0x1361118, Memsz: 0x1361150, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x2ffbe440, Vaddr: 0x303be440, Paddr: 0x303be440, Filesz: 0x4637c0, Memsz: 0xc91610, Align: 0x200000},
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{Type: elf.PT_TLS, Flags: elf.PF_R, Off: 0x2ec5d2c0, Vaddr: 0x2ee5d2c0, Paddr: 0x2ee5d2c0, Filesz: 0x120, Memsz: 0x103f8, Align: 0x40},
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{Type: elf.PT_DYNAMIC, Flags: elf.PF_R | elf.PF_W, Off: 0x2ffbc9e0, Vaddr: 0x301bc9e0, Paddr: 0x301bc9e0, Filesz: 0x1f0, Memsz: 0x1f0, Align: 8},
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}
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ffmpegHeaders := []elf.ProgHeader{
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{Type: elf.PT_PHDR, Flags: elf.PF_R, Off: 0x40, Vaddr: 0x200040, Paddr: 0x200040, Filesz: 0x1f8, Memsz: 0x1f8, Align: 8},
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{Type: elf.PT_INTERP, Flags: elf.PF_R, Off: 0x238, Vaddr: 0x200238, Paddr: 0x200238, Filesz: 0x28, Memsz: 0x28, Align: 1},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0x200000, Paddr: 0x200000, Filesz: 0x48d8410, Memsz: 0x48d8410, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x48d8440, Vaddr: 0x4cd8440, Paddr: 0x4cd8440, Filesz: 0x18cbe0, Memsz: 0xd2fb70, Align: 0x200000},
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{Type: elf.PT_TLS, Flags: elf.PF_R, Off: 0x48d8440, Vaddr: 0x4cd8440, Paddr: 0x4cd8440, Filesz: 0xa8, Memsz: 0x468, Align: 0x40},
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{Type: elf.PT_DYNAMIC, Flags: elf.PF_R | elf.PF_W, Off: 0x4a63ad0, Vaddr: 0x4e63ad0, Paddr: 0x4e63ad0, Filesz: 0x200, Memsz: 0x200, Align: 8},
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}
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sentryHeaders := []elf.ProgHeader{
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{Type: elf.PT_LOAD, Flags: elf.PF_X + elf.PF_R, Off: 0x0, Vaddr: 0x7f0000000000, Paddr: 0x7f0000000000, Filesz: 0xbc64d5, Memsz: 0xbc64d5, Align: 0x1000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R, Off: 0xbc7000, Vaddr: 0x7f0000bc7000, Paddr: 0x7f0000bc7000, Filesz: 0xcd6b30, Memsz: 0xcd6b30, Align: 0x1000},
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{Type: elf.PT_LOAD, Flags: elf.PF_W + elf.PF_R, Off: 0x189e000, Vaddr: 0x7f000189e000, Paddr: 0x7f000189e000, Filesz: 0x58180, Memsz: 0x92d10, Align: 0x1000},
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}
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for _, tc := range []struct {
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desc string
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phdrs []elf.ProgHeader
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pgoff uint64
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memsz uint64
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wantHeaders []*elf.ProgHeader
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}{
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{
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desc: "no prog headers",
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phdrs: nil,
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pgoff: 0,
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memsz: 0x1000,
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wantHeaders: nil,
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},
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{
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desc: "tiny file, 4KB at offset 0 matches both headers, b/178747588",
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phdrs: tinyHeaders,
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pgoff: 0,
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memsz: 0x1000,
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wantHeaders: []*elf.ProgHeader{
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000},
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},
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},
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{
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desc: "tiny file, file offset 4KB matches no headers",
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phdrs: tinyHeaders,
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pgoff: 0x1000,
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memsz: 0x1000,
