1# REQUIRES: x86
2
3# Test handling of FDE pc negative relative addressing with DW_EH_PE_sdata4.
4# This situation can arise when .eh_frame is placed after .text.
5
6# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
7# RUN: echo "SECTIONS { .text : { *(.text) } .eh_frame : { *(.eh_frame) } }" > %t.script
8# RUN: ld.lld --eh-frame-hdr --script %t.script --section-start .text=0x1000 %t.o -o %t
9# RUN: llvm-readobj -S --section-data %t | FileCheck %s
10
11# CHECK:      Section {
12# CHECK:        Index:
13# CHECK:        Name: .eh_frame
14# CHECK-NEXT:   Type: SHT_PROGBITS
15# CHECK-NEXT:   Flags [
16# CHECK-NEXT:     SHF_ALLOC
17# CHECK-NEXT:   ]
18# CHECK-NEXT:   Address: 0x1001
19# CHECK-NEXT:   Offset: 0x1001
20# CHECK-NEXT:   Size:
21# CHECK-NEXT:   Link:
22# CHECK-NEXT:   Info:
23# CHECK-NEXT:   AddressAlignment:
24# CHECK-NEXT:   EntrySize:
25# CHECK-NEXT:   SectionData (
26# CHECK-NEXT:     0000: 14000000 00000000 017A5200 01010101
27# CHECK-NEXT:     0010: 1B000000 00000000 0C000000 1C000000
28# CHECK-NEXT:     0020: DFFFFFFF
29#                       ^
30#   DFFFFFFF = _start(0x1000) - PC(.eh_frame(0x1001) + 0x20)
31
32# CHECK:      Section {
33# CHECK:        Index:
34# CHECK:        Name: .eh_frame_hdr
35# CHECK-NEXT:   Type: SHT_PROGBITS
36# CHECK-NEXT:   Flags [
37# CHECK-NEXT:     SHF_ALLOC
38# CHECK-NEXT:   ]
39# CHECK-NEXT:   Address: 0x1030
40# CHECK-NEXT:   Offset: 0x1030
41# CHECK-NEXT:   Size: 20
42# CHECK-NEXT:   Link: 0
43# CHECK-NEXT:   Info: 0
44# CHECK-NEXT:   AddressAlignment: 4
45# CHECK-NEXT:   EntrySize: 0
46# CHECK-NEXT:   SectionData (
47# CHECK-NEXT:     0000: 011B033B CDFFFFFF 01000000 D0FFFFFF
48# CHECK-NEXT:     0010: E9FFFFFF
49#   Header (always 4 bytes): 011B033B
50#   CDFFFFFF = .eh_frame(0x1001) - .eh_frame_hdr(0x1030) - 4
51#   01000000 = 1 = the number of FDE pointers in the table.
52#   D0FFFFFF = _start(0x1000) - .eh_frame_hdr(0x1030)
53#   E9FFFFFF = FDE(.eh_frame(0x1001) + 0x18) - .eh_frame_hdr(0x1030)
54
55.text
56.global _start
57_start:
58 nop
59
60.section .eh_frame,"a",@unwind
61  .long 16   # Size
62  .long 0x00 # ID
63  .byte 0x01 # Version.
64
65  .byte 0x7A # Augmentation string: "zR"
66  .byte 0x52
67  .byte 0x00
68
69  .byte 0x01
70
71  .byte 0x01 # LEB128
72  .byte 0x01 # LEB128
73
74  .byte 0x01 # LEB128
75  .byte 0x1B # DW_EH_PE_pcrel | DW_EH_PE_sdata4
76
77  .byte 0x00
78  .byte 0x00
79  .byte 0x00
80
81  .long 12   # Size
82  .long 24   # ID
83fde:
84  .long _start - fde
85  .long 0
86