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60ec30340f
Relocations of type R_WEBASSEMBLY_TABLE_INDEX represent places where the table index for a given function is needed. While the value stored in this location is a table index, the index in the relocation entry itself is a function index (the index of the function which is to be called indirectly). This is how is was spec'd originally but the LLVM implementation didn't do this. This makes things a little simpler in the linker since the table in the input file can essentially be ignored that the output table can be created purely based on these relocations. Patch by Nicholas Wilson! Differential Revision: https://reviews.llvm.org/D42080 llvm-svn: 323165
252 lines
10 KiB
LLVM
252 lines
10 KiB
LLVM
; RUN: llc -mtriple wasm32-unknown-unknown-wasm -filetype=obj %s -o %t.o
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; RUN: obj2yaml %t.o | FileCheck %s
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; RUN: llvm-objdump -t %t.o | FileCheck --check-prefix=CHECK-SYMS %s
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; 'foo_alias()' is weak alias of function 'foo()'
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; 'bar_alias' is weak alias of global variable 'bar'
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; Generates two exports of the same function, one of them weak
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@bar = global i32 7, align 8
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@bar_alias = weak hidden alias i32, i32* @bar
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@foo_alias = weak hidden alias i32 (), i32 ()* @foo
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@direct_address = global i32()* @foo, align 8
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@alias_address = global i32()* @foo_alias, align 8
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define hidden i32 @foo() #0 {
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entry:
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ret i32 0
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}
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define hidden i32 @call_direct() #0 {
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entry:
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%call = call i32 @foo()
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ret i32 %call
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}
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define hidden i32 @call_alias() #0 {
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entry:
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%call = call i32 @foo_alias()
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ret i32 %call
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}
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define hidden i32 @call_direct_ptr() #0 {
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entry:
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%0 = load i32 ()*, i32 ()** @direct_address, align 8
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%call = call i32 %0()
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ret i32 %call
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}
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define hidden i32 @call_alias_ptr() #0 {
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entry:
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%0 = load i32 ()*, i32 ()** @alias_address, align 8
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%call = call i32 %0()
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ret i32 %call
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}
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; CHECK: - Type: TYPE
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; CHECK-NEXT: Signatures:
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; CHECK-NEXT: - Index: 0
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; CHECK-NEXT: ReturnType: I32
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; CHECK-NEXT: ParamTypes:
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; CHECK-NEXT: - Type: IMPORT
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; CHECK-NEXT: Imports:
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; CHECK-NEXT: - Module: env
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; CHECK-NEXT: Field: __linear_memory
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; CHECK-NEXT: Kind: MEMORY
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; CHECK-NEXT: Memory:
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; CHECK-NEXT: Initial: 0x00000001
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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: ElemType: ANYFUNC
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; CHECK-NEXT: Limits:
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; CHECK-NEXT: Initial: 0x00000002
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; CHECK-NEXT: - Module: env
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; CHECK-NEXT: Field: foo_alias
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: SigIndex: 0
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; CHECK-NEXT: - Module: env
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; CHECK-NEXT: Field: bar_alias
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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: - Type: FUNCTION
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; CHECK-NEXT: FunctionTypes: [ 0, 0, 0, 0, 0 ]
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; CHECK-NEXT: - Type: GLOBAL
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; CHECK-NEXT: Globals:
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; CHECK-NEXT: - Index: 1
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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: 8
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; CHECK-NEXT: - Index: 2
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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: 16
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; CHECK-NEXT: - Index: 3
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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-NEXT: - Type: EXPORT
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; CHECK-NEXT: Exports:
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; CHECK-NEXT: - Name: foo
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: - Name: call_direct
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 2
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; CHECK-NEXT: - Name: call_alias
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 3
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; CHECK-NEXT: - Name: call_direct_ptr
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 4
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; CHECK-NEXT: - Name: direct_address
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; CHECK-NEXT: Kind: GLOBAL
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: - Name: call_alias_ptr
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 5
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; CHECK-NEXT: - Name: alias_address
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; CHECK-NEXT: Kind: GLOBAL
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; CHECK-NEXT: Index: 2
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; CHECK-NEXT: - Name: bar
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; CHECK-NEXT: Kind: GLOBAL
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; CHECK-NEXT: Index: 3
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; CHECK-NEXT: - Name: foo_alias
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: - Name: bar_alias
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; CHECK-NEXT: Kind: GLOBAL
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; CHECK-NEXT: Index: 3
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; CHECK-NEXT: - Type: ELEM
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; CHECK-NEXT: Segments:
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; CHECK-NEXT: - Offset:
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; CHECK-NEXT: Opcode: I32_CONST
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; CHECK-NEXT: Value: 1
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; CHECK-NEXT: Functions: [ 1, 0 ]
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; CHECK-NEXT: - Type: CODE
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; CHECK-NEXT: Relocations:
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; CHECK-NEXT: - Type: R_WEBASSEMBLY_FUNCTION_INDEX_LEB
