1// Copyright 2018 Google Inc. All rights reserved. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package symbol_inject 16 17import ( 18 "debug/pe" 19 "strconv" 20 "testing" 21) 22 23func TestPESymbolTable(t *testing.T) { 24 testCases := []struct { 25 file *pe.File 26 symbol string 27 offset, size uint64 28 }{ 29 { 30 file: peSymbolTable1, 31 symbol: "soong_build_number", 32 offset: 0x2420, 33 size: 128, 34 }, 35 { 36 file: peSymbolTable2, 37 symbol: "symbol1", 38 offset: 0x2420, 39 size: 128, 40 }, 41 { 42 file: peSymbolTable2, 43 symbol: "symbol2", 44 offset: 0x24a0, 45 size: 128, 46 }, 47 { 48 // Test when symbol has the same value as the target symbol but is located afterwards in the list 49 file: &pe.File{ 50 FileHeader: pe.FileHeader{ 51 Machine: pe.IMAGE_FILE_MACHINE_I386, 52 }, 53 Sections: []*pe.Section{ 54 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".text", VirtualSize: 0x15e83c, VirtualAddress: 0x1000, Size: 0x15ea00, Offset: 0x600, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x60500060}}, 55 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".data", VirtualSize: 0x6a58, VirtualAddress: 0x160000, Size: 0x6c00, Offset: 0x15f000, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0600040}}, 56 }, 57 Symbols: []*pe.Symbol{ 58 &pe.Symbol{Name: "_soong_build_number", Value: 0x20, SectionNumber: 2, Type: 0x0, StorageClass: 0x2}, 59 &pe.Symbol{Name: ".data", Value: 0x20, SectionNumber: 2, Type: 0x0, StorageClass: 0x3}, 60 &pe.Symbol{Name: "_adb_device_banner", Value: 0xa0, SectionNumber: 2, Type: 0x0, StorageClass: 0x2}, 61 }, 62 }, 63 symbol: "soong_build_number", 64 offset: 0x15f020, 65 size: 128, 66 }, 67 { 68 // Test when symbol has nothing after it 69 file: &pe.File{ 70 FileHeader: pe.FileHeader{ 71 Machine: pe.IMAGE_FILE_MACHINE_AMD64, 72 }, 73 Sections: []*pe.Section{ 74 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".text", VirtualSize: 0x1cc0, VirtualAddress: 0x1000, Size: 0x1e00, Offset: 0x600, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x60500020}}, 75 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".data", VirtualSize: 0xa0, VirtualAddress: 0x3000, Size: 0x200, Offset: 0x2400, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0600040}}, 76 }, 77 Symbols: []*pe.Symbol{ 78 &pe.Symbol{Name: "soong_build_number", Value: 0x20, SectionNumber: 2, Type: 0x0, StorageClass: 0x2}, 79 }, 80 }, 81 symbol: "soong_build_number", 82 offset: 0x2420, 83 size: 128, 84 }, 85 { 86 // Test when symbol has a symbol in a different section after it 87 file: &pe.File{ 88 FileHeader: pe.FileHeader{ 89 Machine: pe.IMAGE_FILE_MACHINE_AMD64, 90 }, 91 Sections: []*pe.Section{ 92 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".text", VirtualSize: 0x1cc0, VirtualAddress: 0x1000, Size: 0x1e00, Offset: 0x600, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x60500020}}, 93 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".data", VirtualSize: 0xa0, VirtualAddress: 0x3000, Size: 0x200, Offset: 0x2400, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0600040}}, 94 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".rdata", VirtualSize: 0x5e0, VirtualAddress: 0x4000, Size: 0x600, Offset: 0x2600, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x40500040}}, 95 }, 96 Symbols: []*pe.Symbol{ 97 &pe.Symbol{Name: "soong_build_number", Value: 0x20, SectionNumber: 2, Type: 0x0, StorageClass: 0x2}, 98 &pe.Symbol{Name: "_adb_device_banner", Value: 0x30, SectionNumber: 3, Type: 0x0, StorageClass: 0x2}, 99 }, 100 }, 101 symbol: "soong_build_number", 102 offset: 0x2420, 103 size: 128, 104 }, 105 { 106 // Test when symbols are out of order 107 file: &pe.File{ 108 FileHeader: pe.FileHeader{ 109 Machine: pe.IMAGE_FILE_MACHINE_AMD64, 110 }, 111 Sections: []*pe.Section{ 112 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".text", VirtualSize: 0x1cc0, VirtualAddress: 0x1000, Size: 0x1e00, Offset: 0x600, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x60500020}}, 113 &pe.Section{SectionHeader: pe.SectionHeader{Name: ".data", VirtualSize: 0x120, VirtualAddress: 0x3000, Size: 0x200, Offset: 0x2400, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0600040}}, 114 }, 115 Symbols: []*pe.Symbol{ 116 &pe.Symbol{Name: "_adb_device_banner", Value: 0xa0, SectionNumber: 2, Type: 0x0, StorageClass: 0x2}, 117 &pe.Symbol{Name: "soong_build_number", Value: 0x20, SectionNumber: 2, Type: 0x0, StorageClass: 0x2}, 118 }, 119 }, 120 symbol: "soong_build_number", 121 offset: 0x2420, 122 size: 128, 123 }, 124 } 125 126 for i, testCase := range testCases { 127 t.Run(strconv.Itoa(i), func(t *testing.T) { 128 file, err := extractPESymbols(testCase.file) 129 if err != nil { 130 t.Error(err.Error()) 131 } 132 offset, size, err := findSymbol(file, testCase.symbol) 133 if err != nil { 134 t.Error(err.Error()) 135 } 136 if offset != testCase.offset || size != testCase.size { 137 t.Errorf("expected %x:%x, got %x:%x", testCase.offset, testCase.size, offset, size) 138 } 139 }) 140 } 141} 142