derek.holloway
7502bf64a4
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34 lines
1.0 KiB
ArmAsm
34 lines
1.0 KiB
ArmAsm
# REQUIRES: x86
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# RUN: rm -rf %t && split-file %s %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/main.s -o %t/main.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/wrap.s -o %t/wrap.o
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# RUN: ld.lld -shared --soname=fixed %t/wrap.o -o %t/wrap.so
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## GNU ld does not wrap a defined symbol in an object file
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## https://sourceware.org/bugzilla/show_bug.cgi?id=26358
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## We choose to wrap defined symbols so that LTO, non-LTO and relocatable links
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## behave the same. The 'call bar' in main.o will reference __wrap_bar. We cannot
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## easily distinguish the case from cases where bar is not referenced, so we
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## export __wrap_bar whenever bar is defined, regardless of whether it is indeed
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## referenced.
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# RUN: ld.lld -shared %t/main.o --wrap bar -o %t1.so
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# RUN: llvm-objdump -d %t1.so | FileCheck %s
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# RUN: ld.lld %t/main.o %t/wrap.so --wrap bar -o %t1
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# RUN: llvm-objdump -d %t1 | FileCheck %s
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# CHECK: <_start>:
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# CHECK-NEXT: callq {{.*}} <__wrap_bar@plt>
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#--- main.s
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.globl _start, bar
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_start:
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call bar
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bar:
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#--- wrap.s
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.globl __wrap_bar
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__wrap_bar:
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retq
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