gold/testsuite/thumb_blx_out_of_range.s

   1 # thumb_blx_out_of_range.s
   2 # Test THUMB/THUMB-2 blx instructions just out of the branch range limits.
   3         .syntax unified
   4
   5         .section        .text.pre,"x"
   6
   7 # Add padding so that target is just output of branch range.
   8         .space  6
   9
  10         .global _forward_target
  11         .global _backward_target
  12         .type   _backword_target, %function
  13 _backward_target:
  14         bx      lr
  15         .size   _backward_target, .-_backward_target
  16
  17         .text
  18
  19 # Define _start so that linker does not complain.
  20         .align  2
  21         .global _start
  22         .code   32
  23         .type   _start, %function
  24 _start:
  25         bx      lr
  26         .size   _start, .-_start
  27
  28         .global _backward_test
  29         .code   16
  30         .thumb_func
  31         .type   _backward_test, %function
  32 _backward_test:
  33         bl      _backward_target
  34         .size   _backward_test, .-_backward_test
  35
  36         .align  2
  37         .global _forward_test
  38         .code   16
  39         .thumb_func
  40         .type   _forward_test, %function
  41 _forward_test:
  42         # Bit 1 of the BLX target comes from bit 1 of branch base address,
  43         # which is BLX instruction's address + 4.  We intentionally put this
  44         # forward BLX at an address n*4 + 2 so that the branch offset is
  45         # bumped up by 2.
  46         nop.n
  47         bl      _forward_target
  48         .size   _forward_test, .-_forward_test
  49         .code   32
  50
  51         .section        .text.post,"x"
  52
  53 # Add padding so that target is just out of branch range.
  54         .space  12
  55         .align 2
  56         .code   32
  57         .global _forward_target
  58         .type   _forward_target, %function
  59 _forward_target:
  60         bx      lr
  61         .size   _forward_target, .-_forward_target