Index: llvm/trunk/test/Object/AArch64/yaml2obj-elf-aarch64-rel.yaml
===================================================================
--- llvm/trunk/test/Object/AArch64/yaml2obj-elf-aarch64-rel.yaml
+++ llvm/trunk/test/Object/AArch64/yaml2obj-elf-aarch64-rel.yaml
@@ -5,6 +5,7 @@
 # CHECK-NEXT:   Type:            SHT_RELA
 # CHECK-NEXT:    Link:            .symtab
 # CHECK-NEXT:    AddressAlign:    0x0000000000000008
+# CHECK-NEXT:    EntSize:         0x0000000000000018
 # CHECK-NEXT:    Info:            .text
 # CHECK-NEXT:    Relocations:     
 # CHECK-NEXT:      - Offset:          0x0000000000000000
Index: llvm/trunk/test/Object/Mips/abi-flags.yaml
===================================================================
--- llvm/trunk/test/Object/Mips/abi-flags.yaml
+++ llvm/trunk/test/Object/Mips/abi-flags.yaml
@@ -25,6 +25,7 @@
 # YAML-NEXT: - Name:            .MIPS.abiflags
 # YAML-NEXT:   Type:            SHT_MIPS_ABIFLAGS
 # YAML-NEXT:   AddressAlign:    0x0000000000000008
+# YAML-NEXT:   EntSize:         0x0000000000000018
 # YAML-NEXT:   ISA:             MIPS64
 # YAML-NEXT:   ISARevision:     0x05
 # YAML-NEXT:   ISAExtension:    EXT_OCTEON3
Index: llvm/trunk/test/Object/obj2yaml-invalid-reloc.test
===================================================================
--- llvm/trunk/test/Object/obj2yaml-invalid-reloc.test
+++ llvm/trunk/test/Object/obj2yaml-invalid-reloc.test
@@ -17,6 +17,7 @@
 CHECK-NEXT:     Type:            SHT_RELA
 CHECK-NEXT:     Link:            .symtab
 CHECK-NEXT:     AddressAlign:    0x0000000000000008
+CHECK-NEXT:     EntSize:         0x0000000000000018
 CHECK-NEXT:     Info:            .text
 CHECK-NEXT:     Relocations:
 CHECK-NEXT:       - Offset:          0x0000000000000000
Index: llvm/trunk/test/Object/obj2yaml.test
===================================================================
--- llvm/trunk/test/Object/obj2yaml.test
+++ llvm/trunk/test/Object/obj2yaml.test
@@ -364,6 +364,7 @@
 ELF-MIPSEL-NEXT:     Type:            SHT_REL
 ELF-MIPSEL-NEXT:     Link:            .symtab
 ELF-MIPSEL-NEXT:     AddressAlign:    0x0000000000000004
+ELF-MIPSEL-NEXT:     EntSize:         0x0000000000000008
 ELF-MIPSEL-NEXT:     Info:            .text
 ELF-MIPSEL-NEXT:     Relocations:
 ELF-MIPSEL-NEXT:       - Offset:          0x0000000000000000
@@ -402,6 +403,7 @@
 ELF-MIPSEL-NEXT:     Type:            SHT_PROGBITS
 ELF-MIPSEL-NEXT:     Flags:           [ SHF_ALLOC, SHF_MERGE, SHF_STRINGS ]
 ELF-MIPSEL-NEXT:     AddressAlign:    0x0000000000000001
+ELF-MIPSEL-NEXT:     EntSize:         0x0000000000000001
 ELF-MIPSEL-NEXT:     Content:         48656C6C6F20576F726C640A00
 ELF-MIPSEL-NEXT:   - Name:            .reginfo
 ELF-MIPSEL-NEXT:     Type:            SHT_MIPS_REGINFO
@@ -481,6 +483,7 @@
 ELF-MIPS64EL-NEXT:     Type:            SHT_RELA
 ELF-MIPS64EL-NEXT:     Link:            .symtab
 ELF-MIPS64EL-NEXT:     AddressAlign:    0x0000000000000008
+ELF-MIPS64EL-NEXT:     EntSize:         0x0000000000000018
 ELF-MIPS64EL-NEXT:     Info:            .data
 ELF-MIPS64EL-NEXT:     Relocations:
 ELF-MIPS64EL-NEXT:       - Offset:          0
@@ -494,6 +497,7 @@
 ELF-MIPS64EL-NEXT:     Type:            SHT_MIPS_OPTIONS
 ELF-MIPS64EL-NEXT:     Flags:           [ SHF_ALLOC, SHF_MIPS_NOSTRIP ]
 ELF-MIPS64EL-NEXT:     AddressAlign:    0x0000000000000008
+ELF-MIPS64EL-NEXT:     EntSize:         0x0000000000000001
 ELF-MIPS64EL-NEXT:     Content:         '01280000000000000000000000000000000000000000000000000000000000000000000000000000'
 ELF-MIPS64EL-NEXT:   - Name:            .pdr
 ELF-MIPS64EL-NEXT:     Type:            SHT_PROGBITS
@@ -549,6 +553,7 @@
 ELF-X86-64-NEXT:     Address:         0x0000000000000038
 ELF-X86-64-NEXT:     Link:            .symtab
 ELF-X86-64-NEXT:     AddressAlign:    0x0000000000000008
+ELF-X86-64-NEXT:     EntSize:         0x0000000000000018
 ELF-X86-64-NEXT:     Info:            .text
 ELF-X86-64-NEXT:     Relocations:
 ELF-X86-64-NEXT:       - Offset:          0x000000000000000D
Index: llvm/trunk/test/tools/obj2yaml/elf-entsize.yaml
===================================================================
--- llvm/trunk/test/tools/obj2yaml/elf-entsize.yaml
+++ llvm/trunk/test/tools/obj2yaml/elf-entsize.yaml
@@ -0,0 +1,21 @@
+# RUN: yaml2obj %s -o %t
+# RUN: obj2yaml %t | FileCheck %s
+
+## Check obj2yaml is able to dump sh_entsize field of a section.
+
+# CHECK:      - Name:            .rodata.cst4
+# CHECK-NEXT:   Type:            SHT_PROGBITS
+# CHECK-NEXT:   Flags:           [ SHF_ALLOC, SHF_MERGE ]
+# CHECK-NEXT:   EntSize:         0x0000000000000004
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS64
+  Data:            ELFDATA2LSB
+  Type:            ET_REL
+  Machine:         EM_X86_64
+Sections:
+  - Name:            .rodata.cst4
+    Type:            SHT_PROGBITS
+    Flags:           [ SHF_ALLOC, SHF_MERGE ]
+    EntSize:         0x0000000000000004
Index: llvm/trunk/tools/obj2yaml/elf2yaml.cpp
===================================================================
--- llvm/trunk/tools/obj2yaml/elf2yaml.cpp
+++ llvm/trunk/tools/obj2yaml/elf2yaml.cpp
@@ -317,6 +317,8 @@
   S.Flags = Shdr->sh_flags;
   S.Address = Shdr->sh_addr;
   S.AddressAlign = Shdr->sh_addralign;
+  if (Shdr->sh_entsize)
+    S.EntSize = static_cast<llvm::yaml::Hex64>(Shdr->sh_entsize);
 
   auto NameOrErr = getUniquedSectionName(Shdr);
   if (!NameOrErr)