335ac4108d
The current message implies a command line flag caused an undefined reference. This of course is wrong and causes confusion. The message now more accurately reflects the true state of affairs.
81 lines
2.9 KiB
ArmAsm
81 lines
2.9 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/call-foo.s -o %t/call-foo.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/bar.s -o %t/bar.o
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# RUN: ld.lld -shared -soname=t.so %t/bar.o -o %t/bar.so
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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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## foo is defined, then referenced in another object file.
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# RUN: ld.lld -shared %t/main.o %t/call-foo.o --wrap foo -o %t1.so
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# RUN: llvm-readelf -r %t1.so | FileCheck %s --check-prefix=CHECK1
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# CHECK1: R_X86_64_JUMP_SLOT 0000000000000000 bar + 0
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# CHECK1-NEXT: R_X86_64_JUMP_SLOT 0000000000000000 __wrap_foo + 0
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## --no-allow-shlib-undefined errors because __real_foo is not defined.
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# RUN: not ld.lld %t/main.o %t/bar.so -o /dev/null 2>&1 | FileCheck --check-prefix=ERR %s
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# ERR: error: undefined reference: __real_foo
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## --wrap=foo defines __real_foo.
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# RUN: ld.lld %t/main.o %t/bar.so --wrap=foo -o %t2
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# RUN: llvm-readelf --dyn-syms %t2 | FileCheck %s --check-prefix=CHECK2
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## See wrap-plt2.s why __wrap_foo is retained.
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# CHECK2: Symbol table '.dynsym' contains 3 entries:
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# CHECK2: NOTYPE LOCAL DEFAULT UND
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# CHECK2-NEXT: NOTYPE GLOBAL DEFAULT UND bar
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# CHECK2-NEXT: NOTYPE GLOBAL DEFAULT UND __wrap_foo
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## __wrap_bar is undefined.
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# RUN: ld.lld -shared %t/main.o --wrap=bar -o %t3.so
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# RUN: llvm-readelf -r --dyn-syms %t3.so | FileCheck %s --check-prefix=CHECK3
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# CHECK3: R_X86_64_JUMP_SLOT 0000000000000000 __wrap_bar + 0
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# CHECK3: Symbol table '.dynsym' contains 4 entries:
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# CHECK3: NOTYPE LOCAL DEFAULT UND
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# CHECK3-NEXT: NOTYPE GLOBAL DEFAULT UND __wrap_bar
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# CHECK3-NEXT: NOTYPE GLOBAL DEFAULT 6 _start
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# CHECK3-NEXT: NOTYPE GLOBAL DEFAULT 6 foo
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## __wrap_bar is defined in %t/wrap.so.
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# RUN: ld.lld -shared %t/main.o %t/wrap.so --wrap=bar -o %t4.so
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# RUN: llvm-readelf -r --dyn-syms %t4.so | FileCheck %s --check-prefix=CHECK4
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# CHECK4: R_X86_64_JUMP_SLOT {{.*}} __wrap_bar + 0
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# CHECK4: Symbol table '.dynsym' contains 4 entries:
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# CHECK4: NOTYPE LOCAL DEFAULT UND
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# CHECK4-NEXT: NOTYPE GLOBAL DEFAULT UND __wrap_bar
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# CHECK4-NEXT: NOTYPE GLOBAL DEFAULT 6 _start
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# CHECK4-NEXT: NOTYPE GLOBAL DEFAULT 6 foo
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# RUN: ld.lld %t/main.o %t/wrap.so --wrap bar -o %t1
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# RUN: llvm-readelf --dyn-syms %t1 | FileCheck %s --check-prefix=DYNSYM
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# RUN: llvm-objdump -d %t1 | FileCheck %s --check-prefix=ASM
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# DYNSYM: Symbol table '.dynsym' contains 2 entries:
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# DYNSYM: NOTYPE LOCAL DEFAULT UND
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# DYNSYM-NEXT: NOTYPE GLOBAL DEFAULT UND __wrap_bar
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# ASM: <_start>:
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# ASM-NEXT: callq {{.*}} <__wrap_bar@plt>
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#--- main.s
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.globl _start, foo
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_start:
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call bar
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foo:
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#--- call-foo.s
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call foo
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#--- bar.s
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.globl bar
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bar:
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call __real_foo
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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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