lld/test/ELF/x86-64-section-layout.s

   1 # REQUIRES: x86
   2 ## Test the placement of .lrodata, .lbss, .ldata, and their -fdata-sections variants.
   3 ## See also section-layout.s.
   4
   5 # RUN: rm -rf %t && split-file %s %t && cd %t
   6
   7 # RUN: llvm-mc -filetype=obj -triple=x86_64 --defsym=BSS=1 a.s -o a.o
   8 # RUN: ld.lld --section-start=.note=0x200300 a.o -o a
   9 # RUN: llvm-readelf -S -l a | FileCheck %s
  10
  11 # RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o a1.o
  12 # RUN: ld.lld --section-start=.note=0x200300 a1.o -o a1
  13 # RUN: llvm-readelf -S a1 | FileCheck %s --check-prefix=CHECK1
  14
  15 # RUN: ld.lld -T b.lds -z norelro a.o -o b
  16 # RUN: llvm-readelf -S -l b | FileCheck %s --check-prefix=CHECK2
  17
  18 # CHECK:       Name       Type            Address          Off    Size   ES Flg Lk Inf Al
  19 # CHECK-NEXT:             NULL            0000000000000000 000000 000000 00      0   0  0
  20 # CHECK-NEXT:  .note      NOTE            0000000000200300 000300 000001 00   A  0   0  1
  21 # CHECK-NEXT:  .lrodata   PROGBITS        0000000000200301 000301 000002 00  Al  0   0  1
  22 # CHECK-NEXT:  .rodata    PROGBITS        0000000000200303 000303 000001 00   A  0   0  1
  23 # CHECK-NEXT:  .text      PROGBITS        0000000000201304 000304 000001 00  AX  0   0  4
  24 # CHECK-NEXT:  .tdata     PROGBITS        0000000000202305 000305 000001 00 WAT  0   0  1
  25 # CHECK-NEXT:  .tbss      NOBITS          0000000000202306 000306 000002 00 WAT  0   0  1
  26 # CHECK-NEXT:  .relro_padding NOBITS      0000000000202306 000306 000cfa 00  WA  0   0  1
  27 # CHECK-NEXT:  .data      PROGBITS        0000000000203306 000306 000001 00  WA  0   0  1
  28 # CHECK-NEXT:  .bss       NOBITS          0000000000203307 000307 001800 00  WA  0   0  1
  29 ## We spend size(.bss) % MAXPAGESIZE bytes for .bss.
  30 # CHECK-NEXT:  .ldata     PROGBITS        0000000000205b07 000b07 000002 00 WAl  0   0  1
  31 # CHECK-NEXT:  .ldata2    PROGBITS        0000000000205b09 000b09 000001 00 WAl  0   0  1
  32 # CHECK-NEXT:  .lbss      NOBITS          0000000000205b0a 000b0a 000002 00 WAl  0   0  1
  33 # CHECK-NEXT:  .comment   PROGBITS        0000000000000000 000b0a {{.*}} 01  MS  0   0  1
  34
  35 # CHECK:       Program Headers:
  36 # CHECK-NEXT:    Type  Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
  37 # CHECK-NEXT:    PHDR  0x000040 0x0000000000200040 0x0000000000200040 {{.*}}   {{.*}}   R   0x8
  38 # CHECK-NEXT:    LOAD  0x000000 0x0000000000200000 0x0000000000200000 0x000304 0x000304 R   0x1000
  39 # CHECK-NEXT:    LOAD  0x000304 0x0000000000201304 0x0000000000201304 0x000001 0x000001 R E 0x1000
  40 # CHECK-NEXT:    LOAD  0x000305 0x0000000000202305 0x0000000000202305 0x000001 0x000cfb RW  0x1000
  41 # CHECK-NEXT:    LOAD  0x000306 0x0000000000203306 0x0000000000203306 0x000001 0x001801 RW  0x1000
  42 # CHECK-NEXT:    LOAD  0x000b07 0x0000000000205b07 0x0000000000205b07 0x000003 0x000005 RW  0x1000
  43
  44 # CHECK1:      .data      PROGBITS        0000000000203306 000306 000001 00  WA  0   0  1
  45 # CHECK1-NEXT: .ldata     PROGBITS        0000000000203307 000307 000002 00 WAl  0   0  1
  46 # CHECK1-NEXT: .ldata2    PROGBITS        0000000000203309 000309 000001 00 WAl  0   0  1
  47 # CHECK1-NEXT: .comment   PROGBITS        0000000000000000 00030a {{.*}} 01  MS  0   0  1
  48
  49 # CHECK2:      .note      NOTE            0000000000200300 000300 000001 00   A  0   0  1
  50 # CHECK2-NEXT: .lrodata   PROGBITS        0000000000200301 000301 000001 00  Al  0   0  1
  51 ## With a SECTIONS command, we suppress the default rule placing .lrodata.* into .lrodata.
  52 # CHECK2-NEXT: .lrodata.1 PROGBITS        0000000000200302 000302 000001 00  Al  0   0  1
  53 # CHECK2-NEXT: .rodata    PROGBITS        0000000000200303 000303 000001 00   A  0   0  1
  54 # CHECK2-NEXT: .text      PROGBITS        0000000000200304 000304 000001 00  AX  0   0  4
  55 # CHECK2-NEXT: .tdata     PROGBITS        0000000000200305 000305 000001 00 WAT  0   0  1
  56 # CHECK2-NEXT: .tbss      NOBITS          0000000000200306 000306 000001 00 WAT  0   0  1
  57 # CHECK2-NEXT: .tbss.1    NOBITS          0000000000200307 000306 000001 00 WAT  0   0  1
  58 # CHECK2-NEXT: .data      PROGBITS        0000000000200306 000306 000001 00  WA  0   0  1
  59 # CHECK2-NEXT: .bss       NOBITS          0000000000200307 000307 001800 00  WA  0   0  1
  60 # CHECK2-NEXT: .ldata     PROGBITS        0000000000201b07 001b07 000002 00 WAl  0   0  1
  61 # CHECK2-NEXT: .ldata2    PROGBITS        0000000000201b09 001b09 000001 00 WAl  0   0  1
  62 # CHECK2-NEXT: .lbss      NOBITS          0000000000201b0a 001b0a 000002 00 WAl  0   0  1
  63 # CHECK2-NEXT: .comment   PROGBITS        0000000000000000 001b0a {{.*}} 01  MS  0   0  1
  64
  65 # CHECK2:      Program Headers:
  66 # CHECK2-NEXT:   Type  Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
  67 # CHECK2-NEXT:   PHDR  0x000040 0x0000000000200040 0x0000000000200040 {{.*}}   {{.*}}   R   0x8
  68 # CHECK2-NEXT:   LOAD  0x000000 0x0000000000200000 0x0000000000200000 0x000304 0x000304 R   0x1000
  69 # CHECK2-NEXT:   LOAD  0x000304 0x0000000000200304 0x0000000000200304 0x000001 0x000001 R E 0x1000
  70 # CHECK2-NEXT:   LOAD  0x000305 0x0000000000200305 0x0000000000200305 0x001805 0x001807 RW  0x1000
  71 # CHECK2-NEXT:   TLS   0x000305 0x0000000000200305 0x0000000000200305 0x000001 0x000003 R   0x1
  72
  73 #--- a.s
  74 .globl _start
  75 _start:
  76   ret
  77
  78 .section .note,"a",@note; .space 1
  79 .section .rodata,"a",@progbits; .space 1
  80 .section .data,"aw",@progbits; .space 1
  81 .ifdef BSS
  82 ## .bss is large than one MAXPAGESIZE to test file offsets.
  83 .section .bss,"aw",@nobits; .space 0x1800
  84 .endif
  85 .section .tdata,"awT",@progbits; .space 1
  86 .section .tbss,"awT",@nobits; .space 1
  87 .section .tbss.1,"awT",@nobits; .space 1
  88
  89 .section .lrodata,"al"; .space 1
  90 .section .lrodata.1,"al"; .space 1
  91 .section .ldata,"awl"; .space 1
  92 ## Input .ldata.rel.ro sections are placed in the output .ldata section.
  93 .section .ldata.rel.ro,"awl"; .space 1
  94 .ifdef BSS
  95 .section .lbss,"awl",@nobits; .space 1
  96 ## Input .lbss.rel.ro sections are placed in the output .lbss section.
  97 .section .lbss.rel.ro,"awl",@nobits; .space 1
  98 .endif
  99 .section .ldata2,"awl"; .space 1
 100
 101 #--- b.lds
 102 SECTIONS {
 103   . = 0x200300;
 104   .rodata : {}
 105   .text : {}
 106   .data : {}
 107   .bss : {}
 108   .ldata : { *(.ldata .ldata.*) }
 109   .ldata2 : {}
 110   .lbss : { *(.lbss .lbss.*) }
 111 }