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
@@ -900,6 +900,18 @@
 #include "ELFRelocs/CSKY.def"
 };
 
+// LoongArch Specific e_flags
+enum : unsigned {
+  // Base ABI Types.
+  EF_LOONGARCH_BASE_ABI_LP64S = 0x1,  // LP64 soft-float ABI
+  EF_LOONGARCH_BASE_ABI_LP64F = 0x2,  // LP64 single-float ABI
+  EF_LOONGARCH_BASE_ABI_LP64D = 0x3,  // LP64 double-float ABI
+  EF_LOONGARCH_BASE_ABI_ILP32S = 0x5, // ILP32 soft-float ABI
+  EF_LOONGARCH_BASE_ABI_ILP32F = 0x6, // ILP32 single-float ABI
+  EF_LOONGARCH_BASE_ABI_ILP32D = 0x7, // ILP32 double-float ABI
+  EF_LOONGARCH_BASE_ABI_MASK = 0x7    // Mask for selecting base ABI
+};
+
 // ELF Relocation types for LoongArch
 enum {
 #include "ELFRelocs/LoongArch.def"
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
@@ -518,6 +518,14 @@
     BCaseMask(EF_AVR_ARCH_XMEGA7, EF_AVR_ARCH_MASK);
     BCase(EF_AVR_LINKRELAX_PREPARED);
     break;
+  case ELF::EM_LOONGARCH:
+    BCaseMask(EF_LOONGARCH_BASE_ABI_ILP32S, EF_LOONGARCH_BASE_ABI_MASK);
+    BCaseMask(EF_LOONGARCH_BASE_ABI_ILP32F, EF_LOONGARCH_BASE_ABI_MASK);
+    BCaseMask(EF_LOONGARCH_BASE_ABI_ILP32D, EF_LOONGARCH_BASE_ABI_MASK);
+    BCaseMask(EF_LOONGARCH_BASE_ABI_LP64S, EF_LOONGARCH_BASE_ABI_MASK);
+    BCaseMask(EF_LOONGARCH_BASE_ABI_LP64F, EF_LOONGARCH_BASE_ABI_MASK);
+    BCaseMask(EF_LOONGARCH_BASE_ABI_LP64D, EF_LOONGARCH_BASE_ABI_MASK);
+    break;
   case ELF::EM_RISCV:
     BCase(EF_RISCV_RVC);
     BCaseMask(EF_RISCV_FLOAT_ABI_SOFT, EF_RISCV_FLOAT_ABI);
diff --git a/llvm/test/Object/LoongArch/elf-flags.yaml b/llvm/test/Object/LoongArch/elf-flags.yaml
new file mode 100644
--- /dev/null
+++ b/llvm/test/Object/LoongArch/elf-flags.yaml
@@ -0,0 +1,156 @@
+# RUN: yaml2obj --docnum=1 %s > %t-lp64s
+# RUN: llvm-readobj -h %t-lp64s | FileCheck --check-prefix=READOBJ-LP64S %s
+# RUN: llvm-readelf -h %t-lp64s | FileCheck --check-prefix=READELF-LP64S --match-full-lines %s
+# RUN: obj2yaml %t-lp64s | FileCheck --check-prefix=YAML-LP64S %s
+
+# RUN: yaml2obj --docnum=2 %s > %t-lp64f
+# RUN: llvm-readobj -h %t-lp64f | FileCheck --check-prefix=READOBJ-LP64F %s
+# RUN: llvm-readelf -h %t-lp64f | FileCheck --check-prefix=READELF-LP64F --match-full-lines %s
+# RUN: obj2yaml %t-lp64f | FileCheck --check-prefix=YAML-LP64F %s
+
+# RUN: yaml2obj --docnum=3 %s > %t-lp64d
+# RUN: llvm-readobj -h %t-lp64d | FileCheck --check-prefix=READOBJ-LP64D %s
+# RUN: llvm-readelf -h %t-lp64d | FileCheck --check-prefix=READELF-LP64D --match-full-lines %s
+# RUN: obj2yaml %t-lp64d | FileCheck --check-prefix=YAML-LP64D %s
+
+# RUN: yaml2obj --docnum=4 %s > %t-ilp32s
+# RUN: llvm-readobj -h %t-ilp32s | FileCheck --check-prefix=READOBJ-ILP32S %s
+# RUN: llvm-readelf -h %t-ilp32s | FileCheck --check-prefix=READELF-ILP32S --match-full-lines %s
+# RUN: obj2yaml %t-ilp32s | FileCheck --check-prefix=YAML-ILP32S %s
+
+# RUN: yaml2obj --docnum=5 %s > %t-ilp32f
+# RUN: llvm-readobj -h %t-ilp32f | FileCheck --check-prefix=READOBJ-ILP32F %s
+# RUN: llvm-readelf -h %t-ilp32f | FileCheck --check-prefix=READELF-ILP32F --match-full-lines %s
+# RUN: obj2yaml %t-ilp32f | FileCheck --check-prefix=YAML-ILP32F %s
+
+# RUN: yaml2obj --docnum=6 %s > %t-ilp32d
+# RUN: llvm-readobj -h %t-ilp32d | FileCheck --check-prefix=READOBJ-ILP32D %s
