diff --git a/lld/test/ELF/aarch64-thunk-script.s b/lld/test/ELF/aarch64-thunk-script.s --- a/lld/test/ELF/aarch64-thunk-script.s +++ b/lld/test/ELF/aarch64-thunk-script.s @@ -6,7 +6,7 @@ // RUN: } " > %t.script // RUN: ld.lld --script %t.script %t.o -o %t // RUN: llvm-objdump -d --no-show-raw-insn --print-imm-hex %t | FileCheck %s -// RUN: llvm-nm --no-sort %t | FileCheck --check-prefix=NM %s +// RUN: llvm-nm --no-sort --special-syms %t | FileCheck --check-prefix=NM %s // Check that we have the out of branch range calculation right. The immediate // field is signed so we have a slightly higher negative displacement. diff --git a/llvm/test/MC/AArch64/mapping-within-section.s b/llvm/test/MC/AArch64/mapping-within-section.s --- a/llvm/test/MC/AArch64/mapping-within-section.s +++ b/llvm/test/MC/AArch64/mapping-within-section.s @@ -1,4 +1,4 @@ -// RUN: llvm-mc -triple=aarch64-none-linux-gnu -filetype=obj %s | llvm-nm - | FileCheck %s +// RUN: llvm-mc -triple=aarch64-none-linux-gnu -filetype=obj %s | llvm-nm --special-syms - | FileCheck %s .text // $x at 0x0000 diff --git a/llvm/test/tools/llvm-nm/AArch64/special-syms.test b/llvm/test/tools/llvm-nm/AArch64/special-syms.test --- a/llvm/test/tools/llvm-nm/AArch64/special-syms.test +++ b/llvm/test/tools/llvm-nm/AArch64/special-syms.test @@ -1,10 +1,7 @@ # RUN: yaml2obj %s -o %t -# Test --special-syms flag. Currently this flag is a no-op, so outputs with and without -# this flag should be identical. GNU nm doesn't show ARM and AArch64 special symbols -# without --special-syms, so this test is to be changed when/if we decide to implement -# GNU nm-like behavior in llvm-nm +# Test --special-syms flag. -# RUN: llvm-nm %t | FileCheck %s +# RUN: llvm-nm %t | count 0 # RUN: llvm-nm %t --special-syms | FileCheck %s !ELF diff --git a/llvm/test/tools/llvm-nm/debug-syms.test b/llvm/test/tools/llvm-nm/debug-syms.test --- a/llvm/test/tools/llvm-nm/debug-syms.test +++ b/llvm/test/tools/llvm-nm/debug-syms.test @@ -1,6 +1,6 @@ # RUN: yaml2obj %s -o %t.o -# RUN: llvm-nm --debug-syms %t.o | FileCheck %s --implicit-check-not {{.}} --check-prefix SYMBOL -# RUN: llvm-nm -a %t.o | FileCheck %s --implicit-check-not {{.}} --check-prefix SYMBOL +# RUN: llvm-nm --special-syms --debug-syms %t.o | FileCheck %s --implicit-check-not {{.}} --check-prefix SYMBOL +# RUN: llvm-nm --special-syms -a %t.o | FileCheck %s --implicit-check-not {{.}} --check-prefix SYMBOL # SYMBOL: 0000000000000000 n $a # SYMBOL-NEXT: 0000000000000000 n $d diff --git a/llvm/tools/llvm-nm/llvm-nm.cpp b/llvm/tools/llvm-nm/llvm-nm.cpp --- a/llvm/tools/llvm-nm/llvm-nm.cpp +++ b/llvm/tools/llvm-nm/llvm-nm.cpp @@ -182,8 +182,10 @@ cl::alias JustSymbolNames("j", cl::desc("Alias for --just-symbol-name"), cl::aliasopt(JustSymbolName), cl::Grouping); -cl::opt SpecialSyms("special-syms", - cl::desc("No-op. Used for GNU compatibility only")); +cl::opt + SpecialSyms("special-syms", + cl::desc("Do not filter special symbols from the output"), + cl::cat(NMCat)); cl::list SegSect("s", cl::multi_val(2), cl::ZeroOrMore, cl::value_desc("segment section"), cl::Hidden, @@ -733,6 +735,16 @@ } } +static bool isSpecialSym(SymbolicFile &Obj, StringRef Name) { + auto *ELFObj = dyn_cast(&Obj); + if (!ELFObj) + return false; + uint16_t EMachine = ELFObj->getEMachine(); + if (EMachine != ELF::EM_ARM && EMachine != ELF::EM_AARCH64) + return false; + return Name[0] == '$'; +} + static void sortAndPrintSymbolList(SymbolicFile &Obj, bool printName, StringRef ArchiveName, StringRef ArchitectureName) { @@ -822,7 +834,8 @@ bool Global = SymFlags & SymbolRef::SF_Global; bool Weak = SymFlags & SymbolRef::SF_Weak; if ((!Undefined && UndefinedOnly) || (Undefined && DefinedOnly) || - (!Global && ExternalOnly) || (Weak && NoWeakSymbols)) + (!Global && ExternalOnly) || (Weak && NoWeakSymbols) || + (!SpecialSyms && isSpecialSym(Obj, Name))) continue; if (PrintFileName) writeFileName(outs(), ArchiveName, ArchitectureName);