lld/test/ELF/ppc64-long-branch.s

   1 # REQUIRES: ppc
   2 # RUN: echo 'SECTIONS { \
   3 # RUN:       .text_low 0x2000: { *(.text_low) } \
   4 # RUN:       .text_high 0x2002000 : { *(.text_high) } \
   5 # RUN:       }' > %t.script
   6
   7 # RUN: llvm-mc -filetype=obj -triple=ppc64le %s -o %t.o
   8 # RUN: ld.lld -T %t.script %t.o -o %t
   9 # RUN: llvm-readelf -S -r %t | FileCheck --check-prefix=SEC %s
  10 # RUN: llvm-readelf -x .branch_lt %t | FileCheck --check-prefix=BRANCH-LE %s
  11 # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
  12 # RUN: llvm-nm --no-sort %t | FileCheck --check-prefix=NM %s
  13
  14 # RUN: llvm-mc -filetype=obj -triple=ppc64 %s -o %t.o
  15 # RUN: ld.lld -T %t.script %t.o -o %t
  16 # RUN: llvm-readelf -S -r %t | FileCheck --check-prefix=SEC %s
  17 # RUN: llvm-readelf -x .branch_lt %t | FileCheck --check-prefix=BRANCH-BE %s
  18 # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
  19 # RUN: llvm-nm --no-sort %t | FileCheck --check-prefix=NM %s
  20
  21 # SEC: Name       Type     Address          Off     Size   ES Flg Lk Inf Al
  22 # SEC: .got       PROGBITS 0000000002002040 2002040 000008 00  WA  0   0  8
  23 # SEC: .branch_lt PROGBITS 0000000002002048 2002048 000018 00  WA  0   0  8
  24
  25 # SEC: There are no relocations in this file.
  26
  27 ## high@localentry (high+8), .text_high+16 and .text_low+8
  28 # BRANCH-LE:      0x02002048 08200002 00000000 10200002 00000000
  29 # BRANCH-LE-NEXT: 0x02002058 08200000 00000000
  30 # BRANCH-BE:      0x02002048 00000000 02002008 00000000 02002010
  31 # BRANCH-BE-NEXT: 0x02002058 00000000 00002008
  32
  33 # CHECK:      <_start>:
  34 # CHECK-NEXT:     2000:       bl 0x2020
  35 # CHECK-NEXT:                 bl 0x2020
  36 # CHECK-NEXT:                 bl 0x2020
  37 # CHECK-NEXT:                 bl 0x2002008
  38
  39 ## &.branch_lt[0] - .TOC. = .branch_lt - (.got+0x8000) = -32760
  40 # CHECK:      <__long_branch_high>:
  41 # CHECK-NEXT:     2020:       addis 12, 2, 0
  42 # CHECK-NEXT:                 ld 12, -32760(12)
  43 # CHECK-NEXT:                 mtctr 12
  44 # CHECK-NEXT:                 bctr
  45
  46 ## &.branch_lt[1] - .TOC. = .branch_lt - (.got+0x8000) = -32752
  47 # CHECK:      <__long_branch_>:
  48 # CHECK-NEXT:     2040:       addis 12, 2, 0
  49 # CHECK-NEXT:                 ld 12, -32752(12)
  50 # CHECK-NEXT:                 mtctr 12
  51 # CHECK-NEXT:                 bctr
  52
  53 .section .text_low, "ax", %progbits
  54 .globl _start
  55 _start:
  56 bl high          # Need a thunk
  57 bl high          # Need a thunk
  58 bl high          # Need a thunk
  59 bl high
  60 bl .text_high+16 # Need a thunk
  61 blr
  62
  63 # CHECK:      Disassembly of section .text_high:
  64 # CHECK-EMPTY:
  65 # CHECK-NEXT: <high>:
  66 # CHECK-NEXT:  2002000:       addis 2, 12, 1
  67 # CHECK-NEXT:                 addi 2, 2, -32704
  68 # CHECK-NEXT:                 bl 0x2008
  69 # CHECK-NEXT:                 bl 0x2002020
  70 # CHECK:      <__long_branch_>:
  71 # CHECK-NEXT:  2002020:       addis 12, 2, 0
  72 # CHECK-NEXT:                 ld 12, -32744(12)
  73 # CHECK-NEXT:                 mtctr 12
  74 # CHECK-NEXT:                 bctr
  75
  76 .section .text_high, "ax", %progbits
  77 .globl high
  78 high:
  79 addis 2, 12, .TOC.-high@ha
  80 addi 2, 2, .TOC.-high@l
  81 .localentry high, 8
  82 bl .text_low+8
  83 bl .text_low+8 # Need a thunk
  84 blr
  85
  86 # NM:      d .TOC.
  87 # NM-NEXT: t __long_branch_high
  88 # NM-NEXT: t __long_branch_{{$}}
  89 # NM-NEXT: t __long_branch_{{$}}
  90 # NM-NEXT: T _start
  91 # NM-NEXT: T high