+# RUN: llvm-readelf -h %t-ilp32d | FileCheck --check-prefix=READELF-ILP32D --match-full-lines %s
+# RUN: obj2yaml %t-ilp32d | FileCheck --check-prefix=YAML-ILP32D %s
+
+# READOBJ-LP64S: Flags [ (0x1)
+# READOBJ-LP64S-NEXT:   EF_LOONGARCH_BASE_ABI_LP64S (0x1)
+# READOBJ-LP64S-NEXT: ]
+
+# READOBJ-LP64F: Flags [ (0x2)
+# READOBJ-LP64F-NEXT:   EF_LOONGARCH_BASE_ABI_LP64F (0x2)
+# READOBJ-LP64F-NEXT: ]
+
+# READOBJ-LP64D: Flags [ (0x3)
+# READOBJ-LP64D-NEXT:   EF_LOONGARCH_BASE_ABI_LP64D (0x3)
+# READOBJ-LP64D-NEXT: ]
+
+# READOBJ-ILP32S: Flags [ (0x5)
+# READOBJ-ILP32S-NEXT:   EF_LOONGARCH_BASE_ABI_ILP32S (0x5)
+# READOBJ-ILP32S-NEXT: ]
+
+# READOBJ-ILP32F: Flags [ (0x6)
+# READOBJ-ILP32F-NEXT:   EF_LOONGARCH_BASE_ABI_ILP32F (0x6)
+# READOBJ-ILP32F-NEXT: ]
+
+# READOBJ-ILP32D: Flags [ (0x7)
+# READOBJ-ILP32D-NEXT:   EF_LOONGARCH_BASE_ABI_ILP32D (0x7)
+# READOBJ-ILP32D-NEXT: ]
+
+# READELF-LP64S: Flags: 0x1, LP64, SOFT-FLOAT
+# READELF-LP64F: Flags: 0x2, LP64, SINGLE-FLOAT
+# READELF-LP64D: Flags: 0x3, LP64, DOUBLE-FLOAT
+# READELF-ILP32S: Flags: 0x5, ILP32, SOFT-FLOAT
+# READELF-ILP32F: Flags: 0x6, ILP32, SINGLE-FLOAT
+# READELF-ILP32D: Flags: 0x7, ILP32, DOUBLE-FLOAT
+
+# YAML-LP64S:      FileHeader:
+# YAML-LP64S-NEXT:   Class:           ELFCLASS64
+# YAML-LP64S-NEXT:   Data:            ELFDATA2LSB
+# YAML-LP64S-NEXT:   Type:            ET_EXEC
+# YAML-LP64S-NEXT:   Machine:         EM_LOONGARCH
+# YAML-LP64S-NEXT:   Flags:           [ EF_LOONGARCH_BASE_ABI_LP64S ]
+
+# YAML-LP64F:      FileHeader:
+# YAML-LP64F-NEXT:   Class:           ELFCLASS64
+# YAML-LP64F-NEXT:   Data:            ELFDATA2LSB
+# YAML-LP64F-NEXT:   Type:            ET_EXEC
+# YAML-LP64F-NEXT:   Machine:         EM_LOONGARCH
+# YAML-LP64F-NEXT:   Flags:           [ EF_LOONGARCH_BASE_ABI_LP64F ]
+
+# YAML-LP64D:      FileHeader:
+# YAML-LP64D-NEXT:   Class:           ELFCLASS64
+# YAML-LP64D-NEXT:   Data:            ELFDATA2LSB
+# YAML-LP64D-NEXT:   Type:            ET_EXEC
+# YAML-LP64D-NEXT:   Machine:         EM_LOONGARCH
+# YAML-LP64D-NEXT:   Flags:           [ EF_LOONGARCH_BASE_ABI_LP64D ]
+
+# YAML-ILP32S:      FileHeader:
+# YAML-ILP32S-NEXT:   Class:           ELFCLASS32
+# YAML-ILP32S-NEXT:   Data:            ELFDATA2LSB
+# YAML-ILP32S-NEXT:   Type:            ET_EXEC
+# YAML-ILP32S-NEXT:   Machine:         EM_LOONGARCH
+# YAML-ILP32S-NEXT:   Flags:           [ EF_LOONGARCH_BASE_ABI_ILP32S ]
+
+# YAML-ILP32F:      FileHeader:
+# YAML-ILP32F-NEXT:   Class:           ELFCLASS32
+# YAML-ILP32F-NEXT:   Data:            ELFDATA2LSB
+# YAML-ILP32F-NEXT:   Type:            ET_EXEC
+# YAML-ILP32F-NEXT:   Machine:         EM_LOONGARCH
+# YAML-ILP32F-NEXT:   Flags:           [ EF_LOONGARCH_BASE_ABI_ILP32F ]
+
+# YAML-ILP32D:      FileHeader:
+# YAML-ILP32D-NEXT:   Class:           ELFCLASS32
+# YAML-ILP32D-NEXT:   Data:            ELFDATA2LSB
+# YAML-ILP32D-NEXT:   Type:            ET_EXEC
+# YAML-ILP32D-NEXT:   Machine:         EM_LOONGARCH
+# YAML-ILP32D-NEXT:   Flags:           [ EF_LOONGARCH_BASE_ABI_ILP32D ]
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS64
+  Data:            ELFDATA2LSB
+  Type:            ET_EXEC
+  Machine:         EM_LOONGARCH
+  Flags:           [ EF_LOONGARCH_BASE_ABI_LP64S ]
+...
