lld/test/ELF/arm-gnu-ifunc.s

   1 // REQUIRES: arm
   2 // RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t.o
   3 // RUN: ld.lld %t.o -o %t
   4 // RUN: llvm-objdump --no-print-imm-hex --triple=armv7a-none-linux-gnueabi -d --no-show-raw-insn %t | FileCheck %s --check-prefix=DISASM
   5 // RUN: llvm-readobj -r --symbols --sections %t | FileCheck %s
   6  .syntax unified
   7  .text
   8  .globl bar, foo
   9  .type foo STT_GNU_IFUNC
  10 foo:
  11  bx lr
  12
  13  .type bar STT_GNU_IFUNC
  14 bar:
  15  bx lr
  16
  17  .globl _start
  18 _start:
  19  bl foo
  20  bl bar
  21  movw r0,:lower16:__rel_iplt_start
  22  movt r0,:upper16:__rel_iplt_start
  23  movw r0,:lower16:__rel_iplt_end
  24  movt r0,:upper16:__rel_iplt_end
  25
  26 // CHECK: Sections [
  27 // CHECK:   Section {
  28 // CHECK:        Section {
  29 // CHECK:          Name: .rel.dyn
  30 // CHECK-NEXT:     Type: SHT_REL
  31 // CHECK-NEXT:     Flags [
  32 // CHECK-NEXT:       SHF_ALLOC
  33 // CHECK-NEXT:     ]
  34 // CHECK-NEXT:     Address: 0x100F4
  35 // CHECK-NEXT:     Offset: 0xF4
  36 // CHECK-NEXT:     Size: 16
  37 // CHECK-NEXT:     Link:
  38 // CHECK-NEXT:     Info: 0
  39 // CHECK:          Name: .iplt
  40 // CHECK-NEXT:     Type: SHT_PROGBITS
  41 // CHECK-NEXT:     Flags [
  42 // CHECK-NEXT:       SHF_ALLOC
  43 // CHECK-NEXT:       SHF_EXECINSTR
  44 // CHECK-NEXT:     ]
  45 // CHECK-NEXT:     Address: 0x20130
  46 // CHECK-NEXT:     Offset: 0x130
  47 // CHECK-NEXT:     Size: 32
  48 // CHECK:          Index: 4
  49 // CHECK-NEXT:     Name: .got
  50 // CHECK-NEXT:     Type: SHT_PROGBITS
  51 // CHECK-NEXT:     Flags [
  52 // CHECK-NEXT:       SHF_ALLOC
  53 // CHECK-NEXT:       SHF_WRITE
  54 // CHECK-NEXT:     ]
  55 // CHECK-NEXT:     Address: 0x30150
  56 // CHECK-NEXT:     Offset: 0x150
  57 // CHECK-NEXT:     Size: 8
  58 // CHECK:      Relocations [
  59 // CHECK-NEXT:   Section (1) .rel.dyn {
  60 // CHECK-NEXT:     0x30150 R_ARM_IRELATIVE
  61 // CHECK-NEXT:     0x30154 R_ARM_IRELATIVE
  62 // CHECK-NEXT:   }
  63 // CHECK-NEXT: ]
  64 // CHECK:          Name: __rel_iplt_start
  65 // CHECK-NEXT:     Value: 0x100F4
  66 // CHECK-NEXT:     Size: 0
  67 // CHECK-NEXT:     Binding: Local
  68 // CHECK-NEXT:     Type: None
  69 // CHECK-NEXT:     Other [
  70 // CHECK-NEXT:       STV_HIDDEN
  71 // CHECK-NEXT:     ]
  72 // CHECK-NEXT:     Section: .rel.dyn
  73 // CHECK-NEXT:   }
  74 // CHECK-NEXT:   Symbol {
  75 // CHECK-NEXT:     Name: __rel_iplt_end
  76 // CHECK-NEXT:     Value: 0x10104
  77 // CHECK-NEXT:     Size: 0
  78 // CHECK-NEXT:     Binding: Local
  79 // CHECK-NEXT:     Type: None
  80 // CHECK-NEXT:     Other [
  81 // CHECK-NEXT:       STV_HIDDEN
  82 // CHECK-NEXT:     ]
  83 // CHECK-NEXT:     Section: .rel.dyn
  84 // CHECK-NEXT:   }
  85 // CHECK-NEXT:  Symbol {
  86 // CHECK-NEXT:    Name: bar
  87 // CHECK-NEXT:    Value: 0x20108
  88 // CHECK-NEXT:    Size: 0
  89 // CHECK-NEXT:    Binding: Global
  90 // CHECK-NEXT:    Type: GNU_IFunc
  91 // CHECK-NEXT:    Other: 0
  92 // CHECK-NEXT:    Section: .text
  93 // CHECK-NEXT:  }
  94 // CHECK-NEXT:  Symbol {
  95 // CHECK-NEXT:    Name: foo
  96 // CHECK-NEXT:    Value: 0x20104
  97 // CHECK-NEXT:    Size: 0
  98 // CHECK-NEXT:    Binding: Global
  99 // CHECK-NEXT:    Type: GNU_IFunc
 100 // CHECK-NEXT:    Other: 0
 101 // CHECK-NEXT:    Section: .text
 102 // CHECK-NEXT:  }
 103 // CHECK-NEXT:  Symbol {
 104 // CHECK-NEXT:    Name: _start
 105 // CHECK-NEXT:    Value: 0x2010C
 106 // CHECK-NEXT:    Size: 0
 107 // CHECK-NEXT:    Binding: Global
 108 // CHECK-NEXT:    Type: None
 109 // CHECK-NEXT:    Other:
 110 // CHECK-NEXT:    Section: .text
 111 // CHECK-NEXT:  }
 112
 113 // DISASM: Disassembly of section .text:
 114 // DISASM-EMPTY:
 115 // DISASM-NEXT: <foo>:
 116 // DISASM-NEXT:    20104:      bx      lr
 117 // DISASM: <bar>:
 118 // DISASM-NEXT:    20108:      bx      lr
 119 // DISASM: <_start>:
 120 // DISASM-NEXT:    2010c:      bl      0x20140
 121 // DISASM-NEXT:    20110:      bl      0x20130
 122 // 1 * 65536 + 244 = 0x100f4 __rel_iplt_start
 123 // DISASM-NEXT:    20114:      movw    r0, #244
 124 // DISASM-NEXT:    20118:      movt    r0, #1
 125 // 1 * 65536 + 260 = 0x10104 __rel_iplt_end
 126 // DISASM-NEXT:    2011c:      movw    r0, #260
 127 // DISASM-NEXT:    20120:      movt    r0, #1
 128 // DISASM-EMPTY:
 129 // DISASM-NEXT: Disassembly of section .iplt:
 130 // DISASM-EMPTY:
 131 // DISASM-NEXT: <.iplt>:
 132 // DISASM-NEXT:    20130:       add     r12, pc, #0, #12
 133 // DISASM-NEXT:    20134:       add     r12, r12, #16
 134 // DISASM-NEXT:    20138:       ldr     pc, [r12, #24]!
 135 // DISASM-NEXT:    2013c:       d4 d4 d4 d4     .word   0xd4d4d4d4
 136 // DISASM-NEXT:    20140:       add     r12, pc, #0, #12
 137 // DISASM-NEXT:    20144:       add     r12, r12, #16
 138 // DISASM-NEXT:    20148:       ldr     pc, [r12, #12]!
 139 // DISASM-NEXT:    2014c:       d4 d4 d4 d4     .word   0xd4d4d4d4