| # REQUIRES: x86 |
| |
| # RUN: rm -rf %t && split-file %s %t |
| # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/main.s -o %t/main.o |
| # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/wrap.s -o %t/wrap.o |
| # RUN: ld.lld -shared --soname=fixed %t/wrap.o -o %t/wrap.so |
| |
| ## GNU ld does not wrap a defined symbol in an object file |
| ## https://sourceware.org/bugzilla/show_bug.cgi?id=26358 |
| ## We choose to wrap defined symbols so that LTO, non-LTO and relocatable links |
| ## behave the same. The 'call bar' in main.o will reference __wrap_bar. We cannot |
| ## easily distinguish the case from cases where bar is not referenced, so we |
| ## export __wrap_bar whenever bar is defined, regardless of whether it is indeed |
| ## referenced. |
| |
| # RUN: ld.lld -shared %t/main.o --wrap bar -o %t1.so |
| # RUN: llvm-objdump -d %t1.so | FileCheck %s |
| # RUN: ld.lld %t/main.o %t/wrap.so --wrap bar -o %t1 |
| # RUN: llvm-objdump -d %t1 | FileCheck %s |
| |
| # CHECK: <_start>: |
| # CHECK-NEXT: callq {{.*}} <__wrap_bar@plt> |
| |
| #--- main.s |
| .globl _start, bar |
| _start: |
| call bar |
| bar: |
| |
| #--- wrap.s |
| .globl __wrap_bar |
| __wrap_bar: |
| retq |