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1 // REQUIRES: x86
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2 // RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o %t.o
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3 // RUN: echo "SECTIONS { . = SIZEOF_HEADERS; .text : { *(.text) } }" > %t.script
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4 // RUN: ld.lld -T %t.script %t.o -o %t
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5 // RUN: llvm-readobj --symbols %t | FileCheck %s
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6
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7 // Test that _start is in the correct section.
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8 // CHECK: Name: _start
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173
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9 // CHECK-NEXT: Value:
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150
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10 // CHECK-NEXT: Size: 0
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11 // CHECK-NEXT: Binding: Global
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12 // CHECK-NEXT: Type: None
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13 // CHECK-NEXT: Other: 0
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173
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14 // CHECK-NEXT: Section: dn
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15
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16 // Show that --gc-sections works when there are many sections, and that
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17 // referenced common and absolute symbols in such cases are not removed, nor are
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18 // they incorrectly attributed to the sections with index 0xFFF1 or 0xFFF2.
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19 // RUN: ld.lld %t.o -T %t.script -o %t --gc-sections
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20 // RUN: llvm-readobj --symbols --sections %t | FileCheck %s --check-prefix=GC
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21
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22 // GC: Sections [
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23 // GC-NEXT: Section {
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24 // GC-NEXT: Index: 0
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25 // GC-NEXT: Name: (0)
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26 // GC: Section {
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27 // GC-NEXT: Index: 1
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28 // GC-NEXT: Name: dn
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29 // GC: Section {
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30 // GC-NEXT: Index: 2
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31 // GC-NEXT: Name: .bss
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32 // GC: Section {
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33 // GC-NEXT: Index: 3
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34 // GC-NEXT: Name: .comment
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35 // GC: Section {
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36 // GC-NEXT: Index: 4
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37 // GC-NEXT: Name: .symtab
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38 // GC: Section {
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39 // GC-NEXT: Index: 5
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40 // GC-NEXT: Name: .shstrtab
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41 // GC: Section {
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42 // GC-NEXT: Index: 6
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43 // GC-NEXT: Name: .strtab
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44 // GC-NOT: Section {
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45
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46 // GC: Symbols [
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47 // GC-NEXT: Symbol {
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48 // GC-NEXT: Name: (0)
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49 // GC: Symbol {
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50 // GC-NEXT: Name: sdn
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51 // GC: Symbol {
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52 // GC-NEXT: Name: _start
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53 // GC: Symbol {
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54 // GC-NEXT: Name: abs
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55 // GC: Symbol {
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56 // GC-NEXT: Name: common
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57 // GC-NOT: Symbol {
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150
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58
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59 .macro gen_sections4 x
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60 .section a\x,"a"
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173
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61 .global sa\x
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62 sa\x:
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150
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63 .section b\x,"a"
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173
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64 .global sa\x
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65 sb\x:
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150
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66 .section c\x,"a"
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173
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67 .global sa\x
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68 sc\x:
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150
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69 .section d\x,"a"
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173
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70 .global sa\x
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71 sd\x:
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150
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72 .endm
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73
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74 .macro gen_sections8 x
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75 gen_sections4 a\x
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76 gen_sections4 b\x
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77 .endm
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78
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79 .macro gen_sections16 x
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80 gen_sections8 a\x
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81 gen_sections8 b\x
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82 .endm
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83
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84 .macro gen_sections32 x
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85 gen_sections16 a\x
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86 gen_sections16 b\x
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87 .endm
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88
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89 .macro gen_sections64 x
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90 gen_sections32 a\x
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91 gen_sections32 b\x
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92 .endm
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93
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94 .macro gen_sections128 x
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95 gen_sections64 a\x
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96 gen_sections64 b\x
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97 .endm
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98
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99 .macro gen_sections256 x
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100 gen_sections128 a\x
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101 gen_sections128 b\x
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102 .endm
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103
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104 .macro gen_sections512 x
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105 gen_sections256 a\x
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106 gen_sections256 b\x
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107 .endm
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108
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109 .macro gen_sections1024 x
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110 gen_sections512 a\x
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111 gen_sections512 b\x
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112 .endm
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113
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114 .macro gen_sections2048 x
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115 gen_sections1024 a\x
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116 gen_sections1024 b\x
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117 .endm
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118
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119 .macro gen_sections4096 x
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120 gen_sections2048 a\x
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121 gen_sections2048 b\x
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122 .endm
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123
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124 .macro gen_sections8192 x
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125 gen_sections4096 a\x
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126 gen_sections4096 b\x
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127 .endm
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128
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129 .macro gen_sections16384 x
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130 gen_sections8192 a\x
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131 gen_sections8192 b\x
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132 .endm
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133
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134 .macro gen_sections32768 x
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135 gen_sections16384 a\x
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136 gen_sections16384 b\x
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137 .endm
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138
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139 gen_sections32768 a
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140 gen_sections16384 b
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141 gen_sections8192 c
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142 gen_sections4096 d
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143 gen_sections2048 e
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144 gen_sections1024 f
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145 gen_sections512 g
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173
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146 gen_sections256 h
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147 gen_sections128 i
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148 gen_sections64 j
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149 gen_sections32 k
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150 gen_sections16 l
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151 gen_sections8 m
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152 gen_sections4 n
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153
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154 .global abs
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155 abs = 0x12345678
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156
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157 .comm common,4,4
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150
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158
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159 .global _start
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160 _start:
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173
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161 .quad abs
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162 .quad common
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