lld/test/wasm/shared64.s

   1 # RUN: llvm-mc -filetype=obj -triple=wasm64-unknown-unknown -o %t.o %s
   2 # RUN: wasm-ld -mwasm64 --experimental-pic -shared -o %t.wasm %t.o
   3 # RUN: obj2yaml %t.wasm | FileCheck %s
   4 # RUN: llvm-objdump --disassemble-symbols=__wasm_call_ctors,__wasm_apply_data_relocs --no-show-raw-insn --no-leading-addr %t.wasm | FileCheck %s --check-prefixes DIS
   5
   6 .functype func_external () -> ()
   7
   8 # Linker-synthesized globals
   9 .globaltype __stack_pointer, i64
  10 .globaltype     __table_base, i64, immutable
  11 .globaltype     __memory_base, i64, immutable
  12
  13 .section .data.data,"",@
  14 data:
  15   .p2align 2
  16   .int32 2
  17   .size data, 4
  18
  19 .section .data.indirect_func_external,"",@
  20 indirect_func_external:
  21   .int64 func_external
  22 .size indirect_func_external, 8
  23
  24 .section .data.indirect_func,"",@
  25 indirect_func:
  26   .int64 foo
  27   .size indirect_func, 8
  28
  29 # Test data relocations
  30
  31 .section .data.data_addr,"",@
  32 data_addr:
  33   .int32 data
  34   .size data_addr, 4
  35
  36 # .. against external symbols
  37
  38 .section .data.data_addr_external,"",@
  39 data_addr_external:
  40   .int64 data_external
  41   .size data_addr_external, 8
  42
  43 # .. including addends
  44
  45 .section .data.extern_struct_internal_ptr,"",@
  46 extern_struct_internal_ptr:
  47   .int32 extern_struct + 4
  48   .size extern_struct_internal_ptr, 4
  49
  50 # Test use of __stack_pointer
  51
  52 .section .text,"",@
  53 foo:
  54   # %ptr = alloca i32
  55   # %0 = load i32, i32* @data, align 4
  56   # %1 = load i32 ()*, i32 ()** @indirect_func, align 4
  57   # call i32 %1()
  58   # ret i32 %0
  59   .functype foo () -> (i32)
  60   .local    i64, i32
  61   global.get  __stack_pointer
  62   i64.const 16
  63   i64.sub
  64   local.tee 0
  65   global.set  __stack_pointer
  66   global.get  __memory_base
  67   i64.const data@MBREL
  68   i64.add
  69   i32.load  0
  70   local.set 1
  71   global.get  indirect_func@GOT
  72   i64.load  0
  73   i32.wrap_i64
  74   call_indirect  () -> (i32)
  75   drop
  76   local.get 0
  77   i64.const 16
  78   i64.add
  79   global.set  __stack_pointer
  80   local.get 1
  81   end_function
  82
  83 get_func_address:
  84   .functype get_func_address () -> (i64)
  85   global.get func_external@GOT
  86   end_function
  87
  88 get_data_address:
  89   .functype get_data_address () -> (i64)
  90   global.get  data_external@GOT
  91   end_function
  92
  93 get_local_func_address:
  94   # Verify that a function which is otherwise not address taken *is* added to
  95   # the wasm table with referenced via R_WASM_TABLE_INDEX_REL_SLEB64
  96   .functype get_local_func_address () -> (i64)
  97   global.get  __table_base
  98   i64.const get_func_address@TBREL
  99   i64.add
 100   end_function
 101
 102 .globl foo
 103 .globl data
 104 .globl indirect_func
 105 .globl indirect_func_external
 106 .globl data_addr
 107 .globl data_addr_external
 108 .globl extern_struct_internal_ptr
 109 .globl get_data_address
 110 .globl get_func_address
 111 .globl get_local_func_address
 112
 113 .hidden foo
 114 .hidden data
 115 .hidden get_data_address
 116 .hidden get_func_address
 117
 118 # Without this linking will fail because we import __stack_pointer (a mutable
 119 # global).
