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157 lines
5.9 KiB
157 lines
5.9 KiB
; 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_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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