[llvm-objcopy] Add support for removing sections
This change adds support for removing sections using the -R field (as
GNU objcopy does as well). This change should let us add many helpful
tests and is a proper stepping stone for adding more general kinds of
stripping.
Differential Revision: https://reviews.llvm.org/D38260
llvm-svn: 315346
diff --git a/llvm/test/tools/llvm-objcopy/dynsym-error-remove-strtab.test b/llvm/test/tools/llvm-objcopy/dynsym-error-remove-strtab.test
new file mode 100644
index 0000000..ef6ef24
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/dynsym-error-remove-strtab.test
@@ -0,0 +1,3 @@
+# RUN: not llvm-objcopy -R .dynstr %p/Inputs/dynsym.so %t 2>&1 >/dev/null | FileCheck %s
+
+# CHECK: String table .dynstr cannot be removed because it is referenced by the section .dynsym
diff --git a/llvm/test/tools/llvm-objcopy/reloc-error-remove-symtab.test b/llvm/test/tools/llvm-objcopy/reloc-error-remove-symtab.test
new file mode 100644
index 0000000..539e6ea
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/reloc-error-remove-symtab.test
@@ -0,0 +1,32 @@
+# RUN: yaml2obj %s > %t
+# RUN: not llvm-objcopy -R .symtab %t %t2 2>&1 >/dev/null | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+Sections:
+ - Name: .text
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ Address: 0x1000
+ AddressAlign: 0x0000000000000010
+ Content: "0000000000000000"
+ - Name: .rel.text
+ Type: SHT_REL
+ Link: .symtab
+ Info: .text
+ Relocations:
+ - Offset: 0x1000
+ Symbol: foo
+ Type: R_X86_64_PC32
+
+Symbols:
+ Global:
+ - Name: foo
+ Type: STT_FUNC
+ Size: 4
+
+# CHECK: Symbol table .symtab cannot be removed because it is referenced by the relocation section .rel.text.
diff --git a/llvm/test/tools/llvm-objcopy/remove-section-with-symbol.test b/llvm/test/tools/llvm-objcopy/remove-section-with-symbol.test
new file mode 100644
index 0000000..067c0b2
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/remove-section-with-symbol.test
@@ -0,0 +1,54 @@
+# RUN: yaml2obj %s > %t
+# RUN: llvm-objcopy -R .test %t %t2
+# RUN: llvm-readobj -file-headers -symbols %t2 | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+Sections:
+ - Name: .test
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC ]
+ - Name: .test2
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC ]
+Symbols:
+ Global:
+ - Name: test
+ Type: STT_FUNC
+ Section: .test
+ Value: 0x1000
+ Size: 4
+ - Name: test2
+ Type: STT_FUNC
+ Section: .test2
+ Value: 0x1000
+ Size: 4
+
+# The sections counted here should be .test, .symtab, .strtab, and .shstrtab.
+# The 5th section is the null section.
+#CHECK: SectionHeaderCount: 5
+
+#CHECK: Symbols [
+#CHECK-NEXT: Symbol {
+#CHECK-NEXT: Name:
+#CHECK-NEXT: Value: 0x0
+#CHECK-NEXT: Size: 0
+#CHECK-NEXT: Binding: Local
+#CHECK-NEXT: Type: None
+#CHECK-NEXT: Other: 0
+#CHECK-NEXT: Section: Undefined
+#CHECK-NEXT: }
+#CHECK-NEXT: Symbol {
+#CHECK-NEXT: Name: test2
+#CHECK-NEXT: Value: 0x1000
+#CHECK-NEXT: Size: 4
+#CHECK-NEXT: Binding: Global
+#CHECK-NEXT: Type: Function
+#CHECK-NEXT: Other: 0
+#CHECK-NEXT: Section: .test2
+#CHECK-NEXT: }
+#CHECK-NEXT:]
diff --git a/llvm/test/tools/llvm-objcopy/remove-section.test b/llvm/test/tools/llvm-objcopy/remove-section.test
new file mode 100644
index 0000000..0fa26bc
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/remove-section.test
@@ -0,0 +1,109 @@
+# RUN: yaml2obj %s > %t
+# RUN: llvm-objcopy -R=.test2 %t %t2
+# RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+Sections:
+ - Name: .test1
+ Type: SHT_PROGBITS
+ Flags: [ ]
+ - Name: .test2
+ Type: SHT_PROGBITS
+ Flags: [ ]
+ - Name: .test3
+ Type: SHT_PROGBITS
+ Flags: [ ]
+
+# CHECK: SectionHeaderCount: 6
+
+# CHECK: Sections [
+# CHECK: Section {
+# CHECK: Index: 0
+# CHECK: Name: (0)
+# CHECK: Type: SHT_NULL (0x0)
+# CHECK: Flags [ (0x0)
+# CHECK: ]
+# CHECK: Address: 0x0
+# CHECK: Offset:
+# CHECK: Size:
+# CHECK: Link: 0
+# CHECK: Info: 0
+# CHECK: AddressAlignment: 0
+# CHECK: EntrySize: 0
+# CHECK: }
+# CHECK: Section {
+# CHECK: Index: 1
+# CHECK: Name: .test1
+# CHECK: Type: SHT_PROGBITS (0x1)
+# CHECK: Flags [ (0x0)
+# CHECK: ]
+# CHECK: Address: 0x0
+# CHECK: Offset:
+# CHECK: Size:
+# CHECK: Link: 0
+# CHECK: Info: 0
+# CHECK: AddressAlignment: 0
+# CHECK: EntrySize: 0
+# CHECK: }
+# CHECK: Section {
+# CHECK: Index: 2
+# CHECK: Name: .test3
+# CHECK: Type: SHT_PROGBITS (0x1)
+# CHECK: Flags [ (0x0)
+# CHECK: ]
+# CHECK: Address: 0x0
+# CHECK: Offset:
+# CHECK: Size:
+# CHECK: Link: 0
+# CHECK: Info: 0
+# CHECK: AddressAlignment: 0
+# CHECK: EntrySize: 0
+# CHECK: }
+# CHECK: Section {
+# CHECK: Index: 3
+# CHECK: Name: .symtab
+# CHECK: Type: SHT_SYMTAB (0x2)
+# CHECK: Flags [ (0x0)
+# CHECK: ]
+# CHECK: Address: 0x0
+# CHECK: Offset:
+# CHECK: Size:
+# CHECK: Link: 4
+# CHECK: Info: 1
+# CHECK: AddressAlignment: 8
+# CHECK: EntrySize: 24
+# CHECK: }
+# CHECK: Section {
+# CHECK: Index: 4
+# CHECK: Name: .strtab
+# CHECK: Type: SHT_STRTAB (0x3)
+# CHECK: Flags [ (0x0)
+# CHECK: ]
+# CHECK: Address: 0x0
+# CHECK: Offset:
+# CHECK: Size:
+# CHECK: Link: 0
+# CHECK: Info: 0
+# CHECK: AddressAlignment: 1
+# CHECK: EntrySize: 0
+# CHECK: }
+# CHECK: Section {
+# CHECK: Index: 5
+# CHECK: Name: .shstrtab
+# CHECK: Type: SHT_STRTAB (0x3)
+# CHECK: Flags [ (0x0)
+# CHECK: ]
+# CHECK: Address: 0x0
+# CHECK: Offset:
+# CHECK: Size:
+# CHECK: Link: 0
+# CHECK: Info: 0
+# CHECK: AddressAlignment: 1
+# CHECK: EntrySize: 0
+# CHECK: }
+# CHECK: ]
diff --git a/llvm/test/tools/llvm-objcopy/remove-shstrtab-error.test b/llvm/test/tools/llvm-objcopy/remove-shstrtab-error.test
new file mode 100644
index 0000000..7d297ef
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/remove-shstrtab-error.test
@@ -0,0 +1,11 @@
+# RUN: yaml2obj %s > %t
+# RUN: not llvm-objcopy -R .shstrtab %t %t2 2>&1 >/dev/null | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+
+# CHECK: Cannot remove .shstrtab because it is the section header string table.
