lld/test/ELF/linkerscript/linkorder-linked-to.s

   1 # REQUIRES: x86
   2 ## Test how we set the sh_link field of a SHF_LINK_ORDER output section.
   3 ## Additionally, test that in a relocatable link, SHF_LINK_ORDER sections are
   4 ## not combined. Combining them will arbitrarily choose a single output
   5 ## section, losing tracking of correct dependencies.
   6
   7 # RUN: llvm-mc -filetype=obj --triple=x86_64 %s -o %t.o
   8
   9 ## In the absence of a SECTIONS command.
  10 # RUN: ld.lld %t.o -o %t
  11 # RUN: llvm-readelf -S -x foo %t | FileCheck --check-prefixes=EXE,EXE-HEX %s
  12 # RUN: ld.lld %t.o -o %t.ro -r
  13 # RUN: llvm-readelf -S %t.ro | FileCheck --check-prefix=REL %s
  14
  15 ## A non-relocatable link places readonly sections before read-executable sections.
  16 # EXE:      [Nr] Name     {{.*}} Flg Lk
  17 # EXE-NEXT: [ 0]
  18 # EXE-NEXT: [ 1] foo      {{.*}}  AL  2
  19 # EXE-NEXT: [ 2] .text    {{.*}}  AX  0
  20
  21 ## An implementation detail: foo is moved after its linked-to section (orphan).
  22 # REL:      [Nr] Name     {{.*}} Flg Lk
  23 # REL-NEXT: [ 0]
  24 # REL-NEXT: [ 1] .text    {{.*}}  AX  0
  25 # REL-NEXT: [ 2] .text.f1 {{.*}}  AX  0
  26 # REL-NEXT: [ 3] foo      {{.*}}  AL  2
  27 # REL-NEXT: [ 4] .text.f2 {{.*}}  AX  0
  28 # REL-NEXT: [ 5] foo      {{.*}}  AL  4
  29
  30 ## A SECTIONS command combines .text.*
  31 # RUN: echo 'SECTIONS { .text : { *(.text.f1) *(.text.f2) } }' > %t1.lds
  32 # RUN: ld.lld -T %t1.lds %t.o -o %t1
  33 # RUN: llvm-readelf -S -x foo %t1 | FileCheck --check-prefixes=EXE,EXE-HEX %s
  34 # RUN: ld.lld -T %t1.lds %t.o -o %t1.ro -r
  35 # RUN: llvm-readelf -S -x foo %t1.ro | FileCheck --check-prefix=REL1 %s
  36
  37 # REL1:      [Nr] Name    {{.*}} Flg Lk
  38 # REL1-NEXT: [ 0]
  39 # REL1-NEXT: [ 1] .text   {{.*}}  AX  0
  40 # REL1-NEXT: [ 2] foo     {{.*}}  AL  1
  41
  42 ## A SECTIONS command separates .text.*
  43 # RUN: echo 'SECTIONS { .text.f1 : { *(.text.f1) } .text.f2 : { *(.text.f2) } }' > %t2.lds
  44 # RUN: ld.lld -T %t2.lds %t.o -o %t2
  45 # RUN: llvm-readelf -S -x foo %t2 | FileCheck --check-prefixes=EXE2,EXE-HEX %s
  46 # RUN: ld.lld -T %t2.lds %t.o -o %t2.ro -r
  47 # RUN: llvm-readelf -S %t2.ro | FileCheck --check-prefixes=REL2 %s
  48
  49 # EXE2:      [Nr] Name     {{.*}} Flg Lk
  50 # EXE2-NEXT: [ 0]
  51 # EXE2-NEXT: [ 1] foo      {{.*}}  AL  2
  52 # EXE2-NEXT: [ 2] .text.f1 {{.*}}  AX  0
  53 # EXE2-NEXT: [ 3] .text.f2 {{.*}}  AX  0
  54
  55 # REL2:      [Nr] Name     {{.*}} Flg Lk
  56 # REL2-NEXT: [ 0]
  57 # REL2-NEXT: [ 1] .text.f1 {{.*}}  AX  0
  58 # REL2-NEXT: [ 2] .text.f2 {{.*}}  AX  0
  59 # REL2-NEXT: [ 3] .text    {{.*}}  AX  0
  60 # REL2-NEXT: [ 4] foo      {{.*}}  AL  1
  61 # REL2-NEXT: [ 5] foo      {{.*}}  AL  2
  62
  63 # EXE-HEX:      Hex dump of section 'foo':
  64 # EXE-HEX-NEXT: 0102
  65
  66 .section .text.f1,"ax",@progbits
  67 ret
  68 .section .text.f2,"ax",@progbits
  69 ret
  70
  71 .section foo,"ao",@progbits,.text.f2
  72 .byte 2
  73 .section foo,"ao",@progbits,.text.f1
  74 .byte 1