shared.ll
5.81 KB
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; RUN: llc -relocation-model=pic -filetype=obj %s -o %t.o
; RUN: wasm-ld -shared -o %t.wasm %t.o
; RUN: obj2yaml %t.wasm | FileCheck %s
target triple = "wasm32-unknown-emscripten"
@data = hidden global i32 2, align 4
@data_external = external global i32
@indirect_func = local_unnamed_addr global i32 ()* @foo, align 4
@indirect_func_external = local_unnamed_addr global void ()* @func_external, align 4
; Test data relocations
@data_addr = local_unnamed_addr global i32* @data, align 4
; .. against external symbols
@data_addr_external = local_unnamed_addr global i32* @data_external, align 4
; .. including addends
%struct.s = type { i32, i32 }
@extern_struct = external global %struct.s
@extern_struct_internal_ptr = local_unnamed_addr global i32* getelementptr inbounds (%struct.s, %struct.s* @extern_struct, i32 0, i32 1), align 4
define hidden i32 @foo() {
entry:
; To ensure we use __stack_pointer
%ptr = alloca i32
%0 = load i32, i32* @data, align 4
%1 = load i32 ()*, i32 ()** @indirect_func, align 4
call i32 %1()
ret i32 %0
}
define hidden i32* @get_data_address() {
entry:
ret i32* @data_external
}
define hidden i8* @get_func_address() {
entry:
ret i8* bitcast (void ()* @func_external to i8*)
}
define default i8* @get_local_func_address() {
entry:
; Verify that a function which is otherwise not address taken *is* added to
; the wasm table with referenced via R_WASM_TABLE_INDEX_REL_SLEB
ret i8* bitcast (i8* ()* @get_func_address to i8*)
}
declare void @func_external()
; check for dylink section at start
; CHECK: Sections:
; CHECK-NEXT: - Type: CUSTOM
; CHECK-NEXT: Name: dylink
; CHECK-NEXT: MemorySize: 24
; CHECK-NEXT: MemoryAlignment: 2
; CHECK-NEXT: TableSize: 2
; CHECK-NEXT: TableAlignment: 0
; CHECK-NEXT: Needed: []
; CHECK-NEXT: - Type: TYPE
; check for import of __table_base and __memory_base globals
; CHECK: - Type: IMPORT
; CHECK-NEXT: Imports:
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: memory
; CHECK-NEXT: Kind: MEMORY
; CHECK-NEXT: Memory:
; CHECK-NEXT: Initial: 0x0000000
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: __indirect_function_table
; CHECK-NEXT: Kind: TABLE
; CHECK-NEXT: Table:
; CHECK-NEXT: ElemType: FUNCREF
; CHECK-NEXT: Limits:
; CHECK-NEXT: Initial: 0x00000002
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: __stack_pointer
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: true
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: __memory_base
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: false
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: __table_base
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: false
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: func_external
; CHECK-NEXT: Kind: FUNCTION
; CHECK-NEXT: SigIndex: 1
; CHECK-NEXT: - Module: GOT.mem
; CHECK-NEXT: Field: indirect_func
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: true
; CHECK-NEXT: - Module: GOT.func
; CHECK-NEXT: Field: func_external
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: true
; CHECK-NEXT: - Module: GOT.mem
; CHECK-NEXT: Field: data_external
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: true
; CHECK-NEXT: - Module: GOT.mem
; CHECK-NEXT: Field: extern_struct
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: true
; CHECK-NEXT: - Type: FUNCTION
; CHECK: - Type: EXPORT
; CHECK-NEXT: Exports:
; CHECK-NEXT: - Name: __wasm_call_ctors
; CHECK-NEXT: Kind: FUNCTION
; CHECK-NEXT: Index: 1
; check for elem segment initialized with __table_base global as offset
; CHECK: - Type: ELEM
; CHECK-NEXT: Segments:
; CHECK-NEXT: - Offset:
; CHECK-NEXT: Opcode: GLOBAL_GET
; CHECK-NEXT: Index: 2
; CHECK-NEXT: Functions: [ 4, 3 ]
; check the generated code in __wasm_call_ctors and __wasm_apply_relocs functions
; TODO(sbc): Disassemble and verify instructions.
; CHECK: - Type: CODE
; CHECK-NEXT: Functions:
; CHECK-NEXT: - Index: 1
; CHECK-NEXT: Locals: []
; CHECK-NEXT: Body: 10020B
; CHECK-NEXT: - Index: 2
; CHECK-NEXT: Locals: []
; CHECK-NEXT: Body: 230141046A230241016A360200230141086A23043602002301410C6A230141006A360200230141106A2305360200230141146A230641046A3602000B
; check the data segment initialized with __memory_base global as offset
; CHECK: - Type: DATA
; CHECK-NEXT: Segments:
; CHECK-NEXT: - SectionOffset: 6
; CHECK-NEXT: InitFlags: 0
; CHECK-NEXT: Offset:
; CHECK-NEXT: Opcode: GLOBAL_GET
; CHECK-NEXT: Index: 1
; CHECK-NEXT: Content: '020000000100000000000000000000000000000000000000'