23 files changed, 111 insertions, 36 deletions
diff --git a/libgo/configure b/libgo/configure
index aba4dc396fc..c5f8e8a3763 100755
--- a/libgo/configure
+++ b/libgo/configure
@@ -13653,10 +13653,10 @@ esac
 #   - libgo/go/syscall/endian_XX.go
 #   - possibly others
 # - possibly update files in libgo/go/internal/syscall/unix
-ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le s390 s390x sh shbe sparc sparc64"
+ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le riscv64 s390 s390x sh shbe sparc sparc64"
 
 # All known GOARCH family values.
-ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 S390 S390X SH SPARC SPARC64"
+ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 RISCV64 S390 S390X SH SPARC SPARC64"
 
 GOARCH=unknown
 case ${host} in
@@ -13773,6 +13773,9 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     ;;
+  riscv64-*-*)
+    GOARCH=riscv64
+    ;;
   s390*-*-*)
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -14209,7 +14212,7 @@ if test "${libgo_cv_lib_pthread+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   CFLAGS_hold=$CFLAGS
-CFLAGS="$CFLAGS -pthread"
+CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 int i;
@@ -14226,7 +14229,8 @@ fi
 $as_echo "$libgo_cv_lib_pthread" >&6; }
 PTHREAD_CFLAGS=
 if test "$libgo_cv_lib_pthread" = yes; then
-  PTHREAD_CFLAGS=-pthread
+  # RISC-V apparently adds -latomic when using -pthread.
+  PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
 fi
 
 
diff --git a/libgo/configure.ac b/libgo/configure.ac
index 1264a1d2524..eabe294afa9 100644
--- a/libgo/configure.ac
+++ b/libgo/configure.ac
@@ -224,10 +224,10 @@ AC_SUBST(USE_DEJAGNU)
 #   - libgo/go/syscall/endian_XX.go
 #   - possibly others
 # - possibly update files in libgo/go/internal/syscall/unix
-ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le s390 s390x sh shbe sparc sparc64"
+ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le riscv64 s390 s390x sh shbe sparc sparc64"
 
 # All known GOARCH family values.
-ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 S390 S390X SH SPARC SPARC64"
+ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 RISCV64 S390 S390X SH SPARC SPARC64"
 
 GOARCH=unknown
 case ${host} in
@@ -304,6 +304,9 @@ AC_COMPILE_IFELSE([
 [GOARCH=ppc64le],
 [GOARCH=ppc64])])
     ;;
+  riscv64-*-*)
+    GOARCH=riscv64
+    ;;
   s390*-*-*)
     AC_COMPILE_IFELSE([
 #if defined(__s390x__)
@@ -493,14 +496,15 @@ dnl Test whether the compiler supports the -pthread option.
 AC_CACHE_CHECK([whether -pthread is supported],
 [libgo_cv_lib_pthread],
 [CFLAGS_hold=$CFLAGS
-CFLAGS="$CFLAGS -pthread"
+CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
 AC_COMPILE_IFELSE([[int i;]],
 [libgo_cv_lib_pthread=yes],
 [libgo_cv_lib_pthread=no])
 CFLAGS=$CFLAGS_hold])
 PTHREAD_CFLAGS=
 if test "$libgo_cv_lib_pthread" = yes; then
-  PTHREAD_CFLAGS=-pthread
+  # RISC-V apparently adds -latomic when using -pthread.
+  PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
 fi
 AC_SUBST(PTHREAD_CFLAGS)
 
diff --git a/libgo/go/cmd/cgo/main.go b/libgo/go/cmd/cgo/main.go
index f5c231ced6d..6baabfd1336 100644
--- a/libgo/go/cmd/cgo/main.go
+++ b/libgo/go/cmd/cgo/main.go
@@ -168,6 +168,7 @@ var ptrSizeMap = map[string]int64{
 	"ppc":         4,
 	"ppc64":       8,
 	"ppc64le":     8,
+	"riscv64":     8,
 	"s390":        4,
 	"s390x":       8,
 	"sh":          4,
@@ -192,6 +193,7 @@ var intSizeMap = map[string]int64{
 	"ppc":         4,
 	"ppc64":       8,
 	"ppc64le":     8,
+	"riscv64":     8,
 	"s390":        4,
 	"s390x":       8,
 	"sh":          4,
diff --git a/libgo/go/go/build/syslist.go b/libgo/go/go/build/syslist.go
index 6bf72630e7c..679d195025e 100644
--- a/libgo/go/go/build/syslist.go
+++ b/libgo/go/go/build/syslist.go
@@ -5,4 +5,4 @@
 package build
 
 const goosList = "aix android darwin dragonfly freebsd linux nacl netbsd openbsd plan9 solaris windows zos "
-const goarchList = "386 amd64 amd64p32 arm armbe arm64 arm64be alpha m68k ppc64 ppc64le mips mipsle mips64 mips64le mips64p32 mips64p32le ppc s390 s390x sh shbe sparc sparc64"
+const goarchList = "386 amd64 amd64p32 arm armbe arm64 arm64be alpha m68k ppc64 ppc64le mips mipsle mips64 mips64le mips64p32 mips64p32le ppc riscv64 s390 s390x sh shbe sparc sparc64"
diff --git a/libgo/go/internal/syscall/unix/getrandom_linux_generic.go b/libgo/go/internal/syscall/unix/getrandom_linux_generic.go
index 8425800b6da..d6af3dea8d7 100644
--- a/libgo/go/internal/syscall/unix/getrandom_linux_generic.go
+++ b/libgo/go/internal/syscall/unix/getrandom_linux_generic.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build arm64
+// +build arm64 riscv64
 
 package unix
 
diff --git a/libgo/go/runtime/chan.go b/libgo/go/runtime/chan.go
index bf708aec5c4..87f7879e6f5 100644
--- a/libgo/go/runtime/chan.go
+++ b/libgo/go/runtime/chan.go
@@ -148,6 +148,11 @@ func chansend1(c *hchan, elem unsafe.Pointer) {
  * the operation; we'll see that it's now closed.
  */
 func chansend(c *hchan, ep unsafe.Pointer, block bool, callerpc uintptr) bool {
+	// Check preemption, since unlike gc we don't check on every call.
+	if getg().preempt {
+		checkPreempt()
+	}
+
 	if c == nil {
 		if !block {
 			return false
@@ -430,6 +435,11 @@ func chanrecv(c *hchan, ep unsafe.Pointer, block bool) (selected, received bool)
 		print("chanrecv: chan=", c, "\n")
 	}
 
+	// Check preemption, since unlike gc we don't check on every call.
+	if getg().preempt {
+		checkPreempt()
+	}
+
 	if c == nil {
 		if !block {
 			return
diff --git a/libgo/go/runtime/hash64.go b/libgo/go/runtime/hash64.go
index 5912943a4e9..74775a88f26 100644
--- a/libgo/go/runtime/hash64.go
+++ b/libgo/go/runtime/hash64.go
@@ -6,7 +6,7 @@
 //   xxhash: https://code.google.com/p/xxhash/
 // cityhash: https://code.google.com/p/cityhash/
 
-// +build amd64 amd64p32 arm64 mips64 mips64le ppc64 ppc64le s390x alpha arm64be ia64 mips64p32 mips64p32le sparc64
+// +build amd64 amd64p32 arm64 mips64 mips64le ppc64 ppc64le s390x alpha arm64be ia64 mips64p32 mips64p32le sparc64 riscv64
 
 package runtime
 
diff --git a/libgo/go/runtime/hashmap.go b/libgo/go/runtime/hashmap.go
index a1fe49e9305..aba9abd7aab 100644
--- a/libgo/go/runtime/hashmap.go
+++ b/libgo/go/runtime/hashmap.go
@@ -356,6 +356,11 @@ func makemap(t *maptype, hint int, h *hmap) *hmap {
 // NOTE: The returned pointer may keep the whole map live, so don't
 // hold onto it for very long.
 func mapaccess1(t *maptype, h *hmap, key unsafe.Pointer) unsafe.Pointer {
+	// Check preemption, since unlike gc we don't check on every call.
+	if getg().preempt {
+		checkPreempt()
+	}
+
 	if raceenabled && h != nil {
 		callerpc := getcallerpc()
 		pc := funcPC(mapaccess1)
@@ -409,6 +414,11 @@ func mapaccess1(t *maptype, h *hmap, key unsafe.Pointer) unsafe.Pointer {
 }
 
 func mapaccess2(t *maptype, h *hmap, key unsafe.Pointer) (unsafe.Pointer, bool) {
+	// Check preemption, since unlike gc we don't check on every call.
+	if getg().preempt {
+		checkPreempt()
+	}
+
 	if raceenabled && h != nil {
 		callerpc := getcallerpc()
 		pc := funcPC(mapaccess2)
@@ -463,6 +473,11 @@ func mapaccess2(t *maptype, h *hmap, key unsafe.Pointer) (unsafe.Pointer, bool)
 
 // returns both key and value. Used by map iterator
 func mapaccessK(t *maptype, h *hmap, key unsafe.Pointer) (unsafe.Pointer, unsafe.Pointer) {
+	// Check preemption, since unlike gc we don't check on every call.
+	if getg().preempt {
+		checkPreempt()
+	}
+
 	if h == nil || h.count == 0 {
 		return nil, nil
 	}
@@ -521,6 +536,11 @@ func mapaccess2_fat(t *maptype, h *hmap, key, zero unsafe.Pointer) (unsafe.Point
 
 // Like mapaccess, but allocates a slot for the key if it is not present in the map.
 func mapassign(t *maptype, h *hmap, key unsafe.Pointer) unsafe.Pointer {
+	// Check preemption, since unlike gc we don't check on every call.
+	if getg().preempt {
+		checkPreempt()
+	}
+
 	if h == nil {
 		panic(plainError("assignment to entry in nil map"))
 	}
@@ -772,6 +792,11 @@ func mapiterinit(t *maptype, h *hmap, it *hiter) {
 }
 
 func mapiternext(it *hiter) {
+	// Check preemption, since unlike gc we don't check on every call.
+	if getg().preempt {
+		checkPreempt()
+	}
+
 	h := it.h
 	if raceenabled {
 		callerpc := getcallerpc()
diff --git a/libgo/go/runtime/lfstack_64bit.go b/libgo/go/runtime/lfstack_64bit.go
index 95d0eba57a6..dca17181e3e 100644
--- a/libgo/go/runtime/lfstack_64bit.go
+++ b/libgo/go/runtime/lfstack_64bit.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build amd64 arm64 mips64 mips64le ppc64 ppc64le s390x arm64be alpha sparc64 ia64
+// +build amd64 arm64 mips64 mips64le ppc64 ppc64le s390x arm64be alpha sparc64 ia64 riscv64
 
 package runtime
 
diff --git a/libgo/go/runtime/malloc.go b/libgo/go/runtime/malloc.go
index 88e4ba3657b..c27aa487df3 100644
--- a/libgo/go/runtime/malloc.go
+++ b/libgo/go/runtime/malloc.go
@@ -826,6 +826,7 @@ func mallocgc(size uintptr, typ *_type, needzero bool) unsafe.Pointer {
 		}
 	}
 
+	// Check preemption, since unlike gc we don't check on every call.
 	if getg().preempt {
 		checkPreempt()
 	}
diff --git a/libgo/go/runtime/proc.go b/libgo/go/runtime/proc.go
index edf41405c1c..20fa0ad05be 100644
--- a/libgo/go/runtime/proc.go
+++ b/libgo/go/runtime/proc.go
@@ -2794,6 +2794,13 @@ func exitsyscall(dummy int32) {
 		exitsyscallclear(_g_)
 		_g_.m.locks--
 		_g_.throwsplit = false
+
+		// Check preemption, since unlike gc we don't check on
+		// every call.
+		if getg().preempt {
+			checkPreempt()
+		}
+
 		return
 	}
 
@@ -4084,8 +4091,9 @@ func preemptone(_p_ *p) bool {
 	// setting a global variable and figuring out a way to efficiently
 	// check that global variable.
 	//
-	// For now we check gp.preempt in schedule and mallocgc,
-	// which is at least better than doing nothing at all.
+	// For now we check gp.preempt in schedule, mallocgc, selectgo,
+	// and a few other places, which is at least better than doing
+	// nothing at all.
 
 	return true
 }
diff --git a/libgo/go/runtime/select.go b/libgo/go/runtime/select.go
index 096af52be35..1c5124b4704 100644
--- a/libgo/go/runtime/select.go
+++ b/libgo/go/runtime/select.go
@@ -584,6 +584,13 @@ retc:
 	if cas.releasetime > 0 {
 		blockevent(cas.releasetime-t0, 1)
 	}
+
+	// Check preemption, since unlike gc we don't check on every call.
+	// A test case for this one is BenchmarkPingPongHog in proc_test.go.
+	if dfl != nil && getg().preempt {
+		checkPreempt()
+	}
+
 	return casi
 
 sclose:
diff --git a/libgo/go/runtime/unaligned1.go b/libgo/go/runtime/unaligned1.go
index c94f19eeb94..2f5b63a4c7c 100644
--- a/libgo/go/runtime/unaligned1.go
+++ b/libgo/go/runtime/unaligned1.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build 386 amd64 amd64p32 arm64 ppc64 ppc64le s390x ppc s390 arm64be
+// +build 386 amd64 amd64p32 arm64 ppc64 ppc64le s390x ppc s390 arm64be riscv64
 
 package runtime
 
diff --git a/libgo/go/syscall/endian_little.go b/libgo/go/syscall/endian_little.go
index b91d4bb72de..4a7312198f5 100644
--- a/libgo/go/syscall/endian_little.go
+++ b/libgo/go/syscall/endian_little.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
-// +build 386 amd64 amd64p32 arm arm64 ppc64le mips64le mipsle alpha ia64 mips64p32le sh
+// +build 386 amd64 amd64p32 arm arm64 ppc64le mips64le mipsle alpha ia64 mips64p32le sh riscv64
 
 package syscall
 
diff --git a/libgo/go/syscall/libcall_linux_ustat.go b/libgo/go/syscall/libcall_linux_ustat.go
index 261f086f47e..3aff344f25c 100644
--- a/libgo/go/syscall/libcall_linux_ustat.go
+++ b/libgo/go/syscall/libcall_linux_ustat.go
@@ -4,7 +4,7 @@
 
 // GNU/Linux library ustat call.
 // This is not supported on some kernels, such as arm64.
-// +build !arm64
+// +build !arm64,!riscv64
 
