lld/test/ELF/arm-exidx-range.s

   1 // REQUIRES: arm, shell
   2 // RUN: llvm-mc --arm-add-build-attributes --triple=armv7a-linux-gnueabihf -filetype=obj %s -o %t.o
   3 // RUN: echo "SECTIONS { \
   4 // RUN:         . = 0x80000000; \
   5 // RUN:         .text : { *(.text) } \
   6 // RUN:         .vectors 0xffff0000 : AT(0xffff0000) { *(.vectors) } \
   7 // RUN: } " > %t.script
   8 // RUN: ld.lld --script %t.script %t.o -o %t
   9 // RUN: llvm-readobj -x .ARM.exidx %t | FileCheck %s
  10 /// Adapted from Linux kernel linker script failing due to out of range
  11 /// relocation. The .vectors at 0xffff0000 is a common occurrence as the vector
  12 /// table can only be placed at either 0 or 0xffff0000 in older ARM CPUs.
  13 /// In the example the .vectors won't have an exception table so if LLD creates
  14 /// one then we'll get a relocation out of range error. Check that we don't
  15 /// synthesise a table entry or place a sentinel out of range.
  16
  17 /// Expect only .ARM.exidx from _start and sentinel
  18 // CHECK: Hex dump of section '.ARM.exidx':
  19 // CHECK-NEXT: 0x80000000 10000000 01000000 0c000000 01000000
  20 // CHECK-NOT:  0x80000010
  21
  22  .text
  23  .global _start
  24  .type _start, %function
  25 _start:
  26  .fnstart
  27  bx lr
  28  .cantunwind
  29  .fnend
  30
  31  .section .vectors, "ax", %progbits
  32  .global vecs
  33  .type vecs, %function
  34 vecs:
  35  bx lr