diff --git a/llvm/include/llvm/BinaryFormat/ELF.h b/llvm/include/llvm/BinaryFormat/ELF.h
--- a/llvm/include/llvm/BinaryFormat/ELF.h
+++ b/llvm/include/llvm/BinaryFormat/ELF.h
@@ -949,6 +949,9 @@
   // Identifies a section containing compressed data.
   SHF_COMPRESSED = 0x800U,
 
+  // This section should not be garbage collected by the linker.
+  SHF_GNU_RETAIN = 0x200000,
+
   // This section is excluded from the final executable or shared library.
   SHF_EXCLUDE = 0x80000000U,
 
diff --git a/llvm/lib/ObjectYAML/ELFYAML.cpp b/llvm/lib/ObjectYAML/ELFYAML.cpp
--- a/llvm/lib/ObjectYAML/ELFYAML.cpp
+++ b/llvm/lib/ObjectYAML/ELFYAML.cpp
@@ -555,6 +555,7 @@
   BCase(SHF_GROUP);
   BCase(SHF_TLS);
   BCase(SHF_COMPRESSED);
+  BCase(SHF_GNU_RETAIN);
   switch (Object->getMachine()) {
   case ELF::EM_ARM:
     BCase(SHF_ARM_PURECODE);
diff --git a/llvm/test/tools/llvm-readobj/ELF/section-flags-os-proc.test b/llvm/test/tools/llvm-readobj/ELF/section-flags-os-proc.test
--- a/llvm/test/tools/llvm-readobj/ELF/section-flags-os-proc.test
+++ b/llvm/test/tools/llvm-readobj/ELF/section-flags-os-proc.test
@@ -11,10 +11,12 @@
 # OS-PROC-LLVM:      Name: .os.flags.high
 # OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
 # OS-PROC-LLVM-NEXT: Flags [ (0xFE00000)
+# OS-PROC-LLVM-NEXT:   SHF_GNU_RETAIN (0x200000)
 # OS-PROC-LLVM-NEXT: ]
 # OS-PROC-LLVM:      Name: .os.flags.mask
 # OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
 # OS-PROC-LLVM-NEXT: Flags [ (0xFF00000)
+# OS-PROC-LLVM-NEXT:   SHF_GNU_RETAIN (0x200000)
 # OS-PROC-LLVM-NEXT: ]
 # OS-PROC-LLVM:      Name: .proc.flags.low
 # OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
@@ -38,11 +40,19 @@
 # OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
 # OS-PROC-LLVM-NEXT: Flags [ (0xEFE00000)
 # OS-PROC-LLVM-NEXT:   SHF_EXCLUDE (0x80000000)
+# OS-PROC-LLVM-NEXT:   SHF_GNU_RETAIN (0x200000)
 # OS-PROC-LLVM-NEXT: ]
 # OS-PROC-LLVM:      Name: .both.flags.mask
 # OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
 # OS-PROC-LLVM-NEXT: Flags [ (0xFFF00000)
 # OS-PROC-LLVM-NEXT:   SHF_EXCLUDE (0x80000000)
+# OS-PROC-LLVM-NEXT:   SHF_GNU_RETAIN (0x200000)
+# OS-PROC-LLVM-NEXT: ]
+# OS-PROC-LLVM:      Name: .gnu.retain
+# OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
+# OS-PROC-LLVM-NEXT: Flags [ (0x200800)
+# OS-PROC-LLVM-NEXT:   SHF_COMPRESSED (0x800)
+# OS-PROC-LLVM-NEXT:   SHF_GNU_RETAIN (0x200000)
 # OS-PROC-LLVM-NEXT: ]
 # OS-PROC-LLVM:      Name: .exclude
 # OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
@@ -56,6 +66,7 @@
 # OS-PROC-LLVM-NEXT:   SHF_COMPRESSED (0x800)
 # OS-PROC-LLVM-NEXT:   SHF_EXCLUDE (0x80000000)
 # OS-PROC-LLVM-NEXT:   SHF_EXECINSTR (0x4)
+# OS-PROC-LLVM-NEXT:   SHF_GNU_RETAIN (0x200000)
 # OS-PROC-LLVM-NEXT:   SHF_GROUP (0x200)
 # OS-PROC-LLVM-NEXT:   SHF_INFO_LINK (0x40)
 # OS-PROC-LLVM-NEXT:   SHF_LINK_ORDER (0x80)
@@ -70,16 +81,17 @@
 # OS-PROC-GNU-NEXT:  [Nr] Name                   Type     Address          Off    Size   ES Flg            Lk Inf Al
 # OS-PROC-GNU-NEXT:  [ 0]                        NULL     0000000000000000 000000 000000 00                0   0  0
 # OS-PROC-GNU-NEXT:  [ 1] .os.flags.low          PROGBITS 0000000000000000 000040 000000 00   o            0   0  0
-# OS-PROC-GNU-NEXT:  [ 2] .os.flags.high         PROGBITS 0000000000000000 000040 000000 00   o            0   0  0
+# OS-PROC-GNU-NEXT:  [ 2] .os.flags.high         PROGBITS 0000000000000000 000040 000000 00  Ro            0   0  0
 # OS-PROC-GNU-NEXT:  [ 3] .os.flags.mask         PROGBITS 0000000000000000 000040 000000 00   o            0   0  0
 # OS-PROC-GNU-NEXT:  [ 4] .proc.flags.low        PROGBITS 0000000000000000 000040 000000 00   p            0   0  0
 # OS-PROC-GNU-NEXT:  [ 5] .proc.flags.high       PROGBITS 0000000000000000 000040 000000 00   p            0   0  0
 # OS-PROC-GNU-NEXT:  [ 6] .proc.flags.mask       PROGBITS 0000000000000000 000040 000000 00   p            0   0  0
 # OS-PROC-GNU-NEXT:  [ 7] .both.flags.low        PROGBITS 0000000000000000 000040 000000 00  op            0   0  0
-# OS-PROC-GNU-NEXT:  [ 8] .both.flags.high       PROGBITS 0000000000000000 000040 000000 00  op            0   0  0
+# OS-PROC-GNU-NEXT:  [ 8] .both.flags.high       PROGBITS 0000000000000000 000040 000000 00 Rop            0   0  0
 # OS-PROC-GNU-NEXT:  [ 9] .both.flags.mask       PROGBITS 0000000000000000 000040 000000 00  op            0   0  0
-# OS-PROC-GNU-NEXT:  [10] .exclude               PROGBITS 0000000000000000 000040 000000 00   E            0   0  0
-# OS-PROC-GNU-NEXT:  [11] .all.possible          PROGBITS 0000000000000000 000040 000000 00 WAXMSILOGTCopx 0   0  0
+# OS-PROC-GNU-NEXT:  [10] .gnu.retain            PROGBITS 0000000000000000 000040 000000 00  CR            0   0  0
+# OS-PROC-GNU-NEXT:  [11] .exclude               PROGBITS 0000000000000000 000040 000000 00   E            0   0  0
+# OS-PROC-GNU-NEXT:  [12] .all.possible          PROGBITS 0000000000000000 000040 000000 00 WAXMSILOGTCopx 0   0  0
 