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wantHeaders: nil,
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},
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{
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desc: "tiny file with unaligned memsz matches executable segment",
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phdrs: tinyHeaders,
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pgoff: 0,
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memsz: 0xc80,
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wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000}},
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},
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{
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desc: "tiny file with unaligned offset matches data segment",
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phdrs: tinyHeaders,
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pgoff: 0xc80,
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memsz: 0x1000,
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wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000}},
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},
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{
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desc: "tiny bad BSS file, 4KB at offset 0 matches all three headers",
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phdrs: tinyBadBSSHeaders,
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pgoff: 0,
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memsz: 0x1000,
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wantHeaders: []*elf.ProgHeader{
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x100, Memsz: 0x1f0, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xd80, Vaddr: 0x400d80, Paddr: 0x400d80, Filesz: 0x90, Memsz: 0x90, Align: 0x200000},
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},
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},
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{
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desc: "small file, offset 0, memsz 4KB matches both segments",
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phdrs: smallHeaders,
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pgoff: 0,
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memsz: 0x1000,
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wantHeaders: []*elf.ProgHeader{
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0x400000, Paddr: 0x400000, Filesz: 0x6fc, Memsz: 0x6fc, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe10, Vaddr: 0x600e10, Paddr: 0x600e10, Filesz: 0x230, Memsz: 0x238, Align: 0x200000},
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},
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},
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{
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desc: "small file, offset 0, memsz 8KB matches both segments",
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phdrs: smallHeaders,
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pgoff: 0,
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memsz: 0x2000,
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wantHeaders: []*elf.ProgHeader{
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0x400000, Paddr: 0x400000, Filesz: 0x6fc, Memsz: 0x6fc, Align: 0x200000},
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{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe10, Vaddr: 0x600e10, Paddr: 0x600e10, Filesz: 0x230, Memsz: 0x238, Align: 0x200000},
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},
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},
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{
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desc: "small file, offset 4KB matches data segment",
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phdrs: smallHeaders,
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pgoff: 0x1000,
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memsz: 0x1000,
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wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe10, Vaddr: 0x600e10, Paddr: 0x600e10, Filesz: 0x230, Memsz: 0x238, Align: 0x200000}},
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},
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{