diff --git a/llvm/test/tools/llvm-objcopy/remove-symtab.test b/llvm/test/tools/llvm-objcopy/remove-symtab.test
new file mode 100644
index 0000000..0e3f82b
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/remove-symtab.test
@@ -0,0 +1,57 @@
+# RUN: yaml2obj %s > %t
+# RUN: llvm-objcopy -R .symtab %t %t2
+# RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+
+#CHECK: SectionHeaderCount: 3
+
+#CHECK: Sections [
+#CHECK-NEXT: Section {
+#CHECK-NEXT: Index: 0
+#CHECK-NEXT: Name: (0)
+#CHECK-NEXT: Type: SHT_NULL (0x0)
+#CHECK-NEXT: Flags [ (0x0)
+#CHECK-NEXT: ]
+#CHECK-NEXT: Address: 0x0
+#CHECK-NEXT: Offset: 0x0
+#CHECK-NEXT: Size: 0
+#CHECK-NEXT: Link: 0
+#CHECK-NEXT: Info: 0
+#CHECK-NEXT: AddressAlignment: 0
+#CHECK-NEXT: EntrySize: 0
+#CHECK-NEXT: }
+#CHECK-NEXT: Section {
+#CHECK-NEXT: Index: 1
+#CHECK-NEXT: Name: .strtab
+#CHECK-NEXT: Type: SHT_STRTAB (0x3)
+#CHECK-NEXT: Flags [ (0x0)
+#CHECK-NEXT: ]
+#CHECK-NEXT: Address: 0x0
+#CHECK-NEXT: Offset:
+#CHECK-NEXT: Size: 1
+#CHECK-NEXT: Link: 0
+#CHECK-NEXT: Info: 0
+#CHECK-NEXT: AddressAlignment: 1
+#CHECK-NEXT: EntrySize: 0
+#CHECK-NEXT: }
+#CHECK-NEXT: Section {
+#CHECK-NEXT: Index: 2
+#CHECK-NEXT: Name: .shstrtab (1)
+#CHECK-NEXT: Type: SHT_STRTAB (0x3)
+#CHECK-NEXT: Flags [ (0x0)
+#CHECK-NEXT: ]
+#CHECK-NEXT: Address: 0x0
+#CHECK-NEXT: Offset:
+#CHECK-NEXT: Size:
+#CHECK-NEXT: Link: 0
+#CHECK-NEXT: Info: 0
+#CHECK-NEXT: AddressAlignment: 1
+#CHECK-NEXT: EntrySize: 0
+#CHECK-NEXT: }
+#CHECK-NEXT: ]
diff --git a/llvm/test/tools/llvm-objcopy/segment-shift-section-remove.test b/llvm/test/tools/llvm-objcopy/segment-shift-section-remove.test
new file mode 100644
index 0000000..caeb559
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/segment-shift-section-remove.test
@@ -0,0 +1,164 @@
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-objcopy -R .text2 %t %t2
+# RUN: llvm-readobj -file-headers -sections -program-headers %t2 | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_EXEC
+ Machine: EM_X86_64
+Sections:
+ - Name: .text
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ Address: 0x1000
+ AddressAlign: 0x1000
+ Size: 0x1000
+ - Name: .text2
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ Address: 0x2000
+ AddressAlign: 0x1000
+ Size: 0x1000
+ - Name: .text3
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ Address: 0x3000
+ AddressAlign: 0x1000
+ Size: 0x1000
+ProgramHeaders:
+ - Type: PT_LOAD
+ Flags: [ PF_R ]
+ VAddr: 0x1000
+ PAddr: 0x1000
+ Sections:
+ - Section: .text
+ - Type: PT_LOAD
+ Flags: [ PF_X, PF_R ]
+ VAddr: 0x3000
+ PAddr: 0x3000
+ Sections:
+ - Section: .text3
+
+#CHECK: SectionHeaderCount: 6
+
+# CHECK: Sections [
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 0
+# CHECK-NEXT: Name: (0)
+# CHECK-NEXT: Type: SHT_NULL (0x0)
+# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x0
+# CHECK-NEXT: Offset: 0x0
+# CHECK-NEXT: Size: 0
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 0
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 1
+# CHECK-NEXT: Name: .text
+# CHECK-NEXT: Type: SHT_PROGBITS (0x1)
