test/old-elf/gnulinkonce/gnulinkonce.test

# Tests that the linker is able to read .gnu.linkonce sections and link them
# appropriately. The testcase has been created by using the following source
# code
# linkonce1a.s
# ------------
#        .section .gnu.linkonce.d.dummy,"aw"
#bar:
#        .long    0
# linkonce1b.s
# ------------
#    .globl main
#    .globl start
#    .globl _start
#    .globl __start
#    .text
#main:
#start:
#_start:
#__start:
#    .long    0
#
#        .section .gnu.linkonce.d.dummy,"aw"
#foo:
#        .long    0
#RUN: yaml2obj -format=elf -docnum 1 %s -o %t.linkonce1a.o
#RUN: yaml2obj -format=elf -docnum 2 %s -o %t.linkonce1b.o
#RUN: lld -flavor old-gnu -target x86_64 %t.linkonce1a.o %t.linkonce1b.o \
#RUN: --noinhibit-exec --output-filetype=yaml -o %t2.out.yaml
#RUN: lld -flavor old-gnu -target x86_64 %t.linkonce1a.o %t.linkonce1b.o \
#RUN: --noinhibit-exec -o %t2.out
#RUN: FileCheck %s -check-prefix=CHECKGNULINKONCE < %t2.out.yaml
#RUN: llvm-readobj -sections %t2.out | FileCheck %s -check-prefix=CHECKGNULINKONCESECTIONS
#CHECKGNULINKONCE: - name:            .gnu.linkonce.d.dummy
#CHECKGNULINKONCE:   scope:           global
#CHECKGNULINKONCE:   type:            gnu-linkonce
#CHECKGNULINKONCE:   section-choice:  custom-required
#CHECKGNULINKONCE:   section-name:    .gnu.linkonce.d.dummy
#CHECKGNULINKONCE:   permissions:     rw-
#CHECKGNULINKONCE:   references:
#CHECKGNULINKONCE:     - kind:            group-child
#CHECKGNULINKONCE:       offset:          0
#CHECKGNULINKONCE:       target:          bar
#CHECKGNULINKONCE:     - kind:            group-child
#CHECKGNULINKONCE:       offset:          0
#CHECKGNULINKONCESECTIONS:   Section {
#CHECKGNULINKONCESECTIONS:     Name: .gnu.linkonce.d.dummy
#CHECKGNULINKONCESECTIONS:     Type: SHT_PROGBITS
#CHECKGNULINKONCESECTIONS:     Flags [ (0x3)
#CHECKGNULINKONCESECTIONS:       SHF_ALLOC (0x2)
#CHECKGNULINKONCESECTIONS:       SHF_WRITE (0x1)
#CHECKGNULINKONCESECTIONS:     ]
#CHECKGNULINKONCESECTIONS:     Size: 4
#CHECKGNULINKONCESECTIONS:   }
---
FileHeader:
  Class:           ELFCLASS64
  Data:            ELFDATA2LSB
  OSABI:           ELFOSABI_GNU
  Type:            ET_REL
  Machine:         EM_X86_64
Sections:
  - Name:            .text
    Type:            SHT_PROGBITS
    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
    AddressAlign:    0x0000000000000004
    Content:         ''
  - Name:            .data
    Type:            SHT_PROGBITS
    Flags:           [ SHF_WRITE, SHF_ALLOC ]
    AddressAlign:    0x0000000000000004
    Content:         ''
  - Name:            .bss
    Type:            SHT_NOBITS
    Flags:           [ SHF_WRITE, SHF_ALLOC ]
    AddressAlign:    0x0000000000000004
  - Name:            .gnu.linkonce.d.dummy
    Type:            SHT_PROGBITS
    Flags:           [ SHF_WRITE, SHF_ALLOC ]
    AddressAlign:    0x0000000000000001
    Content:         '00000000'
Symbols:
  Local:
    - Name:            bar
      Section:         .gnu.linkonce.d.dummy
    - Name:            .text
      Type:            STT_SECTION
      Section:         .text
    - Name:            .data
      Type:            STT_SECTION
      Section:         .data
    - Name:            .bss
      Type:            STT_SECTION
      Section:         .bss
    - Name:            .gnu.linkonce.d.dummy
      Type:            STT_SECTION
      Section:         .gnu.linkonce.d.dummy
...
---
FileHeader:
  Class:           ELFCLASS64
  Data:            ELFDATA2LSB
  Type:            ET_REL
  Machine:         EM_X86_64
Sections:
  - Name:            .text
    Type:            SHT_PROGBITS
    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
    AddressAlign:    0x0000000000000004
    Content:         '00000000'
  - Name:            .data
    Type:            SHT_PROGBITS
    Flags:           [ SHF_WRITE, SHF_ALLOC ]
    AddressAlign:    0x0000000000000004
    Content:         ''
  - Name:            .bss
    Type:            SHT_NOBITS
    Flags:           [ SHF_WRITE, SHF_ALLOC ]
    AddressAlign:    0x0000000000000004
  - Name:            .gnu.linkonce.d.dummy
    Type:            SHT_PROGBITS
    Flags:           [ SHF_WRITE, SHF_ALLOC ]
    AddressAlign:    0x0000000000000001
    Content:         '00000000'
Symbols:
  Local:
    - Name:            .text
      Type:            STT_SECTION
      Section:         .text
    - Name:            .data
      Type:            STT_SECTION
      Section:         .data
    - Name:            .bss
      Type:            STT_SECTION
      Section:         .bss
    - Name:            .gnu.linkonce.d.dummy
      Type:            STT_SECTION
      Section:         .gnu.linkonce.d.dummy
    - Name:            foo
      Section:         .gnu.linkonce.d.dummy
  Global:
    - Name:            main
      Section:         .text
    - Name:            start
      Section:         .text
    - Name:            _start
      Section:         .text
    - Name:            __start
      Section:         .text
...