lld/test/ELF/arm-exidx-partial-discard-exidx.s

   1 // REQUIRES: arm
   2 // RUN: llvm-mc --arm-add-build-attributes --triple=armv7a-linux-gnueabihf -filetype=obj %s -o %t.o
   3 // RUN: echo "SECTIONS { \
   4 // RUN:         /DISCARD/ : { *(.ARM.exidx.exit.text) *(.ARM.extab.exit.text)} \
   5 // RUN:         . = 0x90000000; \
   6 // RUN:         .ARM.exidx : { *(.ARM.exidx) } \
   7 // RUN:         .text : { *(.text) } \
   8 // RUN:         .exit.text : { *(.exit.text) } \
   9 // RUN:         .rodata : { *(.rodata) } \
  10 // RUN: } " > %t.script
  11 // RUN: ld.lld --script %t.script %t.o -o %t
  12 // RUN: llvm-readelf -x .ARM.exidx %t | FileCheck %s
  13
  14 /// The linker script /DISCARDS/ the .ARM.exidx and .ARM.extab for the
  15 /// .exit.text . If we do not discard both sections we will end up with
  16 /// a dangling reference. We expect no linker error for an out of range
  17 /// relocation/dangling reference and just a single .ARM.exidx entry
  18 /// for _start and an entry for the terminating sentinel.
  19
  20 // CHECK: Hex dump of section '.ARM.exidx':
  21 // CHECK-NEXT: 0x90000000 10000000 01000000 10000000 01000000
  22 // CHECK-NOT:  0x90000010
  23  .text
  24  .global _start
  25  .type _start, %function
  26 _start:
  27  .fnstart
  28  bx lr
  29  .cantunwind
  30  .fnend
  31
  32  .section .exit.text, "ax", %progbits
  33  .global exit_text
  34  .type exit_text, %function
  35 exit_text:
  36   .fnstart
  37   bx lr
  38  .personality __gxx_personality_v0
  39  .handlerdata
  40  .long 0
  41  .fnend
  42
  43 /// Dummy definition for a reference from the personality routine created by
  44 /// the assembler, use .data to avoid generating a cantunwind table.
  45  .section .rodata
  46  .global __aeabi_unwind_cpp_pr0
  47 __aeabi_unwind_cpp_pr0:
  48  .word 0