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