gold/testsuite/thumb_blx_in_range.s

   1 # thumb_blx_in_range.s
   2 #
   3 # Test THUMB/THUMB-2 blx instructions just within the branch range limits.
   4 # Because bit 1 of the branch target comes from the branch instruction
   5 # address, the branch range from PC (branch instruction address + 4) is
   6 # acutally -((1<<22) + 2) to ((1<<22) - 4) for THUMB and -((1<<24) + 2) to
   7 # ((1<<24) - 4) from THUMB2.
   8
   9         .syntax unified
  10         .section        .text.pre,"x"
  11
  12 # Add padding so that target is just in branch range.
  13         .space  8
  14
  15         .align  2
  16         .global _backward_target
  17         .code   32
  18         .type   _backword_target, %function
  19 _backward_target:
  20         bx      lr
  21         .size   _backward_target, .-_backward_target
  22
  23         .text
  24
  25 # Define _start so that linker does not complain.
  26         .global _start
  27         .code   32
  28         .align  2
  29         .type   _start, %function
  30 _start:
  31         bx      lr
  32         .size   _start, .-_start
  33
  34         .global _backward_test
  35         .code   16
  36         .thumb_func
  37         .type   _backward_test, %function
  38 _backward_test:
  39         nop.n
  40         blx     _backward_target
  41         .size   _backward_test, .-_backward_test
  42
  43         .align  2
  44         .global _forward_test
  45         .code   16
  46         .thumb_func
  47         .type   _forward_test, %function
  48 _forward_test:
  49         blx     _forward_target
  50         .size   _forward_test, .-_forward_test
  51         .code   32
  52
  53         .section        .text.post,"x"
  54
  55 # Add padding so that target is just in branch range.
  56         .space  12
  57
  58         .align  2
  59         .global _forward_target
  60         .code   32
  61         .type   _forward_target, %function
  62 _forward_target:
  63         bx      lr
  64         .size   _forward_target, .-_forward_target