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desc: "small file, offset 8KB matches no segment",
|
|
phdrs: smallHeaders,
|
|
pgoff: 0x2000,
|
|
memsz: 0x1000,
|
|
wantHeaders: nil,
|
|
},
|
|
{
|
|
desc: "small bad BSS file, offset 0, memsz 4KB matches all three segments",
|
|
phdrs: smallBadBSSHeaders,
|
|
pgoff: 0,
|
|
memsz: 0x1000,
|
|
wantHeaders: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0x200000, Paddr: 0x200000, Filesz: 0x6fc, Memsz: 0x6fc, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x700, Vaddr: 0x400700, Paddr: 0x400700, Filesz: 0x500, Memsz: 0x710, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe10, Vaddr: 0x600e10, Paddr: 0x600e10, Filesz: 0x230, Memsz: 0x238, Align: 0x200000},
|
|
},
|
|
},
|
|
{
|
|
desc: "small bad BSS file, offset 0, memsz 8KB matches all three segments",
|
|
phdrs: smallBadBSSHeaders,
|
|
pgoff: 0,
|
|
memsz: 0x2000,
|
|
wantHeaders: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0x200000, Paddr: 0x200000, Filesz: 0x6fc, Memsz: 0x6fc, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x700, Vaddr: 0x400700, Paddr: 0x400700, Filesz: 0x500, Memsz: 0x710, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe10, Vaddr: 0x600e10, Paddr: 0x600e10, Filesz: 0x230, Memsz: 0x238, Align: 0x200000},
|
|
},
|
|
},
|
|
{
|
|
desc: "small bad BSS file, offset 4KB matches second data segment",
|
|
phdrs: smallBadBSSHeaders,
|
|
pgoff: 0x1000,
|
|
memsz: 0x1000,
|
|
wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe10, Vaddr: 0x600e10, Paddr: 0x600e10, Filesz: 0x230, Memsz: 0x238, Align: 0x200000}},
|
|
},
|
|
{
|
|
desc: "medium file large mapping that includes all address space matches executable segment, b/179920361",
|
|
phdrs: mediumHeaders,
|
|
pgoff: 0,
|
|
memsz: 0xd6e000,
|
|
wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0x51800, Memsz: 0x51800, Align: 0x200000}},
|
|
},
|
|
{
|
|
desc: "large file executable mapping matches executable segment",
|
|
phdrs: largeHeaders,
|
|
pgoff: 0,
|
|
memsz: 0x2ec5e000,
|
|
wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0x2ec5d2c0, Memsz: 0x2ec5d2c0, Align: 0x200000}},
|
|
},
|
|
{
|
|
desc: "large file first data mapping matches first data segment",
|
|
phdrs: largeHeaders,
|
|
pgoff: 0x2ec5d000,
|
|
memsz: 0x1362000,
|
|
wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x2ec5d2c0, Vaddr: 0x2ee5d2c0, Paddr: 0x2ee5d2c0, Filesz: 0x1361118, Memsz: 0x1361150, Align: 0x200000}},
|
|
},
|
|
{
|
|
desc: "large file, split second data mapping matches second data segment",
|
|
phdrs: largeHeaders,
|
|
pgoff: 0x2ffbe000,
|
|
memsz: 0xb11000,
|
|
wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0x2ffbe440, Vaddr: 0x303be440, Paddr: 0x303be440, Filesz: 0x4637c0, Memsz: 0xc91610, Align: 0x200000}},
|
|
},
|
|
{
|
|
desc: "sentry headers, mapping for last page of executable segment matches executable segment",
|
|
phdrs: sentryHeaders,
|
|
pgoff: 0xbc6000,
|
|
memsz: 0x1000,
|
|
wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_X + elf.PF_R, Off: 0x0, Vaddr: 0x7f0000000000, Paddr: 0x7f0000000000, Filesz: 0xbc64d5, Memsz: 0xbc64d5, Align: 0x1000}},
|
|
},
|
|
{
|
|
desc: "ffmpeg headers, split mapping for executable segment matches executable segment, b/193176694",
|
|
phdrs: ffmpegHeaders,
|
|
pgoff: 0,
|
|
memsz: 0x48d8000,
|
|
wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0x200000, Paddr: 0x200000, Filesz: 0x48d8410, Memsz: 0x48d8410, Align: 0x200000}},
|
|
},
|
|
{
|
|
desc: "segments with no file bits (b/195427553), mapping for executable segment matches executable segment",
|
|
phdrs: []elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R, Off: 0x0, Vaddr: 0x0, Paddr: 0x0, Filesz: 0x115000, Memsz: 0x115000, Align: 0x1000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_X + elf.PF_R, Off: 0x115000, Vaddr: 0x115000, Paddr: 0x115000, Filesz: 0x361e15, Memsz: 0x361e15, Align: 0x1000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_W + elf.PF_R, Off: 0x0, Vaddr: 0x477000, Paddr: 0x477000, Filesz: 0x0, Memsz: 0x33c, Align: 0x1000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R, Off: 0x0, Vaddr: 0x478000, Paddr: 0x478000, Filesz: 0x0, Memsz: 0x47dc28, Align: 0x1000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R, Off: 0x477000, Vaddr: 0x8f6000, Paddr: 0x8f6000, Filesz: 0x140, Memsz: 0x140, Align: 0x1000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_W + elf.PF_R, Off: 0x478000, Vaddr: 0x8f7000, Paddr: 0x8f7000, Filesz: 0x38, Memsz: 0x38, Align: 0x1000},
