Index: contrib/elftoolchain/common/elfdefinitions.h
===================================================================
--- contrib/elftoolchain/common/elfdefinitions.h
+++ contrib/elftoolchain/common/elfdefinitions.h
@@ -33,7 +33,7 @@
  *   See: http://www.sco.com/developers/gabi/latest/ch4.intro.html
  * - The May 1998 (version 1.5) draft of "The ELF-64 object format".
  * - Processor-specific ELF ABI definitions for sparc, i386, amd64, mips,
- *   ia64, and powerpc processors.
+ *   ia64, powerpc, and RISC-V processors.
  * - The "Linkers and Libraries Guide", from Sun Microsystems.
  */
 
@@ -426,6 +426,20 @@
 	"-mrelocatable flag")						\
 _ELF_DEFINE_EF(EF_PPC_RELOCATABLE_LIB, 0x00008000UL,			\
 	"-mrelocatable-lib flag")					\
+_ELF_DEFINE_EF(EF_RISCV_RVC,	    0x00000001UL,			\
+	"Compressed instruction extension")				\
+_ELF_DEFINE_EF(EF_RISCV_FLOAT_ABI_SOFT, 0x00000000UL,			\
+	"Software emulated floating point")				\
+_ELF_DEFINE_EF(EF_RISCV_FLOAT_ABI_SINGLE, 0x00000002UL,			\
+	"Single precision floating point")				\
+_ELF_DEFINE_EF(EF_RISCV_FLOAT_ABI_DOUBLE, 0x00000004UL,			\
+	"Double precision floating point")				\
+_ELF_DEFINE_EF(EF_RISCV_FLOAT_ABI_QUAD, 0x00000006UL,			\
+	"Quad precision floating point")				\
+_ELF_DEFINE_EF(EF_RISCV_RVE,	    0x00000008UL,			\
+	"Compressed instruction ABI")					\
+_ELF_DEFINE_EF(EF_RISCV_TSO,	    0x00000010UL,			\
+	"RVTSO memory consistency model")				\
 _ELF_DEFINE_EF(EF_SPARC_EXT_MASK,   0x00ffff00UL,			\
 	"Vendor Extension mask")					\
 _ELF_DEFINE_EF(EF_SPARC_32PLUS,     0x00000100UL,			\
Index: contrib/elftoolchain/readelf/readelf.c
===================================================================
--- contrib/elftoolchain/readelf/readelf.c
+++ contrib/elftoolchain/readelf/readelf.c
@@ -431,6 +431,13 @@
 	{0, NULL}
 };
 
+static struct eflags_desc riscv_eflags_desc[] = {
+	{EF_RISCV_RVC, "RVC"},
+	{EF_RISCV_RVE, "RVE"},
+	{EF_RISCV_TSO, "TSO"},
+	{0, NULL}
+};
+
 static struct eflags_desc sparc_eflags_desc[] = {
 	{EF_SPARC_32PLUS, "v8+"},
 	{EF_SPARC_SUN_US1, "ultrasparcI"},
@@ -2294,6 +2301,23 @@
 	case EM_PPC64:
 		edesc = powerpc_eflags_desc;
 		break;
+	case EM_RISCV:
+		switch (e_flags & EF_RISCV_FLOAT_ABI_QUAD) {
+		case EF_RISCV_FLOAT_ABI_SOFT:
+			printf(", soft-float ABI");
+			break;
+		case EF_RISCV_FLOAT_ABI_SINGLE:
+			printf(", single-float ABI");
+			break;
+		case EF_RISCV_FLOAT_ABI_DOUBLE:
+			printf(", double-float ABI");
+			break;
+		case EF_RISCV_FLOAT_ABI_QUAD:
+			printf(", quad-float ABI");
+			break;
+		}
+		edesc = riscv_eflags_desc;
+		break;
 	case EM_SPARC:
 	case EM_SPARC32PLUS:
 	case EM_SPARCV9: