lld/test/COFF/arm-thumb-thunks.s

   1 // REQUIRES: arm
   2 // RUN: llvm-mc -filetype=obj -triple=thumbv7-windows %s -o %t.obj
   3 // RUN: lld-link -entry:main -subsystem:console %t.obj -out:%t.exe -map -verbose 2>&1 | FileCheck -check-prefix=VERBOSE %s
   4 // RUN: llvm-objdump --no-print-imm-hex -d %t.exe --start-address=0x401000 --stop-address=0x401022 | FileCheck --check-prefix=MAIN %s
   5 // RUN: llvm-objdump --no-print-imm-hex -d %t.exe --start-address=0x501022 --stop-address=0x501032 | FileCheck --check-prefix=FUNC1 %s
   6 // RUN: llvm-objdump --no-print-imm-hex -d %t.exe --start-address=0x601032 | FileCheck --check-prefix=FUNC2 %s
   7
   8 // VERBOSE: Added 3 thunks with margin {{.*}} in 1 passes
   9
  10     .syntax unified
  11     .globl main
  12     .globl func1
  13     .text
  14 main:
  15     bne func1
  16     bne func2
  17     // This should reuse the same thunk as func1 above
  18     bne func1_alias
  19     bx lr
  20     .section .text$a, "xr"
  21     .space 0x100000
  22     .section .text$b, "xr"
  23 func1:
  24 func1_alias:
  25     // This shouldn't reuse the func2 thunk from above, since it is out
  26     // of range.
  27     bne func2
  28     bx lr
  29     .section .text$c, "xr"
  30     .space 0x100000
  31     .section .text$d, "xr"
  32 func2:
  33 // Test using string tail merging. This is irrelevant to the thunking itself,
  34 // but running multiple passes of assignAddresses() calls finalizeAddresses()
  35 // multiple times; check that MergeChunk handles this correctly.
  36     movw r0, :lower16:"??_C@string1"
  37     movt r0, :upper16:"??_C@string1"
  38     movw r1, :lower16:"??_C@string2"
  39     movt r1, :upper16:"??_C@string2"
  40     bx lr
  41
  42     .section .rdata,"dr",discard,"??_C@string1"
  43     .globl "??_C@string1"
  44 "??_C@string1":
  45     .asciz "foobar"
  46     .section .rdata,"dr",discard,"??_C@string2"
  47     .globl "??_C@string2"
  48 "??_C@string2":
  49     .asciz "bar"
  50
  51 // MAIN:    401000:       f040 8005       bne.w   0x40100e <.text+0xe>
  52 // MAIN:    401004:       f040 8008       bne.w   0x401018 <.text+0x18>
  53 // MAIN:    401008:       f040 8001       bne.w   0x40100e <.text+0xe>
  54 // MAIN:    40100c:       4770            bx      lr
  55 // func1 thunk
  56 // MAIN:    40100e:       f240 0c08       movw    r12, #8
  57 // MAIN:    401012:       f2c0 0c10       movt    r12, #16
  58 // MAIN:    401016:       44e7            add     pc,  r12
  59 // func2 thunk
  60 // MAIN:    401018:       f240 0c0e       movw    r12, #14
  61 // MAIN:    40101c:       f2c0 0c20       movt    r12, #32
  62 // MAIN:    401020:       44e7            add     pc,  r12
  63
  64 // FUNC1:   501022:       f040 8001       bne.w   0x501028 <.text+0x100028>
  65 // FUNC1:   501026:       4770            bx      lr
  66 // func2 thunk
  67 // FUNC1:   501028:       f64f 7cfe       movw    r12, #65534
  68 // FUNC1:   50102c:       f2c0 0c0f       movt    r12, #15
  69 // FUNC1:   501030:       44e7            add     pc,  r12
  70
  71 // FUNC2:   601032:       f242 0000       movw    r0, #8192
  72 // FUNC2:   601036:       f2c0 0060       movt    r0, #96
  73 // FUNC2:   60103a:       f242 0103       movw    r1, #8195
  74 // FUNC2:   60103e:       f2c0 0160       movt    r1, #96
  75 // FUNC2:   601042:       4770            bx      lr