diff options
| -rw-r--r-- | lld/ELF/Driver.cpp | 6 | ||||
| -rw-r--r-- | lld/test/ELF/lto/init-fini.ll | 38 |
2 files changed, 44 insertions, 0 deletions
diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp index 1b1a50bf6d1..616a9d4c4e8 100644 --- a/lld/ELF/Driver.cpp +++ b/lld/ELF/Driver.cpp @@ -1782,6 +1782,12 @@ template <class ELFT> void LinkerDriver::link(opt::InputArgList &args) { for (StringRef pat : args::getStrings(args, OPT_undefined_glob)) handleUndefinedGlob(pat); + // Mark -init and -fini symbols so that the LTO doesn't eliminate them. + if (Symbol *sym = symtab->find(config->init)) + sym->isUsedInRegularObj = true; + if (Symbol *sym = symtab->find(config->fini)) + sym->isUsedInRegularObj = true; + // If any of our inputs are bitcode files, the LTO code generator may create // references to certain library functions that might not be explicit in the // bitcode file's symbol table. If any of those library functions are defined diff --git a/lld/test/ELF/lto/init-fini.ll b/lld/test/ELF/lto/init-fini.ll new file mode 100644 index 00000000000..cf466e5a60f --- /dev/null +++ b/lld/test/ELF/lto/init-fini.ll @@ -0,0 +1,38 @@ +; REQUIRES: x86 +; RUN: llvm-as %s -o %t.o + +;; +;; Verify that symbols given by -init and -fini are preserved and +;; DT_INIT/DT_FINI are created. +;; + +; RUN: ld.lld -o %t.exe -pie %t.o +; RUN: llvm-nm %t.exe | FileCheck -check-prefix=TEST1 --allow-empty %s +; RUN: llvm-readelf -d %t.exe | FileCheck -check-prefix=TEST2 %s + +; TEST1-NOT: foo +; TEST1-NOT: bar + +; TEST2-NOT: INIT +; TEST2-NOT: FINI + +; RUN: ld.lld -o %t.exe -pie -init=foo -fini=bar %t.o +; RUN: llvm-nm %t.exe | FileCheck -check-prefix=TEST3 %s +; RUN: llvm-readelf -d %t.exe | FileCheck -check-prefix=TEST4 %s + +; TEST3: bar +; TEST3: foo + +; TEST4: INIT +; TEST4: FINI + +target triple = "x86_64-unknown-linux-gnu" +target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" + +define void @foo() { + ret void +} + +define void @bar() { + ret void +} |
