lld/test/ELF/linkerscript/sections.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
   3
   4 # Empty SECTIONS command.
   5 # RUN: echo "SECTIONS {}" > %t.script
   6 # RUN: ld.lld -o %t1 --script %t.script %t
   7 # RUN: llvm-objdump --section-headers %t1 | \
   8 # RUN:   FileCheck -check-prefix=SEC-DEFAULT %s
   9
  10 # SECTIONS command with the same order as default.
  11 # RUN: echo "SECTIONS { \
  12 # RUN:          .text : { *(.text) } \
  13 # RUN:          .data : { *(.data) } }" > %t.script
  14 # RUN: ld.lld -o %t2 --script %t.script %t
  15 # RUN: llvm-objdump --section-headers %t2 | \
  16 # RUN:   FileCheck -check-prefix=SEC-DEFAULT %s
  17
  18 #             Idx Name          Size
  19 # SEC-DEFAULT: 1 .text         0000000e {{[0-9a-f]*}} TEXT
  20 # SEC-DEFAULT: 2 .data         00000020 {{[0-9a-f]*}} DATA
  21 # SEC-DEFAULT: 3 other         00000003 {{[0-9a-f]*}} DATA
  22 # SEC-DEFAULT: 4 .bss          00000002 {{[0-9a-f]*}} BSS
  23 # SEC-DEFAULT: 5 .comment      00000008 {{[0-9a-f]*}}
  24 # SEC-DEFAULT: 6 .symtab       00000030 {{[0-9a-f]*}}
  25 # SEC-DEFAULT: 7 .shstrtab     0000003b {{[0-9a-f]*}}
  26 # SEC-DEFAULT: 8 .strtab       00000008 {{[0-9a-f]*}}
  27
  28 # .text and .data have swapped names but proper sizes and types.
  29 # RUN: echo "SECTIONS { \
  30 # RUN:          .data : { *(.text) } \
  31 # RUN:          .text : { *(.data) } }" > %t.script
  32 # RUN: ld.lld -o %t4 --script %t.script %t
  33 # RUN: llvm-objdump --section-headers %t4 | \
  34 # RUN:   FileCheck -check-prefix=SEC-SWAP-NAMES %s
  35
  36 #                Idx Name          Size
  37 # SEC-SWAP-NAMES: 1 .data         0000000e {{[0-9a-f]*}} TEXT
  38 # SEC-SWAP-NAMES: 2 .text         00000020 {{[0-9a-f]*}} DATA
  39 # SEC-SWAP-NAMES: 3 other         00000003 {{[0-9a-f]*}} DATA
  40 # SEC-SWAP-NAMES: 4 .bss          00000002 {{[0-9a-f]*}} BSS
  41 # SEC-SWAP-NAMES: 5 .comment      00000008 {{[0-9a-f]*}}
  42 # SEC-SWAP-NAMES: 6 .symtab       00000030 {{[0-9a-f]*}}
  43 # SEC-SWAP-NAMES: 7 .shstrtab     0000003b {{[0-9a-f]*}}
  44 # SEC-SWAP-NAMES: 8 .strtab       00000008 {{[0-9a-f]*}}
  45
  46 # Multiple SECTIONS command specifying additional input section descriptions
  47 # for the same output section description - input sections are merged into
  48 # one output section.
  49 # RUN: echo "SECTIONS { \
  50 # RUN:          .text : { *(.text) } \
  51 # RUN:          .data : { *(.data) } } \
  52 # RUN:       SECTIONS { \
  53 # RUN:          .data : { *(other) } }" > %t.script
  54 # RUN: ld.lld -o %t6 --script %t.script %t
  55 # RUN: llvm-objdump --section-headers %t6 | \
  56 # RUN:   FileCheck -check-prefix=SEC-MULTI %s
  57
  58 #           Idx Name          Size
  59 # SEC-MULTI:      1 .text         0000000e {{[0-9a-f]*}} TEXT
  60 # SEC-MULTI-NEXT:   .data         00000020 {{[0-9a-f]*}} DATA
  61 # SEC-MULTI-NEXT:   .data         00000003 {{[0-9a-f]*}} DATA
  62 # SEC-MULTI-NEXT:   .bss          00000002 {{[0-9a-f]*}} BSS
  63 # SEC-MULTI-NEXT:   .comment      00000008 {{[0-9a-f]*}}
  64 # SEC-MULTI-NEXT:   .symtab       00000030 {{[0-9a-f]*}}
  65 # SEC-MULTI-NEXT:   .shstrtab     00000035 {{[0-9a-f]*}}
  66 # SEC-MULTI-NEXT:   .strtab       00000008 {{[0-9a-f]*}}
  67
  68 ## other is placed in a PT_LOAD segment even if it is preceded by a non-alloc section.
  69 ## The current implementation places .data, .bss, .comment and other in the same PT_LOAD.
  70 # RUN: echo 'SECTIONS { \
  71 # RUN:          .text : { *(.text) } \
  72 # RUN:          .data : { *(.data) } \
  73 # RUN:          .comment : { *(.comment) } \
  74 # RUN:          other : { *(other) } }' > %t5.lds
  75 # RUN: ld.lld -o %t5 -T %t5.lds %t
  76 # RUN: llvm-readelf -S -l %t5 | FileCheck --check-prefix=SEP-BY-NONALLOC %s
  77
  78 # SEP-BY-NONALLOC:      [Nr] Name      Type     Address          Off    Size   ES Flg
  79 # SEP-BY-NONALLOC:      [ 1] .text     PROGBITS 0000000000000000 001000 00000e 00  AX
  80 # SEP-BY-NONALLOC-NEXT: [ 2] .data     PROGBITS 000000000000000e 00100e 000020 00  WA
  81 # SEP-BY-NONALLOC-NEXT: [ 3] .bss      NOBITS   000000000000002e 00102e 000002 00  WA
  82 # SEP-BY-NONALLOC-NEXT: [ 4] .comment  PROGBITS 0000000000000000 001033 000008 01  MS
  83 # SEP-BY-NONALLOC:      [ 8] other     PROGBITS 0000000000000030 001030 000003 00  WA
  84
  85 # SEP-BY-NONALLOC:      Type      Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
  86 # SEP-BY-NONALLOC-NEXT: LOAD      0x001000 0x0000000000000000 0x0000000000000000 0x00000e 0x00000e R E 0x1000
  87 # SEP-BY-NONALLOC-NEXT: LOAD      0x00100e 0x000000000000000e 0x000000000000000e 0x000025 0x000025 RW  0x1000
  88 # SEP-BY-NONALLOC-NEXT: GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW  0
  89
  90 # Input section pattern contains additional semicolon.
  91 # Case found in linux kernel script. Check we are able to parse it.
  92 # RUN: echo "SECTIONS { .text : { ;;*(.text);;S = 0;; } }" > %t.script
  93 # RUN: ld.lld -o /dev/null --script %t.script %t
  94
  95 .globl _start
  96 _start:
  97     mov $60, %rax
  98     mov $42, %rdi
  99
 100 .section .data,"aw"
 101 .quad 10, 10, 20, 20
 102 .section other,"aw"
 103 .short 10
 104 .byte 20
 105 .section .bss,"",@nobits
 106 .short 0