 ## Use an arbitrary EM_* machine type that does not have specific SHF_* OS/Processor
 ## flags to test what we dump when bits in the OS and processor specific ranges are set.
@@ -89,6 +101,7 @@
   Class: ELFCLASS64
   Data:  ELFDATA2LSB
   Type:  ET_REL
+  OSABI: ELFOSABI_GNU
 Sections:
   - Name:  .os.flags.low
     Type:  SHT_PROGBITS
@@ -117,6 +130,11 @@
   - Name:  .both.flags.mask
     Type:  SHT_PROGBITS
     ShFlags: 0xFFF00000
+## GNU readelf prints SHF_GNU_RETAIN (0x200000; 'R') for ELFOSABI_GNU and
+## ELFOSABI_FREEBSD. Currently we don't inspect EI_OSABI.
+  - Name:  .gnu.retain
+    Type:  SHT_PROGBITS
+    ShFlags: 0x200800
 ## SHF_MASKPROC has a value of 0xf0000000, SHF_EXCLUDE has a value of
 ## 0x80000000. When SHF_EXCLUDE is mixed with other processor specific
 ## flags, GNU readelf does not necessarily print "E", because it handles
diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -1201,6 +1201,7 @@
   ENUM_ENT(SHF_GROUP,            "G"),
   ENUM_ENT(SHF_TLS,              "T"),
   ENUM_ENT(SHF_COMPRESSED,       "C"),
+  ENUM_ENT(SHF_GNU_RETAIN,       "R"),
   ENUM_ENT(SHF_EXCLUDE,          "E"),
 };