lld/test/ELF/arm-exidx-dedup.s

   1 // REQUIRES: arm
   2 // RUN: llvm-mc -filetype=obj --arm-add-build-attributes -triple=armv7a-none-linux-gnueabi %s -o %t
   3 // RUN: ld.lld %t --no-merge-exidx-entries -o %t2
   4 // RUN: llvm-objdump -s %t2 | FileCheck --check-prefix CHECK-DUPS %s
   5 // RUN: ld.lld %t -o %t3
   6 // RUN: llvm-objdump -s %t3 | FileCheck %s
   7
   8 /// Test that lld can at least remove duplicate .ARM.exidx sections. A more
   9 /// fine grained implementation will be able to remove duplicate entries within
  10 /// a .ARM.exidx section.
  11
  12 /// With duplicate entries
  13 // CHECK-DUPS: Contents of section .ARM.exidx:
  14 // CHECK-DUPS-NEXT: 100d4 78000100 01000000 74000100 01000000
  15 // CHECK-DUPS-NEXT: 100e4 70000100 01000000 6c000100 01000000
  16 // CHECK-DUPS-NEXT: 100f4 68000100 08849780 64000100 08849780
  17 // CHECK-DUPS-NEXT: 10104 60000100 08849780 5c000100 24000000
  18 // CHECK-DUPS-NEXT: 10114 58000100 28000000 54000100 01000000
  19 // CHECK-DUPS-NEXT: 10124 50000100 01000000 4c000100 01000000
  20 // CHECK-DUPS-NEXT: Contents of section .ARM.extab:
  21
  22 /// After duplicate entry removal
  23 // CHECK: Contents of section .ARM.exidx:
  24 // CHECK-NEXT: 100d4 48000100 01000000 50000100 08849780
  25 // CHECK-NEXT: 100e4 54000100 1c000000 50000100 20000000
  26 // CHECK-NEXT: 100f4 4c000100 01000000 4c000100 01000000
  27 // CHECK-NEXT: Contents of section .ARM.extab:
  28         .syntax unified
  29
  30         /// Expect 1 EXIDX_CANTUNWIND entry.
  31         .section .text.00, "ax", %progbits
  32         .globl _start
  33 _start:
  34         .fnstart
  35         bx lr
  36         .cantunwind
  37         .fnend
  38
  39         /// Expect .ARM.exidx.text.01 to be identical to .ARM.exidx.text.00
  40         .section .text.01, "ax", %progbits
  41         .globl f1
  42 f1:
  43         .fnstart
  44         bx lr
  45         .cantunwind
  46         .fnend
  47
  48         /// Expect 2 EXIDX_CANTUNWIND entries, these can be duplicated into
  49         /// .ARM.exid.text.00
  50         .section .text.02, "ax", %progbits
  51         .globl f2
  52 f2:
  53         .fnstart
  54         bx lr
  55         .cantunwind
  56         .fnend
  57
  58         .globl f3
  59 f3:
  60         .fnstart
  61         bx lr
  62         .cantunwind
  63         .fnend
  64
  65         /// Expect inline unwind instructions, not a duplicate of previous entry.
  66         .section .text.03, "ax", %progbits
  67         .global f4
  68 f4:
  69         .fnstart
  70         bx lr
  71         .save {r7, lr}
  72         .setfp r7, sp, #0
  73         .fnend
  74
  75         /// Expect 2 inline unwind entries that are a duplicate of
  76         /// .ARM.exidx.text.03
  77         .section .text.04, "ax", %progbits
  78         .global f5
  79 f5:
  80         .fnstart
  81         bx lr
  82         .save {r7, lr}
  83         .setfp r7, sp, #0
  84         .fnend
  85
  86         .global f6
  87 f6:
  88         .fnstart
  89         bx lr
  90         .save {r7, lr}
  91         .setfp r7, sp, #0
  92         .fnend
  93
  94         /// Expect a section with a reference to an .ARM.extab. Not a duplicate
  95         /// of previous inline table entry.
  96         .section .text.05, "ax",%progbits
  97         .global f7
  98 f7:
  99         .fnstart
 100         bx lr
 101         .personality __gxx_personality_v0
 102         .handlerdata
 103         .long 0
 104         .fnend
 105
 106         /// Expect a reference to an identical .ARM.extab. We do not try to
 107         /// deduplicate references to .ARM.extab sections.
 108         .section .text.06, "ax",%progbits
 109         .global f8
 110 f8:
 111         .fnstart
 112         bx lr
 113         .personality __gxx_personality_v0
 114         .handlerdata
 115         .long 0
 116         .fnend
 117
 118 /// Dummy implementation of personality routines to satisfy reference from
 119 /// exception tables
 120 /// Expect Linker generated EXIDX_CANTUNWIND tables
 121         .section .text.__gcc_personality_v0, "ax", %progbits
 122         .global __gxx_personality_v0
 123 __gxx_personality_v0:
 124         bx lr
 125
 126         .section .text.__aeabi_unwind_cpp_pr0, "ax", %progbits
 127         .global __aeabi_unwind_cpp_pr0
 128 __aeabi_unwind_cpp_pr0:
 129         bx lr