+# CHECK-NEXT: Flags [ (0x6)
+# CHECK-NEXT: SHF_ALLOC (0x2)
+# CHECK-NEXT: SHF_EXECINSTR (0x4)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x1000
+# CHECK-NEXT: Offset: 0x1000
+# CHECK-NEXT: Size: 4096
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 4096
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 2
+# CHECK-NEXT: Name: .text3
+# CHECK-NEXT: Type: SHT_PROGBITS (0x1)
+# CHECK-NEXT: Flags [ (0x6)
+# CHECK-NEXT: SHF_ALLOC (0x2)
+# CHECK-NEXT: SHF_EXECINSTR (0x4)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x3000
+# CHECK-NEXT: Offset: 0x2000
+# CHECK-NEXT: Size: 4096
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 4096
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 3
+# CHECK-NEXT: Name: .symtab
+# CHECK-NEXT: Type: SHT_SYMTAB (0x2)
+# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x0
+# CHECK-NEXT: Offset: 0x3000
+# CHECK-NEXT: Size: 24
+# CHECK-NEXT: Link: 4
+# CHECK-NEXT: Info: 1
+# CHECK-NEXT: AddressAlignment: 8
+# CHECK-NEXT: EntrySize: 24
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 4
+# CHECK-NEXT: Name: .strtab
+# CHECK-NEXT: Type: SHT_STRTAB (0x3)
+# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x0
+# CHECK-NEXT: Offset: 0x3018
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 1
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 5
+# CHECK-NEXT: Name: .shstrtab
+# CHECK-NEXT: Type: SHT_STRTAB (0x3)
+# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x0
+# CHECK-NEXT: Offset:
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 1
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: ]
+
+
+# CHECK: ProgramHeaders [
+# CHECK-NEXT: ProgramHeader {
+# CHECK-NEXT: Type: PT_LOAD (0x1)
+# CHECK-NEXT: Offset: 0x1000
+# CHECK-NEXT: VirtualAddress: 0x1000
+# CHECK-NEXT: PhysicalAddress: 0x1000
+# CHECK-NEXT: FileSize: 4096
+# CHECK-NEXT: MemSize: 4096
+# CHECK-NEXT: Flags [ (0x4)
+# CHECK-NEXT: PF_R (0x4)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Alignment: 4096
+# CHECK-NEXT: }
+# CHECK-NEXT: ProgramHeader {
+# CHECK-NEXT: Type: PT_LOAD (0x1)
+# CHECK-NEXT: Offset: 0x2000
+# CHECK-NEXT: VirtualAddress: 0x3000
+# CHECK-NEXT: PhysicalAddress: 0x3000
+# CHECK-NEXT: FileSize: 4096
+# CHECK-NEXT: MemSize: 4096
+# CHECK-NEXT: Flags [ (0x5)
+# CHECK-NEXT: PF_R (0x4)
+# CHECK-NEXT: PF_X (0x1)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Alignment: 4096
+# CHECK-NEXT: }
+# CHECK-NEXT:]
diff --git a/llvm/test/tools/llvm-objcopy/segment-test-remove-section.test b/llvm/test/tools/llvm-objcopy/segment-test-remove-section.test
new file mode 100644
index 0000000..9b98dc8
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/segment-test-remove-section.test
@@ -0,0 +1,156 @@
+# This test is checking to ensure that if a section is removed in the presence
+# of a segment that the segment maintains its shape and properties and that any
+# section inside that segment maintains the relative positioning it had in the
+# segment. Note worthy is that .text3 keeps its offset despite it being
+# possible to place it after .text when .text2 is removed.
+
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-objcopy -R .text2 %t %t2
+# RUN: llvm-readobj -file-headers -program-headers -sections %t2 | FileCheck %s
+# RUN: od -t x1 -j 8192 %t2 | FileCheck %s --check-prefix=DATA
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_EXEC
+ Machine: EM_X86_64
+Sections:
+ - Name: .text
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ Address: 0x1000
+ AddressAlign: 0x1000
+ Size: 4096
+ - Name: .text2
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ Address: 0x2000
+ AddressAlign: 0x1000
+ Size: 4096
+ Content: "DEADBEEF"
+ - Name: .text3
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ Address: 0x3000
+ AddressAlign: 0x1000
+ Size: 4096
+ProgramHeaders:
+ - Type: PT_LOAD
+ Flags: [ PF_X, PF_R ]
+ Sections:
+ - Section: .text
+ - Section: .text2
+ - Section: .text3
+
+# Make sure that when we remove a section we overwrite it with zeros
+# DATA: 0020000 00 00 00 00
+
+#CHECK: SectionHeaderCount: 6
+
+# CHECK: Sections [
+# CHECK: Section {
+# CHECK-NEXT: Index: 0
+# CHECK-NEXT: Name: (0)
+# CHECK-NEXT: Type: SHT_NULL (0x0)
+# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x0
+# CHECK-NEXT: Offset:
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 0
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 1
+# CHECK-NEXT: Name: .text
+# CHECK-NEXT: Type: SHT_PROGBITS
+# CHECK-NEXT: Flags [
+# CHECK-NEXT: SHF_ALLOC
+# CHECK-NEXT: SHF_EXECINSTR
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x1000
+# CHECK-NEXT: Offset: 0x1000
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 4096
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 2
+# CHECK-NEXT: Name: .text3
+# CHECK-NEXT: Type: SHT_PROGBITS (0x1)
+# CHECK-NEXT: Flags [
+# CHECK-NEXT: SHF_ALLOC
+# CHECK-NEXT: SHF_EXECINSTR
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x3000
+# CHECK-NEXT: Offset: 0x3000
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 4096
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 3
+# CHECK-NEXT: Name: .symtab
+# CHECK-NEXT: Type: SHT_SYMTAB (0x2)
+# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x0
+# CHECK-NEXT: Offset:
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Link: 4
+# CHECK-NEXT: Info: 1
+# CHECK-NEXT: AddressAlignment: 8
+# CHECK-NEXT: EntrySize: 24
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 4
+# CHECK-NEXT: Name: .strtab
+# CHECK-NEXT: Type: SHT_STRTAB (0x3)
+# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x0
+# CHECK-NEXT: Offset:
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 1
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Section {
+# CHECK-NEXT: Index: 5
+# CHECK-NEXT: Name: .shstrtab
+# CHECK-NEXT: Type: SHT_STRTAB (0x3)
+# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: ]
+# CHECK-NEXT: Address: 0x0
+# CHECK-NEXT: Offset:
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Link: 0
+# CHECK-NEXT: Info: 0
+# CHECK-NEXT: AddressAlignment: 1
+# CHECK-NEXT: EntrySize: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: ]
+
+#CHECK: ProgramHeaders [
+#CHECK-NEXT: ProgramHeader {
+#CHECK-NEXT: Type: PT_LOAD (0x1)
+#CHECK-NEXT: Offset: 0x1000
+#CHECK-NEXT: VirtualAddress: 0x0
+#CHECK-NEXT: PhysicalAddress: 0x0
+#CHECK-NEXT: FileSize: 12288
+#CHECK-NEXT: MemSize: 12288
+#CHECK-NEXT: Flags [ (0x5)
+#CHECK-NEXT: PF_R (0x4)
+#CHECK-NEXT: PF_X (0x1)
+#CHECK-NEXT: ]
+#CHECK-NEXT: Alignment: 4096
+#CHECK-NEXT: }
+#CHECK-NEXT:]
diff --git a/llvm/test/tools/llvm-objcopy/symtab-error-on-remove-strtab.test b/llvm/test/tools/llvm-objcopy/symtab-error-on-remove-strtab.test
new file mode 100644
index 0000000..d960399
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/symtab-error-on-remove-strtab.test
@@ -0,0 +1,11 @@
+# RUN: yaml2obj %s > %t
+# RUN: not llvm-objcopy -R .strtab %t %t2 2>&1 >/dev/null | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+
+# CHECK: String table .strtab cannot be removed because it is referenced by the symbol table .symtab