lld/test/ELF/arm-bl-v6.s

   1 // REQUIRES: arm
   2 // RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv6-none-linux-gnueabi %s -o %t
   3 // RUN: ld.lld %t -o %t2
   4 // RUN: llvm-objdump --no-print-imm-hex -d --triple=armv6-none-linux-gnueabi --start-address=0x21000 --stop-address=0x21008 %t2 | FileCheck --check-prefix=CHECK-ARM1 %s
   5 // RUN: llvm-objdump --no-print-imm-hex -d --triple=thumbv6-none-linux-gnueabi %t2 --start-address=0x21008 --stop-address=0x2100c | FileCheck --check-prefix=CHECK-THUMB1 %s
   6 // RUN: llvm-objdump --no-print-imm-hex -d --triple=armv6-none-linux-gnueabi --start-address=0x22100c --stop-address=0x221014 %t2 | FileCheck --check-prefix=CHECK-ARM2 %s
   7 // RUN: llvm-objdump --no-print-imm-hex -d --triple=thumbv6-none-linux-gnueabi %t2 --start-address=0x622000 --stop-address=0x622002 | FileCheck --check-prefix=CHECK-THUMB2 %s
   8
   9 // RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv6eb-none-linux-gnueabi %s -o %t
  10 // RUN: ld.lld %t -o %t2
  11 // RUN: llvm-objdump --no-print-imm-hex -d --triple=armv6eb-none-linux-gnueabi --start-address=0x21000 --stop-address=0x21008 %t2 | FileCheck --check-prefix=CHECK-ARM1 %s
  12 // RUN: llvm-objdump --no-print-imm-hex -d --triple=thumbv6eb-none-linux-gnueabi %t2 --start-address=0x21008 --stop-address=0x2100c | FileCheck --check-prefix=CHECK-THUMB1 %s
  13 // RUN: llvm-objdump --no-print-imm-hex -d --triple=armv6eb-none-linux-gnueabi --start-address=0x22100c --stop-address=0x221014 %t2 | FileCheck --check-prefix=CHECK-ARM2-EB %s
  14 // RUN: llvm-objdump --no-print-imm-hex -d --triple=thumbv6eb-none-linux-gnueabi %t2 --start-address=0x622000 --stop-address=0x622002 | FileCheck --check-prefix=CHECK-THUMB2 %s
  15
  16 // RUN: ld.lld --be8 %t -o %t2
  17 // RUN: llvm-objdump --no-print-imm-hex -d --triple=armv6eb-none-linux-gnueabi --start-address=0x21000 --stop-address=0x21008 %t2 | FileCheck --check-prefix=CHECK-ARM1 %s
  18 // RUN: llvm-objdump --no-print-imm-hex -d --triple=thumbv6eb-none-linux-gnueabi %t2 --start-address=0x21008 --stop-address=0x2100c | FileCheck --check-prefix=CHECK-THUMB1 %s
  19 // RUN: llvm-objdump --no-print-imm-hex -d --triple=armv6eb-none-linux-gnueabi --start-address=0x22100c --stop-address=0x221014 %t2 | FileCheck --check-prefix=CHECK-ARM2-EB %s
  20 // RUN: llvm-objdump --no-print-imm-hex -d --triple=thumbv6eb-none-linux-gnueabi %t2 --start-address=0x622000 --stop-address=0x622002 | FileCheck --check-prefix=CHECK-THUMB2 %s
  21
  22 /// On Arm v6 the range of a Thumb BL instruction is only 4 megabytes as the
  23 /// extended range encoding is not supported. The following example has a Thumb
  24 /// BL that is out of range on ARM v6 and requires a range extension thunk.
  25 /// As v6 does not support MOVT or MOVW instructions the Thunk must not
  26 /// use these instructions either.
  27
  28
  29 /// ARM v6 supports blx so we shouldn't see the blx not supported warning.
  30 // CHECK-NOT: warning: lld uses blx instruction, no object with architecture supporting feature detected.
  31  .text
  32  .syntax unified
  33  .cpu    arm1176jzf-s
  34  .globl _start
  35  .type   _start,%function
  36  .balign 0x1000
  37 _start:
  38   bl thumbfunc
  39   bx lr
  40
  41 // CHECK-ARM1: Disassembly of section .text:
  42 // CHECK-ARM1-EMPTY:
  43 // CHECK-ARM1-NEXT: <_start>:
  44 // CHECK-ARM1-NEXT:    21000:   fa000000        blx     0x21008 <thumbfunc>
  45 // CHECK-ARM1-NEXT:    21004:   e12fff1e        bx      lr
  46  .thumb
  47  .section .text.2, "ax", %progbits
  48  .globl thumbfunc
  49  .type thumbfunc,%function
  50 thumbfunc:
  51  bl farthumbfunc
  52
  53 // CHECK-THUMB1: <thumbfunc>:
  54 // CHECK-THUMB1-NEXT:    21008: f200 e800               blx     0x22100c <__ARMv5LongLdrPcThunk_farthumbfunc>
  55 /// 6 Megabytes, enough to make farthumbfunc out of range of caller
  56 /// on a v6 Arm, but not on a v7 Arm.
  57
  58  .section .text.3, "ax", %progbits
  59  .space 0x200000
  60 // CHECK-ARM2: <__ARMv5LongLdrPcThunk_farthumbfunc>:
  61 // CHECK-ARM2-NEXT:   22100c:   e51ff004        ldr     pc, [pc, #-4]
  62 // CHECK-ARM2-NEXT:   221010:   01 20 62 00     .word   0x00622001
  63 // CHECK-ARM2-EB: <__ARMv5LongLdrPcThunk_farthumbfunc>:
  64 // CHECK-ARM2-EB-NEXT:   22100c:   e51ff004        ldr     pc, [pc, #-4]
  65 // CHECK-ARM2-EB-NEXT:   221010:   00 62 20 01     .word   0x00622001
  66  .section .text.4, "ax", %progbits
  67  .space 0x200000
  68
  69  .section .text.5, "ax", %progbits
  70  .space 0x200000
  71
  72  .thumb
  73  .section .text.6, "ax", %progbits
  74  .balign 0x1000
  75  .globl farthumbfunc
  76  .type farthumbfunc,%function
  77 farthumbfunc:
  78  bx lr
  79 // CHECK-THUMB2: <farthumbfunc>:
  80 // CHECK-THUMB2-NEXT:   622000:        4770    bx      lr