derek.holloway
7502bf64a4
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79 lines
2.6 KiB
ArmAsm
79 lines
2.6 KiB
ArmAsm
# REQUIRES: aarch64
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# RUN: llvm-mc -filetype=obj -triple=aarch64 %s -o %t.o
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# RUN: ld.lld --no-relax %t.o -o %t
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# RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck %s --check-prefix=PDE
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# RUN: llvm-readobj -r %t | FileCheck %s --check-prefix=PDE-RELOC
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# RUN: ld.lld -pie --no-relax %t.o -o %t
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# RUN: ld.lld -pie --no-relax --apply-dynamic-relocs %t.o -o %t.apply
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# RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck %s --check-prefix=PIE
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# RUN: llvm-readobj -r -x .got.plt %t | FileCheck %s --check-prefixes=PIE-RELOC,NO-APPLY
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# RUN: llvm-readobj -r -x .got.plt %t.apply | FileCheck %s --check-prefixes=PIE-RELOC,APPLY
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## When compiling with -fno-PIE or -fPIE, if the ifunc is in the same
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## translation unit as the address taker, the compiler knows that ifunc is not
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## defined in a shared library so it can use a non GOT generating relative reference.
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.text
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.globl myfunc
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.type myfunc,@gnu_indirect_function
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myfunc:
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.globl myfunc_resolver
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.type myfunc_resolver,@function
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myfunc_resolver:
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ret
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.text
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.globl main
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.type main,@function
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main:
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adrp x8, myfunc
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add x8, x8, :lo12: myfunc
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ret
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## The address of myfunc is the address of the PLT entry for myfunc.
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# PDE: <myfunc_resolver>:
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# PDE-NEXT: 210170: ret
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# PDE: <main>:
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# PDE-NEXT: 210174: adrp x8, 0x210000
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# PDE-NEXT: 210178: add x8, x8, #384
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# PDE-NEXT: 21017c: ret
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# PDE-EMPTY:
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# PDE-NEXT: Disassembly of section .iplt:
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# PDE-EMPTY:
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# PDE-NEXT: <myfunc>:
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## page(.got.plt) - page(0x210010) = 65536
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# PDE-NEXT: 210180: adrp x16, 0x220000
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# PDE-NEXT: 210184: ldr x17, [x16, #400]
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# PDE-NEXT: 210188: add x16, x16, #400
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# PDE-NEXT: 21018c: br x17
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## The adrp to myfunc should generate a PLT entry and a GOT entry with an
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## irelative relocation.
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# PDE-RELOC: .rela.dyn {
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# PDE-RELOC-NEXT: 0x220190 R_AARCH64_IRELATIVE - 0x210170
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# PDE-RELOC-NEXT: }
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# PIE: <myfunc_resolver>:
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# PIE-NEXT: 10260: ret
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# PIE: <main>:
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# PIE-NEXT: 10264: adrp x8, 0x10000
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# PIE-NEXT: 10268: add x8, x8, #624
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# PIE-NEXT: 1026c: ret
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# PIE-EMPTY:
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# PIE-NEXT: Disassembly of section .iplt:
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# PIE-EMPTY:
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# PIE-NEXT: <myfunc>:
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# PIE-NEXT: 10270: adrp x16, 0x30000
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# PIE-NEXT: ldr x17, [x16, #832]
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# PIE-NEXT: add x16, x16, #832
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# PIE-NEXT: br x17
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# PIE-RELOC: .rela.dyn {
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# PIE-RELOC-NEXT: 0x30340 R_AARCH64_IRELATIVE - 0x10260
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# PIE-RELOC-NEXT: }
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# PIE-RELOC: Hex dump of section '.got.plt':
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# NO-APPLY: 0x00030340 00000000 00000000
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# APPLY: 0x00030340 60020100 00000000
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# PIE-RELOC-EMPTY:
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