 120 # TODO(sbc): We probably want a nicer way to specify target_features section
 121 # in assembly.
 122 .section .custom_section.target_features,"",@
 123 .int8 1
 124 .int8 43
 125 .int8 15
 126 .ascii "mutable-globals"
 127
 128 # check for dylink section at start
 129
 130 # CHECK:      Sections:
 131 # CHECK-NEXT:   - Type:            CUSTOM
 132 # CHECK-NEXT:     Name:            dylink.0
 133 # CHECK-NEXT:     MemorySize:      36
 134 # CHECK-NEXT:     MemoryAlignment: 2
 135 # CHECK-NEXT:     TableSize:       2
 136 # CHECK-NEXT:     TableAlignment:  0
 137 # CHECK-NEXT:     Needed:          []
 138 # CHECK-NEXT:   - Type:            TYPE
 139
 140 # check for import of __table_base and __memory_base globals
 141
 142 # CHECK:        - Type:            IMPORT
 143 # CHECK-NEXT:     Imports:
 144 # CHECK-NEXT:       - Module:          env
 145 # CHECK-NEXT:         Field:           memory
 146 # CHECK-NEXT:         Kind:            MEMORY
 147 # CHECK-NEXT:         Memory:
 148 # CHECK-NEXT:           Flags:         [ IS_64 ]
 149 # CHECK-NEXT:           Minimum:       0x1
 150 # CHECK-NEXT:       - Module:          env
 151 # CHECK-NEXT:         Field:           __indirect_function_table
 152 # CHECK-NEXT:         Kind:            TABLE
 153 # CHECK-NEXT:         Table:
 154 # CHECK-NEXT:           Index:           0
 155 # CHECK-NEXT:           ElemType:        FUNCREF
 156 # CHECK-NEXT:           Limits:
 157 # CHECK-NEXT:             Minimum:         0x2
 158 # CHECK-NEXT:       - Module:          env
 159 # CHECK-NEXT:         Field:           __stack_pointer
 160 # CHECK-NEXT:         Kind:            GLOBAL
 161 # CHECK-NEXT:         GlobalType:      I64
 162 # CHECK-NEXT:         GlobalMutable:   true
 163 # CHECK-NEXT:       - Module:          env
 164 # CHECK-NEXT:         Field:           __memory_base
 165 # CHECK-NEXT:         Kind:            GLOBAL
 166 # CHECK-NEXT:         GlobalType:      I64
 167 # CHECK-NEXT:         GlobalMutable:   false
 168 # CHECK-NEXT:       - Module:          env
 169 # CHECK-NEXT:         Field:           __table_base
 170 # CHECK-NEXT:         Kind:            GLOBAL
 171 # CHECK-NEXT:         GlobalType:      I64
 172 # CHECK-NEXT:         GlobalMutable:   false
 173 # CHECK-NEXT:       - Module:          env
 174 # CHECK-NEXT:         Field:           __table_base32
 175 # CHECK-NEXT:         Kind:            GLOBAL
 176 # CHECK-NEXT:         GlobalType:      I32
 177 # CHECK-NEXT:         GlobalMutable:   false
 178 # CHECK-NEXT:       - Module:          GOT.mem
 179 # CHECK-NEXT:         Field:           indirect_func
 180 # CHECK-NEXT:         Kind:            GLOBAL
 181 # CHECK-NEXT:         GlobalType:      I64
 182 # CHECK-NEXT:         GlobalMutable:   true
 183 # CHECK-NEXT:       - Module:          GOT.func
 184 # CHECK-NEXT:         Field:           func_external
 185 # CHECK-NEXT:         Kind:            GLOBAL
 186 # CHECK-NEXT:         GlobalType:      I64
 187 # CHECK-NEXT:         GlobalMutable:   true
 188 # CHECK-NEXT:       - Module:          GOT.mem
 189 # CHECK-NEXT:         Field:           data_external
 190 # CHECK-NEXT:         Kind:            GLOBAL
 191 # CHECK-NEXT:         GlobalType:      I64
 192 # CHECK-NEXT:         GlobalMutable:   true
