| // REQUIRES: arm |
| // RUN: llvm-mc -filetype=obj --arm-add-build-attributes -triple=armv7a-none-linux-gnueabi %s -o %t |
| // RUN: ld.lld %t --no-merge-exidx-entries -o %t2 |
| // RUN: llvm-objdump -s %t2 | FileCheck --check-prefix CHECK-DUPS %s |
| // RUN: ld.lld %t -o %t3 |
| // RUN: llvm-objdump -s %t3 | FileCheck %s |
| |
| /// Test that lld can at least remove duplicate .ARM.exidx sections. A more |
| /// fine grained implementation will be able to remove duplicate entries within |
| /// a .ARM.exidx section. |
| |
| /// With duplicate entries |
| // CHECK-DUPS: Contents of section .ARM.exidx: |
| // CHECK-DUPS-NEXT: 100d4 78000100 01000000 74000100 01000000 |
| // CHECK-DUPS-NEXT: 100e4 70000100 01000000 6c000100 01000000 |
| // CHECK-DUPS-NEXT: 100f4 68000100 08849780 64000100 08849780 |
| // CHECK-DUPS-NEXT: 10104 60000100 08849780 5c000100 24000000 |
| // CHECK-DUPS-NEXT: 10114 58000100 28000000 54000100 01000000 |
| // CHECK-DUPS-NEXT: 10124 50000100 01000000 4c000100 01000000 |
| // CHECK-DUPS-NEXT: Contents of section .ARM.extab: |
| |
| /// After duplicate entry removal |
| // CHECK: Contents of section .ARM.exidx: |
| // CHECK-NEXT: 100d4 48000100 01000000 50000100 08849780 |
| // CHECK-NEXT: 100e4 54000100 1c000000 50000100 20000000 |
| // CHECK-NEXT: 100f4 4c000100 01000000 4c000100 01000000 |
| // CHECK-NEXT: Contents of section .ARM.extab: |
| .syntax unified |
| |
| /// Expect 1 EXIDX_CANTUNWIND entry. |
| .section .text.00, "ax", %progbits |
| .globl _start |
| _start: |
| .fnstart |
| bx lr |
| .cantunwind |
| .fnend |
| |
| /// Expect .ARM.exidx.text.01 to be identical to .ARM.exidx.text.00 |
| .section .text.01, "ax", %progbits |
| .globl f1 |
| f1: |
| .fnstart |
| bx lr |
| .cantunwind |
| .fnend |
| |
| /// Expect 2 EXIDX_CANTUNWIND entries, these can be duplicated into |
| /// .ARM.exid.text.00 |
| .section .text.02, "ax", %progbits |
| .globl f2 |
| f2: |
| .fnstart |
| bx lr |
| .cantunwind |
| .fnend |
| |
| .globl f3 |
| f3: |
| .fnstart |
| bx lr |
| .cantunwind |
| .fnend |
| |
| /// Expect inline unwind instructions, not a duplicate of previous entry. |
| .section .text.03, "ax", %progbits |
| .global f4 |
| f4: |
| .fnstart |
| bx lr |
| .save {r7, lr} |
| .setfp r7, sp, #0 |
| .fnend |
| |
| /// Expect 2 inline unwind entries that are a duplicate of |
| /// .ARM.exidx.text.03 |
| .section .text.04, "ax", %progbits |
| .global f5 |
| f5: |
| .fnstart |
| bx lr |
| .save {r7, lr} |
| .setfp r7, sp, #0 |
| .fnend |
| |
| .global f6 |
| f6: |
| .fnstart |
| bx lr |
| .save {r7, lr} |
| .setfp r7, sp, #0 |
| .fnend |
| |
| /// Expect a section with a reference to an .ARM.extab. Not a duplicate |
| /// of previous inline table entry. |
| .section .text.05, "ax",%progbits |
| .global f7 |
| f7: |
| .fnstart |
| bx lr |
| .personality __gxx_personality_v0 |
| .handlerdata |
| .long 0 |
| .fnend |
| |
| /// Expect a reference to an identical .ARM.extab. We do not try to |
| /// deduplicate references to .ARM.extab sections. |
| .section .text.06, "ax",%progbits |
| .global f8 |
| f8: |
| .fnstart |
| bx lr |
| .personality __gxx_personality_v0 |
| .handlerdata |
| .long 0 |
| .fnend |
| |
| /// Dummy implementation of personality routines to satisfy reference from |
| /// exception tables |
| /// Expect Linker generated EXIDX_CANTUNWIND tables |
| .section .text.__gcc_personality_v0, "ax", %progbits |
| .global __gxx_personality_v0 |
| __gxx_personality_v0: |
| bx lr |
| |
| .section .text.__aeabi_unwind_cpp_pr0, "ax", %progbits |
| .global __aeabi_unwind_cpp_pr0 |
| __aeabi_unwind_cpp_pr0: |
| bx lr |
