| // REQUIRES: arm |
| // RUN: llvm-mc -filetype=obj -triple=armv7a-linux-gnueabihf --arm-add-build-attributes %s -o %t.o |
| // RUN: ld.lld --fix-cortex-a8 -verbose %t.o -o %t2 2>&1 | FileCheck %s |
| // RUN: llvm-objdump -d --no-show-raw-insn --start-address=0x21ffa --stop-address=0x22008 %t2 | FileCheck --check-prefix=CHECK-PATCH %s |
| |
| /// Test that the patch can work on an unrelocated BLX. Neither clang or GCC |
| /// will emit these without a relocation, but they could be produced by ELF |
| /// processing tools. |
| |
| // CHECK: ld.lld: detected cortex-a8-657419 erratum sequence starting at 21FFE in unpatched output. |
| |
| .syntax unified |
| .text |
| |
| .type _start, %function |
| .balign 4096 |
| .global _start |
| .arm |
| _start: |
| bx lr |
| .space 4086 |
| .thumb |
| /// 32-bit Branch link and exchange spans 2 4KiB regions, preceded by a |
| /// 32-bit non branch instruction. Expect a patch. |
| nop.w |
| /// Encoding for blx _start. Use .inst.n directives to avoid a relocation. |
| .inst.n 0xf7ff |
| .inst.n 0xe800 |
| |
| // CHECK-PATCH: 21ffa: nop.w |
| // CHECK-PATCH-NEXT: 21ffe: blx 0x22004 <__CortexA8657417_21FFE> |
| // CHECK-PATCH: 00022004 <__CortexA8657417_21FFE>: |
| // CHECK-PATCH-NEXT: 22004: b 0x21000 <_start> |
