| # 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: myfunc_resolver: |
| # PDE-NEXT: 210000: ret |
| # PDE: main: |
| # PDE-NEXT: 210004: adrp x8, #0 |
| # PDE-NEXT: 210008: add x8, x8, #16 |
| # PDE-NEXT: 21000c: ret |
| # PDE-EMPTY: |
| # PDE-NEXT: Disassembly of section .plt: |
| # PDE-EMPTY: |
| # PDE-NEXT: myfunc: |
| ## page(.got.plt) - page(0x210010) = 65536 |
| # PDE-NEXT: 210010: adrp x16, #65536 |
| # PDE-NEXT: 210014: ldr x17, [x16] |
| # PDE-NEXT: 210018: add x16, x16, #0 |
| # PDE-NEXT: 21001c: br x17 |
| |
| ## The adrp to myfunc should generate a PLT entry and a GOT entry with an |
| ## irelative relocation. |
| # PDE-RELOC: .rela.plt { |
| # PDE-RELOC-NEXT: 0x220000 R_AARCH64_IRELATIVE - 0x210000 |
| # PDE-RELOC-NEXT: } |
| |
| # PIE: myfunc_resolver: |
| # PIE-NEXT: 10000: ret |
| # PIE: main: |
| # PIE-NEXT: 10004: adrp x8, #0 |
| # PIE-NEXT: 10008: add x8, x8, #16 |
| # PIE-NEXT: 1000c: ret |
| # PIE-EMPTY: |
| # PIE-NEXT: Disassembly of section .plt: |
| # PIE-EMPTY: |
| # PIE-NEXT: myfunc: |
| # PIE-NEXT: 10010: adrp x16, #131072 |
| # PIE-NEXT: 10014: ldr x17, [x16] |
| # PIE-NEXT: 10018: add x16, x16, #0 |
| # PIE-NEXT: 1001c: br x17 |
| |
| # PIE-RELOC: .rela.plt { |
| # PIE-RELOC-NEXT: 0x30000 R_AARCH64_IRELATIVE - 0x10000 |
| # PIE-RELOC-NEXT: } |