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150
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1 # REQUIRES: x86
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2
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3 # Test handling of FDE pc negative relative addressing with DW_EH_PE_sdata8.
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4 # This situation can arise when .eh_frame is placed after .text.
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5
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6 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
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7 # RUN: echo "SECTIONS { .text : { *(.text) } .eh_frame : { *(.eh_frame) } }" > %t.script
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8 # RUN: ld.lld --eh-frame-hdr --script %t.script --section-start .text=0x1000 %t.o -o %t
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9 # RUN: llvm-readobj -S --section-data %t | FileCheck %s
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10
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11 # CHECK: Section {
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12 # CHECK: Index:
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13 # CHECK: Name: .eh_frame
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14 # CHECK-NEXT: Type: SHT_PROGBITS
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15 # CHECK-NEXT: Flags [
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16 # CHECK-NEXT: SHF_ALLOC
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17 # CHECK-NEXT: ]
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18 # CHECK-NEXT: Address: 0x1001
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19 # CHECK-NEXT: Offset: 0x1001
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20 # CHECK-NEXT: Size:
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21 # CHECK-NEXT: Link:
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22 # CHECK-NEXT: Info:
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23 # CHECK-NEXT: AddressAlignment:
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24 # CHECK-NEXT: EntrySize:
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25 # CHECK-NEXT: SectionData (
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236
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26 # CHECK-NEXT: 0000: 10000000 00000000 017A5200 01010101
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27 # CHECK-NEXT: 0010: 1C000000 10000000 18000000 E3FFFFFF
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28 # CHECK-NEXT: 0020: FFFFFFFF 00000000 00000000
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29 # ^
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30 # E3FFFFFF FFFFFFFF = _start(0x1000) - PC(.eh_frame(0x1001) + 0x1C)
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150
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31
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32 # CHECK: Section {
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33 # CHECK: Index:
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34 # CHECK: Name: .eh_frame_hdr
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35 # CHECK-NEXT: Type: SHT_PROGBITS
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36 # CHECK-NEXT: Flags [
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37 # CHECK-NEXT: SHF_ALLOC
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38 # CHECK-NEXT: ]
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236
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39 # CHECK-NEXT: Address: 0x1030
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40 # CHECK-NEXT: Offset: 0x1030
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150
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41 # CHECK-NEXT: Size: 20
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42 # CHECK-NEXT: Link: 0
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43 # CHECK-NEXT: Info: 0
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44 # CHECK-NEXT: AddressAlignment: 4
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45 # CHECK-NEXT: EntrySize: 0
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46 # CHECK-NEXT: SectionData (
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236
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47 # CHECK-NEXT: 0000: 011B033B CDFFFFFF 01000000 D0FFFFFF
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48 # CHECK-NEXT: 0010: E5FFFFFF
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150
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49 # Header (always 4 bytes): 011B033B
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236
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50 # CDFFFFFF = .eh_frame(0x1001) - .eh_frame_hdr(0x1030) - 4
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150
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51 # 01000000 = 1 = the number of FDE pointers in the table.
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236
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52 # D0FFFFFF = _start(0x1000) - .eh_frame_hdr(0x1030)
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53 # E5FFFFFF = FDE(.eh_frame(0x1001) + 0x18) - .eh_frame_hdr(0x1030)
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150
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54
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55 .text
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56 .global _start
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57 _start:
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58 nop
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59
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173
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60 .section .eh_frame,"a",@unwind
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150
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61 .long 16 # Size
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62 .long 0x00 # ID
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63 .byte 0x01 # Version.
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64
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65 .byte 0x7A # Augmentation string: "zR"
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66 .byte 0x52
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67 .byte 0x00
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68
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69 .byte 0x01
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70
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71 .byte 0x01 # LEB128
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72 .byte 0x01 # LEB128
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73
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74 .byte 0x01 # LEB128
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75 .byte 0x1C # DW_EH_PE_pcrel | DW_EH_PE_sdata8
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76
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77 .byte 0x00
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78 .byte 0x00
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79 .byte 0x00
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80
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81 .long 16 # Size
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82 .long 24 # ID
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83 fde:
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84 .quad _start - fde
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85 .long 0
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