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150
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1 // REQUIRES: arm
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2 // RUN: llvm-mc -filetype=obj --arm-add-build-attributes -triple=armv7a-none-linux-gnueabi %s -o %t
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3 // RUN: ld.lld %t -o %t2
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173
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4 // RUN: llvm-objdump -d --triple=armv7a-none-linux-gnueabi --no-show-raw-insn %t2 | FileCheck %s
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5 // RUN: llvm-objdump -s --triple=armv7a-none-linux-gnueabi %t2 | FileCheck --check-prefix=CHECK-EXIDX %s
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150
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6 // RUN: llvm-readobj --program-headers --sections %t2 | FileCheck -check-prefix=CHECK-PT %s
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7
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8 // Test that inline unwinding table entries and references to .ARM.extab
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9 // entries survive the re-ordering of the .ARM.exidx section
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10
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11 .syntax unified
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12 // Will produce an ARM.exidx entry with inline unwinding instructions
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13 .section .text.func1, "ax",%progbits
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14 .global func1
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15 func1:
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16 .fnstart
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17 bx lr
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18 .save {r7, lr}
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19 .setfp r7, sp, #0
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20 .fnend
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21
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22 // Unwinding instructions for .text2 too large for an inline entry ARM.exidx
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23 // entry. A separate .ARM.extab section is created to hold the unwind entries
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24 // The .ARM.exidx table entry has a reference to the .ARM.extab section.
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25 .section .text.func2, "ax",%progbits
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26 .global func2
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27 func2:
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28 .fnstart
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29 bx lr
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30 .personality __gxx_personality_v0
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31 .handlerdata
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32 .long 0
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33 .section .text.func2
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34 .fnend
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35
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36 // Dummy implementation of personality routines to satisfy reference from
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37 // exception tables
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38 .section .text.__gcc_personality_v0, "ax", %progbits
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39 .global __gxx_personality_v0
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40 __gxx_personality_v0:
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41 bx lr
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42
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43 .section .text.__aeabi_unwind_cpp_pr0, "ax", %progbits
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44 .global __aeabi_unwind_cpp_pr0
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45 __aeabi_unwind_cpp_pr0:
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46 bx lr
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47
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48 .text
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49 .global _start
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50 _start:
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51 bl func1
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52 bl func2
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53 bx lr
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54
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55 // CHECK: Disassembly of section .text:
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56 // CHECK-EMPTY:
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173
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57 // CHECK-NEXT: <_start>:
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58 // CHECK-NEXT: 20108: bl #4 <func1>
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150
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59 // CHECK-NEXT: bl #4 <func2>
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60 // CHECK-NEXT: bx lr
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173
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61 // CHECK: <func1>:
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62 // CHECK-NEXT: 20114: bx lr
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63 // CHECK: <func2>:
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64 // CHECK-NEXT: 20118: bx lr
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65 // CHECK: <__gxx_personality_v0>:
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66 // CHECK-NEXT: 2011c: bx lr
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67 // CHECK: <__aeabi_unwind_cpp_pr0>:
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68 // CHECK-NEXT: 20120: bx lr
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150
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69
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173
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70 /// 100d4 + 0x10034 = 0x20108 = main (linker generated cantunwind)
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71 /// 100dc + 0x10038 = 0x20114 = func1 (inline unwinding data)
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72 // CHECK-EXIDX: 100d4 34000100 01000000 38000100 08849780
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73 /// 100e4 + 0x10034 = 0x20118 = func2 (100e8 + 14 = 100fc = .ARM.extab entry)
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74 /// 100ec + 0x10030 = 0x2011c = __gxx_personality_v0 (linker generated cantunwind)
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75 // CHECK-EXIDX-NEXT: 100e4 34000100 14000000 30000100 01000000
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76 /// 100f4 + 0x10030 = 1101c = sentinel
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77 // CHECK-EXIDX-NEXT: 100f4 30000100 01000000
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150
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78
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79 // CHECK-PT: Name: .ARM.exidx
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80 // CHECK-PT-NEXT: Type: SHT_ARM_EXIDX (0x70000001)
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81 // CHECK-PT-NEXT: Flags [
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82 // CHECK-PT-NEXT: SHF_ALLOC
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83 // CHECK-PT-NEXT: SHF_LINK_ORDER
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84 // CHECK-PT-NEXT: ]
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85 // CHECK-PT-NEXT: Address: 0x100D4
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86 // CHECK-PT-NEXT: Offset: 0xD4
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87 // CHECK-PT-NEXT: Size: 40
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88
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89 // CHECK-PT: Type: PT_ARM_EXIDX (0x70000001)
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90 // CHECK-PT-NEXT: Offset: 0xD4
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91 // CHECK-PT-NEXT: VirtualAddress: 0x100D4
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92 // CHECK-PT-NEXT: PhysicalAddress: 0x100D4
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93 // CHECK-PT-NEXT: FileSize: 40
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94 // CHECK-PT-NEXT: MemSize: 40
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95 // CHECK-PT-NEXT: Flags [ (0x4)
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96 // CHECK-PT-NEXT: PF_R (0x4)
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97 // CHECK-PT-NEXT: ]
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98 // CHECK-PT-NEXT: Alignment: 4
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99 // CHECK-PT-NEXT: }
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