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS64
+  Data:            ELFDATA2LSB
+  Type:            ET_EXEC
+  Machine:         EM_LOONGARCH
+  Flags:           [ EF_LOONGARCH_BASE_ABI_LP64F ]
+...
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS64
+  Data:            ELFDATA2LSB
+  Type:            ET_EXEC
+  Machine:         EM_LOONGARCH
+  Flags:           [ EF_LOONGARCH_BASE_ABI_LP64D ]
+...
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS32
+  Data:            ELFDATA2LSB
+  Type:            ET_EXEC
+  Machine:         EM_LOONGARCH
+  Flags:           [ EF_LOONGARCH_BASE_ABI_ILP32S ]
+...
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS32
+  Data:            ELFDATA2LSB
+  Type:            ET_EXEC
+  Machine:         EM_LOONGARCH
+  Flags:           [ EF_LOONGARCH_BASE_ABI_ILP32F ]
+...
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS32
+  Data:            ELFDATA2LSB
+  Type:            ET_EXEC
+  Machine:         EM_LOONGARCH
+  Flags:           [ EF_LOONGARCH_BASE_ABI_ILP32D ]
+...
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
@@ -1626,6 +1626,15 @@
   ENUM_ENT(EF_RISCV_TSO, "TSO"),
 };
 
+static const EnumEntry<unsigned> ElfHeaderLoongArchFlags[] = {
+    ENUM_ENT(EF_LOONGARCH_BASE_ABI_ILP32S, "ILP32, SOFT-FLOAT"),
+    ENUM_ENT(EF_LOONGARCH_BASE_ABI_ILP32F, "ILP32, SINGLE-FLOAT"),
+    ENUM_ENT(EF_LOONGARCH_BASE_ABI_ILP32D, "ILP32, DOUBLE-FLOAT"),
+    ENUM_ENT(EF_LOONGARCH_BASE_ABI_LP64S, "LP64, SOFT-FLOAT"),
+    ENUM_ENT(EF_LOONGARCH_BASE_ABI_LP64F, "LP64, SINGLE-FLOAT"),
+    ENUM_ENT(EF_LOONGARCH_BASE_ABI_LP64D, "LP64, DOUBLE-FLOAT"),
+};
+
 const EnumEntry<unsigned> ElfHeaderAVRFlags[] = {
   LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR1),
   LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR2),
@@ -3357,6 +3366,9 @@
   else if (e.e_machine == EM_AVR)
     ElfFlags = printFlags(e.e_flags, makeArrayRef(ElfHeaderAVRFlags),
                           unsigned(ELF::EF_AVR_ARCH_MASK));
+  else if (e.e_machine == EM_LOONGARCH)
+    ElfFlags = printFlags(e.e_flags, makeArrayRef(ElfHeaderLoongArchFlags),
+                          unsigned(ELF::EF_LOONGARCH_BASE_ABI_MASK));
   Str = "0x" + utohexstr(e.e_flags);
   if (!ElfFlags.empty())
     Str = Str + ", " + ElfFlags;
@@ -6504,6 +6516,9 @@
       }
     } else if (E.e_machine == EM_RISCV)
       W.printFlags("Flags", E.e_flags, makeArrayRef(ElfHeaderRISCVFlags));
+    else if (E.e_machine == EM_LOONGARCH)
+      W.printFlags("Flags", E.e_flags, makeArrayRef(ElfHeaderLoongArchFlags),
+                   unsigned(ELF::EF_LOONGARCH_BASE_ABI_MASK));
     else if (E.e_machine == EM_AVR)
       W.printFlags("Flags", E.e_flags, makeArrayRef(ElfHeaderAVRFlags),
                    unsigned(ELF::EF_AVR_ARCH_MASK));