Index: llvm/test/tools/llvm-objcopy/ELF/basic-only-section.test
===================================================================
--- llvm/test/tools/llvm-objcopy/ELF/basic-only-section.test
+++ llvm/test/tools/llvm-objcopy/ELF/basic-only-section.test
@@ -1,5 +1,5 @@
 # RUN: yaml2obj %s > %t
-# RUN: llvm-objcopy -only-keep=.test %t %t2
+# RUN: llvm-objcopy -only-section=.test %t %t2
 # RUN: llvm-objcopy -j .test %t %t3
 # RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
 # RUN: diff %t2 %t3
Index: llvm/test/tools/llvm-objcopy/ELF/dump-section.test
===================================================================
--- llvm/test/tools/llvm-objcopy/ELF/dump-section.test
+++ llvm/test/tools/llvm-objcopy/ELF/dump-section.test
@@ -1,6 +1,6 @@
 # RUN: yaml2obj %s > %t
 # RUN: llvm-objcopy -O binary -j .text %t %t2
-# RUN: llvm-objcopy -O binary -only-keep .text %t %t3
+# RUN: llvm-objcopy -O binary -only-section .text %t %t3
 # RUN: llvm-objcopy --dump-section .text=%t4 %t %t5
 # RUN: llvm-objcopy --dump-section .foo=%t6 %t %t7
 # RUN: not llvm-objcopy --dump-section .bar=%t8 %t %t9 2>&1 | FileCheck %s --check-prefix=NOBITS
Index: llvm/test/tools/llvm-objcopy/ELF/explicit-only-section-remove.test
===================================================================
--- llvm/test/tools/llvm-objcopy/ELF/explicit-only-section-remove.test
+++ llvm/test/tools/llvm-objcopy/ELF/explicit-only-section-remove.test
@@ -1,5 +1,5 @@
 # RUN: yaml2obj %s > %t
-# RUN: llvm-objcopy -R=.test -only-keep=.test %t %t2
+# RUN: llvm-objcopy -R=.test -only-section=.test %t %t2
 # RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
 
 !ELF
Index: llvm/test/tools/llvm-objcopy/ELF/keep-only-section.test
===================================================================
--- llvm/test/tools/llvm-objcopy/ELF/keep-only-section.test
+++ llvm/test/tools/llvm-objcopy/ELF/keep-only-section.test
@@ -1,5 +1,5 @@
 # RUN: yaml2obj %s > %t
-# RUN: llvm-objcopy -keep-section=.test2 -only-keep=.test %t %t2
+# RUN: llvm-objcopy -keep-section=.test2 -only-section=.test %t %t2
 # RUN: llvm-objcopy -j .test -keep-section=.test2 %t %t3
 # RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
 # RUN: diff %t2 %t3
Index: llvm/test/tools/llvm-objcopy/ELF/only-section-remove-strtab.test
===================================================================
--- llvm/test/tools/llvm-objcopy/ELF/only-section-remove-strtab.test
+++ llvm/test/tools/llvm-objcopy/ELF/only-section-remove-strtab.test
@@ -1,5 +1,5 @@
 # RUN: yaml2obj %s > %t
-# RUN: llvm-objcopy -R .symtab -R .strtab -only-keep=.test %t %t2
+# RUN: llvm-objcopy -R .symtab -R .strtab -only-section=.test %t %t2
 # RUN: llvm-objcopy -j .test -R .strtab -R .symtab %t %t3
 # RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
 # RUN: diff %t2 %t3
Index: llvm/test/tools/llvm-objcopy/ELF/only-section-strip-non-alloc.test
===================================================================
--- llvm/test/tools/llvm-objcopy/ELF/only-section-strip-non-alloc.test
+++ llvm/test/tools/llvm-objcopy/ELF/only-section-strip-non-alloc.test
@@ -1,5 +1,5 @@
 # RUN: yaml2obj %s > %t
-# RUN: llvm-objcopy -strip-non-alloc -only-keep=.test %t %t2
+# RUN: llvm-objcopy -strip-non-alloc -only-section=.test %t %t2
 # RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
 