 package syscall
 
diff --git a/libgo/goarch.sh b/libgo/goarch.sh
index 9165e6a19a3..c63cbbaa76b 100755
--- a/libgo/goarch.sh
+++ b/libgo/goarch.sh
@@ -146,6 +146,10 @@ case $goarch in
 		;;
 	esac
 	;;
+    riscv64)
+	family=RISCV64
+	pcquantum=2
+	;;
     s390)
 	family=S390
 	bigendian=true
diff --git a/libgo/match.sh b/libgo/match.sh
index 62405556ede..9247ec6f40d 100755
--- a/libgo/match.sh
+++ b/libgo/match.sh
@@ -116,7 +116,7 @@ for f in $gofiles; do
 	aix | android | darwin | dragonfly | freebsd | linux | nacl | netbsd | openbsd | plan9 | solaris | windows)
 	    tag1=nonmatchingtag
 	    ;;
-	386 | amd64 | amd64p32 | arm | armbe | arm64 | arm64be | alpha | ia64 | m68k | ppc64 | ppc64le | mips | mipsle | mips64 | mips64le | mips64p32 | mips64p32le | ppc | s390 | s390x | sh | shbe | sparc | sparc64)
+	386 | amd64 | amd64p32 | arm | armbe | arm64 | arm64be | alpha | ia64 | m68k | ppc64 | ppc64le | mips | mipsle | mips64 | mips64le | mips64p32 | mips64p32le | ppc | riscv64 | s390 | s390x | sh | shbe | sparc | sparc64)
 	    tag1=nonmatchingtag
 	    ;;
     esac
@@ -128,7 +128,7 @@ for f in $gofiles; do
 	aix | android | darwin | dragonfly | freebsd | linux | nacl | netbsd | openbsd | plan9 | solaris | windows)
 	    tag2=nonmatchingtag
 	    ;;
-	386 | amd64 | amd64p32 | arm | armbe | arm64 | arm64be | alpha | ia64 | m68k | ppc64 | ppc64le | mips | mipsle | mips64 | mips64le | mips64p32 | mips64p32le | ppc | s390 | s390x | sh | shbe | sparc | sparc64)
+	386 | amd64 | amd64p32 | arm | armbe | arm64 | arm64be | alpha | ia64 | m68k | ppc64 | ppc64le | mips | mipsle | mips64 | mips64le | mips64p32 | mips64p32le | ppc | riscv64 | s390 | s390x | sh | shbe | sparc | sparc64)
 	    tag2=nonmatchingtag
 	    ;;
     esac
diff --git a/libgo/misc/cgo/testcshared/src/libgo2/dup2.go b/libgo/misc/cgo/testcshared/src/libgo2/dup2.go
index d18f0b130d3..d343aa54d9a 100644
--- a/libgo/misc/cgo/testcshared/src/libgo2/dup2.go
+++ b/libgo/misc/cgo/testcshared/src/libgo2/dup2.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux,!arm64 netbsd openbsd
+// +build darwin dragonfly freebsd linux,!arm64,!riscv64 netbsd openbsd
 
 package main
 
diff --git a/libgo/misc/cgo/testcshared/src/libgo2/dup3.go b/libgo/misc/cgo/testcshared/src/libgo2/dup3.go
index c9c65a6e3c1..459f0dc1968 100644
--- a/libgo/misc/cgo/testcshared/src/libgo2/dup3.go
+++ b/libgo/misc/cgo/testcshared/src/libgo2/dup3.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux,arm64
+// +build linux,arm64 linux,riscv64
 
 package main
 
diff --git a/libgo/runtime/go-caller.c b/libgo/runtime/go-caller.c
index ee8abdc67fe..6b26ddccbcf 100644
--- a/libgo/runtime/go-caller.c
+++ b/libgo/runtime/go-caller.c
@@ -129,18 +129,26 @@ __go_get_backtrace_state ()
    is the entry on the stack of inlined functions; -1 means the last
    one.  */
 
-_Bool
+static _Bool
 __go_file_line (uintptr pc, int index, String *fn, String *file, intgo *line)
 {
   struct caller c;
+  struct backtrace_state *state;
 
   runtime_memclr (&c, sizeof c);
   c.index = index;
-  backtrace_pcinfo (__go_get_backtrace_state (), pc, callback,
-		    error_callback, &c);
+  state = __go_get_backtrace_state ();
+  backtrace_pcinfo (state, pc, callback, error_callback, &c);
   *fn = c.fn;
   *file = c.file;
   *line = c.line;
+
+  // If backtrace_pcinfo didn't get the function name from the debug
+  // info, try to get it from the symbol table.
+  if (fn->len == 0)
+    backtrace_syminfo (state, pc, __go_syminfo_fnname_callback,
+		       error_callback, fn);
+
   return c.file.len > 0;
 }
 
diff --git a/libgo/runtime/go-callers.c b/libgo/runtime/go-callers.c
index 590315376e3..b16ae0c4036 100644
--- a/libgo/runtime/go-callers.c
+++ b/libgo/runtime/go-callers.c
@@ -145,16 +145,17 @@ callback (void *data, uintptr_t pc, const char *filename, int lineno,
 
