2018-07-23 19:29:46 +08:00
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# REQUIRES: x86
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# Test handling of FDE pc negative relative addressing with DW_EH_PE_sdata4.
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# This situation can arise when .eh_frame is placed after .text.
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# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
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# RUN: echo "SECTIONS { .text : { *(.text) } .eh_frame : { *(.eh_frame) } }" > %t.script
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# RUN: ld.lld --eh-frame-hdr --script %t.script --section-start .text=0x1000 %t.o -o %t
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2019-05-01 13:49:01 +08:00
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# RUN: llvm-readobj -S --section-data %t | FileCheck %s
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2018-07-23 19:29:46 +08:00
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# CHECK: Section {
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# CHECK: Index:
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# CHECK: Name: .eh_frame
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# CHECK-NEXT: Type: SHT_PROGBITS
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# CHECK-NEXT: Flags [
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# CHECK-NEXT: SHF_ALLOC
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# CHECK-NEXT: ]
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# CHECK-NEXT: Address: 0x1001
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# CHECK-NEXT: Offset: 0x1001
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# CHECK-NEXT: Size:
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# CHECK-NEXT: Link:
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# CHECK-NEXT: Info:
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# CHECK-NEXT: AddressAlignment:
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# CHECK-NEXT: EntrySize:
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# CHECK-NEXT: SectionData (
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# CHECK-NEXT: 0000: 14000000 00000000 017A5200 01010101
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# CHECK-NEXT: 0010: 1B000000 00000000 0C000000 1C000000
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# CHECK-NEXT: 0020: DFFFFFFF
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# ^
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# DFFFFFFF = _start(0x1000) - PC(.eh_frame(0x1001) + 0x20)
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# CHECK: Section {
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# CHECK: Index:
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# CHECK: Name: .eh_frame_hdr
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# CHECK-NEXT: Type: SHT_PROGBITS
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# CHECK-NEXT: Flags [
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# CHECK-NEXT: SHF_ALLOC
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# CHECK-NEXT: ]
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# CHECK-NEXT: Address: 0x1030
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# CHECK-NEXT: Offset: 0x1030
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# CHECK-NEXT: Size: 20
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# CHECK-NEXT: Link: 0
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# CHECK-NEXT: Info: 0
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# CHECK-NEXT: AddressAlignment: 4
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# CHECK-NEXT: EntrySize: 0
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# CHECK-NEXT: SectionData (
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# CHECK-NEXT: 0000: 011B033B CDFFFFFF 01000000 D0FFFFFF
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# CHECK-NEXT: 0010: E9FFFFFF
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# Header (always 4 bytes): 011B033B
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# CDFFFFFF = .eh_frame(0x1001) - .eh_frame_hdr(0x1030) - 4
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# 01000000 = 1 = the number of FDE pointers in the table.
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# D0FFFFFF = _start(0x1000) - .eh_frame_hdr(0x1030)
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# E9FFFFFF = FDE(.eh_frame(0x1001) + 0x18) - .eh_frame_hdr(0x1030)
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.text
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.global _start
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_start:
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nop
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.section .eh_frame, "a"
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.long 16 # Size
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.long 0x00 # ID
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.byte 0x01 # Version.
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.byte 0x7A # Augmentation string: "zR"
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.byte 0x52
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.byte 0x00
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.byte 0x01
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.byte 0x01 # LEB128
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.byte 0x01 # LEB128
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.byte 0x01 # LEB128
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.byte 0x1B # DW_EH_PE_pcrel | DW_EH_PE_sdata4
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.byte 0x00
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.byte 0x00
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.byte 0x00
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.long 12 # Size
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.long 24 # ID
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fde:
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.long _start - fde
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.long 0
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