derek.holloway
7502bf64a4
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54 lines
1.7 KiB
ArmAsm
54 lines
1.7 KiB
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
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# RUN: ld.lld -shared %t.o -o %t.so
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# RUN: llvm-readobj -r %t.so | FileCheck --check-prefix=LD-REL %s
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# RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t.so | FileCheck --check-prefix=LD %s
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# RUN: ld.lld %t.o -o %t
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# RUN: llvm-readelf -r %t | FileCheck --check-prefix=NOREL %s
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# RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck --check-prefix=LE %s
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## Check _TLS_MODULE_BASE_ used by LD produces a dynamic relocation with a value of 0.
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# LD-REL: .rela.dyn {
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# LD-REL-NEXT: 0x2318 R_X86_64_TLSDESC - 0x0
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# LD-REL-NEXT: }
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## 0x2318-0x1267 = 4273
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## dtpoff(a) = 8, dtpoff(b) = 12
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# LD: leaq 4273(%rip), %rax
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# LD-NEXT: 1267: callq *(%rax)
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# LD-NEXT: movl %fs:8(%rax), %edx
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# LD-NEXT: addl %fs:12(%rax), %edx
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## When producing an executable, the LD code sequence can be relaxed to LE.
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## It is the same as GD->LE.
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## tpoff(_TLS_MODULE_BASE_) = 0, tpoff(a) = -8, tpoff(b) = -4
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# NOREL: no relocations
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# LE: movq $0, %rax
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# LE-NEXT: nop
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# LE-NEXT: movl %fs:-8(%rax), %edx
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# LE-NEXT: addl %fs:-4(%rax), %edx
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# RUN: ld.lld -r %t.o -o %t.ro
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# RUN: llvm-readelf -s %t.ro | FileCheck --check-prefix=RELOCATABLE %s
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# RUN: ld.lld %t.ro -o %t
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# RUN: llvm-readelf -r %t | FileCheck --check-prefix=NOREL %s
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# RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck --check-prefix=LE %s
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# RELOCATABLE: 0000000000000000 0 TLS GLOBAL DEFAULT UND _TLS_MODULE_BASE_
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leaq _TLS_MODULE_BASE_@tlsdesc(%rip), %rax
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call *_TLS_MODULE_BASE_@tlscall(%rax)
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movl %fs:a@dtpoff(%rax), %edx
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addl %fs:b@dtpoff(%rax), %edx
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.section .tbss
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.zero 8
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a:
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.zero 4
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b:
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.zero 4
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