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150
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1 # REQUIRES: ppc
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2 # RUN: llvm-mc -filetype=obj -triple=powerpc %s -o %t.o
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3 # RUN: echo '.globl f, g, h; f: g: h:' | llvm-mc -filetype=obj -triple=powerpc - -o %t1.o
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4 # RUN: ld.lld -shared %t1.o -soname t1.so -o %t1.so
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5 # RUN: echo 'bl f+0x8000@plt' | llvm-mc -filetype=obj -triple=powerpc - -o %t2.o
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6
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7 ## Check we can create PLT entries for -fPIE or -fpie executable.
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8 # RUN: ld.lld -pie %t.o %t1.so %t2.o -o %t
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9 # RUN: llvm-readobj -r %t | FileCheck --check-prefix=RELOC %s
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10 # RUN: llvm-readobj -d %t | FileCheck --check-prefix=DYN %s
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11 # RUN: llvm-readelf -S %t | FileCheck --check-prefix=SEC %s
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12 # RUN: llvm-readelf -x .plt %t | FileCheck --check-prefix=HEX %s
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13 # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefixes=CHECK,PIE %s
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14
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15 ## Check we can create PLT entries for -fPIC or -fpic DSO.
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16 # RUN: ld.lld -shared %t.o %t1.so %t2.o -o %t
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17 # RUN: llvm-readobj -r %t | FileCheck --check-prefix=RELOC %s
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18 # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefixes=CHECK,SHARED %s
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19
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20 # RELOC: .rela.dyn {
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21 # RELOC-NEXT: R_PPC_ADDR32 f 0x0
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22 # RELOC-NEXT: R_PPC_ADDR32 g 0x0
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23 # RELOC-NEXT: R_PPC_ADDR32 h 0x0
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24 # RELOC-NEXT: }
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25 # RELOC-NEXT: .rela.plt {
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26 # RELOC-NEXT: R_PPC_JMP_SLOT f 0x0
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27 # RELOC-NEXT: R_PPC_JMP_SLOT g 0x0
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28 # RELOC-NEXT: R_PPC_JMP_SLOT h 0x0
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29 # RELOC-NEXT: }
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30
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207
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31 # SEC: .got PROGBITS 00020370
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32 # DYN: PPC_GOT 0x20370
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150
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33
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34 ## .got2+0x8000-0x10004 = 0x30000+0x8000-0x10004 = 65536*2+32764
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173
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35 # CHECK-LABEL: <_start>:
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36 # PIE-NEXT: bcl 20, 31, 0x10210
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150
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37 # PIE-NEXT: 10210: mflr 30
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38 # PIE-NEXT: addis 30, 30, 3
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207
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39 # PIE-NEXT: addi 30, 30, -32404
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173
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40 ## Two bl 00008000.got2.plt_pic32.f
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41 # PIE-NEXT: bl 0x10244
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42 # PIE-NEXT: bl 0x10244
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43 ## Two bl 00008000.got2.plt_pic32.g
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44 # PIE-NEXT: bl 0x10254
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45 # PIE-NEXT: bl 0x10254
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46 ## Two bl 00008000.got2.plt_pic32.h
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47 # PIE-NEXT: bl 0x10264
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48 # PIE-NEXT: bl 0x10264
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49 # PIE-NEXT: addis 30, 30, {{.*}}
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50 # PIE-NEXT: addi 30, 30, {{.*}}
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51 ## bl 00008000.plt_pic32.f
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52 # PIE-NEXT: bl 0x10274
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53 ## bl 00008000.plt_pic32.f
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54 # PIE-NEXT: bl 0x10284
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55 # SHARED-NEXT: bcl 20, 31, 0x10230
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150
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56 # SHARED-NEXT: 10230: mflr 30
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57 # SHARED-NEXT: addis 30, 30, 3
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58 # SHARED-NEXT: addi 30, 30, -32420
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173
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59 # SHARED-NEXT: bl 0x10264
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60 # SHARED-NEXT: bl 0x10264
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61 # SHARED-NEXT: bl 0x10274
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62 # SHARED-NEXT: bl 0x10274
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63 # SHARED-NEXT: bl 0x10284
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64 # SHARED-NEXT: bl 0x10284
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65 # SHARED-NEXT: addis 30, 30, {{.*}}
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66 # SHARED-NEXT: addi 30, 30, {{.*}}
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67 # SHARED-NEXT: bl 0x10294
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68 # SHARED-NEXT: bl 0x102a4
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150
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69 # CHECK-EMPTY:
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70
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71 ## -fPIC call stubs of f and g.