 /* Syminfo callback.  */
 
-static void
-syminfo_fnname_callback (void *data, uintptr_t pc __attribute__ ((unused)),
-			 const char *symname,
-			 uintptr_t address __attribute__ ((unused)),
-			 uintptr_t size __attribute__ ((unused)))
+void
+__go_syminfo_fnname_callback (void *data,
+			      uintptr_t pc __attribute__ ((unused)),
+			      const char *symname,
+			      uintptr_t address __attribute__ ((unused)),
+			      uintptr_t size __attribute__ ((unused)))
 {
-  Location* locptr = (Location*) data;
+  String* strptr = (String*) data;
 
   if (symname != NULL)
-    locptr->function = runtime_gostringnocopy ((const byte *) symname);
+    *strptr = runtime_gostringnocopy ((const byte *) symname);
 }
 
 /* Error callback.  */
@@ -228,8 +229,8 @@ runtime_callers (int32 skip, Location *locbuf, int32 m, bool keep_thunks)
   for (i = 0; i < data.index; ++i)
     {
       if (locbuf[i].function.len == 0 && locbuf[i].pc != 0)
-	backtrace_syminfo (state, locbuf[i].pc, syminfo_fnname_callback,
-			   error_callback, &locbuf[i]);
+	backtrace_syminfo (state, locbuf[i].pc, __go_syminfo_fnname_callback,
+			   error_callback, &locbuf[i].function);
     }
 
   return data.index;
diff --git a/libgo/runtime/runtime.h b/libgo/runtime/runtime.h
index 0fafe821441..0ffcf4bde9e 100644
--- a/libgo/runtime/runtime.h
+++ b/libgo/runtime/runtime.h
@@ -456,7 +456,8 @@ extern uintptr runtime_stacks_sys;
 
 struct backtrace_state;
 extern struct backtrace_state *__go_get_backtrace_state(void);
-extern _Bool __go_file_line(uintptr, int, String*, String*, intgo *);
+extern void __go_syminfo_fnname_callback(void*, uintptr_t, const char*,
+					 uintptr_t, uintptr_t);
 extern void runtime_main(void*)
   __asm__(GOSYM_PREFIX "runtime.main");
 
diff --git a/libgo/testsuite/gotest b/libgo/testsuite/gotest
index f978042cccc..06848fdb1f0 100755
--- a/libgo/testsuite/gotest
+++ b/libgo/testsuite/gotest
@@ -314,7 +314,7 @@ x)
 	    aix | android | darwin | dragonfly | freebsd | linux | nacl | netbsd | openbsd | plan9 | solaris | windows)
 		tag1=nonmatchingtag
 		;;
-	    386 | amd64 | amd64p32 | arm | armbe | arm64 | arm64be | alpha | ia64 | m68k | ppc64 | ppc64le | mips | mipsle | mips64 | mips64le | mips64p32 | mips64p32le | ppc | s390 | s390x | sh | shbe | sparc | sparc64)
+	    386 | amd64 | amd64p32 | arm | armbe | arm64 | arm64be | alpha | ia64 | m68k | ppc64 | ppc64le | mips | mipsle | mips64 | mips64le | mips64p32 | mips64p32le | ppc | riscv64 | s390 | s390x | sh | shbe | sparc | sparc64)
 		tag1=nonmatchingtag
 		;;
 	    esac
@@ -326,7 +326,7 @@ x)
 	    aix | android | darwin | dragonfly | freebsd | linux | nacl | netbsd | openbsd | plan9 | solaris | windows)
 		tag2=nonmatchingtag
 		;;
-	    386 | amd64 | amd64p32 | arm | armbe | arm64 | arm64be | alpha | ia64 | m68k | ppc64 | ppc64le | mips | mipsle | mips64 | mips64le | mips64p32 | mips64p32le | ppc | s390 | s390x | sh | shbe | sparc | sparc64)
+	    386 | amd64 | amd64p32 | arm | armbe | arm64 | arm64be | alpha | ia64 | m68k | ppc64 | ppc64le | mips | mipsle | mips64 | mips64le | mips64p32 | mips64p32le | ppc | riscv64 | s390 | s390x | sh | shbe | sparc | sparc64)
 		tag2=nonmatchingtag
 		;;
 	    esac