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: Offset: 0x00000009
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; CHECK-NEXT: - Type: R_WEBASSEMBLY_FUNCTION_INDEX_LEB
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; CHECK-NEXT: Index: 0
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; CHECK-NEXT: Offset: 0x00000012
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; CHECK-NEXT: - Type: R_WEBASSEMBLY_MEMORY_ADDR_LEB
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: Offset: 0x0000001E
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; CHECK-NEXT: - Type: R_WEBASSEMBLY_TYPE_INDEX_LEB
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; CHECK-NEXT: Index: 0
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; CHECK-NEXT: Offset: 0x00000024
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; CHECK-NEXT: - Type: R_WEBASSEMBLY_MEMORY_ADDR_LEB
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; CHECK-NEXT: Index: 2
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; CHECK-NEXT: Offset: 0x00000031
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; CHECK-NEXT: - Type: R_WEBASSEMBLY_TYPE_INDEX_LEB
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; CHECK-NEXT: Index: 0
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; CHECK-NEXT: Offset: 0x00000037
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; CHECK-NEXT: Functions:
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; CHECK-NEXT: - Index: 1
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 41000B
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; CHECK-NEXT: - Index: 2
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 1081808080000B
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; CHECK-NEXT: - Index: 3
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 1080808080000B
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; CHECK-NEXT: - Index: 4
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 410028028880808000118080808000000B
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; CHECK-NEXT: - Index: 5
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 410028029080808000118080808000000B
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; CHECK-NEXT: - Type: DATA
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; CHECK-NEXT: Relocations:
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; CHECK-NEXT: - Type: R_WEBASSEMBLY_TABLE_INDEX_I32
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: Offset: 0x0000000F
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; CHECK-NEXT: - Type: R_WEBASSEMBLY_TABLE_INDEX_I32
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; CHECK-NEXT: Index: 0
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; CHECK-NEXT: Offset: 0x00000018
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; CHECK-NEXT: Segments:
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; CHECK-NEXT: - SectionOffset: 6
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; CHECK-NEXT: MemoryIndex: 0
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; CHECK-NEXT: Offset:
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; CHECK-NEXT: Opcode: I32_CONST
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; CHECK-NEXT: Value: 0
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; CHECK-NEXT: Content: '07000000'
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; CHECK-NEXT: - SectionOffset: 15
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; CHECK-NEXT: MemoryIndex: 0
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; CHECK-NEXT: Offset:
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; CHECK-NEXT: Opcode: I32_CONST
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; CHECK-NEXT: Value: 8
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; CHECK-NEXT: Content: '01000000'
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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: foo_alias
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; CHECK-NEXT: - Index: 1
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; CHECK-NEXT: Name: foo
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; CHECK-NEXT: - Index: 2
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; CHECK-NEXT: Name: call_direct
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; CHECK-NEXT: - Index: 3
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; CHECK-NEXT: Name: call_alias
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; CHECK-NEXT: - Index: 4
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; CHECK-NEXT: Name: call_direct_ptr
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; CHECK-NEXT: - Index: 5
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; CHECK-NEXT: Name: call_alias_ptr
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; CHECK-NEXT: - Type: CUSTOM
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; CHECK-NEXT: Name: linking
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; CHECK-NEXT: DataSize: 20
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; CHECK-NEXT: SymbolInfo:
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; CHECK-NEXT: - Name: foo_alias
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; CHECK-NEXT: Flags: [ BINDING_WEAK, VISIBILITY_HIDDEN ]
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; CHECK-NEXT: - Name: bar_alias
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; CHECK-NEXT: Flags: [ BINDING_WEAK, VISIBILITY_HIDDEN ]
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; CHECK-NEXT: - Name: foo
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; CHECK-NEXT: Flags: [ VISIBILITY_HIDDEN ]
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; CHECK-NEXT: - Name: call_direct
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; CHECK-NEXT: Flags: [ VISIBILITY_HIDDEN ]
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; CHECK-NEXT: - Name: call_alias
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; CHECK-NEXT: Flags: [ VISIBILITY_HIDDEN ]
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; CHECK-NEXT: - Name: call_direct_ptr
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; CHECK-NEXT: Flags: [ VISIBILITY_HIDDEN ]
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; CHECK-NEXT: - Name: call_alias_ptr
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; CHECK-NEXT: Flags: [ VISIBILITY_HIDDEN ]
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; CHECK-NEXT: SegmentInfo:
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; CHECK-NEXT: - Index: 0
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; CHECK-NEXT: Name: .data.bar
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; CHECK-NEXT: Alignment: 8
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; CHECK-NEXT: Flags: [ ]
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; CHECK-NEXT: - Index: 1
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; CHECK-NEXT: Name: .data.direct_address
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; CHECK-NEXT: Alignment: 8
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; CHECK-NEXT: Flags: [ ]
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; CHECK-NEXT: - Index: 2
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; CHECK-NEXT: Name: .data.alias_address
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; CHECK-NEXT: Alignment: 8
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; CHECK-NEXT: Flags: [ ]
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; CHECK-NEXT: ...
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; CHECK-SYMS: SYMBOL TABLE:
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; CHECK-SYMS-NEXT: 00000001 gw F EXPORT .hidden foo_alias
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; CHECK-SYMS-NEXT: 00000000 gw EXPORT .hidden bar_alias
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; CHECK-SYMS-NEXT: 00000001 g F EXPORT .hidden foo
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; CHECK-SYMS-NEXT: 00000002 g F EXPORT .hidden call_direct
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; CHECK-SYMS-NEXT: 00000003 g F EXPORT .hidden call_alias
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; CHECK-SYMS-NEXT: 00000004 g F EXPORT .hidden call_direct_ptr
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; CHECK-SYMS-NEXT: 00000008 g EXPORT direct_address
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; CHECK-SYMS-NEXT: 00000005 g F EXPORT .hidden call_alias_ptr
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; CHECK-SYMS-NEXT: 00000010 g EXPORT alias_address
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; CHECK-SYMS-NEXT: 00000000 g EXPORT bar
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