# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t.o %s
.globaltype __tls_base, i32
.globaltype __tls_align, i32, immutable
.globl tls1_addr
tls1_addr:
.functype tls1_addr () -> (i32)
global.get __tls_base
i32.const tls1@TLSREL
i32.add
end_function
.globl tls2_addr
tls2_addr:
.functype tls2_addr () -> (i32)
global.get __tls_base
i32.const tls2@TLSREL
i32.add
end_function
.globl tls3_addr
tls3_addr:
.functype tls3_addr () -> (i32)
global.get __tls_base
i32.const tls3
i32.add
end_function
.globl tls_align
tls_align:
.functype tls_align () -> (i32)
global.get __tls_align
end_function
# TLS symbols can also be accessed by `global.get tls1@GOT@TLS`
# which is the pattern emitted for non-DSO-local symbols.
# In this case the global that holds that address must be
# initialized by `__wasm_apply_global_tls_relocs` which is
# called by `__wasm_init_tls`.
.globl tls1_got_addr
tls1_got_addr:
.functype tls1_got_addr () -> (i32)
global.get tls1@GOT@TLS
end_function
.section .bss.no_tls,"",@
.globl no_tls
.p2align 2
no_tls:
.int32 0
.size no_tls, 4
// Older versions of LLVM did not use the "T" flag so we need to support
// infering TLS from the name alone.
.section .tdata.tls1,"",@
.globl tls1
.p2align 2
tls1:
.int32 1
.size tls1, 4
.section sec_tls2,"T",@
.globl tls2
.p2align 2
tls2:
.int32 1
.size tls2, 4
.section sec_tls3,"T",@
.globl tls3
.p2align 2
tls3:
.int32 0
.size tls3, 4
.section .custom_section.target_features,"",@
.int8 2
.int8 43
.int8 7
.ascii "atomics"
.int8 43
.int8 11
.ascii "bulk-memory"
# RUN: wasm-ld -no-gc-sections --shared-memory --max-memory=131072 --no-entry -o %t.wasm %t.o
# RUN: obj2yaml %t.wasm | FileCheck %s
# RUN: llvm-objdump -d --no-show-raw-insn --no-leading-addr %t.wasm | FileCheck --check-prefix=ASM %s --
# RUN: wasm-ld -no-gc-sections --shared-memory --max-memory=131072 --no-merge-data-segments --no-entry -o %t2.wasm %t.o
# RUN: obj2yaml %t2.wasm | FileCheck %s
# CHECK: - Type: GLOBAL
# __stack_pointer
# CHECK-NEXT: Globals:
# CHECK-NEXT: - Index: 0
# CHECK-NEXT: Type: I32
# CHECK-NEXT: Mutable: true
# CHECK-NEXT: InitExpr:
# CHECK-NEXT: Opcode: I32_CONST
# CHECK-NEXT: Value: 66592
# __tls_base
# CHECK-NEXT: - Index: 1
# CHECK-NEXT: Type: I32
# CHECK-NEXT: Mutable: true
# CHECK-NEXT: InitExpr:
# CHECK-NEXT: Opcode: I32_CONST
# CHECK-NEXT: Value: 0
# __tls_size
# CHECK-NEXT: - Index: 2
# CHECK-NEXT: Type: I32
# CHECK-NEXT: Mutable: false
# CHECK-NEXT: InitExpr:
# CHECK-NEXT: Opcode: I32_CONST
# CHECK-NEXT: Value: 12
# __tls_align
# CHECK-NEXT: - Index: 3
# CHECK-NEXT: Type: I32
# CHECK-NEXT: Mutable: false
# CHECK-NEXT: InitExpr:
# CHECK-NEXT: Opcode: I32_CONST
# CHECK-NEXT: Value: 4
# ASM-LABEL: <__wasm_init_tls>:
# ASM-EMPTY:
# ASM-NEXT: local.get 0
# ASM-NEXT: global.set 1
# ASM-NEXT: local.get 0
# ASM-NEXT: i32.const 0
# ASM-NEXT: i32.const 12
# ASM-NEXT: memory.init 0, 0
# call to __wasm_apply_global_tls_relocs
# ASM-NEXT: call 3
# ASM-NEXT: end
# ASM-LABEL: <__wasm_apply_global_tls_relocs>:
# ASM-EMPTY:
# ASM-NEXT: global.get 1
# ASM-NEXT: i32.const 0
# ASM-NEXT: i32.add
# ASM-NEXT: global.set 4
# ASM-NEXT: end
# ASM-LABEL: <tls1_addr>:
# ASM-EMPTY:
# ASM-NEXT: global.get 1
# ASM-NEXT: i32.const 0
# ASM-NEXT: i32.add
# ASM-NEXT: end
# ASM-LABEL: <tls2_addr>:
# ASM-EMPTY:
# ASM-NEXT: global.get 1
# ASM-NEXT: i32.const 4
# ASM-NEXT: i32.add
# ASM-NEXT: end
# ASM-LABEL: <tls3_addr>:
# ASM-EMPTY:
# ASM-NEXT: global.get 1
# ASM-NEXT: i32.const 8
# ASM-NEXT: i32.add
# ASM-NEXT: end
# ASM-LABEL: <tls_align>:
# ASM-EMPTY:
# ASM-NEXT: global.get 3
# ASM-NEXT: end
# Also verify TLS usage with --relocatable
# RUN: wasm-ld --relocatable -o %t3.wasm %t.o
# RUN: obj2yaml %t3.wasm | FileCheck %s --check-prefix=RELOC
# RELOC: - Type: IMPORT
# RELOC-NEXT: Imports:
# RELOC-NEXT: - Module: env
# RELOC-NEXT: Field: __tls_base
# RELOC-NEXT: Kind: GLOBAL
# RELOC-NEXT: GlobalType: I32
# RELOC-NEXT: GlobalMutable: true
# RELOC-NEXT: - Module: env
# RELOC-NEXT: Field: __tls_align
# RELOC-NEXT: Kind: GLOBAL
# RELOC-NEXT: GlobalType: I32
# RELOC-NEXT: GlobalMutable: false
# RELOC: GlobalNames:
# RELOC-NEXT: - Index: 0
# RELOC-NEXT: Name: __tls_base
# RELOC-NEXT: - Index: 1
# RELOC-NEXT: Name: __tls_align
# RELOC-NEXT: - Index: 2
# RELOC-NEXT: Name: GOT.data.internal.tls1
# RELOC-NEXT: DataSegmentNames:
# RELOC-NEXT: - Index: 0
# RELOC-NEXT: Name: .tdata
# RELOC-NEXT: - Index: 1
# RELOC-NEXT: Name: .bss.no_tls
Codebase Browser
llvm