 193 # CHECK-NEXT:       - Module:          GOT.mem
 194 # CHECK-NEXT:         Field:           extern_struct
 195 # CHECK-NEXT:         Kind:            GLOBAL
 196 # CHECK-NEXT:         GlobalType:      I64
 197 # CHECK-NEXT:         GlobalMutable:   true
 198 # CHECK-NEXT:   - Type:            FUNCTION
 199
 200 # CHECK:        - Type:            EXPORT
 201 # CHECK-NEXT:     Exports:
 202 # CHECK-NEXT:       - Name:            __wasm_call_ctors
 203 # CHECK-NEXT:         Kind:            FUNCTION
 204 # CHECK-NEXT:         Index:           0
 205
 206 # check for elem segment initialized with __table_base global as offset
 207
 208 # CHECK:        - Type:            ELEM
 209 # CHECK-NEXT:     Segments:
 210 # CHECK-NEXT:       - Offset:
 211 # CHECK-NEXT:           Opcode:          GLOBAL_GET
 212 # CHECK-NEXT:           Index:           3
 213 # CHECK-NEXT:         Functions:       [ 3, 2 ]
 214
 215 # check the generated code in __wasm_call_ctors and __wasm_apply_data_relocs functions
 216
 217 # DIS:      <__wasm_call_ctors>:
 218 # DIS-EMPTY:
 219 # DIS-NEXT:                 end
 220
 221 # DIS:      <__wasm_apply_data_relocs>:
 222 # DIS-EMPTY:
 223 # DIS-NEXT:                 i64.const       4
 224 # DIS-NEXT:                 global.get      1
 225 # DIS-NEXT:                 i64.add
 226 # DIS-NEXT:                 global.get      5
 227 # DIS-NEXT:                 i64.store       0:p2align=2
 228 # DIS-NEXT:                 i64.const       12
 229 # DIS-NEXT:                 global.get      1
 230 # DIS-NEXT:                 i64.add
 231 # DIS-NEXT:                 global.get      2
 232 # DIS-NEXT:                 i64.const       1
 233 # DIS-NEXT:                 i64.add
 234 # DIS-NEXT:                 i64.store       0:p2align=2
 235 # DIS-NEXT:                 i64.const       20
 236 # DIS-NEXT:                 global.get      1
 237 # DIS-NEXT:                 i64.add
 238 # DIS-NEXT:                 global.get      1
 239 # DIS-NEXT:                 i32.const       0
 240 # DIS-NEXT:                 i32.add
 241 # DIS-NEXT:                 i32.store       0
 242 # DIS-NEXT:                 i64.const       24
 243 # DIS-NEXT:                 global.get      1
 244 # DIS-NEXT:                 i64.add
 245 # DIS-NEXT:                 global.get      6
 246 # DIS-NEXT:                 i64.store       0:p2align=2
 247 # DIS-NEXT:                 i64.const       32
 248 # DIS-NEXT:                 global.get      1
 249 # DIS-NEXT:                 i64.add
 250 # DIS-NEXT:                 global.get      7
 251 # DIS-NEXT:                 i32.const       4
 252 # DIS-NEXT:                 i32.add
 253 # DIS-NEXT:                 i32.store       0
 254 # DIS-NEXT:                 end
 255
 256 # check the data segment initialized with __memory_base global as offset
 257
 258 # CHECK:        - Type:            DATA
 259 # CHECK-NEXT:     Segments:
 260 # CHECK-NEXT:       - SectionOffset:   6
 261 # CHECK-NEXT:         InitFlags:       0
 262 # CHECK-NEXT:         Offset:
 263 # CHECK-NEXT:           Opcode:          GLOBAL_GET
 264 # CHECK-NEXT:           Index:           1
 265 # CHECK-NEXT:         Content:         '020000000000000000000000010000000000000000000000000000000000000000000000'