# REQUIRES: aarch64 # RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux-gnu %s -o %t.o # RUN: ld.lld %t.o -o %t # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s --check-prefix=PDE # RUN: llvm-readobj -r %t | FileCheck %s --check-prefix=PDE-RELOC # RUN: ld.lld -pie %t.o -o %t # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s --check-prefix=PIE # RUN: llvm-readobj -r %t | FileCheck %s --check-prefix=PIE-RELOC ## When compiling with -fno-PIE or -fPIE, if the ifunc is in the same ## translation unit as the address taker, the compiler knows that ifunc is not ## defined in a shared library so it can use a non GOT generating relative reference. .text .globl myfunc .type myfunc,@gnu_indirect_function myfunc: .globl myfunc_resolver .type myfunc_resolver,@function myfunc_resolver: ret .text .globl main .type main,@function main: adrp x8, myfunc add x8, x8, :lo12: myfunc ret ## The address of myfunc is the address of the PLT entry for myfunc. # PDE: : # PDE-NEXT: 210170: ret # PDE:
: # PDE-NEXT: 210174: adrp x8, #0 # PDE-NEXT: 210178: add x8, x8, #384 # PDE-NEXT: 21017c: ret # PDE-EMPTY: # PDE-NEXT: Disassembly of section .iplt: # PDE-EMPTY: # PDE-NEXT: : ## page(.got.plt) - page(0x210010) = 65536 # PDE-NEXT: 210180: adrp x16, #65536 # PDE-NEXT: 210184: ldr x17, [x16, #400] # PDE-NEXT: 210188: add x16, x16, #400 # PDE-NEXT: 21018c: br x17 ## The adrp to myfunc should generate a PLT entry and a GOT entry with an ## irelative relocation. # PDE-RELOC: .rela.dyn { # PDE-RELOC-NEXT: 0x220190 R_AARCH64_IRELATIVE - 0x210170 # PDE-RELOC-NEXT: } # PIE: : # PIE-NEXT: 10260: ret # PIE:
: # PIE-NEXT: 10264: adrp x8, #0 # PIE-NEXT: 10268: add x8, x8, #624 # PIE-NEXT: 1026c: ret # PIE-EMPTY: # PIE-NEXT: Disassembly of section .iplt: # PIE-EMPTY: # PIE-NEXT: : # PIE-NEXT: 10270: adrp x16, #131072 # PIE-NEXT: 10274: ldr x17, [x16, #896] # PIE-NEXT: 10278: add x16, x16, #896 # PIE-NEXT: 1027c: br x17 # PIE-RELOC: .rela.dyn { # PIE-RELOC-NEXT: 0x30380 R_AARCH64_IRELATIVE - 0x10260 # PIE-RELOC-NEXT: }