1# REQUIRES: x86 2# RUN: rm -rf %t; split-file %s %t 3 4# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos -o %t/foo.o %t/foo.s 5# RUN: %lld -dylib -o %t/foo.dylib %t/foo.o 6 7# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos -o %t/main.o %t/main.s 8 9# _foo starts out as a (non-weak) dynamically looked up symbol and is merged 10# against the Undefined from foo.o. _bar isn't referenced in any object file, 11# but starts out as Undefined because of the -u flag. _baz isn't referenced 12# at all. 13# RUN: %lld -lSystem %t/main.o -U _foo -U _bar -u _bar -U _baz -o %t/out 14# RUN: llvm-objdump --macho --lazy-bind %t/out | FileCheck --check-prefix=DYNAMIC %s 15# RUN: llvm-nm -m %t/out | FileCheck --check-prefix=DYNAMICSYM %s 16 17# Same thing should happen if _foo starts out as an Undefined. 18# `-U _foo` being passed twice shouldn't have an effect either. 19# RUN: %lld -lSystem %t/main.o -u _foo -U _foo -U _foo -u _bar -U _bar -U _baz -o %t/out 20# RUN: llvm-objdump --macho --lazy-bind %t/out | FileCheck --check-prefix=DYNAMIC %s 21# RUN: llvm-nm -m %t/out | FileCheck --check-prefix=DYNAMICSYM %s 22 23# Unreferenced dynamic lookup symbols don't make it into the bind tables, but 24# they do make it into the symbol table in ld64 if they're an undefined from -u 25# for some reason. lld happens to have the same behavior when no explicit code 26# handles this case, so match ld64's behavior. 27 28# DYNAMIC-NOT: _bar 29# DYNAMIC-NOT: _baz 30# DYNAMIC: flat-namespace _foo 31 32# DYNAMICSYM: (undefined) external _bar (dynamically looked up) 33# DYNAMICSYM-NOT: (undefined) external _bar (dynamically looked up) 34# DYNAMICSYM-NEXT: (undefined) external _foo (dynamically looked up) 35 36# Test with a Defined. Here, foo.o provides _foo and the symbol doesn't need 37# to be imported. 38# RUN: %lld -lSystem %t/main.o %t/foo.o -U _foo -o %t/out 39# RUN: llvm-objdump --macho --lazy-bind %t/out | FileCheck --check-prefix=NOTDYNAMIC %s 40 41# NOTDYNAMIC-NOT: _foo 42 43# Here, foo.dylib provides _foo and the symbol doesn't need to be imported 44# dynamically. 45# RUN: %lld -lSystem %t/main.o %t/foo.dylib -U _foo -o %t/out 46# RUN: llvm-objdump --macho --lazy-bind %t/out | FileCheck --check-prefix=TWOLEVEL %s 47# RUN: llvm-nm -m %t/out | FileCheck --check-prefix=TWOLEVELSYM %s 48 49# TWOLEVEL: foo _foo 50# TWOLEVELSYM: (undefined) external _foo (from foo) 51 52# Test resolving dynamic lookup symbol with weak defined. 53# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos -o %t/weak-foo.o %t/weak-foo.s 54# RUN: %lld -dylib -o %t/weak-foo.dylib %t/weak-foo.o -U _foo 55# RUN: llvm-objdump --macho --bind --lazy-bind --weak-bind %t/weak-foo.dylib | FileCheck --check-prefix=WEAKDEF %s 56# RUN: llvm-nm -m %t/weak-foo.dylib | FileCheck --check-prefix=WEAKDEFSYM %s 57# WEAKDEF-NOT: _foo 58# WEAKDEFSYM: weak external _foo 59 60# Same if foo.dylib provides _foo weakly, except that the symbol is weak then. 61# RUN: %lld -lSystem %t/main.o %t/weak-foo.dylib -U _foo -o %t/out 62# RUN: llvm-objdump --macho --bind --lazy-bind --weak-bind %t/out | FileCheck --check-prefix=TWOLEVELWEAK %s 63# RUN: llvm-nm -m %t/out | FileCheck --check-prefix=TWOLEVELWEAKSYM %s 64 65# TWOLEVELWEAK-LABEL: Bind table: 66# TWOLEVELWEAK: __DATA __la_symbol_ptr 0x[[#%x,ADDR:]] pointer 0 weak-foo _foo 67# TWOLEVELWEAK-LABEL: Lazy bind table: 68# TWOLEVELWEAK-NOT: weak-foo _foo 69# TWOLEVELWEAK-LABEL: Weak bind table: 70# TWOLEVELWEAK: __DATA __la_symbol_ptr 0x[[#ADDR]] pointer 0 _foo 71 72# TWOLEVELWEAKSYM: (undefined) weak external _foo (from weak-foo) 73 74#--- foo.s 75.globl _foo 76_foo: 77 ret 78 79#--- weak-foo.s 80.globl _foo 81.weak_definition _foo 82_foo: 83 ret 84 85#--- main.s 86.globl _main 87_main: 88 callq _foo 89 ret 90