|
|
},
|
|
pgoff: 0x115000,
|
|
memsz: 0x362000,
|
|
wantHeaders: []*elf.ProgHeader{{Type: elf.PT_LOAD, Flags: elf.PF_X + elf.PF_R, Off: 0x115000, Vaddr: 0x115000, Paddr: 0x115000, Filesz: 0x361e15, Memsz: 0x361e15, Align: 0x1000}},
|
|
},
|
|
} {
|
|
t.Run(tc.desc, func(t *testing.T) {
|
|
gotHeaders := ProgramHeadersForMapping(tc.phdrs, tc.pgoff, tc.memsz)
|
|
if !reflect.DeepEqual(gotHeaders, tc.wantHeaders) {
|
|
t.Errorf("got program headers %q; want %q", buildList(gotHeaders), buildList(tc.wantHeaders))
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestHeaderForFileOffset(t *testing.T) {
|
|
for _, tc := range []struct {
|
|
desc string
|
|
headers []*elf.ProgHeader
|
|
fileOffset uint64
|
|
wantError bool
|
|
want *elf.ProgHeader
|
|
}{
|
|
{
|
|
desc: "no headers, want error",
|
|
headers: nil,
|
|
wantError: true,
|
|
},
|
|
{
|
|
desc: "three headers, BSS in last segment, file offset selects first header",
|
|
headers: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe70, Vaddr: 0x400e70, Paddr: 0x400e70, Filesz: 0x90, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
fileOffset: 0xc79,
|
|
want: &elf.ProgHeader{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
|
|
},
|
|
{
|
|
desc: "three headers, BSS in last segment, file offset selects second header",
|
|
headers: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe70, Vaddr: 0x400e70, Paddr: 0x400e70, Filesz: 0x90, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
fileOffset: 0xc80,
|
|
want: &elf.ProgHeader{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000},
|
|
},
|
|
{
|
|
desc: "three headers, BSS in last segment, file offset selects third header",
|
|
headers: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe70, Vaddr: 0x400e70, Paddr: 0x400e70, Filesz: 0x90, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
fileOffset: 0xef0,
|
|
want: &elf.ProgHeader{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe70, Vaddr: 0x400e70, Paddr: 0x400e70, Filesz: 0x90, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
{
|
|
desc: "three headers, BSS in last segment, file offset in uninitialized section selects third header",
|
|
headers: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe70, Vaddr: 0x400e70, Paddr: 0x400e70, Filesz: 0x90, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
fileOffset: 0xf40,
|
|
want: &elf.ProgHeader{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe70, Vaddr: 0x400e70, Paddr: 0x400e70, Filesz: 0x90, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
{
|
|
desc: "three headers, BSS in last segment, file offset past any segment gives error",
|
|
headers: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x1f0, Memsz: 0x1f0, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xe70, Vaddr: 0x400e70, Paddr: 0x400e70, Filesz: 0x90, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
fileOffset: 0xf70,
|
|
wantError: true,
|
|
},
|
|
{
|
|
desc: "three headers, BSS in second segment, file offset in mapped section selects second header",
|
|
headers: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x100, Memsz: 0x1f0, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xd80, Vaddr: 0x400d80, Paddr: 0x400d80, Filesz: 0x100, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
fileOffset: 0xd79,
|
|
want: &elf.ProgHeader{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x100, Memsz: 0x1f0, Align: 0x200000},
|
|
},
|
|
{
|
|
desc: "three headers, BSS in second segment, file offset in unmapped section gives error",
|
|
headers: []*elf.ProgHeader{
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_X, Off: 0, Vaddr: 0, Paddr: 0, Filesz: 0xc80, Memsz: 0xc80, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xc80, Vaddr: 0x200c80, Paddr: 0x200c80, Filesz: 0x100, Memsz: 0x1f0, Align: 0x200000},
|
|
{Type: elf.PT_LOAD, Flags: elf.PF_R | elf.PF_W, Off: 0xd80, Vaddr: 0x400d80, Paddr: 0x400d80, Filesz: 0x100, Memsz: 0x100, Align: 0x200000},
|
|
},
|
|
fileOffset: 0xd80,
|
|
wantError: true,
|
|
},
|
|
} {
|
|
t.Run(tc.desc, func(t *testing.T) {
|
|
got, err := HeaderForFileOffset(tc.headers, tc.fileOffset)
|
|
if (err != nil) != tc.wantError {
|
|
t.Errorf("got error %v, want any error=%v", err, tc.wantError)
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
if !reflect.DeepEqual(got, tc.want) {
|
|
t.Errorf("got program header %#v, want %#v", got, tc.want)
|
|
}
|
|
})
|
|
}
|
|
}
|