lld/test/ELF/arm-thunk-arm-thumb-reuse.s

   1 // REQUIRES: arm
   2 // RUN: split-file %s %t
   3 // RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv7a-none-linux-gnueabi %t/test.s -o %t.o
   4 // RUN: ld.lld --script %t/script %t.o -o %t2
   5 // RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn -d %t2 | FileCheck %s
   6
   7 // RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv7aeb-none-linux-gnueabi -mcpu=cortex-a8 %t/test.s -o %t.o
   8 // RUN: ld.lld --script %t/script %t.o -o %t2
   9 // RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn -d %t2 | FileCheck %s
  10 // RUN: ld.lld --be8 --script %t/script %t.o -o %t2
  11 // RUN: llvm-objdump --no-print-imm-hex --no-show-raw-insn -d %t2 | FileCheck %s
  12
  13 /// Test that we can reuse thunks between Arm and Thumb callers
  14 /// using a BL. Expect two thunks, one for far, one for far2.
  15
  16 //--- script
  17 SECTIONS {
  18         .text 0x10000 : { *(.text) }
  19         .text.far 0x10000000 : AT (0x10000000) { *(.far) }
  20 }
  21
  22 //--- test.s
  23
  24 .syntax unified
  25 .text
  26 .globl _start
  27 .type _start, %function
  28  .arm
  29 _start:
  30  bl far
  31  .thumb
  32  bl far
  33  bl far2
  34  .arm
  35  bl far2
  36
  37 // CHECK:   00010000 <_start>:
  38 // CHECK-NEXT: 10000: bl      0x10010 <__ARMv7ABSLongThunk_far>
  39 // CHECK-NEXT: 10004: blx     0x10010 <__ARMv7ABSLongThunk_far>
  40 // CHECK-NEXT: 10008: bl      0x1001c <__Thumbv7ABSLongThunk_far2>
  41 // CHECK-NEXT: 1000c: blx     0x1001c <__Thumbv7ABSLongThunk_far2>
  42 // CHECK:   00010010 <__ARMv7ABSLongThunk_far>:
  43 // CHECK-NEXT: 10010: movw    r12, #0
  44 // CHECK-NEXT: 10014: movt    r12, #4096
  45 // CHECK-NEXT: 10018: bx      r12
  46 // CHECK:   0001001c <__Thumbv7ABSLongThunk_far2>:
  47 // CHECK-NEXT: 1001c: movw    r12, #4
  48 // CHECK-NEXT: 10020: movt    r12, #4096
  49 // CHECK-NEXT: 10024: bx      r12
  50
  51 .section .text.far, "ax", %progbits
  52 .globl far
  53 .type far, %function
  54 far:
  55  bx lr
  56 .globl far2
  57 .type far2, %function
  58 far2:
  59  bx lr
  60
  61 // CHECK: Disassembly of section .text.far:
  62 // CHECK:      10000000 <far>:
  63 // CHECK-NEXT: 10000000: bx      lr
  64 // CHECK:      10000004 <far2>:
  65 // CHECK-NEXT: 10000004: bx      lr