4fc2557308
MVP object files may import at most one table, and if they do, it must be assigned table number zero in the output, as the references to that table are not relocatable. Ensure that this is the case, even if some inputs define other tables. Differential Revision: https://reviews.llvm.org/D96001
157 lines
5.9 KiB
LLVM
157 lines
5.9 KiB
LLVM
; RUN: llc -relocation-model=pic -mattr=+mutable-globals -filetype=obj %s -o %t.o
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; RUN: wasm-ld --experimental-pic -shared -o %t.wasm %t.o
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; RUN: obj2yaml %t.wasm | FileCheck %s
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target triple = "wasm32-unknown-emscripten"
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@data = hidden global i32 2, align 4
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@data_external = external global i32
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@indirect_func = local_unnamed_addr global i32 ()* @foo, align 4
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@indirect_func_external = local_unnamed_addr global void ()* @func_external, align 4
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; Test data relocations
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@data_addr = local_unnamed_addr global i32* @data, align 4
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; .. against external symbols
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@data_addr_external = local_unnamed_addr global i32* @data_external, align 4
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; .. including addends
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%struct.s = type { i32, i32 }
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@extern_struct = external global %struct.s
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@extern_struct_internal_ptr = local_unnamed_addr global i32* getelementptr inbounds (%struct.s, %struct.s* @extern_struct, i32 0, i32 1), align 4
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define hidden i32 @foo() {
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entry:
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; To ensure we use __stack_pointer
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%ptr = alloca i32
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%0 = load i32, i32* @data, align 4
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%1 = load i32 ()*, i32 ()** @indirect_func, align 4
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call i32 %1()
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ret i32 %0
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}
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define hidden i32* @get_data_address() {
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entry:
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ret i32* @data_external
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}
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define hidden i8* @get_func_address() {
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entry:
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ret i8* bitcast (void ()* @func_external to i8*)
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}
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define default i8* @get_local_func_address() {
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entry:
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; Verify that a function which is otherwise not address taken *is* added to
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; the wasm table with referenced via R_WASM_TABLE_INDEX_REL_SLEB
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ret i8* bitcast (i8* ()* @get_func_address to i8*)
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}
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declare void @func_external()
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; check for dylink section at start
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; CHECK: Sections:
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; CHECK-NEXT: - Type: CUSTOM
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; CHECK-NEXT: Name: dylink
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; CHECK-NEXT: MemorySize: 24
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; CHECK-NEXT: MemoryAlignment: 2
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; CHECK-NEXT: TableSize: 2
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; CHECK-NEXT: TableAlignment: 0
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; CHECK-NEXT: Needed: []
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; CHECK-NEXT: - Type: TYPE
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; check for import of __table_base and __memory_base globals
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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: memory
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; CHECK-NEXT: Kind: MEMORY
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; CHECK-NEXT: Memory:
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; CHECK-NEXT: Initial: 0x1
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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: Initial: 0x2
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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-NEXT: - Module: env
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; CHECK-NEXT: Field: func_external
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: SigIndex: 1
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; CHECK-NEXT: - Module: GOT.mem
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; CHECK-NEXT: Field: indirect_func
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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: GOT.func
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; CHECK-NEXT: Field: func_external
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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: GOT.mem
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; CHECK-NEXT: Field: data_external
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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: GOT.mem
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; CHECK-NEXT: Field: extern_struct
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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: - Type: FUNCTION
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; CHECK: - Type: EXPORT
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; CHECK-NEXT: Exports:
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; CHECK-NEXT: - Name: __wasm_call_ctors
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 1
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; check for elem segment initialized with __table_base global as offset
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; CHECK: - Type: ELEM
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; CHECK-NEXT: Segments:
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; CHECK-NEXT: - Offset:
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; CHECK-NEXT: Opcode: GLOBAL_GET
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; CHECK-NEXT: Index: 2
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; CHECK-NEXT: Functions: [ 4, 3 ]
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; check the generated code in __wasm_call_ctors and __wasm_apply_data_relocs functions
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; TODO(sbc): Disassemble and verify instructions.
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; CHECK: - Type: CODE
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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: 10020B
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; CHECK-NEXT: - Index: 2
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; CHECK-NEXT: Locals: []
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; CHECK-NEXT: Body: 230141046A230241016A360200230141086A23043602002301410C6A230141006A360200230141106A2305360200230141146A230641046A3602000B
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; check the data segment initialized with __memory_base global as offset
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; CHECK: - Type: DATA
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; CHECK-NEXT: Segments:
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; CHECK-NEXT: - SectionOffset: 6
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; CHECK-NEXT: InitFlags: 0
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; CHECK-NEXT: Offset:
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; CHECK-NEXT: Opcode: GLOBAL_GET
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: Content: '020000000100000000000000000000000000000000000000'
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