22b7b84860
Previously we would ignore all undefined symbols when using `-shared` or `-pie`. All undefined symbols would be treated as imports regardless of whether those symbols we defined in any shared library. With this change we now track symbol in shared libraries and report undefined symbols in the main program by default. The old behavior is still available via the `--unresolved-symbols=import-dynamic` command line flag. This rationale for allowing this type of breaking change is that `-pie` and `-shared` are both still experimental will warn as such, unless `--experimental-pic` is passed. As part of this change the linker now models shared library symbols via new SharedFunctionSymbol and SharedDataSymbol types. I've also added a new `--no-shlib-sigcheck` option that bypassed the checking of functions signature in shared libraries. This is specifically required by emscripten the case where the imports/exports of shared libraries have been modified by via JS type legalization (this is only needed when targeting old JS engines where bigint is not yet available See https://github.com/emscripten-core/emscripten/issues/18198
248 lines
9.1 KiB
ArmAsm
248 lines
9.1 KiB
ArmAsm
# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-emscripten -o %t.o %s
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# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-emscripten %S/Inputs/internal_func.s -o %t.internal_func.o
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# RUN: wasm-ld --no-gc-sections --experimental-pic -pie --unresolved-symbols=import-dynamic -o %t.wasm %t.o %t.internal_func.o
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# RUN: obj2yaml %t.wasm | FileCheck %s
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# 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 DISASSEM
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.functype external_func () -> ()
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.functype internal_func1 () -> (i32)
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.functype internal_func2 () -> (i32)
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.globaltype __stack_pointer, i32
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.section .data,"",@
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.p2align 2
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data:
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.int32 2
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.size data, 4
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indirect_func:
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.int32 foo
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.size indirect_func, 4
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data_addr:
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.int32 data
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.size data_addr, 4
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data_addr_external:
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.int32 data_external
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.size data_addr_external, 4
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.section .text,"",@
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foo:
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.functype foo () -> (i32)
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global.get data@GOT
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i32.load 0
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drop
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global.get indirect_func@GOT
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i32.load 0
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call_indirect () -> (i32)
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drop
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global.get __stack_pointer
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end_function
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get_data_address:
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.functype get_data_address () -> (i32)
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global.get data_addr_external@GOT
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end_function
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get_internal_func1_address:
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.functype get_internal_func1_address () -> (i32)
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global.get internal_func1@GOT
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end_function
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get_internal_func2_address:
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.functype get_internal_func2_address () -> (i32)
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global.get internal_func2@GOT
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end_function
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.globl _start
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_start:
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.functype _start () -> ()
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call external_func
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end_function
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.section .custom_section.target_features,"",@
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.int8 2
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.int8 43
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.int8 7
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.ascii "atomics"
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.int8 43
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.int8 11
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.ascii "bulk-memory"
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# CHECK: Sections:
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# CHECK-NEXT: - Type: CUSTOM
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# CHECK-NEXT: Name: dylink.0
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# CHECK-NEXT: MemorySize: 16
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# CHECK-NEXT: MemoryAlignment: 2
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# CHECK-NEXT: TableSize: 3
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# CHECK-NEXT: TableAlignment: 0
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# CHECK-NEXT: Needed: []
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# CHECK: - Type: IMPORT
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# CHECK-NEXT: Imports:
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# CHECK-NEXT: - Module: env
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# CHECK-NEXT: Field: __indirect_function_table
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# CHECK-NEXT: Kind: TABLE
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# CHECK-NEXT: Table:
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# CHECK-NEXT: Index: 0
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# CHECK-NEXT: ElemType: FUNCREF
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# CHECK-NEXT: Limits:
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# CHECK-NEXT: Minimum: 0x3
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# CHECK-NEXT: - Module: env
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# CHECK-NEXT: Field: __stack_pointer
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# CHECK-NEXT: Kind: GLOBAL
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# CHECK-NEXT: GlobalType: I32
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# CHECK-NEXT: GlobalMutable: true
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# CHECK-NEXT: - Module: env
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# CHECK-NEXT: Field: __memory_base
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# CHECK-NEXT: Kind: GLOBAL
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# CHECK-NEXT: GlobalType: I32
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# CHECK-NEXT: GlobalMutable: false
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# CHECK-NEXT: - Module: env
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# CHECK-NEXT: Field: __table_base
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# CHECK-NEXT: Kind: GLOBAL
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# CHECK-NEXT: GlobalType: I32
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# CHECK-NEXT: GlobalMutable: false
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# CHECK: - Type: START
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# CHECK-NEXT: StartFunction: 3
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# CHECK: - Type: CUSTOM
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# CHECK-NEXT: Name: name
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# CHECK-NEXT: FunctionNames:
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# CHECK-NEXT: - Index: 0
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# CHECK-NEXT: Name: external_func
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# CHECK-NEXT: - Index: 1
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# CHECK-NEXT: Name: __wasm_call_ctors
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# CHECK-NEXT: - Index: 2
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# CHECK-NEXT: Name: __wasm_apply_data_relocs
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# CHECK-NEXT: - Index: 3
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# CHECK-NEXT: Name: __wasm_apply_global_relocs
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# CHECK-NEXT: - Index: 4
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# CHECK-NEXT: Name: foo
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# CHECK-NEXT: - Index: 5
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# CHECK-NEXT: Name: get_data_address
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# CHECK-NEXT: - Index: 6
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# CHECK-NEXT: Name: get_internal_func1_address
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# CHECK-NEXT: - Index: 7
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# CHECK-NEXT: Name: get_internal_func2_address
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# CHECK-NEXT: - Index: 8
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# CHECK-NEXT: Name: _start
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# CHECK-NEXT: - Index: 9
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# CHECK-NEXT: Name: internal_func1
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# CHECK-NEXT: - Index: 10
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# CHECK-NEXT: Name: internal_func2
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# CHECK-NEXT: GlobalNames:
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# DISASSEM-LABEL: <__wasm_call_ctors>:
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# DISASSEM-EMPTY:
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# DISASSEM-NEXT: end
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# DISASSEM-LABEL: <__wasm_apply_data_relocs>:
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# DISASSEM: end
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# Run the same test with extended-const support. When this is available
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# we don't need __wasm_apply_global_relocs and instead rely on the add
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# instruction in the InitExpr. We also, therefore, do not need these globals
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# to be mutable.
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# RUN: wasm-ld --no-gc-sections --experimental-pic -pie --unresolved-symbols=import-dynamic --extra-features=extended-const -o %t.extended.wasm %t.o %t.internal_func.o
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# RUN: obj2yaml %t.extended.wasm | FileCheck %s --check-prefix=EXTENDED-CONST
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# EXTENDED-CONST-NOT: __wasm_apply_global_relocs
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# EXTENDED-CONST: - Type: GLOBAL
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# EXTENDED-CONST-NEXT: Globals:
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# EXTENDED-CONST-NEXT: - Index: 4
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# EXTENDED-CONST-NEXT: Type: I32
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# EXTENDED-CONST-NEXT: Mutable: false
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# EXTENDED-CONST-NEXT: InitExpr:
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# EXTENDED-CONST-NEXT: Opcode: GLOBAL_GET
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# EXTENDED-CONST-NEXT: Index: 1
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# EXTENDED-CONST-NEXT: - Index: 5
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# EXTENDED-CONST-NEXT: Type: I32
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# EXTENDED-CONST-NEXT: Mutable: false
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# EXTENDED-CONST-NEXT: InitExpr:
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# EXTENDED-CONST-NEXT: Extended: true
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# EXTENDED-CONST-NEXT: Body: 230141046A0B
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# EXTENDED-CONST-NEXT: - Index: 6
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# EXTENDED-CONST-NEXT: Type: I32
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# EXTENDED-CONST-NEXT: Mutable: false
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# EXTENDED-CONST-NEXT: InitExpr:
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# EXTENDED-CONST-NEXT: Extended: true
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# This instruction sequence decodes to:
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# (global.get[0x23] 0x1 i32.const[0x41] 0x0C i32.add[0x6A] end[0x0b])
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# EXTENDED-CONST-NEXT: Body: 2301410C6A0B
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# EXTENDED-CONST-NEXT: - Index: 7
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# EXTENDED-CONST-NEXT: Type: I32
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# EXTENDED-CONST-NEXT: Mutable: false
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# EXTENDED-CONST-NEXT: InitExpr:
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# EXTENDED-CONST-NEXT: Opcode: GLOBAL_GET
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# EXTENDED-CONST-NEXT: Index: 2
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# EXTENDED-CONST-NEXT: - Index: 8
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# EXTENDED-CONST-NEXT: Type: I32
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# EXTENDED-CONST-NEXT: Mutable: false
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# EXTENDED-CONST-NEXT: InitExpr:
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# EXTENDED-CONST-NEXT: Extended: true
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# This instruction sequence decodes to:
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# (global.get[0x23] 0x2 i32.const[0x41] 0x1 i32.add[0x6A] end[0x0b])
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# EXTENDED-CONST-NEXT: Body: 230241016A0B
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# EXTENDED-CONST-NOT: - Type: START
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# EXTENDED-CONST: FunctionNames:
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# EXTENDED-CONST-NEXT: - Index: 0
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# EXTENDED-CONST-NEXT: Name: external_func
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# EXTENDED-CONST-NEXT: - Index: 1
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# EXTENDED-CONST-NEXT: Name: __wasm_call_ctors
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# EXTENDED-CONST-NEXT: - Index: 2
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# EXTENDED-CONST-NEXT: Name: __wasm_apply_data_relocs
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# Run the same test with threading support. In this mode
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# we expect __wasm_init_memory and __wasm_apply_data_relocs
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# to be generated along with __wasm_start as the start
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# function.
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# RUN: wasm-ld --no-gc-sections --shared-memory --experimental-pic -pie --unresolved-symbols=import-dynamic -o %t.shmem.wasm %t.o %t.internal_func.o
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# RUN: obj2yaml %t.shmem.wasm | FileCheck %s --check-prefix=SHMEM
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# RUN: llvm-objdump --disassemble-symbols=__wasm_start --no-show-raw-insn --no-leading-addr %t.shmem.wasm | FileCheck %s --check-prefix DISASSEM-SHMEM
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# SHMEM: - Type: START
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# SHMEM-NEXT: StartFunction: 6
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# DISASSEM-SHMEM-LABEL: <__wasm_start>:
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# DISASSEM-SHMEM-EMPTY:
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# DISASSEM-SHMEM-NEXT: call 5
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# DISASSEM-SHMEM-NEXT: call 4
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# DISASSEM-SHMEM-NEXT: end
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# SHMEM: FunctionNames:
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# SHMEM-NEXT: - Index: 0
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# SHMEM-NEXT: Name: external_func
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# SHMEM-NEXT: - Index: 1
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# SHMEM-NEXT: Name: __wasm_call_ctors
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# SHMEM-NEXT: - Index: 2
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# SHMEM-NEXT: Name: __wasm_init_tls
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# SHMEM-NEXT: - Index: 3
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# SHMEM-NEXT: Name: __wasm_apply_data_relocs
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# SHMEM-NEXT: - Index: 4
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# SHMEM-NEXT: Name: __wasm_init_memory
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# SHMEM-NEXT: - Index: 5
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# SHMEM-NEXT: Name: __wasm_apply_global_relocs
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# SHMEM-NEXT: - Index: 6
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# SHMEM-NEXT: Name: __wasm_start
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# SHMEM-NEXT: - Index: 7
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# SHMEM-NEXT: Name: foo
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# SHMEM-NEXT: - Index: 8
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# SHMEM-NEXT: Name: get_data_address
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# SHMEM-NEXT: - Index: 9
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# SHMEM-NEXT: Name: get_internal_func1_address
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# SHMEM-NEXT: - Index: 10
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# SHMEM-NEXT: Name: get_internal_func2_address
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# SHMEM-NEXT: - Index: 11
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# SHMEM-NEXT: Name: _start
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