1# REQUIRES: x86 2 3# RUN: rm -rf %t && split-file %s %t 4# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/main.s -o %t/main.o 5# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/wrap.s -o %t/wrap.o 6# RUN: ld.lld -shared --soname=fixed %t/wrap.o -o %t/wrap.so 7 8## GNU ld does not wrap a defined symbol in an object file 9## https://sourceware.org/bugzilla/show_bug.cgi?id=26358 10## We choose to wrap defined symbols so that LTO, non-LTO and relocatable links 11## behave the same. The 'call bar' in main.o will reference __wrap_bar. We cannot 12## easily distinguish the case from cases where bar is not referenced, so we 13## export __wrap_bar whenever bar is defined, regardless of whether it is indeed 14## referenced. 15 16# RUN: ld.lld -shared %t/main.o --wrap bar -o %t1.so 17# RUN: llvm-objdump -d %t1.so | FileCheck %s 18# RUN: ld.lld %t/main.o %t/wrap.so --wrap bar -o %t1 19# RUN: llvm-objdump -d %t1 | FileCheck %s 20 21# CHECK: <_start>: 22# CHECK-NEXT: callq {{.*}} <__wrap_bar@plt> 23 24#--- main.s 25.globl _start, bar 26_start: 27 call bar 28bar: 29 30#--- wrap.s 31.globl __wrap_bar 32__wrap_bar: 33 retq 34