7c74ce3c68
Fix PR49897: if `__real_foo` has the isUsedInRegularObj bit set, we need to retain `foo` in .symtab, even if `foo` is undefined. The new behavior will match GNU ld. Before the patch, we produced an R_X86_64_JUMP_SLOT relocation referencing the index 0 undefined symbol, which would be erroed by glibc (see f96ff3c0f8ebd941b3f6b345164c3d858b781484). While here, fix another bug: if `__wrap_foo` does not exist, its initial binding should be `foo`'s.
42 lines
1.1 KiB
ArmAsm
42 lines
1.1 KiB
ArmAsm
# REQUIRES: x86
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# RUN: split-file %s %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/a.s -o %t/a.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/def.s -o %t/def.o
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# RUN: ld.lld %t/def.o -o %t/def.so -shared --soname=def
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# RUN: ld.lld %t/a.o %t/def.so -o %t1 --wrap foo
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# RUN: llvm-readelf --dyn-syms %t1 | FileCheck %s
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# Test that the dynamic relocation uses foo. We used to produce a
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# relocation with __real_foo.
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# CHECK: Symbol table '.dynsym' contains 2 entries:
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# CHECK: NOTYPE LOCAL DEFAULT UND
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# CHECK-NEXT: NOTYPE GLOBAL DEFAULT UND foo
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/b.s -o %t/b.o
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# RUN: ld.lld -shared --wrap foo %t/b.o -o %t2.so
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# RUN: llvm-readelf --dyn-syms %t2.so | FileCheck %s --check-prefix=SYM2
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# SYM2: Symbol table '.dynsym' contains 4 entries:
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# SYM2: NOTYPE LOCAL DEFAULT UND
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# SYM2-NEXT: NOTYPE WEAK DEFAULT UND foo
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# SYM2-NEXT: NOTYPE WEAK DEFAULT UND __wrap_foo
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# SYM2-NEXT: NOTYPE GLOBAL DEFAULT [[#]] _start
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#--- a.s
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.global _start
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_start:
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callq __real_foo@plt
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#--- def.s
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.globl foo
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foo:
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#--- b.s
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.weak foo
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.weak __real_foo
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.global _start
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_start:
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call __real_foo@plt
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call foo@plt
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