[PATCH] D71803: [llvm-nm] Display STT_GNU_IFUNC as 'i'

[Fangrui Song via Phabricator via llvm-commits]

MaskRay updated this revision to Diff 235225.
MaskRay added a comment.

Add llvm_unreachable


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D71803/new/

https://reviews.llvm.org/D71803

Files:
  lld/test/ELF/ppc64-ifunc.s
  llvm/test/LTO/Resolution/X86/ifunc.ll
  llvm/test/tools/llvm-nm/ifunc.test
  llvm/tools/llvm-nm/llvm-nm.cpp


Index: llvm/tools/llvm-nm/llvm-nm.cpp
===================================================================
--- llvm/tools/llvm-nm/llvm-nm.cpp
+++ llvm/tools/llvm-nm/llvm-nm.cpp
@@ -1133,8 +1133,12 @@
     Ret = getSymbolNMTypeChar(*MachO, I);
   else if (WasmObjectFile *Wasm = dyn_cast<WasmObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*Wasm, I);
-  else
-    Ret = getSymbolNMTypeChar(cast<ELFObjectFileBase>(Obj), I);
+  else if (ELFObjectFileBase *ELF = dyn_cast<ELFObjectFileBase>(&Obj)) {
+    if (elf_symbol_iterator(I)->getELFType() == ELF::STT_GNU_IFUNC)
+      return 'i';
+    Ret = getSymbolNMTypeChar(*ELF, I);
+  } else
+    llvm_unreachable("unknown binary format");
 
   if (!(Symflags & object::SymbolRef::SF_Global))
     return Ret;
Index: llvm/test/tools/llvm-nm/ifunc.test
===================================================================
--- /dev/null
+++ llvm/test/tools/llvm-nm/ifunc.test
@@ -0,0 +1,25 @@
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-nm --no-sort %t | FileCheck %s
+
+# CHECK:      i ifunc_local
+# CHECK-NEXT: i ifunc_global
+
+!ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_REL
+  Machine: EM_X86_64
+Sections:
+  - Name:  .text
+    Type:  SHT_PROGBITS
+    Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+Symbols:
+  - Name:    ifunc_local
+    Type:    STT_GNU_IFUNC
+    Binding: STB_LOCAL
+    Section: .text
+  - Name:    ifunc_global
+    Type:    STT_GNU_IFUNC
+    Binding: STB_GLOBAL
+    Section: .text
Index: llvm/test/LTO/Resolution/X86/ifunc.ll
===================================================================
--- llvm/test/LTO/Resolution/X86/ifunc.ll
+++ llvm/test/LTO/Resolution/X86/ifunc.ll
@@ -1,7 +1,7 @@
 ; RUN: opt -module-summary -o %t.bc %s
 ; RUN: llvm-lto2 run %t.bc -r %t.bc,foo,pl -o %t2
 ; RUN: llvm-nm %t2.1 | FileCheck %s
-; CHECK: T foo
+; CHECK: i foo
 ; CHECK: t foo_ifunc
 
 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
Index: lld/test/ELF/ppc64-ifunc.s
===================================================================
--- lld/test/ELF/ppc64-ifunc.s
+++ lld/test/ELF/ppc64-ifunc.s
@@ -15,8 +15,8 @@
 # RUN: llvm-readobj -r %t | FileCheck --check-prefix=REL %s
 
 # NM-DAG: 0000000010028248 d .TOC.
-# NM-DAG: 00000000100101f8 T ifunc
-# NM-DAG: 00000000100101fc T ifunc2
+# NM-DAG: 00000000100101f8 i ifunc
+# NM-DAG: 00000000100101fc i ifunc2
 
 # SECTIONS: .plt NOBITS 0000000010030250 000250 000010 00 WA 0 0 8
 


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