 !ELF
Index: llvm/test/tools/llvm-objcopy/ELF/strip-sections-only-section.test
===================================================================
--- llvm/test/tools/llvm-objcopy/ELF/strip-sections-only-section.test
+++ llvm/test/tools/llvm-objcopy/ELF/strip-sections-only-section.test
@@ -1,5 +1,5 @@
 # RUN: yaml2obj %s > %t
-# RUN: llvm-objcopy -strip-sections -only-keep=.test %t %t2
+# RUN: llvm-objcopy -strip-sections -only-section=.test %t %t2
 # RUN: od -Ax -t x1 %t2 | FileCheck %s
 # RUN: od -Ax -t c  %t2 | FileCheck %s -check-prefix=TEXT
 
Index: llvm/tools/llvm-objcopy/CopyConfig.h
===================================================================
--- llvm/tools/llvm-objcopy/CopyConfig.h
+++ llvm/tools/llvm-objcopy/CopyConfig.h
@@ -61,7 +61,7 @@
   std::vector<StringRef> AddSection;
   std::vector<StringRef> DumpSection;
   std::vector<StringRef> KeepSection;
-  std::vector<StringRef> OnlyKeep;
+  std::vector<StringRef> OnlySection;
   std::vector<StringRef> SymbolsToGlobalize;
   std::vector<StringRef> SymbolsToKeep;
   std::vector<StringRef> SymbolsToLocalize;
Index: llvm/tools/llvm-objcopy/CopyConfig.cpp
===================================================================
--- llvm/tools/llvm-objcopy/CopyConfig.cpp
+++ llvm/tools/llvm-objcopy/CopyConfig.cpp
@@ -315,8 +315,8 @@
     Config.ToRemove.push_back(Arg->getValue());
   for (auto Arg : InputArgs.filtered(OBJCOPY_keep_section))
     Config.KeepSection.push_back(Arg->getValue());
-  for (auto Arg : InputArgs.filtered(OBJCOPY_only_keep))
-    Config.OnlyKeep.push_back(Arg->getValue());
+  for (auto Arg : InputArgs.filtered(OBJCOPY_only_section))
+    Config.OnlySection.push_back(Arg->getValue());
   for (auto Arg : InputArgs.filtered(OBJCOPY_add_section))
     Config.AddSection.push_back(Arg->getValue());
   for (auto Arg : InputArgs.filtered(OBJCOPY_dump_section))
Index: llvm/tools/llvm-objcopy/ELF/ELFObjcopy.cpp
===================================================================
--- llvm/tools/llvm-objcopy/ELF/ELFObjcopy.cpp
+++ llvm/tools/llvm-objcopy/ELF/ELFObjcopy.cpp
@@ -415,10 +415,10 @@
     };
 
   // Explicit copies:
-  if (!Config.OnlyKeep.empty()) {
+  if (!Config.OnlySection.empty()) {
     RemovePred = [&Config, RemovePred, &Obj](const SectionBase &Sec) {
       // Explicitly keep these sections regardless of previous removes.
-      if (is_contained(Config.OnlyKeep, Sec.Name))
+      if (is_contained(Config.OnlySection, Sec.Name))
         return false;
 
       // Allow all implicit removes.
Index: llvm/tools/llvm-objcopy/ObjcopyOpts.td
===================================================================
--- llvm/tools/llvm-objcopy/ObjcopyOpts.td
+++ llvm/tools/llvm-objcopy/ObjcopyOpts.td
@@ -78,9 +78,9 @@
       MetaVarName<"old=new">;
 defm keep_section : Eq<"keep-section", "Keep <section>">,
                     MetaVarName<"section">;
-defm only_keep : Eq<"only-keep", "Remove all but <section>">,
-                 MetaVarName<"section">;
-def j : JoinedOrSeparate<["-"], "j">, Alias<only_keep>;
+defm only_section : Eq<"only-section", "Remove all but <section>">,
+                    MetaVarName<"section">;
+def j : JoinedOrSeparate<["-"], "j">, Alias<only_section>;
 defm add_section
     : Eq<"add-section",
          "Make a section named <section> with the contents of <file>.">,