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173
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72 # CHECK-NEXT: <00008000.got2.plt_pic32.f>:
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150
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73 # CHECK-NEXT: lwz 11, 32760(30)
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74 # CHECK-NEXT: mtctr 11
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75 # CHECK-NEXT: bctr
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76 # CHECK-NEXT: nop
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77 # CHECK-EMPTY:
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173
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78 # CHECK-NEXT: <00008000.got2.plt_pic32.g>:
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150
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79 # CHECK-NEXT: lwz 11, 32764(30)
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80 # CHECK-NEXT: mtctr 11
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81 # CHECK-NEXT: bctr
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82 # CHECK-NEXT: nop
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83 # CHECK-EMPTY:
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84
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85 ## The -fPIC call stub of h needs two instructions addis+lwz to represent the offset 65536*1-32768.
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173
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86 # CHECK-NEXT: <00008000.got2.plt_pic32.h>:
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150
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87 # CHECK-NEXT: addis 11, 30, 1
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88 # CHECK-NEXT: lwz 11, -32768(11)
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89 # CHECK-NEXT: mtctr 11
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90 # CHECK-NEXT: bctr
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91 # CHECK-EMPTY:
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92
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93 ## -fpic call stub of f.
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173
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94 # CHECK-NEXT: <00000000.plt_pic32.f>:
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150
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95 # CHECK-NEXT: addis 11, 30, 2
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96 # CHECK-NEXT: lwz 11, 4(11)
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97 # CHECK-NEXT: mtctr 11
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98 # CHECK-NEXT: bctr
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99 # CHECK-EMPTY:
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100
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101 ## Another -fPIC call stub of f from another object file %t2.o
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102 ## .got2 may have different addresses in different object files,
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103 ## so the call stub cannot be shared.
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173
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104 # CHECK-NEXT: <00008000.got2.plt_pic32.f>:
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150
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105
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106 ## In Secure PLT ABI, .plt stores function pointers to first instructions of .glink
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207
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107 # HEX: 0x00040374 00010294 00010298 0001029c
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150
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108
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109 ## These instructions are referenced by .plt entries.
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173
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110 # CHECK: [[#%x,GLINK:]] <.glink>:
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111 # CHECK-NEXT: b 0x[[#%x,GLINK+12]]
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112 # CHECK-NEXT: b 0x[[#%x,GLINK+12]]
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113 # CHECK-NEXT: b 0x[[#%x,GLINK+12]]
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150
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114
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115 ## PLTresolve
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207
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116 ## Operand of addi: 0x102cc-.glink = 24
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150
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117 # CHECK-NEXT: addis 11, 11, 0
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118 # CHECK-NEXT: mflr 0
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173
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119 # CHECK-NEXT: bcl 20, 31, 0x[[#%x,NEXT:]]
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120 # CHECK-NEXT: [[#%x,NEXT]]: addi 11, 11, 24
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150
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121
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122 # CHECK-NEXT: mflr 12
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123 # CHECK-NEXT: mtlr 0
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173
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124 # CHECK-NEXT: sub 11, 11, 12
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150
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125
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207
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126 ## Operand of lwz in -pie mode: &.got[1] - 0x102bc = 0x20380+4 - 0x102bc = 65536*1+200
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150
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127 # CHECK-NEXT: addis 12, 12, 1
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207
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128 # PIE-NEXT: lwz 0, 200(12)
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150
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129 # SHARED-NEXT: lwz 0, 184(12)
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130
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207
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131 # PIE-NEXT: lwz 12, 204(12)
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150
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132 # SHARED-NEXT: lwz 12, 188(12)
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133 # CHECK-NEXT: mtctr 0
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134 # CHECK-NEXT: add 0, 11, 11
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135 # CHECK-NEXT: add 11, 0, 11
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136 # CHECK-NEXT: bctr
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137
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138 .section .got2,"aw"
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139 .space 65516
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140 .long f
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141 .long g
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142 .long h
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143
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144 .text
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145 .globl _start
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146 _start:
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147 bcl 20,31,.L
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148 .L:
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149 mflr 30
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150 addis 30, 30, .got2+0x8000-.L@ha
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151 addi 30, 30, .got2+0x8000-.L@l
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152 bl f+0x8000@plt
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153 bl f+0x8000@plt
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154 bl g+0x8000@plt
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155 bl g+0x8000@plt
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156 bl h+0x8000@plt
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157 bl h+0x8000@plt
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158
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159 ## An addend of 0 indicates r30 is stored in _GLOBAL_OFFSET_TABLE_.
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160 ## The existing thunk is incompatible, thus it cannot be reused.
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161 addis 30, 30, _GLOBAL_OFFSET_TABLE_-.L@ha
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162 addi 30, 30, _GLOBAL_OFFSET_TABLE_-.L@l
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163 bl f@plt
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