derek.holloway
7502bf64a4
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89 lines
2.9 KiB
ArmAsm
89 lines
2.9 KiB
ArmAsm
# Checks handling of undefined weak external functions. When the
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# static linker decides they are undefined, check GOT relocations
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# resolve to zero (i.e. a global that contains zero.).
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#
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# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t.o %s
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# RUN: wasm-ld %t.o -o %t1.wasm
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# RUN: obj2yaml %t1.wasm | FileCheck %s
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#
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# With `--unresolved-symbols=ignore-all` the behaviour should be the same
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# as the default.>
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#
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# RUN: wasm-ld --unresolved-symbols=ignore-all %t.o -o %t2.wasm
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# RUN: obj2yaml %t2.wasm | FileCheck %s
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.functype foo () -> (i32)
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.globl get_foo_addr
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get_foo_addr:
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.functype get_foo_addr () -> (i32)
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global.get foo@GOT
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end_function
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.globl _start
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_start:
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.functype _start () -> (i32)
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call get_foo_addr
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call foo
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drop
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end_function
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.weak foo
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# Verify that we do not generate dynamic relocations for the GOT entry.
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# CHECK-NOT: __wasm_apply_global_relocs
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# Verify that we do not generate an import for foo
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# CHECK-NOT: - Type: IMPORT
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# CHECK: - Type: GLOBAL
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# CHECK-NEXT: Globals:
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# Global 'undefined_weak:foo' representing the GOT entry for foo
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# Unlike other internal GOT entries that need to be mutable this one
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# is immutable and not updated by `__wasm_apply_global_relocs`
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# CHECK-NEXT: - Index: 0
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# CHECK-NEXT: Type: I32
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# CHECK-NEXT: Mutable: false
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# CHECK-NEXT: InitExpr:
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# CHECK-NEXT: Opcode: I32_CONST
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# CHECK-NEXT: Value: 0
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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: 'undefined_weak:foo'
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# CHECK-NEXT: - Index: 1
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# CHECK-NEXT: Name: get_foo_addr
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# CHECK-NEXT: - Index: 2
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# CHECK-NEXT: Name: _start
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# CHECK-NEXT: GlobalNames:
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# CHECK-NEXT: - Index: 0
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# CHECK-NEXT: Name: 'GOT.func.internal.undefined_weak:foo'
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# With `-pie` or `-shared` the resolution should be deferred to the dynamic
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# linker and the function address should be imported as GOT.func.foo.
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#
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# RUN: wasm-ld -pie %t.o -o %t3.wasm
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# RUN: obj2yaml %t3.wasm | FileCheck %s --check-prefix=IMPORT
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# IMPORT: - Type: IMPORT
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# IMPORT: Field: foo
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# IMPORT-NEXT: Kind: FUNCTION
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# IMPORT-NEXT: SigIndex: 0
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# IMPORT-NEXT: - Module: GOT.func
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# IMPORT-NEXT: Field: foo
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# IMPORT-NEXT: Kind: GLOBAL
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# IMPORT-NEXT: GlobalType: I32
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# IMPORT-NEXT: GlobalMutable: true
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# IMPORT: GlobalNames:
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# IMPORT-NEXT: - Index: 0
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# IMPORT-NEXT: Name: __memory_base
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# IMPORT-NEXT: - Index: 1
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# IMPORT-NEXT: Name: __table_base
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# IMPORT-NEXT: - Index: 2
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# IMPORT-NEXT: Name: foo
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