lld/test/COFF/arm-thumb-thunks-multipass.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 -verbose 2>&1 | FileCheck -check-prefix=VERBOSE %s
   4 // RUN: llvm-objdump -d %t.exe --start-address=0x403000 --stop-address=0x403008 | FileCheck --check-prefix=FUNC01 %s
   5 // RUN: llvm-objdump -d %t.exe --start-address=0x404ffa --stop-address=0x405012 | FileCheck --check-prefix=FUNC01-THUNKS %s
   6
   7 // VERBOSE: Added {{.*}} thunks with margin 204800 in 2 passes
   8
   9     .syntax unified
  10     .globl main
  11     .text
  12 main:
  13     b  func01
  14     bx lr
  15
  16 .irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
  17     .section .text$\i\()a, "xr"
  18     .balign 8192
  19 func\i:
  20     bne far_func\i
  21     bne func_within_margin\i
  22     // Originally, the first section is less than 8192 bytes large, and the
  23     // second one follows almost directly. After adding one thunk after
  24     // the first section, the second one will move forward by 8192 bytes
  25     // due to the alignment.
  26     .space 8192 - 8 - 4
  27
  28     .section .text$\i\()b, "xr"
  29     .balign 8192
  30 align\i:
  31     nop
  32 .endr
  33
  34     .section .text$999, "xr"
  35 tail:
  36     .space 0x100000 - 100*1024 - 18*8192*2
  37     // Initially, these symbols are within range from all the sections above,
  38     // even when taking the initial margin into account. After adding thunks
  39     // to all the sections above, some of these are also out of range, forcing
  40     // running a second pass.
  41 .irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
  42 func_within_margin\i:
  43     nop
  44 .endr
  45     .space 0x100000
  46
  47     // These are always out of range.
  48 .irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
  49 far_func\i:
  50     nop
  51 .endr
  52     bx lr
  53
  54 // FUNC01: 403000:       41 f0 fc 87     bne.w   #8184 <.text+0x3ffc>
  55 // FUNC01: 403004:       41 f0 ff 87     bne.w   #8190 <.text+0x4006>
  56
  57 // Check that we only have two thunks here, even if we created the first
  58 // thunk twice (once in the first pass, then thrown away and recreated
  59 // in the second pass).
  60
  61 // FUNC01-THUNKS: 404ffa:       00 00           movs    r0,  r0
  62 // The instruction above is padding from the .space
  63 // FUNC01-THUNKS: 404ffc:       47 f2 1e 0c     movw    r12, #28702
  64 // FUNC01-THUNKS: 405000:       c0 f2 20 0c     movt    r12, #32
  65 // FUNC01-THUNKS: 405004:       e7 44           add     pc,  r12
  66 // FUNC01-THUNKS: 405006:       46 f6 f0 7c     movw    r12, #28656
  67 // FUNC01-THUNKS: 40500a:       c0 f2 10 0c     movt    r12, #16
  68 // FUNC01-THUNKS: 40500e:       e7 44           add     pc, r12
  69 // The instruction below is padding from the .balign
  70 // FUNC01-THUNKS: 405010:       cc cc           ldm     r4!, {r2, r3, r6, r7}